990 lines
36 KiB
C
990 lines
36 KiB
C
/*
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* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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* Copyright (C) 2005/2006, Anthony Minessale II <anthmct@yahoo.com>
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*
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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*
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* The Initial Developer of the Original Code is
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* Anthony Minessale II <anthmct@yahoo.com>
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* Portions created by the Initial Developer are Copyright (C)
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Traun Leyden <tleyden@branchcut.com>
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* Arsen Chaloyan <achaloyan@yahoo.com>
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*
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* mod_openmrcp.c -- OpenMRCP Interface
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*
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* Module which acts as an MRCP client to an MRCP speech recognition
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* server. In other words it bridges freeswitch to an external speech
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* recognition system. Documentation on how to install and configure
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* the module is here: http://wiki.freeswitch.org/wiki/Mod_openmrcp
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*
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* Uses OpenMrcp (http://wiki.freeswitch.org/wiki/OpenMRCP) as the
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* the client library.
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*
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* TODO
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* =======
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*
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* - There are two memory pools in use. One in asr_session which is managed
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* by this module, and one in the switch_asr_handle_t, which is managed by freeswitch.
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* These need to be consolidated into one. (basically throw away the one in asr_session)
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*
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* - fs status codes (eg, SWITCH_STATUS_GENERR) and mrcp status codes (MRCP_STATUS_FAILURE)
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* are intermixed badly. this needs cleanup
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*
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* - openmrcp_flush_tts, openmrcp_text_param_tts, openmrcp_numeric_param_tts,
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* openmrcp_float_param_tts need to have functionality added
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*
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* - use a regex for extracting xml from raw result received from mrcp recognition
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* server
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*
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*/
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#ifdef __ICC
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#pragma warning (disable:188)
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#endif
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#include <switch.h>
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#include "openmrcp_client.h"
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#include "mrcp_client_context.h"
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#include "mrcp_recognizer.h"
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#include "mrcp_synthesizer.h"
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#include "mrcp_generic_header.h"
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SWITCH_MODULE_LOAD_FUNCTION(mod_openmrcp_load);
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SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_openmrcp_shutdown);
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SWITCH_MODULE_DEFINITION(mod_openmrcp, mod_openmrcp_load, mod_openmrcp_shutdown, NULL);
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typedef struct {
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char *name;
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openmrcp_client_options_t *mrcp_options;
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mrcp_client_t *mrcp_client;
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mrcp_client_context_t *mrcp_context;
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} openmrcp_profile_t;
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typedef struct {
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openmrcp_profile_t *profile;
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mrcp_session_t *client_session;
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mrcp_client_channel_t *control_channel;
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mrcp_audio_channel_t *audio_channel;
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mrcp_message_t *mrcp_message_last_rcvd;
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apr_pool_t *pool;
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switch_speech_flag_t flags;
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switch_mutex_t *flag_mutex;
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switch_thread_cond_t *wait_object;
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} openmrcp_session_t;
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typedef enum {
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FLAG_HAS_MESSAGE = (1 << 0),
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FLAG_FEED_STARTED = (1 << 1),
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FLAG_TERMINATING = (1 << 2)
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} mrcp_flag_t;
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typedef struct {
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switch_memory_pool_t *pool;
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switch_hash_t *profile_hash;
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char *asr_profile_name;
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char *tts_profile_name;
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//openmrcp_profile_t *asr_profile;
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//openmrcp_profile_t *tts_profile;
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} openmrcp_module_t;
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static openmrcp_module_t openmrcp_module;
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static switch_status_t openmrcp_profile_run(openmrcp_profile_t *profile);
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static openmrcp_session_t *openmrcp_session_create(openmrcp_profile_t *profile)
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{
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openmrcp_session_t *openmrcp_session;
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apr_pool_t *session_pool;
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if (!profile) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "no profile specified\n");
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return NULL;
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}
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if (apr_pool_create(&session_pool, NULL) != APR_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "failed to create session_pool\n");
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return NULL;
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}
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openmrcp_session = apr_palloc(session_pool, sizeof(openmrcp_session_t));
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openmrcp_session->pool = session_pool;
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openmrcp_session->profile = profile;
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openmrcp_session->client_session = NULL;
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openmrcp_session->control_channel = NULL;
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openmrcp_session->audio_channel = NULL;
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openmrcp_session->mrcp_message_last_rcvd = NULL;
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switch_mutex_init(&openmrcp_session->flag_mutex, SWITCH_MUTEX_NESTED, openmrcp_session->pool);
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if (switch_thread_cond_create(&openmrcp_session->wait_object, openmrcp_session->pool)) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "wait object creation failed\n");
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}
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openmrcp_session->client_session = mrcp_client_context_session_create(openmrcp_session->profile->mrcp_context, openmrcp_session);
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if (!openmrcp_session->client_session) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "session creation FAILED\n");
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apr_pool_destroy(session_pool);
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return NULL;
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}
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return openmrcp_session;
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}
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static void openmrcp_session_destroy(openmrcp_session_t *openmrcp_session)
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{
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if (openmrcp_session && openmrcp_session->pool) {
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mrcp_client_context_session_destroy(openmrcp_session->profile->mrcp_context, openmrcp_session->client_session);
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apr_pool_destroy(openmrcp_session->pool);
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}
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}
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static mrcp_status_t openmrcp_on_session_initiate(mrcp_client_context_t *context, mrcp_session_t *session)
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{
