/*
* GPAC - Multimedia Framework C SDK
*
* Authors: Arash Shafiei
* Copyright (c) Telecom ParisTech 2000-2013
* All rights reserved
*
* This file is part of GPAC / dashcast
*
* GPAC is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* GPAC 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef AUDIO_DATA_H_
#define AUDIO_DATA_H_
#define AUDIO_CB_SIZE 3
#define LIVE_FRAME_SIZE 1024
#define MAX_AUDIO_PACKET_SIZE (128 * 1024)
#include "../../modules/ffmpeg_in/ffmpeg_in.h"
#include "libavcodec/avcodec.h"
#include "libavutil/mem.h"
#include "libav_compat.h"
#include "circular_buffer.h"
#include <time.h>
//we force the number of channels between the decoder and the encoder: interleaved 16 bits stereo 44100Hz
#define DC_AUDIO_SAMPLE_RATE 44100
#define DC_AUDIO_NUM_CHANNELS 2
#define DC_AUDIO_CHANNEL_LAYOUT AV_CH_LAYOUT_STEREO
#define DC_AUDIO_SAMPLE_FORMAT AV_SAMPLE_FMT_S16
#define DC_AUDIO_MAX_CHUNCK_SIZE 192000
/*
* AudioInputData is designed to keep the data of input audio in a circular buffer.
* The circular buffer has its own mechanism for synchronization.
*/
typedef struct {
/* The circular buffer of input audio. Input audio is the audio frames after decoding. */
CircularBuffer circular_buf;
/* The user of circular buffer has an index to it, which is in this variable. */
Producer producer;
AVFrame *aframe;
int64_t next_pts;
int channels;
int samplerate;
} AudioInputData;
/*
* This structure corresponds to an entry of audio configuration in the configuration file
*/
typedef struct {
/* audio file name */
char filename[GF_MAX_PATH];
/* audio format */
char format[GF_MAX_PATH];
/* audio bitrate */
int bitrate;
/* audio samplerate */
int samplerate;
/* audio channel number */
int channels;
/* audio codec */
char codec[GF_MAX_PATH];
/* custom parameter to be passed directly to the encoder - free it once you're done */
char custom[GF_MAX_PATH];
/* used for source switching */
char source_id[GF_MAX_PATH];
time_t start_time;
time_t end_time;
/* RFC6381 codec name, only valid when VIDEO_MUXER == GPAC_INIT_VIDEO_MUXER_AVC1 */
char codec6381[GF_MAX_PATH];
} AudioDataConf;
/*
* Each node in a circular buffer is a pointer.
* To use the circular buffer for audio frame we must
* define the node. AudioDataNode simply contains
* an AVFrame.
*/
typedef struct {
uint8_t *abuf;
int abuf_size;
uint64_t channel_layout;
int sample_rate;
int format;
int channels;
} AudioDataNode;
void dc_audio_data_set_default(AudioDataConf *audio_data_conf);
/*
* Initialize an AudioInputData.
*
* @param audio_input_data [out] is the structure to be initialize.
* @param num_consumers [in] contains information on the number of users of circular buffer;
* which means the number of audio encoders.
* @param live [in] indicates the system is live
*
* @return 0 on success, -1 on failure.
*
* @note Must use dc_audio_data_destroy to free memory.
*/
int dc_audio_input_data_init(AudioInputData *audio_input_data, int channels, int samplerate, int num_consumers, int mode);
/*
* Destroy an AudioInputData
*
* @param audio_input_data [in] the structure to be destroyed.
*/
void dc_audio_input_data_destroy(AudioInputData *audio_input_data);
/*
* Signal to all the users of the circular buffer in the AudioInputData
* which the current node is the last node to consume.
*
* @param audio_input_data [in] the structure to be signaled on.
*/
void dc_audio_inout_data_end_signal(AudioInputData *audio_input_data);
#endif /* AUDIO_DATA_H_ */