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mod_unimrcp.c
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/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2009-2015, Anthony Minessale II <anthm@freeswitch.org>
*
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is FreeSWITCH mod_unimrcp
*
* The Initial Developer of the Original Code is
* Christopher M. Rienzo <chris@rienzo.com>
*
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Brian West <brian@freeswitch.org>
* Christopher M. Rienzo <chris@rienzo.com>
* Luke Dashjr <luke@openmethods.com> (OpenMethods, LLC)
*
* Maintainer: Christopher M. Rienzo <chris@rienzo.com>
*
* mod_unimrcp.c -- UniMRCP module (MRCP client)
*
*/
#include <switch.h>
/* UniMRCP includes */
#include "apt.h"
#include "apt_log.h"
#include "unimrcp_client.h"
#include "mrcp_application.h"
#include "mrcp_session.h"
#include "mrcp_message.h"
#include "mrcp_generic_header.h"
#include "mrcp_synth_header.h"
#include "mrcp_synth_resource.h"
#include "mrcp_recog_header.h"
#include "mrcp_recog_resource.h"
#include "uni_version.h"
#include "mrcp_resource_loader.h"
#include "mpf_engine.h"
#include "mpf_codec_manager.h"
#include "mpf_dtmf_generator.h"
#include "mpf_rtp_termination_factory.h"
#include "mrcp_sofiasip_client_agent.h"
#include "mrcp_unirtsp_client_agent.h"
#include "mrcp_client_connection.h"
#include "apt_net.h"
/*********************************************************************************************************************************************
* mod_unimrcp : module interface to FreeSWITCH
*/
/* module name */
#define MOD_UNIMRCP "unimrcp"
/* module config file */
#define CONFIG_FILE "unimrcp.conf"
/**
* A UniMRCP application.
*/
struct mod_unimrcp_application {
/** UniMRCP application */
mrcp_application_t *app;
/** MRCP callbacks from UniMRCP to this module's application */
mrcp_app_message_dispatcher_t dispatcher;
/** Audio callbacks from UniMRCP to this module's application */
mpf_audio_stream_vtable_t audio_stream_vtable;
/** maps FreeSWITCH param to MRCP param name */
switch_hash_t *fs_param_map;
/** maps MRCP header to unimrcp header handler function */
switch_hash_t *param_id_map;
};
typedef struct mod_unimrcp_application mod_unimrcp_application_t;
/**
* module globals - global configuration and variables
*/
struct mod_unimrcp_globals {
/** max-connection-count config */
char *unimrcp_max_connection_count;
/** request-timeout config */
char *unimrcp_request_timeout;
/** rx-buffer-size */
char *unimrcp_rx_buffer_size;
/** tx-buffer-size */
char *unimrcp_tx_buffer_size;
/** offer-new-connection config */
char *unimrcp_offer_new_connection;
/** default-tts-profile config */
char *unimrcp_default_synth_profile;
/** default-asr-profile config */
char *unimrcp_default_recog_profile;
/** log level for UniMRCP library */
char *unimrcp_log_level;
/** profile events configuration param */
char *enable_profile_events_param;
/** True if profile events are wanted */
int enable_profile_events;
/** the MRCP client stack */
mrcp_client_t *mrcp_client;
/** synthesizer application */
mod_unimrcp_application_t synth;
/** recognizer application */
mod_unimrcp_application_t recog;
/** synchronize access for speech channel numbering */
switch_mutex_t *mutex;
/** next available speech channel number */
int speech_channel_number;
/** the available profiles */
switch_hash_t *profiles;
/** UniMRCP and APT compatible memory pool */
apr_pool_t *apr_pool;
};
typedef struct mod_unimrcp_globals mod_unimrcp_globals_t;
/** Module global variables */
static mod_unimrcp_globals_t globals;
/**
* Profile-specific configuration. This allows us to handle differing MRCP server behavior
* on a per-profile basis
*/
struct profile {
/** name of the profile */
char *name;
/** MIME type to use for JSGF grammars */
const char *jsgf_mime_type;
/** MIME type to use for GSL grammars */
const char *gsl_mime_type;
/** MIME type to use for SRGS XML grammars */
const char *srgs_xml_mime_type;
/** MIME type to use for SRGS ABNF grammars */
const char *srgs_mime_type;
/** MIME type to use for Google Speech module context */
const char *xml_mime_type;
/** MIME type to use for SSML (TTS) */
const char *ssml_mime_type;
/** Default params to use for RECOGNIZE requests */
switch_hash_t *default_recog_params;
/** Default params to use for SPEAK requests */
switch_hash_t *default_synth_params;
};
typedef struct profile profile_t;
static switch_status_t profile_create(profile_t ** profile, const char *name, switch_memory_pool_t *pool);
/* Profile events that may be monitored. Useful for tracking MRCP profile utilization */
#define MY_EVENT_PROFILE_CREATE "unimrcp::profile_create"
#define MY_EVENT_PROFILE_OPEN "unimrcp::profile_open"