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "on_session_initiate called\n");
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return MRCP_STATUS_SUCCESS;
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}
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static mrcp_status_t openmrcp_on_session_terminate(mrcp_client_context_t *context, mrcp_session_t *session)
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{
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openmrcp_session_t *openmrcp_session = mrcp_client_context_session_object_get(session);
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "on_session_terminate called\n");
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if (!openmrcp_session) {
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return MRCP_STATUS_FAILURE;
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}
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if (switch_test_flag(openmrcp_session, FLAG_TERMINATING)) {
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openmrcp_session_destroy(openmrcp_session);
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} else {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "abnormal session terminate\n");
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}
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return MRCP_STATUS_SUCCESS;
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}
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static mrcp_status_t openmrcp_on_channel_add(mrcp_client_context_t *context, mrcp_session_t *session, mrcp_client_channel_t *control_channel,
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mrcp_audio_channel_t *audio_channel)
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{
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openmrcp_session_t *openmrcp_session = mrcp_client_context_session_object_get(session);
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "on_channel_add called\n");
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if (!openmrcp_session) {
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return MRCP_STATUS_FAILURE;
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}
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switch_mutex_lock(openmrcp_session->flag_mutex);
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openmrcp_session->control_channel = control_channel;
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openmrcp_session->audio_channel = audio_channel;
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switch_thread_cond_signal(openmrcp_session->wait_object);
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switch_mutex_unlock(openmrcp_session->flag_mutex);
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return MRCP_STATUS_SUCCESS;
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}
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static mrcp_status_t openmrcp_on_channel_remove(mrcp_client_context_t *context, mrcp_session_t *session, mrcp_client_channel_t *control_channel)
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{
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "on_channel_remove called\n");
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return MRCP_STATUS_SUCCESS;
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}
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/** this is called by the mrcp core whenever an mrcp message is received from
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the other side. */
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static mrcp_status_t openmrcp_on_channel_modify(mrcp_client_context_t *context, mrcp_session_t *session, mrcp_message_t *mrcp_message)
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{
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openmrcp_session_t *openmrcp_session = mrcp_client_context_session_object_get(session);
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "on_channel_modify called\n");
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if (!openmrcp_session) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "!openmrcp_session\n");
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return MRCP_STATUS_FAILURE;
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}
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if (!mrcp_message) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "!mrcp_message\n");
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return MRCP_STATUS_FAILURE;
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}
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if (mrcp_message->start_line.message_type == MRCP_MESSAGE_TYPE_RESPONSE && mrcp_message->start_line.request_state == MRCP_REQUEST_STATE_INPROGRESS) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "ignoring mrcp response\n");
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return MRCP_STATUS_SUCCESS;
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}
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if (switch_test_flag(openmrcp_session, FLAG_HAS_MESSAGE)) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "already has message\n");
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return MRCP_STATUS_SUCCESS;
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}
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "setting FLAG_HAS_MESSAGE\n");
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openmrcp_session->mrcp_message_last_rcvd = mrcp_message;
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switch_set_flag_locked(openmrcp_session, FLAG_HAS_MESSAGE);
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return MRCP_STATUS_SUCCESS;
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}
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/** Read in the grammar and construct an MRCP Recognize message that has
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The grammar attached as the payload */
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static mrcp_status_t openmrcp_recog_start(mrcp_client_context_t *context, openmrcp_session_t *asr_session, const char *path)
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{
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mrcp_generic_header_t *generic_header;
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apr_status_t rv;
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apr_file_t *fp;
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apr_pool_t *mp;
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apr_finfo_t finfo;
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char *buf1;
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apr_size_t bytes2read = 0;
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mrcp_recognizer_header_t *recognizer_header;
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mrcp_message_t *mrcp_message =
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mrcp_client_context_message_get(context, asr_session->client_session, asr_session->control_channel, RECOGNIZER_RECOGNIZE);
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if (!mrcp_message) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Could not create mrcp msg\n");
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return MRCP_STATUS_FAILURE;
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}
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/* open the file with the grammar and read into char* buffer */
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mp = mrcp_message->pool;
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if ((rv = apr_file_open(&fp, path, APR_READ, APR_OS_DEFAULT, mp)) != APR_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Could not read grammar\n");
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return -1;
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}
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rv = apr_file_info_get(&finfo, APR_FINFO_NORM, fp);
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buf1 = apr_palloc(mp, (apr_size_t) finfo.size + 1);
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bytes2read = (apr_size_t) finfo.size;
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rv = apr_file_read(fp, buf1, &bytes2read);
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buf1[bytes2read] = '\0';
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recognizer_header = mrcp_resource_header_prepare(mrcp_message);
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if (!recognizer_header) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Could not prepare resource_header\n");
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return MRCP_STATUS_FAILURE;
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}
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recognizer_header->cancel_if_queue = FALSE;
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mrcp_resource_header_property_add(mrcp_message,RECOGNIZER_HEADER_CANCEL_IF_QUEUE);
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generic_header = mrcp_generic_header_prepare(mrcp_message);
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if (!generic_header) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Could not prepare generic_header\n");
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return MRCP_STATUS_FAILURE;
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}
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generic_header->content_type = " application/srgs+xml";
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mrcp_generic_header_property_add(mrcp_message, GENERIC_HEADER_CONTENT_TYPE);
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generic_header->content_id = " <request1@form-level.store>";
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mrcp_generic_header_property_add(mrcp_message,GENERIC_HEADER_CONTENT_ID);
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mrcp_message->body = buf1;
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/* send the MRCP RECOGNIZE message to MRCP server */
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return mrcp_client_context_channel_modify(context, asr_session->client_session, mrcp_message);
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}
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/**
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* Freeswitch calls this from switch_ivr_detect_speech() and then adds a media
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* bug to tap into the channel's audio, which will result in all data getting
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* passed to asr_feed() and calls to asr_check_results() on each received frame.
