From 9c8ab2d16506cdfd08b8c11d91ec0c5635f4577a Mon Sep 17 00:00:00 2001 From: kpfleming Date: Tue, 14 Feb 2006 18:44:18 +0000 Subject: set properties for new files (i need to get this documented) git-svn-id: http://svn.digium.com/svn/asterisk/trunk@9960 f38db490-d61c-443f-a65b-d21fe96a405b --- apps/app_amd.c | 824 ++++++++++++++++++++++++++++----------------------------- 1 file changed, 412 insertions(+), 412 deletions(-) (limited to 'apps/app_amd.c') diff --git a/apps/app_amd.c b/apps/app_amd.c index 8fc20c429..6ae81bd75 100644 --- a/apps/app_amd.c +++ b/apps/app_amd.c @@ -1,412 +1,412 @@ -/* - * Asterisk -- An open source telephony toolkit. - * - * Copyright (C) 2003 - 2006, Aheeva Technology. - * - * Claude Klimos (claude.klimos@aheeva.com) - * - * Disclaimed to Digium - * - * See http://www.asterisk.org for more information about - * the Asterisk project. Please do not directly contact - * any of the maintainers of this project for assistance; - * the project provides a web site, mailing lists and IRC - * channels for your use. - * - * This program is free software, distributed under the terms of - * the GNU General Public License Version 2. See the LICENSE file - * at the top of the source tree. - */ - -#include -#include - -#include "asterisk/module.h" -#include "asterisk/lock.h" -#include "asterisk/options.h" -#include "asterisk/channel.h" -#include "asterisk/dsp.h" -#include "asterisk/pbx.h" -#include "asterisk/config.h" -#include "asterisk/app.h" - - -static char *tdesc = "Answering Machine Detection Application"; -static char *app = "AMD"; -static char *synopsis = "Attempts to detect answering machines"; -static char *descrip = -" AMD([initialSilence][|greeting][|afterGreetingSilence][|totalAnalysisTime]\n" -" [|minimumWordLength][|betweenWordsSilence][|maximumNumberOfWords]\n" -" [|silenceThreshold])\n" -" This application attempts to detect answering machines at the beginning\n" -" of outbound calls. Simply call this application after the call\n" -" has been answered (outbound only, of course).\n" -" When loaded, AMD reads amd.conf and uses the parameters specified as\n" -" default values. Those default values get overwritten when calling AMD\n" -" with parameters.\n" -"- 'initialSilence' is the maximum silence duration before the greeting. If\n" -" exceeded then MACHINE.\n" -"- 'greeting' is the maximum length of a greeting. If exceeded then MACHINE.\n" -"- 'afterGreetingSilence' is the silence after detecting a greeting.\n" -" If exceeded then HUMAN.\n" -"- 'totalAnalysisTime' is the maximum time allowed for the algorithm to decide\n" -" on a HUMAN or MACHINE.\n" -"- 'minimumWordLength'is the minimum duration of Voice to considered as a word.\n" -"- 'betweenWordsSilence' is the minimum duration of silence after a word to \n" -" consider the audio that follows as a new word.\n" -"- 'maximumNumberOfWords'is the maximum number of words in the greeting. \n" -" If exceeded then MACHINE.\n" -"- 'silenceThreshold' is the silence threshold.\n" -"This application sets the following channel variable upon completion:\n" -" AMDSTATUS - This is the status of the answering machine detection.\n" -" Possible values are:\n" -" AMD_MACHINE | AMD_PERSON | AMD_NOTSURE | AMD_HANGUP\n" -" AMDCAUSE - Indicates the cause that led to the conclusion.