#define MY_EVENT_PROFILE_CLOSE "unimrcp::profile_close"
/**
* Defines XML parsing instructions
*/
static switch_xml_config_item_t instructions[] = {
SWITCH_CONFIG_ITEM_STRING_STRDUP("max-connection-count", CONFIG_REQUIRED, &globals.unimrcp_max_connection_count, "100", "",
"The max MRCPv2 connections to manage"),
SWITCH_CONFIG_ITEM_STRING_STRDUP("offer-new-connection", CONFIG_REQUIRED, &globals.unimrcp_offer_new_connection, "1", "", ""),
SWITCH_CONFIG_ITEM_STRING_STRDUP("default-tts-profile", CONFIG_REQUIRED, &globals.unimrcp_default_synth_profile, "default", "",
"The default profile to use for TTS"),
SWITCH_CONFIG_ITEM_STRING_STRDUP("default-asr-profile", CONFIG_REQUIRED, &globals.unimrcp_default_recog_profile, "default", "",
"The default profile to use for ASR"),
SWITCH_CONFIG_ITEM_STRING_STRDUP("log-level", CONFIG_REQUIRED, &globals.unimrcp_log_level, "WARNING",
"EMERGENCY|ALERT|CRITICAL|ERROR|WARNING|NOTICE|INFO|DEBUG", "Logging level for UniMRCP"),
SWITCH_CONFIG_ITEM_STRING_STRDUP("enable-profile-events", CONFIG_REQUIRED, &globals.enable_profile_events_param, "false", "",
"Fire profile events (true|false)"),
SWITCH_CONFIG_ITEM_STRING_STRDUP("request-timeout", CONFIG_REQUIRED, &globals.unimrcp_request_timeout, "10000", "",
"Maximum time to wait for server response to a request"),
SWITCH_CONFIG_ITEM_STRING_STRDUP("connection-rx-buffer-size", 0, &globals.unimrcp_rx_buffer_size, "1024", "",
"Maximum time to wait for server response to a request"),
SWITCH_CONFIG_ITEM_STRING_STRDUP("connection-tx-buffer-size", 0, &globals.unimrcp_tx_buffer_size, "1024", "",
"Maximum time to wait for server response to a request"),
SWITCH_CONFIG_ITEM_END()
};
/* mod_unimrcp interface to FreeSWITCH */
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_unimrcp_shutdown);
SWITCH_MODULE_RUNTIME_FUNCTION(mod_unimrcp_runtime);
SWITCH_MODULE_LOAD_FUNCTION(mod_unimrcp_load);
SWITCH_MODULE_DEFINITION(mod_unimrcp, mod_unimrcp_load, mod_unimrcp_shutdown, NULL);
static switch_status_t mod_unimrcp_do_config();
static mrcp_client_t *mod_unimrcp_client_create(switch_memory_pool_t *mod_pool);
static int process_rtp_config(mrcp_client_t *client, mpf_rtp_config_t *rtp_config, mpf_rtp_settings_t *rtp_settings, const char *param, const char *val, apr_pool_t *pool);
static int process_mrcpv1_config(rtsp_client_config_t *config, mrcp_sig_settings_t *sig_settings, const char *param, const char *val, apr_pool_t *pool);
static int process_mrcpv2_config(mrcp_sofia_client_config_t *config, mrcp_sig_settings_t *sig_settings, const char *param, const char *val, apr_pool_t *pool);
static int process_profile_config(profile_t *profile, const char *param, const char *val, switch_memory_pool_t *pool);
/* UniMRCP <--> FreeSWITCH logging bridge */
static apt_bool_t unimrcp_log(const char *file, int line, const char *obj, apt_log_priority_e priority, const char *format, va_list arg_ptr);
static apt_log_priority_e str_to_log_level(const char *level);
static int get_next_speech_channel_number(void);
#define XML_ID "<?xml"
#define SRGS_ID "<grammar"
#define SSML_ID "<speak"
#define GSL_ID ";GSL2.0"
#define ABNF_ID "#ABNF"
#define JSGF_ID "#JSGF"
#define GSR_ID "<speech-context"
#define BUILTIN_ID "builtin:"
#define SESSION_ID "session:"
#define HTTP_ID "http://"
#define HTTPS_ID "https://"
#define FILE_ID "file://"
#define INLINE_ID "inline:"
static int text_starts_with(const char *text, const char *match);
static const char *skip_initial_whitespace(const char *text);
/**
* UniMRCP parameter ID container
*/
struct unimrcp_param_id {
/** The parameter ID */
int id;
};
typedef struct unimrcp_param_id unimrcp_param_id_t;
static unimrcp_param_id_t *unimrcp_param_id_create(int id, switch_memory_pool_t *pool);
/********************************************************************************************************************************************
* AUDIO QUEUE : UniMRCP <--> FreeSWITCH audio buffering
*/
/* size of the buffer */
#define AUDIO_QUEUE_SIZE (1024 * 32)
/* Define to enable read/write logging and dumping of queue data to file */
#undef MOD_UNIMRCP_DEBUG_AUDIO_QUEUE
/**
* Audio queue internals
*/
struct audio_queue {
#ifdef MOD_UNIMRCP_DEBUG_AUDIO_QUEUE
/** debug file for tx operations */
switch_file_t *file_write;
/** debug file name */
char file_write_name[30];
/** debug file for rx operations */
switch_file_t *file_read;
/** debug file name */
char file_read_name[30];
#endif
/** the buffer of audio data */
switch_buffer_t *buffer;
/** synchronizes access to queue */
switch_mutex_t *mutex;
/** signaling for blocked readers/writers */
switch_thread_cond_t *cond;
/** total bytes written */
switch_size_t write_bytes;
/** total bytes read */
switch_size_t read_bytes;
/** number of bytes reader is waiting for */
