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/*
* Copyright © 2016-2017 The TokTok team.
* Copyright © 2013-2015 Tox project.
*
* This file is part of Tox, the free peer to peer instant messenger.
*
* 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 AUDIO_H
#define AUDIO_H
#include "toxav.h"
#include "../toxcore/logger.h"
#include "../toxcore/util.h"
#include "pair.h"
#include <opus.h>
#include <pthread.h>
#define AUDIO_JITTERBUFFER_COUNT 3
#define AUDIO_MAX_SAMPLE_RATE 48000
#define AUDIO_MAX_CHANNEL_COUNT 2
#define AUDIO_START_SAMPLE_RATE 48000
#define AUDIO_START_BITRATE 48000
#define AUDIO_START_CHANNEL_COUNT 2
#define AUDIO_OPUS_PACKET_LOSS_PERC 10
#define AUDIO_OPUS_COMPLEXITY 10
#define AUDIO_DECODER_START_SAMPLE_RATE 48000
#define AUDIO_DECODER_START_CHANNEL_COUNT 1
#define AUDIO_MAX_FRAME_DURATION_MS 120
// ((sampling_rate_in_hz * frame_duration_in_ms) / 1000) * 2 // because PCM16 needs 2 bytes for 1 sample
// These are per frame and per channel.
#define AUDIO_MAX_BUFFER_SIZE_PCM16 ((AUDIO_MAX_SAMPLE_RATE * AUDIO_MAX_FRAME_DURATION_MS) / 1000)
#define AUDIO_MAX_BUFFER_SIZE_BYTES (AUDIO_MAX_BUFFER_SIZE_PCM16 * 2)
struct RTPMessage;
typedef struct ACSession_s {
const Logger *log;
/* encoding */
OpusEncoder *encoder;
int32_t le_sample_rate; /* Last encoder sample rate */
int32_t le_channel_count; /* Last encoder channel count */
int32_t le_bit_rate; /* Last encoder bit rate */
/* decoding */
OpusDecoder *decoder;
int32_t lp_channel_count; /* Last packet channel count */
int32_t lp_sampling_rate; /* Last packet sample rate */
int32_t lp_frame_duration; /* Last packet frame duration */
int32_t ld_sample_rate; /* Last decoder sample rate */
int32_t ld_channel_count; /* Last decoder channel count */
uint64_t ldrts; /* Last decoder reconfiguration time stamp */
void *j_buf;
pthread_mutex_t queue_mutex[1];
ToxAV *av;
uint32_t friend_number;
PAIR(toxav_audio_receive_frame_cb *, void *) acb; /* Audio frame receive callback */
} ACSession;
ACSession *ac_new(const Logger *log, ToxAV *av, uint32_t friend_number, toxav_audio_receive_frame_cb *cb,
void *cb_data);
void ac_kill(ACSession *ac);
void ac_iterate(ACSession *ac);
int ac_queue_message(void *acp, struct RTPMessage *msg);
int ac_reconfigure_encoder(ACSession *ac, int32_t bit_rate, int32_t sampling_rate, uint8_t channels);
#endif /* AUDIO_H */
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