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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2016, Digium, Inc.
*
* Joshua Colp <jcolp@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 Siren7 format attribute interface
*
* \author Joshua Colp <jcolp@digium.com>
*/
/*** MODULEINFO
<support_level>core</support_level>
***/
#include "asterisk.h"
#include "asterisk/module.h"
#include "asterisk/format.h"
/* Destroy is a required callback and must exist */
static void siren7_destroy(struct ast_format *format)
{
}
/* Clone is a required callback and must exist */
static int siren7_clone(const struct ast_format *src, struct ast_format *dst)
{
return 0;
}
static struct ast_format *siren7_parse_sdp_fmtp(const struct ast_format *format, const char *attributes)
{
unsigned int val;
if (sscanf(attributes, "bitrate=%30u", &val) == 1) {
if (val != 32000) {
ast_log(LOG_WARNING, "Got Siren7 offer at %u bps, but only 32000 bps supported; ignoring.\n", val);
return NULL;
}
}
/* We aren't modifying the format and once passed back it won't be touched, so use what we were given */
return ao2_bump((struct ast_format *)format);
}
static void siren7_generate_sdp_fmtp(const struct ast_format *format, unsigned int payload, struct ast_str **str)
{
ast_str_append(str, 0, "a=fmtp:%u bitrate=32000\r\n", payload);
}
static struct ast_format_interface siren7_interface = {
.format_destroy = siren7_destroy,
.format_clone = siren7_clone,
.format_parse_sdp_fmtp = siren7_parse_sdp_fmtp,
.format_generate_sdp_fmtp = siren7_generate_sdp_fmtp,
};
static int load_module(void)
{
if (ast_format_interface_register("siren7", &siren7_interface)) {
return AST_MODULE_LOAD_DECLINE;
}
return AST_MODULE_LOAD_SUCCESS;
}
static int unload_module(void)
{
return 0;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Siren7 Format Attribute Module",
.support_level = AST_MODULE_SUPPORT_CORE,
.load = load_module,
.unload = unload_module,
.load_pri = AST_MODPRI_CHANNEL_DEPEND,
);