switch_size_t waiting;
/** name of this queue (for logging) */
char *name;
/** optional session uuid associated with this queue (for logging) */
char *session_uuid;
};
typedef struct audio_queue audio_queue_t;
static switch_status_t audio_queue_create(audio_queue_t ** queue, const char *name, const char *session_uuid, switch_memory_pool_t *pool);
static switch_status_t audio_queue_write(audio_queue_t *queue, void *data, switch_size_t *data_len);
static switch_status_t audio_queue_read(audio_queue_t *queue, void *data, switch_size_t *data_len, int block);
static switch_status_t audio_queue_clear(audio_queue_t *queue);
static switch_status_t audio_queue_signal(audio_queue_t *queue);
static switch_status_t audio_queue_destroy(audio_queue_t *queue);
/*********************************************************************************************************************************************
* SPEECH_CHANNEL : speech functions common to recognizer and synthesizer
*/
#define SPEECH_CHANNEL_TIMEOUT_USEC (5000 * 1000)
#define AUDIO_TIMEOUT_USEC (SWITCH_MAX_INTERVAL * 1000)
/**
* Type of MRCP channel
*/
enum speech_channel_type {
SPEECH_CHANNEL_SYNTHESIZER,
SPEECH_CHANNEL_RECOGNIZER
};
typedef enum speech_channel_type speech_channel_type_t;
/**
* channel states
*/
enum speech_channel_state {
/** closed */
SPEECH_CHANNEL_CLOSED,
/** ready for speech request */
SPEECH_CHANNEL_READY,
/** processing speech request */
SPEECH_CHANNEL_PROCESSING,
/** finished processing speech request */
SPEECH_CHANNEL_DONE,
/** error opening channel */
SPEECH_CHANNEL_ERROR
};
typedef enum speech_channel_state speech_channel_state_t;
/**
* An MRCP speech channel
*/
struct speech_channel {
/** the name of this channel (for logging) */
char *name;
/** optional session associated w/ this channel */
char *session_uuid;
/** The profile used by this channel */
profile_t *profile;
/** type of channel */
speech_channel_type_t type;
/** application this channel is running */
mod_unimrcp_application_t *application;
/** UniMRCP session */
mrcp_session_t *unimrcp_session;
/** UniMRCP channel */
mrcp_channel_t *unimrcp_channel;
/** memory pool */
switch_memory_pool_t *memory_pool;
/** memory pool compatible with apt and unimrcp */
apr_pool_t *apr_pool;
/** synchronizes channel state */
switch_mutex_t *mutex;
/** wait on channel states */
switch_thread_cond_t *cond;
/** channel state */
speech_channel_state_t state;
/** UniMRCP <--> FreeSWITCH audio buffer */
audio_queue_t *audio_queue;
/** True, if channel was opened successfully */
int channel_opened;
/** rate */
uint16_t rate;
/** silence sample */
int silence;
/** speech channel params */
switch_hash_t *params;
/** app specific data */
void *data;
void *fsh;
};
typedef struct speech_channel speech_channel_t;
/* speech channel interface for UniMRCP */
static apt_bool_t speech_on_session_terminate(mrcp_application_t *application, mrcp_session_t *session, mrcp_sig_status_code_e status);
static apt_bool_t speech_on_channel_add(mrcp_application_t *application, mrcp_session_t *session, mrcp_channel_t *channel,
mrcp_sig_status_code_e status);
static apt_bool_t speech_on_channel_remove(mrcp_application_t *application, mrcp_session_t *session, mrcp_channel_t *channel,
mrcp_sig_status_code_e status);
/* speech_channel funcs */
static switch_status_t speech_channel_create(speech_channel_t ** schannel, const char *name, const char *session_uuid, speech_channel_type_t type, mod_unimrcp_application_t *app,
uint16_t rate, switch_memory_pool_t *pool);
static mpf_termination_t *speech_channel_create_mpf_termination(speech_channel_t *schannel);
static switch_status_t speech_channel_open(speech_channel_t *schannel, profile_t *profile);
static switch_status_t speech_channel_destroy(speech_channel_t *schannel);
static switch_status_t speech_channel_stop(speech_channel_t *schannel);
static switch_status_t speech_channel_set_param(speech_channel_t *schannel, const char *name, const char *val);
static switch_status_t speech_channel_write(speech_channel_t *schannel, void *data, switch_size_t *len);
static switch_status_t speech_channel_read(speech_channel_t *schannel, void *data, switch_size_t *len, int block);
static switch_status_t speech_channel_set_state(speech_channel_t *schannel, speech_channel_state_t state);
static switch_status_t speech_channel_set_state_unlocked(speech_channel_t *schannel, speech_channel_state_t state);
static const char *speech_channel_state_to_string(speech_channel_state_t state);
static const char *speech_channel_type_to_string(speech_channel_type_t type);
/*********************************************************************************************************************************************
* SYNTHESIZER : UniMRCP <--> FreeSWITCH tts interface
