static apt_bool_t mrcp_server_engine_channels_update(mrcp_server_session_t *session)
{
mrcp_channel_t *channel;
mrcp_session_descriptor_t *descriptor = session->offer;
if(!descriptor) {
return FALSE;
}
mrcp_server_session_state_set(session,SESSION_STATE_INITIALIZING);
if(mrcp_session_version_get(session) == MRCP_VERSION_1) {
if(session->offer) {
channel = mrcp_server_channel_find(session,&descriptor->resource_name);
if(channel && channel->engine_channel) {
/* open engine channel */
if(mrcp_engine_channel_virtual_open(channel->engine_channel) == TRUE) {
mrcp_server_session_subrequest_add(session);
}
}
}
}
else {
int i;
mrcp_control_descriptor_t *control_descriptor;
for(i=0; i<session->channels->nelts; i++) {
channel = APR_ARRAY_IDX(session->channels,i,mrcp_channel_t*);
if(!channel || !channel->engine_channel) continue;
control_descriptor = mrcp_session_control_media_get(descriptor,i);
if(!control_descriptor) continue;
if(control_descriptor->port) {
/* open engine channel */
if(mrcp_engine_channel_virtual_open(channel->engine_channel) == TRUE) {
mrcp_server_session_subrequest_add(session);
}
}
else {
/* close engine channel */
if(mrcp_engine_channel_virtual_close(channel->engine_channel) == TRUE) {
mrcp_server_session_subrequest_add(session);
}
}
}
}
if(!session->subrequest_count) {
mrcp_server_session_answer_send(session);
}
return TRUE;
}
static apt_bool_t mrcp_client_control_media_answer_process(mrcp_client_session_t *session, mrcp_session_descriptor_t *descriptor)
{
mrcp_channel_t *channel;
mrcp_control_descriptor_t *control_descriptor;
int i;
int count = session->channels->nelts;
if(count != descriptor->control_media_arr->nelts) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Number of control channels [%d] != Number of control media in answer [%d]",
count,descriptor->control_media_arr->nelts);
count = descriptor->control_media_arr->nelts;
}
if(!session->base.id.length) {
/* initial answer received, store session id and add to session's table */
control_descriptor = mrcp_session_control_media_get(descriptor,0);
if(control_descriptor) {
session->base.id = control_descriptor->session_id;
}
}
/* update existing control channels */
for(i=0; i<count; i++) {
/* get existing channel */
channel = APR_ARRAY_IDX(session->channels,i,mrcp_channel_t*);
if(!channel) continue;
/* get control descriptor */
control_descriptor = mrcp_session_control_media_get(descriptor,i);
/* modify channel */
apt_obj_log(APT_LOG_MARK,APT_PRIO_DEBUG,session->base.log_obj,"Modify Control Channel "APT_NAMESID_FMT,
MRCP_SESSION_NAMESID(session));
if(mrcp_client_control_channel_modify(channel->control_channel,control_descriptor) == TRUE) {
channel->waiting_for_channel = TRUE;
mrcp_client_session_subrequest_add(session);
}
}
return TRUE;
}
static apt_bool_t mrcp_client_control_media_answer_process(mrcp_client_session_t *session, mrcp_session_descriptor_t *descriptor)
{
mrcp_channel_t *channel;
mrcp_control_descriptor_t *control_descriptor;
int i;
int count = session->channels->nelts;
if(count != descriptor->control_media_arr->nelts) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Number of control channels [%d] != Number of control media in answer [%d]",
count,descriptor->control_media_arr->nelts);
count = descriptor->control_media_arr->nelts;
}
if(!session->base.id.length) {
/* initial answer received, store session id and add to session's table */
control_descriptor = mrcp_session_control_media_get(descriptor,0);
if(control_descriptor) {
session->base.id = control_descriptor->session_id;
