diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/audio/buf.c | 107 | ||||
-rw-r--r-- | src/audio/buf.h | 74 | ||||
-rw-r--r-- | src/audio/player.c | 197 | ||||
-rw-r--r-- | src/audio/player.h | 4 | ||||
-rw-r--r-- | src/audio/stb_vorbis.c | 5563 | ||||
-rw-r--r-- | src/media.c | 8 |
6 files changed, 5799 insertions, 154 deletions
diff --git a/src/audio/buf.c b/src/audio/buf.c new file mode 100644 index 00000000..e61164d4 --- /dev/null +++ b/src/audio/buf.c | |||
@@ -0,0 +1,107 @@ | |||
1 | /* Copyright 2020 Jaakko Keränen <jaakko.keranen@iki.fi> | ||
2 | |||
3 | Redistribution and use in source and binary forms, with or without | ||
4 | modification, are permitted provided that the following conditions are met: | ||
5 | |||
6 | 1. Redistributions of source code must retain the above copyright notice, this | ||
7 | list of conditions and the following disclaimer. | ||
8 | 2. Redistributions in binary form must reproduce the above copyright notice, | ||
9 | this list of conditions and the following disclaimer in the documentation | ||
10 | and/or other materials provided with the distribution. | ||
11 | |||
12 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | ||
13 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | ||
14 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
15 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR | ||
16 | ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | ||
17 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
18 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | ||
19 | ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
20 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
21 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ | ||
22 | |||
23 | #include "buf.h" | ||
24 | |||
25 | iDefineTypeConstruction(InputBuf) | ||
26 | |||
27 | void init_InputBuf(iInputBuf *d) { | ||
28 | init_Mutex(&d->mtx); | ||
29 | init_Condition(&d->changed); | ||
30 | init_Block(&d->data, 0); | ||
31 | d->isComplete = iTrue; | ||
32 | } | ||
33 | |||
34 | void deinit_InputBuf(iInputBuf *d) { | ||
35 | deinit_Block(&d->data); | ||
36 | deinit_Condition(&d->changed); | ||
37 | deinit_Mutex(&d->mtx); | ||
38 | } | ||
39 | |||
40 | size_t size_InputBuf(const iInputBuf *d) { | ||
41 | return size_Block(&d->data); | ||
42 | } | ||
43 | |||
44 | /*----------------------------------------------------------------------------------------------*/ | ||
45 | |||
46 | iDefineTypeConstructionArgs(SampleBuf, (SDL_AudioFormat format, size_t numChannels, size_t count), | ||
47 | format, numChannels, count) | ||
48 | |||
49 | void init_SampleBuf(iSampleBuf *d, SDL_AudioFormat format, size_t numChannels, size_t count) { | ||
50 | d->format = format; | ||
51 | d->numChannels = numChannels; | ||
52 | d->sampleSize = SDL_AUDIO_BITSIZE(format) / 8 * numChannels; | ||
53 | d->count = count + 1; /* considered empty if head==tail */ | ||
54 | d->data = malloc(d->sampleSize * d->count); | ||
55 | d->head = 0; | ||
56 | d->tail = 0; | ||
57 | init_Condition(&d->moreNeeded); | ||
58 | } | ||
59 | |||
60 | void deinit_SampleBuf(iSampleBuf *d) { | ||
61 | deinit_Condition(&d->moreNeeded); | ||
62 | free(d->data); | ||
63 | } | ||
64 | |||
65 | size_t size_SampleBuf(const iSampleBuf *d) { | ||
66 | return d->head - d->tail; | ||
67 | } | ||
68 | |||
69 | size_t vacancy_SampleBuf(const iSampleBuf *d) { | ||
70 | return d->count - size_SampleBuf(d) - 1; | ||
71 | } | ||
72 | |||
73 | iBool isFull_SampleBuf(const iSampleBuf *d) { | ||
74 | return vacancy_SampleBuf(d) == 0; | ||
75 | } | ||
76 | |||
77 | void write_SampleBuf(iSampleBuf *d, const void *samples, const size_t n) { | ||
78 | iAssert(n <= vacancy_SampleBuf(d)); | ||
79 | const size_t headPos = d->head % d->count; | ||
80 | const size_t avail = d->count - headPos; | ||
81 | if (n > avail) { | ||
82 | const char *in = samples; | ||
83 | memcpy(ptr_SampleBuf_(d, headPos), in, d->sampleSize * avail); | ||
84 | in += d->sampleSize * avail; | ||
85 | memcpy(ptr_SampleBuf_(d, 0), in, d->sampleSize * (n - avail)); | ||
86 | } | ||
87 | else { | ||
88 | memcpy(ptr_SampleBuf_(d, headPos), samples, d->sampleSize * n); | ||
89 | } | ||
90 | d->head += n; | ||
91 | } | ||
92 | |||
93 | void read_SampleBuf(iSampleBuf *d, const size_t n, void *samples_out) { | ||
94 | iAssert(n <= size_SampleBuf(d)); | ||
95 | const size_t tailPos = d->tail % d->count; | ||
96 | const size_t avail = d->count - tailPos; | ||
97 | if (n > avail) { | ||
98 | char *out = samples_out; | ||
99 | memcpy(out, ptr_SampleBuf_(d, tailPos), d->sampleSize * avail); | ||
100 | out += d->sampleSize * avail; | ||
101 | memcpy(out, ptr_SampleBuf_(d, 0), d->sampleSize * (n - avail)); | ||
102 | } | ||
103 | else { | ||
104 | memcpy(samples_out, ptr_SampleBuf_(d, tailPos), d->sampleSize * n); | ||
105 | } | ||
106 | d->tail += n; | ||
107 | } | ||
diff --git a/src/audio/buf.h b/src/audio/buf.h new file mode 100644 index 00000000..de123481 --- /dev/null +++ b/src/audio/buf.h | |||
@@ -0,0 +1,74 @@ | |||
1 | /* Copyright 2020 Jaakko Keränen <jaakko.keranen@iki.fi> | ||
2 | |||
3 | Redistribution and use in source and binary forms, with or without | ||
4 | modification, are permitted provided that the following conditions are met: | ||
5 | |||
6 | 1. Redistributions of source code must retain the above copyright notice, this | ||
7 | list of conditions and the following disclaimer. | ||
8 | 2. Redistributions in binary form must reproduce the above copyright notice, | ||
9 | this list of conditions and the following disclaimer in the documentation | ||
10 | and/or other materials provided with the distribution. | ||
11 | |||
12 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | ||
13 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | ||
14 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
15 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR | ||
16 | ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | ||
17 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
18 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | ||
19 | ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
20 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
21 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ | ||
22 | |||
23 | #pragma once | ||
24 | |||
25 | #include "the_Foundation/block.h" | ||
26 | #include "the_Foundation/mutex.h" | ||
27 | |||
28 | #include <SDL_audio.h> | ||
29 | |||
30 | iDeclareType(InputBuf) | ||
31 | iDeclareType(SampleBuf) | ||
32 | |||
33 | #if !defined (AUDIO_S24LSB) | ||
34 | # define AUDIO_S24LSB 0x8018 /* 24-bit integer samples */ | ||
35 | #endif | ||
36 | #if !defined (AUDIO_F64LSB) | ||
37 | # define AUDIO_F64LSB 0x8140 /* 64-bit floating point samples */ | ||
38 | #endif | ||
39 | |||
40 | struct Impl_InputBuf { | ||
41 | iMutex mtx; | ||
42 | iCondition changed; | ||
43 | iBlock data; | ||
44 | iBool isComplete; | ||
45 | }; | ||
46 | |||
47 | iDeclareTypeConstruction(InputBuf) | ||
48 | |||
49 | size_t size_InputBuf (const iInputBuf *); | ||
50 | |||
51 | /*----------------------------------------------------------------------------------------------*/ | ||
52 | |||
53 | struct Impl_SampleBuf { | ||
54 | SDL_AudioFormat format; | ||
55 | uint8_t numChannels; | ||
56 | uint8_t sampleSize; /* as bytes; one sample includes values for all channels */ | ||
57 | void * data; | ||
58 | size_t count; | ||
59 | size_t head, tail; | ||
60 | iCondition moreNeeded; | ||
61 | }; | ||
62 | |||
63 | iDeclareTypeConstructionArgs(SampleBuf, SDL_AudioFormat format, size_t numChannels, size_t count) | ||
64 | |||
65 | size_t size_SampleBuf (const iSampleBuf *); | ||
66 | iBool isFull_SampleBuf (const iSampleBuf *); | ||
67 | size_t vacancy_SampleBuf (const iSampleBuf *); | ||
68 | |||
69 | iLocalDef void *ptr_SampleBuf_(iSampleBuf *d, size_t pos) { | ||
70 | return ((char *) d->data) + (d->sampleSize * pos); | ||
71 | } | ||
72 | |||
73 | void write_SampleBuf (iSampleBuf *, const void *samples, const size_t n); | ||
74 | void read_SampleBuf (iSampleBuf *, const size_t n, void *samples_out); | ||
diff --git a/src/audio/player.c b/src/audio/player.c index 07f41f01..0825dabd 100644 --- a/src/audio/player.c +++ b/src/audio/player.c | |||
@@ -21,146 +21,38 @@ ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |||
21 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ | 21 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ |
22 | 22 | ||
23 | #include "player.h" | 23 | #include "player.h" |
24 | #include "buf.h" | ||
25 | |||
26 | #define STB_VORBIS_HEADER_ONLY | ||
27 | #include "stb_vorbis.c" | ||
24 | 28 | ||
25 | #include <the_Foundation/buffer.h> | 29 | #include <the_Foundation/buffer.h> |
26 | #include <the_Foundation/thread.h> | 30 | #include <the_Foundation/thread.h> |
27 | #include <SDL_audio.h> | 31 | #include <SDL_audio.h> |
28 | 32 | ||
29 | iDeclareType(InputBuf) | ||
30 | |||
31 | #if !defined (AUDIO_S24LSB) | ||
32 | # define AUDIO_S24LSB 0x8018 /* 24-bit integer samples */ | ||
33 | #endif | ||
34 | #if !defined (AUDIO_F64LSB) | ||
35 | # define AUDIO_F64LSB 0x8140 /* 64-bit floating point samples */ | ||
36 | #endif | ||
37 | |||
38 | struct Impl_InputBuf { | ||
39 | iMutex mtx; | ||
40 | iCondition changed; | ||
41 | iBlock data; | ||
42 | iBool isComplete; | ||
43 | }; | ||
44 | |||
45 | void init_InputBuf(iInputBuf *d) { | ||
46 | init_Mutex(&d->mtx); | ||
47 | init_Condition(&d->changed); | ||
48 | init_Block(&d->data, 0); | ||
49 | d->isComplete = iTrue; | ||
50 | } | ||
51 | |||
52 | void deinit_InputBuf(iInputBuf *d) { | ||
53 | deinit_Block(&d->data); | ||
54 | deinit_Condition(&d->changed); | ||
55 | deinit_Mutex(&d->mtx); | ||
56 | } | ||
57 | |||
58 | size_t size_InputBuf(const iInputBuf *d) { | ||
59 | return size_Block(&d->data); | ||
60 | } | ||
61 | |||
62 | iDefineTypeConstruction(InputBuf) | ||
63 | |||
64 | /*----------------------------------------------------------------------------------------------*/ | ||
65 | |||
66 | iDeclareType(SampleBuf) | ||
67 | |||
68 | struct Impl_SampleBuf { | ||
69 | SDL_AudioFormat format; | ||
70 | uint8_t numChannels; | ||
71 | uint8_t sampleSize; /* as bytes; one sample includes values for all channels */ | ||
72 | void * data; | ||
73 | size_t count; | ||
74 | size_t head, tail; | ||
75 | iCondition moreNeeded; | ||
76 | }; | ||
77 | |||
78 | void init_SampleBuf(iSampleBuf *d, SDL_AudioFormat format, size_t numChannels, size_t count) { | ||
79 | d->format = format; | ||
80 | d->numChannels = numChannels; | ||
81 | d->sampleSize = SDL_AUDIO_BITSIZE(format) / 8 * numChannels; | ||
82 | d->count = count + 1; /* considered empty if head==tail */ | ||
83 | d->data = malloc(d->sampleSize * d->count); | ||
84 | d->head = 0; | ||
85 | d->tail = 0; | ||
86 | init_Condition(&d->moreNeeded); | ||
87 | } | ||
88 | |||
89 | void deinit_SampleBuf(iSampleBuf *d) { | ||
90 | deinit_Condition(&d->moreNeeded); | ||
91 | free(d->data); | ||
92 | } | ||
93 | |||
94 | size_t size_SampleBuf(const iSampleBuf *d) { | ||
95 | return d->head - d->tail; | ||
96 | } | ||
97 | |||
98 | size_t vacancy_SampleBuf(const iSampleBuf *d) { | ||
99 | return d->count - size_SampleBuf(d) - 1; | ||
100 | } | ||
101 | |||
102 | iBool isFull_SampleBuf(const iSampleBuf *d) { | ||
103 | return vacancy_SampleBuf(d) == 0; | ||
104 | } | ||
105 | |||
106 | iLocalDef void *ptr_SampleBuf_(iSampleBuf *d, size_t pos) { | ||
107 | return ((char *) d->data) + (d->sampleSize * pos); | ||
108 | } | ||
109 | |||
110 | void write_SampleBuf(iSampleBuf *d, const void *samples, const size_t n) { | ||
111 | iAssert(n <= vacancy_SampleBuf(d)); | ||
112 | const size_t headPos = d->head % d->count; | ||
113 | const size_t avail = d->count - headPos; | ||
114 | if (n > avail) { | ||
115 | const char *in = samples; | ||
116 | memcpy(ptr_SampleBuf_(d, headPos), in, d->sampleSize * avail); | ||
117 | in += d->sampleSize * avail; | ||
118 | memcpy(ptr_SampleBuf_(d, 0), in, d->sampleSize * (n - avail)); | ||
119 | } | ||
120 | else { | ||
121 | memcpy(ptr_SampleBuf_(d, headPos), samples, d->sampleSize * n); | ||
122 | } | ||
123 | d->head += n; | ||
124 | } | ||
125 | |||
126 | void read_SampleBuf(iSampleBuf *d, const size_t n, void *samples_out) { | ||
127 | iAssert(n <= size_SampleBuf(d)); | ||
128 | const size_t tailPos = d->tail % d->count; | ||
129 | const size_t avail = d->count - tailPos; | ||
130 | if (n > avail) { | ||
131 | char *out = samples_out; | ||
132 | memcpy(out, ptr_SampleBuf_(d, tailPos), d->sampleSize * avail); | ||
133 | out += d->sampleSize * avail; | ||
134 | memcpy(out, ptr_SampleBuf_(d, 0), d->sampleSize * (n - avail)); | ||
135 | } | ||
136 | else { | ||
137 | memcpy(samples_out, ptr_SampleBuf_(d, tailPos), d->sampleSize * n); | ||
138 | } | ||
139 | d->tail += n; | ||
140 | } | ||
141 | |||
142 | /*----------------------------------------------------------------------------------------------*/ | 33 | /*----------------------------------------------------------------------------------------------*/ |
143 | 34 | ||
144 | iDeclareType(ContentSpec) | 35 | iDeclareType(ContentSpec) |
145 | 36 | ||
146 | struct Impl_ContentSpec { | ||
147 | SDL_AudioFormat inputFormat; | ||
148 | SDL_AudioSpec output; | ||
149 | size_t totalInputSize; | ||
150 | uint64_t totalSamples; | ||
151 | iRanges wavData; | ||
152 | }; | ||
153 | |||
154 | iDeclareType(Decoder) | ||
155 | |||
156 | enum iDecoderType { | 37 | enum iDecoderType { |
157 | none_DecoderType, | 38 | none_DecoderType, |
158 | wav_DecoderType, | 39 | wav_DecoderType, |
159 | mpeg_DecoderType, | ||
160 | vorbis_DecoderType, | 40 | vorbis_DecoderType, |
41 | mpeg_DecoderType, | ||
161 | midi_DecoderType, | 42 | midi_DecoderType, |
162 | }; | 43 | }; |
163 | 44 | ||
45 | struct Impl_ContentSpec { | ||
46 | enum iDecoderType type; | ||
47 | SDL_AudioFormat inputFormat; | ||
48 | SDL_AudioSpec output; | ||
49 | size_t totalInputSize; | ||
50 | uint64_t totalSamples; | ||
51 | iRanges dataRange; | ||
52 | }; | ||
53 | |||
54 | iDeclareType(Decoder) | ||
55 | |||
164 | struct Impl_Decoder { | 56 | struct Impl_Decoder { |
165 | enum iDecoderType type; | 57 | enum iDecoderType type; |
166 | float gain; | 58 | float gain; |
@@ -176,12 +68,12 @@ struct Impl_Decoder { | |||
176 | iRanges wavData; | 68 | iRanges wavData; |
177 | }; | 69 | }; |
178 | 70 | ||
179 | enum iDecoderParseStatus { | 71 | enum iDecoderStatus { |
180 | ok_DecoderParseStatus, | 72 | ok_DecoderStatus, |
181 | needMoreInput_DecoderParseStatus, | 73 | needMoreInput_DecoderStatus, |
182 | }; | 74 | }; |
183 | 75 | ||
184 | static enum iDecoderParseStatus parseWav_Decoder_(iDecoder *d, iRanges inputRange) { | 76 | static enum iDecoderStatus decodeWav_Decoder_(iDecoder *d, iRanges inputRange) { |
185 | const uint8_t numChannels = d->output.numChannels; | 77 | const uint8_t numChannels = d->output.numChannels; |
186 | const size_t inputSampleSize = numChannels * SDL_AUDIO_BITSIZE(d->inputFormat) / 8; | 78 | const size_t inputSampleSize = numChannels * SDL_AUDIO_BITSIZE(d->inputFormat) / 8; |
187 | const size_t vacancy = vacancy_SampleBuf(&d->output); | 79 | const size_t vacancy = vacancy_SampleBuf(&d->output); |
@@ -189,11 +81,11 @@ static enum iDecoderParseStatus parseWav_Decoder_(iDecoder *d, iRanges inputRang | |||
189 | const size_t avail = | 81 | const size_t avail = |
190 | iMin(inputRange.end - inputBytePos, d->wavData.end - inputBytePos) / inputSampleSize; | 82 | iMin(inputRange.end - inputBytePos, d->wavData.end - inputBytePos) / inputSampleSize; |
191 | if (avail == 0) { | 83 | if (avail == 0) { |
192 | return needMoreInput_DecoderParseStatus; | 84 | return needMoreInput_DecoderStatus; |
193 | } | 85 | } |
194 | const size_t n = iMin(vacancy, avail); | 86 | const size_t n = iMin(vacancy, avail); |
195 | if (n == 0) { | 87 | if (n == 0) { |
196 | return ok_DecoderParseStatus; | 88 | return ok_DecoderStatus; |
197 | } | 89 | } |
198 | void *samples = malloc(inputSampleSize * n); | 90 | void *samples = malloc(inputSampleSize * n); |
199 | /* Get a copy of the input for mixing. */ { | 91 | /* Get a copy of the input for mixing. */ { |
@@ -259,7 +151,7 @@ static enum iDecoderParseStatus parseWav_Decoder_(iDecoder *d, iRanges inputRang | |||
259 | iGuardMutex(&d->outputMutex, write_SampleBuf(&d->output, samples, n)); | 151 | iGuardMutex(&d->outputMutex, write_SampleBuf(&d->output, samples, n)); |
260 | d->currentSample += n; | 152 | d->currentSample += n; |
261 | free(samples); | 153 | free(samples); |
262 | return ok_DecoderParseStatus; | 154 | return ok_DecoderStatus; |
263 | } | 155 | } |
264 | 156 | ||
265 | static iThreadResult run_Decoder_(iThread *thread) { | 157 | static iThreadResult run_Decoder_(iThread *thread) { |
@@ -273,17 +165,17 @@ static iThreadResult run_Decoder_(iThread *thread) { | |||
273 | iAssert(inputRange.start <= inputRange.end); | 165 | iAssert(inputRange.start <= inputRange.end); |
274 | if (!d->type) break; | 166 | if (!d->type) break; |
275 | /* Have data to work on and a place to save output? */ | 167 | /* Have data to work on and a place to save output? */ |
276 | enum iDecoderParseStatus status = ok_DecoderParseStatus; | 168 | enum iDecoderStatus status = ok_DecoderStatus; |
277 | if (!isEmpty_Range(&inputRange)) { | 169 | if (!isEmpty_Range(&inputRange)) { |
278 | switch (d->type) { | 170 | switch (d->type) { |
279 | case wav_DecoderType: | 171 | case wav_DecoderType: |
280 | status = parseWav_Decoder_(d, inputRange); | 172 | status = decodeWav_Decoder_(d, inputRange); |
281 | break; | 173 | break; |
282 | default: | 174 | default: |
283 | break; | 175 | break; |
284 | } | 176 | } |
285 | } | 177 | } |
286 | if (status == needMoreInput_DecoderParseStatus) { | 178 | if (status == needMoreInput_DecoderStatus) { |
287 | lock_Mutex(&d->input->mtx); | 179 | lock_Mutex(&d->input->mtx); |
288 | if (size_InputBuf(d->input) == inputSize) { | 180 | if (size_InputBuf(d->input) == inputSize) { |
289 | wait_Condition(&d->input->changed, &d->input->mtx); | 181 | wait_Condition(&d->input->changed, &d->input->mtx); |
@@ -302,10 +194,10 @@ static iThreadResult run_Decoder_(iThread *thread) { | |||
302 | } | 194 | } |
303 | 195 | ||
304 | void init_Decoder(iDecoder *d, iInputBuf *input, const iContentSpec *spec) { | 196 | void init_Decoder(iDecoder *d, iInputBuf *input, const iContentSpec *spec) { |
305 | d->type = wav_DecoderType; | 197 | d->type = spec->type; |
306 | d->gain = 0.5f; | 198 | d->gain = 0.5f; |
307 | d->input = input; | 199 | d->input = input; |
308 | d->inputPos = spec->wavData.start; | 200 | d->inputPos = spec->dataRange.start; |
309 | d->inputFormat = spec->inputFormat; | 201 | d->inputFormat = spec->inputFormat; |
310 | d->totalInputSize = spec->totalInputSize; | 202 | d->totalInputSize = spec->totalInputSize; |
311 | init_SampleBuf(&d->output, | 203 | init_SampleBuf(&d->output, |
@@ -330,16 +222,22 @@ void deinit_Decoder(iDecoder *d) { | |||
330 | deinit_SampleBuf(&d->output); | 222 | deinit_SampleBuf(&d->output); |
331 | } | 223 | } |
332 | 224 | ||
225 | static void start_Decoder_(iDecoder *d) { | ||
226 | if (!d->thread && d->type != none_DecoderType) { | ||
227 | } | ||
228 | } | ||
229 | |||
333 | iDefineTypeConstructionArgs(Decoder, (iInputBuf *input, const iContentSpec *spec), | 230 | iDefineTypeConstructionArgs(Decoder, (iInputBuf *input, const iContentSpec *spec), |
334 | input, spec) | 231 | input, spec) |
335 | 232 | ||
336 | /*----------------------------------------------------------------------------------------------*/ | 233 | /*----------------------------------------------------------------------------------------------*/ |
337 | 234 | ||
338 | struct Impl_Player { | 235 | struct Impl_Player { |
339 | SDL_AudioSpec spec; | 236 | SDL_AudioSpec spec; |
340 | SDL_AudioDeviceID device; | 237 | SDL_AudioDeviceID device; |
341 | iInputBuf *data; | 238 | iString mime; |
342 | iDecoder *decoder; | 239 | iInputBuf * data; |
240 | iDecoder * decoder; | ||
343 | }; | 241 | }; |
344 | 242 | ||
345 | iDefineTypeConstruction(Player) | 243 | iDefineTypeConstruction(Player) |
@@ -358,8 +256,8 @@ static iContentSpec contentSpec_Player_(const iPlayer *d) { | |||
358 | const size_t dataSize = size_InputBuf(d->data); | 256 | const size_t dataSize = size_InputBuf(d->data); |
359 | iBuffer *buf = iClob(new_Buffer()); | 257 | iBuffer *buf = iClob(new_Buffer()); |
360 | open_Buffer(buf, &d->data->data); | 258 | open_Buffer(buf, &d->data->data); |
361 | enum iDecoderType decType = wav_DecoderType; /* TODO: from MIME */ | 259 | content.type = wav_DecoderType; /* TODO: from MIME */ |
362 | if (decType == wav_DecoderType && dataSize >= 44) { | 260 | if (content.type == wav_DecoderType && dataSize >= 44) { |
363 | /* Read the RIFF/WAVE header. */ | 261 | /* Read the RIFF/WAVE header. */ |
364 | iStream *is = stream_Buffer(buf); | 262 | iStream *is = stream_Buffer(buf); |
365 | char magic[4]; | 263 | char magic[4]; |
@@ -428,8 +326,8 @@ static iContentSpec contentSpec_Player_(const iPlayer *d) { | |||
428 | } | 326 | } |
429 | } | 327 | } |
430 | else if (memcmp(magic, "data", 4) == 0) { | 328 | else if (memcmp(magic, "data", 4) == 0) { |
431 | content.wavData = (iRanges){ pos_Stream(is), pos_Stream(is) + size }; | 329 | content.dataRange = (iRanges){ pos_Stream(is), pos_Stream(is) + size }; |
432 | content.totalSamples = (uint64_t) size_Range(&content.wavData) / blockAlign; | 330 | content.totalSamples = (uint64_t) size_Range(&content.dataRange) / blockAlign; |
433 | break; | 331 | break; |
434 | } | 332 | } |
435 | else { | 333 | else { |
@@ -462,6 +360,7 @@ static void writeOutputSamples_Player_(void *plr, Uint8 *stream, int len) { | |||
462 | 360 | ||
463 | void init_Player(iPlayer *d) { | 361 | void init_Player(iPlayer *d) { |
464 | iZap(d->spec); | 362 | iZap(d->spec); |
363 | init_String(&d->mime); | ||
465 | d->device = 0; | 364 | d->device = 0; |
466 | d->decoder = NULL; | 365 | d->decoder = NULL; |
467 | d->data = new_InputBuf(); | 366 | d->data = new_InputBuf(); |
@@ -470,6 +369,7 @@ void init_Player(iPlayer *d) { | |||
470 | void deinit_Player(iPlayer *d) { | 369 | void deinit_Player(iPlayer *d) { |
471 | stop_Player(d); | 370 | stop_Player(d); |
472 | delete_InputBuf(d->data); | 371 | delete_InputBuf(d->data); |
372 | deinit_String(&d->mime); | ||
473 | } | 373 | } |
474 | 374 | ||
475 | iBool isStarted_Player(const iPlayer *d) { | 375 | iBool isStarted_Player(const iPlayer *d) { |
@@ -481,13 +381,14 @@ iBool isPaused_Player(const iPlayer *d) { | |||
481 | return SDL_GetAudioDeviceStatus(d->device) == SDL_AUDIO_PAUSED; | 381 | return SDL_GetAudioDeviceStatus(d->device) == SDL_AUDIO_PAUSED; |
482 | } | 382 | } |
483 | 383 | ||
484 | void setFormatHint_Player(iPlayer *d, const char *hint) { | 384 | void updateSourceData_Player(iPlayer *d, const iString *mimeType, const iBlock *data, |
485 | } | 385 | enum iPlayerUpdate update) { |
486 | |||
487 | void updateSourceData_Player(iPlayer *d, const iBlock *data, enum iPlayerUpdate update) { | ||
488 | /* TODO: Add MIME as argument */ | 386 | /* TODO: Add MIME as argument */ |
489 | iInputBuf *input = d->data; | 387 | iInputBuf *input = d->data; |
490 | lock_Mutex(&input->mtx); | 388 | lock_Mutex(&input->mtx); |
389 | if (mimeType) { | ||
390 | set_String(&d->mime, mimeType); | ||
391 | } | ||
491 | switch (update) { | 392 | switch (update) { |
492 | case replace_PlayerUpdate: | 393 | case replace_PlayerUpdate: |
493 | set_Block(&input->data, data); | 394 | set_Block(&input->data, data); |
@@ -515,7 +416,7 @@ iBool start_Player(iPlayer *d) { | |||
515 | if (isStarted_Player(d)) { | 416 | if (isStarted_Player(d)) { |
516 | return iFalse; | 417 | return iFalse; |
517 | } | 418 | } |
518 | iContentSpec content = contentSpec_Player_(d); | 419 | iContentSpec content = contentSpec_Player_(d); |
519 | content.output.callback = writeOutputSamples_Player_; | 420 | content.output.callback = writeOutputSamples_Player_; |
520 | content.output.userdata = d; | 421 | content.output.userdata = d; |
521 | d->device = SDL_OpenAudioDevice(NULL, SDL_FALSE /* playback */, &content.output, &d->spec, 0); | 422 | d->device = SDL_OpenAudioDevice(NULL, SDL_FALSE /* playback */, &content.output, &d->spec, 0); |
diff --git a/src/audio/player.h b/src/audio/player.h index fe6717b0..720f2d78 100644 --- a/src/audio/player.h +++ b/src/audio/player.h | |||
@@ -33,8 +33,8 @@ enum iPlayerUpdate { | |||
33 | complete_PlayerUpdate, | 33 | complete_PlayerUpdate, |
34 | }; | 34 | }; |
35 | 35 | ||
36 | void setFormatHint_Player (iPlayer *, const char *hint); | 36 | void updateSourceData_Player (iPlayer *, const iString *mimeType, const iBlock *data, |
37 | void updateSourceData_Player (iPlayer *, const iBlock *data, enum iPlayerUpdate update); | 37 | enum iPlayerUpdate update); |
38 | 38 | ||
39 | iBool start_Player (iPlayer *); | 39 | iBool start_Player (iPlayer *); |
40 | void setPaused_Player (iPlayer *, iBool isPaused); | 40 | void setPaused_Player (iPlayer *, iBool isPaused); |
diff --git a/src/audio/stb_vorbis.c b/src/audio/stb_vorbis.c new file mode 100644 index 00000000..a8cbfa6c --- /dev/null +++ b/src/audio/stb_vorbis.c | |||
@@ -0,0 +1,5563 @@ | |||
1 | // Ogg Vorbis audio decoder - v1.20 - public domain | ||
2 | // http://nothings.org/stb_vorbis/ | ||
3 | // | ||
4 | // Original version written by Sean Barrett in 2007. | ||
5 | // | ||
6 | // Originally sponsored by RAD Game Tools. Seeking implementation | ||
7 | // sponsored by Phillip Bennefall, Marc Andersen, Aaron Baker, | ||
8 | // Elias Software, Aras Pranckevicius, and Sean Barrett. | ||
9 | // | ||
10 | // LICENSE | ||
11 | // | ||
12 | // See end of file for license information. | ||
13 | // | ||
14 | // Limitations: | ||
15 | // | ||
16 | // - floor 0 not supported (used in old ogg vorbis files pre-2004) | ||
17 | // - lossless sample-truncation at beginning ignored | ||
18 | // - cannot concatenate multiple vorbis streams | ||
19 | // - sample positions are 32-bit, limiting seekable 192Khz | ||
20 | // files to around 6 hours (Ogg supports 64-bit) | ||
21 | // | ||
22 | // Feature contributors: | ||
23 | // Dougall Johnson (sample-exact seeking) | ||
24 | // | ||
25 | // Bugfix/warning contributors: | ||
26 | // Terje Mathisen Niklas Frykholm Andy Hill | ||
27 | // Casey Muratori John Bolton Gargaj | ||
28 | // Laurent Gomila Marc LeBlanc Ronny Chevalier | ||
29 | // Bernhard Wodo Evan Balster github:alxprd | ||
30 | // Tom Beaumont Ingo Leitgeb Nicolas Guillemot | ||
31 | // Phillip Bennefall Rohit Thiago Goulart | ||
32 | // github:manxorist saga musix github:infatum | ||
33 | // Timur Gagiev Maxwell Koo Peter Waller | ||
34 | // github:audinowho Dougall Johnson David Reid | ||
35 | // github:Clownacy Pedro J. Estebanez Remi Verschelde | ||
36 | // | ||
37 | // Partial history: | ||
38 | // 1.20 - 2020-07-11 - several small fixes | ||
39 | // 1.19 - 2020-02-05 - warnings | ||
40 | // 1.18 - 2020-02-02 - fix seek bugs; parse header comments; misc warnings etc. | ||
41 | // 1.17 - 2019-07-08 - fix CVE-2019-13217..CVE-2019-13223 (by ForAllSecure) | ||
42 | // 1.16 - 2019-03-04 - fix warnings | ||
43 | // 1.15 - 2019-02-07 - explicit failure if Ogg Skeleton data is found | ||
44 | // 1.14 - 2018-02-11 - delete bogus dealloca usage | ||
45 | // 1.13 - 2018-01-29 - fix truncation of last frame (hopefully) | ||
46 | // 1.12 - 2017-11-21 - limit residue begin/end to blocksize/2 to avoid large temp allocs in bad/corrupt files | ||
47 | // 1.11 - 2017-07-23 - fix MinGW compilation | ||
48 | // 1.10 - 2017-03-03 - more robust seeking; fix negative ilog(); clear error in open_memory | ||
49 | // 1.09 - 2016-04-04 - back out 'truncation of last frame' fix from previous version | ||
50 | // 1.08 - 2016-04-02 - warnings; setup memory leaks; truncation of last frame | ||
51 | // 1.07 - 2015-01-16 - fixes for crashes on invalid files; warning fixes; const | ||
52 | // 1.06 - 2015-08-31 - full, correct support for seeking API (Dougall Johnson) | ||
53 | // some crash fixes when out of memory or with corrupt files | ||
54 | // fix some inappropriately signed shifts | ||
55 | // 1.05 - 2015-04-19 - don't define __forceinline if it's redundant | ||
56 | // 1.04 - 2014-08-27 - fix missing const-correct case in API | ||
57 | // 1.03 - 2014-08-07 - warning fixes | ||
58 | // 1.02 - 2014-07-09 - declare qsort comparison as explicitly _cdecl in Windows | ||
59 | // 1.01 - 2014-06-18 - fix stb_vorbis_get_samples_float (interleaved was correct) | ||
60 | // 1.0 - 2014-05-26 - fix memory leaks; fix warnings; fix bugs in >2-channel; | ||
61 | // (API change) report sample rate for decode-full-file funcs | ||
62 | // | ||
63 | // See end of file for full version history. | ||
64 | |||
65 | |||
66 | ////////////////////////////////////////////////////////////////////////////// | ||
67 | // | ||
68 | // HEADER BEGINS HERE | ||
69 | // | ||
70 | |||
71 | #ifndef STB_VORBIS_INCLUDE_STB_VORBIS_H | ||
72 | #define STB_VORBIS_INCLUDE_STB_VORBIS_H | ||
73 | |||
74 | #if defined(STB_VORBIS_NO_CRT) && !defined(STB_VORBIS_NO_STDIO) | ||
75 | #define STB_VORBIS_NO_STDIO 1 | ||
76 | #endif | ||
77 | |||
78 | #ifndef STB_VORBIS_NO_STDIO | ||
79 | #include <stdio.h> | ||
80 | #endif | ||
81 | |||
82 | #ifdef __cplusplus | ||
83 | extern "C" { | ||
84 | #endif | ||
85 | |||
86 | /////////// THREAD SAFETY | ||
87 | |||
88 | // Individual stb_vorbis* handles are not thread-safe; you cannot decode from | ||
89 | // them from multiple threads at the same time. However, you can have multiple | ||
90 | // stb_vorbis* handles and decode from them independently in multiple thrads. | ||
91 | |||
92 | |||
93 | /////////// MEMORY ALLOCATION | ||
94 | |||
95 | // normally stb_vorbis uses malloc() to allocate memory at startup, | ||
96 | // and alloca() to allocate temporary memory during a frame on the | ||
97 | // stack. (Memory consumption will depend on the amount of setup | ||
98 | // data in the file and how you set the compile flags for speed | ||
99 | // vs. size. In my test files the maximal-size usage is ~150KB.) | ||
100 | // | ||
101 | // You can modify the wrapper functions in the source (setup_malloc, | ||
102 | // setup_temp_malloc, temp_malloc) to change this behavior, or you | ||
103 | // can use a simpler allocation model: you pass in a buffer from | ||
104 | // which stb_vorbis will allocate _all_ its memory (including the | ||
105 | // temp memory). "open" may fail with a VORBIS_outofmem if you | ||
106 | // do not pass in enough data; there is no way to determine how | ||
107 | // much you do need except to succeed (at which point you can | ||
108 | // query get_info to find the exact amount required. yes I know | ||
109 | // this is lame). | ||
110 | // | ||
111 | // If you pass in a non-NULL buffer of the type below, allocation | ||
112 | // will occur from it as described above. Otherwise just pass NULL | ||
113 | // to use malloc()/alloca() | ||
114 | |||
115 | typedef struct | ||
116 | { | ||
117 | char *alloc_buffer; | ||
118 | int alloc_buffer_length_in_bytes; | ||
119 | } stb_vorbis_alloc; | ||
120 | |||
121 | |||
122 | /////////// FUNCTIONS USEABLE WITH ALL INPUT MODES | ||
123 | |||
124 | typedef struct stb_vorbis stb_vorbis; | ||
125 | |||
126 | typedef struct | ||
127 | { | ||
128 | unsigned int sample_rate; | ||
129 | int channels; | ||
130 | |||
131 | unsigned int setup_memory_required; | ||
132 | unsigned int setup_temp_memory_required; | ||
133 | unsigned int temp_memory_required; | ||
134 | |||
135 | int max_frame_size; | ||
136 | } stb_vorbis_info; | ||
137 | |||
138 | typedef struct | ||
139 | { | ||
140 | char *vendor; | ||
141 | |||
142 | int comment_list_length; | ||
143 | char **comment_list; | ||
144 | } stb_vorbis_comment; | ||
145 | |||
146 | // get general information about the file | ||
147 | extern stb_vorbis_info stb_vorbis_get_info(stb_vorbis *f); | ||
148 | |||