*/
/* synthesis languages */
#define MIME_TYPE_PLAIN_TEXT "text/plain"
static switch_status_t synth_load(switch_loadable_module_interface_t *module_interface, switch_memory_pool_t *pool);
static switch_status_t synth_shutdown();
/* synthesizer's interface for FreeSWITCH */
static switch_status_t synth_speech_open(switch_speech_handle_t *sh, const char *voice_name, int rate, int channels, switch_speech_flag_t *flags);
static switch_status_t synth_speech_close(switch_speech_handle_t *sh, switch_speech_flag_t *flags);
static switch_status_t synth_speech_feed_tts(switch_speech_handle_t *sh, char *text, switch_speech_flag_t *flags);
static switch_status_t synth_speech_read_tts(switch_speech_handle_t *sh, void *data, switch_size_t *datalen, switch_speech_flag_t *flags);
static void synth_speech_flush_tts(switch_speech_handle_t *sh);
static void synth_speech_text_param_tts(switch_speech_handle_t *sh, char *param, const char *val);
static void synth_speech_numeric_param_tts(switch_speech_handle_t *sh, char *param, int val);
static void synth_speech_float_param_tts(switch_speech_handle_t *sh, char *param, double val);
/* synthesizer's interface for UniMRCP */
static apt_bool_t synth_message_handler(const mrcp_app_message_t *app_message);
static apt_bool_t synth_on_message_receive(mrcp_application_t *application, mrcp_session_t *session, mrcp_channel_t *channel, mrcp_message_t *message);
static apt_bool_t synth_stream_write(mpf_audio_stream_t *stream, const mpf_frame_t *frame);
/* synthesizer specific speech_channel funcs */
static switch_status_t synth_channel_speak(speech_channel_t *schannel, const char *text);
static switch_status_t synth_channel_set_params(speech_channel_t *schannel, mrcp_message_t *msg, mrcp_generic_header_t *gen_hdr,
mrcp_synth_header_t *synth_hdr);
static switch_status_t synth_channel_set_header(speech_channel_t *schannel, int id, char *val, mrcp_message_t *msg, mrcp_synth_header_t *synth_hdr);
/*********************************************************************************************************************************************
* GRAMMAR : recognizer grammar management
*/
/**
* type of the grammar
*/
enum grammar_type {
GRAMMAR_TYPE_UNKNOWN,
/* text/uri-list */
GRAMMAR_TYPE_URI,
/* application/srgs */
GRAMMAR_TYPE_SRGS,
/* application/srgs+xml */
GRAMMAR_TYPE_SRGS_XML,
/* application/x-nuance-gsl */
GRAMMAR_TYPE_NUANCE_GSL,
/* application/x-jsgf */
GRAMMAR_TYPE_JSGF,
/* application/xml */
GRAMMAR_TYPE_XML
};
typedef enum grammar_type grammar_type_t;
/**
* A grammar for recognition
*/
struct grammar {
/** name of this grammar */
char *name;
/** grammar MIME type */
grammar_type_t type;
/** the grammar or its URI, depending on type */
char *data;
};
typedef struct grammar grammar_t;
static switch_status_t grammar_create(grammar_t ** grammar, const char *name, grammar_type_t type, const char *data, switch_memory_pool_t *pool);
static const char *grammar_type_to_mime(grammar_type_t type, profile_t *profile);
/*********************************************************************************************************************************************
* RECOGNIZER : UniMRCP <--> FreeSWITCH asr interface
*/
#define START_OF_INPUT_RECEIVED 1
#define START_OF_INPUT_REPORTED 2
/**
* Data specific to the recognizer
*/
struct recognizer_data {
/** the available grammars */
switch_hash_t *grammars;
/** the enabled grammars */
switch_hash_t *enabled_grammars;
/** recognize result */
char *result;
/** recognize result headers */
switch_event_t *result_headers;
/** true, if voice has started */
int start_of_input;
/** true, if input timers have started */
int timers_started;
/** UniMRCP mpf stream */
mpf_audio_stream_t *unimrcp_stream;
/** DTMF generator */
mpf_dtmf_generator_t *dtmf_generator;
/** true, if presently transmitting DTMF */
char dtmf_generator_active;
};
typedef struct recognizer_data recognizer_data_t;
static switch_status_t recog_load(switch_loadable_module_interface_t *module_interface, switch_memory_pool_t *pool);
static switch_status_t recog_shutdown();
/* recognizer's interface for FreeSWITCH */
static switch_status_t recog_asr_open(switch_asr_handle_t *ah, const char *codec, int rate, const char *dest, switch_asr_flag_t *flags);
static switch_status_t recog_asr_load_grammar(switch_asr_handle_t *ah, const char *grammar, const char *name);
static switch_status_t recog_asr_unload_grammar(switch_asr_handle_t *ah, const char *name);
static switch_status_t recog_asr_enable_grammar(switch_asr_handle_t *ah, const char *name);
static switch_status_t recog_asr_disable_grammar(switch_asr_handle_t *ah, const char *name);
static switch_status_t recog_asr_disable_all_grammars(switch_asr_handle_t *ah);
