Wait for Silence
#include "asterisk.h"
#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/dsp.h"
#include "asterisk/module.h"
Go to the source code of this file.
Functions | |
static void | __reg_module (void) |
static void | __unreg_module (void) |
static int | do_waiting (struct ast_channel *chan, int timereqd, time_t waitstart, int timeout, int wait_for_silence) |
static int | load_module (void) |
static int | unload_module (void) |
static int | waitfor_exec (struct ast_channel *chan, void *data, int wait_for_silence) |
static int | waitfornoise_exec (struct ast_channel *chan, void *data) |
static int | waitforsilence_exec (struct ast_channel *chan, void *data) |
Variables | |
static struct ast_module_info __MODULE_INFO_SECTION | __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Wait For Silence" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, } |
static char * | app_noise = "WaitForNoise" |
static char * | app_silence = "WaitForSilence" |
static struct ast_module_info * | ast_module_info = &__mod_info |
Wait for Silence
Wait For Noise The same as Wait For Silence but listenes noise on the chennel that is above
the pre-configured silence threshold from dsp.conf
Definition in file app_waitforsilence.c.
static void __reg_module | ( | void | ) | [static] |
Definition at line 272 of file app_waitforsilence.c.
static void __unreg_module | ( | void | ) | [static] |
Definition at line 272 of file app_waitforsilence.c.
static int do_waiting | ( | struct ast_channel * | chan, |
int | timereqd, | ||
time_t | waitstart, | ||
int | timeout, | ||
int | wait_for_silence | ||
) | [static] |
Definition at line 125 of file app_waitforsilence.c.
References ast_debug, ast_dsp_free(), ast_dsp_get_threshold_from_settings(), ast_dsp_new(), ast_dsp_noise(), ast_dsp_set_threshold(), ast_dsp_silence(), AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_frfree, ast_getformatname(), ast_log(), ast_read(), ast_set_read_format(), ast_verb, ast_waitfor(), f, ast_frame::frametype, LOG_WARNING, ast_channel::name, pbx_builtin_setvar_helper(), ast_channel::readformat, and THRESHOLD_SILENCE.
Referenced by waitfor_exec().
{ struct ast_frame *f = NULL; int dsptime = 0; int rfmt = 0; int res = 0; struct ast_dsp *sildet; /* silence detector dsp */ time_t now; /*Either silence or noise calc depending on wait_for_silence flag*/ int (*ast_dsp_func)(struct ast_dsp*, struct ast_frame*, int*) = wait_for_silence ? ast_dsp_silence : ast_dsp_noise; rfmt = chan->readformat; /* Set to linear mode */ if ((res = ast_set_read_format(chan, AST_FORMAT_SLINEAR)) < 0) { ast_log(LOG_WARNING, "Unable to set channel to linear mode, giving up\n"); return -1; } /* Create the silence detector */ if (!(sildet = ast_dsp_new())) { ast_log(LOG_WARNING, "Unable to create silence detector :(\n"); return -1; } ast_dsp_set_threshold(sildet, ast_dsp_get_threshold_from_settings(THRESHOLD_SILENCE)); /* Await silence... */ for (;;) { /* Start with no silence received */ dsptime = 0; res = ast_waitfor(chan, timereqd); /* Must have gotten a hangup; let's exit */ if (res < 0) { pbx_builtin_setvar_helper(chan, "WAITSTATUS", "HANGUP"); break; } /* We waited and got no frame; sounds like digital silence or a muted digital channel */ if (res == 0) { dsptime = timereqd; } else { /* Looks like we did get a frame, so let's check it out */ if (!(f = ast_read(chan))) { pbx_builtin_setvar_helper(chan, "WAITSTATUS", "HANGUP"); break; } if (f->frametype == AST_FRAME_VOICE) { ast_dsp_func(sildet, f, &dsptime); } ast_frfree(f); } ast_verb(6, "Got %dms %s < %dms required\n", dsptime, wait_for_silence ? "silence" : "noise", timereqd); if (dsptime >= timereqd) { ast_verb(3, "Exiting with %dms %s >= %dms required\n", dsptime, wait_for_silence ? "silence" : "noise", timereqd); /* Ended happily with silence */ res = 1; pbx_builtin_setvar_helper(chan, "WAITSTATUS", wait_for_silence ? "SILENCE" : "NOISE"); ast_debug(1, "WAITSTATUS was set to %s\n", wait_for_silence ? "SILENCE" : "NOISE"); break; } if (timeout && (difftime(time(&now), waitstart) >= timeout)) { pbx_builtin_setvar_helper(chan, "WAITSTATUS", "TIMEOUT"); ast_debug(1, "WAITSTATUS was set to TIMEOUT\n"); res = 0; break; } } if (rfmt && ast_set_read_format(chan, rfmt)) { ast_log(LOG_WARNING, "Unable to restore format %s to channel '%s'\n", ast_getformatname(rfmt), chan->name); } ast_dsp_free(sildet); return res; }
static int load_module | ( | void | ) | [static] |
Definition at line 263 of file app_waitforsilence.c.
