1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/* AV_codec.h
*
* Audio and video codec intitialisation, encoding/decoding and playback
*
* Copyright (C) 2013 Tox project All Rights Reserved.
*
* This file is part of Tox.
*
* Tox is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Tox is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Tox. If not, see <http://www.gnu.org/licenses/>.
*
*/
/*----------------------------------------------------------------------------------*/
#ifndef _AVCODEC_H_
#define _AVCODEC_H_
#include <stdio.h>
#include <math.h>
#include "../toxcore/tox.h"
/* Video encoding/decoding */
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
#include <libavdevice/avdevice.h>
#include <libavutil/opt.h>
/* Audio encoding/decoding */
#include <opus/opus.h>
/* ffmpeg VP8 codec ID */
#define VIDEO_CODEC AV_CODEC_ID_VP8
/* ffmpeg Opus codec ID */
#define AUDIO_CODEC AV_CODEC_ID_OPUS
/* default video bitrate in bytes/s */
#define VIDEO_BITRATE 10*1000
/* default audio bitrate in bytes/s */
#define AUDIO_BITRATE 64000
/* audio frame duration in miliseconds */
#define AUDIO_FRAME_DURATION 20
/* audio sample rate recommended to be 48kHz for Opus */
#define AUDIO_SAMPLE_RATE 48000
/* the amount of samples in one audio frame */
#define AUDIO_FRAME_SIZE AUDIO_SAMPLE_RATE*AUDIO_FRAME_DURATION/1000
/* the quit event for SDL */
#define FF_QUIT_EVENT (SDL_USEREVENT + 2)
#ifdef __linux__
#define VIDEO_DRIVER "video4linux2"
#define DEFAULT_WEBCAM "/dev/video0"
#endif
#if defined(_WIN32) || defined(__WIN32__) || defined (WIN32)
#define VIDEO_DRIVER "vfwcap"
#define DEFAULT_WEBCAM "0"
#endif
typedef struct _CodecState{
/* video encoding */
AVInputFormat *video_input_format;
AVFormatContext *video_format_ctx;
uint8_t video_stream;
AVCodecContext *webcam_decoder_ctx;
AVCodec *webcam_decoder;
AVCodecContext *video_encoder_ctx;
AVCodec *video_encoder;
/* video decoding */
AVCodecContext *video_decoder_ctx;
AVCodec *video_decoder;
/* audio encoding */
OpusEncoder *audio_encoder;
int audio_bitrate;
int audio_sample_rate;
/* audio decoding */
OpusDecoder *audio_decoder;
pthread_mutex_t ctrl_mutex;
uint32_t frame_rate;
} CodecState;
typedef struct _RTPMessage RTPMessage;
struct jitter_buffer *create_queue(int capacity);
int empty_queue(struct jitter_buffer *q);
int queue(struct jitter_buffer *q, RTPMessage *pk);
RTPMessage *dequeue(struct jitter_buffer *q, int *success);
CodecState* codec_init_session( uint32_t audio_bitrate,
uint16_t audio_frame_duration,
uint32_t audio_sample_rate,
uint32_t audio_channels,
uint32_t video_bitrate,
const char* webcam,
const char* webcam_driver );
void codec_terminate_session(CodecState* cs);
#endif
|
