Add talk detectection app (BackgroundDetect)
authorMark Spencer <markster@digium.com>
Fri, 11 Jun 2004 14:06:30 +0000 (14:06 +0000)
committerMark Spencer <markster@digium.com>
Fri, 11 Jun 2004 14:06:30 +0000 (14:06 +0000)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3188 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/Makefile
apps/app_talkdetect.c [new file with mode: 0755]

index 5ff4a69..f0a11b8 100755 (executable)
@@ -27,7 +27,8 @@ APPS=app_dial.so app_playback.so app_voicemail.so app_directory.so app_mp3.so\
      app_hasnewvoicemail.so app_sayunixtime.so app_cut.so app_read.so \
      app_setcdruserfield.so app_random.so app_ices.so app_eval.so \
      app_nbscat.so app_sendtext.so app_exec.so app_sms.so \
-     app_groupcount.so app_txtcidname.so app_controlplayback.so
+     app_groupcount.so app_txtcidname.so app_controlplayback.so \
+        app_talkdetect.so
 
 ifneq (${OSARCH},Darwin)
 APPS+=app_intercom.so
diff --git a/apps/app_talkdetect.c b/apps/app_talkdetect.c
new file mode 100755 (executable)
index 0000000..1157ac3
--- /dev/null
@@ -0,0 +1,218 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Playback a file with audio detect
+ * 
+ * Copyright (C) 2004, Digium, Inc.
+ *
+ * Mark Spencer <markster@digium.com>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+#include <asterisk/lock.h>
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/channel.h>
+#include <asterisk/pbx.h>
+#include <asterisk/module.h>
+#include <asterisk/translate.h>
+#include <asterisk/utils.h>
+#include <asterisk/dsp.h>
+#include <string.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+static char *tdesc = "Playback with Talk Detection";
+
+static char *app = "BackgroundDetect";
+
+static char *synopsis = "Background a file with talk detect";
+
+static char *descrip = 
+"  BackgroundDetect(filename[|sil[|min|[max]]]):  Plays  back  a  given\n"
+"filename, waiting for interruption from a given digit (the digit must\n"
+"start the beginning of a valid extension, or it will be ignored).\n"
+"During the playback of the file, audio is monitored in the receive\n"
+"direction, and if a period of non-silence which is greater than 'min' ms\n"
+"yet less than 'max' ms is followed by silence for at least 'sil' ms then\n"
+"the audio playback is aborted and processing jumps to the 'talk' extension\n"
+"if available.  If unspecified, sil, min, and max default to 1000, 100, and\n"
+"infinity respectively.  Returns -1 on hangup, and 0 on successful playback\n"
+"completion with no exit conditions.\n";
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+static int background_detect_exec(struct ast_channel *chan, void *data)
+{
+       int res = 0;
+       struct localuser *u;
+       char tmp[256];
+       char *options;
+       char *stringp;
+       struct ast_frame *fr;
+       int notsilent=0;
+       struct timeval start = { 0, 0}, end = {0, 0};
+       int sil = 1000;
+       int min = 100;
+       int max = -1;
+       int x;
+       int origrformat=0;
+       struct ast_dsp *dsp;
+       if (!data || ast_strlen_zero((char *)data)) {
+               ast_log(LOG_WARNING, "BackgroundDetect requires an argument (filename)\n");
+               return -1;
+       }
+       strncpy(tmp, (char *)data, sizeof(tmp)-1);
+       stringp=tmp;
+       strsep(&stringp, "|");
+       options = strsep(&stringp, "|");
+       if (options) {
+               if ((sscanf(options, "%d", &x) == 1) && (x > 0))
+                       sil = x;
+               options = strsep(&stringp, "|");
+               if (options) {
+                       if ((sscanf(options, "%d", &x) == 1) && (x > 0))
+                               min = x;
+                       options = strsep(&stringp, "|");
+                       if (options) {
+                               if ((sscanf(options, "%d", &x) == 1) && (x > 0))
+                                       max = x;
+                       }
+               }
+       }
+       ast_log(LOG_DEBUG, "Preparing detect of '%s', sil=%d,min=%d,max=%d\n", 
+                                               tmp, sil, min, max);
+       LOCAL_USER_ADD(u);
+       if (chan->_state != AST_STATE_UP) {
+               /* Otherwise answer unless we're supposed to send this while on-hook */
+               res = ast_answer(chan);
+       }
+       if (!res) {
+               origrformat = chan->readformat;
+               if ((res = ast_set_read_format(chan, AST_FORMAT_SLINEAR))) 
+                       ast_log(LOG_WARNING, "Unable to set read format to linear!\n");
+       }
+       if (!(dsp = ast_dsp_new())) {
+               ast_log(LOG_WARNING, "Unable to allocate DSP!\n");
+               res = -1;
+       }
+       if (!res) {
+               ast_stopstream(chan);
+               res = ast_streamfile(chan, tmp, chan->language);
+               if (!res) {
+                       while(chan->stream) {
+                               res = ast_sched_wait(chan->sched);
+                               if ((res < 0) && !chan->timingfunc) {
+                                       res = 0;
+                                       break;
+                               }
+                               if (res < 0)
+                                       res = 1000;
+                               res = ast_waitfor(chan, res);
+                               if (res < 0) {
+                                       ast_log(LOG_WARNING, "Waitfor failed on %s\n", chan->name);