149 | // get ogg comments | ||
150 | extern stb_vorbis_comment stb_vorbis_get_comment(stb_vorbis *f); | ||
151 | |||
152 | // get the last error detected (clears it, too) | ||
153 | extern int stb_vorbis_get_error(stb_vorbis *f); | ||
154 | |||
155 | // close an ogg vorbis file and free all memory in use | ||
156 | extern void stb_vorbis_close(stb_vorbis *f); | ||
157 | |||
158 | // this function returns the offset (in samples) from the beginning of the | ||
159 | // file that will be returned by the next decode, if it is known, or -1 | ||
160 | // otherwise. after a flush_pushdata() call, this may take a while before | ||
161 | // it becomes valid again. | ||
162 | // NOT WORKING YET after a seek with PULLDATA API | ||
163 | extern int stb_vorbis_get_sample_offset(stb_vorbis *f); | ||
164 | |||
165 | // returns the current seek point within the file, or offset from the beginning | ||
166 | // of the memory buffer. In pushdata mode it returns 0. | ||
167 | extern unsigned int stb_vorbis_get_file_offset(stb_vorbis *f); | ||
168 | |||
169 | /////////// PUSHDATA API | ||
170 | |||
171 | #ifndef STB_VORBIS_NO_PUSHDATA_API | ||
172 | |||
173 | // this API allows you to get blocks of data from any source and hand | ||
174 | // them to stb_vorbis. you have to buffer them; stb_vorbis will tell | ||
175 | // you how much it used, and you have to give it the rest next time; | ||
176 | // and stb_vorbis may not have enough data to work with and you will | ||
177 | // need to give it the same data again PLUS more. Note that the Vorbis | ||
178 | // specification does not bound the size of an individual frame. | ||
179 | |||
180 | extern stb_vorbis *stb_vorbis_open_pushdata( | ||
181 | const unsigned char * datablock, int datablock_length_in_bytes, | ||
182 | int *datablock_memory_consumed_in_bytes, | ||
183 | int *error, | ||
184 | const stb_vorbis_alloc *alloc_buffer); | ||
185 | // create a vorbis decoder by passing in the initial data block containing | ||
186 | // the ogg&vorbis headers (you don't need to do parse them, just provide | ||
187 | // the first N bytes of the file--you're told if it's not enough, see below) | ||
188 | // on success, returns an stb_vorbis *, does not set error, returns the amount of | ||
189 | // data parsed/consumed on this call in *datablock_memory_consumed_in_bytes; | ||
190 | // on failure, returns NULL on error and sets *error, does not change *datablock_memory_consumed | ||
191 | // if returns NULL and *error is VORBIS_need_more_data, then the input block was | ||
192 | // incomplete and you need to pass in a larger block from the start of the file | ||
193 | |||
194 | extern int stb_vorbis_decode_frame_pushdata( | ||
195 | stb_vorbis *f, | ||
196 | const unsigned char *datablock, int datablock_length_in_bytes, | ||
197 | int *channels, // place to write number of float * buffers | ||
198 | float ***output, // place to write float ** array of float * buffers | ||
199 | int *samples // place to write number of output samples | ||
200 | ); | ||
201 | // decode a frame of audio sample data if possible from the passed-in data block | ||
202 | // | ||
203 | // return value: number of bytes we used from datablock | ||
204 | // | ||
205 | // possible cases: | ||
206 | // 0 bytes used, 0 samples output (need more data) | ||
207 | // N bytes used, 0 samples output (resynching the stream, keep going) | ||
208 | // N bytes used, M samples output (one frame of data) | ||
209 | // note that after opening a file, you will ALWAYS get one N-bytes,0-sample | ||
210 | // frame, because Vorbis always "discards" the first frame. | ||
211 | // | ||
212 | // Note that on resynch, stb_vorbis will rarely consume all of the buffer, | ||
213 | // instead only datablock_length_in_bytes-3 or less. This is because it wants | ||
214 | // to avoid missing parts of a page header if they cross a datablock boundary, | ||
215 | // without writing state-machiney code to record a partial detection. | ||
216 | // | ||
217 | // The number of channels returned are stored in *channels (which can be | ||
218 | // NULL--it is always the same as the number of channels reported by | ||
219 | // get_info). *output will contain an array of float* buffers, one per | ||
220 | // channel. In other words, (*output)[0][0] contains the first sample from | ||
221 | // the first channel, and (*output)[1][0] contains the first sample from | ||
222 | // the second channel. | ||
223 | |||
224 | extern void stb_vorbis_flush_pushdata(stb_vorbis *f); | ||
225 | // inform stb_vorbis that your next datablock will not be contiguous with | ||
226 | // previous ones (e.g. you've seeked in the data); future attempts to decode | ||
227 | // frames will cause stb_vorbis to resynchronize (as noted above), and | ||
228 | // once it sees a valid Ogg page (typically 4-8KB, as large as 64KB), it | ||
229 | // will begin decoding the _next_ frame. | ||
230 | // | ||
231 | // if you want to seek using pushdata, you need to seek in your file, then | ||
232 | // call stb_vorbis_flush_pushdata(), then start calling decoding, then once | ||
233 | // decoding is returning you data, call stb_vorbis_get_sample_offset, and | ||
234 | // if you don't like the result, seek your file again and repeat. | ||
235 | #endif | ||
236 | |||
237 | |||
238 | ////////// PULLING INPUT API | ||
239 | |||
240 | #ifndef STB_VORBIS_NO_PULLDATA_API | ||
241 | // This API assumes stb_vorbis is allowed to pull data from a source-- | ||
242 | // either a block of memory containing the _entire_ vorbis stream, or a | ||
243 | // FILE * that you or it create, or possibly some other reading mechanism | ||
244 | // if you go modify the source to replace the FILE * case with some kind | ||
245 | // of callback to your code. (But if you don't support seeking, you may | ||
246 | // just want to go ahead and use pushdata.) | ||
247 | |||
248 | #if !defined(STB_VORBIS_NO_STDIO) && !defined(STB_VORBIS_NO_INTEGER_CONVERSION) | ||
249 | extern int stb_vorbis_decode_filename(const char *filename, int *channels, int *sample_rate, short **output); | ||
250 | #endif | ||
251 | #if !defined(STB_VORBIS_NO_INTEGER_CONVERSION) | ||
252 | extern int stb_vorbis_decode_memory(const unsigned char *mem, int len, int *channels, int *sample_rate, short **output); | ||
253 | #endif | ||
254 | // decode an entire file and output the data interleaved into a malloc()ed | ||
255 | // buffer stored in *output. The return value is the number of samples | ||
256 | // decoded, or -1 if the file could not be opened or was not an ogg vorbis file. | ||
257 | // When you're done with it, just free() the pointer returned in *output. | ||
258 | |||
259 | extern stb_vorbis * stb_vorbis_open_memory(const unsigned char *data, int len, | ||
260 | int *error, const stb_vorbis_alloc *alloc_buffer); | ||
261 | // create an ogg vorbis decoder from an ogg vorbis stream in memory (note | ||
262 | // this must be the entire stream!). on failure, returns NULL and sets *error | ||
263 | |||
264 | #ifndef STB_VORBIS_NO_STDIO | ||
265 | extern stb_vorbis * stb_vorbis_open_filename(const char *filename, | ||
266 | int *error, const stb_vorbis_alloc *alloc_buffer); | ||
267 | // create an ogg vorbis decoder from a filename via fopen(). on failure, | ||
268 | // returns NULL and sets *error (possibly to VORBIS_file_open_failure). | ||
269 | |||
270 | extern stb_vorbis * stb_vorbis_open_file(FILE *f, int close_handle_on_close, | ||
271 | int *error, const stb_vorbis_alloc *alloc_buffer); | ||
272 | // create an ogg vorbis decoder from an open FILE *, looking for a stream at | ||
273 | // the _current_ seek point (ftell). on failure, returns NULL and sets *error. | ||
274 | // note that stb_vorbis must "own" this stream; if you seek it in between | ||
275 | // calls to stb_vorbis, it will become confused. Moreover, if you attempt to | ||
276 | // perform stb_vorbis_seek_*() operations on this file, it will assume it | ||
277 | // owns the _entire_ rest of the file after the start point. Use the next | ||
278 | // function, stb_vorbis_open_file_section(), to limit it. | ||
279 | |||
280 | extern stb_vorbis * stb_vorbis_open_file_section(FILE *f, int close_handle_on_close, | ||
281 | int *error, const stb_vorbis_alloc *alloc_buffer, unsigned int len); | ||
282 | // create an ogg vorbis decoder from an open FILE *, looking for a stream at | ||
283 | // the _current_ seek point (ftell); the stream will be of length 'len' bytes. | ||
284 | // on failure, returns NULL and sets *error. note that stb_vorbis must "own" | ||
285 | // this stream; if you seek it in between calls to stb_vorbis, it will become | ||
286 | // confused. | ||
287 | #endif | ||
288 | |||
289 | extern int stb_vorbis_seek_frame(stb_vorbis *f, unsigned int sample_number); | ||
290 | extern int stb_vorbis_seek(stb_vorbis *f, unsigned int sample_number); | ||
291 | // these functions seek in the Vorbis file to (approximately) 'sample_number'. | ||
292 | // after calling seek_frame(), the next call to get_frame_*() will include | ||
293 | // the specified sample. after calling stb_vorbis_seek(), the next call to | ||
294 | // stb_vorbis_get_samples_* will start with the specified sample. If you | ||
295 | // do not need to seek to EXACTLY the target sample when using get_samples_*, | ||
296 | // you can also use seek_frame(). | ||
297 | |||
298 | extern int stb_vorbis_seek_start(stb_vorbis *f); | ||
299 | // this function is equivalent to stb_vorbis_seek(f,0) | ||
300 | |||
301 | extern unsigned int stb_vorbis_stream_length_in_samples(stb_vorbis *f); | ||
302 | extern float stb_vorbis_stream_length_in_seconds(stb_vorbis *f); | ||
303 | // these functions return the total length of the vorbis stream | ||
304 | |||
305 | extern int stb_vorbis_get_frame_float(stb_vorbis *f, int *channels, float ***output); | ||
306 | // decode the next frame and return the number of samples. the number of | ||
307 | // channels returned are stored in *channels (which can be NULL--it is always | ||
308 | // the same as the number of channels reported by get_info). *output will | ||
309 | // contain an array of float* buffers, one per channel. These outputs will | ||
310 | // be overwritten on the next call to stb_vorbis_get_frame_*. | ||
311 | // | ||
312 | // You generally should not intermix calls to stb_vorbis_get_frame_*() | ||
313 | // and stb_vorbis_get_samples_*(), since the latter calls the former. | ||
314 | |||
315 | #ifndef STB_VORBIS_NO_INTEGER_CONVERSION | ||
316 | extern int stb_vorbis_get_frame_short_interleaved(stb_vorbis *f, int num_c, short *buffer, int num_shorts); | ||
317 | extern int stb_vorbis_get_frame_short (stb_vorbis *f, int num_c, short **buffer, int num_samples); | ||
318 | #endif | ||
319 | // decode the next frame and return the number of *samples* per channel. | ||
320 | // Note that for interleaved data, you pass in the number of shorts (the | ||
321 | // size of your array), but the return value is the number of samples per | ||
322 | // channel, not the total number of samples. | ||
323 | // | ||
324 | // The data is coerced to the number of channels you request according to the | ||
325 | // channel coercion rules (see below). You must pass in the size of your | ||
326 | // buffer(s) so that stb_vorbis will not overwrite the end of the buffer. | ||
327 | // The maximum buffer size needed can be gotten from get_info(); however, | ||
328 | // the Vorbis I specification implies an absolute maximum of 4096 samples | ||
329 | // per channel. | ||
330 | |||
331 | // Channel coercion rules: | ||
332 | // Let M be the number of channels requested, and N the number of channels present, | ||
333 | // and Cn be the nth channel; let stereo L be the sum of all L and center channels, | ||
334 | // and stereo R be the sum of all R and center channels (channel assignment from the | ||
335 | // vorbis spec). | ||
336 | // M N output | ||
337 | // 1 k sum(Ck) for all k | ||
338 | // 2 * stereo L, stereo R | ||
339 | // k l k > l, the first l channels, then 0s | ||
340 | // k l k <= l, the first k channels | ||
341 | // Note that this is not _good_ surround etc. mixing at all! It's just so | ||
342 | // you get something useful. | ||
343 | |||
344 | extern int stb_vorbis_get_samples_float_interleaved(stb_vorbis *f, int channels, float *buffer, int num_floats); | ||
345 | extern int stb_vorbis_get_samples_float(stb_vorbis *f, int channels, float **buffer, int num_samples); | ||
346 | // gets num_samples samples, not necessarily on a frame boundary--this requires | ||
347 | // buffering so you have to supply the buffers. DOES NOT APPLY THE COERCION RULES. | ||
348 | // Returns the number of samples stored per channel; it may be less than requested | ||
349 | // at the end of the file. If there are no more samples in the file, returns 0. | ||
350 | |||
351 | #ifndef STB_VORBIS_NO_INTEGER_CONVERSION | ||
352 | extern int stb_vorbis_get_samples_short_interleaved(stb_vorbis *f, int channels, short *buffer, int num_shorts); | ||
353 | extern int stb_vorbis_get_samples_short(stb_vorbis *f, int channels, short **buffer, int num_samples); | ||
354 | #endif | ||
355 | // gets num_samples samples, not necessarily on a frame boundary--this requires | ||
356 | // buffering so you have to supply the buffers. Applies the coercion rules above | ||
357 | // to produce 'channels' channels. Returns the number of samples stored per channel; | ||
358 | // it may be less than requested at the end of the file. If there are no more | ||
359 | // samples in the file, returns 0. | ||
360 | |||
361 | #endif | ||
362 | |||
363 | //////// ERROR CODES | ||
364 | |||
365 | enum STBVorbisError | ||
366 | { | ||
367 | VORBIS__no_error, | ||
368 | |||
369 | VORBIS_need_more_data=1, // not a real error | ||
370 | |||
371 | VORBIS_invalid_api_mixing, // can't mix API modes | ||
372 | VORBIS_outofmem, // not enough memory | ||
373 | VORBIS_feature_not_supported, // uses floor 0 | ||
374 | VORBIS_too_many_channels, // STB_VORBIS_MAX_CHANNELS is too small | ||
375 | VORBIS_file_open_failure, // fopen() failed | ||
376 | VORBIS_seek_without_length, // can't seek in unknown-length file | ||
377 | |||
378 | VORBIS_unexpected_eof=10, // file is truncated? | ||
379 | VORBIS_seek_invalid, // seek past EOF | ||
380 | |||
381 | // decoding errors (corrupt/invalid stream) -- you probably | ||
382 | // don't care about the exact details of these | ||
383 | |||
384 | // vorbis errors: | ||
385 | VORBIS_invalid_setup=20, | ||
386 | VORBIS_invalid_stream, | ||
387 | |||
388 | // ogg errors: | ||
389 | VORBIS_missing_capture_pattern=30, | ||
390 | VORBIS_invalid_stream_structure_version, | ||
391 | VORBIS_continued_packet_flag_invalid, | ||
392 | VORBIS_incorrect_stream_serial_number, | ||
393 | VORBIS_invalid_first_page, | ||
394 | VORBIS_bad_packet_type, | ||
395 | VORBIS_cant_find_last_page, | ||
396 | VORBIS_seek_failed, | ||
397 | VORBIS_ogg_skeleton_not_supported | ||
398 | }; | ||
399 | |||
400 | |||
401 | #ifdef __cplusplus | ||
402 | } | ||
403 | #endif | ||
404 | |||
405 | #endif // STB_VORBIS_INCLUDE_STB_VORBIS_H | ||
406 | // | ||
407 | // HEADER ENDS HERE | ||
408 | // | ||
409 | ////////////////////////////////////////////////////////////////////////////// | ||
410 | |||
411 | #ifndef STB_VORBIS_HEADER_ONLY | ||
412 | |||
413 | // global configuration settings (e.g. set these in the project/makefile), | ||
414 | // or just set them in this file at the top (although ideally the first few | ||
415 | // should be visible when the header file is compiled too, although it's not | ||
416 | // crucial) | ||
417 | |||
418 | // STB_VORBIS_NO_PUSHDATA_API | ||
419 | // does not compile the code for the various stb_vorbis_*_pushdata() | ||
420 | // functions | ||
421 | // #define STB_VORBIS_NO_PUSHDATA_API | ||
422 | |||
423 | // STB_VORBIS_NO_PULLDATA_API | ||
424 | // does not compile the code for the non-pushdata APIs | ||
425 | // #define STB_VORBIS_NO_PULLDATA_API | ||
426 | |||
427 | // STB_VORBIS_NO_STDIO | ||
428 | // does not compile the code for the APIs that use FILE *s internally | ||
429 | // or externally (implied by STB_VORBIS_NO_PULLDATA_API) | ||
430 | // #define STB_VORBIS_NO_STDIO | ||
431 | |||
432 | // STB_VORBIS_NO_INTEGER_CONVERSION | ||
433 | // does not compile the code for converting audio sample data from | ||
434 | // float to integer (implied by STB_VORBIS_NO_PULLDATA_API) | ||
435 | // #define STB_VORBIS_NO_INTEGER_CONVERSION | ||
436 | |||
437 | // STB_VORBIS_NO_FAST_SCALED_FLOAT | ||
438 | // does not use a fast float-to-int trick to accelerate float-to-int on | ||
439 | // most platforms which requires endianness be defined correctly. | ||
440 | //#define STB_VORBIS_NO_FAST_SCALED_FLOAT | ||
441 | |||
442 | |||
443 | // STB_VORBIS_MAX_CHANNELS [number] | ||
444 | // globally define this to the maximum number of channels you need. | ||
445 | // The spec does not put a restriction on channels except that | ||
446 | // the count is stored in a byte, so 255 is the hard limit. | ||
447 | // Reducing this saves about 16 bytes per value, so using 16 saves | ||
448 | // (255-16)*16 or around 4KB. Plus anything other memory usage | ||
449 | // I forgot to account for. Can probably go as low as 8 (7.1 audio), | ||
450 | // 6 (5.1 audio), or 2 (stereo only). | ||
451 | #ifndef STB_VORBIS_MAX_CHANNELS | ||
452 | #define STB_VORBIS_MAX_CHANNELS 16 // enough for anyone? | ||
453 | #endif | ||
454 | |||
455 | // STB_VORBIS_PUSHDATA_CRC_COUNT [number] | ||
456 | // after a flush_pushdata(), stb_vorbis begins scanning for the | ||
457 | // next valid page, without backtracking. when it finds something | ||
458 | // that looks like a page, it streams through it and verifies its | ||
459 | // CRC32. Should that validation fail, it keeps scanning. But it's | ||
460 | // possible that _while_ streaming through to check the CRC32 of | ||
461 | // one candidate page, it sees another candidate page. This #define | ||
462 | // determines how many "overlapping" candidate pages it can search | ||
463 | // at once. Note that "real" pages are typically ~4KB to ~8KB, whereas | ||
464 | // garbage pages could be as big as 64KB, but probably average ~16KB. | ||
465 | // So don't hose ourselves by scanning an apparent 64KB page and | ||
466 | // missing a ton of real ones in the interim; so minimum of 2 | ||
467 | #ifndef STB_VORBIS_PUSHDATA_CRC_COUNT | ||
468 | #define STB_VORBIS_PUSHDATA_CRC_COUNT 4 | ||
469 | #endif | ||
470 | |||
471 | // STB_VORBIS_FAST_HUFFMAN_LENGTH [number] | ||
472 | // sets the log size of the huffman-acceleration table. Maximum | ||
473 | // supported value is 24. with larger numbers, more decodings are O(1), | ||
474 | // but the table size is larger so worse cache missing, so you'll have | ||
475 | // to probe (and try multiple ogg vorbis files) to find the sweet spot. | ||
476 | #ifndef STB_VORBIS_FAST_HUFFMAN_LENGTH | ||
477 | #define STB_VORBIS_FAST_HUFFMAN_LENGTH 10 | ||
478 | #endif | ||
479 | |||
480 | // STB_VORBIS_FAST_BINARY_LENGTH [number] | ||
481 | // sets the log size of the binary-search acceleration table. this | ||
482 | // is used in similar fashion to the fast-huffman size to set initial | ||
483 | // parameters for the binary search | ||
484 | |||
485 | // STB_VORBIS_FAST_HUFFMAN_INT | ||
486 | // The fast huffman tables are much more efficient if they can be | ||
487 | // stored as 16-bit results instead of 32-bit results. This restricts | ||
488 | // the codebooks to having only 65535 possible outcomes, though. | ||
489 | // (At least, accelerated by the huffman table.) | ||
490 | #ifndef STB_VORBIS_FAST_HUFFMAN_INT | ||
491 | #define STB_VORBIS_FAST_HUFFMAN_SHORT | ||
492 | #endif | ||
493 | |||
494 | // STB_VORBIS_NO_HUFFMAN_BINARY_SEARCH | ||
495 | // If the 'fast huffman' search doesn't succeed, then stb_vorbis falls | ||
496 | // back on binary searching for the correct one. This requires storing | ||
497 | // extra tables with the huffman codes in sorted order. Defining this | ||
498 | // symbol trades off space for speed by forcing a linear search in the | ||
499 | // non-fast case, except for "sparse" codebooks. | ||
500 | // #define STB_VORBIS_NO_HUFFMAN_BINARY_SEARCH | ||
501 | |||
502 | // STB_VORBIS_DIVIDES_IN_RESIDUE | ||
503 | // stb_vorbis precomputes the result of the scalar residue decoding | ||
504 | // that would otherwise require a divide per chunk. you can trade off | ||
505 | // space for time by defining this symbol. | ||
506 | // #define STB_VORBIS_DIVIDES_IN_RESIDUE | ||
507 | |||
508 | // STB_VORBIS_DIVIDES_IN_CODEBOOK | ||
509 | // vorbis VQ codebooks can be encoded two ways: with every case explicitly | ||
510 | // stored, or with all elements being chosen from a small range of values, | ||
511 | // and all values possible in all elements. By default, stb_vorbis expands | ||
512 | // this latter kind out to look like the former kind for ease of decoding, | ||
513 | // because otherwise an integer divide-per-vector-element is required to | ||
514 | // unpack the index. If you define STB_VORBIS_DIVIDES_IN_CODEBOOK, you can | ||
515 | // trade off storage for speed. | ||
516 | //#define STB_VORBIS_DIVIDES_IN_CODEBOOK | ||
517 | |||
518 | #ifdef STB_VORBIS_CODEBOOK_SHORTS | ||
519 | #error "STB_VORBIS_CODEBOOK_SHORTS is no longer supported as it produced incorrect results for some input formats" | ||
520 | #endif | ||
521 | |||
522 | // STB_VORBIS_DIVIDE_TABLE | ||
523 | // this replaces small integer divides in the floor decode loop with | ||
524 | // table lookups. made less than 1% difference, so disabled by default. | ||
525 | |||
526 | // STB_VORBIS_NO_INLINE_DECODE | ||
527 | // disables the inlining of the scalar codebook fast-huffman decode. | ||
528 | // might save a little codespace; useful for debugging | ||
529 | // #define STB_VORBIS_NO_INLINE_DECODE | ||
530 | |||
531 | // STB_VORBIS_NO_DEFER_FLOOR | ||
532 | // Normally we only decode the floor without synthesizing the actual | ||
533 | // full curve. We can instead synthesize the curve immediately. This | ||
534 | // requires more memory and is very likely slower, so I don't think | ||
535 | // you'd ever want to do it except for debugging. | ||
536 | // #define STB_VORBIS_NO_DEFER_FLOOR | ||
537 | |||
538 | |||
539 | |||
540 | |||
541 | ////////////////////////////////////////////////////////////////////////////// | ||
542 | |||
543 | #ifdef STB_VORBIS_NO_PULLDATA_API | ||
544 | #define STB_VORBIS_NO_INTEGER_CONVERSION | ||
545 | #define STB_VORBIS_NO_STDIO | ||
546 | #endif | ||
547 | |||
548 | #if defined(STB_VORBIS_NO_CRT) && !defined(STB_VORBIS_NO_STDIO) | ||
549 | #define STB_VORBIS_NO_STDIO 1 | ||
550 | #endif | ||
551 | |||
552 | #ifndef STB_VORBIS_NO_INTEGER_CONVERSION | ||
553 | #ifndef STB_VORBIS_NO_FAST_SCALED_FLOAT | ||
554 | |||
555 | // only need endianness for fast-float-to-int, which we don't | ||
556 | // use for pushdata | ||
557 | |||
558 | #ifndef STB_VORBIS_BIG_ENDIAN | ||
559 | #define STB_VORBIS_ENDIAN 0 | ||
560 | #else | ||
561 | #define STB_VORBIS_ENDIAN 1 | ||
562 | #endif | ||
563 | |||
564 | #endif | ||
565 | #endif | ||
566 | |||
567 | |||
568 | #ifndef STB_VORBIS_NO_STDIO | ||
569 | #include <stdio.h> | ||
570 | #endif | ||
571 | |||
572 | #ifndef STB_VORBIS_NO_CRT | ||
573 | #include <stdlib.h> | ||
574 | #include <string.h> | ||
575 | #include <assert.h> | ||
576 | #include <math.h> | ||
577 | |||
578 | // find definition of alloca if it's not in stdlib.h: | ||
579 | #if defined(_MSC_VER) || defined(__MINGW32__) | ||
580 | #include <malloc.h> | ||
581 | #endif | ||
582 | #if defined(__linux__) || defined(__linux) || defined(__EMSCRIPTEN__) || defined(__NEWLIB__) | ||
583 | #include <alloca.h> | ||
584 | #endif | ||
585 | #else // STB_VORBIS_NO_CRT | ||
586 | #define NULL 0 | ||
587 | #define malloc(s) 0 | ||
588 | #define free(s) ((void) 0) | ||
589 | #define realloc(s) 0 | ||
590 | #endif // STB_VORBIS_NO_CRT | ||
591 | |||
592 | #include <limits.h> | ||
593 | |||
594 | #ifdef __MINGW32__ | ||
595 | // eff you mingw: | ||
596 | // "fixed": | ||
597 | // http://sourceforge.net/p/mingw-w64/mailman/message/32882927/ | ||
598 | // "no that broke the build, reverted, who cares about C": | ||
599 | // http://sourceforge.net/p/mingw-w64/mailman/message/32890381/ | ||
600 | #ifdef __forceinline | ||
601 | #undef __forceinline | ||
602 | #endif | ||
603 | #define __forceinline | ||
604 | #ifndef alloca | ||
605 | #define alloca __builtin_alloca | ||
606 | #endif | ||
607 | #elif !defined(_MSC_VER) | ||
608 | #if __GNUC__ | ||
609 | #define __forceinline inline | ||
610 | #else | ||
611 | #define __forceinline | ||
612 | #endif | ||
613 | #endif | ||
614 | |||
615 | #if STB_VORBIS_MAX_CHANNELS > 256 | ||
616 | #error "Value of STB_VORBIS_MAX_CHANNELS outside of allowed range" | ||
617 | #endif | ||
618 | |||
619 | #if STB_VORBIS_FAST_HUFFMAN_LENGTH > 24 | ||
620 | #error "Value of STB_VORBIS_FAST_HUFFMAN_LENGTH outside of allowed range" | ||
621 | #endif | ||
622 | |||
623 | |||
624 | #if 0 | ||
625 | #include <crtdbg.h> | ||
626 | #define CHECK(f) _CrtIsValidHeapPointer(f->channel_buffers[1]) | ||
627 | #else | ||
628 | #define CHECK(f) ((void) 0) | ||
629 | #endif | ||
630 | |||
631 | #define MAX_BLOCKSIZE_LOG 13 // from specification | ||
632 | #define MAX_BLOCKSIZE (1 << MAX_BLOCKSIZE_LOG) | ||
633 | |||
634 | |||
635 | typedef unsigned char uint8; | ||
636 | typedef signed char int8; | ||
637 | typedef unsigned short uint16; | ||
638 | typedef signed short int16; | ||
639 | typedef unsigned int uint32; | ||
640 | typedef signed int int32; | ||
641 | |||
642 | #ifndef TRUE | ||
643 | #define TRUE 1 | ||
644 | #define FALSE 0 | ||
645 | #endif | ||
646 | |||
647 | typedef float codetype; | ||
648 | |||
649 | // @NOTE | ||
650 | // | ||
651 | // Some arrays below are tagged "//varies", which means it's actually | ||
652 | // a variable-sized piece of data, but rather than malloc I assume it's | ||
653 | // small enough it's better to just allocate it all together with the | ||
654 | // main thing | ||
655 | // | ||
656 | // Most of the variables are specified with the smallest size I could pack | ||
657 | // them into. It might give better performance to make them all full-sized | ||
658 | // integers. It should be safe to freely rearrange the structures or change | ||
659 | // the sizes larger--nothing relies on silently truncating etc., nor the | ||
660 | // order of variables. | ||
661 | |||
662 | #define FAST_HUFFMAN_TABLE_SIZE (1 << STB_VORBIS_FAST_HUFFMAN_LENGTH) | ||
663 | #define FAST_HUFFMAN_TABLE_MASK (FAST_HUFFMAN_TABLE_SIZE - 1) | ||
664 | |||
665 | typedef struct | ||
666 | { | ||
667 | int dimensions, entries; | ||
668 | uint8 *codeword_lengths; | ||
669 | float minimum_value; | ||
670 | float delta_value; | ||
671 | uint8 value_bits; | ||
672 | uint8 lookup_type; | ||
673 | uint8 sequence_p; | ||
674 | uint8 sparse; | ||
675 | uint32 lookup_values; | ||
676 | codetype *multiplicands; | ||
677 | uint32 *codewords; | ||
678 | #ifdef STB_VORBIS_FAST_HUFFMAN_SHORT | ||
679 | int16 fast_huffman[FAST_HUFFMAN_TABLE_SIZE]; | ||
680 | #else | ||
681 | int32 fast_huffman[FAST_HUFFMAN_TABLE_SIZE]; | ||
682 | #endif | ||
683 | uint32 *sorted_codewords; | ||
684 | int *sorted_values; | ||
685 | int sorted_entries; | ||
686 | } Codebook; | ||
687 | |||
688 | typedef struct | ||
689 | { | ||
690 | uint8 order; | ||
691 | uint16 rate; | ||
692 | uint16 bark_map_size; | ||
693 | uint8 amplitude_bits; | ||
694 | uint8 amplitude_offset; | ||
695 | uint8 number_of_books; | ||
696 | uint8 book_list[16]; // varies | ||
697 | } Floor0; | ||
698 | |||
699 | typedef struct | ||
700 | { | ||
701 | uint8 partitions; | ||
702 | uint8 partition_class_list[32]; // varies | ||
703 | uint8 class_dimensions[16]; // varies | ||
704 | uint8 class_subclasses[16]; // varies | ||
705 | uint8 class_masterbooks[16]; // varies | ||
706 | int16 subclass_books[16][8]; // varies | ||
707 | uint16 Xlist[31*8+2]; // varies | ||
708 | uint8 sorted_order[31*8+2]; | ||
709 | uint8 neighbors[31*8+2][2]; | ||
710 | uint8 floor1_multiplier; | ||
711 | uint8 rangebits; | ||
712 | int values; | ||
713 | } Floor1; | ||
714 | |||
715 | typedef union | ||
716 | { | ||
717 | Floor0 floor0; | ||
718 | Floor1 floor1; | ||
719 | } Floor; | ||
720 | |||
721 | typedef struct | ||
722 | { | ||
723 | uint32 begin, end; | ||
724 | uint32 part_size; | ||
725 | uint8 classifications; | ||
726 | uint8 classbook; | ||
727 | uint8 **classdata; | ||
728 | int16 (*residue_books)[8]; | ||
729 | } Residue; | ||
730 | |||
731 | typedef struct | ||
732 | { | ||
733 | uint8 magnitude; | ||
734 | uint8 angle; | ||
735 | uint8 mux; | ||
736 | } MappingChannel; | ||
737 | |||
738 | typedef struct | ||
739 | { | ||
740 | uint16 coupling_steps; | ||
741 | MappingChannel *chan; | ||
742 | uint8 submaps; | ||
743 | uint8 submap_floor[15]; // varies | ||
744 | uint8 submap_residue[15]; // varies | ||
745 | } Mapping; | ||
746 | |||
747 | typedef struct | ||
748 | { | ||
749 | uint8 blockflag; | ||
750 | uint8 mapping; | ||
751 | uint16 windowtype; | ||
752 | uint16 transformtype; | ||
753 | } Mode; | ||
754 | |||
755 | typedef struct | ||
756 | { | ||
757 | uint32 goal_crc; // expected crc if match | ||
758 | int bytes_left; // bytes left in packet | ||
759 | uint32 crc_so_far; // running crc | ||
760 | int bytes_done; // bytes processed in _current_ chunk | ||
761 | uint32 sample_loc; // granule pos encoded in page | ||
762 | } CRCscan; | ||
763 | |||
764 | typedef struct | ||
765 | { | ||
766 | uint32 page_start, page_end; | ||
767 | uint32 last_decoded_sample; | ||
768 | } ProbedPage; | ||
769 | |||
770 | struct stb_vorbis | ||
771 | { | ||
772 | // user-accessible info | ||
773 | unsigned int sample_rate; | ||
774 | int channels; | ||
775 | |||
776 | unsigned int setup_memory_required; | ||
777 | unsigned int temp_memory_required; | ||
778 | unsigned int setup_temp_memory_required; | ||
779 | |||
780 | char *vendor; | ||
781 | int comment_list_length; | ||
782 | char **comment_list; | ||
783 | |||
784 | // input config | ||
785 | #ifndef STB_VORBIS_NO_STDIO | ||
786 | FILE *f; | ||
787 | uint32 f_start; | ||
788 | int close_on_free; | ||
789 | #endif | ||
790 | |||
791 | uint8 *stream; | ||
792 | uint8 *stream_start; | ||
793 | uint8 *stream_end; | ||
794 | |||
795 | uint32 stream_len; | ||
796 | |||
797 | uint8 push_mode; | ||
798 | |||
799 | // the page to seek to when seeking to start, may be zero | ||
800 | uint32 first_audio_page_offset; | ||
801 | |||
802 | // p_first is the page on which the first audio packet ends | ||
803 | // (but not necessarily the page on which it starts) | ||
804 | ProbedPage p_first, p_last; | ||
805 | |||
806 | // memory management | ||
807 | stb_vorbis_alloc alloc; | ||
808 | int setup_offset; | ||
809 | int temp_offset; | ||
810 | |||
811 | // run-time results | ||
812 | int eof; | ||
813 | enum STBVorbisError error; | ||
814 | |||
815 | // user-useful data | ||
816 | |||
817 | // header info | ||
818 | int blocksize[2]; | ||
819 | int blocksize_0, blocksize_1; | ||
820 | int codebook_count; | ||
821 | Codebook *codebooks; | ||
822 | int floor_count; | ||
823 | uint16 floor_types[64]; // varies | ||
824 | Floor *floor_config; | ||
825 | int residue_count; | ||
826 | uint16 residue_types[64]; // varies | ||
827 | Residue *residue_config; | ||
828 | int mapping_count; | ||
829 | Mapping *mapping; | ||
830 | int mode_count; | ||
831 | Mode mode_config[64]; // varies | ||
832 | |||
833 | uint32 total_samples; | ||
834 | |||
835 | // decode buffer | ||
836 | float *channel_buffers[STB_VORBIS_MAX_CHANNELS]; | ||
837 | float *outputs [STB_VORBIS_MAX_CHANNELS]; | ||
838 | |||
839 | float *previous_window[STB_VORBIS_MAX_CHANNELS]; | ||
840 | int previous_length; | ||
841 | |||
842 | #ifndef STB_VORBIS_NO_DEFER_FLOOR | ||
