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6ff8f14865
Echo()'s description states that it echoes audio, video, and DTMF except for # while it actually echoes any frame that it receives other than DTMF #. This was causing frame storms in the test suite in some circumstances where Echo() was attached to both ends of a pair of local channels and control frames were being periodically generated. Echo()'s behavior and description have been modifed so that it only echoes media and non-# DTMF frames. ........ Merged revisions 360033 from http://svn.asterisk.org/svn/asterisk/branches/1.8 ........ Merged revisions 360034 from http://svn.asterisk.org/svn/asterisk/branches/10 git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@360036 65c4cc65-6c06-0410-ace0-fbb531ad65f3
103 lines
2.5 KiB
C
103 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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* \author Mark Spencer <markster@digium.com>
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*
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* \ingroup applications
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/file.h"
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#include "asterisk/module.h"
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#include "asterisk/channel.h"
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/*** DOCUMENTATION
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<application name="Echo" language="en_US">
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<synopsis>
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Echo media, DTMF back to the calling party
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</synopsis>
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<syntax />
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<description>
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<para>Echos back any media or DTMF frames read from the calling
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channel back to itself. This will not echo CONTROL, MODEM, or NULL
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frames. Note: If '#' detected application exits.</para>
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<para>This application does not automatically answer and should be
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preceeded by an application such as Answer() or Progress().</para>
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</description>
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</application>
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***/
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static const char app[] = "Echo";
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static int echo_exec(struct ast_channel *chan, const char *data)
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{
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int res = -1;
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struct ast_format format;
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ast_best_codec(ast_channel_nativeformats(chan), &format);
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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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struct ast_frame *f = ast_read(chan);
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if (!f) {
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break;
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}
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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_CONTROL
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&& f->frametype != AST_FRAME_MODEM
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&& f->frametype != AST_FRAME_NULL
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&& ast_write(chan, f)) {
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ast_frfree(f);
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goto end;
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}
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if ((f->frametype == AST_FRAME_DTMF) && (f->subclass.integer == '#')) {
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res = 0;
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ast_frfree(f);
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goto end;
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}
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ast_frfree(f);
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}
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end:
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return res;
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}
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static int unload_module(void)
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{
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return ast_unregister_application(app);
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}
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static int load_module(void)
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{
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return ast_register_application_xml(app, echo_exec);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Simple Echo Application");
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