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