/** Get associated audio stream */
MRCP_DECLARE(const mpf_audio_stream_t*) mrcp_application_audio_stream_get(const mrcp_channel_t *channel)
{
if(!channel || !channel->termination) {
return NULL;
}
return mpf_termination_audio_stream_get(channel->termination);
}
/** Get codec descriptor of the audio sink stream */
const mpf_codec_descriptor_t* mrcp_engine_sink_stream_codec_get(mrcp_engine_channel_t *channel)
{
if(channel && channel->termination) {
mpf_audio_stream_t *audio_stream = mpf_termination_audio_stream_get(channel->termination);
if(audio_stream) {
return audio_stream->tx_descriptor;
}
}
return NULL;
}
/** Get codec descriptor of sink stream */
MRCP_DECLARE(const mpf_codec_descriptor_t*) mrcp_application_sink_descriptor_get(const mrcp_channel_t *channel)
{
mpf_audio_stream_t *audio_stream;
if(!channel || !channel->termination) {
return NULL;
}
audio_stream = mpf_termination_audio_stream_get(channel->termination);
if(!audio_stream) {
return NULL;
}
return audio_stream->tx_descriptor;
}
static apt_bool_t mrcp_client_channel_modify(mrcp_client_session_t *session, mrcp_channel_t *channel, apt_bool_t enable)
{
int index;
if(!session->offer) {
return FALSE;
}
if(!channel->resource) {
return FALSE;
}
apt_obj_log(APT_LOG_MARK,APT_PRIO_NOTICE,session->base.log_obj,"Modify Control Channel "APT_NAMESIDRES_FMT" [%d]",
MRCP_SESSION_NAMESID(session),
channel->resource->name.buf,
enable);
if(mrcp_client_channel_find(session,channel,&index) == TRUE) {
mrcp_control_descriptor_t *control_media = mrcp_session_control_media_get(session->offer,(apr_size_t)index);
if(control_media) {
control_media->port = (enable == TRUE) ? TCP_DISCARD_PORT : 0;
}
if(channel->termination && channel->rtp_termination_slot) {
mpf_audio_stream_t *audio_stream = mpf_termination_audio_stream_get(
channel->termination);
mpf_rtp_media_descriptor_t *audio_media = mrcp_session_audio_media_get(
session->offer,
channel->rtp_termination_slot->id);
if(audio_media && audio_stream) {
mpf_stream_direction_e direction = mpf_stream_reverse_direction_get(audio_stream->direction);
if(enable == TRUE) {
audio_media->direction |= direction;
}
else {
audio_media->direction &= ~direction;
}
audio_media->state = (audio_media->direction != STREAM_DIRECTION_NONE) ? MPF_MEDIA_ENABLED : MPF_MEDIA_DISABLED;
}
}
}
session->offer->resource_name = channel->resource->name;
session->offer->resource_state = enable;
return mrcp_client_session_offer_send(session);
}
static apt_bool_t mrcp_client_channel_add(mrcp_client_session_t *session, mrcp_channel_t *channel)
{
mpf_rtp_termination_descriptor_t *rtp_descriptor = NULL;
rtp_termination_slot_t *slot;
apr_pool_t *pool = session->base.pool;
mrcp_profile_t *profile = session->profile;
if(mrcp_client_channel_find(session,channel,NULL) == TRUE) {
/* update */
return mrcp_client_channel_modify(session,channel,TRUE);
}
if(!session->offer) {
session->offer = mrcp_session_descriptor_create(pool);
}
mrcp_client_session_state_set(session,SESSION_STATE_GENERATING_OFFER);
if(mrcp_session_version_get(session) == MRCP_VERSION_1) {
session->offer->resource_name = channel->resource->name;
session->offer->resource_state = TRUE;
}
else {
mrcp_control_descriptor_t *control_media;
if(!channel->control_channel) {
channel->control_channel = mrcp_client_control_channel_create(profile->connection_agent,channel,pool);
mrcp_client_control_channel_log_obj_set(channel->control_channel,session->base.log_obj);
}
control_media = mrcp_control_offer_create(pool);
control_media->id = mrcp_session_control_media_add(session->offer,control_media);
mrcp_cmid_add(control_media->cmid_arr,session->offer->control_media_arr->nelts);