+                                       break;
+                               } else if (res > 0) {
+                                       fr = ast_read(chan);
+                                       if (!fr) {
+                                               res = -1;
+                                               break;
+                                       } else if (fr->frametype == AST_FRAME_DTMF) {
+                                               char t[2];
+                                               t[0] = fr->subclass;
+                                               t[1] = '\0';
+                                               if (ast_canmatch_extension(chan, chan->context, t, 1, chan->callerid)) {
+                                                       /* They entered a valid  extension, or might be anyhow */
+                                                       res = fr->subclass;
+                                                       ast_frfree(fr);
+                                                       break;
+                                               }
+                                       } else if (fr->frametype == AST_FRAME_VOICE) {
+                                               int totalsilence;
+                                               int ms;
+                                               res = ast_dsp_silence(dsp, fr, &totalsilence);
+                                               if (res && (totalsilence > sil)) {
+                                                       /* We've been quiet a little while */
+                                                       if (notsilent) {
+                                                               /* We had heard some talking */
+                                                               gettimeofday(&end, NULL);
+                                                               ms = (end.tv_sec - start.tv_sec) * 1000;
+                                                               ms += (end.tv_usec - start.tv_usec) / 1000;
+                                                               ms -= sil;
+                                                               if (ms < 0)
+                                                                       ms = 0;
+                                                               if ((ms > min) && ((max < 0) || (ms < max))) {
+                                                                       ast_log(LOG_DEBUG, "Found qualified token of %d ms\n", ms);
+                                                                       if (ast_exists_extension(chan, chan->context, "talk", 1, chan->callerid)) {
+                                                                               strncpy(chan->exten, "talk", sizeof(chan->exten) -1 );
+                                                                               chan->priority = 0;
+                                                                       }
+                                                                       res = 0;
+                                                                       ast_frfree(fr);
+                                                                       break;
+                                                               } else
+                                                                       ast_log(LOG_DEBUG, "Found unqualified token of %d ms\n", ms);
+                                                               notsilent = 0;
+                                                       }
+                                               } else {
+                                                       if (!notsilent) {
+                                                               /* Heard some audio, mark the begining of the token */
+                                                               gettimeofday(&start, NULL);
+                                                               ast_log(LOG_DEBUG, "Start of voice token!\n");
+                                                               notsilent = 1;
+                                                       }
+                                               }
+                                               
+                                       }
+                                       ast_frfree(fr);
+                               }
+                       }
+                       ast_stopstream(chan);
+               } else {
+                       ast_log(LOG_WARNING, "ast_streamfile failed on %s for %s\n", chan->name, (char *)data);
+                       res = 0;
+               }
+       }
+       if (res > -1) {
+               if (origrformat && ast_set_read_format(chan, origrformat)) {
+                       ast_log(LOG_WARNING, "Failed to restore read format for %s to %s\n", 
+                               chan->name, ast_getformatname(origrformat));
+               }
+       }
+       if (dsp)
+               ast_dsp_free(dsp);
+       LOCAL_USER_REMOVE(u);
+       return res;
+}
+
+int unload_module(void)
+{
+       STANDARD_HANGUP_LOCALUSERS;
+       return ast_unregister_application(app);
+}
+
+int load_module(void)
+{
+       return ast_register_application(app, background_detect_exec, synopsis, descrip);
+}
+
+char *description(void)
+{
+       return tdesc;
+}
+
+int usecount(void)
+{
+       int res;
+       STANDARD_USECOUNT(res);
+       return res;
+}
+
+char *key()
+{
+       return ASTERISK_GPL_KEY;
+}