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*
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* This code expects certain one-time initialization of the openmrcp client
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* engine/system to have already taken place.function to open the asr interface
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*/
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static switch_status_t openmrcp_asr_open(switch_asr_handle_t *ah, const char *codec, int rate, const char *dest, switch_asr_flag_t *flags)
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{
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openmrcp_session_t *asr_session;
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mrcp_client_channel_t *asr_channel;
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char *profile_name = openmrcp_module.asr_profile_name;
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openmrcp_profile_t *asr_profile = NULL;
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "asr_open called, codec: %s, rate: %d\n", codec, rate);
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if (strcmp(codec, "L16")) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Sorry, only L16 codec supported\n");
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return SWITCH_STATUS_GENERR;
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}
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if (rate != 8000) {
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// TODO: look into supporting other sample rates
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Sorry, only 8kz supported\n");
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return SWITCH_STATUS_GENERR;
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}
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if (!switch_strlen_zero(ah->param)) {
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profile_name = ah->param;
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}
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if (!(asr_profile = switch_core_hash_find(openmrcp_module.profile_hash, profile_name))) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Cannot locate profile %s\n", profile_name);
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return SWITCH_STATUS_GENERR;
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}
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/* create session */
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asr_session = openmrcp_session_create(asr_profile);
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if (!asr_session) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "asr_session creation FAILED\n");
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return SWITCH_STATUS_GENERR;
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}
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/* create recognizer channel, also starts outgoing rtp media */
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Create Recognizer Channel\n");
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asr_channel = mrcp_client_recognizer_channel_create(asr_session->profile->mrcp_context, asr_session->client_session, NULL);
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if (!asr_channel) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to create recognizer channel\n");
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return SWITCH_STATUS_FALSE;
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}
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switch_mutex_lock(asr_session->flag_mutex);
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mrcp_client_context_channel_add(asr_session->profile->mrcp_context, asr_session->client_session, asr_channel, NULL);
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if (switch_thread_cond_timedwait(asr_session->wait_object, asr_session->flag_mutex, 5000 * 1000) != APR_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "No response from client stack\n");
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}
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switch_mutex_unlock(asr_session->flag_mutex);
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if (!asr_session->control_channel) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "No recognizer channel available\n");
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return SWITCH_STATUS_FALSE;
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}
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asr_session->flags = *flags;
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ah->private_info = asr_session;
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return SWITCH_STATUS_SUCCESS;
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}
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/* function to load a grammar to the asr interface */
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static switch_status_t openmrcp_asr_load_grammar(switch_asr_handle_t *ah, const char *grammar, const char *path)
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{
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/** Read grammar from path and create and send and MRCP RECOGNIZE msg
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that has the grammar attached to body.
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TODO: - how does DEFINE-GRAMMAR fit into the picture here? (if at all)
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*/
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openmrcp_session_t *asr_session = (openmrcp_session_t *) ah->private_info;
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mrcp_client_context_t *context = asr_session->profile->mrcp_context;
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Loading grammar\n");
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Start Recognizer\n");
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openmrcp_recog_start(context, asr_session, path);
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Finished loading grammar\n");
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return SWITCH_STATUS_SUCCESS;
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}
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/**
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* function to feed audio to the ASR
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* asr_open and asr_feed appear to be called asynchronously -- in other
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* words asr_open is not completed yet, but asr_feed is already called
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* from another thread.
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*/
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static switch_status_t openmrcp_asr_feed(switch_asr_handle_t *ah, void *data, unsigned int len, switch_asr_flag_t *flags)
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{
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openmrcp_session_t *asr_session = (openmrcp_session_t *) ah->private_info;
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media_frame_t media_frame;
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audio_sink_t *audio_sink = mrcp_client_audio_sink_get(asr_session->audio_channel);
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media_frame.type = MEDIA_FRAME_TYPE_AUDIO;
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/* sampling rate and frame size should be retrieved from audio sink */
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media_frame.codec_frame.size = 160;
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media_frame.codec_frame.buffer = data;
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while (len >= media_frame.codec_frame.size) {
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if (!audio_sink) {
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/*!
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If there is no audio_sink established yet, discard the audio and
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return SUCCESS. returning anything other than success causes freeswitch
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to abort the call and tear down the channel. One reason there might
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not be an audio sink is that the openmrcp client lib is still in the startup
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process.