\n" -" Possible values are:\n" -" AMD_TOOLONG-<%d total_time>\n" -" AMD_INITIALSILENCE-<%d silenceDuration>-<%d initialSilence>\n" -" AMD_HUMAN-<%d silenceDuration>-<%d afterGreetingSilence>\n" -" AMD_MAXWORDS-<%d wordsCount>-<%d maximumNumberOfWords>\n" -" AMD_LONGGREETING-<%d voiceDuration>-<%d greeting>\n"; - - -STANDARD_LOCAL_USER; - -LOCAL_USER_DECL; - -#define STATE_IN_WORD 1 -#define STATE_IN_SILENCE 2 - -/* Some default values for the algorithm parameters. These defaults will be overwritten from amd.conf */ -static int dfltInitialSilence = 2500; -static int dfltGreeting = 1500; -static int dfltAfterGreetingSilence = 800; -static int dfltTotalAnalysisTime = 5000; -static int dfltMinimumWordLength = 100; -static int dfltBetweenWordsSilence = 50; -static int dfltMaximumNumberOfWords = 3; -static int dfltSilenceThreshold = 256; - -static void isAnsweringMachine(struct ast_channel *chan, void *data) -{ - int res = 0; - - struct ast_frame *f = NULL; - - struct ast_dsp *silenceDetector; /* silence detector dsp */ - int dspsilence = 0; - int readFormat; - - int inInitialSilence = 1; - int inGreeting = 0; - int voiceDuration = 0; - int silenceDuration = 0; - int iTotalTime = 0; - int iWordsCount = 0; - int currentState = STATE_IN_SILENCE; - int previousState = STATE_IN_SILENCE; - int consecutiveVoiceDuration = 0; - char amdCause[256] = ""; - char amdStatus[256] = ""; - - /* Lets set the initial values of the variables that will control the algorithm. - The initial values are the default ones. If they are passed as arguments - when invoking the application, then the default values will be overwritten - by the ones passed as parameters. */ - int initialSilence = dfltInitialSilence; - int greeting = dfltGreeting; - int afterGreetingSilence = dfltAfterGreetingSilence; - int totalAnalysisTime = dfltTotalAnalysisTime; - int minimumWordLength = dfltMinimumWordLength; - int betweenWordsSilence = dfltBetweenWordsSilence; - int maximumNumberOfWords = dfltMaximumNumberOfWords; - int silenceThreshold = dfltSilenceThreshold; - - char *parse; - AST_DECLARE_APP_ARGS(args, - AST_APP_ARG(argInitialSilence); - AST_APP_ARG(argGreeting); - AST_APP_ARG(argAfterGreetingSilence); - AST_APP_ARG(argTotalAnalysisTime); - AST_APP_ARG(argMinimumWordLength); - AST_APP_ARG(argBetweenWordsSilence); - AST_APP_ARG(argMaximumNumberOfWords); - AST_APP_ARG(argSilenceThreshold); - ); - - ast_verbose(VERBOSE_PREFIX_3 "AMD: %s %s %s (Fmt: %d)\n", chan->name ,chan->cid.cid_ani, chan->cid.cid_rdnis, chan->readformat); - - /* Lets parse the arguments. */ - if (ast_strlen_zero(data)) { - ast_log(LOG_NOTICE, "AMD using the default parameters.\n"); - } else { - /* Some arguments have been passed. Lets parse them and overwrite the defaults. */ - if (!(parse = ast_strdupa(data))) { - ast_log(LOG_WARNING, "Memory allocation failure\n"); - pbx_builtin_setvar_helper(chan , "AMDSTATUS" , "" ); - pbx_builtin_setvar_helper(chan , "AMDCAUSE" , "" ); - return; - } - - AST_STANDARD_APP_ARGS(args, parse); - - if (!ast_strlen_zero(args.argInitialSilence)) { - initialSilence = atoi(args.argInitialSilence); - } - if (!ast_strlen_zero(args.argGreeting)) { - greeting = atoi(args.argGreeting); - } - if (!ast_strlen_zero(args.argAfterGreetingSilence)) { - afterGreetingSilence = atoi(args.argAfterGreetingSilence); - } - if (!ast_strlen_zero(args.argTotalAnalysisTime)) { - totalAnalysisTime = atoi(args.argTotalAnalysisTime); - } - if (!ast_strlen_zero(args.argMinimumWordLength)) { - minimumWordLength = atoi(args.argMinimumWordLength); - } - if (!ast_strlen_zero(args.argBetweenWordsSilence)) { - betweenWordsSilence = atoi(args.argBetweenWordsSilence); - } - if (!ast_strlen_zero(args.argMaximumNumberOfWords)) { - maximumNumberOfWords = atoi(args.argMaximumNumberOfWords); - } - if (!ast_strlen_zero(args.argSilenceThreshold)) { - silenceThreshold = atoi(args.argSilenceThreshold); - } - } - - /* Now we're ready to roll! */ - - ast_verbose(VERBOSE_PREFIX_3 "AMD: initialSilence [%d] greeting [%d] afterGreetingSilence [%d] " - "totalAnalysisTime [%d] minimumWordLength [%d] betweenWordsSilence [%d] maximumNumberOfWords [%d] silenceThreshold [%d] \n", - initialSilence, greeting, afterGreetingSilence, totalAnalysisTime, - minimumWordLength, betweenWordsSilence, maximumNumberOfWords, silenceThreshold ); - - readFormat = chan->readformat; - res = ast_set_read_format(chan, AST_FORMAT_SLINEAR); - if (res < 0 ) { - ast_log(LOG_WARNING, "AMD: Channel [%s]. Unable to set to linear mode, giving up\n", chan->name ); - pbx_builtin_setvar_helper(chan , "AMDSTATUS" , "" ); - pbx_builtin_setvar_helper(chan , "AMDCAUSE" , "" ); - return; - } - - silenceDetector = ast_dsp_new(); - if (!silenceDetector ) { - ast_log(LOG_WARNING, "AMD: Channel [%s]. Unable to create silence detector :(\n", chan->name ); - pbx_builtin_setvar_helper(chan , "AMDSTATUS" , "" ); - pbx_builtin_setvar_helper(chan , "AMDCAUSE" , "" ); - return; - } - ast_dsp_set_threshold(silenceDetector, silenceThreshold ); - - while (ast_waitfor(chan, -1) > -1) - { - f = ast_read(chan); - if (!f ) { - /* No Frame: Called Party Must Have Dropped */ - ast_verbose(VERBOSE_PREFIX_3 "AMD: HANGUP\n"); - ast_log(LOG_DEBUG, "Got hangup\n"); - strcpy(amdStatus , "AMD_HANGUP" ); - strcpy(amdCause , "" ); - break; - } - iTotalTime += 20; - if (iTotalTime >= totalAnalysisTime ) { - ast_verbose(VERBOSE_PREFIX_3 "AMD: Channel [%s]. Too long...\n", chan->name ); - ast_frfree(f); - strcpy(amdStatus , "AMD_NOTSURE" ); - sprintf(amdCause , "AMD_TOOLONG-%d", iTotalTime ); - break; - } - if (f->frametype == AST_FRAME_VOICE ) { - dspsilence = 0; - ast_dsp_silence(silenceDetector, f, &dspsilence); - if (dspsilence ) { - silenceDuration = dspsilence; - /* ast_verbose(VERBOSE_PREFIX_3 "AMD: %d SILENCE: silenceDuration:%d afterGreetingSilence:%d inGreeting:%d\n", currentState, silenceDuration, afterGreetingSilence, inGreeting ); */ - if (silenceDuration >= betweenWordsSilence ) { - if (currentState != STATE_IN_SILENCE ) { - previousState = currentState; - ast_verbose(VERBOSE_PREFIX_3 "AMD: Changed state to STATE_IN_SILENCE\n"); - } - currentState = STATE_IN_SILENCE; - consecutiveVoiceDuration = 0; - } - if (inInitialSilence == 1 && silenceDuration >= initialSilence ) { - ast_verbose(VERBOSE_PREFIX_3 "AMD: ANSWERING MACHINE: silenceDuration:%d initialSilence:%d\n", - silenceDuration, initialSilence ); - ast_frfree(f); - strcpy(amdStatus , "AMD_MACHINE" ); - sprintf(amdCause , "AMD_INITIALSILENCE-%d-%d", silenceDuration, initialSilence ); - break; - } - - if (silenceDuration >= afterGreetingSilence && inGreeting == 1 ) { - ast_verbose(VERBOSE_PREFIX_3 "AMD: HUMAN: silenceDuration:%d afterGreetingSilence:%d\n", - silenceDuration, afterGreetingSilence ); - ast_frfree(f); - strcpy(amdStatus , "AMD_PERSON" ); - sprintf(amdCause , "AMD_HUMAN-%d-%d", silenceDuration, afterGreetingSilence ); - break; - } - } else { - consecutiveVoiceDuration += 20; - voiceDuration += 20; - /* ast_verbose(VERBOSE_PREFIX_3 "AMD: %d VOICE: ConsecutiveVoice:%d voiceDuration:%d inGreeting:%d\n", currentState, consecutiveVoiceDuration, voiceDuration, inGreeting ); */ - - /* If I have enough consecutive voice to say that I am in a Word, I can only increment the - number of words if my previous state was Silence, which means that I moved into a word. */ - if (consecutiveVoiceDuration >= minimumWordLength ) { - if (currentState == STATE_IN_SILENCE ) { - iWordsCount++; - ast_verbose(VERBOSE_PREFIX_3 "AMD: Word detected. iWordsCount:%d\n", iWordsCount ); - previousState = currentState; - currentState = STATE_IN_WORD; - } - } - - if (iWordsCount >= maximumNumberOfWords ) { - ast_verbose(VERBOSE_PREFIX_3 "AMD: ANSWERING MACHINE: iWordsCount:%d\n", iWordsCount ); - ast_frfree(f); - strcpy(amdStatus , "AMD_MACHINE" ); - sprintf(amdCause , "AMD_MAXWORDS-%d-%d", iWordsCount, maximumNumberOfWords ); - break; - } - - if (inGreeting == 1 && voiceDuration >= greeting ) { - ast_verbose(VERBOSE_PREFIX_3 "AMD: ANSWERING MACHINE: voiceDuration:%d greeting:%d\n", - voiceDuration, greeting ); - ast_frfree(f); - strcpy(amdStatus , "AMD_MACHINE" ); - sprintf(amdCause , "AMD_LONGGREETING-%d-%d", voiceDuration, greeting ); - break; - } - if (voiceDuration >= minimumWordLength ) { - silenceDuration = 0; - inInitialSilence = 0; - inGreeting = 1; - } - } - } - ast_frfree(f); - } - - pbx_builtin_setvar_helper(chan , "AMDSTATUS" , amdStatus ); - pbx_builtin_setvar_helper(chan , "AMDCAUSE" , amdCause ); - - /* If We Started With A Valid Read Format, Return To It... */ - if (readFormat) { - res = ast_set_read_format(chan, readFormat ); - if (res) - ast_log(LOG_WARNING, "AMD: Unable to restore read format on '%s'\n", chan->name); - } - - /* Free The Silence Detector DSP */ - ast_dsp_free(silenceDetector ); - - return; -} - - -static int amd_exec(struct ast_channel *chan, void *data) -{ - struct localuser *u; - - LOCAL_USER_ADD(u); - isAnsweringMachine(chan, data); - LOCAL_USER_REMOVE(u); - - return 0; -} - -static void load_config(void) -{ - struct ast_config *cfg; - char *cat; - struct ast_variable *var; - - cfg = ast_config_load("amd.conf"); - - if (!cfg) { - ast_log(LOG_ERROR, "Configuration file amd.conf missing.\n"); - return; - } - - cat = ast_category_browse(cfg, NULL); - - while (cat) { - if (!strcasecmp(cat, "amd") ) { - var = ast_variable_browse(cfg, cat); - while (var) { - if (!strcasecmp(var->name, "initial_silence")) { - dfltInitialSilence = atoi(var->value); - } else if (!strcasecmp(var->name, "greeting")) { - dfltGreeting = atoi(var->value); - } else if (!strcasecmp(var->name, "after_greeting_silence")) { - dfltAfterGreetingSilence = atoi(var->value); - } else if (!strcasecmp(var->name, "silence_threshold")) { - dfltSilenceThreshold = atoi(var->value); - } else if (!strcasecmp(var->name, "total_analysis_time")) { - dfltTotalAnalysisTime = atoi(var->value); - } else if (!strcasecmp(var->name, "min_word_length")) { - dfltMinimumWordLength = atoi(var->value); - } else if (!strcasecmp(var->name, "between_words_silence")) { - dfltBetweenWordsSilence = atoi(var->value); - } else if (!strcasecmp(var->name, "maximum_number_of_words")) { - dfltMaximumNumberOfWords = atoi(var->value); - } else { - ast_log(LOG_WARNING, "%s: Cat:%s. Unknown keyword %s at line %d of amd.conf\n", - app, cat, var->name, var->lineno); - } - var = var->next; - } - } - cat = ast_category_browse(cfg, cat); - } - ast_config_destroy(cfg); - - ast_verbose(VERBOSE_PREFIX_3 "AMD defaults: initialSilence [%d] greeting [%d] afterGreetingSilence [%d] " - "totalAnalysisTime [%d] minimumWordLength [%d] betweenWordsSilence [%d] maximumNumberOfWords [%d] silenceThreshold [%d] \n", - dfltInitialSilence, dfltGreeting, dfltAfterGreetingSilence, dfltTotalAnalysisTime, - dfltMinimumWordLength, dfltBetweenWordsSilence, dfltMaximumNumberOfWords, dfltSilenceThreshold ); - - return; -} - -int unload_module(void) -{ - STANDARD_HANGUP_LOCALUSERS; - return ast_unregister_application(app); -} - -int load_module(void) -{ - load_config(); - return ast_register_application(app, amd_exec, synopsis, descrip); -} - -int reload(void) -{ - load_config(); - return 0; -} - -char *description(void) -{ - return tdesc; -} - -int usecount(void) -{ - int res; - STANDARD_USECOUNT(res); - return res; -} - -char *key() -{ - return ASTERISK_GPL_KEY; -} - +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 2003 - 2006, Aheeva Technology. + * + * Claude Klimos (claude.klimos@aheeva.com) + * + * Disclaimed to Digium + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + * This program is free software, distributed under the terms of + * the GNU General Public License Version 2. See the LICENSE file + * at the top of the source tree. + */ + +#include +#include + +#include "asterisk/module.h" +#include "asterisk/lock.h" +#include "asterisk/options.h" +#include "asterisk/channel.h" +#include "asterisk/dsp.h" +#include "asterisk/pbx.h" +#include "asterisk/config.h" +#include "asterisk/app.h" + + +static char *tdesc = "Answering Machine Detection Application"; +static char *app = "AMD"; +static char *synopsis = "Attempts to detect answering machines"; +static char *descrip = +" AMD([initialSilence][|greeting][|afterGreetingSilence][|totalAnalysisTime]\n" +" [|minimumWordLength][|betweenWordsSilence][|maximumNumberOfWords]\n" +" [|silenceThreshold])\n" +" This application attempts to detect answering machines at the beginning\n" +" of outbound calls. Simply call this application after the call\n" +" has been answered (outbound only, of course).\n" +" When loaded, AMD reads amd.conf and uses the parameters specified as\n" +" default values. Those default values get overwritten when calling AMD\n" +" with parameters.\n" +"- 'initialSilence' is the maximum silence duration before the greeting. If\n" +" exceeded then MACHINE.\n" +"- 'greeting' is the maximum length of a greeting. If exceeded then MACHINE.\n" +"- 'afterGreetingSilence' is the silence after detecting a greeting.\n" +" If exceeded then HUMAN.\n" +"- 'totalAnalysisTime' is the maximum time allowed for the algorithm to decide\n" +" on a HUMAN or MACHINE.\n" +"- 'minimumWordLength'is the minimum duration of Voice to considered as a word.\n" +"- 'betweenWordsSilence' is the minimum duration of silence after a word to \n" +" consider the audio that follows as a new word.\n" +"- 'maximumNumberOfWords'is the maximum number of words in the greeting. \n" +" If exceeded then MACHINE.\n" +"- 'silenceThreshold' is the silence threshold.\n" +"This application sets the following channel variable upon completion:\n" +" AMDSTATUS - This is the status of the answering machine detection.\n" +" Possible values are:\n" +" AMD_MACHINE | AMD_PERSON | AMD_NOTSURE | AMD_HANGUP\n" +" AMDCAUSE - Indicates the cause that led to the conclusion.\n" +" Possible values are:\n" +" AMD_TOOLONG-<%d total_time>\n" +" AMD_INITIALSILENCE-<%d silenceDuration>-<%d initialSilence>\n" +" AMD_HUMAN-<%d silenceDuration>-<%d afterGreetingSilence>\n" +" AMD_MAXWORDS-<%d wordsCount>-<%d maximumNumberOfWords>\n" +" AMD_LONGGREETING-<%d voiceDuration>-<%d greeting>\n"; + + +STANDARD_LOCAL_USER; + +LOCAL_USER_DECL; + +#define STATE_IN_WORD 1 +#define STATE_IN_SILENCE 2 + +/* Some default values for the algorithm parameters. These defaults will be overwritten from amd.conf */ +static int dfltInitialSilence = 2500; +static int dfltGreeting = 1500; +static int dfltAfterGreetingSilence = 800; +static int dfltTotalAnalysisTime = 5000; +static int dfltMinimumWordLength = 100; +static int dfltBetweenWordsSilence = 50; +static int dfltMaximumNumberOfWords = 3; +static int dfltSilenceThreshold = 256; + +static void isAnsweringMachine(struct ast_channel *chan, void *data) +{ + int res = 0; + + struct ast_frame *f = NULL; + + struct ast_dsp *silenceDetector; /* silence detector dsp */ + int dspsilence = 0; + int readFormat; + + int inInitialSilence = 1; + int inGreeting = 0; + int voiceDuration = 0; + int silenceDuration = 0; + int iTotalTime = 0; + int iWordsCount = 0; + int currentState = STATE_IN_SILENCE; + int previousState = STATE_IN_SILENCE; + int consecutiveVoiceDuration = 0; + char amdCause[256] = ""; + char amdStatus[256] = ""; + + /* Lets set the initial values of the variables that will control the algorithm. + The initial values are the default ones. If they are passed as arguments + when invoking the application, then the default values will be overwritten + by the ones passed as parameters. */ + int initialSilence = dfltInitialSilence; + int greeting = dfltGreeting; + int afterGreetingSilence = dfltAfterGreetingSilence; + int totalAnalysisTime = dfltTotalAnalysisTime; + int minimumWordLength = dfltMinimumWordLength; + int betweenWordsSilence = dfltBetweenWordsSilence; + int maximumNumberOfWords = dfltMaximumNumberOfWords; + int silenceThreshold = dfltSilenceThreshold; + + char *parse; + AST_DECLARE_APP_ARGS(args, + AST_APP_ARG(argInitialSilence); + AST_APP_ARG(argGreeting); + AST_APP_ARG(argAfterGreetingSilence); + AST_APP_ARG(argTotalAnalysisTime); + AST_APP_ARG(argMinimumWordLength); + AST_APP_ARG(argBetweenWordsSilence); + AST_APP_ARG(argMaximumNumberOfWords); + AST_APP_ARG(argSilenceThreshold); + ); + + ast_verbose(VERBOSE_PREFIX_3 "AMD: %s %s %s (Fmt: %d)\n", chan->name ,chan->cid.cid_ani, chan->cid.cid_rdnis, chan->readformat); + + /* Lets parse the arguments. */ + if (ast_strlen_zero(data)) { + ast_log(LOG_NOTICE, "AMD using the default parameters.\n"); + } else { + /* Some arguments have been passed. Lets parse them and overwrite the defaults. */ + if (!(parse = ast_strdupa(data))) { + ast_log(LOG_WARNING, "Memory allocation failure\n"); + pbx_builtin_setvar_helper(chan , "AMDSTATUS" , "" ); + pbx_builtin_setvar_helper(chan , "AMDCAUSE" , "" ); + return; + } + + AST_STANDARD_APP_ARGS(args, parse); + + if (!ast_strlen_zero(args.argInitialSilence)) { + initialSilence = atoi(args.argInitialSilence); + } + if (!ast_strlen_zero(args.argGreeting)) { + greeting = atoi(args.argGreeting); + } + if (!ast_strlen_zero(args.argAfterGreetingSilence)) { + afterGreetingSilence = atoi(args.argAfterGreetingSilence); + } + if (!ast_strlen_zero(args.argTotalAnalysisTime)) { + totalAnalysisTime = atoi(args.argTotalAnalysisTime); + } + if (!ast_strlen_zero(args.argMinimumWordLength)) { + minimumWordLength = atoi(args.argMinimumWordLength); + } + if (!ast_strlen_zero(args.argBetweenWordsSilence)) { + betweenWordsSilence = atoi(args.argBetweenWordsSilence); + } + if (!ast_strlen_zero(args.argMaximumNumberOfWords)) { + maximumNumberOfWords = atoi(args.argMaximumNumberOfWords); + } + if (!ast_strlen_zero(args.argSilenceThreshold)) { + silenceThreshold = atoi(args.argSilenceThreshold); + } + } + + /* Now we're ready to roll! */ + + ast_verbose(VERBOSE_PREFIX_3 "AMD: initialSilence [%d] greeting [%d] afterGreetingSilence [%d] " + "totalAnalysisTime [%d] minimumWordLength [%d] betweenWordsSilence [%d] maximumNumberOfWords [%d] silenceThreshold [%d] \n", + initialSilence, greeting, afterGreetingSilence, totalAnalysisTime, + minimumWordLength, betweenWordsSilence, maximumNumberOfWords, silenceThreshold ); + + readFormat = chan->readformat; + res = ast_set_read_format(chan, AST_FORMAT_SLINEAR); + if (res < 0 ) { + ast_log(LOG_WARNING, "AMD: Channel [%s]. Unable to set to linear mode, giving up\n", chan->name ); + pbx_builtin_setvar_helper(chan , "AMDSTATUS" , "" ); + pbx_builtin_setvar_helper(chan , "AMDCAUSE" , "" ); + return; + } + + silenceDetector = ast_dsp_new(); + if (!silenceDetector ) { + ast_log(LOG_WARNING, "AMD: Channel [%s]. Unable to create silence detector :(\n", chan->name ); + pbx_builtin_setvar_helper(chan , "AMDSTATUS" , "" ); + pbx_builtin_setvar_helper(chan , "AMDCAUSE" , "" ); + return; + } + ast_dsp_set_threshold(silenceDetector, silenceThreshold ); + + while (ast_waitfor(chan, -1) > -1) + { + f = ast_read(chan); + if (!f ) { + /* No Frame: Called Party Must Have Dropped */ + ast_verbose(VERBOSE_PREFIX_3 "AMD: HANGUP\n"); + ast_log(LOG_DEBUG, "Got hangup\n"); + strcpy(amdStatus , "AMD_HANGUP" ); + strcpy(amdCause , "" ); + break; + } + iTotalTime += 20; + if (iTotalTime >= totalAnalysisTime ) { + ast_verbose(VERBOSE_PREFIX_3 "AMD: Channel [%s]. Too long...\n", chan->name ); + ast_frfree(f); + strcpy(amdStatus , "AMD_NOTSURE" ); + sprintf(amdCause , "AMD_TOOLONG-%d", iTotalTime ); + break; + } + if (f->frametype == AST_FRAME_VOICE ) { + dspsilence = 0; + ast_dsp_silence(silenceDetector, f, &dspsilence); + if (dspsilence ) { + silenceDuration = dspsilence; + /* ast_verbose(VERBOSE_PREFIX_3 "AMD: %d SILENCE: silenceDuration:%d afterGreetingSilence:%d inGreeting:%d\n", currentState, silenceDuration, afterGreetingSilence, inGreeting ); */ + if (silenceDuration >= betweenWordsSilence ) { + if (currentState != STATE_IN_SILENCE ) { + previousState = currentState; + ast_verbose(VERBOSE_PREFIX_3 "AMD: Changed state to STATE_IN_SILENCE\n"); + } + currentState = STATE_IN_SILENCE; + consecutiveVoiceDuration = 0; + } + if (inInitialSilence == 1 && silenceDuration >= initialSilence ) { + ast_verbose(VERBOSE_PREFIX_3 "AMD: ANSWERING MACHINE: silenceDuration:%d initialSilence:%d\n", + silenceDuration, initialSilence ); + ast_frfree(f); + strcpy(amdStatus , "AMD_MACHINE" ); + sprintf(amdCause , "AMD_INITIALSILENCE-%d-%d", silenceDuration, initialSilence ); + break; + } + + if (silenceDuration >= afterGreetingSilence && inGreeting == 1 ) { + ast_verbose(VERBOSE_PREFIX_3 "AMD: HUMAN: silenceDuration:%d afterGreetingSilence:%d\n", + silenceDuration, afterGreetingSilence ); + ast_frfree(f); + strcpy(amdStatus , "AMD_PERSON" ); + sprintf(amdCause , "AMD_HUMAN-%d-%d", silenceDuration, afterGreetingSilence ); + break; + } + } else { + consecutiveVoiceDuration += 20; + voiceDuration += 20; + /* ast_verbose(VERBOSE_PREFIX_3 "AMD: %d VOICE: ConsecutiveVoice:%d voiceDuration:%d inGreeting:%d\n", currentState, consecutiveVoiceDuration, voiceDuration, inGreeting ); */ + + /* If I have enough consecutive voice to say that I am in a Word, I can only increment the + number of words if my previous state was Silence, which means that I moved into a word. */ + if (consecutiveVoiceDuration >= minimumWordLength ) { + if (currentState == STATE_IN_SILENCE ) { + iWordsCount++; + ast_verbose(VERBOSE_PREFIX_3 "AMD: Word detected. iWordsCount:%d\n", iWordsCount ); + previousState = currentState; + currentState = STATE_IN_WORD; + } + } + + if (iWordsCount >= maximumNumberOfWords ) { + ast_verbose(VERBOSE_PREFIX_3 "AMD: ANSWERING MACHINE: iWordsCount:%d\n", iWordsCount ); + ast_frfree(f); + strcpy(amdStatus , "AMD_MACHINE" ); + sprintf(amdCause , "AMD_MAXWORDS-%d-%d", iWordsCount, maximumNumberOfWords ); + break; + } + + if (inGreeting == 1 && voiceDuration >= greeting ) { + ast_verbose(VERBOSE_PREFIX_3 "AMD: ANSWERING MACHINE: voiceDuration:%d greeting:%d\n", + voiceDuration, greeting ); + ast_frfree(f); + strcpy(amdStatus , "AMD_MACHINE" ); + sprintf(amdCause , "AMD_LONGGREETING-%d-%d", voiceDuration, greeting ); + break; + } + if (voiceDuration >= minimumWordLength ) { + silenceDuration = 0; + inInitialSilence = 0; + inGreeting = 1; + } + } + } + ast_frfree(f); + } + + pbx_builtin_setvar_helper(chan , "AMDSTATUS" , amdStatus ); + pbx_builtin_setvar_helper(chan , "AMDCAUSE" , amdCause ); + + /* If We Started With A Valid Read Format, Return To It... */ + if (readFormat) { + res = ast_set_read_format(chan, readFormat ); + if (res) + ast_log(LOG_WARNING, "AMD: Unable to restore read format on '%s'\n", chan->name); + } + + /* Free The Silence Detector DSP */ + ast_dsp_free(silenceDetector ); + + return; +} + + +static int amd_exec(struct ast_channel *chan, void *data) +{ + struct localuser *u; + + LOCAL_USER_ADD(u); + isAnsweringMachine(chan, data); + LOCAL_USER_REMOVE(u); + + return 0; +} + +static void load_config(void) +{ + struct ast_config *cfg; + char *cat; + struct ast_variable *var; + + cfg = ast_config_load("amd.conf"); + + if (!cfg) { + ast_log(LOG_ERROR, "Configuration file amd.conf missing.\n"); + return; + } + + cat = ast_category_browse(cfg, NULL); + + while (cat) { + if (!strcasecmp(cat, "amd") ) { + var = ast_variable_browse(cfg, cat); + while (var) { + if (!strcasecmp(var->name, "initial_silence")) { + dfltInitialSilence = atoi(var->value); + } else if (!strcasecmp(var->name, "greeting")) { + dfltGreeting = atoi(var->value); + } else if (!strcasecmp(var->name, "after_greeting_silence")) { + dfltAfterGreetingSilence = atoi(var->value); + } else if (!strcasecmp(var->name, "silence_threshold")) { + dfltSilenceThreshold = atoi(var->value); + } else if (!strcasecmp(var->name, "total_analysis_time")) { + dfltTotalAnalysisTime = atoi(var->value); + } else if (!strcasecmp(var->name, "min_word_length")) { + dfltMinimumWordLength = atoi(var->value); + } else if (!strcasecmp(var->name, "between_words_silence")) { + dfltBetweenWordsSilence = atoi(var->value); + } else if (!strcasecmp(var->name, "maximum_number_of_words")) { + dfltMaximumNumberOfWords = atoi(var->value); + } else { + ast_log(LOG_WARNING, "%s: Cat:%s. Unknown keyword %s at line %d of amd.conf\n", + app, cat, var->name, var->lineno); + } + var = var->next; + } + } + cat = ast_category_browse(cfg, cat); + } + ast_config_destroy(cfg); + + ast_verbose(VERBOSE_PREFIX_3 "AMD defaults: initialSilence [%d] greeting [%d] afterGreetingSilence [%d] " + "totalAnalysisTime [%d] minimumWordLength [%d] betweenWordsSilence [%d] maximumNumberOfWords [%d] silenceThreshold [%d] \n", + dfltInitialSilence, dfltGreeting, dfltAfterGreetingSilence, dfltTotalAnalysisTime, + dfltMinimumWordLength, dfltBetweenWordsSilence, dfltMaximumNumberOfWords, dfltSilenceThreshold ); + + return; +} + +int unload_module(void) +{ + STANDARD_HANGUP_LOCALUSERS; + return ast_unregister_application(app); +} + +int load_module(void) +{ + load_config(); + return ast_register_application(app, amd_exec, synopsis, descrip); +} + +int reload(void) +{ + load_config(); + return 0; +} + +char *description(void) +{ + return tdesc; +} + +int usecount(void) +{ + int res; + STANDARD_USECOUNT(res); + return res; +} + +char *key() +{ + return ASTERISK_GPL_KEY; +} + -- cgit v1.2.3