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/* 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 <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
#include <libavdevice/avdevice.h>
#include <libavutil/opt.h>
#include <pthread.h>
#include <AL/al.h>
#include <AL/alc.h>
#include "toxrtp.h"
#include "tox.h"
#include <SDL/SDL.h>
#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
extern SDL_Surface *screen;
typedef struct {
SDL_Overlay *bmp;
int width, height;
} VideoPicture;
typedef struct {
uint8_t send_audio;
uint8_t receive_audio;
uint8_t send_video;
uint8_t receive_video;
uint8_t support_send_audio;
uint8_t support_send_video;
uint8_t support_receive_audio;
uint8_t support_receive_video;
/* 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 */
ALCdevice *audio_capture_device;
OpusEncoder *audio_encoder;
int audio_bitrate;
/* audio decoding */
OpusDecoder *audio_decoder;
uint8_t req_video_refresh;
/* context for converting image format to something SDL can use*/
struct SwsContext *sws_SDL_r_ctx;
/* context for converting webcam image format to something the video encoder can use */
struct SwsContext *sws_ctx;
/* rendered video picture, ready for display */
VideoPicture video_picture;
RTPSession *_rtp_video;
RTPSession *_rtp_audio;
Tox* _messenger;
pthread_t encode_audio_thread;
pthread_t encode_video_thread;
pthread_t decode_audio_thread;
pthread_t decode_video_thread;
pthread_mutex_t rtp_msg_mutex_lock;
pthread_mutex_t avcodec_mutex_lock;
uint8_t quit;
SDL_Event SDL_event;
MSISession *_msi;
uint32_t _frame_rate;
} codec_state;
int display_received_frame(codec_state *cs, AVFrame *r_video_frame);
int init_receive_audio(codec_state *cs);
int init_decoder(codec_state *cs);
int init_send_video(codec_state *cs);
int init_send_audio(codec_state *cs);
int init_encoder(codec_state *cs);
int video_encoder_refresh(codec_state *cs, int bps);
void *encode_video_thread(void *arg);
void *encode_audio_thread(void *arg);
int video_decoder_refresh(codec_state *cs, int width, int height);
int handle_rtp_video_packet(codec_state *cs, RTPMessage *r_msg);
void *decode_video_thread(void *arg);
void *decode_audio_thread(void *arg);
#endif
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