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Author: achaloyan <achaloyan@f001bc3a-424a-0410-80a0-a715b8f413a8>

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Date:   Fri Jun 19 19:14:14 2009 +0000

    svn-id: https://unimrcp.googlecode.com/svn/trunk@996 f001bc3a-424a-0410-80a0-a715b8f413a8



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13881 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Brian West
2009-06-20 03:40:46 +00:00
parent c57128abce
commit acec4777c2
5 changed files with 439 additions and 1 deletions
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libs/unimrcp/plugins/mrcp-pocketsphinx/src/mrcp_pocketsphinx.c Normal file
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/*
* Copyright 2008 Arsen Chaloyan
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Some mandatory rules for plugin implementation.
* 1. Each plugin MUST contain the following function as an entry point of the plugin
* MRCP_PLUGIN_DECLARE(mrcp_resource_engine_t*) mrcp_plugin_create(apr_pool_t *pool)
* 2. One and only one response MUST be sent back to the received request.
* 3. Methods (callbacks) of the MRCP engine channel MUST not block.
* (asynch response can be sent from the context of other thread)
* 4. Methods (callbacks) of the MPF engine stream MUST not block.
*/
#include "mrcp_resource_engine.h"
#include "mrcp_recog_resource.h"
#include "mrcp_recog_header.h"
#include "mrcp_generic_header.h"
#include "mrcp_message.h"
#include "mpf_activity_detector.h"
#include "apt_log.h"
typedef struct pocketsphinx_engine_t pocketsphinx_engine_t;
typedef struct pocketsphinx_recognizer_t pocketsphinx_recognizer_t;
/** Declaration of recognizer engine methods */
static apt_bool_t pocketsphinx_engine_destroy(mrcp_resource_engine_t *engine);
static apt_bool_t pocketsphinx_engine_open(mrcp_resource_engine_t *engine);
static apt_bool_t pocketsphinx_engine_close(mrcp_resource_engine_t *engine);
static mrcp_engine_channel_t* pocketsphinx_recognizer_create(mrcp_resource_engine_t *engine, apr_pool_t *pool);
static const struct mrcp_engine_method_vtable_t engine_vtable = {
pocketsphinx_engine_destroy,
pocketsphinx_engine_open,
pocketsphinx_engine_close,
pocketsphinx_recognizer_create
};
/** Declaration of recognizer channel methods */
static apt_bool_t pocketsphinx_recognizer_destroy(mrcp_engine_channel_t *channel);
static apt_bool_t pocketsphinx_recognizer_open(mrcp_engine_channel_t *channel);
static apt_bool_t pocketsphinx_recognizer_close(mrcp_engine_channel_t *channel);
static apt_bool_t pocketsphinx_recognizer_request_process(mrcp_engine_channel_t *channel, mrcp_message_t *request);
static const struct mrcp_engine_channel_method_vtable_t channel_vtable = {
pocketsphinx_recognizer_destroy,
pocketsphinx_recognizer_open,
pocketsphinx_recognizer_close,
pocketsphinx_recognizer_request_process
};
/** Declaration of recognizer audio stream methods */
static apt_bool_t pocketsphinx_stream_destroy(mpf_audio_stream_t *stream);
static apt_bool_t pocketsphinx_stream_open(mpf_audio_stream_t *stream);
static apt_bool_t pocketsphinx_stream_close(mpf_audio_stream_t *stream);
static apt_bool_t pocketsphinx_stream_write(mpf_audio_stream_t *stream, const mpf_frame_t *frame);
static const mpf_audio_stream_vtable_t audio_stream_vtable = {
pocketsphinx_stream_destroy,
NULL,
NULL,
NULL,
pocketsphinx_stream_open,
pocketsphinx_stream_close,
pocketsphinx_stream_write
};
/** Declaration of pocketsphinx engine */
struct pocketsphinx_engine_t {
mrcp_resource_engine_t *base;
};
/** Declaration of pocketsphinx recognizer */
struct pocketsphinx_recognizer_t {
/** Back pointer to engine */
pocketsphinx_engine_t *engine;
/** Engine channel base */
mrcp_engine_channel_t *channel;
};