843 | int16 *finalY[STB_VORBIS_MAX_CHANNELS]; | ||
844 | #else | ||
845 | float *floor_buffers[STB_VORBIS_MAX_CHANNELS]; | ||
846 | #endif | ||
847 | |||
848 | uint32 current_loc; // sample location of next frame to decode | ||
849 | int current_loc_valid; | ||
850 | |||
851 | // per-blocksize precomputed data | ||
852 | |||
853 | // twiddle factors | ||
854 | float *A[2],*B[2],*C[2]; | ||
855 | float *window[2]; | ||
856 | uint16 *bit_reverse[2]; | ||
857 | |||
858 | // current page/packet/segment streaming info | ||
859 | uint32 serial; // stream serial number for verification | ||
860 | int last_page; | ||
861 | int segment_count; | ||
862 | uint8 segments[255]; | ||
863 | uint8 page_flag; | ||
864 | uint8 bytes_in_seg; | ||
865 | uint8 first_decode; | ||
866 | int next_seg; | ||
867 | int last_seg; // flag that we're on the last segment | ||
868 | int last_seg_which; // what was the segment number of the last seg? | ||
869 | uint32 acc; | ||
870 | int valid_bits; | ||
871 | int packet_bytes; | ||
872 | int end_seg_with_known_loc; | ||
873 | uint32 known_loc_for_packet; | ||
874 | int discard_samples_deferred; | ||
875 | uint32 samples_output; | ||
876 | |||
877 | // push mode scanning | ||
878 | int page_crc_tests; // only in push_mode: number of tests active; -1 if not searching | ||
879 | #ifndef STB_VORBIS_NO_PUSHDATA_API | ||
880 | CRCscan scan[STB_VORBIS_PUSHDATA_CRC_COUNT]; | ||
881 | #endif | ||
882 | |||
883 | // sample-access | ||
884 | int channel_buffer_start; | ||
885 | int channel_buffer_end; | ||
886 | }; | ||
887 | |||
888 | #if defined(STB_VORBIS_NO_PUSHDATA_API) | ||
889 | #define IS_PUSH_MODE(f) FALSE | ||
890 | #elif defined(STB_VORBIS_NO_PULLDATA_API) | ||
891 | #define IS_PUSH_MODE(f) TRUE | ||
892 | #else | ||
893 | #define IS_PUSH_MODE(f) ((f)->push_mode) | ||
894 | #endif | ||
895 | |||
896 | typedef struct stb_vorbis vorb; | ||
897 | |||
898 | static int error(vorb *f, enum STBVorbisError e) | ||
899 | { | ||
900 | f->error = e; | ||
901 | if (!f->eof && e != VORBIS_need_more_data) { | ||
902 | f->error=e; // breakpoint for debugging | ||
903 | } | ||
904 | return 0; | ||
905 | } | ||
906 | |||
907 | |||
908 | // these functions are used for allocating temporary memory | ||
909 | // while decoding. if you can afford the stack space, use | ||
910 | // alloca(); otherwise, provide a temp buffer and it will | ||
911 | // allocate out of those. | ||
912 | |||
913 | #define array_size_required(count,size) (count*(sizeof(void *)+(size))) | ||
914 | |||
915 | #define temp_alloc(f,size) (f->alloc.alloc_buffer ? setup_temp_malloc(f,size) : alloca(size)) | ||
916 | #define temp_free(f,p) (void)0 | ||
917 | #define temp_alloc_save(f) ((f)->temp_offset) | ||
918 | #define temp_alloc_restore(f,p) ((f)->temp_offset = (p)) | ||
919 | |||
920 | #define temp_block_array(f,count,size) make_block_array(temp_alloc(f,array_size_required(count,size)), count, size) | ||
921 | |||
922 | // given a sufficiently large block of memory, make an array of pointers to subblocks of it | ||
923 | static void *make_block_array(void *mem, int count, int size) | ||
924 | { | ||
925 | int i; | ||
926 | void ** p = (void **) mem; | ||
927 | char *q = (char *) (p + count); | ||
928 | for (i=0; i < count; ++i) { | ||
929 | p[i] = q; | ||
930 | q += size; | ||
931 | } | ||
932 | return p; | ||
933 | } | ||
934 | |||
935 | static void *setup_malloc(vorb *f, int sz) | ||
936 | { | ||
937 | sz = (sz+7) & ~7; // round up to nearest 8 for alignment of future allocs. | ||
938 | f->setup_memory_required += sz; | ||
939 | if (f->alloc.alloc_buffer) { | ||
940 | void *p = (char *) f->alloc.alloc_buffer + f->setup_offset; | ||
941 | if (f->setup_offset + sz > f->temp_offset) return NULL; | ||
942 | f->setup_offset += sz; | ||
943 | return p; | ||
944 | } | ||
945 | return sz ? malloc(sz) : NULL; | ||
946 | } | ||
947 | |||
948 | static void setup_free(vorb *f, void *p) | ||
949 | { | ||
950 | if (f->alloc.alloc_buffer) return; // do nothing; setup mem is a stack | ||
951 | free(p); | ||
952 | } | ||
953 | |||
954 | static void *setup_temp_malloc(vorb *f, int sz) | ||
955 | { | ||
956 | sz = (sz+7) & ~7; // round up to nearest 8 for alignment of future allocs. | ||
957 | if (f->alloc.alloc_buffer) { | ||
958 | if (f->temp_offset - sz < f->setup_offset) return NULL; | ||
959 | f->temp_offset -= sz; | ||
960 | return (char *) f->alloc.alloc_buffer + f->temp_offset; | ||
961 | } | ||
962 | return malloc(sz); | ||
963 | } | ||
964 | |||
965 | static void setup_temp_free(vorb *f, void *p, int sz) | ||
966 | { | ||
967 | if (f->alloc.alloc_buffer) { | ||
968 | f->temp_offset += (sz+7)&~7; | ||
969 | return; | ||
970 | } | ||
971 | free(p); | ||
972 | } | ||
973 | |||
974 | #define CRC32_POLY 0x04c11db7 // from spec | ||
975 | |||
976 | static uint32 crc_table[256]; | ||
977 | static void crc32_init(void) | ||
978 | { | ||
979 | int i,j; | ||
980 | uint32 s; | ||
981 | for(i=0; i < 256; i++) { | ||
982 | for (s=(uint32) i << 24, j=0; j < 8; ++j) | ||
983 | s = (s << 1) ^ (s >= (1U<<31) ? CRC32_POLY : 0); | ||
984 | crc_table[i] = s; | ||
985 | } | ||
986 | } | ||
987 | |||
988 | static __forceinline uint32 crc32_update(uint32 crc, uint8 byte) | ||
989 | { | ||
990 | return (crc << 8) ^ crc_table[byte ^ (crc >> 24)]; | ||
991 | } | ||
992 | |||
993 | |||
994 | // used in setup, and for huffman that doesn't go fast path | ||
995 | static unsigned int bit_reverse(unsigned int n) | ||
996 | { | ||
997 | n = ((n & 0xAAAAAAAA) >> 1) | ((n & 0x55555555) << 1); | ||
998 | n = ((n & 0xCCCCCCCC) >> 2) | ((n & 0x33333333) << 2); | ||
999 | n = ((n & 0xF0F0F0F0) >> 4) | ((n & 0x0F0F0F0F) << 4); | ||
1000 | n = ((n & 0xFF00FF00) >> 8) | ((n & 0x00FF00FF) << 8); | ||
1001 | return (n >> 16) | (n << 16); | ||
1002 | } | ||
1003 | |||
1004 | static float square(float x) | ||
1005 | { | ||
1006 | return x*x; | ||
1007 | } | ||
1008 | |||
1009 | // this is a weird definition of log2() for which log2(1) = 1, log2(2) = 2, log2(4) = 3 | ||
1010 | // as required by the specification. fast(?) implementation from stb.h | ||
1011 | // @OPTIMIZE: called multiple times per-packet with "constants"; move to setup | ||
1012 | static int ilog(int32 n) | ||
1013 | { | ||
1014 | static signed char log2_4[16] = { 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4 }; | ||
1015 | |||
1016 | if (n < 0) return 0; // signed n returns 0 | ||
1017 | |||
1018 | // 2 compares if n < 16, 3 compares otherwise (4 if signed or n > 1<<29) | ||
1019 | if (n < (1 << 14)) | ||
1020 | if (n < (1 << 4)) return 0 + log2_4[n ]; | ||
1021 | else if (n < (1 << 9)) return 5 + log2_4[n >> 5]; | ||
1022 | else return 10 + log2_4[n >> 10]; | ||
1023 | else if (n < (1 << 24)) | ||
1024 | if (n < (1 << 19)) return 15 + log2_4[n >> 15]; | ||
1025 | else return 20 + log2_4[n >> 20]; | ||
1026 | else if (n < (1 << 29)) return 25 + log2_4[n >> 25]; | ||
1027 | else return 30 + log2_4[n >> 30]; | ||
1028 | } | ||
1029 | |||
1030 | #ifndef M_PI | ||
1031 | #define M_PI 3.14159265358979323846264f // from CRC | ||
1032 | #endif | ||
1033 | |||
1034 | // code length assigned to a value with no huffman encoding | ||
1035 | #define NO_CODE 255 | ||
1036 | |||
1037 | /////////////////////// LEAF SETUP FUNCTIONS ////////////////////////// | ||
1038 | // | ||
1039 | // these functions are only called at setup, and only a few times | ||
1040 | // per file | ||
1041 | |||
1042 | static float float32_unpack(uint32 x) | ||
1043 | { | ||
1044 | // from the specification | ||
1045 | uint32 mantissa = x & 0x1fffff; | ||
1046 | uint32 sign = x & 0x80000000; | ||
1047 | uint32 exp = (x & 0x7fe00000) >> 21; | ||
1048 | double res = sign ? -(double)mantissa : (double)mantissa; | ||
1049 | return (float) ldexp((float)res, exp-788); | ||
1050 | } | ||
1051 | |||
1052 | |||
1053 | // zlib & jpeg huffman tables assume that the output symbols | ||
1054 | // can either be arbitrarily arranged, or have monotonically | ||
1055 | // increasing frequencies--they rely on the lengths being sorted; | ||
1056 | // this makes for a very simple generation algorithm. | ||
1057 | // vorbis allows a huffman table with non-sorted lengths. This | ||
1058 | // requires a more sophisticated construction, since symbols in | ||
1059 | // order do not map to huffman codes "in order". | ||
1060 | static void add_entry(Codebook *c, uint32 huff_code, int symbol, int count, int len, uint32 *values) | ||
1061 | { | ||
1062 | if (!c->sparse) { | ||
1063 | c->codewords [symbol] = huff_code; | ||
1064 | } else { | ||
1065 | c->codewords [count] = huff_code; | ||
1066 | c->codeword_lengths[count] = len; | ||
1067 | values [count] = symbol; | ||
1068 | } | ||
1069 | } | ||
1070 | |||
1071 | static int compute_codewords(Codebook *c, uint8 *len, int n, uint32 *values) | ||
1072 | { | ||
1073 | int i,k,m=0; | ||
1074 | uint32 available[32]; | ||
1075 | |||
1076 | memset(available, 0, sizeof(available)); | ||
1077 | // find the first entry | ||
1078 | for (k=0; k < n; ++k) if (len[k] < NO_CODE) break; | ||
1079 | if (k == n) { assert(c->sorted_entries == 0); return TRUE; } | ||
1080 | // add to the list | ||
1081 | add_entry(c, 0, k, m++, len[k], values); | ||
1082 | // add all available leaves | ||
1083 | for (i=1; i <= len[k]; ++i) | ||
1084 | available[i] = 1U << (32-i); | ||
1085 | // note that the above code treats the first case specially, | ||
1086 | // but it's really the same as the following code, so they | ||
1087 | // could probably be combined (except the initial code is 0, | ||
1088 | // and I use 0 in available[] to mean 'empty') | ||
1089 | for (i=k+1; i < n; ++i) { | ||
1090 | uint32 res; | ||
1091 | int z = len[i], y; | ||
1092 | if (z == NO_CODE) continue; | ||
1093 | // find lowest available leaf (should always be earliest, | ||
1094 | // which is what the specification calls for) | ||
1095 | // note that this property, and the fact we can never have | ||
1096 | // more than one free leaf at a given level, isn't totally | ||
1097 | // trivial to prove, but it seems true and the assert never | ||
1098 | // fires, so! | ||
1099 | while (z > 0 && !available[z]) --z; | ||
1100 | if (z == 0) { return FALSE; } | ||
1101 | res = available[z]; | ||
1102 | assert(z >= 0 && z < 32); | ||
1103 | available[z] = 0; | ||
1104 | add_entry(c, bit_reverse(res), i, m++, len[i], values); | ||
1105 | // propagate availability up the tree | ||
1106 | if (z != len[i]) { | ||
1107 | assert(len[i] >= 0 && len[i] < 32); | ||
1108 | for (y=len[i]; y > z; --y) { | ||
1109 | assert(available[y] == 0); | ||
1110 | available[y] = res + (1 << (32-y)); | ||
1111 | } | ||
1112 | } | ||
1113 | } | ||
1114 | return TRUE; | ||
1115 | } | ||
1116 | |||
1117 | // accelerated huffman table allows fast O(1) match of all symbols | ||
1118 | // of length <= STB_VORBIS_FAST_HUFFMAN_LENGTH | ||
1119 | static void compute_accelerated_huffman(Codebook *c) | ||
1120 | { | ||
1121 | int i, len; | ||
1122 | for (i=0; i < FAST_HUFFMAN_TABLE_SIZE; ++i) | ||
1123 | c->fast_huffman[i] = -1; | ||
1124 | |||
1125 | len = c->sparse ? c->sorted_entries : c->entries; | ||
1126 | #ifdef STB_VORBIS_FAST_HUFFMAN_SHORT | ||
1127 | if (len > 32767) len = 32767; // largest possible value we can encode! | ||
1128 | #endif | ||
1129 | for (i=0; i < len; ++i) { | ||
1130 | if (c->codeword_lengths[i] <= STB_VORBIS_FAST_HUFFMAN_LENGTH) { | ||
1131 | uint32 z = c->sparse ? bit_reverse(c->sorted_codewords[i]) : c->codewords[i]; | ||
1132 | // set table entries for all bit combinations in the higher bits | ||
1133 | while (z < FAST_HUFFMAN_TABLE_SIZE) { | ||
1134 | c->fast_huffman[z] = i; | ||
1135 | z += 1 << c->codeword_lengths[i]; | ||
1136 | } | ||
1137 | } | ||
1138 | } | ||
1139 | } | ||
1140 | |||
1141 | #ifdef _MSC_VER | ||
1142 | #define STBV_CDECL __cdecl | ||
1143 | #else | ||
1144 | #define STBV_CDECL | ||
1145 | #endif | ||
1146 | |||
1147 | static int STBV_CDECL uint32_compare(const void *p, const void *q) | ||
1148 | { | ||
1149 | uint32 x = * (uint32 *) p; | ||
1150 | uint32 y = * (uint32 *) q; | ||
1151 | return x < y ? -1 : x > y; | ||
1152 | } | ||
1153 | |||
1154 | static int include_in_sort(Codebook *c, uint8 len) | ||
1155 | { | ||
1156 | if (c->sparse) { assert(len != NO_CODE); return TRUE; } | ||
1157 | if (len == NO_CODE) return FALSE; | ||
1158 | if (len > STB_VORBIS_FAST_HUFFMAN_LENGTH) return TRUE; | ||
1159 | return FALSE; | ||
1160 | } | ||
1161 | |||
1162 | // if the fast table above doesn't work, we want to binary | ||
1163 | // search them... need to reverse the bits | ||
1164 | static void compute_sorted_huffman(Codebook *c, uint8 *lengths, uint32 *values) | ||
1165 | { | ||
1166 | int i, len; | ||
1167 | // build a list of all the entries | ||
1168 | // OPTIMIZATION: don't include the short ones, since they'll be caught by FAST_HUFFMAN. | ||
1169 | // this is kind of a frivolous optimization--I don't see any performance improvement, | ||
1170 | // but it's like 4 extra lines of code, so. | ||
1171 | if (!c->sparse) { | ||
1172 | int k = 0; | ||
1173 | for (i=0; i < c->entries; ++i) | ||
1174 | if (include_in_sort(c, lengths[i])) | ||
1175 | c->sorted_codewords[k++] = bit_reverse(c->codewords[i]); | ||
1176 | assert(k == c->sorted_entries); | ||
1177 | } else { | ||
1178 | for (i=0; i < c->sorted_entries; ++i) | ||
1179 | c->sorted_codewords[i] = bit_reverse(c->codewords[i]); | ||
1180 | } | ||
1181 | |||
1182 | qsort(c->sorted_codewords, c->sorted_entries, sizeof(c->sorted_codewords[0]), uint32_compare); | ||
1183 | c->sorted_codewords[c->sorted_entries] = 0xffffffff; | ||
1184 | |||
1185 | len = c->sparse ? c->sorted_entries : c->entries; | ||
1186 | // now we need to indicate how they correspond; we could either | ||
1187 | // #1: sort a different data structure that says who they correspond to | ||
1188 | // #2: for each sorted entry, search the original list to find who corresponds | ||
1189 | // #3: for each original entry, find the sorted entry | ||
1190 | // #1 requires extra storage, #2 is slow, #3 can use binary search! | ||
1191 | for (i=0; i < len; ++i) { | ||
1192 | int huff_len = c->sparse ? lengths[values[i]] : lengths[i]; | ||
1193 | if (include_in_sort(c,huff_len)) { | ||
1194 | uint32 code = bit_reverse(c->codewords[i]); | ||
1195 | int x=0, n=c->sorted_entries; | ||
1196 | while (n > 1) { | ||
1197 | // invariant: sc[x] <= code < sc[x+n] | ||
1198 | int m = x + (n >> 1); | ||
1199 | if (c->sorted_codewords[m] <= code) { | ||
1200 | x = m; | ||
1201 | n -= (n>>1); | ||
1202 | } else { | ||
1203 | n >>= 1; | ||
1204 | } | ||
1205 | } | ||
1206 | assert(c->sorted_codewords[x] == code); | ||
1207 | if (c->sparse) { | ||
1208 | c->sorted_values[x] = values[i]; | ||
1209 | c->codeword_lengths[x] = huff_len; | ||
1210 | } else { | ||
1211 | c->sorted_values[x] = i; | ||
1212 | } | ||
1213 | } | ||
1214 | } | ||
1215 | } | ||
1216 | |||
1217 | // only run while parsing the header (3 times) | ||
1218 | static int vorbis_validate(uint8 *data) | ||
1219 | { | ||
1220 | static uint8 vorbis[6] = { 'v', 'o', 'r', 'b', 'i', 's' }; | ||
1221 | return memcmp(data, vorbis, 6) == 0; | ||
1222 | } | ||
1223 | |||
1224 | // called from setup only, once per code book | ||
1225 | // (formula implied by specification) | ||
1226 | static int lookup1_values(int entries, int dim) | ||
1227 | { | ||
1228 | int r = (int) floor(exp((float) log((float) entries) / dim)); | ||
1229 | if ((int) floor(pow((float) r+1, dim)) <= entries) // (int) cast for MinGW warning; | ||
1230 | ++r; // floor() to avoid _ftol() when non-CRT | ||
1231 | if (pow((float) r+1, dim) <= entries) | ||
1232 | return -1; | ||
1233 | if ((int) floor(pow((float) r, dim)) > entries) | ||
1234 | return -1; | ||
1235 | return r; | ||
1236 | } | ||
1237 | |||
1238 | // called twice per file | ||
1239 | static void compute_twiddle_factors(int n, float *A, float *B, float *C) | ||
1240 | { | ||
1241 | int n4 = n >> 2, n8 = n >> 3; | ||
1242 | int k,k2; | ||
1243 | |||
1244 | for (k=k2=0; k < n4; ++k,k2+=2) { | ||
1245 | A[k2 ] = (float) cos(4*k*M_PI/n); | ||
1246 | A[k2+1] = (float) -sin(4*k*M_PI/n); | ||
1247 | B[k2 ] = (float) cos((k2+1)*M_PI/n/2) * 0.5f; | ||
1248 | B[k2+1] = (float) sin((k2+1)*M_PI/n/2) * 0.5f; | ||
1249 | } | ||
1250 | for (k=k2=0; k < n8; ++k,k2+=2) { | ||
1251 | C[k2 ] = (float) cos(2*(k2+1)*M_PI/n); | ||
1252 | C[k2+1] = (float) -sin(2*(k2+1)*M_PI/n); | ||
1253 | } | ||
1254 | } | ||
1255 | |||
1256 | static void compute_window(int n, float *window) | ||
1257 | { | ||
1258 | int n2 = n >> 1, i; | ||
1259 | for (i=0; i < n2; ++i) | ||
1260 | window[i] = (float) sin(0.5 * M_PI * square((float) sin((i - 0 + 0.5) / n2 * 0.5 * M_PI))); | ||
1261 | } | ||
1262 | |||
1263 | static void compute_bitreverse(int n, uint16 *rev) | ||
1264 | { | ||
1265 | int ld = ilog(n) - 1; // ilog is off-by-one from normal definitions | ||
1266 | int i, n8 = n >> 3; | ||
1267 | for (i=0; i < n8; ++i) | ||
1268 | rev[i] = (bit_reverse(i) >> (32-ld+3)) << 2; | ||
1269 | } | ||
1270 | |||
1271 | static int init_blocksize(vorb *f, int b, int n) | ||
1272 | { | ||
1273 | int n2 = n >> 1, n4 = n >> 2, n8 = n >> 3; | ||
1274 | f->A[b] = (float *) setup_malloc(f, sizeof(float) * n2); | ||
1275 | f->B[b] = (float *) setup_malloc(f, sizeof(float) * n2); | ||
1276 | f->C[b] = (float *) setup_malloc(f, sizeof(float) * n4); | ||
1277 | if (!f->A[b] || !f->B[b] || !f->C[b]) return error(f, VORBIS_outofmem); | ||
1278 | compute_twiddle_factors(n, f->A[b], f->B[b], f->C[b]); | ||
1279 | f->window[b] = (float *) setup_malloc(f, sizeof(float) * n2); | ||
1280 | if (!f->window[b]) return error(f, VORBIS_outofmem); | ||
1281 | compute_window(n, f->window[b]); | ||
1282 | f->bit_reverse[b] = (uint16 *) setup_malloc(f, sizeof(uint16) * n8); | ||
1283 | if (!f->bit_reverse[b]) return error(f, VORBIS_outofmem); | ||
1284 | compute_bitreverse(n, f->bit_reverse[b]); | ||
1285 | return TRUE; | ||
1286 | } | ||
1287 | |||
1288 | static void neighbors(uint16 *x, int n, int *plow, int *phigh) | ||
1289 | { | ||
1290 | int low = -1; | ||
1291 | int high = 65536; | ||
1292 | int i; | ||
1293 | for (i=0; i < n; ++i) { | ||
1294 | if (x[i] > low && x[i] < x[n]) { *plow = i; low = x[i]; } | ||
1295 | if (x[i] < high && x[i] > x[n]) { *phigh = i; high = x[i]; } | ||
1296 | } | ||
1297 | } | ||
1298 | |||
1299 | // this has been repurposed so y is now the original index instead of y | ||
1300 | typedef struct | ||
1301 | { | ||
1302 | uint16 x,id; | ||
1303 | } stbv__floor_ordering; | ||
1304 | |||
1305 | static int STBV_CDECL point_compare(const void *p, const void *q) | ||
1306 | { | ||
1307 | stbv__floor_ordering *a = (stbv__floor_ordering *) p; | ||
1308 | stbv__floor_ordering *b = (stbv__floor_ordering *) q; | ||
1309 | return a->x < b->x ? -1 : a->x > b->x; | ||
1310 | } | ||
1311 | |||
1312 | // | ||
1313 | /////////////////////// END LEAF SETUP FUNCTIONS ////////////////////////// | ||
1314 | |||
1315 | |||
1316 | #if defined(STB_VORBIS_NO_STDIO) | ||
1317 | #define USE_MEMORY(z) TRUE | ||
1318 | #else | ||
1319 | #define USE_MEMORY(z) ((z)->stream) | ||
1320 | #endif | ||
1321 | |||
1322 | static uint8 get8(vorb *z) | ||
1323 | { | ||
1324 | if (USE_MEMORY(z)) { | ||
1325 | if (z->stream >= z->stream_end) { z->eof = TRUE; return 0; } | ||
1326 | return *z->stream++; | ||
1327 | } | ||
1328 | |||
1329 | #ifndef STB_VORBIS_NO_STDIO | ||
1330 | { | ||
1331 | int c = fgetc(z->f); | ||
1332 | if (c == EOF) { z->eof = TRUE; return 0; } | ||
1333 | return c; | ||
1334 | } | ||
1335 | #endif | ||
1336 | } | ||
1337 | |||
1338 | static uint32 get32(vorb *f) | ||
1339 | { | ||
1340 | uint32 x; | ||
1341 | x = get8(f); | ||
1342 | x += get8(f) << 8; | ||
1343 | x += get8(f) << 16; | ||
1344 | x += (uint32) get8(f) << 24; | ||
1345 | return x; | ||
1346 | } | ||
1347 | |||
1348 | static int getn(vorb *z, uint8 *data, int n) | ||
1349 | { | ||
1350 | if (USE_MEMORY(z)) { | ||
1351 | if (z->stream+n > z->stream_end) { z->eof = 1; return 0; } | ||
1352 | memcpy(data, z->stream, n); | ||
1353 | z->stream += n; | ||
1354 | return 1; | ||
1355 | } | ||
1356 | |||
1357 | #ifndef STB_VORBIS_NO_STDIO | ||
1358 | if (fread(data, n, 1, z->f) == 1) | ||
1359 | return 1; | ||
1360 | else { | ||
1361 | z->eof = 1; | ||
1362 | return 0; | ||
1363 | } | ||
1364 | #endif | ||
1365 | } | ||
1366 | |||
1367 | static void skip(vorb *z, int n) | ||
1368 | { | ||
1369 | if (USE_MEMORY(z)) { | ||
1370 | z->stream += n; | ||
1371 | if (z->stream >= z->stream_end) z->eof = 1; | ||
1372 | return; | ||
1373 | } | ||
1374 | #ifndef STB_VORBIS_NO_STDIO | ||
1375 | { | ||
1376 | long x = ftell(z->f); | ||
1377 | fseek(z->f, x+n, SEEK_SET); | ||
1378 | } | ||
1379 | #endif | ||
1380 | } | ||
1381 | |||
1382 | static int set_file_offset(stb_vorbis *f, unsigned int loc) | ||
1383 | { | ||
1384 | #ifndef STB_VORBIS_NO_PUSHDATA_API | ||
1385 | if (f->push_mode) return 0; | ||
1386 | #endif | ||
1387 | f->eof = 0; | ||
1388 | if (USE_MEMORY(f)) { | ||
1389 | if (f->stream_start + loc >= f->stream_end || f->stream_start + loc < f->stream_start) { | ||
1390 | f->stream = f->stream_end; | ||
1391 | f->eof = 1; | ||
1392 | return 0; | ||
1393 | } else { | ||
1394 | f->stream = f->stream_start + loc; | ||
1395 | return 1; | ||
1396 | } | ||
1397 | } | ||
1398 | #ifndef STB_VORBIS_NO_STDIO | ||
1399 | if (loc + f->f_start < loc || loc >= 0x80000000) { | ||
1400 | loc = 0x7fffffff; | ||
1401 | f->eof = 1; | ||
1402 | } else { | ||
1403 | loc += f->f_start; | ||
1404 | } | ||
1405 | if (!fseek(f->f, loc, SEEK_SET)) | ||
1406 | return 1; | ||
1407 | f->eof = 1; | ||
1408 | fseek(f->f, f->f_start, SEEK_END); | ||
1409 | return 0; | ||
1410 | #endif | ||
1411 | } | ||
1412 | |||
1413 | |||
1414 | static uint8 ogg_page_header[4] = { 0x4f, 0x67, 0x67, 0x53 }; | ||
1415 | |||
1416 | static int capture_pattern(vorb *f) | ||
1417 | { | ||
1418 | if (0x4f != get8(f)) return FALSE; | ||
1419 | if (0x67 != get8(f)) return FALSE; | ||
1420 | if (0x67 != get8(f)) return FALSE; | ||
1421 | if (0x53 != get8(f)) return FALSE; | ||
1422 | return TRUE; | ||
1423 | } | ||
1424 | |||
1425 | #define PAGEFLAG_continued_packet 1 | ||
1426 | #define PAGEFLAG_first_page 2 | ||
1427 | #define PAGEFLAG_last_page 4 | ||
1428 | |||
1429 | static int start_page_no_capturepattern(vorb *f) | ||
1430 | { | ||
1431 | uint32 loc0,loc1,n; | ||
1432 | if (f->first_decode && !IS_PUSH_MODE(f)) { | ||
1433 | f->p_first.page_start = stb_vorbis_get_file_offset(f) - 4; | ||
1434 | } | ||
1435 | // stream structure version | ||
1436 | if (0 != get8(f)) return error(f, VORBIS_invalid_stream_structure_version); | ||
1437 | // header flag | ||
1438 | f->page_flag = get8(f); | ||
1439 | // absolute granule position | ||
1440 | loc0 = get32(f); | ||
1441 | loc1 = get32(f); | ||
1442 | // @TODO: validate loc0,loc1 as valid positions? | ||
1443 | // stream serial number -- vorbis doesn't interleave, so discard | ||
1444 | get32(f); | ||
1445 | //if (f->serial != get32(f)) return error(f, VORBIS_incorrect_stream_serial_number); | ||
1446 | // page sequence number | ||
1447 | n = get32(f); | ||
1448 | f->last_page = n; | ||
1449 | // CRC32 | ||
1450 | get32(f); | ||
1451 | // page_segments | ||
1452 | f->segment_count = get8(f); | ||
1453 | if (!getn(f, f->segments, f->segment_count)) | ||
1454 | return error(f, VORBIS_unexpected_eof); | ||
1455 | // assume we _don't_ know any the sample position of any segments | ||
1456 | f->end_seg_with_known_loc = -2; | ||
1457 | if (loc0 != ~0U || loc1 != ~0U) { | ||
1458 | int i; | ||
1459 | // determine which packet is the last one that will complete | ||
1460 | for (i=f->segment_count-1; i >= 0; --i) | ||
1461 | if (f->segments[i] < 255) | ||
1462 | break; | ||
1463 | // 'i' is now the index of the _last_ segment of a packet that ends | ||
1464 | if (i >= 0) { | ||
1465 | f->end_seg_with_known_loc = i; | ||
1466 | f->known_loc_for_packet = loc0; | ||
1467 | } | ||
1468 | } | ||
1469 | if (f->first_decode) { | ||
1470 | int i,len; | ||
1471 | len = 0; | ||
1472 | for (i=0; i < f->segment_count; ++i) | ||
1473 | len += f->segments[i]; | ||
1474 | len += 27 + f->segment_count; | ||
1475 | f->p_first.page_end = f->p_first.page_start + len; | ||
1476 | f->p_first.last_decoded_sample = loc0; | ||
1477 | } | ||
1478 | f->next_seg = 0; | ||
1479 | return TRUE; | ||
1480 | } | ||
1481 | |||
1482 | static int start_page(vorb *f) | ||
1483 | { | ||
1484 | if (!capture_pattern(f)) return error(f, VORBIS_missing_capture_pattern); | ||
1485 | return start_page_no_capturepattern(f); | ||
1486 | } | ||
1487 | |||
1488 | static int start_packet(vorb *f) | ||
1489 | { | ||
1490 | while (f->next_seg == -1) { | ||
1491 | if (!start_page(f)) return FALSE; | ||
1492 | if (f->page_flag & PAGEFLAG_continued_packet) | ||
1493 | return error(f, VORBIS_continued_packet_flag_invalid); | ||
1494 | } | ||
1495 | f->last_seg = FALSE; | ||
1496 | f->valid_bits = 0; | ||
1497 | f->packet_bytes = 0; | ||
1498 | f->bytes_in_seg = 0; | ||
1499 | // f->next_seg is now valid | ||
1500 | return TRUE; | ||
1501 | } | ||
1502 | |||
1503 | static int maybe_start_packet(vorb *f) | ||
1504 | { | ||
1505 | if (f->next_seg == -1) { | ||
1506 | int x = get8(f); | ||
1507 | if (f->eof) return FALSE; // EOF at page boundary is not an error! | ||
1508 | if (0x4f != x ) return error(f, VORBIS_missing_capture_pattern); | ||
1509 | if (0x67 != get8(f)) return error(f, VORBIS_missing_capture_pattern); | ||
1510 | if (0x67 != get8(f)) return error(f, VORBIS_missing_capture_pattern); | ||
1511 | if (0x53 != get8(f)) return error(f, VORBIS_missing_capture_pattern); | ||
1512 | if (!start_page_no_capturepattern(f)) return FALSE; | ||
1513 | if (f->page_flag & PAGEFLAG_continued_packet) { | ||
1514 | // set up enough state that we can read this packet if we want, | ||
1515 | // e.g. during recovery | ||
1516 | f->last_seg = FALSE; | ||
1517 | f->bytes_in_seg = 0; | ||
1518 | return error(f, VORBIS_continued_packet_flag_invalid); | ||
1519 | } | ||
1520 | } | ||
1521 | return start_packet(f); | ||
1522 | } | ||
1523 | |||
1524 | static int next_segment(vorb *f) | ||
1525 | { | ||
1526 | int len; | ||
1527 | if (f->last_seg) return 0; | ||
1528 | if (f->next_seg == -1) { | ||
1529 | f->last_seg_which = f->segment_count-1; // in case start_page fails | ||
1530 | if (!start_page(f)) { f->last_seg = 1; return 0; } | ||
1531 | if (!(f->page_flag & PAGEFLAG_continued_packet)) return error(f, VORBIS_continued_packet_flag_invalid); | ||
1532 | } | ||
1533 | len = f->segments[f->next_seg++]; | ||
1534 | if (len < 255) { | ||
1535 | f->last_seg = TRUE; | ||
1536 | f->last_seg_which = f->next_seg-1; | ||
1537 | } | ||
1538 | if (f->next_seg >= f->segment_count) | ||
1539 | f->next_seg = -1; | ||
1540 | assert(f->bytes_in_seg == 0); | ||
1541 | f->bytes_in_seg = len; | ||
1542 | return len; | ||
1543 | } | ||
1544 | |||
1545 | #define EOP (-1) | ||
1546 | #define INVALID_BITS (-1) | ||
1547 | |||
1548 | static int get8_packet_raw(vorb *f) | ||
1549 | { | ||
1550 | if (!f->bytes_in_seg) { // CLANG! | ||
1551 | if (f->last_seg) return EOP; | ||
1552 | else if (!next_segment(f)) return EOP; | ||
1553 | } | ||
1554 | assert(f->bytes_in_seg > 0); | ||
1555 | --f->bytes_in_seg; | ||
1556 | ++f->packet_bytes; | ||
1557 | return get8(f); | ||
1558 | } | ||
1559 | |||
1560 | static int get8_packet(vorb *f) | ||
1561 | { | ||
1562 | int x = get8_packet_raw(f); | ||
1563 | f->valid_bits = 0; | ||
1564 | return x; | ||
1565 | } | ||
1566 | |||
1567 | static int get32_packet(vorb *f) | ||
1568 | { | ||
1569 | uint32 x; | ||
1570 | x = get8_packet(f); | ||
1571 | x += get8_packet(f) << 8; | ||
1572 | x += get8_packet(f) << 16; | ||
1573 | x += (uint32) get8_packet(f) << 24; | ||
1574 | return x; | ||
1575 | } | ||
1576 | |||
1577 | static void flush_packet(vorb *f) | ||
1578 | { | ||
1579 | while (get8_packet_raw(f) != EOP); | ||
1580 | } | ||
1581 | |||
1582 | // @OPTIMIZE: this is the secondary bit decoder, so it's probably not as important | ||
1583 | // as the huffman decoder? | ||
1584 | static uint32 get_bits(vorb *f, int n) | ||
1585 | { | ||
1586 | uint32 z; | ||
1587 | |||
1588 | if (f->valid_bits < 0) return 0; | ||
1589 | if (f->valid_bits < n) { | ||
1590 | if (n > 24) { | ||
1591 | // the accumulator technique below would not work correctly in this case | ||
1592 | z = get_bits(f, 24); | ||
1593 | z += get_bits(f, n-24) << 24; | ||
1594 | return z; | ||
1595 | } | ||
1596 | if (f->valid_bits == 0) f->acc = 0; | ||
1597 | while (f->valid_bits < n) { | ||
1598 | int z = get8_packet_raw(f); | ||
1599 | if (z == EOP) { | ||
1600 | f->valid_bits = INVALID_BITS; | ||
1601 | return 0; | ||
1602 | } | ||
1603 | f->acc += z << f->valid_bits; | ||
1604 | f->valid_bits += 8; | ||
1605 | } | ||
1606 | } | ||
1607 | |||
1608 | assert(f->valid_bits >= n); | ||
1609 | z = f->acc & ((1 << n)-1); | ||
1610 | f->acc >>= n; | ||
1611 | f->valid_bits -= n; | ||
1612 | return z; | ||
1613 | } | ||
1614 | |||
1615 | // @OPTIMIZE: primary accumulator for huffman | ||
1616 | // expand the buffer to as many bits as possible without reading off end of packet | ||
1617 | // it might be nice to allow f->valid_bits and f->acc to be stored in registers, | ||
1618 | // e.g. cache them locally and decode locally | ||
1619 | static __forceinline void prep_huffman(vorb *f) | ||
1620 | { | ||
1621 | if (f->valid_bits <= 24) { | ||
1622 | if (f->valid_bits == 0) f->acc = 0; | ||
1623 | do { | ||
1624 | int z; | ||
1625 | if (f->last_seg && !f->bytes_in_seg) return; | ||
1626 | z = get8_packet_raw(f); | ||
1627 | if (z == EOP) return; | ||
1628 | f->acc += (unsigned) z << f->valid_bits; | ||
1629 | f->valid_bits += 8; | ||
1630 | } while (f->valid_bits <= 24); | ||
1631 | } | ||
1632 | } | ||
1633 | |||
1634 | enum | ||
1635 | { | ||
1636 | VORBIS_packet_id = 1, | ||
1637 | VORBIS_packet_comment = 3, | ||
1638 | VORBIS_packet_setup = 5 | ||
1639 | }; | ||
1640 | |||
1641 | static int codebook_decode_scalar_raw(vorb *f, Codebook *c) | ||
1642 | { | ||
1643 | int i; | ||
1644 | prep_huffman(f); | ||
1645 | |||
1646 | if (c->codewords == NULL && c->sorted_codewords == NULL) | ||
1647 | return -1; | ||
1648 | |||
1649 | // cases to use binary search: sorted_codewords && !c->codewords | ||
1650 | // sorted_codewords && c->entries > 8 | ||
1651 | if (c->entries > 8 ? c->sorted_codewords!=NULL : !c->codewords) { | ||
1652 | // binary search | ||
1653 | uint32 code = bit_reverse(f->acc); | ||
1654 | int x=0, n=c->sorted_entries, len; | ||
1655 | |||
1656 | while (n > 1) { | ||
1657 | // invariant: sc[x] <= code < sc[x+n] | ||
1658 | int m = x + (n >> 1); | ||
1659 | if (c->sorted_codewords[m] <= code) { | ||
1660 | x = m; | ||
1661 | n -= (n>>1); | ||
1662 | } else { | ||
1663 | n >>= 1; | ||
1664 | } | ||
1665 | } | ||
1666 | // x is now the sorted index | ||
1667 | if (!c->sparse) x = c->sorted_values[x]; | ||
1668 | // x is now sorted index if sparse, or symbol otherwise | ||
1669 | len = c->codeword_lengths[x]; | ||
1670 | if (f->valid_bits >= len) { | ||
1671 | f->acc >>= len; | ||
1672 | f->valid_bits -= len; | ||
1673 | return x; | ||
1674 | } | ||
1675 | |||
1676 | f->valid_bits = 0; | ||
1677 | return -1; | ||
1678 | } | ||
1679 | |||
1680 | // if small, linear search | ||
1681 | assert(!c->sparse); | ||
1682 | for (i=0; i < c->entries; ++i) { | ||
1683 | if (c->codeword_lengths[i] == NO_CODE) continue; | ||
1684 | if (c->codewords[i] == (f->acc & ((1 << c->codeword_lengths[i])-1))) { | ||
1685 | if (f->valid_bits >= c->codeword_lengths[i]) { | ||
1686 | f->acc >>= c->codeword_lengths[i]; | ||
1687 | f->valid_bits -= c->codeword_lengths[i]; | ||
1688 | return i; | ||
1689 | } | ||
1690 | f->valid_bits = 0; | ||
1691 | return -1; | ||
1692 | } | ||
1693 | } | ||
1694 | |||
1695 | error(f, VORBIS_invalid_stream); | ||
1696 | f->valid_bits = 0; | ||
1697 | return -1; | ||