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*/
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "!audio_sink\n");
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
audio_sink->method_set->write_frame(audio_sink, &media_frame);
|
|
|
|
len -= (unsigned int) media_frame.codec_frame.size;
|
|
media_frame.codec_frame.buffer = (char *) media_frame.codec_frame.buffer + media_frame.codec_frame.size;
|
|
}
|
|
if (len > 0) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "None frame aligned data len [%d]\n", len);
|
|
}
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
static switch_status_t openmrcp_asr_pause(switch_asr_handle_t *ah)
|
|
{
|
|
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "openmrcp_asr_pause called\n");
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
|
|
}
|
|
|
|
static switch_status_t openmrcp_asr_resume(switch_asr_handle_t *ah)
|
|
{
|
|
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "openmrcp_asr_resume called\n");
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
/*! function to unload a grammar to the asr interface */
|
|
static switch_status_t openmrcp_asr_unload_grammar(switch_asr_handle_t *ah, const char *grammar)
|
|
{
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Freeswitch calls this whenever the channel is hungup or the
|
|
* speech detection is stopped via a call to switch_ivr_stop_detect_speech()
|
|
*/
|
|
static switch_status_t openmrcp_asr_close(switch_asr_handle_t *ah, switch_asr_flag_t *flags)
|
|
{
|
|
openmrcp_session_t *asr_session = (openmrcp_session_t *) ah->private_info;
|
|
mrcp_client_context_t *context = asr_session->profile->mrcp_context;
|
|
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "openmrcp_asr_close()\n");
|
|
|
|
// TODO!! should we do a switch_pool_clear(switch_memory_pool_t *p) on the pool held
|
|
// by asr_session?
|
|
|
|
// terminate client session
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Going to TERMINATE SESSION\n");
|
|
switch_set_flag_locked(asr_session, FLAG_TERMINATING);
|
|
mrcp_client_context_session_terminate(context, asr_session->client_session);
|
|
|
|
switch_set_flag(ah, SWITCH_ASR_FLAG_CLOSED);
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
* Freeswitch calls this method from the speech_thread() thread body method
|
|
* in switch_ivr_async.c every time a new frame is received by the media bug
|
|
* attached to the audio channel. If this method returns SWITCH_STATUS_SUCCESS,
|
|
* then Freeswitch will call openmrcp_asr_get_results() to get the result value.
|
|
*/
|
|
static switch_status_t openmrcp_asr_check_results(switch_asr_handle_t *ah, switch_asr_flag_t *flags)
|
|
{
|
|
openmrcp_session_t *asr_session = (openmrcp_session_t *) ah->private_info;
|
|
|
|
switch_status_t rv = (switch_test_flag(asr_session, FLAG_HAS_MESSAGE)) ? SWITCH_STATUS_SUCCESS : SWITCH_STATUS_FALSE;
|
|
|
|
return rv;
|
|
}
|
|
|
|
/*! This will be called after asr_check_results returns SUCCESS */
|
|
static switch_status_t openmrcp_asr_get_results(switch_asr_handle_t *ah, char **xmlstr, switch_asr_flag_t *flags)
|
|
{
|
|
openmrcp_session_t *asr_session = (openmrcp_session_t *) ah->private_info;
|
|
switch_status_t ret = SWITCH_STATUS_SUCCESS;
|
|
mrcp_message_t *message;
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "openmrcp_asr_get_results called\n");
|
|
|
|
message = asr_session->mrcp_message_last_rcvd;
|
|
asr_session->mrcp_message_last_rcvd = NULL;
|
|
// since we are returning our result here, future calls to check_results
|
|
// should return False
|
|
switch_clear_flag_locked(asr_session, FLAG_HAS_MESSAGE);
|
|
|
|
if (message->start_line.message_type == MRCP_MESSAGE_TYPE_RESPONSE) {
|
|
if (message->start_line.status_code != MRCP_STATUS_CODE_SUCCESS && message->start_line.status_code != MRCP_STATUS_CODE_SUCCESS_WITH_IGNORE) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "error code received [%d]\n", message->start_line.status_code);
|
|
ret = SWITCH_STATUS_FALSE;
|
|
}
|
|
} else if (message->start_line.message_type == MRCP_MESSAGE_TYPE_EVENT) {
|
|
if (message->start_line.method_id == RECOGNIZER_RECOGNITION_COMPLETE) {
|
|
/*!
|
|
we have to extract the XML but stripping off the <?xml version="1.0"?>
|
|
header. the body looks like:
|
|
|
|
Completion-Cause:001 no-match
|
|
Content-Type: application/nlsml+xml
|
|
Content-Length: 260
|
|
|
|
<?xml version="1.0"?>
|
|
<result xmlns="http://www.ietf.org/xml/ns/mrcpv2" xmlns:ex="http://www.example.com/example" score="100" grammar="session:request1@form-level.store">
|
|
<interpretation> <input mode="speech">open a</input>
|
|
</interpretation>
|
|
</result>
|
|
*/
|
|
|
|
if (message->body) {
|
|
char *marker = "?>"; // FIXME -- lame and brittle way of doing this. use regex or better.
