inital checkin of unimrcp svn revision 985 from http://unimrcp.googlecode.com/svn/trunk/

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13790 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/unimrcp/plugins/demo-recog/Makefile.am

@@ -0,0 +1,16 @@
+MAINTAINERCLEANFILES 	   = Makefile.in
+
+INCLUDES                   = -Iinclude \
+                             -I$(top_srcdir)/libs/mrcp-engine/include \
+                             -I$(top_srcdir)/libs/mrcp/include \
+                             -I$(top_srcdir)/libs/mrcp/message/include \
+                             -I$(top_srcdir)/libs/mrcp/control/include \
+                             -I$(top_srcdir)/libs/mrcp/resources/include \
+                             -I$(top_srcdir)/libs/mpf/include \
+                             -I$(top_srcdir)/libs/apr-toolkit/include \
+                             $(UNIMRCP_APR_INCLUDES) $(UNIMRCP_APU_INCLUDES)
+
+plugin_LTLIBRARIES         = demorecog.la
+
+demorecog_la_SOURCES       = src/demo_recog_engine.c
+demorecog_la_LDFLAGS       = -module $(PLUGIN_LT_VERSION)

libs/unimrcp/plugins/demo-recog/demorecog.vcproj

@@ -0,0 +1,165 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="demorecog"
+	ProjectGUID="{B495B6D9-AF84-479D-B30A-313C16EF8BFD}"
+	RootNamespace="demorecog"
+	Keyword="Win32Proj"
+	>
+	<Platforms>
+		<Platform
+			Name="Win32"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|Win32"
+			ConfigurationType="2"
+			InheritedPropertySheets="$(SolutionDir)build\vsprops\unidebug.vsprops;$(SolutionDir)build\vsprops\unimrcpplugin.vsprops"
+			CharacterSet="1"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+				AdditionalIncludeDirectories="include"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|Win32"
+			ConfigurationType="2"
+			InheritedPropertySheets="$(SolutionDir)build\vsprops\unirelease.vsprops;$(SolutionDir)build\vsprops\unimrcpplugin.vsprops"
+			CharacterSet="1"
+			WholeProgramOptimization="1"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+				AdditionalIncludeDirectories="include"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<Filter
+			Name="include"
+			Filter="h;hpp;hxx;hm;inl;inc;xsd"
+			UniqueIdentifier="{93995380-89BD-4b04-88EB-625FBE52EBFB}"
+			>
+		</Filter>
+		<Filter
+			Name="src"
+			Filter="cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx"
+			>
+			<File
+				RelativePath=".\src\demo_recog_engine.c"
+				>
+			</File>
+		</Filter>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>

libs/unimrcp/plugins/demo-recog/src/demo_recog_engine.c

@@ -0,0 +1,508 @@
+/*
+ * 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_consumer_task.h"
+#include "apt_log.h"
+
+#define RECOG_ENGINE_TASK_NAME "Demo Recog Engine"
+
+typedef struct demo_recog_engine_t demo_recog_engine_t;
+typedef struct demo_recog_channel_t demo_recog_channel_t;
+typedef struct demo_recog_msg_t demo_recog_msg_t;
+
+/** Declaration of recognizer engine methods */
+static apt_bool_t demo_recog_engine_destroy(mrcp_resource_engine_t *engine);
+static apt_bool_t demo_recog_engine_open(mrcp_resource_engine_t *engine);
+static apt_bool_t demo_recog_engine_close(mrcp_resource_engine_t *engine);
+static mrcp_engine_channel_t* demo_recog_engine_channel_create(mrcp_resource_engine_t *engine, apr_pool_t *pool);
+
+static const struct mrcp_engine_method_vtable_t engine_vtable = {
+	demo_recog_engine_destroy,
+	demo_recog_engine_open,
+	demo_recog_engine_close,
+	demo_recog_engine_channel_create
+};
+
+
+/** Declaration of recognizer channel methods */
+static apt_bool_t demo_recog_channel_destroy(mrcp_engine_channel_t *channel);
+static apt_bool_t demo_recog_channel_open(mrcp_engine_channel_t *channel);
+static apt_bool_t demo_recog_channel_close(mrcp_engine_channel_t *channel);
