113 lines
2.7 KiB
C
113 lines
2.7 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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#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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int fir_sent = 0;
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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->subclass.integer == AST_CONTROL_VIDUPDATE) {
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if (ast_write(chan, f) < 0) {
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ast_frfree(f);
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goto end;
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}
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fir_sent = 1;
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}
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if (!fir_sent && f->frametype == AST_FRAME_VIDEO) {
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struct ast_frame frame = {
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.frametype = AST_FRAME_CONTROL,
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.subclass.integer = AST_CONTROL_VIDUPDATE,
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};
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ast_write(chan, &frame);
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fir_sent = 1;
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}
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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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