|
|
char *position = strstr(message->body, marker);
|
|
if (!position) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Bad result received from mrcp server: %s", message->body);
|
|
ret = SWITCH_STATUS_FALSE;
|
|
} else {
|
|
position += strlen(marker);
|
|
*xmlstr = strdup(position);
|
|
}
|
|
} else {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "No result received from mrcp server\n");
|
|
ret = SWITCH_STATUS_FALSE;
|
|
}
|
|
|
|
ret = SWITCH_STATUS_SUCCESS;
|
|
} else if (message->start_line.method_id == RECOGNIZER_START_OF_INPUT) {
|
|
ret = SWITCH_STATUS_BREAK;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
static mrcp_status_t synth_speak(mrcp_client_context_t *context, openmrcp_session_t *tts_session, char *text)
|
|
{
|
|
mrcp_generic_header_t *generic_header;
|
|
mrcp_message_t *mrcp_message;
|
|
mrcp_status_t status = MRCP_STATUS_FAILURE;
|
|
|
|
char *text2speak;
|
|
const char v2_xml_head[] = "<?xml version=\"1.0\"?>\r\n" "<speak>\r\n" "<paragraph>\r\n" " <sentence><break time=\"1000ms\"/>";
|
|
|
|
const char v2_xml_tail[] = "<break time=\"1000ms\"/></sentence>\r\n" "</paragraph>\r\n" "</speak>\r\n";
|
|
|
|
const char v1_xml_head[] = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
|
|
"<speak version=\"1.0\" xmlns=\"http://www.w3.org/2001/10/synthesis\">\n<break time=\"1000ms\"/>";
|
|
|
|
|
|
const char v1_xml_tail[] = "<break time=\"1000ms\"/>\n</speak>\n";
|
|
|
|
const char *xml_head, *xml_tail;
|
|
|
|
if (tts_session->profile->mrcp_options->proto_version == 1) {
|
|
xml_head = v1_xml_head;
|
|
xml_tail = v1_xml_tail;
|
|
} else {
|
|
xml_head = v2_xml_head;
|
|
xml_tail = v2_xml_tail;
|
|
}
|
|
|
|
text2speak = switch_core_sprintf(tts_session->pool, "%s%s%s", xml_head, text, xml_tail);
|
|
mrcp_message = mrcp_client_context_message_get(context, tts_session->client_session, tts_session->control_channel, SYNTHESIZER_SPEAK);
|
|
|
|
if (!mrcp_message) {
|
|
goto end;
|
|
}
|
|
|
|
generic_header = mrcp_generic_header_prepare(mrcp_message);
|
|
if (!generic_header) {
|
|
goto end;
|
|
}
|
|
|
|
generic_header->content_type = "application/synthesis+ssml";
|
|
mrcp_generic_header_property_add(mrcp_message, GENERIC_HEADER_CONTENT_TYPE);
|
|
mrcp_message->body = text2speak;
|
|
|
|
status = mrcp_client_context_channel_modify(context, tts_session->client_session, mrcp_message);
|
|
|
|
end:
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
static mrcp_status_t synth_stop(mrcp_client_context_t *context, openmrcp_session_t *tts_session)
|
|
{
|
|
mrcp_message_t *mrcp_message = mrcp_client_context_message_get(context, tts_session->client_session, tts_session->control_channel, SYNTHESIZER_STOP);
|
|
if (!mrcp_message) {
|
|
return MRCP_STATUS_FAILURE;
|
|
}
|
|
|
|
return mrcp_client_context_channel_modify(context, tts_session->client_session, mrcp_message);
|
|
}
|
|
|
|
|
|
static switch_status_t openmrcp_tts_open(switch_speech_handle_t *sh, const char *voice_name, int rate, switch_speech_flag_t *flags)
|
|
{
|
|
openmrcp_session_t *tts_session;
|
|
mrcp_client_channel_t *tts_channel;
|
|
char *profile_name = openmrcp_module.tts_profile_name;
|
|
openmrcp_profile_t *tts_profile = NULL;
|
|
|
|
if (!switch_strlen_zero(sh->param)) {
|
|
profile_name = sh->param;
|
|
}
|
|
|
|
if (!(tts_profile = switch_core_hash_find(openmrcp_module.profile_hash, profile_name))) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Cannot locate profile %s\n", profile_name);
|
|
return SWITCH_STATUS_GENERR;
|
|
}
|
|
|
|
/* create session */
|
|
tts_session = openmrcp_session_create(tts_profile);
|
|
|
|
if (!tts_session) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "tts_session creation FAILED\n");
|
|
return SWITCH_STATUS_GENERR;
|
|
}
|
|
|
|
/* create synthesizer channel */
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Create Synthesizer Channel\n");
|
|
tts_channel = mrcp_client_synthesizer_channel_create(tts_session->profile->mrcp_context, tts_session->client_session, NULL);
|
|
if (!tts_channel) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to create synthesizer channel\n");
|
|
return SWITCH_STATUS_FALSE;
|
|
}
|
|
switch_mutex_lock(tts_session->flag_mutex);
|
|
mrcp_client_context_channel_add(tts_session->profile->mrcp_context, tts_session->client_session, tts_channel, NULL);
|
|
if (switch_thread_cond_timedwait(tts_session->wait_object, tts_session->flag_mutex, 5000 * 1000) != APR_SUCCESS) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "No response from client stack\n");
|
|
}
|
|
switch_mutex_unlock(tts_session->flag_mutex);
|
|
if (!tts_session->control_channel) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "No synthesizer channel available\n");
|
|
return SWITCH_STATUS_FALSE;
|
|
}
|
|
|
|
tts_session->flags = *flags;
|
|
sh->private_info = tts_session;
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t openmrcp_tts_close(switch_speech_handle_t *sh, switch_speech_flag_t *flags)
|
|
{
|
|
openmrcp_session_t *tts_session = (openmrcp_session_t *) sh->private_info;
|
|
mrcp_client_context_t *context = tts_session->profile->mrcp_context;
|
|
|
|
/* terminate tts session */
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "terminate tts_session\n");
|
|
switch_set_flag_locked(tts_session, FLAG_TERMINATING);
|
|
mrcp_client_context_session_terminate(context, tts_session->client_session);
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t openmrcp_feed_tts(switch_speech_handle_t *sh, char *text, switch_speech_flag_t *flags)
|
|
{
|
|
openmrcp_session_t *tts_session = (openmrcp_session_t *) sh->private_info;
|
|
mrcp_client_context_t *context = tts_session->profile->mrcp_context;
|
|
|
|
if (!tts_session->control_channel) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "no synthesizer channel too feed tts\n");
|
|
return SWITCH_STATUS_FALSE;
|
|
}
|
|
|
|
synth_speak(context, tts_session, text);
|
|
|
|
switch_clear_flag(tts_session, FLAG_FEED_STARTED);
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Freeswitch calls this when its ready to read datalen bytes of data.
