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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
*
* \author Mark Spencer <markster@digium.com>
*
* \ingroup applications
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/file.h"
#include "asterisk/module.h"
#include "asterisk/channel.h"
/*** DOCUMENTATION
<application name="Echo" language="en_US">
<synopsis>
Echo audio, video, DTMF back to the calling party
</synopsis>
<syntax />
<description>
<para>Echos back any audio, video or DTMF frames read from the calling
channel back to itself. Note: If '#' detected application exits</para>
</description>
</application>
***/
static char *app = "Echo";
static int echo_exec(struct ast_channel *chan, void *data)
{
int res = -1;
int format;
format = ast_best_codec(chan->nativeformats);
ast_set_write_format(chan, format);
ast_set_read_format(chan, format);
while (ast_waitfor(chan, -1) > -1) {
struct ast_frame *f = ast_read(chan);
if (!f) {
break;
}
f->delivery.tv_sec = 0;
f->delivery.tv_usec = 0;
if (ast_write(chan, f)) {
ast_frfree(f);
goto end;
}
if ((f->frametype == AST_FRAME_DTMF) && (f->subclass == '#')) {
res = 0;
ast_frfree(f);
goto end;
}
ast_frfree(f);
}
end:
return res;
}
static int unload_module(void)
{
return ast_unregister_application(app);
}
static int load_module(void)
{
return ast_register_application_xml(app, echo_exec);
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Simple Echo Application");
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