1698 | } | ||
1699 | |||
1700 | #ifndef STB_VORBIS_NO_INLINE_DECODE | ||
1701 | |||
1702 | #define DECODE_RAW(var, f,c) \ | ||
1703 | if (f->valid_bits < STB_VORBIS_FAST_HUFFMAN_LENGTH) \ | ||
1704 | prep_huffman(f); \ | ||
1705 | var = f->acc & FAST_HUFFMAN_TABLE_MASK; \ | ||
1706 | var = c->fast_huffman[var]; \ | ||
1707 | if (var >= 0) { \ | ||
1708 | int n = c->codeword_lengths[var]; \ | ||
1709 | f->acc >>= n; \ | ||
1710 | f->valid_bits -= n; \ | ||
1711 | if (f->valid_bits < 0) { f->valid_bits = 0; var = -1; } \ | ||
1712 | } else { \ | ||
1713 | var = codebook_decode_scalar_raw(f,c); \ | ||
1714 | } | ||
1715 | |||
1716 | #else | ||
1717 | |||
1718 | static int codebook_decode_scalar(vorb *f, Codebook *c) | ||
1719 | { | ||
1720 | int i; | ||
1721 | if (f->valid_bits < STB_VORBIS_FAST_HUFFMAN_LENGTH) | ||
1722 | prep_huffman(f); | ||
1723 | // fast huffman table lookup | ||
1724 | i = f->acc & FAST_HUFFMAN_TABLE_MASK; | ||
1725 | i = c->fast_huffman[i]; | ||
1726 | if (i >= 0) { | ||
1727 | f->acc >>= c->codeword_lengths[i]; | ||
1728 | f->valid_bits -= c->codeword_lengths[i]; | ||
1729 | if (f->valid_bits < 0) { f->valid_bits = 0; return -1; } | ||
1730 | return i; | ||
1731 | } | ||
1732 | return codebook_decode_scalar_raw(f,c); | ||
1733 | } | ||
1734 | |||
1735 | #define DECODE_RAW(var,f,c) var = codebook_decode_scalar(f,c); | ||
1736 | |||
1737 | #endif | ||
1738 | |||
1739 | #define DECODE(var,f,c) \ | ||
1740 | DECODE_RAW(var,f,c) \ | ||
1741 | if (c->sparse) var = c->sorted_values[var]; | ||
1742 | |||
1743 | #ifndef STB_VORBIS_DIVIDES_IN_CODEBOOK | ||
1744 | #define DECODE_VQ(var,f,c) DECODE_RAW(var,f,c) | ||
1745 | #else | ||
1746 | #define DECODE_VQ(var,f,c) DECODE(var,f,c) | ||
1747 | #endif | ||
1748 | |||
1749 | |||
1750 | |||
1751 | |||
1752 | |||
1753 | |||
1754 | // CODEBOOK_ELEMENT_FAST is an optimization for the CODEBOOK_FLOATS case | ||
1755 | // where we avoid one addition | ||
1756 | #define CODEBOOK_ELEMENT(c,off) (c->multiplicands[off]) | ||
1757 | #define CODEBOOK_ELEMENT_FAST(c,off) (c->multiplicands[off]) | ||
1758 | #define CODEBOOK_ELEMENT_BASE(c) (0) | ||
1759 | |||
1760 | static int codebook_decode_start(vorb *f, Codebook *c) | ||
1761 | { | ||
1762 | int z = -1; | ||
1763 | |||
1764 | // type 0 is only legal in a scalar context | ||
1765 | if (c->lookup_type == 0) | ||
1766 | error(f, VORBIS_invalid_stream); | ||
1767 | else { | ||
1768 | DECODE_VQ(z,f,c); | ||
1769 | if (c->sparse) assert(z < c->sorted_entries); | ||
1770 | if (z < 0) { // check for EOP | ||
1771 | if (!f->bytes_in_seg) | ||
1772 | if (f->last_seg) | ||
1773 | return z; | ||
1774 | error(f, VORBIS_invalid_stream); | ||
1775 | } | ||
1776 | } | ||
1777 | return z; | ||
1778 | } | ||
1779 | |||
1780 | static int codebook_decode(vorb *f, Codebook *c, float *output, int len) | ||
1781 | { | ||
1782 | int i,z = codebook_decode_start(f,c); | ||
1783 | if (z < 0) return FALSE; | ||
1784 | if (len > c->dimensions) len = c->dimensions; | ||
1785 | |||
1786 | #ifdef STB_VORBIS_DIVIDES_IN_CODEBOOK | ||
1787 | if (c->lookup_type == 1) { | ||
1788 | float last = CODEBOOK_ELEMENT_BASE(c); | ||
1789 | int div = 1; | ||
1790 | for (i=0; i < len; ++i) { | ||
1791 | int off = (z / div) % c->lookup_values; | ||
1792 | float val = CODEBOOK_ELEMENT_FAST(c,off) + last; | ||
1793 | output[i] += val; | ||
1794 | if (c->sequence_p) last = val + c->minimum_value; | ||
1795 | div *= c->lookup_values; | ||
1796 | } | ||
1797 | return TRUE; | ||
1798 | } | ||
1799 | #endif | ||
1800 | |||
1801 | z *= c->dimensions; | ||
1802 | if (c->sequence_p) { | ||
1803 | float last = CODEBOOK_ELEMENT_BASE(c); | ||
1804 | for (i=0; i < len; ++i) { | ||
1805 | float val = CODEBOOK_ELEMENT_FAST(c,z+i) + last; | ||
1806 | output[i] += val; | ||
1807 | last = val + c->minimum_value; | ||
1808 | } | ||
1809 | } else { | ||
1810 | float last = CODEBOOK_ELEMENT_BASE(c); | ||
1811 | for (i=0; i < len; ++i) { | ||
1812 | output[i] += CODEBOOK_ELEMENT_FAST(c,z+i) + last; | ||
1813 | } | ||
1814 | } | ||
1815 | |||
1816 | return TRUE; | ||
1817 | } | ||
1818 | |||
1819 | static int codebook_decode_step(vorb *f, Codebook *c, float *output, int len, int step) | ||
1820 | { | ||
1821 | int i,z = codebook_decode_start(f,c); | ||
1822 | float last = CODEBOOK_ELEMENT_BASE(c); | ||
1823 | if (z < 0) return FALSE; | ||
1824 | if (len > c->dimensions) len = c->dimensions; | ||
1825 | |||
1826 | #ifdef STB_VORBIS_DIVIDES_IN_CODEBOOK | ||
1827 | if (c->lookup_type == 1) { | ||
1828 | int div = 1; | ||
1829 | for (i=0; i < len; ++i) { | ||
1830 | int off = (z / div) % c->lookup_values; | ||
1831 | float val = CODEBOOK_ELEMENT_FAST(c,off) + last; | ||
1832 | output[i*step] += val; | ||
1833 | if (c->sequence_p) last = val; | ||
1834 | div *= c->lookup_values; | ||
1835 | } | ||
1836 | return TRUE; | ||
1837 | } | ||
1838 | #endif | ||
1839 | |||
1840 | z *= c->dimensions; | ||
1841 | for (i=0; i < len; ++i) { | ||
1842 | float val = CODEBOOK_ELEMENT_FAST(c,z+i) + last; | ||
1843 | output[i*step] += val; | ||
1844 | if (c->sequence_p) last = val; | ||
1845 | } | ||
1846 | |||
1847 | return TRUE; | ||
1848 | } | ||
1849 | |||
1850 | static int codebook_decode_deinterleave_repeat(vorb *f, Codebook *c, float **outputs, int ch, int *c_inter_p, int *p_inter_p, int len, int total_decode) | ||
1851 | { | ||
1852 | int c_inter = *c_inter_p; | ||
1853 | int p_inter = *p_inter_p; | ||
1854 | int i,z, effective = c->dimensions; | ||
1855 | |||
1856 | // type 0 is only legal in a scalar context | ||
1857 | if (c->lookup_type == 0) return error(f, VORBIS_invalid_stream); | ||
1858 | |||
1859 | while (total_decode > 0) { | ||
1860 | float last = CODEBOOK_ELEMENT_BASE(c); | ||
1861 | DECODE_VQ(z,f,c); | ||
1862 | #ifndef STB_VORBIS_DIVIDES_IN_CODEBOOK | ||
1863 | assert(!c->sparse || z < c->sorted_entries); | ||
1864 | #endif | ||
1865 | if (z < 0) { | ||
1866 | if (!f->bytes_in_seg) | ||
1867 | if (f->last_seg) return FALSE; | ||
1868 | return error(f, VORBIS_invalid_stream); | ||
1869 | } | ||
1870 | |||
1871 | // if this will take us off the end of the buffers, stop short! | ||
1872 | // we check by computing the length of the virtual interleaved | ||
1873 | // buffer (len*ch), our current offset within it (p_inter*ch)+(c_inter), | ||
1874 | // and the length we'll be using (effective) | ||
1875 | if (c_inter + p_inter*ch + effective > len * ch) { | ||
1876 | effective = len*ch - (p_inter*ch - c_inter); | ||
1877 | } | ||
1878 | |||
1879 | #ifdef STB_VORBIS_DIVIDES_IN_CODEBOOK | ||
1880 | if (c->lookup_type == 1) { | ||
1881 | int div = 1; | ||
1882 | for (i=0; i < effective; ++i) { | ||
1883 | int off = (z / div) % c->lookup_values; | ||
1884 | float val = CODEBOOK_ELEMENT_FAST(c,off) + last; | ||
1885 | if (outputs[c_inter]) | ||
1886 | outputs[c_inter][p_inter] += val; | ||
1887 | if (++c_inter == ch) { c_inter = 0; ++p_inter; } | ||
1888 | if (c->sequence_p) last = val; | ||
1889 | div *= c->lookup_values; | ||
1890 | } | ||
1891 | } else | ||
1892 | #endif | ||
1893 | { | ||
1894 | z *= c->dimensions; | ||
1895 | if (c->sequence_p) { | ||
1896 | for (i=0; i < effective; ++i) { | ||
1897 | float val = CODEBOOK_ELEMENT_FAST(c,z+i) + last; | ||
1898 | if (outputs[c_inter]) | ||
1899 | outputs[c_inter][p_inter] += val; | ||
1900 | if (++c_inter == ch) { c_inter = 0; ++p_inter; } | ||
1901 | last = val; | ||
1902 | } | ||
1903 | } else { | ||
1904 | for (i=0; i < effective; ++i) { | ||
1905 | float val = CODEBOOK_ELEMENT_FAST(c,z+i) + last; | ||
1906 | if (outputs[c_inter]) | ||
1907 | outputs[c_inter][p_inter] += val; | ||
1908 | if (++c_inter == ch) { c_inter = 0; ++p_inter; } | ||
1909 | } | ||
1910 | } | ||
1911 | } | ||
1912 | |||
1913 | total_decode -= effective; | ||
1914 | } | ||
1915 | *c_inter_p = c_inter; | ||
1916 | *p_inter_p = p_inter; | ||
1917 | return TRUE; | ||
1918 | } | ||
1919 | |||
1920 | static int predict_point(int x, int x0, int x1, int y0, int y1) | ||
1921 | { | ||
1922 | int dy = y1 - y0; | ||
1923 | int adx = x1 - x0; | ||
1924 | // @OPTIMIZE: force int division to round in the right direction... is this necessary on x86? | ||
1925 | int err = abs(dy) * (x - x0); | ||
1926 | int off = err / adx; | ||
1927 | return dy < 0 ? y0 - off : y0 + off; | ||
1928 | } | ||
1929 | |||
1930 | // the following table is block-copied from the specification | ||
1931 | static float inverse_db_table[256] = | ||
1932 | { | ||
1933 | 1.0649863e-07f, 1.1341951e-07f, 1.2079015e-07f, 1.2863978e-07f, | ||
1934 | 1.3699951e-07f, 1.4590251e-07f, 1.5538408e-07f, 1.6548181e-07f, | ||
1935 | 1.7623575e-07f, 1.8768855e-07f, 1.9988561e-07f, 2.1287530e-07f, | ||
1936 | 2.2670913e-07f, 2.4144197e-07f, 2.5713223e-07f, 2.7384213e-07f, | ||
1937 | 2.9163793e-07f, 3.1059021e-07f, 3.3077411e-07f, 3.5226968e-07f, | ||
1938 | 3.7516214e-07f, 3.9954229e-07f, 4.2550680e-07f, 4.5315863e-07f, | ||
1939 | 4.8260743e-07f, 5.1396998e-07f, 5.4737065e-07f, 5.8294187e-07f, | ||
1940 | 6.2082472e-07f, 6.6116941e-07f, 7.0413592e-07f, 7.4989464e-07f, | ||
1941 | 7.9862701e-07f, 8.5052630e-07f, 9.0579828e-07f, 9.6466216e-07f, | ||
1942 | 1.0273513e-06f, 1.0941144e-06f, 1.1652161e-06f, 1.2409384e-06f, | ||
1943 | 1.3215816e-06f, 1.4074654e-06f, 1.4989305e-06f, 1.5963394e-06f, | ||
1944 | 1.7000785e-06f, 1.8105592e-06f, 1.9282195e-06f, 2.0535261e-06f, | ||
1945 | 2.1869758e-06f, 2.3290978e-06f, 2.4804557e-06f, 2.6416497e-06f, | ||
1946 | 2.8133190e-06f, 2.9961443e-06f, 3.1908506e-06f, 3.3982101e-06f, | ||
1947 | 3.6190449e-06f, 3.8542308e-06f, 4.1047004e-06f, 4.3714470e-06f, | ||
1948 | 4.6555282e-06f, 4.9580707e-06f, 5.2802740e-06f, 5.6234160e-06f, | ||
1949 | 5.9888572e-06f, 6.3780469e-06f, 6.7925283e-06f, 7.2339451e-06f, | ||
1950 | 7.7040476e-06f, 8.2047000e-06f, 8.7378876e-06f, 9.3057248e-06f, | ||
1951 | 9.9104632e-06f, 1.0554501e-05f, 1.1240392e-05f, 1.1970856e-05f, | ||
1952 | 1.2748789e-05f, 1.3577278e-05f, 1.4459606e-05f, 1.5399272e-05f, | ||
1953 | 1.6400004e-05f, 1.7465768e-05f, 1.8600792e-05f, 1.9809576e-05f, | ||
1954 | 2.1096914e-05f, 2.2467911e-05f, 2.3928002e-05f, 2.5482978e-05f, | ||
1955 | 2.7139006e-05f, 2.8902651e-05f, 3.0780908e-05f, 3.2781225e-05f, | ||
1956 | 3.4911534e-05f, 3.7180282e-05f, 3.9596466e-05f, 4.2169667e-05f, | ||
1957 | 4.4910090e-05f, 4.7828601e-05f, 5.0936773e-05f, 5.4246931e-05f, | ||
1958 | 5.7772202e-05f, 6.1526565e-05f, 6.5524908e-05f, 6.9783085e-05f, | ||
1959 | 7.4317983e-05f, 7.9147585e-05f, 8.4291040e-05f, 8.9768747e-05f, | ||
1960 | 9.5602426e-05f, 0.00010181521f, 0.00010843174f, 0.00011547824f, | ||
1961 | 0.00012298267f, 0.00013097477f, 0.00013948625f, 0.00014855085f, | ||
1962 | 0.00015820453f, 0.00016848555f, 0.00017943469f, 0.00019109536f, | ||
1963 | 0.00020351382f, 0.00021673929f, 0.00023082423f, 0.00024582449f, | ||
1964 | 0.00026179955f, 0.00027881276f, 0.00029693158f, 0.00031622787f, | ||
1965 | 0.00033677814f, 0.00035866388f, 0.00038197188f, 0.00040679456f, | ||
1966 | 0.00043323036f, 0.00046138411f, 0.00049136745f, 0.00052329927f, | ||
1967 | 0.00055730621f, 0.00059352311f, 0.00063209358f, 0.00067317058f, | ||
1968 | 0.00071691700f, 0.00076350630f, 0.00081312324f, 0.00086596457f, | ||
1969 | 0.00092223983f, 0.00098217216f, 0.0010459992f, 0.0011139742f, | ||
1970 | 0.0011863665f, 0.0012634633f, 0.0013455702f, 0.0014330129f, | ||
1971 | 0.0015261382f, 0.0016253153f, 0.0017309374f, 0.0018434235f, | ||
1972 | 0.0019632195f, 0.0020908006f, 0.0022266726f, 0.0023713743f, | ||
1973 | 0.0025254795f, 0.0026895994f, 0.0028643847f, 0.0030505286f, | ||
1974 | 0.0032487691f, 0.0034598925f, 0.0036847358f, 0.0039241906f, | ||
1975 | 0.0041792066f, 0.0044507950f, 0.0047400328f, 0.0050480668f, | ||
1976 | 0.0053761186f, 0.0057254891f, 0.0060975636f, 0.0064938176f, | ||
1977 | 0.0069158225f, 0.0073652516f, 0.0078438871f, 0.0083536271f, | ||
1978 | 0.0088964928f, 0.009474637f, 0.010090352f, 0.010746080f, | ||
1979 | 0.011444421f, 0.012188144f, 0.012980198f, 0.013823725f, | ||
1980 | 0.014722068f, 0.015678791f, 0.016697687f, 0.017782797f, | ||
1981 | 0.018938423f, 0.020169149f, 0.021479854f, 0.022875735f, | ||
1982 | 0.024362330f, 0.025945531f, 0.027631618f, 0.029427276f, | ||
1983 | 0.031339626f, 0.033376252f, 0.035545228f, 0.037855157f, | ||
1984 | 0.040315199f, 0.042935108f, 0.045725273f, 0.048696758f, | ||
1985 | 0.051861348f, 0.055231591f, 0.058820850f, 0.062643361f, | ||
1986 | 0.066714279f, 0.071049749f, 0.075666962f, 0.080584227f, | ||
1987 | 0.085821044f, 0.091398179f, 0.097337747f, 0.10366330f, | ||
1988 | 0.11039993f, 0.11757434f, 0.12521498f, 0.13335215f, | ||
1989 | 0.14201813f, 0.15124727f, 0.16107617f, 0.17154380f, | ||
1990 | 0.18269168f, 0.19456402f, 0.20720788f, 0.22067342f, | ||
1991 | 0.23501402f, 0.25028656f, 0.26655159f, 0.28387361f, | ||
1992 | 0.30232132f, 0.32196786f, 0.34289114f, 0.36517414f, | ||
1993 | 0.38890521f, 0.41417847f, 0.44109412f, 0.46975890f, | ||
1994 | 0.50028648f, 0.53279791f, 0.56742212f, 0.60429640f, | ||
1995 | 0.64356699f, 0.68538959f, 0.72993007f, 0.77736504f, | ||
1996 | 0.82788260f, 0.88168307f, 0.9389798f, 1.0f | ||
1997 | }; | ||
1998 | |||
1999 | |||
2000 | // @OPTIMIZE: if you want to replace this bresenham line-drawing routine, | ||
2001 | // note that you must produce bit-identical output to decode correctly; | ||
2002 | // this specific sequence of operations is specified in the spec (it's | ||
2003 | // drawing integer-quantized frequency-space lines that the encoder | ||
2004 | // expects to be exactly the same) | ||
2005 | // ... also, isn't the whole point of Bresenham's algorithm to NOT | ||
2006 | // have to divide in the setup? sigh. | ||
2007 | #ifndef STB_VORBIS_NO_DEFER_FLOOR | ||
2008 | #define LINE_OP(a,b) a *= b | ||
2009 | #else | ||
2010 | #define LINE_OP(a,b) a = b | ||
2011 | #endif | ||
2012 | |||
2013 | #ifdef STB_VORBIS_DIVIDE_TABLE | ||
2014 | #define DIVTAB_NUMER 32 | ||
2015 | #define DIVTAB_DENOM 64 | ||
2016 | int8 integer_divide_table[DIVTAB_NUMER][DIVTAB_DENOM]; // 2KB | ||
2017 | #endif | ||
2018 | |||
2019 | static __forceinline void draw_line(float *output, int x0, int y0, int x1, int y1, int n) | ||
2020 | { | ||
2021 | int dy = y1 - y0; | ||
2022 | int adx = x1 - x0; | ||
2023 | int ady = abs(dy); | ||
2024 | int base; | ||
2025 | int x=x0,y=y0; | ||
2026 | int err = 0; | ||
2027 | int sy; | ||
2028 | |||
2029 | #ifdef STB_VORBIS_DIVIDE_TABLE | ||
2030 | if (adx < DIVTAB_DENOM && ady < DIVTAB_NUMER) { | ||
2031 | if (dy < 0) { | ||
2032 | base = -integer_divide_table[ady][adx]; | ||
2033 | sy = base-1; | ||
2034 | } else { | ||
2035 | base = integer_divide_table[ady][adx]; | ||
2036 | sy = base+1; | ||
2037 | } | ||
2038 | } else { | ||
2039 | base = dy / adx; | ||
2040 | if (dy < 0) | ||
2041 | sy = base - 1; | ||
2042 | else | ||
2043 | sy = base+1; | ||
2044 | } | ||
2045 | #else | ||
2046 | base = dy / adx; | ||
2047 | if (dy < 0) | ||
2048 | sy = base - 1; | ||
2049 | else | ||
2050 | sy = base+1; | ||
2051 | #endif | ||
2052 | ady -= abs(base) * adx; | ||
2053 | if (x1 > n) x1 = n; | ||
2054 | if (x < x1) { | ||
2055 | LINE_OP(output[x], inverse_db_table[y&255]); | ||
2056 | for (++x; x < x1; ++x) { | ||
2057 | err += ady; | ||
2058 | if (err >= adx) { | ||
2059 | err -= adx; | ||
2060 | y += sy; | ||
2061 | } else | ||
2062 | y += base; | ||
2063 | LINE_OP(output[x], inverse_db_table[y&255]); | ||
2064 | } | ||
2065 | } | ||
2066 | } | ||
2067 | |||
2068 | static int residue_decode(vorb *f, Codebook *book, float *target, int offset, int n, int rtype) | ||
2069 | { | ||
2070 | int k; | ||
2071 | if (rtype == 0) { | ||
2072 | int step = n / book->dimensions; | ||
2073 | for (k=0; k < step; ++k) | ||
2074 | if (!codebook_decode_step(f, book, target+offset+k, n-offset-k, step)) | ||
2075 | return FALSE; | ||
2076 | } else { | ||
2077 | for (k=0; k < n; ) { | ||
2078 | if (!codebook_decode(f, book, target+offset, n-k)) | ||
2079 | return FALSE; | ||
2080 | k += book->dimensions; | ||
2081 | offset += book->dimensions; | ||
2082 | } | ||
2083 | } | ||
2084 | return TRUE; | ||
2085 | } | ||
2086 | |||
2087 | // n is 1/2 of the blocksize -- | ||
2088 | // specification: "Correct per-vector decode length is [n]/2" | ||
2089 | static void decode_residue(vorb *f, float *residue_buffers[], int ch, int n, int rn, uint8 *do_not_decode) | ||
2090 | { | ||
2091 | int i,j,pass; | ||
2092 | Residue *r = f->residue_config + rn; | ||
2093 | int rtype = f->residue_types[rn]; | ||
2094 | int c = r->classbook; | ||
2095 | int classwords = f->codebooks[c].dimensions; | ||
2096 | unsigned int actual_size = rtype == 2 ? n*2 : n; | ||
2097 | unsigned int limit_r_begin = (r->begin < actual_size ? r->begin : actual_size); | ||
2098 | unsigned int limit_r_end = (r->end < actual_size ? r->end : actual_size); | ||
2099 | int n_read = limit_r_end - limit_r_begin; | ||
2100 | int part_read = n_read / r->part_size; | ||
2101 | int temp_alloc_point = temp_alloc_save(f); | ||
2102 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
2103 | uint8 ***part_classdata = (uint8 ***) temp_block_array(f,f->channels, part_read * sizeof(**part_classdata)); | ||
2104 | #else | ||
2105 | int **classifications = (int **) temp_block_array(f,f->channels, part_read * sizeof(**classifications)); | ||
2106 | #endif | ||
2107 | |||
2108 | CHECK(f); | ||
2109 | |||
2110 | for (i=0; i < ch; ++i) | ||
2111 | if (!do_not_decode[i]) | ||
2112 | memset(residue_buffers[i], 0, sizeof(float) * n); | ||
2113 | |||
2114 | if (rtype == 2 && ch != 1) { | ||
2115 | for (j=0; j < ch; ++j) | ||
2116 | if (!do_not_decode[j]) | ||
2117 | break; | ||
2118 | if (j == ch) | ||
2119 | goto done; | ||
2120 | |||
2121 | for (pass=0; pass < 8; ++pass) { | ||
2122 | int pcount = 0, class_set = 0; | ||
2123 | if (ch == 2) { | ||
2124 | while (pcount < part_read) { | ||
2125 | int z = r->begin + pcount*r->part_size; | ||
2126 | int c_inter = (z & 1), p_inter = z>>1; | ||
2127 | if (pass == 0) { | ||
2128 | Codebook *c = f->codebooks+r->classbook; | ||
2129 | int q; | ||
2130 | DECODE(q,f,c); | ||
2131 | if (q == EOP) goto done; | ||
2132 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
2133 | part_classdata[0][class_set] = r->classdata[q]; | ||
2134 | #else | ||
2135 | for (i=classwords-1; i >= 0; --i) { | ||
2136 | classifications[0][i+pcount] = q % r->classifications; | ||
2137 | q /= r->classifications; | ||
2138 | } | ||
2139 | #endif | ||
2140 | } | ||
2141 | for (i=0; i < classwords && pcount < part_read; ++i, ++pcount) { | ||
2142 | int z = r->begin + pcount*r->part_size; | ||
2143 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
2144 | int c = part_classdata[0][class_set][i]; | ||
2145 | #else | ||
2146 | int c = classifications[0][pcount]; | ||
2147 | #endif | ||
2148 | int b = r->residue_books[c][pass]; | ||
2149 | if (b >= 0) { | ||
2150 | Codebook *book = f->codebooks + b; | ||
2151 | #ifdef STB_VORBIS_DIVIDES_IN_CODEBOOK | ||
2152 | if (!codebook_decode_deinterleave_repeat(f, book, residue_buffers, ch, &c_inter, &p_inter, n, r->part_size)) | ||
2153 | goto done; | ||
2154 | #else | ||
2155 | // saves 1% | ||
2156 | if (!codebook_decode_deinterleave_repeat(f, book, residue_buffers, ch, &c_inter, &p_inter, n, r->part_size)) | ||
2157 | goto done; | ||
2158 | #endif | ||
2159 | } else { | ||
2160 | z += r->part_size; | ||
2161 | c_inter = z & 1; | ||
2162 | p_inter = z >> 1; | ||
2163 | } | ||
2164 | } | ||
2165 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
2166 | ++class_set; | ||
2167 | #endif | ||
2168 | } | ||
2169 | } else if (ch > 2) { | ||
2170 | while (pcount < part_read) { | ||
2171 | int z = r->begin + pcount*r->part_size; | ||
2172 | int c_inter = z % ch, p_inter = z/ch; | ||
2173 | if (pass == 0) { | ||
2174 | Codebook *c = f->codebooks+r->classbook; | ||
2175 | int q; | ||
2176 | DECODE(q,f,c); | ||
2177 | if (q == EOP) goto done; | ||
2178 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
2179 | part_classdata[0][class_set] = r->classdata[q]; | ||
2180 | #else | ||
2181 | for (i=classwords-1; i >= 0; --i) { | ||
2182 | classifications[0][i+pcount] = q % r->classifications; | ||
2183 | q /= r->classifications; | ||
2184 | } | ||
2185 | #endif | ||
2186 | } | ||
2187 | for (i=0; i < classwords && pcount < part_read; ++i, ++pcount) { | ||
2188 | int z = r->begin + pcount*r->part_size; | ||
2189 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
2190 | int c = part_classdata[0][class_set][i]; | ||
2191 | #else | ||
2192 | int c = classifications[0][pcount]; | ||
2193 | #endif | ||
2194 | int b = r->residue_books[c][pass]; | ||
2195 | if (b >= 0) { | ||
2196 | Codebook *book = f->codebooks + b; | ||
2197 | if (!codebook_decode_deinterleave_repeat(f, book, residue_buffers, ch, &c_inter, &p_inter, n, r->part_size)) | ||
2198 | goto done; | ||
2199 | } else { | ||
2200 | z += r->part_size; | ||
2201 | c_inter = z % ch; | ||
2202 | p_inter = z / ch; | ||
2203 | } | ||
2204 | } | ||
2205 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
2206 | ++class_set; | ||
2207 | #endif | ||
2208 | } | ||
2209 | } | ||
2210 | } | ||
2211 | goto done; | ||
2212 | } | ||
2213 | CHECK(f); | ||
2214 | |||
2215 | for (pass=0; pass < 8; ++pass) { | ||
2216 | int pcount = 0, class_set=0; | ||
2217 | while (pcount < part_read) { | ||
2218 | if (pass == 0) { | ||
2219 | for (j=0; j < ch; ++j) { | ||
2220 | if (!do_not_decode[j]) { | ||
2221 | Codebook *c = f->codebooks+r->classbook; | ||
2222 | int temp; | ||
2223 | DECODE(temp,f,c); | ||
2224 | if (temp == EOP) goto done; | ||
2225 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
2226 | part_classdata[j][class_set] = r->classdata[temp]; | ||
2227 | #else | ||
2228 | for (i=classwords-1; i >= 0; --i) { | ||
2229 | classifications[j][i+pcount] = temp % r->classifications; | ||
2230 | temp /= r->classifications; | ||
2231 | } | ||
2232 | #endif | ||
2233 | } | ||
2234 | } | ||
2235 | } | ||
2236 | for (i=0; i < classwords && pcount < part_read; ++i, ++pcount) { | ||
2237 | for (j=0; j < ch; ++j) { | ||
2238 | if (!do_not_decode[j]) { | ||
2239 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
2240 | int c = part_classdata[j][class_set][i]; | ||
2241 | #else | ||
2242 | int c = classifications[j][pcount]; | ||
2243 | #endif | ||
2244 | int b = r->residue_books[c][pass]; | ||
2245 | if (b >= 0) { | ||
2246 | float *target = residue_buffers[j]; | ||
2247 | int offset = r->begin + pcount * r->part_size; | ||
2248 | int n = r->part_size; | ||
2249 | Codebook *book = f->codebooks + b; | ||
2250 | if (!residue_decode(f, book, target, offset, n, rtype)) | ||
2251 | goto done; | ||
2252 | } | ||
2253 | } | ||
2254 | } | ||
2255 | } | ||
2256 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
2257 | ++class_set; | ||
2258 | #endif | ||
2259 | } | ||
2260 | } | ||
2261 | done: | ||
2262 | CHECK(f); | ||
2263 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
2264 | temp_free(f,part_classdata); | ||
2265 | #else | ||
2266 | temp_free(f,classifications); | ||
2267 | #endif | ||
2268 | temp_alloc_restore(f,temp_alloc_point); | ||
2269 | } | ||
2270 | |||
2271 | |||
2272 | #if 0 | ||
2273 | // slow way for debugging | ||
2274 | void inverse_mdct_slow(float *buffer, int n) | ||
2275 | { | ||
2276 | int i,j; | ||
2277 | int n2 = n >> 1; | ||
2278 | float *x = (float *) malloc(sizeof(*x) * n2); | ||
2279 | memcpy(x, buffer, sizeof(*x) * n2); | ||
2280 | for (i=0; i < n; ++i) { | ||
2281 | float acc = 0; | ||
2282 | for (j=0; j < n2; ++j) | ||
2283 | // formula from paper: | ||
2284 | //acc += n/4.0f * x[j] * (float) cos(M_PI / 2 / n * (2 * i + 1 + n/2.0)*(2*j+1)); | ||
2285 | // formula from wikipedia | ||
2286 | //acc += 2.0f / n2 * x[j] * (float) cos(M_PI/n2 * (i + 0.5 + n2/2)*(j + 0.5)); | ||
2287 | // these are equivalent, except the formula from the paper inverts the multiplier! | ||
2288 | // however, what actually works is NO MULTIPLIER!?! | ||
2289 | //acc += 64 * 2.0f / n2 * x[j] * (float) cos(M_PI/n2 * (i + 0.5 + n2/2)*(j + 0.5)); | ||
2290 | acc += x[j] * (float) cos(M_PI / 2 / n * (2 * i + 1 + n/2.0)*(2*j+1)); | ||
2291 | buffer[i] = acc; | ||
2292 | } | ||
2293 | free(x); | ||
2294 | } | ||
2295 | #elif 0 | ||
2296 | // same as above, but just barely able to run in real time on modern machines | ||
2297 | void inverse_mdct_slow(float *buffer, int n, vorb *f, int blocktype) | ||
2298 | { | ||
2299 | float mcos[16384]; | ||
2300 | int i,j; | ||
2301 | int n2 = n >> 1, nmask = (n << 2) -1; | ||
2302 | float *x = (float *) malloc(sizeof(*x) * n2); | ||
2303 | memcpy(x, buffer, sizeof(*x) * n2); | ||
2304 | for (i=0; i < 4*n; ++i) | ||
2305 | mcos[i] = (float) cos(M_PI / 2 * i / n); | ||
2306 | |||
2307 | for (i=0; i < n; ++i) { | ||
2308 | float acc = 0; | ||
2309 | for (j=0; j < n2; ++j) | ||
2310 | acc += x[j] * mcos[(2 * i + 1 + n2)*(2*j+1) & nmask]; | ||
2311 | buffer[i] = acc; | ||
2312 | } | ||
2313 | free(x); | ||
2314 | } | ||
2315 | #elif 0 | ||
2316 | // transform to use a slow dct-iv; this is STILL basically trivial, | ||
2317 | // but only requires half as many ops | ||
2318 | void dct_iv_slow(float *buffer, int n) | ||
2319 | { | ||
2320 | float mcos[16384]; | ||
2321 | float x[2048]; | ||
2322 | int i,j; | ||
2323 | int n2 = n >> 1, nmask = (n << 3) - 1; | ||
2324 | memcpy(x, buffer, sizeof(*x) * n); | ||
2325 | for (i=0; i < 8*n; ++i) | ||
2326 | mcos[i] = (float) cos(M_PI / 4 * i / n); | ||
2327 | for (i=0; i < n; ++i) { | ||
2328 | float acc = 0; | ||
2329 | for (j=0; j < n; ++j) | ||
2330 | acc += x[j] * mcos[((2 * i + 1)*(2*j+1)) & nmask]; | ||
2331 | buffer[i] = acc; | ||
2332 | } | ||
2333 | } | ||
2334 | |||
2335 | void inverse_mdct_slow(float *buffer, int n, vorb *f, int blocktype) | ||
2336 | { | ||
2337 | int i, n4 = n >> 2, n2 = n >> 1, n3_4 = n - n4; | ||
2338 | float temp[4096]; | ||
2339 | |||
2340 | memcpy(temp, buffer, n2 * sizeof(float)); | ||
2341 | dct_iv_slow(temp, n2); // returns -c'-d, a-b' | ||
2342 | |||
2343 | for (i=0; i < n4 ; ++i) buffer[i] = temp[i+n4]; // a-b' | ||
2344 | for ( ; i < n3_4; ++i) buffer[i] = -temp[n3_4 - i - 1]; // b-a', c+d' | ||
2345 | for ( ; i < n ; ++i) buffer[i] = -temp[i - n3_4]; // c'+d | ||
2346 | } | ||
2347 | #endif | ||
2348 | |||
2349 | #ifndef LIBVORBIS_MDCT | ||
2350 | #define LIBVORBIS_MDCT 0 | ||
2351 | #endif | ||
2352 | |||
2353 | #if LIBVORBIS_MDCT | ||
2354 | // directly call the vorbis MDCT using an interface documented | ||
2355 | // by Jeff Roberts... useful for performance comparison | ||
2356 | typedef struct | ||
2357 | { | ||
2358 | int n; | ||
2359 | int log2n; | ||
2360 | |||
2361 | float *trig; | ||
2362 | int *bitrev; | ||
2363 | |||
2364 | float scale; | ||
2365 | } mdct_lookup; | ||
2366 | |||
2367 | extern void mdct_init(mdct_lookup *lookup, int n); | ||
2368 | extern void mdct_clear(mdct_lookup *l); | ||
2369 | extern void mdct_backward(mdct_lookup *init, float *in, float *out); | ||
2370 | |||
2371 | mdct_lookup M1,M2; | ||
2372 | |||
2373 | void inverse_mdct(float *buffer, int n, vorb *f, int blocktype) | ||
2374 | { | ||
2375 | mdct_lookup *M; | ||
2376 | if (M1.n == n) M = &M1; | ||
2377 | else if (M2.n == n) M = &M2; | ||
2378 | else if (M1.n == 0) { mdct_init(&M1, n); M = &M1; } | ||
2379 | else { | ||
2380 | if (M2.n) __asm int 3; | ||
2381 | mdct_init(&M2, n); | ||
2382 | M = &M2; | ||
2383 | } | ||
2384 | |||
2385 | mdct_backward(M, buffer, buffer); | ||
2386 | } | ||
2387 | #endif | ||
2388 | |||
2389 | |||
2390 | // the following were split out into separate functions while optimizing; | ||
2391 | // they could be pushed back up but eh. __forceinline showed no change; | ||
2392 | // they're probably already being inlined. | ||
2393 | static void imdct_step3_iter0_loop(int n, float *e, int i_off, int k_off, float *A) | ||
2394 | { | ||
2395 | float *ee0 = e + i_off; | ||
2396 | float *ee2 = ee0 + k_off; | ||
2397 | int i; | ||
2398 | |||
2399 | assert((n & 3) == 0); | ||
2400 | for (i=(n>>2); i > 0; --i) { | ||
2401 | float k00_20, k01_21; | ||
2402 | k00_20 = ee0[ 0] - ee2[ 0]; | ||
2403 | k01_21 = ee0[-1] - ee2[-1]; | ||
2404 | ee0[ 0] += ee2[ 0];//ee0[ 0] = ee0[ 0] + ee2[ 0]; | ||
2405 | ee0[-1] += ee2[-1];//ee0[-1] = ee0[-1] + ee2[-1]; | ||
2406 | ee2[ 0] = k00_20 * A[0] - k01_21 * A[1]; | ||
2407 | ee2[-1] = k01_21 * A[0] + k00_20 * A[1]; | ||
2408 | A += 8; | ||
2409 | |||
2410 | k00_20 = ee0[-2] - ee2[-2]; | ||
2411 | k01_21 = ee0[-3] - ee2[-3]; | ||
2412 | ee0[-2] += ee2[-2];//ee0[-2] = ee0[-2] + ee2[-2]; | ||
2413 | ee0[-3] += ee2[-3];//ee0[-3] = ee0[-3] + ee2[-3]; | ||
2414 | ee2[-2] = k00_20 * A[0] - k01_21 * A[1]; | ||
2415 | ee2[-3] = k01_21 * A[0] + k00_20 * A[1]; | ||
2416 | A += 8; | ||
2417 | |||
2418 | k00_20 = ee0[-4] - ee2[-4]; | ||
2419 | k01_21 = ee0[-5] - ee2[-5]; | ||
2420 | ee0[-4] += ee2[-4];//ee0[-4] = ee0[-4] + ee2[-4]; | ||
2421 | ee0[-5] += ee2[-5];//ee0[-5] = ee0[-5] + ee2[-5]; | ||
2422 | ee2[-4] = k00_20 * A[0] - k01_21 * A[1]; | ||
2423 | ee2[-5] = k01_21 * A[0] + k00_20 * A[1]; | ||
2424 | A += 8; | ||
2425 | |||
2426 | k00_20 = ee0[-6] - ee2[-6]; | ||
2427 | k01_21 = ee0[-7] - ee2[-7]; | ||
2428 | ee0[-6] += ee2[-6];//ee0[-6] = ee0[-6] + ee2[-6]; | ||
2429 | ee0[-7] += ee2[-7];//ee0[-7] = ee0[-7] + ee2[-7]; | ||
2430 | ee2[-6] = k00_20 * A[0] - k01_21 * A[1]; | ||
2431 | ee2[-7] = k01_21 * A[0] + k00_20 * A[1]; | ||
2432 | A += 8; | ||
2433 | ee0 -= 8; | ||
2434 | ee2 -= 8; | ||
2435 | } | ||
2436 | } | ||
2437 | |||
2438 | static void imdct_step3_inner_r_loop(int lim, float *e, int d0, int k_off, float *A, int k1) | ||
2439 | { | ||
2440 | int i; | ||
2441 | float k00_20, k01_21; | ||
2442 | |||
2443 | float *e0 = e + d0; | ||
2444 | float *e2 = e0 + k_off; | ||
2445 | |||
2446 | for (i=lim >> 2; i > 0; --i) { | ||
2447 | k00_20 = e0[-0] - e2[-0]; | ||
2448 | k01_21 = e0[-1] - e2[-1]; | ||
2449 | e0[-0] += e2[-0];//e0[-0] = e0[-0] + e2[-0]; | ||
2450 | e0[-1] += e2[-1];//e0[-1] = e0[-1] + e2[-1]; | ||
2451 | e2[-0] = (k00_20)*A[0] - (k01_21) * A[1]; | ||
2452 | e2[-1] = (k01_21)*A[0] + (k00_20) * A[1]; | ||
2453 | |||
2454 | A += k1; | ||
2455 | |||
2456 | k00_20 = e0[-2] - e2[-2]; | ||
2457 | k01_21 = e0[-3] - e2[-3]; | ||
2458 | e0[-2] += e2[-2];//e0[-2] = e0[-2] + e2[-2]; | ||
2459 | e0[-3] += e2[-3];//e0[-3] = e0[-3] + e2[-3]; | ||
2460 | e2[-2] = (k00_20)*A[0] - (k01_21) * A[1]; | ||
2461 | e2[-3] = (k01_21)*A[0] + (k00_20) * A[1]; | ||
2462 | |||
2463 | A += k1; | ||
2464 | |||
2465 | k00_20 = e0[-4] - e2[-4]; | ||
2466 | k01_21 = e0[-5] - e2[-5]; | ||
2467 | e0[-4] += e2[-4];//e0[-4] = e0[-4] + e2[-4]; | ||
2468 | e0[-5] += e2[-5];//e0[-5] = e0[-5] + e2[-5]; | ||
2469 | e2[-4] = (k00_20)*A[0] - (k01_21) * A[1]; | ||
2470 | e2[-5] = (k01_21)*A[0] + (k00_20) * A[1]; | ||
2471 | |||
2472 | A += k1; | ||
2473 | |||
2474 | k00_20 = e0[-6] - e2[-6]; | ||
2475 | k01_21 = e0[-7] - e2[-7]; | ||
2476 | e0[-6] += e2[-6];//e0[-6] = e0[-6] + e2[-6]; | ||
2477 | e0[-7] += e2[-7];//e0[-7] = e0[-7] + e2[-7]; | ||
2478 | e2[-6] = (k00_20)*A[0] - (k01_21) * A[1]; | ||
2479 | e2[-7] = (k01_21)*A[0] + (k00_20) * A[1]; | ||
2480 | |||
2481 | e0 -= 8; | ||
2482 | e2 -= 8; | ||
2483 | |||
2484 | A += k1; | ||
2485 | } | ||
2486 | } | ||
2487 | |||
2488 | static void imdct_step3_inner_s_loop(int n, float *e, int i_off, int k_off, float *A, int a_off, int k0) | ||
2489 | { | ||
2490 | int i; | ||
2491 | float A0 = A[0]; | ||
2492 | float A1 = A[0+1]; | ||
2493 | float A2 = A[0+a_off]; | ||
2494 | float A3 = A[0+a_off+1]; | ||
2495 | float A4 = A[0+a_off*2+0]; | ||
2496 | float A5 = A[0+a_off*2+1]; | ||
2497 | float A6 = A[0+a_off*3+0]; | ||
2498 | float A7 = A[0+a_off*3+1]; | ||
2499 | |||
2500 | float k00,k11; | ||
2501 | |||
2502 | float *ee0 = e +i_off; | ||
2503 | float *ee2 = ee0+k_off; | ||
2504 | |||
2505 | for (i=n; i > 0; --i) { | ||
2506 | k00 = ee0[ 0] - ee2[ 0]; | ||
2507 | k11 = ee0[-1] - ee2[-1]; | ||
2508 | ee0[ 0] = ee0[ 0] + ee2[ 0]; | ||
2509 | ee0[-1] = ee0[-1] + ee2[-1]; | ||