|
|
*
|
|
* TODO: check the blocking flag passed in flags and act accordingly
|
|
* (see mod_cepstral.c)
|
|
*/
|
|
static switch_status_t openmrcp_read_tts(switch_speech_handle_t *sh, void *data, size_t *datalen, uint32_t *rate, switch_speech_flag_t *flags)
|
|
{
|
|
openmrcp_session_t *tts_session = (openmrcp_session_t *) sh->private_info;
|
|
size_t return_len = 0;
|
|
media_frame_t media_frame;
|
|
audio_source_t *audio_source;
|
|
|
|
if (switch_test_flag(tts_session, FLAG_HAS_MESSAGE)) {
|
|
mrcp_message_t *message = tts_session->mrcp_message_last_rcvd;
|
|
tts_session->mrcp_message_last_rcvd = NULL;
|
|
switch_clear_flag_locked(tts_session, FLAG_HAS_MESSAGE);
|
|
|
|
if (message->start_line.message_type == MRCP_MESSAGE_TYPE_RESPONSE) {
|
|
if (message->start_line.status_code != MRCP_STATUS_CODE_SUCCESS && message->start_line.status_code != MRCP_STATUS_CODE_SUCCESS_WITH_IGNORE) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "error code received [%d]\n", message->start_line.status_code);
|
|
return SWITCH_STATUS_BREAK;
|
|
}
|
|
} else if (message->start_line.message_type == MRCP_MESSAGE_TYPE_EVENT) {
|
|
if (message->start_line.method_id == SYNTHESIZER_SPEAK_COMPLETE) {
|
|
/* tell fs we are done */
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "FLAG_SPEAK_COMPLETE\n");
|
|
return SWITCH_STATUS_BREAK;
|
|
}
|
|
}
|
|
}
|
|
|
|
audio_source = mrcp_client_audio_source_get(tts_session->audio_channel);
|
|
if (!audio_source) {
|
|
return SWITCH_STATUS_BREAK;
|
|
}
|
|
|
|
if (!switch_test_flag(tts_session, FLAG_FEED_STARTED)) {
|
|
switch_set_flag(tts_session, FLAG_FEED_STARTED); // shouldn't this use set_flag_locked? -tl
|
|
if (audio_source->method_set->open) {
|
|
audio_source->method_set->open(audio_source);
|
|
}
|
|
}
|
|
|
|
/* sampling rate and frame size should be retrieved from audio source */
|
|
*rate = 8000;
|
|
media_frame.codec_frame.size = 160;
|
|
while (return_len < *datalen) {
|
|
media_frame.codec_frame.buffer = (char *) data + return_len;
|
|
audio_source->method_set->read_frame(audio_source, &media_frame);
|
|
if (media_frame.type != MEDIA_FRAME_TYPE_AUDIO) {
|
|
memset(media_frame.codec_frame.buffer, 0, media_frame.codec_frame.size);
|
|
}
|
|
return_len += media_frame.codec_frame.size;
|
|
}
|
|
*datalen = return_len;
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
static void openmrcp_flush_tts(switch_speech_handle_t *sh)
|
|
{
|
|
openmrcp_session_t *tts_session = (openmrcp_session_t *) sh->private_info;
|
|
mrcp_client_context_t *context = tts_session->profile->mrcp_context;
|
|
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "flush_tts called\n");
|
|
synth_stop(context, tts_session); // TODO
|
|
}
|
|
|
|
static void openmrcp_text_param_tts(switch_speech_handle_t *sh, char *param, const char *val)
|
|
{
|
|
|
|
}
|
|
|
|
static void openmrcp_numeric_param_tts(switch_speech_handle_t *sh, char *param, int val)
|
|
{
|
|
|
|
}
|
|
|
|
static void openmrcp_float_param_tts(switch_speech_handle_t *sh, char *param, double val)
|
|
{
|
|
|
|
}
|
|
|
|
|
|
static switch_status_t do_config()
|
|
{
|
|
char *cf = "openmrcp.conf";
|
|
switch_xml_t cfg, xml, settings, profiles, xprofile, param;
|
|
openmrcp_profile_t *mrcp_profile;
|
|
openmrcp_client_options_t *mrcp_options;
|
|
|
|
if (!(xml = switch_xml_open_cfg(cf, &cfg, NULL))) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "open of %s failed\n", cf);