/** Declare this macro to use log routine of the server, plugin is loaded from */
MRCP_PLUGIN_LOGGER_IMPLEMENT
/** Create pocketsphinx engine (engine is an aggregation of recognizers) */
MRCP_PLUGIN_DECLARE(mrcp_resource_engine_t*) mrcp_plugin_create(apr_pool_t *pool)
{
pocketsphinx_engine_t *engine = apr_palloc(pool,sizeof(pocketsphinx_engine_t));
/* create resource engine base */
engine->base = mrcp_resource_engine_create(
MRCP_RECOGNIZER_RESOURCE, /* MRCP resource identifier */
engine, /* object to associate */
&engine_vtable, /* virtual methods table of resource engine */
pool); /* pool to allocate memory from */
return engine->base;
}
static apt_bool_t pocketsphinx_engine_destroy(mrcp_resource_engine_t *engine)
{
return TRUE;
}
static apt_bool_t pocketsphinx_engine_open(mrcp_resource_engine_t *engine)
{
return TRUE;
}
static apt_bool_t pocketsphinx_engine_close(mrcp_resource_engine_t *engine)
{
return TRUE;
}
/** Create pocketsphinx recognizer */
static mrcp_engine_channel_t* pocketsphinx_recognizer_create(mrcp_resource_engine_t *engine, apr_pool_t *pool)
{
mrcp_engine_channel_t *channel;
pocketsphinx_recognizer_t *recognizer = apr_palloc(pool,sizeof(pocketsphinx_recognizer_t));
/* create engine channel base */
channel = mrcp_engine_sink_channel_create(
engine, /* resource engine */
&channel_vtable, /* virtual methods table of engine channel */
&audio_stream_vtable, /* virtual methods table of audio stream */
recognizer, /* object to associate */
NULL, /* codec descriptor might be NULL by default */
pool); /* pool to allocate memory from */
recognizer->channel = channel;
return channel;
}
/** Destroy engine channel */
static apt_bool_t pocketsphinx_recognizer_destroy(mrcp_engine_channel_t *channel)
{
return TRUE;
}
/** Open engine channel (asynchronous response MUST be sent)*/
static apt_bool_t pocketsphinx_recognizer_open(mrcp_engine_channel_t *channel)
{
return mrcp_engine_channel_open_respond(channel,TRUE);
}
/** Close engine channel (asynchronous response MUST be sent)*/
static apt_bool_t pocketsphinx_recognizer_close(mrcp_engine_channel_t *channel)
{
return mrcp_engine_channel_close_respond(channel);
}
/** Process RECOGNIZE request */
static apt_bool_t pocketsphinx_recognize(pocketsphinx_recognizer_t *recognizer, mrcp_message_t *request, mrcp_message_t *response)
{
return TRUE;
}
/** Process STOP request */
static apt_bool_t pocketsphinx_stop(pocketsphinx_recognizer_t *recognizer, mrcp_message_t *request, mrcp_message_t *response)
{
return TRUE;
}
static apt_bool_t pocketsphinx_recognizer_request_process(mrcp_engine_channel_t *channel, mrcp_message_t *request)
{
pocketsphinx_recognizer_t *recognizer = channel->method_obj;
apt_bool_t processed = FALSE;
mrcp_message_t *response = mrcp_response_create(request,request->pool);
switch(request->start_line.method_id) {
case RECOGNIZER_SET_PARAMS:
break;
case RECOGNIZER_GET_PARAMS:
break;
case RECOGNIZER_DEFINE_GRAMMAR:
break;
case RECOGNIZER_RECOGNIZE:
processed = pocketsphinx_recognize(recognizer,request,response);
break;
case RECOGNIZER_GET_RESULT:
break;
case RECOGNIZER_START_INPUT_TIMERS:
break;
case RECOGNIZER_STOP:
processed = pocketsphinx_stop(recognizer,request,response);
break;
default:
break;
}
if(processed == FALSE) {
/* send asynchronous response for not handled request */
mrcp_engine_channel_message_send(channel,response);
}
return TRUE;
}
static apt_bool_t pocketsphinx_stream_destroy(mpf_audio_stream_t *stream)
{
return TRUE;
}
static apt_bool_t pocketsphinx_stream_open(mpf_audio_stream_t *stream)
{
return TRUE;
}
static apt_bool_t pocketsphinx_stream_close(mpf_audio_stream_t *stream)
{
return TRUE;
}
static apt_bool_t pocketsphinx_stream_write(mpf_audio_stream_t *stream, const mpf_frame_t *frame)
{
return TRUE;
}