2510 | ee2[ 0] = (k00) * A0 - (k11) * A1; | ||
2511 | ee2[-1] = (k11) * A0 + (k00) * A1; | ||
2512 | |||
2513 | k00 = ee0[-2] - ee2[-2]; | ||
2514 | k11 = ee0[-3] - ee2[-3]; | ||
2515 | ee0[-2] = ee0[-2] + ee2[-2]; | ||
2516 | ee0[-3] = ee0[-3] + ee2[-3]; | ||
2517 | ee2[-2] = (k00) * A2 - (k11) * A3; | ||
2518 | ee2[-3] = (k11) * A2 + (k00) * A3; | ||
2519 | |||
2520 | k00 = ee0[-4] - ee2[-4]; | ||
2521 | k11 = ee0[-5] - ee2[-5]; | ||
2522 | ee0[-4] = ee0[-4] + ee2[-4]; | ||
2523 | ee0[-5] = ee0[-5] + ee2[-5]; | ||
2524 | ee2[-4] = (k00) * A4 - (k11) * A5; | ||
2525 | ee2[-5] = (k11) * A4 + (k00) * A5; | ||
2526 | |||
2527 | k00 = ee0[-6] - ee2[-6]; | ||
2528 | k11 = ee0[-7] - ee2[-7]; | ||
2529 | ee0[-6] = ee0[-6] + ee2[-6]; | ||
2530 | ee0[-7] = ee0[-7] + ee2[-7]; | ||
2531 | ee2[-6] = (k00) * A6 - (k11) * A7; | ||
2532 | ee2[-7] = (k11) * A6 + (k00) * A7; | ||
2533 | |||
2534 | ee0 -= k0; | ||
2535 | ee2 -= k0; | ||
2536 | } | ||
2537 | } | ||
2538 | |||
2539 | static __forceinline void iter_54(float *z) | ||
2540 | { | ||
2541 | float k00,k11,k22,k33; | ||
2542 | float y0,y1,y2,y3; | ||
2543 | |||
2544 | k00 = z[ 0] - z[-4]; | ||
2545 | y0 = z[ 0] + z[-4]; | ||
2546 | y2 = z[-2] + z[-6]; | ||
2547 | k22 = z[-2] - z[-6]; | ||
2548 | |||
2549 | z[-0] = y0 + y2; // z0 + z4 + z2 + z6 | ||
2550 | z[-2] = y0 - y2; // z0 + z4 - z2 - z6 | ||
2551 | |||
2552 | // done with y0,y2 | ||
2553 | |||
2554 | k33 = z[-3] - z[-7]; | ||
2555 | |||
2556 | z[-4] = k00 + k33; // z0 - z4 + z3 - z7 | ||
2557 | z[-6] = k00 - k33; // z0 - z4 - z3 + z7 | ||
2558 | |||
2559 | // done with k33 | ||
2560 | |||
2561 | k11 = z[-1] - z[-5]; | ||
2562 | y1 = z[-1] + z[-5]; | ||
2563 | y3 = z[-3] + z[-7]; | ||
2564 | |||
2565 | z[-1] = y1 + y3; // z1 + z5 + z3 + z7 | ||
2566 | z[-3] = y1 - y3; // z1 + z5 - z3 - z7 | ||
2567 | z[-5] = k11 - k22; // z1 - z5 + z2 - z6 | ||
2568 | z[-7] = k11 + k22; // z1 - z5 - z2 + z6 | ||
2569 | } | ||
2570 | |||
2571 | static void imdct_step3_inner_s_loop_ld654(int n, float *e, int i_off, float *A, int base_n) | ||
2572 | { | ||
2573 | int a_off = base_n >> 3; | ||
2574 | float A2 = A[0+a_off]; | ||
2575 | float *z = e + i_off; | ||
2576 | float *base = z - 16 * n; | ||
2577 | |||
2578 | while (z > base) { | ||
2579 | float k00,k11; | ||
2580 | |||
2581 | k00 = z[-0] - z[-8]; | ||
2582 | k11 = z[-1] - z[-9]; | ||
2583 | z[-0] = z[-0] + z[-8]; | ||
2584 | z[-1] = z[-1] + z[-9]; | ||
2585 | z[-8] = k00; | ||
2586 | z[-9] = k11 ; | ||
2587 | |||
2588 | k00 = z[ -2] - z[-10]; | ||
2589 | k11 = z[ -3] - z[-11]; | ||
2590 | z[ -2] = z[ -2] + z[-10]; | ||
2591 | z[ -3] = z[ -3] + z[-11]; | ||
2592 | z[-10] = (k00+k11) * A2; | ||
2593 | z[-11] = (k11-k00) * A2; | ||
2594 | |||
2595 | k00 = z[-12] - z[ -4]; // reverse to avoid a unary negation | ||
2596 | k11 = z[ -5] - z[-13]; | ||
2597 | z[ -4] = z[ -4] + z[-12]; | ||
2598 | z[ -5] = z[ -5] + z[-13]; | ||
2599 | z[-12] = k11; | ||
2600 | z[-13] = k00; | ||
2601 | |||
2602 | k00 = z[-14] - z[ -6]; // reverse to avoid a unary negation | ||
2603 | k11 = z[ -7] - z[-15]; | ||
2604 | z[ -6] = z[ -6] + z[-14]; | ||
2605 | z[ -7] = z[ -7] + z[-15]; | ||
2606 | z[-14] = (k00+k11) * A2; | ||
2607 | z[-15] = (k00-k11) * A2; | ||
2608 | |||
2609 | iter_54(z); | ||
2610 | iter_54(z-8); | ||
2611 | z -= 16; | ||
2612 | } | ||
2613 | } | ||
2614 | |||
2615 | static void inverse_mdct(float *buffer, int n, vorb *f, int blocktype) | ||
2616 | { | ||
2617 | int n2 = n >> 1, n4 = n >> 2, n8 = n >> 3, l; | ||
2618 | int ld; | ||
2619 | // @OPTIMIZE: reduce register pressure by using fewer variables? | ||
2620 | int save_point = temp_alloc_save(f); | ||
2621 | float *buf2 = (float *) temp_alloc(f, n2 * sizeof(*buf2)); | ||
2622 | float *u=NULL,*v=NULL; | ||
2623 | // twiddle factors | ||
2624 | float *A = f->A[blocktype]; | ||
2625 | |||
2626 | // IMDCT algorithm from "The use of multirate filter banks for coding of high quality digital audio" | ||
2627 | // See notes about bugs in that paper in less-optimal implementation 'inverse_mdct_old' after this function. | ||
2628 | |||
2629 | // kernel from paper | ||
2630 | |||
2631 | |||
2632 | // merged: | ||
2633 | // copy and reflect spectral data | ||
2634 | // step 0 | ||
2635 | |||
2636 | // note that it turns out that the items added together during | ||
2637 | // this step are, in fact, being added to themselves (as reflected | ||
2638 | // by step 0). inexplicable inefficiency! this became obvious | ||
2639 | // once I combined the passes. | ||
2640 | |||
2641 | // so there's a missing 'times 2' here (for adding X to itself). | ||
2642 | // this propagates through linearly to the end, where the numbers | ||
2643 | // are 1/2 too small, and need to be compensated for. | ||
2644 | |||
2645 | { | ||
2646 | float *d,*e, *AA, *e_stop; | ||
2647 | d = &buf2[n2-2]; | ||
2648 | AA = A; | ||
2649 | e = &buffer[0]; | ||
2650 | e_stop = &buffer[n2]; | ||
2651 | while (e != e_stop) { | ||
2652 | d[1] = (e[0] * AA[0] - e[2]*AA[1]); | ||
2653 | d[0] = (e[0] * AA[1] + e[2]*AA[0]); | ||
2654 | d -= 2; | ||
2655 | AA += 2; | ||
2656 | e += 4; | ||
2657 | } | ||
2658 | |||
2659 | e = &buffer[n2-3]; | ||
2660 | while (d >= buf2) { | ||
2661 | d[1] = (-e[2] * AA[0] - -e[0]*AA[1]); | ||
2662 | d[0] = (-e[2] * AA[1] + -e[0]*AA[0]); | ||
2663 | d -= 2; | ||
2664 | AA += 2; | ||
2665 | e -= 4; | ||
2666 | } | ||
2667 | } | ||
2668 | |||
2669 | // now we use symbolic names for these, so that we can | ||
2670 | // possibly swap their meaning as we change which operations | ||
2671 | // are in place | ||
2672 | |||
2673 | u = buffer; | ||
2674 | v = buf2; | ||
2675 | |||
2676 | // step 2 (paper output is w, now u) | ||
2677 | // this could be in place, but the data ends up in the wrong | ||
2678 | // place... _somebody_'s got to swap it, so this is nominated | ||
2679 | { | ||
2680 | float *AA = &A[n2-8]; | ||
2681 | float *d0,*d1, *e0, *e1; | ||
2682 | |||
2683 | e0 = &v[n4]; | ||
2684 | e1 = &v[0]; | ||
2685 | |||
2686 | d0 = &u[n4]; | ||
2687 | d1 = &u[0]; | ||
2688 | |||
2689 | while (AA >= A) { | ||
2690 | float v40_20, v41_21; | ||
2691 | |||
2692 | v41_21 = e0[1] - e1[1]; | ||
2693 | v40_20 = e0[0] - e1[0]; | ||
2694 | d0[1] = e0[1] + e1[1]; | ||
2695 | d0[0] = e0[0] + e1[0]; | ||
2696 | d1[1] = v41_21*AA[4] - v40_20*AA[5]; | ||
2697 | d1[0] = v40_20*AA[4] + v41_21*AA[5]; | ||
2698 | |||
2699 | v41_21 = e0[3] - e1[3]; | ||
2700 | v40_20 = e0[2] - e1[2]; | ||
2701 | d0[3] = e0[3] + e1[3]; | ||
2702 | d0[2] = e0[2] + e1[2]; | ||
2703 | d1[3] = v41_21*AA[0] - v40_20*AA[1]; | ||
2704 | d1[2] = v40_20*AA[0] + v41_21*AA[1]; | ||
2705 | |||
2706 | AA -= 8; | ||
2707 | |||
2708 | d0 += 4; | ||
2709 | d1 += 4; | ||
2710 | e0 += 4; | ||
2711 | e1 += 4; | ||
2712 | } | ||
2713 | } | ||
2714 | |||
2715 | // step 3 | ||
2716 | ld = ilog(n) - 1; // ilog is off-by-one from normal definitions | ||
2717 | |||
2718 | // optimized step 3: | ||
2719 | |||
2720 | // the original step3 loop can be nested r inside s or s inside r; | ||
2721 | // it's written originally as s inside r, but this is dumb when r | ||
2722 | // iterates many times, and s few. So I have two copies of it and | ||
2723 | // switch between them halfway. | ||
2724 | |||
2725 | // this is iteration 0 of step 3 | ||
2726 | imdct_step3_iter0_loop(n >> 4, u, n2-1-n4*0, -(n >> 3), A); | ||
2727 | imdct_step3_iter0_loop(n >> 4, u, n2-1-n4*1, -(n >> 3), A); | ||
2728 | |||
2729 | // this is iteration 1 of step 3 | ||
2730 | imdct_step3_inner_r_loop(n >> 5, u, n2-1 - n8*0, -(n >> 4), A, 16); | ||
2731 | imdct_step3_inner_r_loop(n >> 5, u, n2-1 - n8*1, -(n >> 4), A, 16); | ||
2732 | imdct_step3_inner_r_loop(n >> 5, u, n2-1 - n8*2, -(n >> 4), A, 16); | ||
2733 | imdct_step3_inner_r_loop(n >> 5, u, n2-1 - n8*3, -(n >> 4), A, 16); | ||
2734 | |||
2735 | l=2; | ||
2736 | for (; l < (ld-3)>>1; ++l) { | ||
2737 | int k0 = n >> (l+2), k0_2 = k0>>1; | ||
2738 | int lim = 1 << (l+1); | ||
2739 | int i; | ||
2740 | for (i=0; i < lim; ++i) | ||
2741 | imdct_step3_inner_r_loop(n >> (l+4), u, n2-1 - k0*i, -k0_2, A, 1 << (l+3)); | ||
2742 | } | ||
2743 | |||
2744 | for (; l < ld-6; ++l) { | ||
2745 | int k0 = n >> (l+2), k1 = 1 << (l+3), k0_2 = k0>>1; | ||
2746 | int rlim = n >> (l+6), r; | ||
2747 | int lim = 1 << (l+1); | ||
2748 | int i_off; | ||
2749 | float *A0 = A; | ||
2750 | i_off = n2-1; | ||
2751 | for (r=rlim; r > 0; --r) { | ||
2752 | imdct_step3_inner_s_loop(lim, u, i_off, -k0_2, A0, k1, k0); | ||
2753 | A0 += k1*4; | ||
2754 | i_off -= 8; | ||
2755 | } | ||
2756 | } | ||
2757 | |||
2758 | // iterations with count: | ||
2759 | // ld-6,-5,-4 all interleaved together | ||
2760 | // the big win comes from getting rid of needless flops | ||
2761 | // due to the constants on pass 5 & 4 being all 1 and 0; | ||
2762 | // combining them to be simultaneous to improve cache made little difference | ||
2763 | imdct_step3_inner_s_loop_ld654(n >> 5, u, n2-1, A, n); | ||
2764 | |||
2765 | // output is u | ||
2766 | |||
2767 | // step 4, 5, and 6 | ||
2768 | // cannot be in-place because of step 5 | ||
2769 | { | ||
2770 | uint16 *bitrev = f->bit_reverse[blocktype]; | ||
2771 | // weirdly, I'd have thought reading sequentially and writing | ||
2772 | // erratically would have been better than vice-versa, but in | ||
2773 | // fact that's not what my testing showed. (That is, with | ||
2774 | // j = bitreverse(i), do you read i and write j, or read j and write i.) | ||
2775 | |||
2776 | float *d0 = &v[n4-4]; | ||
2777 | float *d1 = &v[n2-4]; | ||
2778 | while (d0 >= v) { | ||
2779 | int k4; | ||
2780 | |||
2781 | k4 = bitrev[0]; | ||
2782 | d1[3] = u[k4+0]; | ||
2783 | d1[2] = u[k4+1]; | ||
2784 | d0[3] = u[k4+2]; | ||
2785 | d0[2] = u[k4+3]; | ||
2786 | |||
2787 | k4 = bitrev[1]; | ||
2788 | d1[1] = u[k4+0]; | ||
2789 | d1[0] = u[k4+1]; | ||
2790 | d0[1] = u[k4+2]; | ||
2791 | d0[0] = u[k4+3]; | ||
2792 | |||
2793 | d0 -= 4; | ||
2794 | d1 -= 4; | ||
2795 | bitrev += 2; | ||
2796 | } | ||
2797 | } | ||
2798 | // (paper output is u, now v) | ||
2799 | |||
2800 | |||
2801 | // data must be in buf2 | ||
2802 | assert(v == buf2); | ||
2803 | |||
2804 | // step 7 (paper output is v, now v) | ||
2805 | // this is now in place | ||
2806 | { | ||
2807 | float *C = f->C[blocktype]; | ||
2808 | float *d, *e; | ||
2809 | |||
2810 | d = v; | ||
2811 | e = v + n2 - 4; | ||
2812 | |||
2813 | while (d < e) { | ||
2814 | float a02,a11,b0,b1,b2,b3; | ||
2815 | |||
2816 | a02 = d[0] - e[2]; | ||
2817 | a11 = d[1] + e[3]; | ||
2818 | |||
2819 | b0 = C[1]*a02 + C[0]*a11; | ||
2820 | b1 = C[1]*a11 - C[0]*a02; | ||
2821 | |||
2822 | b2 = d[0] + e[ 2]; | ||
2823 | b3 = d[1] - e[ 3]; | ||
2824 | |||
2825 | d[0] = b2 + b0; | ||
2826 | d[1] = b3 + b1; | ||
2827 | e[2] = b2 - b0; | ||
2828 | e[3] = b1 - b3; | ||
2829 | |||
2830 | a02 = d[2] - e[0]; | ||
2831 | a11 = d[3] + e[1]; | ||
2832 | |||
2833 | b0 = C[3]*a02 + C[2]*a11; | ||
2834 | b1 = C[3]*a11 - C[2]*a02; | ||
2835 | |||
2836 | b2 = d[2] + e[ 0]; | ||
2837 | b3 = d[3] - e[ 1]; | ||
2838 | |||
2839 | d[2] = b2 + b0; | ||
2840 | d[3] = b3 + b1; | ||
2841 | e[0] = b2 - b0; | ||
2842 | e[1] = b1 - b3; | ||
2843 | |||
2844 | C += 4; | ||
2845 | d += 4; | ||
2846 | e -= 4; | ||
2847 | } | ||
2848 | } | ||
2849 | |||
2850 | // data must be in buf2 | ||
2851 | |||
2852 | |||
2853 | // step 8+decode (paper output is X, now buffer) | ||
2854 | // this generates pairs of data a la 8 and pushes them directly through | ||
2855 | // the decode kernel (pushing rather than pulling) to avoid having | ||
2856 | // to make another pass later | ||
2857 | |||
2858 | // this cannot POSSIBLY be in place, so we refer to the buffers directly | ||
2859 | |||
2860 | { | ||
2861 | float *d0,*d1,*d2,*d3; | ||
2862 | |||
2863 | float *B = f->B[blocktype] + n2 - 8; | ||
2864 | float *e = buf2 + n2 - 8; | ||
2865 | d0 = &buffer[0]; | ||
2866 | d1 = &buffer[n2-4]; | ||
2867 | d2 = &buffer[n2]; | ||
2868 | d3 = &buffer[n-4]; | ||
2869 | while (e >= v) { | ||
2870 | float p0,p1,p2,p3; | ||
2871 | |||
2872 | p3 = e[6]*B[7] - e[7]*B[6]; | ||
2873 | p2 = -e[6]*B[6] - e[7]*B[7]; | ||
2874 | |||
2875 | d0[0] = p3; | ||
2876 | d1[3] = - p3; | ||
2877 | d2[0] = p2; | ||
2878 | d3[3] = p2; | ||
2879 | |||
2880 | p1 = e[4]*B[5] - e[5]*B[4]; | ||
2881 | p0 = -e[4]*B[4] - e[5]*B[5]; | ||
2882 | |||
2883 | d0[1] = p1; | ||
2884 | d1[2] = - p1; | ||
2885 | d2[1] = p0; | ||
2886 | d3[2] = p0; | ||
2887 | |||
2888 | p3 = e[2]*B[3] - e[3]*B[2]; | ||
2889 | p2 = -e[2]*B[2] - e[3]*B[3]; | ||
2890 | |||
2891 | d0[2] = p3; | ||
2892 | d1[1] = - p3; | ||
2893 | d2[2] = p2; | ||
2894 | d3[1] = p2; | ||
2895 | |||
2896 | p1 = e[0]*B[1] - e[1]*B[0]; | ||
2897 | p0 = -e[0]*B[0] - e[1]*B[1]; | ||
2898 | |||
2899 | d0[3] = p1; | ||
2900 | d1[0] = - p1; | ||
2901 | d2[3] = p0; | ||
2902 | d3[0] = p0; | ||
2903 | |||
2904 | B -= 8; | ||
2905 | e -= 8; | ||
2906 | d0 += 4; | ||
2907 | d2 += 4; | ||
2908 | d1 -= 4; | ||
2909 | d3 -= 4; | ||
2910 | } | ||
2911 | } | ||
2912 | |||
2913 | temp_free(f,buf2); | ||
2914 | temp_alloc_restore(f,save_point); | ||
2915 | } | ||
2916 | |||
2917 | #if 0 | ||
2918 | // this is the original version of the above code, if you want to optimize it from scratch | ||
2919 | void inverse_mdct_naive(float *buffer, int n) | ||
2920 | { | ||
2921 | float s; | ||
2922 | float A[1 << 12], B[1 << 12], C[1 << 11]; | ||
2923 | int i,k,k2,k4, n2 = n >> 1, n4 = n >> 2, n8 = n >> 3, l; | ||
2924 | int n3_4 = n - n4, ld; | ||
2925 | // how can they claim this only uses N words?! | ||
2926 | // oh, because they're only used sparsely, whoops | ||
2927 | float u[1 << 13], X[1 << 13], v[1 << 13], w[1 << 13]; | ||
2928 | // set up twiddle factors | ||
2929 | |||
2930 | for (k=k2=0; k < n4; ++k,k2+=2) { | ||
2931 | A[k2 ] = (float) cos(4*k*M_PI/n); | ||
2932 | A[k2+1] = (float) -sin(4*k*M_PI/n); | ||
2933 | B[k2 ] = (float) cos((k2+1)*M_PI/n/2); | ||
2934 | B[k2+1] = (float) sin((k2+1)*M_PI/n/2); | ||
2935 | } | ||
2936 | for (k=k2=0; k < n8; ++k,k2+=2) { | ||
2937 | C[k2 ] = (float) cos(2*(k2+1)*M_PI/n); | ||
2938 | C[k2+1] = (float) -sin(2*(k2+1)*M_PI/n); | ||
2939 | } | ||
2940 | |||
2941 | // IMDCT algorithm from "The use of multirate filter banks for coding of high quality digital audio" | ||
2942 | // Note there are bugs in that pseudocode, presumably due to them attempting | ||
2943 | // to rename the arrays nicely rather than representing the way their actual | ||
2944 | // implementation bounces buffers back and forth. As a result, even in the | ||
2945 | // "some formulars corrected" version, a direct implementation fails. These | ||
2946 | // are noted below as "paper bug". | ||
2947 | |||
2948 | // copy and reflect spectral data | ||
2949 | for (k=0; k < n2; ++k) u[k] = buffer[k]; | ||
2950 | for ( ; k < n ; ++k) u[k] = -buffer[n - k - 1]; | ||
2951 | // kernel from paper | ||
2952 | // step 1 | ||
2953 | for (k=k2=k4=0; k < n4; k+=1, k2+=2, k4+=4) { | ||
2954 | v[n-k4-1] = (u[k4] - u[n-k4-1]) * A[k2] - (u[k4+2] - u[n-k4-3])*A[k2+1]; | ||
2955 | v[n-k4-3] = (u[k4] - u[n-k4-1]) * A[k2+1] + (u[k4+2] - u[n-k4-3])*A[k2]; | ||
2956 | } | ||
2957 | // step 2 | ||
2958 | for (k=k4=0; k < n8; k+=1, k4+=4) { | ||
2959 | w[n2+3+k4] = v[n2+3+k4] + v[k4+3]; | ||
2960 | w[n2+1+k4] = v[n2+1+k4] + v[k4+1]; | ||
2961 | w[k4+3] = (v[n2+3+k4] - v[k4+3])*A[n2-4-k4] - (v[n2+1+k4]-v[k4+1])*A[n2-3-k4]; | ||
2962 | w[k4+1] = (v[n2+1+k4] - v[k4+1])*A[n2-4-k4] + (v[n2+3+k4]-v[k4+3])*A[n2-3-k4]; | ||
2963 | } | ||
2964 | // step 3 | ||
2965 | ld = ilog(n) - 1; // ilog is off-by-one from normal definitions | ||
2966 | for (l=0; l < ld-3; ++l) { | ||
2967 | int k0 = n >> (l+2), k1 = 1 << (l+3); | ||
2968 | int rlim = n >> (l+4), r4, r; | ||
2969 | int s2lim = 1 << (l+2), s2; | ||
2970 | for (r=r4=0; r < rlim; r4+=4,++r) { | ||
2971 | for (s2=0; s2 < s2lim; s2+=2) { | ||
2972 | u[n-1-k0*s2-r4] = w[n-1-k0*s2-r4] + w[n-1-k0*(s2+1)-r4]; | ||
2973 | u[n-3-k0*s2-r4] = w[n-3-k0*s2-r4] + w[n-3-k0*(s2+1)-r4]; | ||
2974 | u[n-1-k0*(s2+1)-r4] = (w[n-1-k0*s2-r4] - w[n-1-k0*(s2+1)-r4]) * A[r*k1] | ||
2975 | - (w[n-3-k0*s2-r4] - w[n-3-k0*(s2+1)-r4]) * A[r*k1+1]; | ||
2976 | u[n-3-k0*(s2+1)-r4] = (w[n-3-k0*s2-r4] - w[n-3-k0*(s2+1)-r4]) * A[r*k1] | ||
2977 | + (w[n-1-k0*s2-r4] - w[n-1-k0*(s2+1)-r4]) * A[r*k1+1]; | ||
2978 | } | ||
2979 | } | ||
2980 | if (l+1 < ld-3) { | ||
2981 | // paper bug: ping-ponging of u&w here is omitted | ||
2982 | memcpy(w, u, sizeof(u)); | ||
2983 | } | ||
2984 | } | ||
2985 | |||
2986 | // step 4 | ||
2987 | for (i=0; i < n8; ++i) { | ||
2988 | int j = bit_reverse(i) >> (32-ld+3); | ||
2989 | assert(j < n8); | ||
2990 | if (i == j) { | ||
2991 | // paper bug: original code probably swapped in place; if copying, | ||
2992 | // need to directly copy in this case | ||
2993 | int i8 = i << 3; | ||
2994 | v[i8+1] = u[i8+1]; | ||
2995 | v[i8+3] = u[i8+3]; | ||
2996 | v[i8+5] = u[i8+5]; | ||
2997 | v[i8+7] = u[i8+7]; | ||
2998 | } else if (i < j) { | ||
2999 | int i8 = i << 3, j8 = j << 3; | ||
3000 | v[j8+1] = u[i8+1], v[i8+1] = u[j8 + 1]; | ||
3001 | v[j8+3] = u[i8+3], v[i8+3] = u[j8 + 3]; | ||
3002 | v[j8+5] = u[i8+5], v[i8+5] = u[j8 + 5]; | ||
3003 | v[j8+7] = u[i8+7], v[i8+7] = u[j8 + 7]; | ||
3004 | } | ||
3005 | } | ||
3006 | // step 5 | ||
3007 | for (k=0; k < n2; ++k) { | ||
3008 | w[k] = v[k*2+1]; | ||
3009 | } | ||
3010 | // step 6 | ||
3011 | for (k=k2=k4=0; k < n8; ++k, k2 += 2, k4 += 4) { | ||
3012 | u[n-1-k2] = w[k4]; | ||
3013 | u[n-2-k2] = w[k4+1]; | ||
3014 | u[n3_4 - 1 - k2] = w[k4+2]; | ||
3015 | u[n3_4 - 2 - k2] = w[k4+3]; | ||
3016 | } | ||
3017 | // step 7 | ||
3018 | for (k=k2=0; k < n8; ++k, k2 += 2) { | ||
3019 | v[n2 + k2 ] = ( u[n2 + k2] + u[n-2-k2] + C[k2+1]*(u[n2+k2]-u[n-2-k2]) + C[k2]*(u[n2+k2+1]+u[n-2-k2+1]))/2; | ||
3020 | v[n-2 - k2] = ( u[n2 + k2] + u[n-2-k2] - C[k2+1]*(u[n2+k2]-u[n-2-k2]) - C[k2]*(u[n2+k2+1]+u[n-2-k2+1]))/2; | ||
3021 | v[n2+1+ k2] = ( u[n2+1+k2] - u[n-1-k2] + C[k2+1]*(u[n2+1+k2]+u[n-1-k2]) - C[k2]*(u[n2+k2]-u[n-2-k2]))/2; | ||
3022 | v[n-1 - k2] = (-u[n2+1+k2] + u[n-1-k2] + C[k2+1]*(u[n2+1+k2]+u[n-1-k2]) - C[k2]*(u[n2+k2]-u[n-2-k2]))/2; | ||
3023 | } | ||
3024 | // step 8 | ||
3025 | for (k=k2=0; k < n4; ++k,k2 += 2) { | ||
3026 | X[k] = v[k2+n2]*B[k2 ] + v[k2+1+n2]*B[k2+1]; | ||
3027 | X[n2-1-k] = v[k2+n2]*B[k2+1] - v[k2+1+n2]*B[k2 ]; | ||
3028 | } | ||
3029 | |||
3030 | // decode kernel to output | ||
3031 | // determined the following value experimentally | ||
3032 | // (by first figuring out what made inverse_mdct_slow work); then matching that here | ||
3033 | // (probably vorbis encoder premultiplies by n or n/2, to save it on the decoder?) | ||
3034 | s = 0.5; // theoretically would be n4 | ||
3035 | |||
3036 | // [[[ note! the s value of 0.5 is compensated for by the B[] in the current code, | ||
3037 | // so it needs to use the "old" B values to behave correctly, or else | ||
3038 | // set s to 1.0 ]]] | ||
3039 | for (i=0; i < n4 ; ++i) buffer[i] = s * X[i+n4]; | ||
3040 | for ( ; i < n3_4; ++i) buffer[i] = -s * X[n3_4 - i - 1]; | ||
3041 | for ( ; i < n ; ++i) buffer[i] = -s * X[i - n3_4]; | ||
3042 | } | ||
3043 | #endif | ||
3044 | |||
3045 | static float *get_window(vorb *f, int len) | ||
3046 | { | ||
3047 | len <<= 1; | ||
3048 | if (len == f->blocksize_0) return f->window[0]; | ||
3049 | if (len == f->blocksize_1) return f->window[1]; | ||
3050 | return NULL; | ||
3051 | } | ||
3052 | |||
3053 | #ifndef STB_VORBIS_NO_DEFER_FLOOR | ||
3054 | typedef int16 YTYPE; | ||
3055 | #else | ||
3056 | typedef int YTYPE; | ||
3057 | #endif | ||
3058 | static int do_floor(vorb *f, Mapping *map, int i, int n, float *target, YTYPE *finalY, uint8 *step2_flag) | ||
3059 | { | ||
3060 | int n2 = n >> 1; | ||
3061 | int s = map->chan[i].mux, floor; | ||
3062 | floor = map->submap_floor[s]; | ||
3063 | if (f->floor_types[floor] == 0) { | ||
3064 | return error(f, VORBIS_invalid_stream); | ||
3065 | } else { | ||
3066 | Floor1 *g = &f->floor_config[floor].floor1; | ||
3067 | int j,q; | ||
3068 | int lx = 0, ly = finalY[0] * g->floor1_multiplier; | ||
3069 | for (q=1; q < g->values; ++q) { | ||
3070 | j = g->sorted_order[q]; | ||
3071 | #ifndef STB_VORBIS_NO_DEFER_FLOOR | ||
3072 | if (finalY[j] >= 0) | ||
3073 | #else | ||
3074 | if (step2_flag[j]) | ||
3075 | #endif | ||
3076 | { | ||
3077 | int hy = finalY[j] * g->floor1_multiplier; | ||
3078 | int hx = g->Xlist[j]; | ||
3079 | if (lx != hx) | ||
3080 | draw_line(target, lx,ly, hx,hy, n2); | ||
3081 | CHECK(f); | ||
3082 | lx = hx, ly = hy; | ||
3083 | } | ||
3084 | } | ||
3085 | if (lx < n2) { | ||
3086 | // optimization of: draw_line(target, lx,ly, n,ly, n2); | ||
3087 | for (j=lx; j < n2; ++j) | ||
3088 | LINE_OP(target[j], inverse_db_table[ly]); | ||
3089 | CHECK(f); | ||
3090 | } | ||
3091 | } | ||
3092 | return TRUE; | ||
3093 | } | ||
3094 | |||
3095 | // The meaning of "left" and "right" | ||
3096 | // | ||
3097 | // For a given frame: | ||
3098 | // we compute samples from 0..n | ||
3099 | // window_center is n/2 | ||
3100 | // we'll window and mix the samples from left_start to left_end with data from the previous frame | ||
3101 | // all of the samples from left_end to right_start can be output without mixing; however, | ||
3102 | // this interval is 0-length except when transitioning between short and long frames | ||
3103 | // all of the samples from right_start to right_end need to be mixed with the next frame, | ||
3104 | // which we don't have, so those get saved in a buffer | ||
3105 | // frame N's right_end-right_start, the number of samples to mix with the next frame, | ||
3106 | // has to be the same as frame N+1's left_end-left_start (which they are by | ||
3107 | // construction) | ||
3108 | |||
3109 | static int vorbis_decode_initial(vorb *f, int *p_left_start, int *p_left_end, int *p_right_start, int *p_right_end, int *mode) | ||
3110 | { | ||
3111 | Mode *m; | ||
3112 | int i, n, prev, next, window_center; | ||
3113 | f->channel_buffer_start = f->channel_buffer_end = 0; | ||
3114 | |||
3115 | retry: | ||
3116 | if (f->eof) return FALSE; | ||
3117 | if (!maybe_start_packet(f)) | ||
3118 | return FALSE; | ||
3119 | // check packet type | ||
3120 | if (get_bits(f,1) != 0) { | ||
3121 | if (IS_PUSH_MODE(f)) | ||
3122 | return error(f,VORBIS_bad_packet_type); | ||
3123 | while (EOP != get8_packet(f)); | ||
3124 | goto retry; | ||
3125 | } | ||
3126 | |||
3127 | if (f->alloc.alloc_buffer) | ||
3128 | assert(f->alloc.alloc_buffer_length_in_bytes == f->temp_offset); | ||
3129 | |||
3130 | i = get_bits(f, ilog(f->mode_count-1)); | ||
3131 | if (i == EOP) return FALSE; | ||
3132 | if (i >= f->mode_count) return FALSE; | ||
3133 | *mode = i; | ||
3134 | m = f->mode_config + i; | ||
3135 | if (m->blockflag) { | ||
3136 | n = f->blocksize_1; | ||
3137 | prev = get_bits(f,1); | ||
3138 | next = get_bits(f,1); | ||
3139 | } else { | ||
3140 | prev = next = 0; | ||
3141 | n = f->blocksize_0; | ||
3142 | } | ||
3143 | |||
3144 | // WINDOWING | ||
3145 | |||
3146 | window_center = n >> 1; | ||
3147 | if (m->blockflag && !prev) { | ||
3148 | *p_left_start = (n - f->blocksize_0) >> 2; | ||
3149 | *p_left_end = (n + f->blocksize_0) >> 2; | ||
3150 | } else { | ||
3151 | *p_left_start = 0; | ||
3152 | *p_left_end = window_center; | ||
3153 | } | ||
3154 | if (m->blockflag && !next) { | ||
3155 | *p_right_start = (n*3 - f->blocksize_0) >> 2; | ||
3156 | *p_right_end = (n*3 + f->blocksize_0) >> 2; | ||
3157 | } else { | ||
3158 | *p_right_start = window_center; | ||
3159 | *p_right_end = n; | ||
3160 | } | ||
3161 | |||
3162 | return TRUE; | ||
3163 | } | ||
3164 | |||
3165 | static int vorbis_decode_packet_rest(vorb *f, int *len, Mode *m, int left_start, int left_end, int right_start, int right_end, int *p_left) | ||
3166 | { | ||
3167 | Mapping *map; | ||
3168 | int i,j,k,n,n2; | ||
3169 | int zero_channel[256]; | ||
3170 | int really_zero_channel[256]; | ||
3171 | |||
3172 | // WINDOWING | ||
3173 | |||
3174 | n = f->blocksize[m->blockflag]; | ||
3175 | map = &f->mapping[m->mapping]; | ||
3176 | |||
3177 | // FLOORS | ||
3178 | n2 = n >> 1; | ||
3179 | |||
3180 | CHECK(f); | ||
3181 | |||
3182 | for (i=0; i < f->channels; ++i) { | ||
3183 | int s = map->chan[i].mux, floor; | ||
3184 | zero_channel[i] = FALSE; | ||
3185 | floor = map->submap_floor[s]; | ||
3186 | if (f->floor_types[floor] == 0) { | ||
3187 | return error(f, VORBIS_invalid_stream); | ||
3188 | } else { | ||
3189 | Floor1 *g = &f->floor_config[floor].floor1; | ||
3190 | if (get_bits(f, 1)) { | ||
3191 | short *finalY; | ||
3192 | uint8 step2_flag[256]; | ||
3193 | static int range_list[4] = { 256, 128, 86, 64 }; | ||
3194 | int range = range_list[g->floor1_multiplier-1]; | ||
3195 | int offset = 2; | ||
3196 | finalY = f->finalY[i]; | ||
3197 | finalY[0] = get_bits(f, ilog(range)-1); | ||
3198 | finalY[1] = get_bits(f, ilog(range)-1); | ||
3199 | for (j=0; j < g->partitions; ++j) { | ||
3200 | int pclass = g->partition_class_list[j]; | ||
3201 | int cdim = g->class_dimensions[pclass]; | ||
3202 | int cbits = g->class_subclasses[pclass]; | ||
3203 | int csub = (1 << cbits)-1; | ||
3204 | int cval = 0; | ||
3205 | if (cbits) { | ||
3206 | Codebook *c = f->codebooks + g->class_masterbooks[pclass]; | ||
3207 | DECODE(cval,f,c); | ||
3208 | } | ||
3209 | for (k=0; k < cdim; ++k) { | ||
3210 | int book = g->subclass_books[pclass][cval & csub]; | ||
3211 | cval = cval >> cbits; | ||
3212 | if (book >= 0) { | ||
3213 | int temp; | ||
3214 | Codebook *c = f->codebooks + book; | ||
3215 | DECODE(temp,f,c); | ||
3216 | finalY[offset++] = temp; | ||
3217 | } else | ||
3218 | finalY[offset++] = 0; | ||
3219 | } | ||
3220 | } | ||
3221 | if (f->valid_bits == INVALID_BITS) goto error; // behavior according to spec | ||
3222 | step2_flag[0] = step2_flag[1] = 1; | ||
3223 | for (j=2; j < g->values; ++j) { | ||
3224 | int low, high, pred, highroom, lowroom, room, val; | ||
3225 | low = g->neighbors[j][0]; | ||
3226 | high = g->neighbors[j][1]; | ||
3227 | //neighbors(g->Xlist, j, &low, &high); | ||
3228 | pred = predict_point(g->Xlist[j], g->Xlist[low], g->Xlist[high], finalY[low], finalY[high]); | ||
3229 | val = finalY[j]; | ||
3230 | highroom = range - pred; | ||
3231 | lowroom = pred; | ||
3232 | if (highroom < lowroom) | ||
3233 | room = highroom * 2; | ||
3234 | else | ||
3235 | room = lowroom * 2; | ||
3236 | if (val) { | ||
3237 | step2_flag[low] = step2_flag[high] = 1; | ||
3238 | step2_flag[j] = 1; | ||
3239 | if (val >= room) | ||
3240 | if (highroom > lowroom) | ||
3241 | finalY[j] = val - lowroom + pred; | ||
3242 | else | ||
3243 | finalY[j] = pred - val + highroom - 1; | ||
3244 | else | ||
3245 | if (val & 1) | ||
3246 | finalY[j] = pred - ((val+1)>>1); | ||
3247 | else | ||
3248 | finalY[j] = pred + (val>>1); | ||
3249 | } else { | ||
3250 | step2_flag[j] = 0; | ||
3251 | finalY[j] = pred; | ||
3252 | } | ||
3253 | } | ||
3254 | |||
3255 | #ifdef STB_VORBIS_NO_DEFER_FLOOR | ||
3256 | do_floor(f, map, i, n, f->floor_buffers[i], finalY, step2_flag); | ||
3257 | #else | ||
3258 | // defer final floor computation until _after_ residue | ||
3259 | for (j=0; j < g->values; ++j) { | ||
3260 | if (!step2_flag[j]) | ||
3261 | finalY[j] = -1; | ||
3262 | } | ||
3263 | #endif | ||
3264 | } else { | ||
3265 | error: | ||
3266 | zero_channel[i] = TRUE; | ||
3267 | } | ||
3268 | // So we just defer everything else to later | ||
3269 | |||
3270 | // at this point we've decoded the floor into buffer | ||
3271 | } | ||
3272 | } | ||
3273 | CHECK(f); | ||
3274 | // at this point we've decoded all floors | ||
3275 | |||
3276 | if (f->alloc.alloc_buffer) | ||
3277 | assert(f->alloc.alloc_buffer_length_in_bytes == f->temp_offset); | ||
3278 | |||
3279 | // re-enable coupled channels if necessary | ||
3280 | memcpy(really_zero_channel, zero_channel, sizeof(really_zero_channel[0]) * f->channels); | ||
3281 | for (i=0; i < map->coupling_steps; ++i) | ||
3282 | if (!zero_channel[map->chan[i].magnitude] || !zero_channel[map->chan[i].angle]) { | ||
3283 | zero_channel[map->chan[i].magnitude] = zero_channel[map->chan[i].angle] = FALSE; | ||
3284 | } | ||
3285 | |||
3286 | CHECK(f); | ||
3287 | // RESIDUE DECODE | ||
3288 | for (i=0; i < map->submaps; ++i) { | ||
3289 | float *residue_buffers[STB_VORBIS_MAX_CHANNELS]; | ||
3290 | int r; | ||
3291 | uint8 do_not_decode[256]; | ||
3292 | int ch = 0; | ||
3293 | for (j=0; j < f->channels; ++j) { | ||
3294 | if (map->chan[j].mux == i) { | ||
3295 | if (zero_channel[j]) { | ||
3296 | do_not_decode[ch] = TRUE; | ||
3297 | residue_buffers[ch] = NULL; | ||
3298 | } else { | ||
3299 | do_not_decode[ch] = FALSE; | ||
3300 | residue_buffers[ch] = f->channel_buffers[j]; | ||
3301 | } | ||
3302 | ++ch; | ||
3303 | } | ||
3304 | } | ||
3305 | r = map->submap_residue[i]; | ||
3306 | decode_residue(f, residue_buffers, ch, n2, r, do_not_decode); | ||
3307 | } | ||
3308 | |||
3309 | if (f->alloc.alloc_buffer) | ||
3310 | assert(f->alloc.alloc_buffer_length_in_bytes == f->temp_offset); | ||
3311 | CHECK(f); | ||
3312 | |||
3313 | // INVERSE COUPLING | ||
3314 | for (i = map->coupling_steps-1; i >= 0; --i) { | ||
3315 | int n2 = n >> 1; | ||
3316 | float *m = f->channel_buffers[map->chan[i].magnitude]; | ||
3317 | float *a = f->channel_buffers[map->chan[i].angle ]; | ||
3318 | for (j=0; j < n2; ++j) { | ||
3319 | float a2,m2; | ||
3320 | if (m[j] > 0) | ||
3321 | if (a[j] > 0) | ||
3322 | m2 = m[j], a2 = m[j] - a[j]; | ||
3323 | else | ||
3324 | a2 = m[j], m2 = m[j] + a[j]; | ||
3325 | else | ||
3326 | if (a[j] > 0) | ||
3327 | m2 = m[j], a2 = m[j] + a[j]; | ||
3328 | else | ||
3329 | a2 = m[j], m2 = m[j] - a[j]; | ||
3330 | m[j] = m2; | ||
3331 | a[j] = a2; | ||
3332 | } | ||
3333 | } | ||
3334 | CHECK(f); | ||
3335 | |||
3336 | // finish decoding the floors | ||
3337 | #ifndef STB_VORBIS_NO_DEFER_FLOOR | ||
3338 | for (i=0; i < f->channels; ++i) { | ||
3339 | if (really_zero_channel[i]) { | ||
3340 | memset(f->channel_buffers[i], 0, sizeof(*f->channel_buffers[i]) * n2); | ||
3341 | } else { | ||
3342 | do_floor(f, map, i, n, f->channel_buffers[i], f->finalY[i], NULL); | ||
3343 | } | ||
3344 | } | ||
3345 | #else | ||
3346 | for (i=0; i < f->channels; ++i) { | ||
3347 | if (really_zero_channel[i]) { | ||
3348 | memset(f->channel_buffers[i], 0, sizeof(*f->channel_buffers[i]) * n2); | ||
3349 | } else { | ||
3350 | for (j=0; j < n2; ++j) | ||
3351 | f->channel_buffers[i][j] *= f->floor_buffers[i][j]; | ||
3352 | } | ||
3353 | } | ||
3354 | #endif | ||
3355 | |||
3356 | // INVERSE MDCT | ||
3357 | CHECK(f); | ||
3358 | for (i=0; i < f->channels; ++i) | ||
3359 | inverse_mdct(f->channel_buffers[i], n, f, m->blockflag); | ||
3360 | CHECK(f); | ||
3361 | |||
3362 | // this shouldn't be necessary, unless we exited on an error | ||
3363 | // and want to flush to get to the next packet | ||
3364 | flush_packet(f); | ||
3365 | |||
3366 | if (f->first_decode) { | ||
3367 | // assume we start so first non-discarded sample is sample 0 | ||
3368 | // this isn't to spec, but spec would require us to read ahead | ||
3369 | // and decode the size of all current frames--could be done, | ||
3370 | // but presumably it's not a commonly used feature | ||
3371 | f->current_loc = -n2; // start of first frame is positioned for discard | ||
3372 | // we might have to discard samples "from" the next frame too, | ||
3373 | // if we're lapping a large block then a small at the start? | ||
3374 | f->discard_samples_deferred = n - right_end; | ||
3375 | f->current_loc_valid = TRUE; | ||
3376 | f->first_decode = FALSE; | ||
3377 | } else if (f->discard_samples_deferred) { | ||
3378 | if (f->discard_samples_deferred >= right_start - left_start) { | ||
3379 | f->discard_samples_deferred -= (right_start - left_start); | ||
3380 | left_start = right_start; | ||
3381 | *p_left = left_start; | ||
3382 | } else { | ||
