e43bc6634d
As partly documented in loader.c and include/asterisk/module.h, modules are now expected to return all of their methods and flags into a structure 'mod_data', and are normally loaded with RTLD_NOW | RTLD_LOCAL, so symbols are resolved immediately and conflicts should be less likely. Only in a small number of cases (res_*, typically) modules are loaded RTLD_GLOBAL, so they can export symbols. The core of the change is only the two files loader.c and include/asterisk/module.h, all the rest is simply adaptation of the existing modules to the new API, a rather mechanical (but believe me, time and finger-consuming!) process whose detail you can figure out by svn diff'ing any single module. Expect some minor compilation issue after this change, please report it on mantis http://bugs.digium.com/view.php?id=6968 so we collect all the feedback in one place. I am just sorry that this change missed SVN version number 20000! git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@20003 65c4cc65-6c06-0410-ace0-fbb531ad65f3
244 lines
6.2 KiB
C
244 lines
6.2 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Playback a file with audio detect
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*
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* \author Mark Spencer <markster@digium.com>
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*
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* \ingroup applications
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/lock.h"
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#include "asterisk/file.h"
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#include "asterisk/logger.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/translate.h"
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#include "asterisk/utils.h"
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#include "asterisk/dsp.h"
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static char *tdesc = "Playback with Talk Detection";
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static char *app = "BackgroundDetect";
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static char *synopsis = "Background a file with talk detect";
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static char *descrip =
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" BackgroundDetect(filename[|sil[|min|[max]]]): Plays back a given\n"
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"filename, waiting for interruption from a given digit (the digit must\n"
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"start the beginning of a valid extension, or it will be ignored).\n"
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"During the playback of the file, audio is monitored in the receive\n"
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"direction, and if a period of non-silence which is greater than 'min' ms\n"
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"yet less than 'max' ms is followed by silence for at least 'sil' ms then\n"
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"the audio playback is aborted and processing jumps to the 'talk' extension\n"
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"if available. If unspecified, sil, min, and max default to 1000, 100, and\n"
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"infinity respectively.\n";
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LOCAL_USER_DECL;
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static int background_detect_exec(struct ast_channel *chan, void *data)
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{
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int res = 0;
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struct localuser *u;
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char *tmp;
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char *options;
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char *stringp;
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struct ast_frame *fr;
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int notsilent=0;
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struct timeval start = { 0, 0};
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int sil = 1000;
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int min = 100;
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int max = -1;
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int x;
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int origrformat=0;
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struct ast_dsp *dsp;
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "BackgroundDetect requires an argument (filename)\n");
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return -1;
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}
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LOCAL_USER_ADD(u);
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if (!(tmp = ast_strdupa(data))) {
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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stringp=tmp;
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strsep(&stringp, "|");
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options = strsep(&stringp, "|");
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if (options) {
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if ((sscanf(options, "%d", &x) == 1) && (x > 0))
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sil = x;
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options = strsep(&stringp, "|");
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if (options) {
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if ((sscanf(options, "%d", &x) == 1) && (x > 0))
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min = x;
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options = strsep(&stringp, "|");
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if (options) {
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if ((sscanf(options, "%d", &x) == 1) && (x > 0))
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max = x;
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}
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}
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}
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ast_log(LOG_DEBUG, "Preparing detect of '%s', sil=%d,min=%d,max=%d\n",
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tmp, sil, min, max);
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if (chan->_state != AST_STATE_UP) {
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/* Otherwise answer unless we're supposed to send this while on-hook */
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res = ast_answer(chan);
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}
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if (!res) {
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origrformat = chan->readformat;
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if ((res = ast_set_read_format(chan, AST_FORMAT_SLINEAR)))
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ast_log(LOG_WARNING, "Unable to set read format to linear!\n");
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}
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if (!(dsp = ast_dsp_new())) {
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ast_log(LOG_WARNING, "Unable to allocate DSP!\n");
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res = -1;
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}
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if (!res) {
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ast_stopstream(chan);
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res = ast_streamfile(chan, tmp, chan->language);
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if (!res) {
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while(chan->stream) {
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res = ast_sched_wait(chan->sched);
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if ((res < 0) && !chan->timingfunc) {
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res = 0;
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break;
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}
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if (res < 0)
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res = 1000;
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res = ast_waitfor(chan, res);
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if (res < 0) {
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ast_log(LOG_WARNING, "Waitfor failed on %s\n", chan->name);
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break;
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} else if (res > 0) {
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fr = ast_read(chan);
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if (!fr) {
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res = -1;
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break;
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} else if (fr->frametype == AST_FRAME_DTMF) {
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char t[2];
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t[0] = fr->subclass;
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t[1] = '\0';
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if (ast_canmatch_extension(chan, chan->context, t, 1, chan->cid.cid_num)) {
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/* They entered a valid extension, or might be anyhow */
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res = fr->subclass;
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ast_frfree(fr);
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break;
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}
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} else if ((fr->frametype == AST_FRAME_VOICE) && (fr->subclass == AST_FORMAT_SLINEAR)) {
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int totalsilence;
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int ms;
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res = ast_dsp_silence(dsp, fr, &totalsilence);
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if (res && (totalsilence > sil)) {
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/* We've been quiet a little while */
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if (notsilent) {
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/* We had heard some talking */
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ms = ast_tvdiff_ms(ast_tvnow(), start);
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ms -= sil;
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if (ms < 0)
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ms = 0;
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if ((ms > min) && ((max < 0) || (ms < max))) {
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char ms_str[10];
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ast_log(LOG_DEBUG, "Found qualified token of %d ms\n", ms);
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/* Save detected talk time (in milliseconds) */
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sprintf(ms_str, "%d", ms );
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pbx_builtin_setvar_helper(chan, "TALK_DETECTED", ms_str);
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ast_goto_if_exists(chan, chan->context, "talk", 1);
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res = 0;
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ast_frfree(fr);
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break;
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} else
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ast_log(LOG_DEBUG, "Found unqualified token of %d ms\n", ms);
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notsilent = 0;
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}
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} else {
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if (!notsilent) {
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/* Heard some audio, mark the begining of the token */
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start = ast_tvnow();
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ast_log(LOG_DEBUG, "Start of voice token!\n");
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notsilent = 1;
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}
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}
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}
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ast_frfree(fr);
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}
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ast_sched_runq(chan->sched);
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}
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ast_stopstream(chan);
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} else {
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ast_log(LOG_WARNING, "ast_streamfile failed on %s for %s\n", chan->name, (char *)data);
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res = 0;
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}
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}
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if (res > -1) {
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if (origrformat && ast_set_read_format(chan, origrformat)) {
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ast_log(LOG_WARNING, "Failed to restore read format for %s to %s\n",
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chan->name, ast_getformatname(origrformat));
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}
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}
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if (dsp)
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ast_dsp_free(dsp);
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LOCAL_USER_REMOVE(u);
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return res;
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}
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static int unload_module(void *mod)
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{
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int res;
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res = ast_unregister_application(app);
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STANDARD_HANGUP_LOCALUSERS;
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return res;
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}
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static int load_module(void *mod)
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{
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return ast_register_application(app, background_detect_exec, synopsis, descrip);
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}
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static const char *description(void)
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{
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return tdesc;
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}
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static const char *key(void)
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{
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return ASTERISK_GPL_KEY;
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}
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STD_MOD1;
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