Fri Jul 15 2011 11:58:57

Asterisk developer's documentation


app_echo.c File Reference

Echo application -- play back what you hear to evaluate latency. More...

#include "asterisk.h"
#include "asterisk/file.h"
#include "asterisk/module.h"
#include "asterisk/channel.h"
Include dependency graph for app_echo.c:

Go to the source code of this file.

Functions

static void __reg_module (void)
static void __unreg_module (void)
static int echo_exec (struct ast_channel *chan, void *data)
static int load_module (void)
static int unload_module (void)

Variables

static struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Simple Echo Application" , .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, .load = load_module, .unload = unload_module, }
static char * app = "Echo"
static struct ast_module_infoast_module_info = &__mod_info

Detailed Description

Echo application -- play back what you hear to evaluate latency.

Author:
Mark Spencer <markster@digium.com>

Definition in file app_echo.c.


Function Documentation

static void __reg_module ( void  ) [static]

Definition at line 92 of file app_echo.c.

static void __unreg_module ( void  ) [static]

Definition at line 92 of file app_echo.c.

static int echo_exec ( struct ast_channel chan,
void *  data 
) [static]

Definition at line 51 of file app_echo.c.

References ast_best_codec(), AST_FRAME_DTMF, ast_frfree, ast_read(), ast_set_read_format(), ast_set_write_format(), ast_waitfor(), ast_write(), ast_frame::delivery, f, format, ast_frame::frametype, ast_channel::nativeformats, and ast_frame::subclass.

Referenced by load_module().

{
   int res = -1;
   int format;

   format = ast_best_codec(chan->nativeformats);
   ast_set_write_format(chan, format);
   ast_set_read_format(chan, format);

   while (ast_waitfor(chan, -1) > -1) {
      struct ast_frame *f = ast_read(chan);
      if (!f) {
         break;
      }
      f->delivery.tv_sec = 0;
      f->delivery.tv_usec = 0;
      if (ast_write(chan, f)) {
         ast_frfree(f);
         goto end;
      }
      if ((f->frametype == AST_FRAME_DTMF) && (f->subclass == '#')) {
         res = 0;
         ast_frfree(f);
         goto end;
      }
      ast_frfree(f);
   }
end:
   return res;
}
static int load_module ( void  ) [static]

Definition at line 87 of file app_echo.c.

References ast_register_application_xml, and echo_exec().

static int unload_module ( void  ) [static]

Definition at line 82 of file app_echo.c.

References ast_unregister_application().


Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Simple Echo Application" , .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, .load = load_module, .unload = unload_module, } [static]

Definition at line 92 of file app_echo.c.

char* app = "Echo" [static]

Definition at line 49 of file app_echo.c.

Definition at line 92 of file app_echo.c.