262 lines
6.6 KiB
C
Executable File
262 lines
6.6 KiB
C
Executable File
/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* Trivial application to record a sound file
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*
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* Copyright (C) 2001, Linux Support Services, Inc.
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*
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* Matthew Fredrickson <creslin@linux-support.net>
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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
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*/
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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/dsp.h>
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#include <string.h>
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#include <stdlib.h>
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static char *tdesc = "Trivial Record Application";
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static char *app = "Record";
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static char *synopsis = "Record to a file";
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static char *descrip =
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" Record(filename:format|silence): Records from the channel into a given\n"
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"filename. If the file exists it will be overwritten. \n"
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"- 'format' is the format of the file type to be recorded (wav, gsm, etc).\n"
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"- 'silence' is the number of seconds of silence to allow before returning.\n\n"
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"If filename contains '%d', these characters will be replaced with a number\n"
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"incremented by one each time the file is recorded. \n\n"
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"Formats: g723, g729, gsm, h263, ulaw, alaw, vox, wav, WAV\n\n"
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"User can press '#' to terminate the recording and continue to the next priority.\n\n"
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"Returns -1 when the user hangs up.\n";
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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static int record_exec(struct ast_channel *chan, void *data)
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{
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int res = 0;
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int count = 0;
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int percentflag = 0;
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char fil[256];
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char tmp[256];
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char ext[10];
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char * vdata; /* Used so I don't have to typecast every use of *data */
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int i = 0;
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int j = 0;
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struct ast_filestream *s = '\0';
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struct localuser *u;
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struct ast_frame *f = NULL;
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struct ast_dsp *sildet = NULL; /* silence detector dsp */
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int totalsilence = 0;
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int dspsilence = 0;
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int silence = 0; /* amount of silence to allow */
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int gotsilence = 0; /* did we timeout for silence? */
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char silencestr[5];
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int k = 0;
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int rfmt = 0;
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vdata = data; /* explained above */
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/* The next few lines of code parse out the filename and header from the input string */
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if (!vdata) { /* no data implies no filename or anything is present */
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ast_log(LOG_WARNING, "Record requires an argument (filename)\n");
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return -1;
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}
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for (; vdata[i] && (vdata[i] != ':') && (vdata[i] != '|'); i++ ) {
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if ((vdata[i] == '%') && (vdata[i+1] == 'd')) {
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percentflag = 1; /* the wildcard is used */
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}
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if (i == strlen(vdata) ) {
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ast_log(LOG_WARNING, "No extension found\n");
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return -1;
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}
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fil[i] = vdata[i];
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}
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fil[i++] = '\0';
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for (; j < 10 && i < strlen(data) && (vdata[i] != '|'); i++, j++)
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ext[j] = vdata[i];
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ext[j] = '\0';
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if (vdata[i] && (vdata[i] == '|')) i++;
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for (; vdata[i] && (vdata[i] != '|') && (k < 3) && i < strlen(data); i++, k++)
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silencestr[k] = vdata[i];
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silencestr[k] = '\0';
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if (silencestr) {
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silence = atoi(silencestr);
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if (silence > 0)
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silence *= 1000;
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}
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/* done parsing */
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/* these are to allow the use of the %d in the config file for a wild card of sort to
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create a new file with the inputed name scheme */
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if (percentflag) {
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do {
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snprintf(tmp, 256, fil, count);
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count++;
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} while ( ast_fileexists(tmp, ext, chan->language) != -1 );
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pbx_builtin_setvar_helper(chan, "RECORDED_FILE", tmp);
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} else
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strncpy(tmp, fil, 256-1);
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/* end of routine mentioned */
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LOCAL_USER_ADD(u);
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if (chan->_state != AST_STATE_UP) {
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res = ast_answer(chan); /* Shouldn't need this, but checking to see if channel is already answered
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* Theoretically asterisk should already have answered before running the app */
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}
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if (!res) {
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/* Some code to play a nice little beep to signify the start of the record operation */
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res = ast_streamfile(chan, "beep", chan->language);
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if (!res) {
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res = ast_waitstream(chan, "");
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} else {
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ast_log(LOG_WARNING, "ast_streamfile failed on %s\n", chan->name);
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}
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ast_stopstream(chan);
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/* The end of beep code. Now the recording starts */
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if (silence > 0) {
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rfmt = chan->readformat;
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res = ast_set_read_format(chan, AST_FORMAT_SLINEAR);
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if (res < 0) {
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ast_log(LOG_WARNING, "Unable to set to linear mode, giving up\n");
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return -1;
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}
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sildet = ast_dsp_new();
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if (!sildet) {
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ast_log(LOG_WARNING, "Unable to create silence detector :(\n");
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return -1;
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}
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ast_dsp_set_threshold(sildet, 256);
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}
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s = ast_writefile( tmp, ext, NULL, O_CREAT|O_TRUNC|O_WRONLY , 0, 0644);
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if (s) {
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while (ast_waitfor(chan, -1) > -1) {
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f = ast_read(chan);
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if (!f) {
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res = -1;
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break;
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}
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if (f->frametype == AST_FRAME_VOICE) {
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res = ast_writestream(s, f);
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if (res) {
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ast_log(LOG_WARNING, "Problem writing frame\n");
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break;
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}
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if (silence > 0) {
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dspsilence = 0;
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ast_dsp_silence(sildet, f, &dspsilence);
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if (dspsilence) {
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totalsilence = dspsilence;
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} else {
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totalsilence = 0;
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}
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if (totalsilence > silence) {
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/* Ended happily with silence */
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ast_frfree(f);
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gotsilence = 1;
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break;
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}
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}
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}
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if (f->frametype == AST_FRAME_VIDEO) {
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res = ast_writestream(s, f);
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if (res) {
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ast_log(LOG_WARNING, "Problem writing frame\n");
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break;
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}
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}
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if ((f->frametype == AST_FRAME_DTMF) &&
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(f->subclass == '#')) {
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ast_frfree(f);
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break;
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}
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ast_frfree(f);
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}
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if (!f) {
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ast_log(LOG_DEBUG, "Got hangup\n");
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res = -1;
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}
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if (gotsilence) {
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ast_stream_rewind(s, silence-1000);
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ast_truncstream(s);
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} else {
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/* Strip off the last 1/4 second of it */
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ast_stream_rewind(s, 250);
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ast_truncstream(s);
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}
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ast_closestream(s);
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} else
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ast_log(LOG_WARNING, "Could not create file %s\n", fil);
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} else
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ast_log(LOG_WARNING, "Could not answer channel '%s'\n", chan->name);
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LOCAL_USER_REMOVE(u);
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if (silence > 0) {
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res = ast_set_read_format(chan, rfmt);
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if (res)
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ast_log(LOG_WARNING, "Unable to restore read format on '%s'\n", chan->name);
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if (sildet)
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ast_dsp_free(sildet);
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}
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return res;
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}
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int unload_module(void)
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{
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STANDARD_HANGUP_LOCALUSERS;
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return ast_unregister_application(app);
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}
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int load_module(void)
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{
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return ast_register_application(app, record_exec, synopsis, descrip);
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}
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char *description(void)
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{
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return tdesc;
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}
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int usecount(void)
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{
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int res;
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STANDARD_USECOUNT(res);
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return res;
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}
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char *key()
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{
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return ASTERISK_GPL_KEY;
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}
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