+static apt_bool_t demo_recog_channel_request_process(mrcp_engine_channel_t *channel, mrcp_message_t *request);
+
+static const struct mrcp_engine_channel_method_vtable_t channel_vtable = {
+	demo_recog_channel_destroy,
+	demo_recog_channel_open,
+	demo_recog_channel_close,
+	demo_recog_channel_request_process
+};
+
+/** Declaration of recognizer audio stream methods */
+static apt_bool_t demo_recog_stream_destroy(mpf_audio_stream_t *stream);
+static apt_bool_t demo_recog_stream_open(mpf_audio_stream_t *stream);
+static apt_bool_t demo_recog_stream_close(mpf_audio_stream_t *stream);
+static apt_bool_t demo_recog_stream_write(mpf_audio_stream_t *stream, const mpf_frame_t *frame);
+
+static const mpf_audio_stream_vtable_t audio_stream_vtable = {
+	demo_recog_stream_destroy,
+	NULL,
+	NULL,
+	NULL,
+	demo_recog_stream_open,
+	demo_recog_stream_close,
+	demo_recog_stream_write
+};
+
+/** Declaration of demo recognizer engine */
+struct demo_recog_engine_t {
+	apt_consumer_task_t    *task;
+};
+
+/** Declaration of demo recognizer channel */
+struct demo_recog_channel_t {
+	/** Back pointer to engine */
+	demo_recog_engine_t     *demo_engine;
+	/** Engine channel base */
+	mrcp_engine_channel_t   *channel;
+
+	/** Active (in-progress) recognition request */
+	mrcp_message_t          *recog_request;
+	/** Pending stop response */
+	mrcp_message_t          *stop_response;
+	/** Indicates whether input timers are started */
+	apt_bool_t               timers_started;
+	/** Voice activity detector */
+	mpf_activity_detector_t *detector;
+	/** File to write utterance to */
+	FILE                    *audio_out;
+};
+
+typedef enum {
+	DEMO_RECOG_MSG_OPEN_CHANNEL,
+	DEMO_RECOG_MSG_CLOSE_CHANNEL,
+	DEMO_RECOG_MSG_REQUEST_PROCESS
+} demo_recog_msg_type_e;
+
+/** Declaration of demo recognizer task message */
+struct demo_recog_msg_t {
+	demo_recog_msg_type_e  type;
+	mrcp_engine_channel_t *channel; 
+	mrcp_message_t        *request;
+};
+
+static apt_bool_t demo_recog_msg_signal(demo_recog_msg_type_e type, mrcp_engine_channel_t *channel, mrcp_message_t *request);
+static apt_bool_t demo_recog_msg_process(apt_task_t *task, apt_task_msg_t *msg);
+
+/** Declare this macro to use log routine of the server, plugin is loaded from */
+MRCP_PLUGIN_LOGGER_IMPLEMENT
+
+/** Create demo recognizer engine */
+MRCP_PLUGIN_DECLARE(mrcp_resource_engine_t*) mrcp_plugin_create(apr_pool_t *pool)
+{
+	demo_recog_engine_t *demo_engine = apr_palloc(pool,sizeof(demo_recog_engine_t));
+	apt_task_t *task;
+	apt_task_vtable_t *vtable;
+	apt_task_msg_pool_t *msg_pool;
+
+	msg_pool = apt_task_msg_pool_create_dynamic(sizeof(demo_recog_msg_t),pool);
+	demo_engine->task = apt_consumer_task_create(demo_engine,msg_pool,pool);
+	if(!demo_engine->task) {
+		return NULL;
+	}
+	task = apt_consumer_task_base_get(demo_engine->task);
+	apt_task_name_set(task,RECOG_ENGINE_TASK_NAME);
+	vtable = apt_task_vtable_get(task);
+	if(vtable) {
+		vtable->process_msg = demo_recog_msg_process;
+	}
+
+	/* create resource engine base */
+	return mrcp_resource_engine_create(
+					MRCP_RECOGNIZER_RESOURCE,  /* MRCP resource identifier */
+					demo_engine,               /* object to associate */
+					&engine_vtable,            /* virtual methods table of resource engine */
+					pool);                     /* pool to allocate memory from */
+}
+
+/** Destroy recognizer engine */
+static apt_bool_t demo_recog_engine_destroy(mrcp_resource_engine_t *engine)
+{
+	demo_recog_engine_t *demo_engine = engine->obj;
+	if(demo_engine->task) {
+		apt_task_t *task = apt_consumer_task_base_get(demo_engine->task);
+		apt_task_destroy(task);
+		demo_engine->task = NULL;
+	}
+	return TRUE;
+}
+
+/** Open recognizer engine */
+static apt_bool_t demo_recog_engine_open(mrcp_resource_engine_t *engine)
+{
+	demo_recog_engine_t *demo_engine = engine->obj;
+	if(demo_engine->task) {