static switch_status_t recog_asr_close(switch_asr_handle_t *ah, switch_asr_flag_t *flags);
static switch_status_t recog_asr_feed(switch_asr_handle_t *ah, void *data, unsigned int len, switch_asr_flag_t *flags);
static switch_status_t recog_asr_feed_dtmf(switch_asr_handle_t *ah, const switch_dtmf_t *dtmf, switch_asr_flag_t *flags);
static switch_status_t recog_asr_resume(switch_asr_handle_t *ah);
static switch_status_t recog_asr_pause(switch_asr_handle_t *ah);
static switch_status_t recog_asr_check_results(switch_asr_handle_t *ah, switch_asr_flag_t *flags);
static switch_status_t recog_asr_get_results(switch_asr_handle_t *ah, char **xmlstr, switch_asr_flag_t *flags);
static switch_status_t recog_asr_get_result_headers(switch_asr_handle_t *ah, switch_event_t **headers, switch_asr_flag_t *flags);
static switch_status_t recog_asr_start_input_timers(switch_asr_handle_t *ah);
static void recog_asr_text_param(switch_asr_handle_t *ah, char *param, const char *val);
static void recog_asr_numeric_param(switch_asr_handle_t *ah, char *param, int val);
static void recog_asr_float_param(switch_asr_handle_t *ah, char *param, double val);
/* recognizer's interface for UniMRCP */
static apt_bool_t recog_message_handler(const mrcp_app_message_t *app_message);
static apt_bool_t recog_on_message_receive(mrcp_application_t *application, mrcp_session_t *session, mrcp_channel_t *channel, mrcp_message_t *message);
static apt_bool_t recog_stream_open(mpf_audio_stream_t *stream, mpf_codec_t *codec);
static apt_bool_t recog_stream_read(mpf_audio_stream_t *stream, mpf_frame_t *frame);
/* recognizer specific speech_channel_funcs */
static switch_status_t recog_channel_start(speech_channel_t *schannel);
static switch_status_t recog_channel_load_grammar(speech_channel_t *schannel, const char *name, grammar_type_t type, const char *data);
static switch_status_t recog_channel_unload_grammar(speech_channel_t *schannel, const char *name);
static switch_status_t recog_channel_enable_grammar(speech_channel_t *schannel, const char *name);
static switch_status_t recog_channel_disable_grammar(speech_channel_t *schannel, const char *name);
static switch_status_t recog_channel_disable_all_grammars(speech_channel_t *schannel);
static switch_status_t recog_channel_check_results(speech_channel_t *schannel);
static switch_status_t recog_channel_set_start_of_input(speech_channel_t *schannel);
static switch_status_t recog_channel_start_input_timers(speech_channel_t *schannel);
static switch_status_t recog_channel_set_results(speech_channel_t *schannel, const char *results);
static switch_status_t recog_channel_set_result_headers(speech_channel_t *schannel, mrcp_recog_header_t *recog_hdr);
static switch_status_t recog_channel_get_results(speech_channel_t *schannel, char **results);
static switch_status_t recog_channel_get_result_headers(speech_channel_t *schannel, switch_event_t **result_headers);
static switch_status_t recog_channel_set_params(speech_channel_t *schannel, mrcp_message_t *msg, mrcp_generic_header_t *gen_hdr,
mrcp_recog_header_t *recog_hdr);
static switch_status_t recog_channel_set_header(speech_channel_t *schannel, int id, char *val, mrcp_message_t *msg, mrcp_recog_header_t *recog_hdr);
static switch_status_t recog_channel_set_timers_started(speech_channel_t *schannel);
/**
* Create a mod_unimrcp profile
* @param profile the created profile
* @param name the profile name
* @param pool the memory pool to use
* @return SWITCH_STATUS_SUCCESS if the profile is created
*/
static switch_status_t profile_create(profile_t ** profile, const char *name, switch_memory_pool_t *pool)
{
switch_status_t status = SWITCH_STATUS_SUCCESS;
profile_t *lprofile = NULL;
switch_event_t *event = NULL;
lprofile = (profile_t *) switch_core_alloc(pool, sizeof(profile_t));
if (lprofile) {
lprofile->name = switch_core_strdup(pool, name);
lprofile->srgs_mime_type = "application/srgs";
lprofile->srgs_xml_mime_type = "application/srgs+xml";
lprofile->gsl_mime_type = "application/x-nuance-gsl";
lprofile->jsgf_mime_type = "application/x-jsgf";
lprofile->ssml_mime_type = "application/ssml+xml";
lprofile->xml_mime_type = "application/xml";
switch_core_hash_init(&lprofile->default_synth_params);
switch_core_hash_init(&lprofile->default_recog_params);
*profile = lprofile;
if (globals.enable_profile_events && switch_event_create_subclass(&event, SWITCH_EVENT_CUSTOM, MY_EVENT_PROFILE_CREATE) == SWITCH_STATUS_SUCCESS) {
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "MRCP-Profile", lprofile->name);
switch_event_fire(&event);
}
} else {
*profile = NULL;
status = SWITCH_STATUS_FALSE;
}
return status;
}
/**
* Inspect text to determine if its first non-whitespace text matches "match"
* @param text the text to inspect.
