mirror of
https://github.com/jambonz/freeswitch-modules.git
synced 2025-12-19 08:27:44 +00:00
224 lines
8.7 KiB
C
224 lines
8.7 KiB
C
/*
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*
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* mod_ibm_transcribe.c -- Freeswitch module for using ibm streaming transcribe api
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*
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*/
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#include "mod_ibm_transcribe.h"
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#include "ibm_transcribe_glue.h"
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/* Prototypes */
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SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_ibm_transcribe_shutdown);
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SWITCH_MODULE_LOAD_FUNCTION(mod_ibm_transcribe_load);
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SWITCH_MODULE_DEFINITION(mod_ibm_transcribe, mod_ibm_transcribe_load, mod_ibm_transcribe_shutdown, NULL);
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static switch_status_t do_stop(switch_core_session_t *session, char* bugname);
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static switch_bool_t capture_callback(switch_media_bug_t *bug, void *user_data, switch_abc_type_t type)
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{
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switch_core_session_t *session = switch_core_media_bug_get_session(bug);
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switch (type) {
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case SWITCH_ABC_TYPE_INIT:
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Got SWITCH_ABC_TYPE_INIT.\n");
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break;
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case SWITCH_ABC_TYPE_CLOSE:
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{
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private_t *tech_pvt = (private_t*) switch_core_media_bug_get_user_data(bug);
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Got SWITCH_ABC_TYPE_CLOSE.\n");
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ibm_transcribe_session_stop(session, 1, tech_pvt->bugname);
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Finished SWITCH_ABC_TYPE_CLOSE.\n");
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}
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break;
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case SWITCH_ABC_TYPE_READ:
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return ibm_transcribe_frame(session, bug);
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break;
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case SWITCH_ABC_TYPE_WRITE:
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default:
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break;
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}
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return SWITCH_TRUE;
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}
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static switch_status_t start_capture(switch_core_session_t *session, switch_media_bug_flag_t flags,
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char* lang, int interim, char* bugname)
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{
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switch_channel_t *channel = switch_core_session_get_channel(session);
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switch_media_bug_t *bug;
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switch_status_t status;
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switch_codec_implementation_t read_impl = { 0 };
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void *pUserData;
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uint32_t samples_per_second;
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if (switch_channel_get_private(channel, MY_BUG_NAME)) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "removing bug from previous transcribe\n");
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do_stop(session, bugname);
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}
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switch_core_session_get_read_impl(session, &read_impl);
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if (switch_channel_pre_answer(channel) != SWITCH_STATUS_SUCCESS) {
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return SWITCH_STATUS_FALSE;
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}
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samples_per_second = !strcasecmp(read_impl.iananame, "g722") ? read_impl.actual_samples_per_second : read_impl.samples_per_second;
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if (SWITCH_STATUS_FALSE == ibm_transcribe_session_init(session, samples_per_second, flags & SMBF_STEREO ? 2 : 1, lang, interim, bugname, &pUserData)) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error initializing ibm speech session.\n");
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return SWITCH_STATUS_FALSE;
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}
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if ((status = switch_core_media_bug_add(session, "ibm_transcribe", NULL, capture_callback, pUserData, 0, flags, &bug)) != SWITCH_STATUS_SUCCESS) {
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return status;
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}
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switch_channel_set_private(channel, MY_BUG_NAME, bug);
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "added media bug for ibm transcribe\n");
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t do_stop(switch_core_session_t *session, char* bugname)
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{
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switch_status_t status = SWITCH_STATUS_SUCCESS;
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switch_channel_t *channel = switch_core_session_get_channel(session);
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switch_media_bug_t *bug = switch_channel_get_private(channel, MY_BUG_NAME);
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if (bug) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Received user command command to stop transcribe.\n");
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status = ibm_transcribe_session_stop(session, 0, bugname);
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "stopped transcribe.\n");
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}
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return status;
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}
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#define TRANSCRIBE_API_SYNTAX "<uuid> [start|stop] lang-code [interim] [stereo|mono]"
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SWITCH_STANDARD_API(ibm_transcribe_function)
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{
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char *mycmd = NULL, *argv[6] = { 0 };
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int argc = 0;
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switch_status_t status = SWITCH_STATUS_FALSE;
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switch_media_bug_flag_t flags = SMBF_READ_STREAM /* | SMBF_WRITE_STREAM | SMBF_READ_PING */;
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if (!zstr(cmd) && (mycmd = strdup(cmd))) {
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argc = switch_separate_string(mycmd, ' ', argv, (sizeof(argv) / sizeof(argv[0])));
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}
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if (zstr(cmd) ||
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(!strcasecmp(argv[1], "stop") && argc < 2) ||
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(!strcasecmp(argv[1], "start") && argc < 3) ||
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zstr(argv[0])) {
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switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Error with command %s %s %s.\n", cmd, argv[0], argv[1]);
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stream->write_function(stream, "-USAGE: %s\n", TRANSCRIBE_API_SYNTAX);
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goto done;
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} else {