control_media->resource_name = channel->resource->name;
if(mrcp_client_control_channel_add(channel->control_channel,control_media) == TRUE) {
channel->waiting_for_channel = TRUE;
mrcp_client_session_subrequest_add(session);
}
}
apt_obj_log(APT_LOG_MARK,APT_PRIO_NOTICE,session->base.log_obj,"Add Control Channel "APT_NAMESIDRES_FMT,
MRCP_SESSION_NAMESID(session),
channel->resource->name.buf);
/* add control channel */
APR_ARRAY_PUSH(session->channels,mrcp_channel_t*) = channel;
/* add rtp termination slot */
slot = apr_array_push(session->terminations);
slot->waiting = FALSE;
slot->termination = NULL;
slot->descriptor = NULL;
slot->channel = channel;
slot->id = 0;
if(channel->termination) {
/* media termination mode */
mpf_termination_t *termination;
mpf_audio_stream_t *audio_stream;
if(!session->context) {
/* create media context first */
session->context = mpf_engine_context_create(
profile->media_engine,
session->base.name,
session,5,pool);
}
apt_obj_log(APT_LOG_MARK,APT_PRIO_DEBUG,session->base.log_obj,"Add Media Termination "APT_NAMESIDRES_FMT,
MRCP_SESSION_NAMESID(session),
mpf_termination_name_get(channel->termination));
if(mpf_engine_termination_message_add(
profile->media_engine,
MPF_ADD_TERMINATION,session->context,channel->termination,NULL,
&session->mpf_task_msg) == TRUE) {
channel->waiting_for_termination = TRUE;
mrcp_client_session_subrequest_add(session);
}
/* initialize rtp descriptor */
rtp_descriptor = apr_palloc(pool,sizeof(mpf_rtp_termination_descriptor_t));
mpf_rtp_termination_descriptor_init(rtp_descriptor);
rtp_descriptor->audio.settings = profile->rtp_settings;
audio_stream = mpf_termination_audio_stream_get(channel->termination);
if(audio_stream) {
mpf_rtp_media_descriptor_t *media;
media = apr_palloc(pool,sizeof(mpf_rtp_media_descriptor_t));
mpf_rtp_media_descriptor_init(media);
media->state = MPF_MEDIA_ENABLED;
media->direction = mpf_stream_reverse_direction_get(audio_stream->direction);
rtp_descriptor->audio.local = media;
if(audio_stream->capabilities) {
rtp_descriptor->audio.capabilities = mpf_stream_capabilities_clone(audio_stream->capabilities,pool);
rtp_descriptor->audio.capabilities->direction = media->direction;
}
}
/* create rtp termination */
termination = mpf_termination_create(profile->rtp_termination_factory,session,pool);
slot->termination = termination;
apt_obj_log(APT_LOG_MARK,APT_PRIO_DEBUG,session->base.log_obj,"Add Media Termination "APT_NAMESIDRES_FMT,
MRCP_SESSION_NAMESID(session),
mpf_termination_name_get(termination));
/* send add termination request (add to media context) */
if(mpf_engine_termination_message_add(
profile->media_engine,
MPF_ADD_TERMINATION,session->context,termination,rtp_descriptor,
&session->mpf_task_msg) == TRUE) {
slot->waiting = TRUE;
mrcp_client_session_subrequest_add(session);
}
mpf_engine_message_send(profile->media_engine,&session->mpf_task_msg);
}
else {
/* bypass media mode */
if(channel->rtp_termination_slot) {
rtp_descriptor = channel->rtp_termination_slot->descriptor;
if(rtp_descriptor) {
if(rtp_descriptor->audio.local) {
session->offer->ip = rtp_descriptor->audio.local->ip;
session->offer->ext_ip = rtp_descriptor->audio.local->ext_ip;
rtp_descriptor->audio.local->id = mrcp_session_audio_media_add(session->offer,rtp_descriptor->audio.local);
rtp_descriptor->audio.local->mid = session->offer->audio_media_arr->nelts;
slot->id = session->offer->audio_media_arr->nelts - 1;
}
}
}
}
slot->descriptor = rtp_descriptor;
channel->rtp_termination_slot = slot;
if(!session->subrequest_count) {
/* send offer to server */
mrcp_client_session_offer_send(session);
}
return TRUE;
}