mrcp_client_session_add(session->application->client,session);
}
}
/* update existing control channels */
for(i=0; i<count; i++) {
/* get existing channel */
channel = *((mrcp_channel_t**)session->channels->elts + i);
if(!channel) continue;
/* get control descriptor */
control_descriptor = mrcp_session_control_media_get(descriptor,i);
/* modify channel */
apt_log(APT_LOG_MARK,APT_PRIO_DEBUG,"Modify Control Channel");
if(mrcp_client_control_channel_modify(channel->control_channel,control_descriptor) == TRUE) {
channel->waiting_for_channel = TRUE;
session->answer_flag_count++;
}
}
return TRUE;
}
/** Generate SDP string by MRCP descriptor */
MRCP_DECLARE(apr_size_t) sdp_string_generate_by_mrcp_descriptor(char *buffer, apr_size_t size, const mrcp_session_descriptor_t *descriptor, apt_bool_t offer)
{
apr_size_t i;
apr_size_t count;
apr_size_t audio_index = 0;
mpf_rtp_media_descriptor_t *audio_media;
apr_size_t video_index = 0;
mpf_rtp_media_descriptor_t *video_media;
apr_size_t control_index = 0;
mrcp_control_descriptor_t *control_media;
apr_size_t offset = 0;
const char *ip = descriptor->ext_ip.buf ? descriptor->ext_ip.buf : (descriptor->ip.buf ? descriptor->ip.buf : "0.0.0.0");
buffer[0] = '\0';
offset += snprintf(buffer+offset,size-offset,
"v=0\r\n"
"o=%s 0 0 IN IP4 %s\r\n"
"s=-\r\n"
"c=IN IP4 %s\r\n"
"t=0 0\r\n",
descriptor->origin.buf ? descriptor->origin.buf : "-",
ip,
ip);
count = mrcp_session_media_count_get(descriptor);
for(i=0; i<count; i++) {
audio_media = mrcp_session_audio_media_get(descriptor,audio_index);
if(audio_media && audio_media->id == i) {
/* generate audio media */
audio_index++;
offset += sdp_rtp_media_generate(buffer+offset,size-offset,descriptor,audio_media);
continue;
}
video_media = mrcp_session_video_media_get(descriptor,video_index);
if(video_media && video_media->id == i) {
/* generate video media */
video_index++;
offset += sdp_rtp_media_generate(buffer+offset,size-offset,descriptor,video_media);
continue;
}
control_media = mrcp_session_control_media_get(descriptor,control_index);
if(control_media && control_media->id == i) {
/** generate mrcp control media */
control_index++;
offset += sdp_control_media_generate(buffer+offset,size-offset,descriptor,control_media,offer);
continue;
}
}
return offset;
}
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_modify(mrcp_client_session_t *session, mrcp_channel_t *channel, apt_bool_t enable)
{
int index;
if(!session->offer) {
return FALSE;
}
if(!channel->resource_name) {
return FALSE;
}
apt_log(APT_LOG_MARK,APT_PRIO_NOTICE,"Modify Control Channel <%s@%s> [%d]",
mrcp_session_str(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) ? 9 : 0;
if(channel->termination && channel->termination->audio_stream) {
int i = mrcp_client_audio_media_find_by_mid(session->offer,control_media->cmid);
if(i >= 0) {
mpf_stream_mode_e mode = mpf_stream_mode_negotiate(channel->termination->audio_stream->mode);
mpf_rtp_media_descriptor_t *audio_media = mrcp_session_audio_media_get(session->offer,(apr_size_t)i);
if(audio_media) {
if(enable == TRUE) {
audio_media->mode |= mode;
}
else {
audio_media->mode &= ~mode;
}
audio_media->base.state = (audio_media->mode != STREAM_MODE_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);
}
/** Handle the responses sent to resource discover requests */
static apt_bool_t discover_application_on_resource_discover(mrcp_application_t *application, mrcp_session_t *session, mrcp_session_descriptor_t *descriptor, mrcp_sig_status_code_e status)
{
if(descriptor && status == MRCP_SIG_STATUS_CODE_SUCCESS) {