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switch_core_session_t *lsession = NULL;
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if ((lsession = switch_core_session_locate(argv[0]))) {
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if (!strcasecmp(argv[1], "stop")) {
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char *bugname = argc > 2 ? argv[2] : MY_BUG_NAME;
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switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "stop transcribing\n");
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status = do_stop(lsession, bugname);
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} else if (!strcasecmp(argv[1], "start")) {
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char* lang = argv[2];
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int interim = argc > 3 && !strcmp(argv[3], "interim");
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char *bugname = argc > 5 ? argv[5] : MY_BUG_NAME;
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if (argc > 4 && !strcmp(argv[4], "stereo")) {
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flags |= SMBF_WRITE_STREAM ;
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flags |= SMBF_STEREO;
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}
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switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "start transcribing %s %s\n", lang, interim ? "interim": "complete");
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status = start_capture(lsession, flags, lang, interim, bugname);
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}
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switch_core_session_rwunlock(lsession);
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}
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}
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if (status == SWITCH_STATUS_SUCCESS) {
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stream->write_function(stream, "+OK Success\n");
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} else {
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stream->write_function(stream, "-ERR Operation Failed\n");
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}
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done:
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switch_safe_free(mycmd);
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return SWITCH_STATUS_SUCCESS;
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}
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SWITCH_MODULE_LOAD_FUNCTION(mod_ibm_transcribe_load)
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{
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switch_api_interface_t *api_interface;
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/* create/register custom event message type */
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if (switch_event_reserve_subclass(TRANSCRIBE_EVENT_RESULTS) != SWITCH_STATUS_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't register subclass %s!\n", TRANSCRIBE_EVENT_RESULTS);
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return SWITCH_STATUS_TERM;
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}
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if (switch_event_reserve_subclass(TRANSCRIBE_EVENT_NO_AUDIO_DETECTED) != SWITCH_STATUS_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't register subclass %s!\n", TRANSCRIBE_EVENT_NO_AUDIO_DETECTED);
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return SWITCH_STATUS_TERM;
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}
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if (switch_event_reserve_subclass(TRANSCRIBE_EVENT_VAD_DETECTED) != SWITCH_STATUS_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't register subclass %s!\n", TRANSCRIBE_EVENT_VAD_DETECTED);
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return SWITCH_STATUS_TERM;
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}
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if (switch_event_reserve_subclass(TRANSCRIBE_EVENT_CONNECT_SUCCESS) != SWITCH_STATUS_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't register subclass %s!\n", TRANSCRIBE_EVENT_CONNECT_SUCCESS);
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return SWITCH_STATUS_TERM;
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}
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if (switch_event_reserve_subclass(TRANSCRIBE_EVENT_CONNECT_FAIL) != SWITCH_STATUS_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't register subclass %s!\n", TRANSCRIBE_EVENT_CONNECT_FAIL);
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return SWITCH_STATUS_TERM;
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}
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if (switch_event_reserve_subclass(TRANSCRIBE_EVENT_BUFFER_OVERRUN) != SWITCH_STATUS_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't register subclass %s!\n", TRANSCRIBE_EVENT_BUFFER_OVERRUN);
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return SWITCH_STATUS_TERM;
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}
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if (switch_event_reserve_subclass(TRANSCRIBE_EVENT_DISCONNECT) != SWITCH_STATUS_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't register subclass %s!\n", TRANSCRIBE_EVENT_DISCONNECT);
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return SWITCH_STATUS_TERM;
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}
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/* connect my internal structure to the blank pointer passed to me */
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*module_interface = switch_loadable_module_create_module_interface(pool, modname);
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "IBM Speech Transcription API loading..\n");
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if (SWITCH_STATUS_FALSE == ibm_transcribe_init()) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Failed initializing ibm speech interface\n");
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}
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "IBM Speech Transcription API successfully loaded\n");
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SWITCH_ADD_API(api_interface, "uuid_ibm_transcribe", "IBM Speech Transcription API", ibm_transcribe_function, TRANSCRIBE_API_SYNTAX);
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switch_console_set_complete("add uuid_ibm_transcribe start lang-code [interim|final] [stereo|mono]");
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switch_console_set_complete("add uuid_ibm_transcribe stop ");
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/* indicate that the module should continue to be loaded */
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return SWITCH_STATUS_SUCCESS;
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}
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/*
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Called when the system shuts down
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Macro expands to: switch_status_t mod_ibm_transcribe_shutdown() */
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SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_ibm_transcribe_shutdown)
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{
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ibm_transcribe_cleanup();
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switch_event_free_subclass(TRANSCRIBE_EVENT_RESULTS);
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switch_event_free_subclass(TRANSCRIBE_EVENT_NO_AUDIO_DETECTED);
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switch_event_free_subclass(TRANSCRIBE_EVENT_VAD_DETECTED);
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switch_event_free_subclass(TRANSCRIBE_EVENT_CONNECT_SUCCESS);
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switch_event_free_subclass(TRANSCRIBE_EVENT_CONNECT_FAIL);
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switch_event_free_subclass(TRANSCRIBE_EVENT_BUFFER_OVERRUN);
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switch_event_free_subclass(TRANSCRIBE_EVENT_DISCONNECT);
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return SWITCH_STATUS_SUCCESS;
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}
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