diff options
Diffstat (limited to 'trunk/apps/app_echo.c')
-rw-r--r-- | trunk/apps/app_echo.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/trunk/apps/app_echo.c b/trunk/apps/app_echo.c new file mode 100644 index 000000000..89242ffa0 --- /dev/null +++ b/trunk/apps/app_echo.c @@ -0,0 +1,86 @@ +/* + * 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" + +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"; + + +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(app, echo_exec, synopsis, descrip); +} + +AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Simple Echo Application"); |