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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* 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.
*/
/*! \file
*
* \brief Echo application -- play back what you hear to evaluate latency
*
* \ingroup applications
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/lock.h"
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
static char *tdesc = "Simple Echo Application";
static char *app = "Echo";
static char *synopsis = "Echo audio, video, or DTMF back to the calling party";
static char *descrip =
" Echo(): This application will echo any audio, video, or DTMF frames read from\n"
"the calling channel back to itself. If the DTMF digit '#' is received, the\n"
"application will exit.\n";
STANDARD_LOCAL_USER;
LOCAL_USER_DECL;
static int echo_exec(struct ast_channel *chan, void *data)
{
int res = -1;
int format;
struct localuser *u;
struct ast_frame *f;
LOCAL_USER_ADD(u);
format = ast_best_codec(chan->nativeformats);
ast_set_write_format(chan, format);
ast_set_read_format(chan, format);
while (ast_waitfor(chan, -1) > -1) {
f = ast_read(chan);
if (!f)
break;
f->delivery.tv_sec = 0;
f->delivery.tv_usec = 0;
if (f->frametype == AST_FRAME_VOICE) {
if (ast_write(chan, f))
break;
} else if (f->frametype == AST_FRAME_VIDEO) {
if (ast_write(chan, f))
break;
} else if (f->frametype == AST_FRAME_DTMF) {
if (f->subclass == '#') {
res = 0;
break;
} else {
if (ast_write(chan, f))
break;
}
}
ast_frfree(f);
}
LOCAL_USER_REMOVE(u);
return res;
}
int unload_module(void)
{
int res;
res = ast_unregister_application(app);
STANDARD_HANGUP_LOCALUSERS;
return res;
}
int load_module(void)
{
return ast_register_application(app, echo_exec, synopsis, descrip);
}
char *description(void)
{
return tdesc;
}
int usecount(void)
{
int res;
STANDARD_USECOUNT(res);
return res;
}
char *key()
{
return ASTERISK_GPL_KEY;
}
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