int i;
int count = descriptor->control_media_arr->nelts;
apt_log(APT_LOG_MARK,APT_PRIO_INFO,"On Resource Discover [%d]", count);
for(i = 0; i < count; i++) {
mrcp_control_descriptor_t *control_media = mrcp_session_control_media_get(descriptor,i);
if(control_media) {
apt_log(APT_LOG_MARK,APT_PRIO_INFO,"[%d] - %s", i,control_media->resource_name.buf);
}
}
}
else {
apt_log(APT_LOG_MARK,APT_PRIO_INFO,"Failed to Discover Resources");
}
mrcp_application_session_terminate(session);
return TRUE;
}
static apt_bool_t mrcp_server_control_media_offer_process(mrcp_server_session_t *session, mrcp_session_descriptor_t *descriptor)
{
mrcp_channel_t *channel;
mrcp_control_descriptor_t *control_descriptor;
int i;
int count = session->channels->nelts;
if(count > descriptor->control_media_arr->nelts) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Number of Control Channels [%d] > Number of Control Media in Offer [%d]",
count,descriptor->control_media_arr->nelts);
count = descriptor->control_media_arr->nelts;
}
/* update existing control channels */
for(i=0; i<count; i++) {
/* get existing termination */
channel = *((mrcp_channel_t**)session->channels->elts + i);
if(!channel) continue;
channel->waiting_for_channel = FALSE;
/* get control descriptor */
control_descriptor = mrcp_session_control_media_get(descriptor,i);
if(!control_descriptor) continue;
apt_log(APT_LOG_MARK,APT_PRIO_DEBUG,"Modify Control Channel [%d]",i);
if(channel->control_channel) {
/* send offer */
if(mrcp_server_control_channel_modify(channel->control_channel,control_descriptor) == TRUE) {
channel->waiting_for_channel = TRUE;
session->answer_flag_count++;
}
}
if(channel->waiting_for_channel == FALSE) {
mrcp_control_descriptor_t *answer = mrcp_control_answer_create(control_descriptor,channel->pool);
answer->port = 0;
answer->session_id = session->base.id;
mrcp_session_control_media_set(session->answer,channel->id,answer);
}
}
/* add new control channels */
for(; i<descriptor->control_media_arr->nelts; i++) {
mrcp_channel_t **slot;
/* get control descriptor */
control_descriptor = mrcp_session_control_media_get(descriptor,i);
if(!control_descriptor) continue;
/* create new MRCP channel instance */
channel = mrcp_server_channel_create(session,&control_descriptor->resource_name,i);
if(!channel) continue;
/* add to channel array */
control_descriptor->session_id = session->base.id;
apt_log(APT_LOG_MARK,APT_PRIO_DEBUG,"Add Control Channel [%d]",i);
slot = apr_array_push(session->channels);
*slot = channel;
if(channel->control_channel) {
/* send modify connection request */
if(mrcp_server_control_channel_add(channel->control_channel,control_descriptor) == TRUE) {
channel->waiting_for_channel = TRUE;
session->answer_flag_count++;
}
}
if(channel->waiting_for_channel == FALSE) {
mrcp_control_descriptor_t *answer = mrcp_control_answer_create(control_descriptor,channel->pool);
answer->port = 0;
answer->session_id = session->base.id;
mrcp_session_control_media_set(session->answer,channel->id,answer);
}
if(channel->engine_channel) {
/* open resource engine channel */
if(mrcp_engine_channel_open(channel->engine_channel) == TRUE) {
mpf_termination_t *termination = channel->engine_channel->termination;
session->answer_flag_count++;
if(termination) {
/* send add termination request (add to media context) */
if(mrcp_server_mpf_request_send(session,MPF_COMMAND_ADD,session->context,termination,NULL) == TRUE) {
channel->waiting_for_termination = TRUE;
session->answer_flag_count++;
}
}
}
}
}
return TRUE;
}