From 1ffd161fa550d5334df7ee1aaa16bc369a1324b4 Mon Sep 17 00:00:00 2001
From: Jaakko Keränen <jaakko.keranen@iki.fi>
Date: Wed, 7 Oct 2020 12:31:31 +0300
Subject: Drawing an audio player UI

---
 src/audio/player.c | 29 ++++++++++++++++++++++++++---
 src/audio/player.h |  3 +++
 2 files changed, 29 insertions(+), 3 deletions(-)

(limited to 'src/audio')

diff --git a/src/audio/player.c b/src/audio/player.c
index 177613bb..2d6767ea 100644
--- a/src/audio/player.c
+++ b/src/audio/player.c
@@ -146,6 +146,7 @@ iDeclareType(ContentSpec)
 struct Impl_ContentSpec {
     SDL_AudioFormat inputFormat;
     SDL_AudioSpec   output;
+    uint64_t        totalSamples;
     iRanges         wavData;
 };
 
@@ -168,6 +169,8 @@ struct Impl_Decoder {
     size_t            inputPos;
     iSampleBuf        output;
     iMutex            outputMutex;
+    uint64_t          currentSample;
+    uint64_t          totalSamples; /* zero if unknown */
     iRanges           wavData;
 };
 
@@ -252,6 +255,7 @@ static enum iDecoderParseStatus parseWav_Decoder_(iDecoder *d, iRanges inputRang
         }
     }
     iGuardMutex(&d->outputMutex, write_SampleBuf(&d->output, samples, n));
+    d->currentSample += n;
     free(samples);
     return ok_DecoderParseStatus;
 }
@@ -305,6 +309,8 @@ void init_Decoder(iDecoder *d, iInputBuf *input, const iContentSpec *spec) {
                    spec->output.format,
                    spec->output.channels,
                    spec->output.samples * 2);
+    d->currentSample = 0;
+    d->totalSamples  = spec->totalSamples;
     init_Mutex(&d->outputMutex);
     d->thread = new_Thread(run_Decoder_);
     setUserData_Thread(d->thread, d);
@@ -366,6 +372,7 @@ static iContentSpec contentSpec_Player_(const iPlayer *d) {
             return content;
         }
         /* Read all the chunks. */
+        int16_t blockAlign = 0;
         while (!atEnd_Buffer(buf)) {
             readData_Buffer(buf, 4, magic);
             const size_t size = read32_Stream(is);
@@ -381,7 +388,7 @@ static iContentSpec contentSpec_Player_(const iPlayer *d) {
                 const int16_t  numChannels    = read16_Stream(is);
                 const int32_t  freq           = read32_Stream(is);
                 const uint32_t bytesPerSecond = readU32_Stream(is);
-                const int16_t  blockAlign     = read16_Stream(is);
+                blockAlign                    = read16_Stream(is);
                 const int16_t  bitsPerSample  = read16_Stream(is);
                 const uint16_t extSize        = (size == 18 ? readU16_Stream(is) : 0);
                 iUnused(bytesPerSecond);
@@ -418,7 +425,8 @@ static iContentSpec contentSpec_Player_(const iPlayer *d) {
                 }
             }
             else if (memcmp(magic, "data", 4) == 0) {
-                content.wavData = (iRanges){ pos_Stream(is), pos_Stream(is) + size };
+                content.wavData      = (iRanges){ pos_Stream(is), pos_Stream(is) + size };
+                content.totalSamples = (uint64_t) size_Range(&content.wavData) / blockAlign;
                 break;
             }
             else {
@@ -465,11 +473,16 @@ iBool isStarted_Player(const iPlayer *d) {
     return d->device != 0;
 }
 
-void setFormatHint_Player(iPlayer *d, const char *hint) {
+iBool isPaused_Player(const iPlayer *d) {
+    if (!d->device) return iTrue;
+    return SDL_GetAudioDeviceStatus(d->device) == SDL_AUDIO_PAUSED;
+}
 
+void setFormatHint_Player(iPlayer *d, const char *hint) {
 }
 
 void updateSourceData_Player(iPlayer *d, const iBlock *data, enum iPlayerUpdate update) {
+    /* TODO: Add MIME as argument */
     iInputBuf *input = d->data;
     lock_Mutex(&input->mtx);
     switch (update) {
@@ -527,3 +540,13 @@ void stop_Player(iPlayer *d) {
         d->decoder = NULL;
     }
 }
+
+float time_Player(const iPlayer *d) {
+    if (!d->decoder) return 0;
+    return (float) ((double) d->decoder->currentSample / (double) d->spec.freq);
+}
+
+float duration_Player(const iPlayer *d) {
+    if (!d->decoder) return 0;
+    return (float) ((double) d->decoder->totalSamples / (double) d->spec.freq);
+}
diff --git a/src/audio/player.h b/src/audio/player.h
index 2138c556..5c17ef6c 100644
--- a/src/audio/player.h
+++ b/src/audio/player.h
@@ -41,3 +41,6 @@ void    setPaused_Player    (iPlayer *, iBool isPaused);
 void    stop_Player         (iPlayer *);
 
 iBool   isStarted_Player    (const iPlayer *);
+iBool   isPaused_Player     (const iPlayer *);
+float   time_Player         (const iPlayer *);
+float   duration_Player     (const iPlayer *);
-- 
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