3383 | left_start += f->discard_samples_deferred; | ||
3384 | *p_left = left_start; | ||
3385 | f->discard_samples_deferred = 0; | ||
3386 | } | ||
3387 | } else if (f->previous_length == 0 && f->current_loc_valid) { | ||
3388 | // we're recovering from a seek... that means we're going to discard | ||
3389 | // the samples from this packet even though we know our position from | ||
3390 | // the last page header, so we need to update the position based on | ||
3391 | // the discarded samples here | ||
3392 | // but wait, the code below is going to add this in itself even | ||
3393 | // on a discard, so we don't need to do it here... | ||
3394 | } | ||
3395 | |||
3396 | // check if we have ogg information about the sample # for this packet | ||
3397 | if (f->last_seg_which == f->end_seg_with_known_loc) { | ||
3398 | // if we have a valid current loc, and this is final: | ||
3399 | if (f->current_loc_valid && (f->page_flag & PAGEFLAG_last_page)) { | ||
3400 | uint32 current_end = f->known_loc_for_packet; | ||
3401 | // then let's infer the size of the (probably) short final frame | ||
3402 | if (current_end < f->current_loc + (right_end-left_start)) { | ||
3403 | if (current_end < f->current_loc) { | ||
3404 | // negative truncation, that's impossible! | ||
3405 | *len = 0; | ||
3406 | } else { | ||
3407 | *len = current_end - f->current_loc; | ||
3408 | } | ||
3409 | *len += left_start; // this doesn't seem right, but has no ill effect on my test files | ||
3410 | if (*len > right_end) *len = right_end; // this should never happen | ||
3411 | f->current_loc += *len; | ||
3412 | return TRUE; | ||
3413 | } | ||
3414 | } | ||
3415 | // otherwise, just set our sample loc | ||
3416 | // guess that the ogg granule pos refers to the _middle_ of the | ||
3417 | // last frame? | ||
3418 | // set f->current_loc to the position of left_start | ||
3419 | f->current_loc = f->known_loc_for_packet - (n2-left_start); | ||
3420 | f->current_loc_valid = TRUE; | ||
3421 | } | ||
3422 | if (f->current_loc_valid) | ||
3423 | f->current_loc += (right_start - left_start); | ||
3424 | |||
3425 | if (f->alloc.alloc_buffer) | ||
3426 | assert(f->alloc.alloc_buffer_length_in_bytes == f->temp_offset); | ||
3427 | *len = right_end; // ignore samples after the window goes to 0 | ||
3428 | CHECK(f); | ||
3429 | |||
3430 | return TRUE; | ||
3431 | } | ||
3432 | |||
3433 | static int vorbis_decode_packet(vorb *f, int *len, int *p_left, int *p_right) | ||
3434 | { | ||
3435 | int mode, left_end, right_end; | ||
3436 | if (!vorbis_decode_initial(f, p_left, &left_end, p_right, &right_end, &mode)) return 0; | ||
3437 | return vorbis_decode_packet_rest(f, len, f->mode_config + mode, *p_left, left_end, *p_right, right_end, p_left); | ||
3438 | } | ||
3439 | |||
3440 | static int vorbis_finish_frame(stb_vorbis *f, int len, int left, int right) | ||
3441 | { | ||
3442 | int prev,i,j; | ||
3443 | // we use right&left (the start of the right- and left-window sin()-regions) | ||
3444 | // to determine how much to return, rather than inferring from the rules | ||
3445 | // (same result, clearer code); 'left' indicates where our sin() window | ||
3446 | // starts, therefore where the previous window's right edge starts, and | ||
3447 | // therefore where to start mixing from the previous buffer. 'right' | ||
3448 | // indicates where our sin() ending-window starts, therefore that's where | ||
3449 | // we start saving, and where our returned-data ends. | ||
3450 | |||
3451 | // mixin from previous window | ||
3452 | if (f->previous_length) { | ||
3453 | int i,j, n = f->previous_length; | ||
3454 | float *w = get_window(f, n); | ||
3455 | if (w == NULL) return 0; | ||
3456 | for (i=0; i < f->channels; ++i) { | ||
3457 | for (j=0; j < n; ++j) | ||
3458 | f->channel_buffers[i][left+j] = | ||
3459 | f->channel_buffers[i][left+j]*w[ j] + | ||
3460 | f->previous_window[i][ j]*w[n-1-j]; | ||
3461 | } | ||
3462 | } | ||
3463 | |||
3464 | prev = f->previous_length; | ||
3465 | |||
3466 | // last half of this data becomes previous window | ||
3467 | f->previous_length = len - right; | ||
3468 | |||
3469 | // @OPTIMIZE: could avoid this copy by double-buffering the | ||
3470 | // output (flipping previous_window with channel_buffers), but | ||
3471 | // then previous_window would have to be 2x as large, and | ||
3472 | // channel_buffers couldn't be temp mem (although they're NOT | ||
3473 | // currently temp mem, they could be (unless we want to level | ||
3474 | // performance by spreading out the computation)) | ||
3475 | for (i=0; i < f->channels; ++i) | ||
3476 | for (j=0; right+j < len; ++j) | ||
3477 | f->previous_window[i][j] = f->channel_buffers[i][right+j]; | ||
3478 | |||
3479 | if (!prev) | ||
3480 | // there was no previous packet, so this data isn't valid... | ||
3481 | // this isn't entirely true, only the would-have-overlapped data | ||
3482 | // isn't valid, but this seems to be what the spec requires | ||
3483 | return 0; | ||
3484 | |||
3485 | // truncate a short frame | ||
3486 | if (len < right) right = len; | ||
3487 | |||
3488 | f->samples_output += right-left; | ||
3489 | |||
3490 | return right - left; | ||
3491 | } | ||
3492 | |||
3493 | static int vorbis_pump_first_frame(stb_vorbis *f) | ||
3494 | { | ||
3495 | int len, right, left, res; | ||
3496 | res = vorbis_decode_packet(f, &len, &left, &right); | ||
3497 | if (res) | ||
3498 | vorbis_finish_frame(f, len, left, right); | ||
3499 | return res; | ||
3500 | } | ||
3501 | |||
3502 | #ifndef STB_VORBIS_NO_PUSHDATA_API | ||
3503 | static int is_whole_packet_present(stb_vorbis *f) | ||
3504 | { | ||
3505 | // make sure that we have the packet available before continuing... | ||
3506 | // this requires a full ogg parse, but we know we can fetch from f->stream | ||
3507 | |||
3508 | // instead of coding this out explicitly, we could save the current read state, | ||
3509 | // read the next packet with get8() until end-of-packet, check f->eof, then | ||
3510 | // reset the state? but that would be slower, esp. since we'd have over 256 bytes | ||
3511 | // of state to restore (primarily the page segment table) | ||
3512 | |||
3513 | int s = f->next_seg, first = TRUE; | ||
3514 | uint8 *p = f->stream; | ||
3515 | |||
3516 | if (s != -1) { // if we're not starting the packet with a 'continue on next page' flag | ||
3517 | for (; s < f->segment_count; ++s) { | ||
3518 | p += f->segments[s]; | ||
3519 | if (f->segments[s] < 255) // stop at first short segment | ||
3520 | break; | ||
3521 | } | ||
3522 | // either this continues, or it ends it... | ||
3523 | if (s == f->segment_count) | ||
3524 | s = -1; // set 'crosses page' flag | ||
3525 | if (p > f->stream_end) return error(f, VORBIS_need_more_data); | ||
3526 | first = FALSE; | ||
3527 | } | ||
3528 | for (; s == -1;) { | ||
3529 | uint8 *q; | ||
3530 | int n; | ||
3531 | |||
3532 | // check that we have the page header ready | ||
3533 | if (p + 26 >= f->stream_end) return error(f, VORBIS_need_more_data); | ||
3534 | // validate the page | ||
3535 | if (memcmp(p, ogg_page_header, 4)) return error(f, VORBIS_invalid_stream); | ||
3536 | if (p[4] != 0) return error(f, VORBIS_invalid_stream); | ||
3537 | if (first) { // the first segment must NOT have 'continued_packet', later ones MUST | ||
3538 | if (f->previous_length) | ||
3539 | if ((p[5] & PAGEFLAG_continued_packet)) return error(f, VORBIS_invalid_stream); | ||
3540 | // if no previous length, we're resynching, so we can come in on a continued-packet, | ||
3541 | // which we'll just drop | ||
3542 | } else { | ||
3543 | if (!(p[5] & PAGEFLAG_continued_packet)) return error(f, VORBIS_invalid_stream); | ||
3544 | } | ||
3545 | n = p[26]; // segment counts | ||
3546 | q = p+27; // q points to segment table | ||
3547 | p = q + n; // advance past header | ||
3548 | // make sure we've read the segment table | ||
3549 | if (p > f->stream_end) return error(f, VORBIS_need_more_data); | ||
3550 | for (s=0; s < n; ++s) { | ||
3551 | p += q[s]; | ||
3552 | if (q[s] < 255) | ||
3553 | break; | ||
3554 | } | ||
3555 | if (s == n) | ||
3556 | s = -1; // set 'crosses page' flag | ||
3557 | if (p > f->stream_end) return error(f, VORBIS_need_more_data); | ||
3558 | first = FALSE; | ||
3559 | } | ||
3560 | return TRUE; | ||
3561 | } | ||
3562 | #endif // !STB_VORBIS_NO_PUSHDATA_API | ||
3563 | |||
3564 | static int start_decoder(vorb *f) | ||
3565 | { | ||
3566 | uint8 header[6], x,y; | ||
3567 | int len,i,j,k, max_submaps = 0; | ||
3568 | int longest_floorlist=0; | ||
3569 | |||
3570 | // first page, first packet | ||
3571 | f->first_decode = TRUE; | ||
3572 | |||
3573 | if (!start_page(f)) return FALSE; | ||
3574 | // validate page flag | ||
3575 | if (!(f->page_flag & PAGEFLAG_first_page)) return error(f, VORBIS_invalid_first_page); | ||
3576 | if (f->page_flag & PAGEFLAG_last_page) return error(f, VORBIS_invalid_first_page); | ||
3577 | if (f->page_flag & PAGEFLAG_continued_packet) return error(f, VORBIS_invalid_first_page); | ||
3578 | // check for expected packet length | ||
3579 | if (f->segment_count != 1) return error(f, VORBIS_invalid_first_page); | ||
3580 | if (f->segments[0] != 30) { | ||
3581 | // check for the Ogg skeleton fishead identifying header to refine our error | ||
3582 | if (f->segments[0] == 64 && | ||
3583 | getn(f, header, 6) && | ||
3584 | header[0] == 'f' && | ||
3585 | header[1] == 'i' && | ||
3586 | header[2] == 's' && | ||
3587 | header[3] == 'h' && | ||
3588 | header[4] == 'e' && | ||
3589 | header[5] == 'a' && | ||
3590 | get8(f) == 'd' && | ||
3591 | get8(f) == '\0') return error(f, VORBIS_ogg_skeleton_not_supported); | ||
3592 | else | ||
3593 | return error(f, VORBIS_invalid_first_page); | ||
3594 | } | ||
3595 | |||
3596 | // read packet | ||
3597 | // check packet header | ||
3598 | if (get8(f) != VORBIS_packet_id) return error(f, VORBIS_invalid_first_page); | ||
3599 | if (!getn(f, header, 6)) return error(f, VORBIS_unexpected_eof); | ||
3600 | if (!vorbis_validate(header)) return error(f, VORBIS_invalid_first_page); | ||
3601 | // vorbis_version | ||
3602 | if (get32(f) != 0) return error(f, VORBIS_invalid_first_page); | ||
3603 | f->channels = get8(f); if (!f->channels) return error(f, VORBIS_invalid_first_page); | ||
3604 | if (f->channels > STB_VORBIS_MAX_CHANNELS) return error(f, VORBIS_too_many_channels); | ||
3605 | f->sample_rate = get32(f); if (!f->sample_rate) return error(f, VORBIS_invalid_first_page); | ||
3606 | get32(f); // bitrate_maximum | ||
3607 | get32(f); // bitrate_nominal | ||
3608 | get32(f); // bitrate_minimum | ||
3609 | x = get8(f); | ||
3610 | { | ||
3611 | int log0,log1; | ||
3612 | log0 = x & 15; | ||
3613 | log1 = x >> 4; | ||
3614 | f->blocksize_0 = 1 << log0; | ||
3615 | f->blocksize_1 = 1 << log1; | ||
3616 | if (log0 < 6 || log0 > 13) return error(f, VORBIS_invalid_setup); | ||
3617 | if (log1 < 6 || log1 > 13) return error(f, VORBIS_invalid_setup); | ||
3618 | if (log0 > log1) return error(f, VORBIS_invalid_setup); | ||
3619 | } | ||
3620 | |||
3621 | // framing_flag | ||
3622 | x = get8(f); | ||
3623 | if (!(x & 1)) return error(f, VORBIS_invalid_first_page); | ||
3624 | |||
3625 | // second packet! | ||
3626 | if (!start_page(f)) return FALSE; | ||
3627 | |||
3628 | if (!start_packet(f)) return FALSE; | ||
3629 | |||
3630 | if (!next_segment(f)) return FALSE; | ||
3631 | |||
3632 | if (get8_packet(f) != VORBIS_packet_comment) return error(f, VORBIS_invalid_setup); | ||
3633 | for (i=0; i < 6; ++i) header[i] = get8_packet(f); | ||
3634 | if (!vorbis_validate(header)) return error(f, VORBIS_invalid_setup); | ||
3635 | //file vendor | ||
3636 | len = get32_packet(f); | ||
3637 | f->vendor = (char*)setup_malloc(f, sizeof(char) * (len+1)); | ||
3638 | if (f->vendor == NULL) return error(f, VORBIS_outofmem); | ||
3639 | for(i=0; i < len; ++i) { | ||
3640 | f->vendor[i] = get8_packet(f); | ||
3641 | } | ||
3642 | f->vendor[len] = (char)'\0'; | ||
3643 | //user comments | ||
3644 | f->comment_list_length = get32_packet(f); | ||
3645 | f->comment_list = (char**)setup_malloc(f, sizeof(char*) * (f->comment_list_length)); | ||
3646 | if (f->comment_list == NULL) return error(f, VORBIS_outofmem); | ||
3647 | |||
3648 | for(i=0; i < f->comment_list_length; ++i) { | ||
3649 | len = get32_packet(f); | ||
3650 | f->comment_list[i] = (char*)setup_malloc(f, sizeof(char) * (len+1)); | ||
3651 | if (f->comment_list[i] == NULL) return error(f, VORBIS_outofmem); | ||
3652 | |||
3653 | for(j=0; j < len; ++j) { | ||
3654 | f->comment_list[i][j] = get8_packet(f); | ||
3655 | } | ||
3656 | f->comment_list[i][len] = (char)'\0'; | ||
3657 | } | ||
3658 | |||
3659 | // framing_flag | ||
3660 | x = get8_packet(f); | ||
3661 | if (!(x & 1)) return error(f, VORBIS_invalid_setup); | ||
3662 | |||
3663 | |||
3664 | skip(f, f->bytes_in_seg); | ||
3665 | f->bytes_in_seg = 0; | ||
3666 | |||
3667 | do { | ||
3668 | len = next_segment(f); | ||
3669 | skip(f, len); | ||
3670 | f->bytes_in_seg = 0; | ||
3671 | } while (len); | ||
3672 | |||
3673 | // third packet! | ||
3674 | if (!start_packet(f)) return FALSE; | ||
3675 | |||
3676 | #ifndef STB_VORBIS_NO_PUSHDATA_API | ||
3677 | if (IS_PUSH_MODE(f)) { | ||
3678 | if (!is_whole_packet_present(f)) { | ||
3679 | // convert error in ogg header to write type | ||
3680 | if (f->error == VORBIS_invalid_stream) | ||
3681 | f->error = VORBIS_invalid_setup; | ||
3682 | return FALSE; | ||
3683 | } | ||
3684 | } | ||
3685 | #endif | ||
3686 | |||
3687 | crc32_init(); // always init it, to avoid multithread race conditions | ||
3688 | |||
3689 | if (get8_packet(f) != VORBIS_packet_setup) return error(f, VORBIS_invalid_setup); | ||
3690 | for (i=0; i < 6; ++i) header[i] = get8_packet(f); | ||
3691 | if (!vorbis_validate(header)) return error(f, VORBIS_invalid_setup); | ||
3692 | |||
3693 | // codebooks | ||
3694 | |||
3695 | f->codebook_count = get_bits(f,8) + 1; | ||
3696 | f->codebooks = (Codebook *) setup_malloc(f, sizeof(*f->codebooks) * f->codebook_count); | ||
3697 | if (f->codebooks == NULL) return error(f, VORBIS_outofmem); | ||
3698 | memset(f->codebooks, 0, sizeof(*f->codebooks) * f->codebook_count); | ||
3699 | for (i=0; i < f->codebook_count; ++i) { | ||
3700 | uint32 *values; | ||
3701 | int ordered, sorted_count; | ||
3702 | int total=0; | ||
3703 | uint8 *lengths; | ||
3704 | Codebook *c = f->codebooks+i; | ||
3705 | CHECK(f); | ||
3706 | x = get_bits(f, 8); if (x != 0x42) return error(f, VORBIS_invalid_setup); | ||
3707 | x = get_bits(f, 8); if (x != 0x43) return error(f, VORBIS_invalid_setup); | ||
3708 | x = get_bits(f, 8); if (x != 0x56) return error(f, VORBIS_invalid_setup); | ||
3709 | x = get_bits(f, 8); | ||
3710 | c->dimensions = (get_bits(f, 8)<<8) + x; | ||
3711 | x = get_bits(f, 8); | ||
3712 | y = get_bits(f, 8); | ||
3713 | c->entries = (get_bits(f, 8)<<16) + (y<<8) + x; | ||
3714 | ordered = get_bits(f,1); | ||
3715 | c->sparse = ordered ? 0 : get_bits(f,1); | ||
3716 | |||
3717 | if (c->dimensions == 0 && c->entries != 0) return error(f, VORBIS_invalid_setup); | ||
3718 | |||
3719 | if (c->sparse) | ||
3720 | lengths = (uint8 *) setup_temp_malloc(f, c->entries); | ||
3721 | else | ||
3722 | lengths = c->codeword_lengths = (uint8 *) setup_malloc(f, c->entries); | ||
3723 | |||
3724 | if (!lengths) return error(f, VORBIS_outofmem); | ||
3725 | |||
3726 | if (ordered) { | ||
3727 | int current_entry = 0; | ||
3728 | int current_length = get_bits(f,5) + 1; | ||
3729 | while (current_entry < c->entries) { | ||
3730 | int limit = c->entries - current_entry; | ||
3731 | int n = get_bits(f, ilog(limit)); | ||
3732 | if (current_length >= 32) return error(f, VORBIS_invalid_setup); | ||
3733 | if (current_entry + n > (int) c->entries) { return error(f, VORBIS_invalid_setup); } | ||
3734 | memset(lengths + current_entry, current_length, n); | ||
3735 | current_entry += n; | ||
3736 | ++current_length; | ||
3737 | } | ||
3738 | } else { | ||
3739 | for (j=0; j < c->entries; ++j) { | ||
3740 | int present = c->sparse ? get_bits(f,1) : 1; | ||
3741 | if (present) { | ||
3742 | lengths[j] = get_bits(f, 5) + 1; | ||
3743 | ++total; | ||
3744 | if (lengths[j] == 32) | ||
3745 | return error(f, VORBIS_invalid_setup); | ||
3746 | } else { | ||
3747 | lengths[j] = NO_CODE; | ||
3748 | } | ||
3749 | } | ||
3750 | } | ||
3751 | |||
3752 | if (c->sparse && total >= c->entries >> 2) { | ||
3753 | // convert sparse items to non-sparse! | ||
3754 | if (c->entries > (int) f->setup_temp_memory_required) | ||
3755 | f->setup_temp_memory_required = c->entries; | ||
3756 | |||
3757 | c->codeword_lengths = (uint8 *) setup_malloc(f, c->entries); | ||
3758 | if (c->codeword_lengths == NULL) return error(f, VORBIS_outofmem); | ||
3759 | memcpy(c->codeword_lengths, lengths, c->entries); | ||
3760 | setup_temp_free(f, lengths, c->entries); // note this is only safe if there have been no intervening temp mallocs! | ||
3761 | lengths = c->codeword_lengths; | ||
3762 | c->sparse = 0; | ||
3763 | } | ||
3764 | |||
3765 | // compute the size of the sorted tables | ||
3766 | if (c->sparse) { | ||
3767 | sorted_count = total; | ||
3768 | } else { | ||
3769 | sorted_count = 0; | ||
3770 | #ifndef STB_VORBIS_NO_HUFFMAN_BINARY_SEARCH | ||
3771 | for (j=0; j < c->entries; ++j) | ||
3772 | if (lengths[j] > STB_VORBIS_FAST_HUFFMAN_LENGTH && lengths[j] != NO_CODE) | ||
3773 | ++sorted_count; | ||
3774 | #endif | ||
3775 | } | ||
3776 | |||
3777 | c->sorted_entries = sorted_count; | ||
3778 | values = NULL; | ||
3779 | |||
3780 | CHECK(f); | ||
3781 | if (!c->sparse) { | ||
3782 | c->codewords = (uint32 *) setup_malloc(f, sizeof(c->codewords[0]) * c->entries); | ||
3783 | if (!c->codewords) return error(f, VORBIS_outofmem); | ||
3784 | } else { | ||
3785 | unsigned int size; | ||
3786 | if (c->sorted_entries) { | ||
3787 | c->codeword_lengths = (uint8 *) setup_malloc(f, c->sorted_entries); | ||
3788 | if (!c->codeword_lengths) return error(f, VORBIS_outofmem); | ||
3789 | c->codewords = (uint32 *) setup_temp_malloc(f, sizeof(*c->codewords) * c->sorted_entries); | ||
3790 | if (!c->codewords) return error(f, VORBIS_outofmem); | ||
3791 | values = (uint32 *) setup_temp_malloc(f, sizeof(*values) * c->sorted_entries); | ||
3792 | if (!values) return error(f, VORBIS_outofmem); | ||
3793 | } | ||
3794 | size = c->entries + (sizeof(*c->codewords) + sizeof(*values)) * c->sorted_entries; | ||
3795 | if (size > f->setup_temp_memory_required) | ||
3796 | f->setup_temp_memory_required = size; | ||
3797 | } | ||
3798 | |||
3799 | if (!compute_codewords(c, lengths, c->entries, values)) { | ||
3800 | if (c->sparse) setup_temp_free(f, values, 0); | ||
3801 | return error(f, VORBIS_invalid_setup); | ||
3802 | } | ||
3803 | |||
3804 | if (c->sorted_entries) { | ||
3805 | // allocate an extra slot for sentinels | ||
3806 | c->sorted_codewords = (uint32 *) setup_malloc(f, sizeof(*c->sorted_codewords) * (c->sorted_entries+1)); | ||
3807 | if (c->sorted_codewords == NULL) return error(f, VORBIS_outofmem); | ||
3808 | // allocate an extra slot at the front so that c->sorted_values[-1] is defined | ||
3809 | // so that we can catch that case without an extra if | ||
3810 | c->sorted_values = ( int *) setup_malloc(f, sizeof(*c->sorted_values ) * (c->sorted_entries+1)); | ||
3811 | if (c->sorted_values == NULL) return error(f, VORBIS_outofmem); | ||
3812 | ++c->sorted_values; | ||
3813 | c->sorted_values[-1] = -1; | ||
3814 | compute_sorted_huffman(c, lengths, values); | ||
3815 | } | ||
3816 | |||
3817 | if (c->sparse) { | ||
3818 | setup_temp_free(f, values, sizeof(*values)*c->sorted_entries); | ||
3819 | setup_temp_free(f, c->codewords, sizeof(*c->codewords)*c->sorted_entries); | ||
3820 | setup_temp_free(f, lengths, c->entries); | ||
3821 | c->codewords = NULL; | ||
3822 | } | ||
3823 | |||
3824 | compute_accelerated_huffman(c); | ||
3825 | |||
3826 | CHECK(f); | ||
3827 | c->lookup_type = get_bits(f, 4); | ||
3828 | if (c->lookup_type > 2) return error(f, VORBIS_invalid_setup); | ||
3829 | if (c->lookup_type > 0) { | ||
3830 | uint16 *mults; | ||
3831 | c->minimum_value = float32_unpack(get_bits(f, 32)); | ||
3832 | c->delta_value = float32_unpack(get_bits(f, 32)); | ||
3833 | c->value_bits = get_bits(f, 4)+1; | ||
3834 | c->sequence_p = get_bits(f,1); | ||
3835 | if (c->lookup_type == 1) { | ||
3836 | int values = lookup1_values(c->entries, c->dimensions); | ||
3837 | if (values < 0) return error(f, VORBIS_invalid_setup); | ||
3838 | c->lookup_values = (uint32) values; | ||
3839 | } else { | ||
3840 | c->lookup_values = c->entries * c->dimensions; | ||
3841 | } | ||
3842 | if (c->lookup_values == 0) return error(f, VORBIS_invalid_setup); | ||
3843 | mults = (uint16 *) setup_temp_malloc(f, sizeof(mults[0]) * c->lookup_values); | ||
3844 | if (mults == NULL) return error(f, VORBIS_outofmem); | ||
3845 | for (j=0; j < (int) c->lookup_values; ++j) { | ||
3846 | int q = get_bits(f, c->value_bits); | ||
3847 | if (q == EOP) { setup_temp_free(f,mults,sizeof(mults[0])*c->lookup_values); return error(f, VORBIS_invalid_setup); } | ||
3848 | mults[j] = q; | ||
3849 | } | ||
3850 | |||
3851 | #ifndef STB_VORBIS_DIVIDES_IN_CODEBOOK | ||
3852 | if (c->lookup_type == 1) { | ||
3853 | int len, sparse = c->sparse; | ||
3854 | float last=0; | ||
3855 | // pre-expand the lookup1-style multiplicands, to avoid a divide in the inner loop | ||
3856 | if (sparse) { | ||
3857 | if (c->sorted_entries == 0) goto skip; | ||
3858 | c->multiplicands = (codetype *) setup_malloc(f, sizeof(c->multiplicands[0]) * c->sorted_entries * c->dimensions); | ||
3859 | } else | ||
3860 | c->multiplicands = (codetype *) setup_malloc(f, sizeof(c->multiplicands[0]) * c->entries * c->dimensions); | ||
3861 | if (c->multiplicands == NULL) { setup_temp_free(f,mults,sizeof(mults[0])*c->lookup_values); return error(f, VORBIS_outofmem); } | ||
3862 | len = sparse ? c->sorted_entries : c->entries; | ||
3863 | for (j=0; j < len; ++j) { | ||
3864 | unsigned int z = sparse ? c->sorted_values[j] : j; | ||
3865 | unsigned int div=1; | ||
3866 | for (k=0; k < c->dimensions; ++k) { | ||
3867 | int off = (z / div) % c->lookup_values; | ||
3868 | float val = mults[off]; | ||
3869 | val = mults[off]*c->delta_value + c->minimum_value + last; | ||
3870 | c->multiplicands[j*c->dimensions + k] = val; | ||
3871 | if (c->sequence_p) | ||
3872 | last = val; | ||
3873 | if (k+1 < c->dimensions) { | ||
3874 | if (div > UINT_MAX / (unsigned int) c->lookup_values) { | ||
3875 | setup_temp_free(f, mults,sizeof(mults[0])*c->lookup_values); | ||
3876 | return error(f, VORBIS_invalid_setup); | ||
3877 | } | ||
3878 | div *= c->lookup_values; | ||
3879 | } | ||
3880 | } | ||
3881 | } | ||
3882 | c->lookup_type = 2; | ||
3883 | } | ||
3884 | else | ||
3885 | #endif | ||
3886 | { | ||
3887 | float last=0; | ||
3888 | CHECK(f); | ||
3889 | c->multiplicands = (codetype *) setup_malloc(f, sizeof(c->multiplicands[0]) * c->lookup_values); | ||
3890 | if (c->multiplicands == NULL) { setup_temp_free(f, mults,sizeof(mults[0])*c->lookup_values); return error(f, VORBIS_outofmem); } | ||
3891 | for (j=0; j < (int) c->lookup_values; ++j) { | ||
3892 | float val = mults[j] * c->delta_value + c->minimum_value + last; | ||
3893 | c->multiplicands[j] = val; | ||
3894 | if (c->sequence_p) | ||
3895 | last = val; | ||
3896 | } | ||
3897 | } | ||
3898 | #ifndef STB_VORBIS_DIVIDES_IN_CODEBOOK | ||
3899 | skip:; | ||
3900 | #endif | ||
3901 | setup_temp_free(f, mults, sizeof(mults[0])*c->lookup_values); | ||
3902 | |||
3903 | CHECK(f); | ||
3904 | } | ||
3905 | CHECK(f); | ||
3906 | } | ||
3907 | |||
3908 | // time domain transfers (notused) | ||
3909 | |||
3910 | x = get_bits(f, 6) + 1; | ||
3911 | for (i=0; i < x; ++i) { | ||
3912 | uint32 z = get_bits(f, 16); | ||
3913 | if (z != 0) return error(f, VORBIS_invalid_setup); | ||
3914 | } | ||
3915 | |||
3916 | // Floors | ||
3917 | f->floor_count = get_bits(f, 6)+1; | ||
3918 | f->floor_config = (Floor *) setup_malloc(f, f->floor_count * sizeof(*f->floor_config)); | ||
3919 | if (f->floor_config == NULL) return error(f, VORBIS_outofmem); | ||
3920 | for (i=0; i < f->floor_count; ++i) { | ||
3921 | f->floor_types[i] = get_bits(f, 16); | ||
3922 | if (f->floor_types[i] > 1) return error(f, VORBIS_invalid_setup); | ||
3923 | if (f->floor_types[i] == 0) { | ||
3924 | Floor0 *g = &f->floor_config[i].floor0; | ||
3925 | g->order = get_bits(f,8); | ||
3926 | g->rate = get_bits(f,16); | ||
3927 | g->bark_map_size = get_bits(f,16); | ||
3928 | g->amplitude_bits = get_bits(f,6); | ||
3929 | g->amplitude_offset = get_bits(f,8); | ||
3930 | g->number_of_books = get_bits(f,4) + 1; | ||
3931 | for (j=0; j < g->number_of_books; ++j) | ||
3932 | g->book_list[j] = get_bits(f,8); | ||
3933 | return error(f, VORBIS_feature_not_supported); | ||
3934 | } else { | ||
3935 | stbv__floor_ordering p[31*8+2]; | ||
3936 | Floor1 *g = &f->floor_config[i].floor1; | ||
3937 | int max_class = -1; | ||
3938 | g->partitions = get_bits(f, 5); | ||
3939 | for (j=0; j < g->partitions; ++j) { | ||
3940 | g->partition_class_list[j] = get_bits(f, 4); | ||
3941 | if (g->partition_class_list[j] > max_class) | ||
3942 | max_class = g->partition_class_list[j]; | ||
3943 | } | ||
3944 | for (j=0; j <= max_class; ++j) { | ||
3945 | g->class_dimensions[j] = get_bits(f, 3)+1; | ||
3946 | g->class_subclasses[j] = get_bits(f, 2); | ||
3947 | if (g->class_subclasses[j]) { | ||
3948 | g->class_masterbooks[j] = get_bits(f, 8); | ||
3949 | if (g->class_masterbooks[j] >= f->codebook_count) return error(f, VORBIS_invalid_setup); | ||
3950 | } | ||
3951 | for (k=0; k < 1 << g->class_subclasses[j]; ++k) { | ||
3952 | g->subclass_books[j][k] = get_bits(f,8)-1; | ||
3953 | if (g->subclass_books[j][k] >= f->codebook_count) return error(f, VORBIS_invalid_setup); | ||
3954 | } | ||
3955 | } | ||
3956 | g->floor1_multiplier = get_bits(f,2)+1; | ||
3957 | g->rangebits = get_bits(f,4); | ||
3958 | g->Xlist[0] = 0; | ||
3959 | g->Xlist[1] = 1 << g->rangebits; | ||
3960 | g->values = 2; | ||
3961 | for (j=0; j < g->partitions; ++j) { | ||
3962 | int c = g->partition_class_list[j]; | ||
3963 | for (k=0; k < g->class_dimensions[c]; ++k) { | ||
3964 | g->Xlist[g->values] = get_bits(f, g->rangebits); | ||
3965 | ++g->values; | ||
3966 | } | ||
3967 | } | ||
3968 | // precompute the sorting | ||
3969 | for (j=0; j < g->values; ++j) { | ||
3970 | p[j].x = g->Xlist[j]; | ||
3971 | p[j].id = j; | ||
3972 | } | ||
3973 | qsort(p, g->values, sizeof(p[0]), point_compare); | ||
3974 | for (j=0; j < g->values-1; ++j) | ||
3975 | if (p[j].x == p[j+1].x) | ||
3976 | return error(f, VORBIS_invalid_setup); | ||
3977 | for (j=0; j < g->values; ++j) | ||
3978 | g->sorted_order[j] = (uint8) p[j].id; | ||
3979 | // precompute the neighbors | ||
3980 | for (j=2; j < g->values; ++j) { | ||
3981 | int low = 0,hi = 0; | ||
3982 | neighbors(g->Xlist, j, &low,&hi); | ||
3983 | g->neighbors[j][0] = low; | ||
3984 | g->neighbors[j][1] = hi; | ||
3985 | } | ||
3986 | |||
3987 | if (g->values > longest_floorlist) | ||
3988 | longest_floorlist = g->values; | ||
3989 | } | ||
3990 | } | ||
3991 | |||
3992 | // Residue | ||
3993 | f->residue_count = get_bits(f, 6)+1; | ||
3994 | f->residue_config = (Residue *) setup_malloc(f, f->residue_count * sizeof(f->residue_config[0])); | ||
3995 | if (f->residue_config == NULL) return error(f, VORBIS_outofmem); | ||
3996 | memset(f->residue_config, 0, f->residue_count * sizeof(f->residue_config[0])); | ||
3997 | for (i=0; i < f->residue_count; ++i) { | ||
3998 | uint8 residue_cascade[64]; | ||
3999 | Residue *r = f->residue_config+i; | ||
4000 | f->residue_types[i] = get_bits(f, 16); | ||
4001 | if (f->residue_types[i] > 2) return error(f, VORBIS_invalid_setup); | ||
4002 | r->begin = get_bits(f, 24); | ||
4003 | r->end = get_bits(f, 24); | ||
4004 | if (r->end < r->begin) return error(f, VORBIS_invalid_setup); | ||
4005 | r->part_size = get_bits(f,24)+1; | ||
4006 | r->classifications = get_bits(f,6)+1; | ||
4007 | r->classbook = get_bits(f,8); | ||
4008 | if (r->classbook >= f->codebook_count) return error(f, VORBIS_invalid_setup); | ||
4009 | for (j=0; j < r->classifications; ++j) { | ||
4010 | uint8 high_bits=0; | ||
4011 | uint8 low_bits=get_bits(f,3); | ||
4012 | if (get_bits(f,1)) | ||
4013 | high_bits = get_bits(f,5); | ||
4014 | residue_cascade[j] = high_bits*8 + low_bits; | ||
4015 | } | ||
4016 | r->residue_books = (short (*)[8]) setup_malloc(f, sizeof(r->residue_books[0]) * r->classifications); | ||
4017 | if (r->residue_books == NULL) return error(f, VORBIS_outofmem); | ||
4018 | for (j=0; j < r->classifications; ++j) { | ||
4019 | for (k=0; k < 8; ++k) { | ||
4020 | if (residue_cascade[j] & (1 << k)) { | ||
4021 | r->residue_books[j][k] = get_bits(f, 8); | ||
4022 | if (r->residue_books[j][k] >= f->codebook_count) return error(f, VORBIS_invalid_setup); | ||
4023 | } else { | ||
4024 | r->residue_books[j][k] = -1; | ||
4025 | } | ||
4026 | } | ||
4027 | } | ||
4028 | // precompute the classifications[] array to avoid inner-loop mod/divide | ||
4029 | // call it 'classdata' since we already have r->classifications | ||
4030 | r->classdata = (uint8 **) setup_malloc(f, sizeof(*r->classdata) * f->codebooks[r->classbook].entries); | ||
4031 | if (!r->classdata) return error(f, VORBIS_outofmem); | ||
4032 | memset(r->classdata, 0, sizeof(*r->classdata) * f->codebooks[r->classbook].entries); | ||
4033 | for (j=0; j < f->codebooks[r->classbook].entries; ++j) { | ||
4034 | int classwords = f->codebooks[r->classbook].dimensions; | ||
4035 | int temp = j; | ||
4036 | r->classdata[j] = (uint8 *) setup_malloc(f, sizeof(r->classdata[j][0]) * classwords); | ||
4037 | if (r->classdata[j] == NULL) return error(f, VORBIS_outofmem); | ||
4038 | for (k=classwords-1; k >= 0; --k) { | ||
4039 | r->classdata[j][k] = temp % r->classifications; | ||
4040 | temp /= r->classifications; | ||
4041 | } | ||
4042 | } | ||
4043 | } | ||
4044 | |||
4045 | f->mapping_count = get_bits(f,6)+1; | ||
4046 | f->mapping = (Mapping *) setup_malloc(f, f->mapping_count * sizeof(*f->mapping)); | ||
4047 | if (f->mapping == NULL) return error(f, VORBIS_outofmem); | ||
4048 | memset(f->mapping, 0, f->mapping_count * sizeof(*f->mapping)); | ||
4049 | for (i=0; i < f->mapping_count; ++i) { | ||
4050 | Mapping *m = f->mapping + i; | ||
4051 | int mapping_type = get_bits(f,16); | ||
4052 | if (mapping_type != 0) return error(f, VORBIS_invalid_setup); | ||
4053 | m->chan = (MappingChannel *) setup_malloc(f, f->channels * sizeof(*m->chan)); | ||
4054 | if (m->chan == NULL) return error(f, VORBIS_outofmem); | ||
4055 | if (get_bits(f,1)) | ||
4056 | m->submaps = get_bits(f,4)+1; | ||
4057 | else | ||
4058 | m->submaps = 1; | ||
4059 | if (m->submaps > max_submaps) | ||
4060 | max_submaps = m->submaps; | ||
4061 | if (get_bits(f,1)) { | ||
4062 | m->coupling_steps = get_bits(f,8)+1; | ||
4063 | if (m->coupling_steps > f->channels) return error(f, VORBIS_invalid_setup); | ||
4064 | for (k=0; k < m->coupling_steps; ++k) { | ||
4065 | m->chan[k].magnitude = get_bits(f, ilog(f->channels-1)); | ||
4066 | m->chan[k].angle = get_bits(f, ilog(f->channels-1)); | ||
4067 | if (m->chan[k].magnitude >= f->channels) return error(f, VORBIS_invalid_setup); | ||
4068 | if (m->chan[k].angle >= f->channels) return error(f, VORBIS_invalid_setup); | ||
4069 | if (m->chan[k].magnitude == m->chan[k].angle) return error(f, VORBIS_invalid_setup); | ||
4070 | } | ||
4071 | } else | ||
4072 | m->coupling_steps = 0; | ||
4073 | |||
4074 | // reserved field | ||
4075 | if (get_bits(f,2)) return error(f, VORBIS_invalid_setup); | ||
4076 | if (m->submaps > 1) { | ||
4077 | for (j=0; j < f->channels; ++j) { | ||
4078 | m->chan[j].mux = get_bits(f, 4); | ||
4079 | if (m->chan[j].mux >= m->submaps) return error(f, VORBIS_invalid_setup); | ||
4080 | } | ||
4081 | } else | ||