+		apt_task_t *task = apt_consumer_task_base_get(demo_engine->task);
+		apt_task_start(task);
+	}
+	return TRUE;
+}
+
+/** Close recognizer engine */
+static apt_bool_t demo_recog_engine_close(mrcp_resource_engine_t *engine)
+{
+	demo_recog_engine_t *demo_engine = engine->obj;
+	if(demo_engine->task) {
+		apt_task_t *task = apt_consumer_task_base_get(demo_engine->task);
+		apt_task_terminate(task,TRUE);
+	}
+	return TRUE;
+}
+
+static mrcp_engine_channel_t* demo_recog_engine_channel_create(mrcp_resource_engine_t *engine, apr_pool_t *pool)
+{
+	/* create demo recog channel */
+	demo_recog_channel_t *recog_channel = apr_palloc(pool,sizeof(demo_recog_channel_t));
+	recog_channel->demo_engine = engine->obj;
+	recog_channel->recog_request = NULL;
+	recog_channel->stop_response = NULL;
+	recog_channel->detector = mpf_activity_detector_create(pool);
+	recog_channel->audio_out = NULL;
+	/* create engine channel base */
+	recog_channel->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 */
+			recog_channel,        /* object to associate */
+			NULL,                 /* codec descriptor might be NULL by default */
+			pool);                /* pool to allocate memory from */
+	return recog_channel->channel;
+}
+
+/** Destroy engine channel */
+static apt_bool_t demo_recog_channel_destroy(mrcp_engine_channel_t *channel)
+{
+	demo_recog_channel_t *recog_channel = channel->method_obj;
+	if(recog_channel->audio_out) {
+		fclose(recog_channel->audio_out);
+		recog_channel->audio_out = NULL;
+	}
+
+	return TRUE;
+}
+
+/** Open engine channel (asynchronous response MUST be sent)*/
+static apt_bool_t demo_recog_channel_open(mrcp_engine_channel_t *channel)
+{
+	return demo_recog_msg_signal(DEMO_RECOG_MSG_OPEN_CHANNEL,channel,NULL);
+}
+
+/** Close engine channel (asynchronous response MUST be sent)*/
+static apt_bool_t demo_recog_channel_close(mrcp_engine_channel_t *channel)
+{
+	return demo_recog_msg_signal(DEMO_RECOG_MSG_CLOSE_CHANNEL,channel,NULL);
+}
+
+/** Process MRCP channel request (asynchronous response MUST be sent)*/
+static apt_bool_t demo_recog_channel_request_process(mrcp_engine_channel_t *channel, mrcp_message_t *request)
+{
+	return demo_recog_msg_signal(DEMO_RECOG_MSG_REQUEST_PROCESS,channel,request);
+}
+
+/** Process RECOGNIZE request */
+static apt_bool_t demo_recog_channel_recognize(mrcp_engine_channel_t *channel, mrcp_message_t *request, mrcp_message_t *response)
+{
+	/* process RECOGNIZE request */
+	mrcp_recog_header_t *recog_header;
+	demo_recog_channel_t *recog_channel = channel->method_obj;
+	recog_channel->timers_started = TRUE;
+
+	/* get recognizer header */
+	recog_header = mrcp_resource_header_get(request);
+	if(recog_header) {
+		if(mrcp_resource_header_property_check(request,RECOGNIZER_HEADER_START_INPUT_TIMERS) == TRUE) {
+			recog_channel->timers_started = recog_header->start_input_timers;
+		}
+		if(mrcp_resource_header_property_check(request,RECOGNIZER_HEADER_NO_INPUT_TIMEOUT) == TRUE) {
+			mpf_activity_detector_noinput_timeout_set(recog_channel->detector,recog_header->no_input_timeout);
+		}
+		if(mrcp_resource_header_property_check(request,RECOGNIZER_HEADER_SPEECH_COMPLETE_TIMEOUT) == TRUE) {
+			mpf_activity_detector_complete_timeout_set(recog_channel->detector,recog_header->speech_complete_timeout);
+		}
+	}
+
+	if(!recog_channel->audio_out) {
+		const apt_dir_layout_t *dir_layout = channel->engine->dir_layout;
+		char *file_name = apr_pstrcat(channel->pool,"utter-",request->channel_id.session_id.buf,".pcm",NULL);
+		char *file_path = apt_datadir_filepath_get(dir_layout,file_name,channel->pool);
+		if(file_path) {
+			recog_channel->audio_out = fopen(file_path,"wb");
+		}
+	}
+
+	response->start_line.request_state = MRCP_REQUEST_STATE_INPROGRESS;
+	/* send asynchronous response */
+	mrcp_engine_channel_message_send(channel,response);
