mpf_jitter_buffer_t* mpf_jitter_buffer_create(mpf_jb_config_t *jb_config, mpf_codec_descriptor_t *descriptor, mpf_codec_t *codec, apr_pool_t *pool)
{
size_t i;
mpf_frame_t *frame;
mpf_jitter_buffer_t *jb = apr_palloc(pool,sizeof(mpf_jitter_buffer_t));
if(!jb_config) {
/* create default jb config */
jb_config = apr_palloc(pool,sizeof(mpf_jb_config_t));
mpf_jb_config_init(jb_config);
}
/* validate jb config */
if(jb_config->initial_playout_delay == 0) {
/* default configuration */
jb_config->min_playout_delay = 10; /* ms */
jb_config->initial_playout_delay = 50; /* ms */
jb_config->max_playout_delay = 200; /* ms */
}
else {
if(jb_config->min_playout_delay > jb_config->initial_playout_delay) {
jb_config->min_playout_delay = jb_config->initial_playout_delay;
}
if(jb_config->max_playout_delay < jb_config->initial_playout_delay) {
jb_config->max_playout_delay = 2 * jb_config->initial_playout_delay;
}
}
jb->config = jb_config;
jb->codec = codec;
jb->frame_ts = (apr_uint32_t)mpf_codec_frame_samples_calculate(descriptor);
jb->frame_size = mpf_codec_frame_size_calculate(descriptor,codec->attribs);
jb->frame_count = jb->config->max_playout_delay / CODEC_FRAME_TIME_BASE;
jb->raw_data = apr_palloc(pool,jb->frame_size*jb->frame_count);
jb->frames = apr_palloc(pool,sizeof(mpf_frame_t)*jb->frame_count);
for(i=0; i<jb->frame_count; i++) {
frame = &jb->frames[i];
frame->type = MEDIA_FRAME_TYPE_NONE;
frame->marker = MPF_MARKER_NONE;
frame->codec_frame.buffer = jb->raw_data + i*jb->frame_size;
}
if(jb->config->initial_playout_delay % CODEC_FRAME_TIME_BASE != 0) {
jb->config->initial_playout_delay += CODEC_FRAME_TIME_BASE - jb->config->initial_playout_delay % CODEC_FRAME_TIME_BASE;
}
jb->playout_delay_ts = (apr_uint32_t)(jb->config->initial_playout_delay *
descriptor->channel_count * descriptor->sampling_rate / 1000);
jb->write_sync = 1;
jb->write_ts_offset = 0;
jb->write_ts = jb->read_ts = 0;
jb->event_write_base_ts = 0;
memset(&jb->event_write_base,0,sizeof(mpf_named_event_frame_t));
jb->event_write_update = NULL;
return jb;
}
MPF_DECLARE(apt_bool_t) mpf_rtp_stream_modify(mpf_audio_stream_t *stream, mpf_rtp_stream_descriptor_t *descriptor)
{
apt_bool_t status = TRUE;
mpf_rtp_stream_t *rtp_stream = stream->obj;
if(!rtp_stream) {
return FALSE;
}
if(!rtp_stream->local_media) {
/* create local media */
status = mpf_rtp_stream_local_media_create(rtp_stream,descriptor->local,descriptor->remote,descriptor->capabilities);
}
else if(descriptor->local) {
/* update local media */
status = mpf_rtp_stream_local_media_update(rtp_stream,descriptor->local,descriptor->capabilities);
}
if(descriptor->remote && status == TRUE) {
/* update remote media */
mpf_rtp_stream_remote_media_update(rtp_stream,descriptor->remote);
/* negotiate local and remote media */
mpf_rtp_stream_media_negotiate(rtp_stream);
}
if((rtp_stream->base->direction & STREAM_DIRECTION_SEND) == STREAM_DIRECTION_SEND) {
mpf_codec_list_t *codec_list = &rtp_stream->remote_media->codec_list;
rtp_stream->base->tx_descriptor = codec_list->primary_descriptor;
if(rtp_stream->base->tx_descriptor) {
rtp_stream->transmitter.samples_per_frame =
(apr_uint32_t)mpf_codec_frame_samples_calculate(rtp_stream->base->tx_descriptor);
}
if(codec_list->event_descriptor) {
rtp_stream->base->tx_event_descriptor = codec_list->event_descriptor;
}
}
if((rtp_stream->base->direction & STREAM_DIRECTION_RECEIVE) == STREAM_DIRECTION_RECEIVE) {
mpf_codec_list_t *codec_list = &rtp_stream->local_media->codec_list;
rtp_stream->base->rx_descriptor = codec_list->primary_descriptor;
if(codec_list->event_descriptor) {
rtp_stream->base->rx_event_descriptor = codec_list->event_descriptor;
}
}
if(!descriptor->local) {
descriptor->local = rtp_stream->local_media;
}
return status;
}
mpf_jitter_buffer_t* mpf_jitter_buffer_create(mpf_jb_config_t *jb_config, mpf_codec_t *codec, apr_pool_t *pool)
{
size_t i;
mpf_jitter_buffer_t *jb = apr_palloc(pool,sizeof(mpf_jitter_buffer_t));
if(!jb_config) {
/* create default jb config */
jb_config = apr_palloc(pool,sizeof(mpf_jb_config_t));
mpf_jb_config_init(jb_config);
}
/* validate jb config */
if(jb_config->initial_playout_delay == 0) {
/* default configuration */
jb_config->min_playout_delay = 10; /* ms */
jb_config->initial_playout_delay = 50; /* ms */
jb_config->max_playout_delay = 200; /* ms */
}
else {
if(jb_config->min_playout_delay > jb_config->initial_playout_delay) {
jb_config->min_playout_delay = jb_config->initial_playout_delay;
}
if(jb_config->max_playout_delay < jb_config->initial_playout_delay) {
jb_config->max_playout_delay = 2 * jb_config->initial_playout_delay;
}
}
jb->config = jb_config;
jb->frame_ts = mpf_codec_frame_samples_calculate(codec->descriptor);
jb->frame_size = mpf_codec_frame_size_calculate(codec->descriptor,codec->attribs);
jb->frame_count = jb->config->max_playout_delay / CODEC_FRAME_TIME_BASE;
jb->raw_data = apr_palloc(pool,jb->frame_size*jb->frame_count);
jb->frames = apr_palloc(pool,sizeof(mpf_frame_t)*jb->frame_count);
for(i=0; i<jb->frame_count; i++) {
jb->frames[i].type = MEDIA_FRAME_TYPE_NONE;
jb->frames[i].codec_frame.buffer = jb->raw_data + i*jb->frame_size;
}
jb->playout_delay_ts = jb->config->initial_playout_delay *
codec->descriptor->channel_count * codec->descriptor->sampling_rate / 1000;
jb->write_sync = 1;
jb->write_ts_offset = 0;
jb->write_ts = jb->read_ts = 0;
return jb;
}