4082 | // @SPECIFICATION: this case is missing from the spec | ||
4083 | for (j=0; j < f->channels; ++j) | ||
4084 | m->chan[j].mux = 0; | ||
4085 | |||
4086 | for (j=0; j < m->submaps; ++j) { | ||
4087 | get_bits(f,8); // discard | ||
4088 | m->submap_floor[j] = get_bits(f,8); | ||
4089 | m->submap_residue[j] = get_bits(f,8); | ||
4090 | if (m->submap_floor[j] >= f->floor_count) return error(f, VORBIS_invalid_setup); | ||
4091 | if (m->submap_residue[j] >= f->residue_count) return error(f, VORBIS_invalid_setup); | ||
4092 | } | ||
4093 | } | ||
4094 | |||
4095 | // Modes | ||
4096 | f->mode_count = get_bits(f, 6)+1; | ||
4097 | for (i=0; i < f->mode_count; ++i) { | ||
4098 | Mode *m = f->mode_config+i; | ||
4099 | m->blockflag = get_bits(f,1); | ||
4100 | m->windowtype = get_bits(f,16); | ||
4101 | m->transformtype = get_bits(f,16); | ||
4102 | m->mapping = get_bits(f,8); | ||
4103 | if (m->windowtype != 0) return error(f, VORBIS_invalid_setup); | ||
4104 | if (m->transformtype != 0) return error(f, VORBIS_invalid_setup); | ||
4105 | if (m->mapping >= f->mapping_count) return error(f, VORBIS_invalid_setup); | ||
4106 | } | ||
4107 | |||
4108 | flush_packet(f); | ||
4109 | |||
4110 | f->previous_length = 0; | ||
4111 | |||
4112 | for (i=0; i < f->channels; ++i) { | ||
4113 | f->channel_buffers[i] = (float *) setup_malloc(f, sizeof(float) * f->blocksize_1); | ||
4114 | f->previous_window[i] = (float *) setup_malloc(f, sizeof(float) * f->blocksize_1/2); | ||
4115 | f->finalY[i] = (int16 *) setup_malloc(f, sizeof(int16) * longest_floorlist); | ||
4116 | if (f->channel_buffers[i] == NULL || f->previous_window[i] == NULL || f->finalY[i] == NULL) return error(f, VORBIS_outofmem); | ||
4117 | memset(f->channel_buffers[i], 0, sizeof(float) * f->blocksize_1); | ||
4118 | #ifdef STB_VORBIS_NO_DEFER_FLOOR | ||
4119 | f->floor_buffers[i] = (float *) setup_malloc(f, sizeof(float) * f->blocksize_1/2); | ||
4120 | if (f->floor_buffers[i] == NULL) return error(f, VORBIS_outofmem); | ||
4121 | #endif | ||
4122 | } | ||
4123 | |||
4124 | if (!init_blocksize(f, 0, f->blocksize_0)) return FALSE; | ||
4125 | if (!init_blocksize(f, 1, f->blocksize_1)) return FALSE; | ||
4126 | f->blocksize[0] = f->blocksize_0; | ||
4127 | f->blocksize[1] = f->blocksize_1; | ||
4128 | |||
4129 | #ifdef STB_VORBIS_DIVIDE_TABLE | ||
4130 | if (integer_divide_table[1][1]==0) | ||
4131 | for (i=0; i < DIVTAB_NUMER; ++i) | ||
4132 | for (j=1; j < DIVTAB_DENOM; ++j) | ||
4133 | integer_divide_table[i][j] = i / j; | ||
4134 | #endif | ||
4135 | |||
4136 | // compute how much temporary memory is needed | ||
4137 | |||
4138 | // 1. | ||
4139 | { | ||
4140 | uint32 imdct_mem = (f->blocksize_1 * sizeof(float) >> 1); | ||
4141 | uint32 classify_mem; | ||
4142 | int i,max_part_read=0; | ||
4143 | for (i=0; i < f->residue_count; ++i) { | ||
4144 | Residue *r = f->residue_config + i; | ||
4145 | unsigned int actual_size = f->blocksize_1 / 2; | ||
4146 | unsigned int limit_r_begin = r->begin < actual_size ? r->begin : actual_size; | ||
4147 | unsigned int limit_r_end = r->end < actual_size ? r->end : actual_size; | ||
4148 | int n_read = limit_r_end - limit_r_begin; | ||
4149 | int part_read = n_read / r->part_size; | ||
4150 | if (part_read > max_part_read) | ||
4151 | max_part_read = part_read; | ||
4152 | } | ||
4153 | #ifndef STB_VORBIS_DIVIDES_IN_RESIDUE | ||
4154 | classify_mem = f->channels * (sizeof(void*) + max_part_read * sizeof(uint8 *)); | ||
4155 | #else | ||
4156 | classify_mem = f->channels * (sizeof(void*) + max_part_read * sizeof(int *)); | ||
4157 | #endif | ||
4158 | |||
4159 | // maximum reasonable partition size is f->blocksize_1 | ||
4160 | |||
4161 | f->temp_memory_required = classify_mem; | ||
4162 | if (imdct_mem > f->temp_memory_required) | ||
4163 | f->temp_memory_required = imdct_mem; | ||
4164 | } | ||
4165 | |||
4166 | |||
4167 | if (f->alloc.alloc_buffer) { | ||
4168 | assert(f->temp_offset == f->alloc.alloc_buffer_length_in_bytes); | ||
4169 | // check if there's enough temp memory so we don't error later | ||
4170 | if (f->setup_offset + sizeof(*f) + f->temp_memory_required > (unsigned) f->temp_offset) | ||
4171 | return error(f, VORBIS_outofmem); | ||
4172 | } | ||
4173 | |||
4174 | // @TODO: stb_vorbis_seek_start expects first_audio_page_offset to point to a page | ||
4175 | // without PAGEFLAG_continued_packet, so this either points to the first page, or | ||
4176 | // the page after the end of the headers. It might be cleaner to point to a page | ||
4177 | // in the middle of the headers, when that's the page where the first audio packet | ||
4178 | // starts, but we'd have to also correctly skip the end of any continued packet in | ||
4179 | // stb_vorbis_seek_start. | ||
4180 | if (f->next_seg == -1) { | ||
4181 | f->first_audio_page_offset = stb_vorbis_get_file_offset(f); | ||
4182 | } else { | ||
4183 | f->first_audio_page_offset = 0; | ||
4184 | } | ||
4185 | |||
4186 | return TRUE; | ||
4187 | } | ||
4188 | |||
4189 | static void vorbis_deinit(stb_vorbis *p) | ||
4190 | { | ||
4191 | int i,j; | ||
4192 | |||
4193 | setup_free(p, p->vendor); | ||
4194 | for (i=0; i < p->comment_list_length; ++i) { | ||
4195 | setup_free(p, p->comment_list[i]); | ||
4196 | } | ||
4197 | setup_free(p, p->comment_list); | ||
4198 | |||
4199 | if (p->residue_config) { | ||
4200 | for (i=0; i < p->residue_count; ++i) { | ||
4201 | Residue *r = p->residue_config+i; | ||
4202 | if (r->classdata) { | ||
4203 | for (j=0; j < p->codebooks[r->classbook].entries; ++j) | ||
4204 | setup_free(p, r->classdata[j]); | ||
4205 | setup_free(p, r->classdata); | ||
4206 | } | ||
4207 | setup_free(p, r->residue_books); | ||
4208 | } | ||
4209 | } | ||
4210 | |||
4211 | if (p->codebooks) { | ||
4212 | CHECK(p); | ||
4213 | for (i=0; i < p->codebook_count; ++i) { | ||
4214 | Codebook *c = p->codebooks + i; | ||
4215 | setup_free(p, c->codeword_lengths); | ||
4216 | setup_free(p, c->multiplicands); | ||
4217 | setup_free(p, c->codewords); | ||
4218 | setup_free(p, c->sorted_codewords); | ||
4219 | // c->sorted_values[-1] is the first entry in the array | ||
4220 | setup_free(p, c->sorted_values ? c->sorted_values-1 : NULL); | ||
4221 | } | ||
4222 | setup_free(p, p->codebooks); | ||
4223 | } | ||
4224 | setup_free(p, p->floor_config); | ||
4225 | setup_free(p, p->residue_config); | ||
4226 | if (p->mapping) { | ||
4227 | for (i=0; i < p->mapping_count; ++i) | ||
4228 | setup_free(p, p->mapping[i].chan); | ||
4229 | setup_free(p, p->mapping); | ||
4230 | } | ||
4231 | CHECK(p); | ||
4232 | for (i=0; i < p->channels && i < STB_VORBIS_MAX_CHANNELS; ++i) { | ||
4233 | setup_free(p, p->channel_buffers[i]); | ||
4234 | setup_free(p, p->previous_window[i]); | ||
4235 | #ifdef STB_VORBIS_NO_DEFER_FLOOR | ||
4236 | setup_free(p, p->floor_buffers[i]); | ||
4237 | #endif | ||
4238 | setup_free(p, p->finalY[i]); | ||
4239 | } | ||
4240 | for (i=0; i < 2; ++i) { | ||
4241 | setup_free(p, p->A[i]); | ||
4242 | setup_free(p, p->B[i]); | ||
4243 | setup_free(p, p->C[i]); | ||
4244 | setup_free(p, p->window[i]); | ||
4245 | setup_free(p, p->bit_reverse[i]); | ||
4246 | } | ||
4247 | #ifndef STB_VORBIS_NO_STDIO | ||
4248 | if (p->close_on_free) fclose(p->f); | ||
4249 | #endif | ||
4250 | } | ||
4251 | |||
4252 | void stb_vorbis_close(stb_vorbis *p) | ||
4253 | { | ||
4254 | if (p == NULL) return; | ||
4255 | vorbis_deinit(p); | ||
4256 | setup_free(p,p); | ||
4257 | } | ||
4258 | |||
4259 | static void vorbis_init(stb_vorbis *p, const stb_vorbis_alloc *z) | ||
4260 | { | ||
4261 | memset(p, 0, sizeof(*p)); // NULL out all malloc'd pointers to start | ||
4262 | if (z) { | ||
4263 | p->alloc = *z; | ||
4264 | p->alloc.alloc_buffer_length_in_bytes &= ~7; | ||
4265 | p->temp_offset = p->alloc.alloc_buffer_length_in_bytes; | ||
4266 | } | ||
4267 | p->eof = 0; | ||
4268 | p->error = VORBIS__no_error; | ||
4269 | p->stream = NULL; | ||
4270 | p->codebooks = NULL; | ||
4271 | p->page_crc_tests = -1; | ||
4272 | #ifndef STB_VORBIS_NO_STDIO | ||
4273 | p->close_on_free = FALSE; | ||
4274 | p->f = NULL; | ||
4275 | #endif | ||
4276 | } | ||
4277 | |||
4278 | int stb_vorbis_get_sample_offset(stb_vorbis *f) | ||
4279 | { | ||
4280 | if (f->current_loc_valid) | ||
4281 | return f->current_loc; | ||
4282 | else | ||
4283 | return -1; | ||
4284 | } | ||
4285 | |||
4286 | stb_vorbis_info stb_vorbis_get_info(stb_vorbis *f) | ||
4287 | { | ||
4288 | stb_vorbis_info d; | ||
4289 | d.channels = f->channels; | ||
4290 | d.sample_rate = f->sample_rate; | ||
4291 | d.setup_memory_required = f->setup_memory_required; | ||
4292 | d.setup_temp_memory_required = f->setup_temp_memory_required; | ||
4293 | d.temp_memory_required = f->temp_memory_required; | ||
4294 | d.max_frame_size = f->blocksize_1 >> 1; | ||
4295 | return d; | ||
4296 | } | ||
4297 | |||
4298 | stb_vorbis_comment stb_vorbis_get_comment(stb_vorbis *f) | ||
4299 | { | ||
4300 | stb_vorbis_comment d; | ||
4301 | d.vendor = f->vendor; | ||
4302 | d.comment_list_length = f->comment_list_length; | ||
4303 | d.comment_list = f->comment_list; | ||
4304 | return d; | ||
4305 | } | ||
4306 | |||
4307 | int stb_vorbis_get_error(stb_vorbis *f) | ||
4308 | { | ||
4309 | int e = f->error; | ||
4310 | f->error = VORBIS__no_error; | ||
4311 | return e; | ||
4312 | } | ||
4313 | |||
4314 | static stb_vorbis * vorbis_alloc(stb_vorbis *f) | ||
4315 | { | ||
4316 | stb_vorbis *p = (stb_vorbis *) setup_malloc(f, sizeof(*p)); | ||
4317 | return p; | ||
4318 | } | ||
4319 | |||
4320 | #ifndef STB_VORBIS_NO_PUSHDATA_API | ||
4321 | |||
4322 | void stb_vorbis_flush_pushdata(stb_vorbis *f) | ||
4323 | { | ||
4324 | f->previous_length = 0; | ||
4325 | f->page_crc_tests = 0; | ||
4326 | f->discard_samples_deferred = 0; | ||
4327 | f->current_loc_valid = FALSE; | ||
4328 | f->first_decode = FALSE; | ||
4329 | f->samples_output = 0; | ||
4330 | f->channel_buffer_start = 0; | ||
4331 | f->channel_buffer_end = 0; | ||
4332 | } | ||
4333 | |||
4334 | static int vorbis_search_for_page_pushdata(vorb *f, uint8 *data, int data_len) | ||
4335 | { | ||
4336 | int i,n; | ||
4337 | for (i=0; i < f->page_crc_tests; ++i) | ||
4338 | f->scan[i].bytes_done = 0; | ||
4339 | |||
4340 | // if we have room for more scans, search for them first, because | ||
4341 | // they may cause us to stop early if their header is incomplete | ||
4342 | if (f->page_crc_tests < STB_VORBIS_PUSHDATA_CRC_COUNT) { | ||
4343 | if (data_len < 4) return 0; | ||
4344 | data_len -= 3; // need to look for 4-byte sequence, so don't miss | ||
4345 | // one that straddles a boundary | ||
4346 | for (i=0; i < data_len; ++i) { | ||
4347 | if (data[i] == 0x4f) { | ||
4348 | if (0==memcmp(data+i, ogg_page_header, 4)) { | ||
4349 | int j,len; | ||
4350 | uint32 crc; | ||
4351 | // make sure we have the whole page header | ||
4352 | if (i+26 >= data_len || i+27+data[i+26] >= data_len) { | ||
4353 | // only read up to this page start, so hopefully we'll | ||
4354 | // have the whole page header start next time | ||
4355 | data_len = i; | ||
4356 | break; | ||
4357 | } | ||
4358 | // ok, we have it all; compute the length of the page | ||
4359 | len = 27 + data[i+26]; | ||
4360 | for (j=0; j < data[i+26]; ++j) | ||
4361 | len += data[i+27+j]; | ||
4362 | // scan everything up to the embedded crc (which we must 0) | ||
4363 | crc = 0; | ||
4364 | for (j=0; j < 22; ++j) | ||
4365 | crc = crc32_update(crc, data[i+j]); | ||
4366 | // now process 4 0-bytes | ||
4367 | for ( ; j < 26; ++j) | ||
4368 | crc = crc32_update(crc, 0); | ||
4369 | // len is the total number of bytes we need to scan | ||
4370 | n = f->page_crc_tests++; | ||
4371 | f->scan[n].bytes_left = len-j; | ||
4372 | f->scan[n].crc_so_far = crc; | ||
4373 | f->scan[n].goal_crc = data[i+22] + (data[i+23] << 8) + (data[i+24]<<16) + (data[i+25]<<24); | ||
4374 | // if the last frame on a page is continued to the next, then | ||
4375 | // we can't recover the sample_loc immediately | ||
4376 | if (data[i+27+data[i+26]-1] == 255) | ||
4377 | f->scan[n].sample_loc = ~0; | ||
4378 | else | ||
4379 | f->scan[n].sample_loc = data[i+6] + (data[i+7] << 8) + (data[i+ 8]<<16) + (data[i+ 9]<<24); | ||
4380 | f->scan[n].bytes_done = i+j; | ||
4381 | if (f->page_crc_tests == STB_VORBIS_PUSHDATA_CRC_COUNT) | ||
4382 | break; | ||
4383 | // keep going if we still have room for more | ||
4384 | } | ||
4385 | } | ||
4386 | } | ||
4387 | } | ||
4388 | |||
4389 | for (i=0; i < f->page_crc_tests;) { | ||
4390 | uint32 crc; | ||
4391 | int j; | ||
4392 | int n = f->scan[i].bytes_done; | ||
4393 | int m = f->scan[i].bytes_left; | ||
4394 | if (m > data_len - n) m = data_len - n; | ||
4395 | // m is the bytes to scan in the current chunk | ||
4396 | crc = f->scan[i].crc_so_far; | ||
4397 | for (j=0; j < m; ++j) | ||
4398 | crc = crc32_update(crc, data[n+j]); | ||
4399 | f->scan[i].bytes_left -= m; | ||
4400 | f->scan[i].crc_so_far = crc; | ||
4401 | if (f->scan[i].bytes_left == 0) { | ||
4402 | // does it match? | ||
4403 | if (f->scan[i].crc_so_far == f->scan[i].goal_crc) { | ||
4404 | // Houston, we have page | ||
4405 | data_len = n+m; // consumption amount is wherever that scan ended | ||
4406 | f->page_crc_tests = -1; // drop out of page scan mode | ||
4407 | f->previous_length = 0; // decode-but-don't-output one frame | ||
4408 | f->next_seg = -1; // start a new page | ||
4409 | f->current_loc = f->scan[i].sample_loc; // set the current sample location | ||
4410 | // to the amount we'd have decoded had we decoded this page | ||
4411 | f->current_loc_valid = f->current_loc != ~0U; | ||
4412 | return data_len; | ||
4413 | } | ||
4414 | // delete entry | ||
4415 | f->scan[i] = f->scan[--f->page_crc_tests]; | ||
4416 | } else { | ||
4417 | ++i; | ||
4418 | } | ||
4419 | } | ||
4420 | |||
4421 | return data_len; | ||
4422 | } | ||
4423 | |||
4424 | // return value: number of bytes we used | ||
4425 | int stb_vorbis_decode_frame_pushdata( | ||
4426 | stb_vorbis *f, // the file we're decoding | ||
4427 | const uint8 *data, int data_len, // the memory available for decoding | ||
4428 | int *channels, // place to write number of float * buffers | ||
4429 | float ***output, // place to write float ** array of float * buffers | ||
4430 | int *samples // place to write number of output samples | ||
4431 | ) | ||
4432 | { | ||
4433 | int i; | ||
4434 | int len,right,left; | ||
4435 | |||
4436 | if (!IS_PUSH_MODE(f)) return error(f, VORBIS_invalid_api_mixing); | ||
4437 | |||
4438 | if (f->page_crc_tests >= 0) { | ||
4439 | *samples = 0; | ||
4440 | return vorbis_search_for_page_pushdata(f, (uint8 *) data, data_len); | ||
4441 | } | ||
4442 | |||
4443 | f->stream = (uint8 *) data; | ||
4444 | f->stream_end = (uint8 *) data + data_len; | ||
4445 | f->error = VORBIS__no_error; | ||
4446 | |||
4447 | // check that we have the entire packet in memory | ||
4448 | if (!is_whole_packet_present(f)) { | ||
4449 | *samples = 0; | ||
4450 | return 0; | ||
4451 | } | ||
4452 | |||
4453 | if (!vorbis_decode_packet(f, &len, &left, &right)) { | ||
4454 | // save the actual error we encountered | ||
4455 | enum STBVorbisError error = f->error; | ||
4456 | if (error == VORBIS_bad_packet_type) { | ||
4457 | // flush and resynch | ||
4458 | f->error = VORBIS__no_error; | ||
4459 | while (get8_packet(f) != EOP) | ||
4460 | if (f->eof) break; | ||
4461 | *samples = 0; | ||
4462 | return (int) (f->stream - data); | ||
4463 | } | ||
4464 | if (error == VORBIS_continued_packet_flag_invalid) { | ||
4465 | if (f->previous_length == 0) { | ||
4466 | // we may be resynching, in which case it's ok to hit one | ||
4467 | // of these; just discard the packet | ||
4468 | f->error = VORBIS__no_error; | ||
4469 | while (get8_packet(f) != EOP) | ||
4470 | if (f->eof) break; | ||
4471 | *samples = 0; | ||
4472 | return (int) (f->stream - data); | ||
4473 | } | ||
4474 | } | ||
4475 | // if we get an error while parsing, what to do? | ||
4476 | // well, it DEFINITELY won't work to continue from where we are! | ||
4477 | stb_vorbis_flush_pushdata(f); | ||
4478 | // restore the error that actually made us bail | ||
4479 | f->error = error; | ||
4480 | *samples = 0; | ||
4481 | return 1; | ||
4482 | } | ||
4483 | |||
4484 | // success! | ||
4485 | len = vorbis_finish_frame(f, len, left, right); | ||
4486 | for (i=0; i < f->channels; ++i) | ||
4487 | f->outputs[i] = f->channel_buffers[i] + left; | ||
4488 | |||
4489 | if (channels) *channels = f->channels; | ||
4490 | *samples = len; | ||
4491 | *output = f->outputs; | ||
4492 | return (int) (f->stream - data); | ||
4493 | } | ||
4494 | |||
4495 | stb_vorbis *stb_vorbis_open_pushdata( | ||
4496 | const unsigned char *data, int data_len, // the memory available for decoding | ||
4497 | int *data_used, // only defined if result is not NULL | ||
4498 | int *error, const stb_vorbis_alloc *alloc) | ||
4499 | { | ||
4500 | stb_vorbis *f, p; | ||
4501 | vorbis_init(&p, alloc); | ||
4502 | p.stream = (uint8 *) data; | ||
4503 | p.stream_end = (uint8 *) data + data_len; | ||
4504 | p.push_mode = TRUE; | ||
4505 | if (!start_decoder(&p)) { | ||
4506 | if (p.eof) | ||
4507 | *error = VORBIS_need_more_data; | ||
4508 | else | ||
4509 | *error = p.error; | ||
4510 | return NULL; | ||
4511 | } | ||
4512 | f = vorbis_alloc(&p); | ||
4513 | if (f) { | ||
4514 | *f = p; | ||
4515 | *data_used = (int) (f->stream - data); | ||
4516 | *error = 0; | ||
4517 | return f; | ||
4518 | } else { | ||
4519 | vorbis_deinit(&p); | ||
4520 | return NULL; | ||
4521 | } | ||
4522 | } | ||
4523 | #endif // STB_VORBIS_NO_PUSHDATA_API | ||
4524 | |||
4525 | unsigned int stb_vorbis_get_file_offset(stb_vorbis *f) | ||
4526 | { | ||
4527 | #ifndef STB_VORBIS_NO_PUSHDATA_API | ||
4528 | if (f->push_mode) return 0; | ||
4529 | #endif | ||
4530 | if (USE_MEMORY(f)) return (unsigned int) (f->stream - f->stream_start); | ||
4531 | #ifndef STB_VORBIS_NO_STDIO | ||
4532 | return (unsigned int) (ftell(f->f) - f->f_start); | ||
4533 | #endif | ||
4534 | } | ||
4535 | |||
4536 | #ifndef STB_VORBIS_NO_PULLDATA_API | ||
4537 | // | ||
4538 | // DATA-PULLING API | ||
4539 | // | ||
4540 | |||
4541 | static uint32 vorbis_find_page(stb_vorbis *f, uint32 *end, uint32 *last) | ||
4542 | { | ||
4543 | for(;;) { | ||
4544 | int n; | ||
4545 | if (f->eof) return 0; | ||
4546 | n = get8(f); | ||
4547 | if (n == 0x4f) { // page header candidate | ||
4548 | unsigned int retry_loc = stb_vorbis_get_file_offset(f); | ||
4549 | int i; | ||
4550 | // check if we're off the end of a file_section stream | ||
4551 | if (retry_loc - 25 > f->stream_len) | ||
4552 | return 0; | ||
4553 | // check the rest of the header | ||
4554 | for (i=1; i < 4; ++i) | ||
4555 | if (get8(f) != ogg_page_header[i]) | ||
4556 | break; | ||
4557 | if (f->eof) return 0; | ||
4558 | if (i == 4) { | ||
4559 | uint8 header[27]; | ||
4560 | uint32 i, crc, goal, len; | ||
4561 | for (i=0; i < 4; ++i) | ||
4562 | header[i] = ogg_page_header[i]; | ||
4563 | for (; i < 27; ++i) | ||
4564 | header[i] = get8(f); | ||
4565 | if (f->eof) return 0; | ||
4566 | if (header[4] != 0) goto invalid; | ||
4567 | goal = header[22] + (header[23] << 8) + (header[24]<<16) + (header[25]<<24); | ||
4568 | for (i=22; i < 26; ++i) | ||
4569 | header[i] = 0; | ||
4570 | crc = 0; | ||
4571 | for (i=0; i < 27; ++i) | ||
4572 | crc = crc32_update(crc, header[i]); | ||
4573 | len = 0; | ||
4574 | for (i=0; i < header[26]; ++i) { | ||
4575 | int s = get8(f); | ||
4576 | crc = crc32_update(crc, s); | ||
4577 | len += s; | ||
4578 | } | ||
4579 | if (len && f->eof) return 0; | ||
4580 | for (i=0; i < len; ++i) | ||
4581 | crc = crc32_update(crc, get8(f)); | ||
4582 | // finished parsing probable page | ||
4583 | if (crc == goal) { | ||
4584 | // we could now check that it's either got the last | ||
4585 | // page flag set, OR it's followed by the capture | ||
4586 | // pattern, but I guess TECHNICALLY you could have | ||
4587 | // a file with garbage between each ogg page and recover | ||
4588 | // from it automatically? So even though that paranoia | ||
4589 | // might decrease the chance of an invalid decode by | ||
4590 | // another 2^32, not worth it since it would hose those | ||
4591 | // invalid-but-useful files? | ||
4592 | if (end) | ||
4593 | *end = stb_vorbis_get_file_offset(f); | ||
4594 | if (last) { | ||
4595 | if (header[5] & 0x04) | ||
4596 | *last = 1; | ||
4597 | else | ||
4598 | *last = 0; | ||
4599 | } | ||
4600 | set_file_offset(f, retry_loc-1); | ||
4601 | return 1; | ||
4602 | } | ||
4603 | } | ||
4604 | invalid: | ||
4605 | // not a valid page, so rewind and look for next one | ||
4606 | set_file_offset(f, retry_loc); | ||
4607 | } | ||
4608 | } | ||
4609 | } | ||
4610 | |||
4611 | |||
4612 | #define SAMPLE_unknown 0xffffffff | ||
4613 | |||
4614 | // seeking is implemented with a binary search, which narrows down the range to | ||
4615 | // 64K, before using a linear search (because finding the synchronization | ||
4616 | // pattern can be expensive, and the chance we'd find the end page again is | ||
4617 | // relatively high for small ranges) | ||
4618 | // | ||
4619 | // two initial interpolation-style probes are used at the start of the search | ||
4620 | // to try to bound either side of the binary search sensibly, while still | ||
4621 | // working in O(log n) time if they fail. | ||
4622 | |||
4623 | static int get_seek_page_info(stb_vorbis *f, ProbedPage *z) | ||
4624 | { | ||
4625 | uint8 header[27], lacing[255]; | ||
4626 | int i,len; | ||
4627 | |||
4628 | // record where the page starts | ||
4629 | z->page_start = stb_vorbis_get_file_offset(f); | ||
4630 | |||
4631 | // parse the header | ||
4632 | getn(f, header, 27); | ||
4633 | if (header[0] != 'O' || header[1] != 'g' || header[2] != 'g' || header[3] != 'S') | ||
4634 | return 0; | ||
4635 | getn(f, lacing, header[26]); | ||
4636 | |||
4637 | // determine the length of the payload | ||
4638 | len = 0; | ||
4639 | for (i=0; i < header[26]; ++i) | ||
4640 | len += lacing[i]; | ||
4641 | |||
4642 | // this implies where the page ends | ||
4643 | z->page_end = z->page_start + 27 + header[26] + len; | ||
4644 | |||
4645 | // read the last-decoded sample out of the data | ||
4646 | z->last_decoded_sample = header[6] + (header[7] << 8) + (header[8] << 16) + (header[9] << 24); | ||
4647 | |||
4648 | // restore file state to where we were | ||
4649 | set_file_offset(f, z->page_start); | ||
4650 | return 1; | ||
4651 | } | ||
4652 | |||
4653 | // rarely used function to seek back to the preceding page while finding the | ||
4654 | // start of a packet | ||
4655 | static int go_to_page_before(stb_vorbis *f, unsigned int limit_offset) | ||
4656 | { | ||
4657 | unsigned int previous_safe, end; | ||
4658 | |||
4659 | // now we want to seek back 64K from the limit | ||
4660 | if (limit_offset >= 65536 && limit_offset-65536 >= f->first_audio_page_offset) | ||
4661 | previous_safe = limit_offset - 65536; | ||
4662 | else | ||
4663 | previous_safe = f->first_audio_page_offset; | ||
4664 | |||
4665 | set_file_offset(f, previous_safe); | ||
4666 | |||
4667 | while (vorbis_find_page(f, &end, NULL)) { | ||
4668 | if (end >= limit_offset && stb_vorbis_get_file_offset(f) < limit_offset) | ||
4669 | return 1; | ||
4670 | set_file_offset(f, end); | ||
4671 | } | ||
4672 | |||
4673 | return 0; | ||
4674 | } | ||
4675 | |||
4676 | // implements the search logic for finding a page and starting decoding. if | ||
4677 | // the function succeeds, current_loc_valid will be true and current_loc will | ||
4678 | // be less than or equal to the provided sample number (the closer the | ||
4679 | // better). | ||
4680 | static int seek_to_sample_coarse(stb_vorbis *f, uint32 sample_number) | ||
4681 | { | ||
4682 | ProbedPage left, right, mid; | ||
4683 | int i, start_seg_with_known_loc, end_pos, page_start; | ||
4684 | uint32 delta, stream_length, padding, last_sample_limit; | ||
4685 | double offset = 0.0, bytes_per_sample = 0.0; | ||
4686 | int probe = 0; | ||
4687 | |||
4688 | // find the last page and validate the target sample | ||
4689 | stream_length = stb_vorbis_stream_length_in_samples(f); | ||
4690 | if (stream_length == 0) return error(f, VORBIS_seek_without_length); | ||
4691 | if (sample_number > stream_length) return error(f, VORBIS_seek_invalid); | ||
4692 | |||
4693 | // this is the maximum difference between the window-center (which is the | ||
4694 | // actual granule position value), and the right-start (which the spec | ||
4695 | // indicates should be the granule position (give or take one)). | ||
4696 | padding = ((f->blocksize_1 - f->blocksize_0) >> 2); | ||
4697 | if (sample_number < padding) | ||
4698 | last_sample_limit = 0; | ||
4699 | else | ||
4700 | last_sample_limit = sample_number - padding; | ||
4701 | |||
4702 | left = f->p_first; | ||
4703 | while (left.last_decoded_sample == ~0U) { | ||
4704 | // (untested) the first page does not have a 'last_decoded_sample' | ||
4705 | set_file_offset(f, left.page_end); | ||
4706 | if (!get_seek_page_info(f, &left)) goto error; | ||
4707 | } | ||
4708 | |||
4709 | right = f->p_last; | ||
4710 | assert(right.last_decoded_sample != ~0U); | ||
4711 | |||
4712 | // starting from the start is handled differently | ||
4713 | if (last_sample_limit <= left.last_decoded_sample) { | ||
4714 | if (stb_vorbis_seek_start(f)) { | ||
4715 | if (f->current_loc > sample_number) | ||
4716 | return error(f, VORBIS_seek_failed); | ||
4717 | return 1; | ||
4718 | } | ||
4719 | return 0; | ||
4720 | } | ||
4721 | |||
4722 | while (left.page_end != right.page_start) { | ||
4723 | assert(left.page_end < right.page_start); | ||
4724 | // search range in bytes | ||
4725 | delta = right.page_start - left.page_end; | ||
4726 | if (delta <= 65536) { | ||
4727 | // there's only 64K left to search - handle it linearly | ||
4728 | set_file_offset(f, left.page_end); | ||
4729 | } else { | ||
4730 | if (probe < 2) { | ||
4731 | if (probe == 0) { | ||
4732 | // first probe (interpolate) | ||
4733 | double data_bytes = right.page_end - left.page_start; | ||
4734 | bytes_per_sample = data_bytes / right.last_decoded_sample; | ||
4735 | offset = left.page_start + bytes_per_sample * (last_sample_limit - left.last_decoded_sample); | ||
4736 | } else { | ||
4737 | // second probe (try to bound the other side) | ||
4738 | double error = ((double) last_sample_limit - mid.last_decoded_sample) * bytes_per_sample; | ||
4739 | if (error >= 0 && error < 8000) error = 8000; | ||
4740 | if (error < 0 && error > -8000) error = -8000; | ||
4741 | offset += error * 2; | ||
4742 | } | ||
4743 | |||
4744 | // ensure the offset is valid | ||
4745 | if (offset < left.page_end) | ||
4746 | offset = left.page_end; | ||
4747 | if (offset > right.page_start - 65536) | ||
4748 | offset = right.page_start - 65536; | ||
4749 | |||
4750 | set_file_offset(f, (unsigned int) offset); | ||
4751 | } else { | ||
4752 | // binary search for large ranges (offset by 32K to ensure | ||
4753 | // we don't hit the right page) | ||
4754 | set_file_offset(f, left.page_end + (delta / 2) - 32768); | ||
4755 | } | ||
4756 | |||
4757 | if (!vorbis_find_page(f, NULL, NULL)) goto error; | ||
4758 | } | ||
4759 | |||
4760 | for (;;) { | ||
4761 | if (!get_seek_page_info(f, &mid)) goto error; | ||
4762 | if (mid.last_decoded_sample != ~0U) break; | ||
4763 | // (untested) no frames end on this page | ||
4764 | set_file_offset(f, mid.page_end); | ||
4765 | assert(mid.page_start < right.page_start); | ||
4766 | } | ||
4767 | |||
4768 | // if we've just found the last page again then we're in a tricky file, | ||
4769 | // and we're close enough (if it wasn't an interpolation probe). | ||
4770 | if (mid.page_start == right.page_start) { | ||
4771 | if (probe >= 2 || delta <= 65536) | ||
4772 | break; | ||
4773 | } else { | ||
4774 | if (last_sample_limit < mid.last_decoded_sample) | ||
4775 | right = mid; | ||
4776 | else | ||
4777 | left = mid; | ||
4778 | } | ||
4779 | |||
4780 | ++probe; | ||
4781 | } | ||
4782 | |||
4783 | // seek back to start of the last packet | ||
4784 | page_start = left.page_start; | ||
4785 | set_file_offset(f, page_start); | ||
4786 | if (!start_page(f)) return error(f, VORBIS_seek_failed); | ||
4787 | end_pos = f->end_seg_with_known_loc; | ||
4788 | assert(end_pos >= 0); | ||
4789 | |||
4790 | for (;;) { | ||
4791 | for (i = end_pos; i > 0; --i) | ||
4792 | if (f->segments[i-1] != 255) | ||
4793 | break; | ||
4794 | |||
4795 | start_seg_with_known_loc = i; | ||
4796 | |||
4797 | if (start_seg_with_known_loc > 0 || !(f->page_flag & PAGEFLAG_continued_packet)) | ||
4798 | break; | ||
4799 | |||
4800 | // (untested) the final packet begins on an earlier page | ||
4801 | if (!go_to_page_before(f, page_start)) | ||
4802 | goto error; | ||
4803 | |||
4804 | page_start = stb_vorbis_get_file_offset(f); | ||
4805 | if (!start_page(f)) goto error; | ||
4806 | end_pos = f->segment_count - 1; | ||
4807 | } | ||
4808 | |||
4809 | // prepare to start decoding | ||
4810 | f->current_loc_valid = FALSE; | ||
4811 | f->last_seg = FALSE; | ||
4812 | f->valid_bits = 0; | ||
4813 | f->packet_bytes = 0; | ||
4814 | f->bytes_in_seg = 0; | ||
4815 | f->previous_length = 0; | ||
4816 | f->next_seg = start_seg_with_known_loc; | ||
4817 | |||
4818 | for (i = 0; i < start_seg_with_known_loc; i++) | ||
4819 | skip(f, f->segments[i]); | ||
4820 | |||
4821 | // start decoding (optimizable - this frame is generally discarded) | ||
4822 | if (!vorbis_pump_first_frame(f)) | ||
4823 | return 0; | ||
4824 | if (f->current_loc > sample_number) | ||
4825 | return error(f, VORBIS_seek_failed); | ||
4826 | return 1; | ||
4827 | |||
4828 | error: | ||
4829 | // try to restore the file to a valid state | ||
4830 | stb_vorbis_seek_start(f); | ||
4831 | return error(f, VORBIS_seek_failed); | ||
4832 | } | ||
4833 | |||
4834 | // the same as vorbis_decode_initial, but without advancing | ||
4835 | static int peek_decode_initial(vorb *f, int *p_left_start, int *p_left_end, int *p_right_start, int *p_right_end, int *mode) | ||
4836 | { | ||
4837 | int bits_read, bytes_read; | ||
4838 | |||
4839 | if (!vorbis_decode_initial(f, p_left_start, p_left_end, p_right_start, p_right_end, mode)) | ||
4840 | return 0; | ||
4841 | |||
4842 | // either 1 or 2 bytes were read, figure out which so we can rewind | ||
4843 | bits_read = 1 + ilog(f->mode_count-1); | ||
4844 | if (f->mode_config[*mode].blockflag) | ||
4845 | bits_read += 2; | ||
4846 | bytes_read = (bits_read + 7) / 8; | ||
4847 | |||
4848 | f->bytes_in_seg += bytes_read; | ||
4849 | f->packet_bytes -= bytes_read; | ||
4850 | skip(f, -bytes_read); | ||
4851 | if (f->next_seg == -1) | ||
4852 | f->next_seg = f->segment_count - 1; | ||
4853 | else | ||
4854 | f->next_seg--; | ||
4855 | f->valid_bits = 0; | ||
4856 | |||
4857 | return 1; | ||
4858 | } | ||
4859 | |||
4860 | int stb_vorbis_seek_frame(stb_vorbis *f, unsigned int sample_number) | ||
4861 | { | ||
4862 | uint32 max_frame_samples; | ||
4863 | |||
4864 | if (IS_PUSH_MODE(f)) return error(f, VORBIS_invalid_api_mixing); | ||
4865 | |||
4866 | // fast page-level search | ||
4867 | if (!seek_to_sample_coarse(f, sample_number)) | ||
4868 | return 0; | ||
4869 | |||
4870 | assert(f->current_loc_valid); | ||
4871 | assert(f->current_loc <= sample_number); | ||
4872 | |||
4873 | // linear search for the relevant packet | ||
4874 | max_frame_samples = (f->blocksize_1*3 - f->blocksize_0) >> 2; | ||
4875 | while (f->current_loc < sample_number) { | ||
4876 | int left_start, left_end, right_start, right_end, mode, frame_samples; | ||
4877 | if (!peek_decode_initial(f, &left_start, &left_end, &right_start, &right_end, &mode)) | ||
4878 | return error(f, VORBIS_seek_failed); | ||
4879 | // calculate the number of samples returned by the next frame | ||
4880 | frame_samples = right_start - left_start; | ||
4881 | if (f->current_loc + frame_samples > sample_number) { | ||