+	recog_channel->recog_request = request;
+	return TRUE;
+}
+
+/** Process STOP request */
+static apt_bool_t demo_recog_channel_stop(mrcp_engine_channel_t *channel, mrcp_message_t *request, mrcp_message_t *response)
+{
+	/* process STOP request */
+	demo_recog_channel_t *recog_channel = channel->method_obj;
+	/* store STOP request, make sure there is no more activity and only then send the response */
+	recog_channel->stop_response = response;
+	return TRUE;
+}
+
+/** Process START-INPUT-TIMERS request */
+static apt_bool_t demo_recog_channel_timers_start(mrcp_engine_channel_t *channel, mrcp_message_t *request, mrcp_message_t *response)
+{
+	demo_recog_channel_t *recog_channel = channel->method_obj;
+	recog_channel->timers_started = TRUE;
+	return mrcp_engine_channel_message_send(channel,response);
+}
+
+/** Dispatch MRCP request */
+static apt_bool_t demo_recog_channel_request_dispatch(mrcp_engine_channel_t *channel, mrcp_message_t *request)
+{
+	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 = demo_recog_channel_recognize(channel,request,response);
+			break;
+		case RECOGNIZER_GET_RESULT:
+			break;
+		case RECOGNIZER_START_INPUT_TIMERS:
+			processed = demo_recog_channel_timers_start(channel,request,response);
+			break;
+		case RECOGNIZER_STOP:
+			processed = demo_recog_channel_stop(channel,request,response);
+			break;
+		default:
+			break;
+	}
+	if(processed == FALSE) {
+		/* send asynchronous response for not handled request */
+		mrcp_engine_channel_message_send(channel,response);
+	}
+	return TRUE;
+}
+
+/** Callback is called from MPF engine context to destroy any additional data associated with audio stream */
+static apt_bool_t demo_recog_stream_destroy(mpf_audio_stream_t *stream)
+{
+	return TRUE;
+}
+
+/** Callback is called from MPF engine context to perform any action before open */
+static apt_bool_t demo_recog_stream_open(mpf_audio_stream_t *stream)
+{
+	return TRUE;
+}
+
+/** Callback is called from MPF engine context to perform any action after close */
+static apt_bool_t demo_recog_stream_close(mpf_audio_stream_t *stream)
+{
+	return TRUE;
+}
+
+/* Raise demo START-OF-INPUT event */
+static apt_bool_t demo_recog_start_of_input(demo_recog_channel_t *recog_channel)
+{
+	/* create START-OF-INPUT event */
+	mrcp_message_t *message = mrcp_event_create(
+						recog_channel->recog_request,
+						RECOGNIZER_START_OF_INPUT,
+						recog_channel->recog_request->pool);
+	if(!message) {
+		return FALSE;
+	}
+
+	/* set request state */
+	message->start_line.request_state = MRCP_REQUEST_STATE_INPROGRESS;
+	/* send asynch event */
+	return mrcp_engine_channel_message_send(recog_channel->channel,message);
+}
+
+/* Load demo recognition result */
+static apt_bool_t demo_recog_result_load(demo_recog_channel_t *recog_channel, mrcp_message_t *message)
+{
+	FILE *file;
+	mrcp_engine_channel_t *channel = recog_channel->channel;
+	const apt_dir_layout_t *dir_layout = channel->engine->dir_layout;
+	char *file_path = apt_datadir_filepath_get(dir_layout,"result.xml",message->pool);
+	if(!file_path) {
+		return FALSE;
+	}
+	
+	/* read the demo result from file */
+	file = fopen(file_path,"r");
+	if(file) {
+		mrcp_generic_header_t *generic_header;
+		char text[1024];
+		apr_size_t size;
+		size = fread(text,1,sizeof(text),file);
+		apt_string_assign_n(&message->body,text,size,message->pool);
+		fclose(file);
+
+		/* get/allocate generic header */
+		generic_header = mrcp_generic_header_prepare(message);
+		if(generic_header) {
+			/* set content types */
+			apt_string_assign(&generic_header->content_type,"application/x-nlsml",message->pool);
+			mrcp_generic_header_property_add(message,GENERIC_HEADER_CONTENT_TYPE);
+		}
+	}
+	return TRUE;
+}
+
+/* Raise demo RECOGNITION-COMPLETE event */
+static apt_bool_t demo_recog_recognition_complete(demo_recog_channel_t *recog_channel, mrcp_recog_completion_cause_e cause)
