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/** codec.h
*
* Audio and video codec intitialization, 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 _CODEC_H_
#define _CODEC_H_
#include <stdio.h>
#include <math.h>
#include <pthread.h>
#include <vpx/vpx_decoder.h>
#include <vpx/vpx_encoder.h>
#include <vpx/vp8dx.h>
#include <vpx/vp8cx.h>
#define VIDEO_CODEC_DECODER_INTERFACE (vpx_codec_vp8_dx())
#define VIDEO_CODEC_ENCODER_INTERFACE (vpx_codec_vp8_cx())
/* Audio encoding/decoding */
#include <opus.h>
typedef enum _Capabilities {
none,
a_encoding = 1 << 0,
a_decoding = 1 << 1,
v_encoding = 1 << 2,
v_decoding = 1 << 3
} Capabilities;
extern const uint16_t min_jbuf_size;
typedef struct _CodecState {
/* video encoding */
vpx_codec_ctx_t v_encoder;
uint32_t frame_counter;
/* video decoding */
vpx_codec_ctx_t v_decoder;
int bitrate;
int max_width;
int max_height;
/* audio encoding */
OpusEncoder *audio_encoder;
int audio_bitrate;
int audio_sample_rate;
int audio_encoder_channels;
/* audio decoding */
OpusDecoder *audio_decoder;
int audio_decoder_channels;
uint64_t capabilities; /* supports*/
/* Voice activity detection */
uint32_t EVAD_tolerance; /* In frames */
uint32_t EVAD_tolerance_cr;
} CodecState;
typedef struct _JitterBuffer {
RTPMessage **queue;
uint32_t size;
uint32_t capacity;
uint16_t bottom;
uint16_t top;
} JitterBuffer;
JitterBuffer *create_queue(unsigned int capacity);
void terminate_queue(JitterBuffer *q);
void queue(JitterBuffer *q, RTPMessage *pk);
RTPMessage *dequeue(JitterBuffer *q, int *success);
CodecState *codec_init_session ( uint32_t audio_bitrate,
uint16_t audio_frame_duration,
uint32_t audio_sample_rate,
uint32_t encoder_audio_channels,
uint32_t decoder_audio_channels,
uint32_t audio_VAD_tolerance_ms,
uint16_t max_video_width,
uint16_t max_video_height,
uint32_t video_bitrate );
void codec_terminate_session(CodecState *cs);
/* Reconfigure video encoder
return 0 on success.
return -1 on failure. */
int reconfigure_video_encoder_resolution(CodecState *cs, uint16_t width, uint16_t height);
int reconfigure_video_encoder_bitrate(CodecState *cs, uint32_t video_bitrate);
/* Calculate energy and return 1 if has voice, 0 if not */
int energy_VAD(CodecState *cs, int16_t *PCM, uint16_t frame_size, float energy);
#endif /* _CODEC_H_ */
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