References ast_register_application_xml, waitfornoise_exec(), and waitforsilence_exec().
{ int res; res = ast_register_application_xml(app_silence, waitforsilence_exec); res |= ast_register_application_xml(app_noise, waitfornoise_exec); return res; }
static int unload_module | ( | void | ) | [static] |
Definition at line 254 of file app_waitforsilence.c.
References ast_unregister_application().
{ int res; res = ast_unregister_application(app_silence); res |= ast_unregister_application(app_noise); return res; }
static int waitfor_exec | ( | struct ast_channel * | chan, |
void * | data, | ||
int | wait_for_silence | ||
) | [static] |
Definition at line 205 of file app_waitforsilence.c.
References ast_channel::_state, ast_answer(), ast_channel_start_silence_generator(), ast_channel_stop_silence_generator(), ast_log(), ast_opt_transmit_silence, AST_STATE_UP, ast_verb, do_waiting(), and LOG_WARNING.
Referenced by waitfornoise_exec(), and waitforsilence_exec().
{ int res = 1; int timereqd = 1000; int timeout = 0; int iterations = 1, i; time_t waitstart; struct ast_silence_generator *silgen = NULL; if (chan->_state != AST_STATE_UP) { res = ast_answer(chan); /* Answer the channel */ } if (!data || ( (sscanf(data, "%30d,%30d,%30d", &timereqd, &iterations, &timeout) != 3) && (sscanf(data, "%30d,%30d", &timereqd, &iterations) != 2) && (sscanf(data, "%30d", &timereqd) != 1) ) ) { ast_log(LOG_WARNING, "Using default value of 1000ms, 1 iteration, no timeout\n"); } ast_verb(3, "Waiting %d time(s) for %d ms silence with %d timeout\n", iterations, timereqd, timeout); if (ast_opt_transmit_silence) { silgen = ast_channel_start_silence_generator(chan); } time(&waitstart); res = 1; for (i=0; (i<iterations) && (res == 1); i++) { res = do_waiting(chan, timereqd, waitstart, timeout, wait_for_silence); } if (silgen) { ast_channel_stop_silence_generator(chan, silgen); } if (res > 0) res = 0; return res; }
static int waitfornoise_exec | ( | struct ast_channel * | chan, |
void * | data | ||
) | [static] |
Definition at line 249 of file app_waitforsilence.c.
References waitfor_exec().
Referenced by load_module().
{ return waitfor_exec(chan, data, 0); }
static int waitforsilence_exec | ( | struct ast_channel * | chan, |
void * | data | ||
) | [static] |
Definition at line 244 of file app_waitforsilence.c.
References waitfor_exec().
Referenced by load_module().
{ return waitfor_exec(chan, data, 1); }
struct ast_module_info __MODULE_INFO_SECTION __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Wait For Silence" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, } [static] |
Definition at line 272 of file app_waitforsilence.c.
char* app_noise = "WaitForNoise" [static] |
Definition at line 123 of file app_waitforsilence.c.
char* app_silence = "WaitForSilence" [static] |
Definition at line 122 of file app_waitforsilence.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 272 of file app_waitforsilence.c.