* @param match the text to match
* @return true if matches
*/
static int text_starts_with(const char *text, const char *match)
{
int result = 0;
text = skip_initial_whitespace(text);
if (!zstr(text)) {
size_t textlen, matchlen;
textlen = strlen(text);
matchlen = strlen(match);
/* is there a match? */
result = textlen > matchlen && !strncmp(match, text, matchlen);
}
return result;
}
/**
* Find the first non-whitespace text character in text
* @param text the text to scan
* @return pointer to the first non-whitespace char in text or the empty string if none
*/
static const char *skip_initial_whitespace(const char *text)
{
if (!zstr(text)) {
while(switch_isspace(*text)) {
text++;
}
}
return text;
}
/**
* Create the audio queue
*
* @param audio_queue the created queue
* @param name the name of this queue (for logging)
* @param session_uuid optional session associated with this channel
* @param pool memory pool to allocate queue from
* @return SWITCH_STATUS_SUCCESS if successful. SWITCH_STATUS_FALSE if unable to allocate queue
*/
static switch_status_t audio_queue_create(audio_queue_t ** audio_queue, const char *name, const char *session_uuid, switch_memory_pool_t *pool)
{
switch_status_t status = SWITCH_STATUS_SUCCESS;
audio_queue_t *laudio_queue = NULL;
#ifdef MOD_UNIMRCP_DEBUG_AUDIO_QUEUE
int flags;
#endif
char *lname;
char *lsession_uuid = NULL;
*audio_queue = NULL;
lname = zstr(name) ? "" : switch_core_strdup(pool, name);
lsession_uuid = zstr(session_uuid) ? NULL : switch_core_strdup(pool, session_uuid);
if ((laudio_queue = (audio_queue_t *) switch_core_alloc(pool, sizeof(audio_queue_t))) == NULL) {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(lsession_uuid), SWITCH_LOG_ERROR, "(%s) unable to create audio queue\n", lname);
status = SWITCH_STATUS_FALSE;
goto done;
}
laudio_queue->name = lname;
laudio_queue->session_uuid = lsession_uuid;
if (switch_buffer_create(pool, &laudio_queue->buffer, AUDIO_QUEUE_SIZE) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(lsession_uuid), SWITCH_LOG_ERROR, "(%s) unable to create audio queue buffer\n", laudio_queue->name);
status = SWITCH_STATUS_FALSE;
goto done;
}
if (switch_mutex_init(&laudio_queue->mutex, SWITCH_MUTEX_UNNESTED, pool) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(lsession_uuid), SWITCH_LOG_ERROR, "(%s) unable to create audio queue mutex\n", laudio_queue->name);
status = SWITCH_STATUS_FALSE;
goto done;
}
if (switch_thread_cond_create(&laudio_queue->cond, pool) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(lsession_uuid), SWITCH_LOG_ERROR, "(%s) unable to create audio queue condition variable\n", laudio_queue->name);
status = SWITCH_STATUS_FALSE;
goto done;
}
#ifdef MOD_UNIMRCP_DEBUG_AUDIO_QUEUE
flags = SWITCH_FOPEN_CREATE | SWITCH_FOPEN_WRITE | SWITCH_FOPEN_TRUNCATE | SWITCH_FOPEN_BINARY;
strcpy(laudio_queue->file_read_name, "/tmp/mod_unimrcp_rx_XXXXXX");
if (switch_file_mktemp(&laudio_queue->file_read, laudio_queue->file_read_name, flags, pool) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(laudio_queue->session_uuid), SWITCH_LOG_ERROR, "(%s) unable to create audio queue read file\n", laudio_queue->name);
laudio_queue->file_read = NULL;
} else {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(laudio_queue->session_uuid), SWITCH_LOG_DEBUG, "(%s) queue rx saved to %s\n", laudio_queue->name, laudio_queue->file_read_name);
}
strcpy(laudio_queue->file_write_name, "/tmp/mod_unimrcp_tx_XXXXXX");
if (switch_file_mktemp(&laudio_queue->file_write, laudio_queue->file_write_name, flags, pool) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(laudio_queue->session_uuid), SWITCH_LOG_ERROR, "(%s) unable to create audio queue write file\n", laudio_queue->name);
laudio_queue->file_write = NULL;
} else {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(laudio_queue->session_uuid), SWITCH_LOG_DEBUG, "(%s) queue tx saved to %s\n", laudio_queue->name, laudio_queue->file_write_name);
}
#endif
laudio_queue->write_bytes = 0;
laudio_queue->read_bytes = 0;
laudio_queue->waiting = 0;
*audio_queue = laudio_queue;
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(laudio_queue->session_uuid), SWITCH_LOG_DEBUG, "(%s) audio queue created\n", laudio_queue->name);
done:
if (status != SWITCH_STATUS_SUCCESS) {
audio_queue_destroy(laudio_queue);
}
return status;
}
/**
* Write to the audio queue
*
* @param queue the queue to write to
* @param data the data to write
* @param data_len the number of octets to write
* @return SWITCH_STATUS_SUCCESS if data was written, SWITCH_STATUS_FALSE if data can't be written because queue is full
*/
static switch_status_t audio_queue_write(audio_queue_t *queue, void *data, switch_size_t *data_len)
