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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2013 Digium, Inc.
*
* Jonathan Rose <jrose@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 Bridge Media Channels driver
*
* \author Jonathan Rose <jrose@digium.com>
* \author Richard Mudgett <rmudgett@digium.com>
*
* \brief Bridge Media Channels
*
* \ingroup channel_drivers
*/
/*** MODULEINFO
<support_level>core</support_level>
***/
#include "asterisk.h"
#include "asterisk/channel.h"
#include "asterisk/bridge.h"
#include "asterisk/core_unreal.h"
#include "asterisk/module.h"
static int media_call(struct ast_channel *chan, const char *addr, int timeout)
{
/* ast_call() will fail unconditionally against channels provided by this driver */
return -1;
}
static int media_hangup(struct ast_channel *ast)
{
struct ast_unreal_pvt *p = ast_channel_tech_pvt(ast);
int res;
if (!p) {
return -1;
}
/* Give the pvt a ref to fulfill calling requirements. */
ao2_ref(p, +1);
res = ast_unreal_hangup(p, ast);
ao2_ref(p, -1);
return res;
}
static struct ast_channel *announce_request(const char *type, struct ast_format_cap *cap,
const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *data, int *cause);
static struct ast_channel *record_request(const char *type, struct ast_format_cap *cap,
const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *data, int *cause);
static struct ast_channel_tech announce_tech = {
.type = "Announcer",
.description = "Bridge Media Announcing Channel Driver",
.requester = announce_request,
.call = media_call,
.hangup = media_hangup,
.send_digit_begin = ast_unreal_digit_begin,
.send_digit_end = ast_unreal_digit_end,
.read = ast_unreal_read,
.write = ast_unreal_write,
.write_video = ast_unreal_write,
.exception = ast_unreal_read,
.indicate = ast_unreal_indicate,
.fixup = ast_unreal_fixup,
.send_html = ast_unreal_sendhtml,
.send_text = ast_unreal_sendtext,
.queryoption = ast_unreal_queryoption,
.setoption = ast_unreal_setoption,
.properties = AST_CHAN_TP_INTERNAL,
};
static struct ast_channel_tech record_tech = {
.type = "Recorder",
.description = "Bridge Media Recording Channel Driver",
.requester = record_request,
.call = media_call,
.hangup = media_hangup,
.send_digit_begin = ast_unreal_digit_begin,
.send_digit_end = ast_unreal_digit_end,
.read = ast_unreal_read,
.write = ast_unreal_write,
.write_video = ast_unreal_write,
.exception = ast_unreal_read,
.indicate = ast_unreal_indicate,
.fixup = ast_unreal_fixup,
.send_html = ast_unreal_sendhtml,
.send_text = ast_unreal_sendtext,
.queryoption = ast_unreal_queryoption,
.setoption = ast_unreal_setoption,
.properties = AST_CHAN_TP_INTERNAL,
};
static struct ast_channel *media_request_helper(struct ast_format_cap *cap, const struct ast_assigned_ids *assignedids,
const struct ast_channel *requestor, const char *data, struct ast_channel_tech *tech, const char *role)
{
struct ast_channel *chan;
ast_callid callid;
RAII_VAR(struct ast_unreal_pvt *, pvt, NULL, ao2_cleanup);
if (!(pvt = ast_unreal_alloc(sizeof(*pvt), ast_unreal_destructor, cap))) {
return NULL;
}
ast_copy_string(pvt->name, data, sizeof(pvt->name));
ast_set_flag(pvt, AST_UNREAL_NO_OPTIMIZATION);
callid = ast_read_threadstorage_callid();
chan = ast_unreal_new_channels(pvt, tech,
AST_STATE_UP, AST_STATE_UP, NULL, NULL, assignedids, requestor, callid);
if (!chan) {
return NULL;
}
ast_answer(pvt->owner);
ast_answer(pvt->chan);
if (ast_channel_add_bridge_role(pvt->chan, role)) {
ast_hangup(chan);
return NULL;
}
return chan;
}
static struct ast_channel *announce_request(const char *type, struct ast_format_cap *cap,
const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *data, int *cause)
{
return media_request_helper(cap, assignedids, requestor, data, &announce_tech, "announcer");
}
static struct ast_channel *record_request(const char *type, struct ast_format_cap *cap,
const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *data, int *cause)
{
return media_request_helper(cap, assignedids, requestor, data, &record_tech, "recorder");
}
static void cleanup_capabilities(void)
{
if (announce_tech.capabilities) {
ao2_ref(announce_tech.capabilities, -1);
announce_tech.capabilities = NULL;
}
if (record_tech.capabilities) {
ao2_ref(record_tech.capabilities, -1);
record_tech.capabilities = NULL;
}
}
static int unload_module(void)
{
ast_channel_unregister(&announce_tech);
ast_channel_unregister(&record_tech);
cleanup_capabilities();
return 0;
}
static int load_module(void)
{
announce_tech.capabilities = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
if (!announce_tech.capabilities) {
return AST_MODULE_LOAD_DECLINE;
}
record_tech.capabilities = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
if (!record_tech.capabilities) {
return AST_MODULE_LOAD_DECLINE;
}
ast_format_cap_append_by_type(announce_tech.capabilities, AST_MEDIA_TYPE_UNKNOWN);
ast_format_cap_append_by_type(record_tech.capabilities, AST_MEDIA_TYPE_UNKNOWN);
if (ast_channel_register(&announce_tech)) {
ast_log(LOG_ERROR, "Unable to register channel technology %s(%s).\n",
announce_tech.type, announce_tech.description);
cleanup_capabilities();
return AST_MODULE_LOAD_DECLINE;
}
if (ast_channel_register(&record_tech)) {
ast_log(LOG_ERROR, "Unable to register channel technology %s(%s).\n",
record_tech.type, record_tech.description);
cleanup_capabilities();
return AST_MODULE_LOAD_DECLINE;
}
return AST_MODULE_LOAD_SUCCESS;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Bridge Media Channel Driver",
.support_level = AST_MODULE_SUPPORT_CORE,
.load = load_module,
.unload = unload_module,
);
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