|
|
return SWITCH_STATUS_TERM;
|
|
}
|
|
|
|
apt_log_priority_set(APT_PRIO_EMERGENCY);
|
|
if ((settings = switch_xml_child(cfg, "settings"))) {
|
|
for (param = switch_xml_child(settings, "param"); param; param = param->next) {
|
|
const char *var = switch_xml_attr_soft(param, "name");
|
|
const char *val = switch_xml_attr_soft(param, "value");
|
|
|
|
if (!strcasecmp(var, "asr_default_profile")) {
|
|
openmrcp_module.asr_profile_name = switch_core_strdup(openmrcp_module.pool, val);
|
|
} else if (!strcasecmp(var, "tts_default_profile")) {
|
|
openmrcp_module.tts_profile_name = switch_core_strdup(openmrcp_module.pool, val);
|
|
} else if (!strcasecmp(var, "log_level")) {
|
|
apt_log_priority_set(atoi(val));
|
|
}
|
|
}
|
|
} else {
|
|
goto error;
|
|
}
|
|
if ((profiles = switch_xml_child(cfg, "profiles"))) {
|
|
for (xprofile = switch_xml_child(profiles, "profile"); xprofile; xprofile = xprofile->next) {
|
|
const char *profile_name = switch_xml_attr_soft(xprofile, "name");
|
|
mrcp_profile = switch_core_alloc(openmrcp_module.pool, sizeof(openmrcp_profile_t));
|
|
mrcp_profile->mrcp_client = NULL;
|
|
mrcp_profile->mrcp_context = NULL;
|
|
mrcp_profile->name = "noname";
|
|
if (profile_name) {
|
|
mrcp_profile->name = switch_core_strdup(openmrcp_module.pool, profile_name);
|
|
}
|
|
|
|
mrcp_options = openmrcp_client_options_create(openmrcp_module.pool);
|
|
for (param = switch_xml_child(xprofile, "param"); param; param = param->next) {
|
|
const char *var = switch_xml_attr_soft(param, "name");
|
|
const char *val = switch_xml_attr_soft(param, "value");
|
|
|
|
if (!strcasecmp(var, "proto_version")) {
|
|
mrcp_options->proto_version = (mrcp_version_t) atoi(val);
|
|
} else if (!strcasecmp(var, "client_ip")) {
|
|
mrcp_options->client_ip = switch_core_strdup(openmrcp_module.pool, val);
|
|
} else if (!strcasecmp(var, "server_ip")) {
|
|
mrcp_options->server_ip = switch_core_strdup(openmrcp_module.pool, val);
|
|
} else if (!strcasecmp(var, "client_port")) {
|
|
mrcp_options->client_port = (apr_port_t) atoi(val);
|
|
} else if (!strcasecmp(var, "server_port")) {
|
|
mrcp_options->server_port = (apr_port_t) atoi(val);
|
|
} else if (!strcasecmp(var, "rtp_port_min")) {
|
|
mrcp_options->rtp_port_min = (apr_port_t) atoi(val);
|
|
} else if (!strcasecmp(var, "rtp_port_max")) {
|
|
mrcp_options->rtp_port_max = (apr_port_t) atoi(val);
|
|
}
|
|
}
|
|
mrcp_profile->mrcp_options = mrcp_options;
|
|
|
|
/* add profile */
|
|
if (!switch_core_hash_find(openmrcp_module.profile_hash, mrcp_profile->name)) {
|
|
if (openmrcp_profile_run(mrcp_profile) == SWITCH_STATUS_SUCCESS) {
|
|
switch_core_hash_insert(openmrcp_module.profile_hash, mrcp_profile->name, mrcp_profile);
|
|
}
|
|
} else {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "profile with the name [%s] already exists\n", mrcp_profile->name);
|
|
}
|
|
}
|
|
} else {
|
|
goto error;
|
|
}
|
|
|
|
switch_xml_free(xml);
|
|
return SWITCH_STATUS_SUCCESS;
|
|
|
|
error:
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to load module configuration\n");
|
|
switch_xml_free(xml);
|
|
return SWITCH_STATUS_TERM;
|
|
|
|
}
|
|
|
|
static switch_status_t openmrcp_profile_run(openmrcp_profile_t *profile)
|
|
{
|
|
mrcp_client_event_handler_t *mrcp_event_handler;
|
|
mrcp_client_t *mrcp_client;
|
|
mrcp_client_context_t *mrcp_context;
|
|
|
|
/*!
