131 lines
2.5 KiB
C
131 lines
2.5 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 Echo application -- play back what you hear to evaluate latency
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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 <unistd.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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static char *tdesc = "Simple Echo Application";
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static char *app = "Echo";
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static char *synopsis = "Echo audio, video, or DTMF back to the calling party";
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static char *descrip =
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" Echo(): This application will echo any audio, video, or DTMF frames read from\n"
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"the calling channel back to itself. If the DTMF digit '#' is received, the\n"
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"application will exit.\n";
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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static int echo_exec(struct ast_channel *chan, void *data)
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{
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int res = -1;
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int format;
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struct localuser *u;
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struct ast_frame *f;
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LOCAL_USER_ADD(u);
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format = ast_best_codec(chan->nativeformats);
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ast_set_write_format(chan, format);
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ast_set_read_format(chan, format);
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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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break;
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f->delivery.tv_sec = 0;
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f->delivery.tv_usec = 0;
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if (f->frametype == AST_FRAME_VOICE) {
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if (ast_write(chan, f))
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break;
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} else if (f->frametype == AST_FRAME_VIDEO) {
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if (ast_write(chan, f))
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break;
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} else if (f->frametype == AST_FRAME_DTMF) {
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if (f->subclass == '#') {
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res = 0;
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break;
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} else {
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if (ast_write(chan, f))
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break;
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}
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}
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ast_frfree(f);
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}
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LOCAL_USER_REMOVE(u);
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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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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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int load_module(void)
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{
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return ast_register_application(app, echo_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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