chan_bridge_media.c File Reference

Bridge Media Channels driver. More...

#include "asterisk.h"
#include "asterisk/channel.h"
#include "asterisk/bridge.h"
#include "asterisk/core_unreal.h"
#include "asterisk/module.h"

Include dependency graph for chan_bridge_media.c:

Go to the source code of this file.

Functions
static void	__reg_module (void)
static void	__unreg_module (void)
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)
struct ast_module *	AST_MODULE_SELF_SYM (void)
static void	cleanup_capabilities (void)
static int	load_module (void)
static int	media_call (struct ast_channel *chan, const char *addr, int timeout)
static int	media_hangup (struct ast_channel *ast)
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)
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 int	unload_module (void)

Variables
static struct ast_module_info	__mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Bridge Media Channel Driver" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, }
static struct ast_channel_tech	announce_tech
static const struct ast_module_info *	ast_module_info = &__mod_info
static struct ast_channel_tech	record_tech

Detailed Description

Bridge Media Channels driver.

Author

Jonathan Rose jrose.nosp@m.@dig.nosp@m.ium.c.nosp@m.om

Richard Mudgett rmudg.nosp@m.ett@.nosp@m.digiu.nosp@m.m.co.nosp@m.m

Bridge Media Channels

Definition in file chan_bridge_media.c.

Function Documentation

__reg_module()

static void __reg_module ( void  )

static

Definition at line 219 of file chan_bridge_media.c.

__unreg_module()

static void __unreg_module ( void  )

static

Definition at line 219 of file chan_bridge_media.c.

announce_request()

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

Definition at line 150 of file chan_bridge_media.c.

{
    return media_request_helper(cap, assignedids, requestor, data, &announce_tech, "announcer");
}

References announce_tech, ast_channel::data, and media_request_helper().

AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM

(

void

)

Definition at line 219 of file chan_bridge_media.c.

cleanup_capabilities()

static void cleanup_capabilities ( void  )

static

Definition at line 162 of file chan_bridge_media.c.

{
    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;
    }
}

References announce_tech, ao2_ref, ast_channel_tech::capabilities, NULL, and record_tech.

Referenced by load_module(), and unload_module().

load_module()

static int load_module ( void  )

static

Definition at line 183 of file chan_bridge_media.c.

{
    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;
}

References announce_tech, ast_channel_register(), ast_format_cap_alloc, ast_format_cap_append_by_type(), AST_FORMAT_CAP_FLAG_DEFAULT, ast_log, AST_MEDIA_TYPE_UNKNOWN, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_channel_tech::capabilities, cleanup_capabilities(), ast_channel_tech::description, LOG_ERROR, record_tech, and ast_channel_tech::type.

media_call()

static int media_call ( struct ast_channel *  chan, const char *  addr, int  timeout  )

static

Definition at line 42 of file chan_bridge_media.c.

{
    /* ast_call() will fail unconditionally against channels provided by this driver */
    return -1;
}

media_hangup()

static int media_hangup ( struct ast_channel *  ast )

static

Definition at line 48 of file chan_bridge_media.c.

{
    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;
}

References ao2_ref, ast_channel_tech_pvt(), and ast_unreal_hangup().

media_request_helper()

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  )

static

Definition at line 115 of file chan_bridge_media.c.

{
    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;
}

References ao2_cleanup, ast_answer(), ast_channel_add_bridge_role(), ast_copy_string(), ast_hangup(), ast_read_threadstorage_callid(), ast_set_flag, AST_STATE_UP, ast_unreal_alloc(), ast_unreal_destructor(), ast_unreal_new_channels(), AST_UNREAL_NO_OPTIMIZATION, ast_channel::callid, ast_channel::data, NULL, RAII_VAR, and ast_channel::tech.

Referenced by announce_request(), and record_request().

record_request()

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

Definition at line 156 of file chan_bridge_media.c.

{
    return media_request_helper(cap, assignedids, requestor, data, &record_tech, "recorder");
}

References ast_channel::data, media_request_helper(), and record_tech.

unload_module()

static int unload_module ( void  )

static

Definition at line 175 of file chan_bridge_media.c.

{
    ast_channel_unregister(&announce_tech);
    ast_channel_unregister(&record_tech);
    cleanup_capabilities();
    return 0;
}

References announce_tech, ast_channel_unregister(), cleanup_capabilities(), and record_tech.

Variable Documentation

__mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Bridge Media Channel Driver" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, }

static

Definition at line 219 of file chan_bridge_media.c.

announce_tech

struct ast_channel_tech announce_tech

static

Definition at line 71 of file chan_bridge_media.c.

Referenced by announce_request(), cleanup_capabilities(), load_module(), and unload_module().

ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info

static

Definition at line 219 of file chan_bridge_media.c.

record_tech

struct ast_channel_tech record_tech

static

Definition at line 93 of file chan_bridge_media.c.

Referenced by cleanup_capabilities(), load_module(), record_request(), and unload_module().