Sat Mar 10 01:54:47 2012

Asterisk developer's documentation


bridge_simple.c File Reference

Simple two channel bridging module. More...

#include "asterisk.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/bridging.h"
#include "asterisk/bridging_technology.h"
#include "asterisk/frame.h"

Go to the source code of this file.

Functions

static void __reg_module (void)
static void __unreg_module (void)
static int load_module (void)
static int simple_bridge_join (struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
static enum ast_bridge_write_result simple_bridge_write (struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
static int unload_module (void)

Variables

static struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Simple two channel bridging module" , .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 = "88eaa8f5c1bd988bedd71113385e0886" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, }
static struct ast_module_infoast_module_info = &__mod_info
static struct ast_bridge_technology simple_bridge


Detailed Description

Simple two channel bridging module.

Author:
Joshua Colp <jcolp@digium.com>

Definition in file bridge_simple.c.


Function Documentation

static void __reg_module ( void   )  [static]

Definition at line 107 of file bridge_simple.c.

static void __unreg_module ( void   )  [static]

Definition at line 107 of file bridge_simple.c.

static int load_module ( void   )  [static]

Definition at line 102 of file bridge_simple.c.

References ast_bridge_technology_register, and simple_bridge.

00103 {
00104    return ast_bridge_technology_register(&simple_bridge);
00105 }

static int simple_bridge_join ( struct ast_bridge bridge,
struct ast_bridge_channel bridge_channel 
) [static]

Definition at line 48 of file bridge_simple.c.

References ast_channel_make_compatible(), AST_LIST_FIRST, AST_LIST_LAST, ast_channel::bridge, ast_channel::nativeformats, ast_channel::readformat, and ast_channel::writeformat.

00049 {
00050    struct ast_channel *c0 = AST_LIST_FIRST(&bridge->channels)->chan, *c1 = AST_LIST_LAST(&bridge->channels)->chan;
00051 
00052    /* If this is the first channel we can't make it compatible... unless we make it compatible with itself O.o */
00053    if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) {
00054       return 0;
00055    }
00056 
00057    /* See if we need to make these compatible */
00058    if (((c0->writeformat == c1->readformat) && (c0->readformat == c1->writeformat) && (c0->nativeformats == c1->nativeformats))) {
00059       return 0;
00060    }
00061 
00062    /* BOOM! We do. */
00063    return ast_channel_make_compatible(c0, c1);
00064 }

static enum ast_bridge_write_result simple_bridge_write ( struct ast_bridge bridge,
struct ast_bridge_channel bridge_channel,
struct ast_frame frame 
) [static]

Definition at line 66 of file bridge_simple.c.

References AST_BRIDGE_CHANNEL_STATE_WAIT, AST_BRIDGE_WRITE_FAILED, AST_BRIDGE_WRITE_SUCCESS, AST_LIST_FIRST, AST_LIST_LAST, ast_write(), ast_bridge_channel::bridge, ast_bridge_channel::chan, and ast_bridge_channel::state.

00067 {
00068    struct ast_bridge_channel *other = NULL;
00069 
00070    /* If this is the only channel in this bridge then immediately exit */
00071    if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) {
00072       return AST_BRIDGE_WRITE_FAILED;
00073    }
00074 
00075    /* Find the channel we actually want to write to */
00076    if (!(other = (AST_LIST_FIRST(&bridge->channels) == bridge_channel ? AST_LIST_LAST(&bridge->channels) : AST_LIST_FIRST(&bridge->channels)))) {
00077       return AST_BRIDGE_WRITE_FAILED;
00078    }
00079 
00080    /* Write the frame out if they are in the waiting state... don't worry about freeing it, the bridging core will take care of it */
00081    if (other->state == AST_BRIDGE_CHANNEL_STATE_WAIT) {
00082       ast_write(other->chan, frame);
00083    }
00084 
00085    return AST_BRIDGE_WRITE_SUCCESS;
00086 }

static int unload_module ( void   )  [static]

Definition at line 97 of file bridge_simple.c.

References ast_bridge_technology_unregister(), and simple_bridge.

00098 {
00099    return ast_bridge_technology_unregister(&simple_bridge);
00100 }


Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Simple two channel bridging module" , .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 = "88eaa8f5c1bd988bedd71113385e0886" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, } [static]

Definition at line 107 of file bridge_simple.c.

struct ast_module_info* ast_module_info = &__mod_info [static]

Definition at line 107 of file bridge_simple.c.

struct ast_bridge_technology simple_bridge [static]

Definition at line 88 of file bridge_simple.c.

Referenced by load_module(), and unload_module().


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