Asterisk - The Open Source Telephony Project  21.4.1
Data Structures | Macros | Functions | Variables
codec_codec2.c File Reference

Translate between signed linear and Codec 2. More...

#include "asterisk.h"
#include "asterisk/codec.h"
#include "asterisk/frame.h"
#include "asterisk/linkedlists.h"
#include "asterisk/logger.h"
#include "asterisk/module.h"
#include "asterisk/rtp_engine.h"
#include "asterisk/translate.h"
#include <codec2/codec2.h>
#include "asterisk/slin.h"
#include "ex_codec2.h"

Go to the source code of this file.

Data Structures

struct  codec2_translator_pvt
 

Macros

#define BUFFER_SAMPLES   8000
 
#define CODEC2_FRAME_LEN   6 /* consider codec2_bits_per_frame(.) */
 
#define CODEC2_SAMPLES   160 /* consider codec2_samples_per_frame(.) */
 

Functions

static void __reg_module (void)
 
static void __unreg_module (void)
 
struct ast_moduleAST_MODULE_SELF_SYM (void)
 
static void codec2_destroy_stuff (struct ast_trans_pvt *pvt)
 
static int codec2_new (struct ast_trans_pvt *pvt)
 
static int codec2tolin_framein (struct ast_trans_pvt *pvt, struct ast_frame *f)
 decode and store in outbuf.
 
static int lintocodec2_framein (struct ast_trans_pvt *pvt, struct ast_frame *f)
 store samples into working buffer for later decode
 
static struct ast_framelintocodec2_frameout (struct ast_trans_pvt *pvt)
 encode and produce a frame
 
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 = "Codec 2 Coder/Decoder" , .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 = "da6642af068ee5e6490c5b1d2cc1d238" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, .support_level = AST_MODULE_SUPPORT_CORE, }
 
static const struct ast_module_infoast_module_info = &__mod_info
 
static struct ast_translator codec2tolin
 
static struct ast_translator lintocodec2
 

Detailed Description

Translate between signed linear and Codec 2.

Author
Alexander Traud pabst.nosp@m.raud.nosp@m.@comp.nosp@m.user.nosp@m.ve.co.nosp@m.m
Note
http://www.rowetel.com/codec2.html

Definition in file codec_codec2.c.