4882 | return 1; // the next frame will contain the sample | ||
4883 | } else if (f->current_loc + frame_samples + max_frame_samples > sample_number) { | ||
4884 | // there's a chance the frame after this could contain the sample | ||
4885 | vorbis_pump_first_frame(f); | ||
4886 | } else { | ||
4887 | // this frame is too early to be relevant | ||
4888 | f->current_loc += frame_samples; | ||
4889 | f->previous_length = 0; | ||
4890 | maybe_start_packet(f); | ||
4891 | flush_packet(f); | ||
4892 | } | ||
4893 | } | ||
4894 | // the next frame should start with the sample | ||
4895 | if (f->current_loc != sample_number) return error(f, VORBIS_seek_failed); | ||
4896 | return 1; | ||
4897 | } | ||
4898 | |||
4899 | int stb_vorbis_seek(stb_vorbis *f, unsigned int sample_number) | ||
4900 | { | ||
4901 | if (!stb_vorbis_seek_frame(f, sample_number)) | ||
4902 | return 0; | ||
4903 | |||
4904 | if (sample_number != f->current_loc) { | ||
4905 | int n; | ||
4906 | uint32 frame_start = f->current_loc; | ||
4907 | stb_vorbis_get_frame_float(f, &n, NULL); | ||
4908 | assert(sample_number > frame_start); | ||
4909 | assert(f->channel_buffer_start + (int) (sample_number-frame_start) <= f->channel_buffer_end); | ||
4910 | f->channel_buffer_start += (sample_number - frame_start); | ||
4911 | } | ||
4912 | |||
4913 | return 1; | ||
4914 | } | ||
4915 | |||
4916 | int stb_vorbis_seek_start(stb_vorbis *f) | ||
4917 | { | ||
4918 | if (IS_PUSH_MODE(f)) { return error(f, VORBIS_invalid_api_mixing); } | ||
4919 | set_file_offset(f, f->first_audio_page_offset); | ||
4920 | f->previous_length = 0; | ||
4921 | f->first_decode = TRUE; | ||
4922 | f->next_seg = -1; | ||
4923 | return vorbis_pump_first_frame(f); | ||
4924 | } | ||
4925 | |||
4926 | unsigned int stb_vorbis_stream_length_in_samples(stb_vorbis *f) | ||
4927 | { | ||
4928 | unsigned int restore_offset, previous_safe; | ||
4929 | unsigned int end, last_page_loc; | ||
4930 | |||
4931 | if (IS_PUSH_MODE(f)) return error(f, VORBIS_invalid_api_mixing); | ||
4932 | if (!f->total_samples) { | ||
4933 | unsigned int last; | ||
4934 | uint32 lo,hi; | ||
4935 | char header[6]; | ||
4936 | |||
4937 | // first, store the current decode position so we can restore it | ||
4938 | restore_offset = stb_vorbis_get_file_offset(f); | ||
4939 | |||
4940 | // now we want to seek back 64K from the end (the last page must | ||
4941 | // be at most a little less than 64K, but let's allow a little slop) | ||
4942 | if (f->stream_len >= 65536 && f->stream_len-65536 >= f->first_audio_page_offset) | ||
4943 | previous_safe = f->stream_len - 65536; | ||
4944 | else | ||
4945 | previous_safe = f->first_audio_page_offset; | ||
4946 | |||
4947 | set_file_offset(f, previous_safe); | ||
4948 | // previous_safe is now our candidate 'earliest known place that seeking | ||
4949 | // to will lead to the final page' | ||
4950 | |||
4951 | if (!vorbis_find_page(f, &end, &last)) { | ||
4952 | // if we can't find a page, we're hosed! | ||
4953 | f->error = VORBIS_cant_find_last_page; | ||
4954 | f->total_samples = 0xffffffff; | ||
4955 | goto done; | ||
4956 | } | ||
4957 | |||
4958 | // check if there are more pages | ||
4959 | last_page_loc = stb_vorbis_get_file_offset(f); | ||
4960 | |||
4961 | // stop when the last_page flag is set, not when we reach eof; | ||
4962 | // this allows us to stop short of a 'file_section' end without | ||
4963 | // explicitly checking the length of the section | ||
4964 | while (!last) { | ||
4965 | set_file_offset(f, end); | ||
4966 | if (!vorbis_find_page(f, &end, &last)) { | ||
4967 | // the last page we found didn't have the 'last page' flag | ||
4968 | // set. whoops! | ||
4969 | break; | ||
4970 | } | ||
4971 | previous_safe = last_page_loc+1; | ||
4972 | last_page_loc = stb_vorbis_get_file_offset(f); | ||
4973 | } | ||
4974 | |||
4975 | set_file_offset(f, last_page_loc); | ||
4976 | |||
4977 | // parse the header | ||
4978 | getn(f, (unsigned char *)header, 6); | ||
4979 | // extract the absolute granule position | ||
4980 | lo = get32(f); | ||
4981 | hi = get32(f); | ||
4982 | if (lo == 0xffffffff && hi == 0xffffffff) { | ||
4983 | f->error = VORBIS_cant_find_last_page; | ||
4984 | f->total_samples = SAMPLE_unknown; | ||
4985 | goto done; | ||
4986 | } | ||
4987 | if (hi) | ||
4988 | lo = 0xfffffffe; // saturate | ||
4989 | f->total_samples = lo; | ||
4990 | |||
4991 | f->p_last.page_start = last_page_loc; | ||
4992 | f->p_last.page_end = end; | ||
4993 | f->p_last.last_decoded_sample = lo; | ||
4994 | |||
4995 | done: | ||
4996 | set_file_offset(f, restore_offset); | ||
4997 | } | ||
4998 | return f->total_samples == SAMPLE_unknown ? 0 : f->total_samples; | ||
4999 | } | ||
5000 | |||
5001 | float stb_vorbis_stream_length_in_seconds(stb_vorbis *f) | ||
5002 | { | ||
5003 | return stb_vorbis_stream_length_in_samples(f) / (float) f->sample_rate; | ||
5004 | } | ||
5005 | |||
5006 | |||
5007 | |||
5008 | int stb_vorbis_get_frame_float(stb_vorbis *f, int *channels, float ***output) | ||
5009 | { | ||
5010 | int len, right,left,i; | ||
5011 | if (IS_PUSH_MODE(f)) return error(f, VORBIS_invalid_api_mixing); | ||
5012 | |||
5013 | if (!vorbis_decode_packet(f, &len, &left, &right)) { | ||
5014 | f->channel_buffer_start = f->channel_buffer_end = 0; | ||
5015 | return 0; | ||
5016 | } | ||
5017 | |||
5018 | len = vorbis_finish_frame(f, len, left, right); | ||
5019 | for (i=0; i < f->channels; ++i) | ||
5020 | f->outputs[i] = f->channel_buffers[i] + left; | ||
5021 | |||
5022 | f->channel_buffer_start = left; | ||
5023 | f->channel_buffer_end = left+len; | ||
5024 | |||
5025 | if (channels) *channels = f->channels; | ||
5026 | if (output) *output = f->outputs; | ||
5027 | return len; | ||
5028 | } | ||
5029 | |||
5030 | #ifndef STB_VORBIS_NO_STDIO | ||
5031 | |||
5032 | stb_vorbis * stb_vorbis_open_file_section(FILE *file, int close_on_free, int *error, const stb_vorbis_alloc *alloc, unsigned int length) | ||
5033 | { | ||
5034 | stb_vorbis *f, p; | ||
5035 | vorbis_init(&p, alloc); | ||
5036 | p.f = file; | ||
5037 | p.f_start = (uint32) ftell(file); | ||
5038 | p.stream_len = length; | ||
5039 | p.close_on_free = close_on_free; | ||
5040 | if (start_decoder(&p)) { | ||
5041 | f = vorbis_alloc(&p); | ||
5042 | if (f) { | ||
5043 | *f = p; | ||
5044 | vorbis_pump_first_frame(f); | ||
5045 | return f; | ||
5046 | } | ||
5047 | } | ||
5048 | if (error) *error = p.error; | ||
5049 | vorbis_deinit(&p); | ||
5050 | return NULL; | ||
5051 | } | ||
5052 | |||
5053 | stb_vorbis * stb_vorbis_open_file(FILE *file, int close_on_free, int *error, const stb_vorbis_alloc *alloc) | ||
5054 | { | ||
5055 | unsigned int len, start; | ||
5056 | start = (unsigned int) ftell(file); | ||
5057 | fseek(file, 0, SEEK_END); | ||
5058 | len = (unsigned int) (ftell(file) - start); | ||
5059 | fseek(file, start, SEEK_SET); | ||
5060 | return stb_vorbis_open_file_section(file, close_on_free, error, alloc, len); | ||
5061 | } | ||
5062 | |||
5063 | stb_vorbis * stb_vorbis_open_filename(const char *filename, int *error, const stb_vorbis_alloc *alloc) | ||
5064 | { | ||
5065 | FILE *f; | ||
5066 | #if defined(_WIN32) && defined(__STDC_WANT_SECURE_LIB__) | ||
5067 | if (0 != fopen_s(&f, filename, "rb")) | ||
5068 | f = NULL; | ||
5069 | #else | ||
5070 | f = fopen(filename, "rb"); | ||
5071 | #endif | ||
5072 | if (f) | ||
5073 | return stb_vorbis_open_file(f, TRUE, error, alloc); | ||
5074 | if (error) *error = VORBIS_file_open_failure; | ||
5075 | return NULL; | ||
5076 | } | ||
5077 | #endif // STB_VORBIS_NO_STDIO | ||
5078 | |||
5079 | stb_vorbis * stb_vorbis_open_memory(const unsigned char *data, int len, int *error, const stb_vorbis_alloc *alloc) | ||
5080 | { | ||
5081 | stb_vorbis *f, p; | ||
5082 | if (data == NULL) return NULL; | ||
5083 | vorbis_init(&p, alloc); | ||
5084 | p.stream = (uint8 *) data; | ||
5085 | p.stream_end = (uint8 *) data + len; | ||
5086 | p.stream_start = (uint8 *) p.stream; | ||
5087 | p.stream_len = len; | ||
5088 | p.push_mode = FALSE; | ||
5089 | if (start_decoder(&p)) { | ||
5090 | f = vorbis_alloc(&p); | ||
5091 | if (f) { | ||
5092 | *f = p; | ||
5093 | vorbis_pump_first_frame(f); | ||
5094 | if (error) *error = VORBIS__no_error; | ||
5095 | return f; | ||
5096 | } | ||
5097 | } | ||
5098 | if (error) *error = p.error; | ||
5099 | vorbis_deinit(&p); | ||
5100 | return NULL; | ||
5101 | } | ||
5102 | |||
5103 | #ifndef STB_VORBIS_NO_INTEGER_CONVERSION | ||
5104 | #define PLAYBACK_MONO 1 | ||
5105 | #define PLAYBACK_LEFT 2 | ||
5106 | #define PLAYBACK_RIGHT 4 | ||
5107 | |||
5108 | #define L (PLAYBACK_LEFT | PLAYBACK_MONO) | ||
5109 | #define C (PLAYBACK_LEFT | PLAYBACK_RIGHT | PLAYBACK_MONO) | ||
5110 | #define R (PLAYBACK_RIGHT | PLAYBACK_MONO) | ||
5111 | |||
5112 | static int8 channel_position[7][6] = | ||
5113 | { | ||
5114 | { 0 }, | ||
5115 | { C }, | ||
5116 | { L, R }, | ||
5117 | { L, C, R }, | ||
5118 | { L, R, L, R }, | ||
5119 | { L, C, R, L, R }, | ||
5120 | { L, C, R, L, R, C }, | ||
5121 | }; | ||
5122 | |||
5123 | |||
5124 | #ifndef STB_VORBIS_NO_FAST_SCALED_FLOAT | ||
5125 | typedef union { | ||
5126 | float f; | ||
5127 | int i; | ||
5128 | } float_conv; | ||
5129 | typedef char stb_vorbis_float_size_test[sizeof(float)==4 && sizeof(int) == 4]; | ||
5130 | #define FASTDEF(x) float_conv x | ||
5131 | // add (1<<23) to convert to int, then divide by 2^SHIFT, then add 0.5/2^SHIFT to round | ||
5132 | #define MAGIC(SHIFT) (1.5f * (1 << (23-SHIFT)) + 0.5f/(1 << SHIFT)) | ||
5133 | #define ADDEND(SHIFT) (((150-SHIFT) << 23) + (1 << 22)) | ||
5134 | #define FAST_SCALED_FLOAT_TO_INT(temp,x,s) (temp.f = (x) + MAGIC(s), temp.i - ADDEND(s)) | ||
5135 | #define check_endianness() | ||
5136 | #else | ||
5137 | #define FAST_SCALED_FLOAT_TO_INT(temp,x,s) ((int) ((x) * (1 << (s)))) | ||
5138 | #define check_endianness() | ||
5139 | #define FASTDEF(x) | ||
5140 | #endif | ||
5141 | |||
5142 | static void copy_samples(short *dest, float *src, int len) | ||
5143 | { | ||
5144 | int i; | ||
5145 | check_endianness(); | ||
5146 | for (i=0; i < len; ++i) { | ||
5147 | FASTDEF(temp); | ||
5148 | int v = FAST_SCALED_FLOAT_TO_INT(temp, src[i],15); | ||
5149 | if ((unsigned int) (v + 32768) > 65535) | ||
5150 | v = v < 0 ? -32768 : 32767; | ||
5151 | dest[i] = v; | ||
5152 | } | ||
5153 | } | ||
5154 | |||
5155 | static void compute_samples(int mask, short *output, int num_c, float **data, int d_offset, int len) | ||
5156 | { | ||
5157 | #define BUFFER_SIZE 32 | ||
5158 | float buffer[BUFFER_SIZE]; | ||
5159 | int i,j,o,n = BUFFER_SIZE; | ||
5160 | check_endianness(); | ||
5161 | for (o = 0; o < len; o += BUFFER_SIZE) { | ||
5162 | memset(buffer, 0, sizeof(buffer)); | ||
5163 | if (o + n > len) n = len - o; | ||
5164 | for (j=0; j < num_c; ++j) { | ||
5165 | if (channel_position[num_c][j] & mask) { | ||
5166 | for (i=0; i < n; ++i) | ||
5167 | buffer[i] += data[j][d_offset+o+i]; | ||
5168 | } | ||
5169 | } | ||
5170 | for (i=0; i < n; ++i) { | ||
5171 | FASTDEF(temp); | ||
5172 | int v = FAST_SCALED_FLOAT_TO_INT(temp,buffer[i],15); | ||
5173 | if ((unsigned int) (v + 32768) > 65535) | ||
5174 | v = v < 0 ? -32768 : 32767; | ||
5175 | output[o+i] = v; | ||
5176 | } | ||
5177 | } | ||
5178 | } | ||
5179 | |||
5180 | static void compute_stereo_samples(short *output, int num_c, float **data, int d_offset, int len) | ||
5181 | { | ||
5182 | #define BUFFER_SIZE 32 | ||
5183 | float buffer[BUFFER_SIZE]; | ||
5184 | int i,j,o,n = BUFFER_SIZE >> 1; | ||
5185 | // o is the offset in the source data | ||
5186 | check_endianness(); | ||
5187 | for (o = 0; o < len; o += BUFFER_SIZE >> 1) { | ||
5188 | // o2 is the offset in the output data | ||
5189 | int o2 = o << 1; | ||
5190 | memset(buffer, 0, sizeof(buffer)); | ||
5191 | if (o + n > len) n = len - o; | ||
5192 | for (j=0; j < num_c; ++j) { | ||
5193 | int m = channel_position[num_c][j] & (PLAYBACK_LEFT | PLAYBACK_RIGHT); | ||
5194 | if (m == (PLAYBACK_LEFT | PLAYBACK_RIGHT)) { | ||
5195 | for (i=0; i < n; ++i) { | ||
5196 | buffer[i*2+0] += data[j][d_offset+o+i]; | ||
5197 | buffer[i*2+1] += data[j][d_offset+o+i]; | ||
5198 | } | ||
5199 | } else if (m == PLAYBACK_LEFT) { | ||
5200 | for (i=0; i < n; ++i) { | ||
5201 | buffer[i*2+0] += data[j][d_offset+o+i]; | ||
5202 | } | ||
5203 | } else if (m == PLAYBACK_RIGHT) { | ||
5204 | for (i=0; i < n; ++i) { | ||
5205 | buffer[i*2+1] += data[j][d_offset+o+i]; | ||
5206 | } | ||
5207 | } | ||
5208 | } | ||
5209 | for (i=0; i < (n<<1); ++i) { | ||
5210 | FASTDEF(temp); | ||
5211 | int v = FAST_SCALED_FLOAT_TO_INT(temp,buffer[i],15); | ||
5212 | if ((unsigned int) (v + 32768) > 65535) | ||
5213 | v = v < 0 ? -32768 : 32767; | ||
5214 | output[o2+i] = v; | ||
5215 | } | ||
5216 | } | ||
5217 | } | ||
5218 | |||
5219 | static void convert_samples_short(int buf_c, short **buffer, int b_offset, int data_c, float **data, int d_offset, int samples) | ||
5220 | { | ||
5221 | int i; | ||
5222 | if (buf_c != data_c && buf_c <= 2 && data_c <= 6) { | ||
5223 | static int channel_selector[3][2] = { {0}, {PLAYBACK_MONO}, {PLAYBACK_LEFT, PLAYBACK_RIGHT} }; | ||
5224 | for (i=0; i < buf_c; ++i) | ||
5225 | compute_samples(channel_selector[buf_c][i], buffer[i]+b_offset, data_c, data, d_offset, samples); | ||
5226 | } else { | ||
5227 | int limit = buf_c < data_c ? buf_c : data_c; | ||
5228 | for (i=0; i < limit; ++i) | ||
5229 | copy_samples(buffer[i]+b_offset, data[i]+d_offset, samples); | ||
5230 | for ( ; i < buf_c; ++i) | ||
5231 | memset(buffer[i]+b_offset, 0, sizeof(short) * samples); | ||
5232 | } | ||
5233 | } | ||
5234 | |||
5235 | int stb_vorbis_get_frame_short(stb_vorbis *f, int num_c, short **buffer, int num_samples) | ||
5236 | { | ||
5237 | float **output = NULL; | ||
5238 | int len = stb_vorbis_get_frame_float(f, NULL, &output); | ||
5239 | if (len > num_samples) len = num_samples; | ||
5240 | if (len) | ||
5241 | convert_samples_short(num_c, buffer, 0, f->channels, output, 0, len); | ||
5242 | return len; | ||
5243 | } | ||
5244 | |||
5245 | static void convert_channels_short_interleaved(int buf_c, short *buffer, int data_c, float **data, int d_offset, int len) | ||
5246 | { | ||
5247 | int i; | ||
5248 | check_endianness(); | ||
5249 | if (buf_c != data_c && buf_c <= 2 && data_c <= 6) { | ||
5250 | assert(buf_c == 2); | ||
5251 | for (i=0; i < buf_c; ++i) | ||
5252 | compute_stereo_samples(buffer, data_c, data, d_offset, len); | ||
5253 | } else { | ||
5254 | int limit = buf_c < data_c ? buf_c : data_c; | ||
5255 | int j; | ||
5256 | for (j=0; j < len; ++j) { | ||
5257 | for (i=0; i < limit; ++i) { | ||
5258 | FASTDEF(temp); | ||
5259 | float f = data[i][d_offset+j]; | ||
5260 | int v = FAST_SCALED_FLOAT_TO_INT(temp, f,15);//data[i][d_offset+j],15); | ||
5261 | if ((unsigned int) (v + 32768) > 65535) | ||
5262 | v = v < 0 ? -32768 : 32767; | ||
5263 | *buffer++ = v; | ||
5264 | } | ||
5265 | for ( ; i < buf_c; ++i) | ||
5266 | *buffer++ = 0; | ||
5267 | } | ||
5268 | } | ||
5269 | } | ||
5270 | |||
5271 | int stb_vorbis_get_frame_short_interleaved(stb_vorbis *f, int num_c, short *buffer, int num_shorts) | ||
5272 | { | ||
5273 | float **output; | ||
5274 | int len; | ||
5275 | if (num_c == 1) return stb_vorbis_get_frame_short(f,num_c,&buffer, num_shorts); | ||
5276 | len = stb_vorbis_get_frame_float(f, NULL, &output); | ||
5277 | if (len) { | ||
5278 | if (len*num_c > num_shorts) len = num_shorts / num_c; | ||
5279 | convert_channels_short_interleaved(num_c, buffer, f->channels, output, 0, len); | ||
5280 | } | ||
5281 | return len; | ||
5282 | } | ||
5283 | |||
5284 | int stb_vorbis_get_samples_short_interleaved(stb_vorbis *f, int channels, short *buffer, int num_shorts) | ||
5285 | { | ||
5286 | float **outputs; | ||
5287 | int len = num_shorts / channels; | ||
5288 | int n=0; | ||
5289 | int z = f->channels; | ||
5290 | if (z > channels) z = channels; | ||
5291 | while (n < len) { | ||
5292 | int k = f->channel_buffer_end - f->channel_buffer_start; | ||
5293 | if (n+k >= len) k = len - n; | ||
5294 | if (k) | ||
5295 | convert_channels_short_interleaved(channels, buffer, f->channels, f->channel_buffers, f->channel_buffer_start, k); | ||
5296 | buffer += k*channels; | ||
5297 | n += k; | ||
5298 | f->channel_buffer_start += k; | ||
5299 | if (n == len) break; | ||
5300 | if (!stb_vorbis_get_frame_float(f, NULL, &outputs)) break; | ||
5301 | } | ||
5302 | return n; | ||
5303 | } | ||
5304 | |||
5305 | int stb_vorbis_get_samples_short(stb_vorbis *f, int channels, short **buffer, int len) | ||
5306 | { | ||
5307 | float **outputs; | ||
5308 | int n=0; | ||
5309 | int z = f->channels; | ||
5310 | if (z > channels) z = channels; | ||
5311 | while (n < len) { | ||
5312 | int k = f->channel_buffer_end - f->channel_buffer_start; | ||
5313 | if (n+k >= len) k = len - n; | ||
5314 | if (k) | ||
5315 | convert_samples_short(channels, buffer, n, f->channels, f->channel_buffers, f->channel_buffer_start, k); | ||
5316 | n += k; | ||
5317 | f->channel_buffer_start += k; | ||
5318 | if (n == len) break; | ||
5319 | if (!stb_vorbis_get_frame_float(f, NULL, &outputs)) break; | ||
5320 | } | ||
5321 | return n; | ||
5322 | } | ||
5323 | |||
5324 | #ifndef STB_VORBIS_NO_STDIO | ||
5325 | int stb_vorbis_decode_filename(const char *filename, int *channels, int *sample_rate, short **output) | ||
5326 | { | ||
5327 | int data_len, offset, total, limit, error; | ||
5328 | short *data; | ||
5329 | stb_vorbis *v = stb_vorbis_open_filename(filename, &error, NULL); | ||
5330 | if (v == NULL) return -1; | ||
5331 | limit = v->channels * 4096; | ||
5332 | *channels = v->channels; | ||
5333 | if (sample_rate) | ||
5334 | *sample_rate = v->sample_rate; | ||
5335 | offset = data_len = 0; | ||
5336 | total = limit; | ||
5337 | data = (short *) malloc(total * sizeof(*data)); | ||
5338 | if (data == NULL) { | ||
5339 | stb_vorbis_close(v); | ||
5340 | return -2; | ||
5341 | } | ||
5342 | for (;;) { | ||
5343 | int n = stb_vorbis_get_frame_short_interleaved(v, v->channels, data+offset, total-offset); | ||
5344 | if (n == 0) break; | ||
5345 | data_len += n; | ||
5346 | offset += n * v->channels; | ||
5347 | if (offset + limit > total) { | ||
5348 | short *data2; | ||
5349 | total *= 2; | ||
5350 | data2 = (short *) realloc(data, total * sizeof(*data)); | ||
5351 | if (data2 == NULL) { | ||
5352 | free(data); | ||
5353 | stb_vorbis_close(v); | ||
5354 | return -2; | ||
5355 | } | ||
5356 | data = data2; | ||
5357 | } | ||
5358 | } | ||
5359 | *output = data; | ||
5360 | stb_vorbis_close(v); | ||
5361 | return data_len; | ||
5362 | } | ||
5363 | #endif // NO_STDIO | ||
5364 | |||
5365 | int stb_vorbis_decode_memory(const uint8 *mem, int len, int *channels, int *sample_rate, short **output) | ||
5366 | { | ||
5367 | int data_len, offset, total, limit, error; | ||
5368 | short *data; | ||
5369 | stb_vorbis *v = stb_vorbis_open_memory(mem, len, &error, NULL); | ||
5370 | if (v == NULL) return -1; | ||
5371 | limit = v->channels * 4096; | ||
5372 | *channels = v->channels; | ||
5373 | if (sample_rate) | ||
5374 | *sample_rate = v->sample_rate; | ||
5375 | offset = data_len = 0; | ||
5376 | total = limit; | ||
5377 | data = (short *) malloc(total * sizeof(*data)); | ||
5378 | if (data == NULL) { | ||
5379 | stb_vorbis_close(v); | ||
5380 | return -2; | ||
5381 | } | ||
5382 | for (;;) { | ||
5383 | int n = stb_vorbis_get_frame_short_interleaved(v, v->channels, data+offset, total-offset); | ||
5384 | if (n == 0) break; | ||
5385 | data_len += n; | ||
5386 | offset += n * v->channels; | ||
5387 | if (offset + limit > total) { | ||
5388 | short *data2; | ||
5389 | total *= 2; | ||
5390 | data2 = (short *) realloc(data, total * sizeof(*data)); | ||
5391 | if (data2 == NULL) { | ||
5392 | free(data); | ||
5393 | stb_vorbis_close(v); | ||
5394 | return -2; | ||
5395 | } | ||
5396 | data = data2; | ||
5397 | } | ||
5398 | } | ||
5399 | *output = data; | ||
5400 | stb_vorbis_close(v); | ||
5401 | return data_len; | ||
5402 | } | ||
5403 | #endif // STB_VORBIS_NO_INTEGER_CONVERSION | ||
5404 | |||
5405 | int stb_vorbis_get_samples_float_interleaved(stb_vorbis *f, int channels, float *buffer, int num_floats) | ||
5406 | { | ||
5407 | float **outputs; | ||
5408 | int len = num_floats / channels; | ||
5409 | int n=0; | ||
5410 | int z = f->channels; | ||
5411 | if (z > channels) z = channels; | ||
5412 | while (n < len) { | ||
5413 | int i,j; | ||
5414 | int k = f->channel_buffer_end - f->channel_buffer_start; | ||
5415 | if (n+k >= len) k = len - n; | ||
5416 | for (j=0; j < k; ++j) { | ||
5417 | for (i=0; i < z; ++i) | ||
5418 | *buffer++ = f->channel_buffers[i][f->channel_buffer_start+j]; | ||
5419 | for ( ; i < channels; ++i) | ||
5420 | *buffer++ = 0; | ||
5421 | } | ||
5422 | n += k; | ||
5423 | f->channel_buffer_start += k; | ||
5424 | if (n == len) | ||
5425 | break; | ||
5426 | if (!stb_vorbis_get_frame_float(f, NULL, &outputs)) | ||
5427 | break; | ||
5428 | } | ||
5429 | return n; | ||
5430 | } | ||
5431 | |||
5432 | int stb_vorbis_get_samples_float(stb_vorbis *f, int channels, float **buffer, int num_samples) | ||
5433 | { | ||
5434 | float **outputs; | ||
5435 | int n=0; | ||
5436 | int z = f->channels; | ||
5437 | if (z > channels) z = channels; | ||
5438 | while (n < num_samples) { | ||
5439 | int i; | ||
5440 | int k = f->channel_buffer_end - f->channel_buffer_start; | ||
5441 | if (n+k >= num_samples) k = num_samples - n; | ||
5442 | if (k) { | ||
5443 | for (i=0; i < z; ++i) | ||
5444 | memcpy(buffer[i]+n, f->channel_buffers[i]+f->channel_buffer_start, sizeof(float)*k); | ||
5445 | for ( ; i < channels; ++i) | ||
5446 | memset(buffer[i]+n, 0, sizeof(float) * k); | ||
5447 | } | ||
5448 | n += k; | ||
5449 | f->channel_buffer_start += k; | ||
5450 | if (n == num_samples) | ||
5451 | break; | ||
5452 | if (!stb_vorbis_get_frame_float(f, NULL, &outputs)) | ||
5453 | break; | ||
5454 | } | ||
5455 | return n; | ||
5456 | } | ||
5457 | #endif // STB_VORBIS_NO_PULLDATA_API | ||
5458 | |||
5459 | /* Version history | ||
5460 | 1.17 - 2019-07-08 - fix CVE-2019-13217, -13218, -13219, -13220, -13221, -13222, -13223 | ||
5461 | found with Mayhem by ForAllSecure | ||
5462 | 1.16 - 2019-03-04 - fix warnings | ||
5463 | 1.15 - 2019-02-07 - explicit failure if Ogg Skeleton data is found | ||
5464 | 1.14 - 2018-02-11 - delete bogus dealloca usage | ||
5465 | 1.13 - 2018-01-29 - fix truncation of last frame (hopefully) | ||
5466 | 1.12 - 2017-11-21 - limit residue begin/end to blocksize/2 to avoid large temp allocs in bad/corrupt files | ||
5467 | 1.11 - 2017-07-23 - fix MinGW compilation | ||
5468 | 1.10 - 2017-03-03 - more robust seeking; fix negative ilog(); clear error in open_memory | ||
5469 | 1.09 - 2016-04-04 - back out 'avoid discarding last frame' fix from previous version | ||
5470 | 1.08 - 2016-04-02 - fixed multiple warnings; fix setup memory leaks; | ||
5471 | avoid discarding last frame of audio data | ||
5472 | 1.07 - 2015-01-16 - fixed some warnings, fix mingw, const-correct API | ||
5473 | some more crash fixes when out of memory or with corrupt files | ||
5474 | 1.06 - 2015-08-31 - full, correct support for seeking API (Dougall Johnson) | ||
5475 | some crash fixes when out of memory or with corrupt files | ||
5476 | 1.05 - 2015-04-19 - don't define __forceinline if it's redundant | ||
5477 | 1.04 - 2014-08-27 - fix missing const-correct case in API | ||
5478 | 1.03 - 2014-08-07 - Warning fixes | ||
5479 | 1.02 - 2014-07-09 - Declare qsort compare function _cdecl on windows | ||
5480 | 1.01 - 2014-06-18 - fix stb_vorbis_get_samples_float | ||
5481 | 1.0 - 2014-05-26 - fix memory leaks; fix warnings; fix bugs in multichannel | ||
5482 | (API change) report sample rate for decode-full-file funcs | ||
5483 | 0.99996 - bracket #include <malloc.h> for macintosh compilation by Laurent Gomila | ||
5484 | 0.99995 - use union instead of pointer-cast for fast-float-to-int to avoid alias-optimization problem | ||
5485 | 0.99994 - change fast-float-to-int to work in single-precision FPU mode, remove endian-dependence | ||
5486 | 0.99993 - remove assert that fired on legal files with empty tables | ||
5487 | 0.99992 - rewind-to-start | ||
5488 | 0.99991 - bugfix to stb_vorbis_get_samples_short by Bernhard Wodo | ||
5489 | 0.9999 - (should have been 0.99990) fix no-CRT support, compiling as C++ | ||
5490 | 0.9998 - add a full-decode function with a memory source | ||
5491 | 0.9997 - fix a bug in the read-from-FILE case in 0.9996 addition | ||
5492 | 0.9996 - query length of vorbis stream in samples/seconds | ||
5493 | 0.9995 - bugfix to another optimization that only happened in certain files | ||
5494 | 0.9994 - bugfix to one of the optimizations that caused significant (but inaudible?) errors | ||
5495 | 0.9993 - performance improvements; runs in 99% to 104% of time of reference implementation | ||
5496 | 0.9992 - performance improvement of IMDCT; now performs close to reference implementation | ||
5497 | 0.9991 - performance improvement of IMDCT | ||
5498 | 0.999 - (should have been 0.9990) performance improvement of IMDCT | ||
5499 | 0.998 - no-CRT support from Casey Muratori | ||
5500 | 0.997 - bugfixes for bugs found by Terje Mathisen | ||
5501 | 0.996 - bugfix: fast-huffman decode initialized incorrectly for sparse codebooks; fixing gives 10% speedup - found by Terje Mathisen | ||
5502 | 0.995 - bugfix: fix to 'effective' overrun detection - found by Terje Mathisen | ||
5503 | 0.994 - bugfix: garbage decode on final VQ symbol of a non-multiple - found by Terje Mathisen | ||
5504 | 0.993 - bugfix: pushdata API required 1 extra byte for empty page (failed to consume final page if empty) - found by Terje Mathisen | ||
5505 | 0.992 - fixes for MinGW warning | ||
5506 | 0.991 - turn fast-float-conversion on by default | ||
5507 | 0.990 - fix push-mode seek recovery if you seek into the headers | ||
5508 | 0.98b - fix to bad release of 0.98 | ||
5509 | 0.98 - fix push-mode seek recovery; robustify float-to-int and support non-fast mode | ||
5510 | 0.97 - builds under c++ (typecasting, don't use 'class' keyword) | ||
5511 | 0.96 - somehow MY 0.95 was right, but the web one was wrong, so here's my 0.95 rereleased as 0.96, fixes a typo in the clamping code | ||
5512 | 0.95 - clamping code for 16-bit functions | ||
5513 | 0.94 - not publically released | ||
5514 | 0.93 - fixed all-zero-floor case (was decoding garbage) | ||
5515 | 0.92 - fixed a memory leak | ||
5516 | 0.91 - conditional compiles to omit parts of the API and the infrastructure to support them: STB_VORBIS_NO_PULLDATA_API, STB_VORBIS_NO_PUSHDATA_API, STB_VORBIS_NO_STDIO, STB_VORBIS_NO_INTEGER_CONVERSION | ||
5517 | 0.90 - first public release | ||
5518 | */ | ||
5519 | |||
5520 | #endif // STB_VORBIS_HEADER_ONLY | ||
5521 | |||
5522 | |||
5523 | /* | ||
5524 | ------------------------------------------------------------------------------ | ||
5525 | This software is available under 2 licenses -- choose whichever you prefer. | ||
5526 | ------------------------------------------------------------------------------ | ||
5527 | ALTERNATIVE A - MIT License | ||
5528 | Copyright (c) 2017 Sean Barrett | ||
5529 | Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
5530 | this software and associated documentation files (the "Software"), to deal in | ||
5531 | the Software without restriction, including without limitation the rights to | ||
5532 | use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies | ||
5533 | of the Software, and to permit persons to whom the Software is furnished to do | ||
5534 | so, subject to the following conditions: | ||
5535 | The above copyright notice and this permission notice shall be included in all | ||
5536 | copies or substantial portions of the Software. | ||
5537 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
5538 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
5539 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
5540 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
5541 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
5542 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
5543 | SOFTWARE. | ||
5544 | ------------------------------------------------------------------------------ | ||
5545 | ALTERNATIVE B - Public Domain (www.unlicense.org) | ||
5546 | This is free and unencumbered software released into the public domain. | ||
5547 | Anyone is free to copy, modify, publish, use, compile, sell, or distribute this | ||
5548 | software, either in source code form or as a compiled binary, for any purpose, | ||
5549 | commercial or non-commercial, and by any means. | ||
5550 | In jurisdictions that recognize copyright laws, the author or authors of this | ||
5551 | software dedicate any and all copyright interest in the software to the public | ||
5552 | domain. We make this dedication for the benefit of the public at large and to | ||
5553 | the detriment of our heirs and successors. We intend this dedication to be an | ||
5554 | overt act of relinquishment in perpetuity of all present and future rights to | ||
5555 | this software under copyright law. | ||
5556 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
5557 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
5558 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
5559 | AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | ||
5560 | ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | ||
5561 | WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
5562 | ------------------------------------------------------------------------------ | ||
5563 | */ | ||
diff --git a/src/media.c b/src/media.c index c447704b..c0d6d3de 100644 --- a/src/media.c +++ b/src/media.c | |||
@@ -182,13 +182,13 @@ void setData_Media(iMedia *d, iGmLinkId linkId, const iString *mime, const iBloc | |||
182 | else { | 182 | else { |
183 | audio = at_PtrArray(&d->audio, existing - 1); | 183 | audio = at_PtrArray(&d->audio, existing - 1); |
184 | iAssert(equal_String(&audio->props.mime, mime)); /* MIME cannot change */ | 184 | iAssert(equal_String(&audio->props.mime, mime)); /* MIME cannot change */ |
185 | updateSourceData_Player(audio->player, data, append_PlayerUpdate); | 185 | updateSourceData_Player(audio->player, mime, data, append_PlayerUpdate); |
186 | if (!isStarted_Player(audio->player)) { | 186 | if (!isStarted_Player(audio->player)) { |
187 | /* Maybe the previous updates didn't have enough data. */ | 187 | /* Maybe the previous updates didn't have enough data. */ |
188 | start_Player(audio->player); | 188 | start_Player(audio->player); |
189 | } | 189 | } |
190 | if (!isPartial) { | 190 | if (!isPartial) { |
191 | updateSourceData_Player(audio->player, NULL, complete_PlayerUpdate); | 191 | updateSourceData_Player(audio->player, NULL, NULL, complete_PlayerUpdate); |
192 | } | 192 | } |
193 | } | 193 | } |
194 | } | 194 | } |
@@ -209,9 +209,9 @@ void setData_Media(iMedia *d, iGmLinkId linkId, const iString *mime, const iBloc | |||
209 | audio->props.linkId = linkId; /* TODO: use a hash? */ | 209 | audio->props.linkId = linkId; /* TODO: use a hash? */ |
210 | audio->props.isPermanent = !allowHide; | 210 | audio->props.isPermanent = !allowHide; |
211 | set_String(&audio->props.mime, mime); | 211 | set_String(&audio->props.mime, mime); |
212 | updateSourceData_Player(audio->player, data, replace_PlayerUpdate); | 212 | updateSourceData_Player(audio->player, mime, data, replace_PlayerUpdate); |
213 | if (!isPartial) { | 213 | if (!isPartial) { |
214 | updateSourceData_Player(audio->player, NULL, complete_PlayerUpdate); | 214 | updateSourceData_Player(audio->player, NULL, NULL, complete_PlayerUpdate); |
215 | } | 215 | } |
216 | pushBack_PtrArray(&d->audio, audio); | 216 | pushBack_PtrArray(&d->audio, audio); |
217 | /* TEST: Start playing right away. */ | 217 | /* TEST: Start playing right away. */ |