Wed Apr 6 11:29:53 2011

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 = "8586c2a7d357cb591cc3a6607a8f62d1" , .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 103 of file bridge_simple.c.

static void __unreg_module ( void   )  [static]

Definition at line 103 of file bridge_simple.c.

static int load_module ( void   )  [static]

Definition at line 98 of file bridge_simple.c.

References ast_bridge_technology_register, and simple_bridge.

00099 {
00100    return ast_bridge_technology_register(&simple_bridge);
00101 }

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

Definition at line 44 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.

00045 {
00046    struct ast_channel *c0 = AST_LIST_FIRST(&bridge->channels)->chan, *c1 = AST_LIST_LAST(&bridge->channels)->chan;
00047 
00048    /* If this is the first channel we can't make it compatible... unless we make it compatible with itself O.o */
00049    if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) {
00050       return 0;
00051    }
00052 
00053    /* See if we need to make these compatible */
00054    if (((c0->writeformat == c1->readformat) && (c0->readformat == c1->writeformat) && (c0->nativeformats == c1->nativeformats))) {
00055       return 0;
00056    }
00057 
00058    /* BOOM! We do. */
00059    return ast_channel_make_compatible(c0, c1);
00060 }

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 62 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.

00063 {
00064    struct ast_bridge_channel *other = NULL;
00065 
00066    /* If this is the only channel in this bridge then immediately exit */
00067    if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) {
00068       return AST_BRIDGE_WRITE_FAILED;
00069    }
00070 
00071    /* Find the channel we actually want to write to */
00072    if (!(other = (AST_LIST_FIRST(&bridge->channels) == bridge_channel ? AST_LIST_LAST(&bridge->channels) : AST_LIST_FIRST(&bridge->channels)))) {
00073       return AST_BRIDGE_WRITE_FAILED;
00074    }
00075 
00076    /* 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 */
00077    if (other->state == AST_BRIDGE_CHANNEL_STATE_WAIT) {
00078       ast_write(other->chan, frame);
00079    }
00080 
00081    return AST_BRIDGE_WRITE_SUCCESS;
00082 }

static int unload_module ( void   )  [static]

Definition at line 93 of file bridge_simple.c.

References ast_bridge_technology_unregister(), and simple_bridge.

00094 {
00095    return ast_bridge_technology_unregister(&simple_bridge);
00096 }


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 = "8586c2a7d357cb591cc3a6607a8f62d1" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, } [static]

Definition at line 103 of file bridge_simple.c.

struct ast_module_info* ast_module_info = &__mod_info [static]

Definition at line 103 of file bridge_simple.c.

struct ast_bridge_technology simple_bridge [static]

Definition at line 84 of file bridge_simple.c.

Referenced by load_module(), and unload_module().


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