/** Create engine channel and sink media termination */
mrcp_engine_channel_t* mrcp_engine_sink_channel_create(
mrcp_resource_engine_t *engine,
const mrcp_engine_channel_method_vtable_t *channel_vtable,
const mpf_audio_stream_vtable_t *stream_vtable,
void *method_obj,
mpf_codec_descriptor_t *codec_descriptor,
apr_pool_t *pool)
{
mpf_audio_stream_t *audio_stream;
mpf_termination_t *termination;
/* create audio stream */
audio_stream = mpf_audio_stream_create(
method_obj, /* object to associate */
stream_vtable, /* virtual methods table of audio stream */
STREAM_MODE_SEND, /* stream mode/direction */
pool); /* pool to allocate memory from */
/* create media termination */
termination = mpf_raw_termination_create(
NULL, /* no object to associate */
audio_stream, /* audio stream */
NULL, /* no video stream */
pool); /* pool to allocate memory from */
/* create engine channel base */
return mrcp_engine_channel_create(
engine, /* resource engine */
channel_vtable, /* virtual methods table of engine channel */
method_obj, /* object to associate */
termination, /* media termination, used to terminate audio stream */
pool); /* pool to allocate memory from */
}
/** Create engine channel and sink media termination */
mrcp_engine_channel_t* mrcp_engine_sink_channel_create(
mrcp_engine_t *engine,
const mrcp_engine_channel_method_vtable_t *channel_vtable,
const mpf_audio_stream_vtable_t *stream_vtable,
void *method_obj,
mpf_codec_descriptor_t *codec_descriptor,
apr_pool_t *pool)
{
mpf_stream_capabilities_t *capabilities;
mpf_audio_stream_t *audio_stream;
mpf_termination_t *termination;
capabilities = mpf_sink_stream_capabilities_create(pool);
if(codec_descriptor) {
mpf_codec_capabilities_add(
&capabilities->codecs,
mpf_sample_rate_mask_get(codec_descriptor->sampling_rate),
codec_descriptor->name.buf);
}
else {
mpf_codec_default_capabilities_add(&capabilities->codecs);
}
/* create audio stream */
audio_stream = mpf_audio_stream_create(
method_obj, /* object to associate */
stream_vtable, /* virtual methods table of audio stream */
capabilities, /* stream capabilities */
pool); /* pool to allocate memory from */
if(!audio_stream) {
return NULL;
}
audio_stream->tx_descriptor = codec_descriptor;
/* create media termination */
termination = mpf_raw_termination_create(
NULL, /* no object to associate */
audio_stream, /* audio stream */
NULL, /* no video stream */
pool); /* pool to allocate memory from */
/* create engine channel base */
return mrcp_engine_channel_create(
engine, /* engine */
channel_vtable, /* virtual methods table of engine channel */
method_obj, /* object to associate */
termination, /* media termination, used to terminate audio stream */
pool); /* pool to allocate memory from */
}
/** Create demo synthesizer channel derived from engine channel base */
static mrcp_engine_channel_t* mrcp_swift_engine_channel_create(mrcp_engine_t *engine, apr_pool_t *pool)
{
mrcp_swift_engine_t *synth_engine = engine->obj;
mpf_stream_capabilities_t *capabilities;
mpf_termination_t *termination;
mrcp_engine_channel_t *channel;
/* create swift synth channel */
mrcp_swift_channel_t *synth_channel = apr_palloc(pool,sizeof(mrcp_swift_channel_t));
synth_channel->port = NULL;
synth_channel->tts_stream = 0;
synth_channel->channel = NULL;
synth_channel->audio_buffer = NULL;
synth_channel->speak_request = NULL;
synth_channel->stop_response = NULL;
synth_channel->paused = FALSE;
capabilities = mpf_source_stream_capabilities_create(pool);
mpf_codec_capabilities_add(
&capabilities->codecs,
synth_engine->sample_rates,
"LPCM");
/* create media termination */
termination = mrcp_engine_audio_termination_create(
synth_channel, /* object to associate */
&audio_stream_vtable, /* virtual methods table of audio stream */
capabilities, /* stream capabilities */
pool); /* pool to allocate memory from */
/* create engine channel base */
channel = mrcp_engine_channel_create(
engine, /* engine */
&channel_vtable, /* virtual methods table of engine channel */
synth_channel, /* object to associate */
termination, /* associated media termination */
pool); /* pool to allocate memory from */
if(channel) {
synth_channel->audio_buffer = mpf_buffer_create(pool);
}
synth_channel->channel = channel;
return channel;
}
static mrcp_engine_channel_t* recorder_engine_channel_create(mrcp_engine_t *engine, apr_pool_t *pool)
{
mpf_stream_capabilities_t *capabilities;
mpf_termination_t *termination;
/* create recorder channel */
recorder_channel_t *recorder_channel = apr_palloc(pool,sizeof(recorder_channel_t));
recorder_channel->record_request = NULL;
recorder_channel->stop_response = NULL;
recorder_channel->detector = mpf_activity_detector_create(pool);
recorder_channel->max_time = 0;
recorder_channel->cur_time = 0;
recorder_channel->cur_size = 0;
recorder_channel->file_name = NULL;
recorder_channel->audio_out = NULL;
capabilities = mpf_sink_stream_capabilities_create(pool);
mpf_codec_capabilities_add(
&capabilities->codecs,
MPF_SAMPLE_RATE_8000 | MPF_SAMPLE_RATE_16000,
"LPCM");
/* create media termination */
termination = mrcp_engine_audio_termination_create(
recorder_channel, /* object to associate */
&audio_stream_vtable, /* virtual methods table of audio stream */
capabilities, /* stream capabilities */
pool); /* pool to allocate memory from */
/* create engine channel base */
recorder_channel->channel = mrcp_engine_channel_create(
engine, /* engine */
&channel_vtable, /* virtual methods table of engine channel */
recorder_channel, /* object to associate */
termination, /* associated media termination */
pool); /* pool to allocate memory from */
return recorder_channel->channel;
}
/** Create demo synthesizer channel derived from engine channel base */
static mrcp_engine_channel_t* demo_synth_engine_channel_create(mrcp_engine_t *engine, apr_pool_t *pool)
{
mpf_stream_capabilities_t *capabilities;
mpf_termination_t *termination;
/* create demo synth channel */
demo_synth_channel_t *synth_channel = apr_palloc(pool,sizeof(demo_synth_channel_t));
synth_channel->demo_engine = engine->obj;
synth_channel->speak_request = NULL;
synth_channel->stop_response = NULL;
synth_channel->time_to_complete = 0;
synth_channel->paused = FALSE;
synth_channel->audio_file = NULL;
capabilities = mpf_source_stream_capabilities_create(pool);
mpf_codec_capabilities_add(
&capabilities->codecs,
MPF_SAMPLE_RATE_8000 | MPF_SAMPLE_RATE_16000,
"LPCM");
/* create media termination */
termination = mrcp_engine_audio_termination_create(
synth_channel, /* object to associate */
&audio_stream_vtable, /* virtual methods table of audio stream */
capabilities, /* stream capabilities */
pool); /* pool to allocate memory from */
/* create engine channel base */
synth_channel->channel = mrcp_engine_channel_create(
engine, /* engine */
&channel_vtable, /* virtual methods table of engine channel */
synth_channel, /* object to associate */
termination, /* associated media termination */
pool); /* pool to allocate memory from */
return synth_channel->channel;
}
