Wed Apr 6 11:29:49 2011

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"

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, const char *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_LOAD_ORDER , .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 = "8586c2a7d357cb591cc3a6607a8f62d1" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, }
static const 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,
const char *  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(), f, format, and ast_channel::nativeformats.

Referenced by load_module().

00052 {
00053    int res = -1;
00054    format_t format;
00055 
00056    format = ast_best_codec(chan->nativeformats);
00057    ast_set_write_format(chan, format);
00058    ast_set_read_format(chan, format);
00059 
00060    while (ast_waitfor(chan, -1) > -1) {
00061       struct ast_frame *f = ast_read(chan);
00062       if (!f) {
00063          break;
00064       }
00065       f->delivery.tv_sec = 0;
00066       f->delivery.tv_usec = 0;
00067       if (ast_write(chan, f)) {
00068          ast_frfree(f);
00069          goto end;
00070       }
00071       if ((f->frametype == AST_FRAME_DTMF) && (f->subclass.integer == '#')) {
00072          res = 0;
00073          ast_frfree(f);
00074          goto end;
00075       }
00076       ast_frfree(f);
00077    }
00078 end:
00079    return res;
00080 }

static int load_module ( void   )  [static]

Definition at line 87 of file app_echo.c.

References ast_register_application_xml, and echo_exec().

00088 {
00089    return ast_register_application_xml(app, echo_exec);
00090 }

static int unload_module ( void   )  [static]

Definition at line 82 of file app_echo.c.

References ast_unregister_application().

00083 {
00084    return ast_unregister_application(app);
00085 }


Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .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 = "8586c2a7d357cb591cc3a6607a8f62d1" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, } [static]

Definition at line 92 of file app_echo.c.

const char app[] = "Echo" [static]

Definition at line 49 of file app_echo.c.

struct ast_module_info* ast_module_info = &__mod_info [static]

Definition at line 92 of file app_echo.c.


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