{
switch_status_t status = SWITCH_STATUS_SUCCESS;
#ifdef MOD_UNIMRCP_DEBUG_AUDIO_QUEUE
switch_size_t len = *data_len;
#endif
switch_mutex_lock(queue->mutex);
#ifdef MOD_UNIMRCP_DEBUG_AUDIO_QUEUE
if (queue->file_write) {
switch_file_write(queue->file_write, data, &len);
}
#endif
if (switch_buffer_write(queue->buffer, data, *data_len) > 0) {
queue->write_bytes = queue->write_bytes + *data_len;
#ifdef MOD_UNIMRCP_DEBUG_AUDIO_QUEUE
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(queue->session_uuid), SWITCH_LOG_DEBUG, "(%s) audio queue write total = %ld\trequested = %ld\n", queue->name, queue->write_bytes,
*data_len);
#endif
if (queue->waiting <= switch_buffer_inuse(queue->buffer)) {
switch_thread_cond_signal(queue->cond);
}
} else {
*data_len = 0;
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(queue->session_uuid), SWITCH_LOG_DEBUG, "(%s) audio queue overflow!\n", queue->name);
status = SWITCH_STATUS_FALSE;
}
switch_mutex_unlock(queue->mutex);
return status;
}
/**
* Read from the audio queue
*
* @param queue the queue to read from
* @param data the read data
* @param data_len the amount of data requested / actual amount of data read (returned)
* @param block 1 if blocking is allowed
* @return SWITCH_STATUS_SUCCESS if successful. SWITCH_STATUS_FALSE if no data was requested, or there was a timeout while waiting to read
*/
static switch_status_t audio_queue_read(audio_queue_t *queue, void *data, switch_size_t *data_len, int block)
{
switch_size_t requested = *data_len;
switch_status_t status = SWITCH_STATUS_SUCCESS;
#ifdef MOD_UNIMRCP_DEBUG_AUDIO_QUEUE
switch_size_t len = *data_len;
#endif
switch_mutex_lock(queue->mutex);
/* allow the initial frame to buffer */
if (!queue->read_bytes && switch_buffer_inuse(queue->buffer) < requested) {
*data_len = 0;
status = SWITCH_STATUS_SUCCESS;
goto done;
}
/* wait for data, if allowed */
if (block) {
while (switch_buffer_inuse(queue->buffer) < requested) {
queue->waiting = requested;
if (switch_thread_cond_timedwait(queue->cond, queue->mutex, AUDIO_TIMEOUT_USEC) == SWITCH_STATUS_TIMEOUT) {
break;
}
}
queue->waiting = 0;
}
if (switch_buffer_inuse(queue->buffer) < requested) {
requested = switch_buffer_inuse(queue->buffer);
}
if (requested == 0) {
*data_len = 0;
status = SWITCH_STATUS_FALSE;
goto done;
}
/* read the data */
*data_len = switch_buffer_read(queue->buffer, data, requested);
queue->read_bytes = queue->read_bytes + *data_len;
#ifdef MOD_UNIMRCP_DEBUG_AUDIO_QUEUE
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(queue->session_uuid), SWITCH_LOG_DEBUG, "(%s) audio queue read total = %ld\tread = %ld\trequested = %ld\n", queue->name,
queue->read_bytes, *data_len, requested);
if (queue->file_read) {
switch_file_write(queue->file_read, data, &len);
}
#endif
done:
switch_mutex_unlock(queue->mutex);
return status;
}
/**
* Empty the queue
*
* @param queue the queue to empty
* @return SWITCH_STATUS_SUCCESS
*/
static switch_status_t audio_queue_clear(audio_queue_t *queue)
{
switch_mutex_lock(queue->mutex);
switch_buffer_zero(queue->buffer);
switch_thread_cond_signal(queue->cond);
switch_mutex_unlock(queue->mutex);
queue->read_bytes = 0;
queue->write_bytes = 0;
queue->waiting = 0;
return SWITCH_STATUS_SUCCESS;
}
/**
* Wake any threads waiting on this queue
*
* @param queue the queue to empty
* @return SWITCH_STATUS_SUCCESS
*/
static switch_status_t audio_queue_signal(audio_queue_t *queue)
{
switch_mutex_lock(queue->mutex);
switch_thread_cond_signal(queue->cond);
switch_mutex_unlock(queue->mutex);
return SWITCH_STATUS_SUCCESS;
}
/**
* Destroy the audio queue
*
* @param queue the queue to clean up
* @return SWITCH_STATUS_SUCCESS
*/
static switch_status_t audio_queue_destroy(audio_queue_t *queue)
{
if (queue) {
char *name = queue->name;
if (zstr(name)) {
name = "";
}
#ifdef MOD_UNIMRCP_DEBUG_AUDIO_QUEUE
if (queue->file_read) {
switch_file_close(queue->file_read);
queue->file_read = NULL;
}
if (queue->file_write) {
switch_file_close(queue->file_write);
queue->file_write = NULL;
}
#endif
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(queue->session_uuid), SWITCH_LOG_DEBUG, "(%s) audio queue destroyed\n", name);
}
return SWITCH_STATUS_SUCCESS;
}
/**
* Create a speech channel
*
* @param schannel the created channel
* @param name the name of the channel
* @param session_uuid optional session associated with this channel
* @param type the type of channel to create
* @param app the application
* @param rate the rate to use
* @param pool the memory pool to use
* @return SWITCH_STATUS_SUCCESS if successful. SWITCH_STATUS_FALSE if the channel cannot be allocated.