|
|
Perform one-time initialization of mrcp client library
|
|
*/
|
|
mrcp_event_handler = switch_core_alloc(openmrcp_module.pool, sizeof(mrcp_client_event_handler_t));
|
|
mrcp_event_handler->on_session_initiate = openmrcp_on_session_initiate;
|
|
mrcp_event_handler->on_session_terminate = openmrcp_on_session_terminate;
|
|
mrcp_event_handler->on_channel_add = openmrcp_on_channel_add;
|
|
mrcp_event_handler->on_channel_remove = openmrcp_on_channel_remove;
|
|
mrcp_event_handler->on_channel_modify = openmrcp_on_channel_modify;
|
|
|
|
// create client context, which must be passed to client engine
|
|
mrcp_context = mrcp_client_context_create(&openmrcp_module, mrcp_event_handler);
|
|
if (!mrcp_context) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "mrcp_client_context creation failed\n");
|
|
return SWITCH_STATUS_GENERR;
|
|
}
|
|
profile->mrcp_context = mrcp_context;
|
|
|
|
// this basically starts a thread that pulls events from the event queue
|
|
// and handles them
|
|
mrcp_client = openmrcp_client_start(profile->mrcp_options, mrcp_context);
|
|
if (!mrcp_client) {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "openmrcp_client_start FAILED\n");
|
|
mrcp_client_context_destroy(mrcp_context);
|
|
return SWITCH_STATUS_GENERR;
|
|
}
|
|
profile->mrcp_client = mrcp_client;
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
static switch_status_t openmrcp_init()
|
|
{
|
|
/* one-time mrcp global initialization */
|
|
if (apr_pool_create(&openmrcp_module.pool, NULL) != APR_SUCCESS) {
|
|
return SWITCH_STATUS_FALSE;
|
|
}
|
|
|
|
switch_core_hash_init(&openmrcp_module.profile_hash, openmrcp_module.pool);
|
|
|
|
/* read config */
|
|
if (do_config() != SWITCH_STATUS_SUCCESS) {
|
|
return SWITCH_STATUS_FALSE;
|
|
}
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t openmrcp_destroy()
|
|
{
|
|
/* one-time mrcp global destroy */
|
|
|
|
/* destroy asr/tts profiles */
|
|
switch_hash_index_t *hi;
|
|
void *val;
|
|
openmrcp_profile_t *mrcp_profile;
|
|
|
|
for (hi = switch_hash_first(NULL, openmrcp_module.profile_hash); hi; hi = switch_hash_next(hi)) {
|
|
switch_hash_this(hi, NULL, NULL, &val);
|
|
mrcp_profile = (openmrcp_profile_t *) val;
|
|
/* shutdown client engine */
|
|
openmrcp_client_shutdown(mrcp_profile->mrcp_client);
|
|
/* destroy client context */
|
|
mrcp_client_context_destroy(mrcp_profile->mrcp_context);
|
|
}
|
|
switch_core_hash_destroy(&openmrcp_module.profile_hash);
|
|
openmrcp_module.profile_hash = NULL;
|
|
|
|
apr_pool_destroy(openmrcp_module.pool);
|
|
openmrcp_module.pool = NULL;
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
SWITCH_MODULE_LOAD_FUNCTION(mod_openmrcp_load)
|
|
{
|
|
switch_speech_interface_t *speech_interface;
|
|
switch_asr_interface_t *asr_interface;
|
|
|
|
/* connect my internal structure to the blank pointer passed to me */
|
|
*module_interface = switch_loadable_module_create_module_interface(pool, modname);
|
|
speech_interface = switch_loadable_module_create_interface(*module_interface, SWITCH_SPEECH_INTERFACE);
|
|
speech_interface->interface_name = "openmrcp";
|
|
speech_interface->speech_open = openmrcp_tts_open;
|
|
speech_interface->speech_close = openmrcp_tts_close;
|
|
speech_interface->speech_feed_tts = openmrcp_feed_tts;
|
|
speech_interface->speech_read_tts = openmrcp_read_tts;
|
|
speech_interface->speech_flush_tts = openmrcp_flush_tts;
|
|
speech_interface->speech_text_param_tts = openmrcp_text_param_tts;
|
|
speech_interface->speech_numeric_param_tts = openmrcp_numeric_param_tts;
|
|
speech_interface->speech_float_param_tts = openmrcp_float_param_tts;
|
|
asr_interface = switch_loadable_module_create_interface(*module_interface, SWITCH_ASR_INTERFACE);
|
|
asr_interface->interface_name = "openmrcp";
|
|
asr_interface->asr_open = openmrcp_asr_open;
|
|
asr_interface->asr_load_grammar = openmrcp_asr_load_grammar;
|
|
asr_interface->asr_unload_grammar = openmrcp_asr_unload_grammar;
|
|
asr_interface->asr_close = openmrcp_asr_close;
|
|
asr_interface->asr_feed = openmrcp_asr_feed;
|
|
asr_interface->asr_resume = openmrcp_asr_resume;
|
|
asr_interface->asr_pause = openmrcp_asr_pause;
|
|
asr_interface->asr_check_results = openmrcp_asr_check_results;
|
|
asr_interface->asr_get_results = openmrcp_asr_get_results;
|
|
|
|
/* initialize openmrcp */
|
|
if (openmrcp_init() != SWITCH_STATUS_SUCCESS) {
|
|
return SWITCH_STATUS_FALSE;
|
|
}
|
|
|
|
/* indicate that the module should continue to be loaded */
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_openmrcp_shutdown)
|
|
{
|
|
/* destroy openmrcp */
|
|
openmrcp_destroy();
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* For Emacs:
|
|
* Local Variables:
|
|
* mode:c
|
|
* indent-tabs-mode:t
|
|
* tab-width:4
|
|
* c-basic-offset:4
|
|
* End:
|
|
* For VIM:
|
|
* vim:set softtabstop=4 shiftwidth=4 tabstop=4:
|
|
*/
|