+{
+	mrcp_recog_header_t *recog_header;
+	/* create RECOGNITION-COMPLETE event */
+	mrcp_message_t *message = mrcp_event_create(
+						recog_channel->recog_request,
+						RECOGNIZER_RECOGNITION_COMPLETE,
+						recog_channel->recog_request->pool);
+	if(!message) {
+		return FALSE;
+	}
+
+	/* get/allocate recognizer header */
+	recog_header = mrcp_resource_header_prepare(message);
+	if(recog_header) {
+		/* set completion cause */
+		recog_header->completion_cause = cause;
+		mrcp_resource_header_property_add(message,RECOGNIZER_HEADER_COMPLETION_CAUSE);
+	}
+	/* set request state */
+	message->start_line.request_state = MRCP_REQUEST_STATE_COMPLETE;
+
+	if(cause == RECOGNIZER_COMPLETION_CAUSE_SUCCESS) {
+		demo_recog_result_load(recog_channel,message);
+	}
+
+	recog_channel->recog_request = NULL;
+	/* send asynch event */
+	return mrcp_engine_channel_message_send(recog_channel->channel,message);
+}
+
+/** Callback is called from MPF engine context to write/send new frame */
+static apt_bool_t demo_recog_stream_write(mpf_audio_stream_t *stream, const mpf_frame_t *frame)
+{
+	demo_recog_channel_t *recog_channel = stream->obj;
+	if(recog_channel->stop_response) {
+		/* send asynchronous response to STOP request */
+		mrcp_engine_channel_message_send(recog_channel->channel,recog_channel->stop_response);
+		recog_channel->stop_response = NULL;
+		recog_channel->recog_request = NULL;
+		return TRUE;
+	}
+
+	if(recog_channel->recog_request) {
+		mpf_detector_event_e det_event = mpf_activity_detector_process(recog_channel->detector,frame);
+		switch(det_event) {
+			case MPF_DETECTOR_EVENT_ACTIVITY:
+				apt_log(APT_LOG_MARK,APT_PRIO_INFO,"Detected Voice Activity");
+				demo_recog_start_of_input(recog_channel);
+				break;
+			case MPF_DETECTOR_EVENT_INACTIVITY:
+				apt_log(APT_LOG_MARK,APT_PRIO_INFO,"Detected Voice Inactivity");
+				demo_recog_recognition_complete(recog_channel,RECOGNIZER_COMPLETION_CAUSE_SUCCESS);
+				break;
+			case MPF_DETECTOR_EVENT_NOINPUT:
+				apt_log(APT_LOG_MARK,APT_PRIO_INFO,"Detected Noinput");
+				if(recog_channel->timers_started == TRUE) {
+					demo_recog_recognition_complete(recog_channel,RECOGNIZER_COMPLETION_CAUSE_NO_INPUT_TIMEOUT);
+				}
+				break;
+			default:
+				break;
+		}
+
+		if(recog_channel->audio_out) {
+			fwrite(frame->codec_frame.buffer,1,frame->codec_frame.size,recog_channel->audio_out);
+		}
+	}
+	return TRUE;
+}
+
+static apt_bool_t demo_recog_msg_signal(demo_recog_msg_type_e type, mrcp_engine_channel_t *channel, mrcp_message_t *request)
+{
+	apt_bool_t status = FALSE;
+	demo_recog_channel_t *demo_channel = channel->method_obj;
+	demo_recog_engine_t *demo_engine = demo_channel->demo_engine;
+	apt_task_t *task = apt_consumer_task_base_get(demo_engine->task);
+	apt_task_msg_t *msg = apt_task_msg_get(task);
+	if(msg) {
+		demo_recog_msg_t *demo_msg;
+		msg->type = TASK_MSG_USER;
+		demo_msg = (demo_recog_msg_t*) msg->data;
+
+		demo_msg->type = type;
+		demo_msg->channel = channel;
+		demo_msg->request = request;
+		status = apt_task_msg_signal(task,msg);
+	}
+	return status;
+}
+
+static apt_bool_t demo_recog_msg_process(apt_task_t *task, apt_task_msg_t *msg)
+{
+	demo_recog_msg_t *demo_msg = (demo_recog_msg_t*)msg->data;
+	switch(demo_msg->type) {
+		case DEMO_RECOG_MSG_OPEN_CHANNEL:
+			/* open channel and send asynch response */
+			mrcp_engine_channel_open_respond(demo_msg->channel,TRUE);
+			break;
+		case DEMO_RECOG_MSG_CLOSE_CHANNEL:
+			/* close channel, make sure there is no activity and send asynch response */
+			mrcp_engine_channel_close_respond(demo_msg->channel);
+			break;
+		case DEMO_RECOG_MSG_REQUEST_PROCESS:
+			demo_recog_channel_request_dispatch(demo_msg->channel,demo_msg->request);
+			break;
+		default:
+			break;
+	}
+	return TRUE;
+}