*/
static switch_status_t speech_channel_create(speech_channel_t ** schannel, const char *name, const char *session_uuid, speech_channel_type_t type, mod_unimrcp_application_t *app,
uint16_t rate, switch_memory_pool_t *pool)
{
switch_status_t status = SWITCH_STATUS_SUCCESS;
speech_channel_t *schan = NULL;
*schannel = NULL;
if ((schan = (speech_channel_t *) switch_core_alloc(pool, sizeof(speech_channel_t))) == NULL) {
status = SWITCH_STATUS_FALSE;
goto done;
}
schan->profile = NULL;
schan->type = type;
schan->application = app;
schan->state = SPEECH_CHANNEL_CLOSED;
schan->memory_pool = pool;
schan->apr_pool = NULL;
schan->params = NULL;
schan->rate = rate;
schan->silence = 0; /* L16 silence sample */
schan->channel_opened = 0;
apr_pool_create(&schan->apr_pool, NULL);
if (switch_mutex_init(&schan->mutex, SWITCH_MUTEX_UNNESTED, pool) != SWITCH_STATUS_SUCCESS ||
switch_thread_cond_create(&schan->cond, pool) != SWITCH_STATUS_SUCCESS ||
audio_queue_create(&schan->audio_queue, name, session_uuid, pool) != SWITCH_STATUS_SUCCESS) {
status = SWITCH_STATUS_FALSE;
goto done;
}
switch_core_hash_init(&schan->params);
schan->data = NULL;
schan->name = zstr(name) ? "" : switch_core_strdup(pool, name);
schan->session_uuid = zstr(session_uuid) ? NULL : switch_core_strdup(pool, session_uuid);
*schannel = schan;
done:
return status;
}
/**
* Destroy the speech channel
*
* @param schannel the channel to destroy
* @return SWITCH_STATUS_SUCCESS
*/
static switch_status_t speech_channel_destroy(speech_channel_t *schannel)
{
if (schannel) {
/* Terminate the MRCP session if not already done */
if (schannel->mutex) {
switch_mutex_lock(schannel->mutex);
if (schannel->state != SPEECH_CHANNEL_CLOSED) {
int warned = 0;
mrcp_application_session_terminate(schannel->unimrcp_session);
/* wait forever for session to terminate. Log WARNING if this starts taking too long */
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(schannel->session_uuid), SWITCH_LOG_DEBUG, "(%s) Waiting for MRCP session to terminate\n", schannel->name);
while (schannel->state != SPEECH_CHANNEL_CLOSED) {
if (switch_thread_cond_timedwait(schannel->cond, schannel->mutex, SPEECH_CHANNEL_TIMEOUT_USEC) == SWITCH_STATUS_TIMEOUT && !warned) {
warned = 1;
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(schannel->session_uuid), SWITCH_LOG_WARNING, "(%s) MRCP session has not terminated after %d ms\n", schannel->name, SPEECH_CHANNEL_TIMEOUT_USEC / (1000));
}
}
}
switch_mutex_unlock(schannel->mutex);
}
/* It is now safe to clean up the speech channel */
if (schannel->mutex) {
switch_mutex_lock(schannel->mutex);
}
audio_queue_destroy(schannel->audio_queue);
schannel->audio_queue = NULL;
if (schannel->params) {
switch_core_hash_destroy(&schannel->params);
}
if (schannel->mutex) {
switch_mutex_unlock(schannel->mutex);
}
if (schannel->apr_pool) {
apr_pool_destroy(schannel->apr_pool);
schannel->apr_pool = NULL;
}
}
return SWITCH_STATUS_SUCCESS;
}
/**
* Create the audio termination for the speech channel
* @param schannel the speech channel
* @return the termination or NULL
*/
static mpf_termination_t *speech_channel_create_mpf_termination(speech_channel_t *schannel)
{
mpf_termination_t *termination = NULL;
mpf_stream_capabilities_t *capabilities = NULL;
int sample_rates;
if (schannel->type == SPEECH_CHANNEL_SYNTHESIZER) {
capabilities = mpf_sink_stream_capabilities_create(schannel->unimrcp_session->pool);
} else {
capabilities = mpf_source_stream_capabilities_create(schannel->unimrcp_session->pool);
}
/* FreeSWITCH is capable of resampling so pick rates that are are multiples of the desired rate.
* UniMRCP should transcode whatever the MRCP server wants to use into LPCM (host-byte ordered L16) for us.
*/
if (schannel->rate == 16000) {
sample_rates = MPF_SAMPLE_RATE_8000 | MPF_SAMPLE_RATE_16000;
} else if (schannel->rate == 32000) {
sample_rates = MPF_SAMPLE_RATE_8000 | MPF_SAMPLE_RATE_16000 | MPF_SAMPLE_RATE_32000;
} else if (schannel->rate == 48000) {
sample_rates = MPF_SAMPLE_RATE_8000 | MPF_SAMPLE_RATE_16000 | MPF_SAMPLE_RATE_48000;
} else {
sample_rates = MPF_SAMPLE_RATE_8000;
}
mpf_codec_capabilities_add(&capabilities->codecs, sample_rates, "LPCM");
termination =
mrcp_application_audio_termination_create(schannel->unimrcp_session, &schannel->application->audio_stream_vtable, capabilities, schannel);
return termination;
}
/**
* Open the speech channel
*