Thu Apr 28 2011 17:15:37

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"
Include dependency graph for bridge_simple.c:

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
__MODULE_INFO_SECTION 
__mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Simple two channel bridging module" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, }
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.

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_bridge::channels, ast_channel::nativeformats, ast_channel::readformat, and ast_channel::writeformat.

{
   struct ast_channel *c0 = AST_LIST_FIRST(&bridge->channels)->chan, *c1 = AST_LIST_LAST(&bridge->channels)->chan;

   /* If this is the first channel we can't make it compatible... unless we make it compatible with itself O.o */
   if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) {
      return 0;
   }

   /* See if we need to make these compatible */
   if (((c0->writeformat == c1->readformat) && (c0->readformat == c1->writeformat) && (c0->nativeformats == c1->nativeformats))) {
      return 0;
   }

   /* BOOM! We do. */
   return ast_channel_make_compatible(c0, c1);
}
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::chan, ast_bridge::channels, and ast_bridge_channel::state.

{
   struct ast_bridge_channel *other = NULL;

   /* If this is the only channel in this bridge then immediately exit */
   if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) {
      return AST_BRIDGE_WRITE_FAILED;
   }

   /* Find the channel we actually want to write to */
   if (!(other = (AST_LIST_FIRST(&bridge->channels) == bridge_channel ? AST_LIST_LAST(&bridge->channels) : AST_LIST_FIRST(&bridge->channels)))) {
      return AST_BRIDGE_WRITE_FAILED;
   }

   /* 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 */
   if (other->state == AST_BRIDGE_CHANNEL_STATE_WAIT) {
      ast_write(other->chan, frame);
   }

   return AST_BRIDGE_WRITE_SUCCESS;
}
static int unload_module ( void  ) [static]

Variable Documentation

struct ast_module_info __MODULE_INFO_SECTION __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Simple two channel bridging module" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, } [static]

Definition at line 103 of file bridge_simple.c.

Definition at line 103 of file bridge_simple.c.

Definition at line 84 of file bridge_simple.c.