codec_g722.c File Reference

codec_g722.c - translate between signed linear and ITU G.722-64kbps More...

#include "asterisk.h"
#include "asterisk/linkedlists.h"
#include "asterisk/module.h"
#include "asterisk/config.h"
#include "asterisk/translate.h"
#include "asterisk/utils.h"
#include "g722/g722.h"
#include "asterisk/slin.h"
#include "ex_g722.h"

Include dependency graph for codec_g722.c:

Go to the source code of this file.

Data Structures
struct	g722_decoder_pvt
struct	g722_encoder_pvt

Macros
#define	BUF_SHIFT   5
#define	BUFFER_SAMPLES   8096 /* size for the translation buffers */

Functions
static void	__reg_module (void)
static void	__unreg_module (void)
struct ast_module *	AST_MODULE_SELF_SYM (void)
static int	g722tolin16_new (struct ast_trans_pvt *pvt)
static int	g722tolin_framein (struct ast_trans_pvt *pvt, struct ast_frame *f)
static int	g722tolin_new (struct ast_trans_pvt *pvt)
	init a new instance of g722_encoder_pvt. More...
static int	lin16tog722_new (struct ast_trans_pvt *pvt)
static int	lintog722_framein (struct ast_trans_pvt *pvt, struct ast_frame *f)
static int	lintog722_new (struct ast_trans_pvt *pvt)
	init a new instance of g722_encoder_pvt. More...
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 = "ITU G.722-64kbps G722 Transcoder" , .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, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, }
static const struct ast_module_info *	ast_module_info = &__mod_info
static struct ast_translator	g722tolin
static struct ast_translator	g722tolin16
static struct ast_translator	lin16tog722
static struct ast_translator	lintog722

Detailed Description

codec_g722.c - translate between signed linear and ITU G.722-64kbps

Author

Matthew Fredrickson cresl.nosp@m.in@d.nosp@m.igium.nosp@m..com

Russell Bryant russe.nosp@m.ll@d.nosp@m.igium.nosp@m..com

• http://soft-switch.org/downloads/non-gpl-bits.tgz
• http://lists.digium.com/pipermail/asterisk-dev/2006-September/022866.html

Definition in file codec_g722.c.

Macro Definition Documentation

BUF_SHIFT

#define BUF_SHIFT   5

Definition at line 49 of file codec_g722.c.

BUFFER_SAMPLES

#define BUFFER_SAMPLES   8096 /* size for the translation buffers */

Definition at line 48 of file codec_g722.c.

Function Documentation

__reg_module()

static void __reg_module ( void  )

static

Definition at line 254 of file codec_g722.c.

__unreg_module()

static void __unreg_module ( void  )

static

Definition at line 254 of file codec_g722.c.

AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM

(

void

)

Definition at line 254 of file codec_g722.c.

g722tolin16_new()

static int g722tolin16_new ( struct ast_trans_pvt *  pvt )

static

Definition at line 94 of file codec_g722.c.

{
    struct g722_decoder_pvt *tmp = pvt->pvt;
 
    g722_decode_init(&tmp->g722, 64000, 0);
 
    return 0;
}

References g722_decode_init(), ast_trans_pvt::pvt, and tmp().

g722tolin_framein()

static int g722tolin_framein ( struct ast_trans_pvt *  pvt, struct ast_frame *  f  )

static

Definition at line 103 of file codec_g722.c.

{
    struct g722_decoder_pvt *tmp = pvt->pvt;
    int out_samples;
    int in_samples;
 
    /* g722_decode expects the samples to be in the invalid samples / 2 format */
    in_samples = f->samples / 2;
 
    out_samples = g722_decode(&tmp->g722, &pvt->outbuf.i16[pvt->samples * sizeof(int16_t)],
        (uint8_t *) f->data.ptr, in_samples);
 
    pvt->samples += out_samples;
 
    pvt->datalen += (out_samples * sizeof(int16_t));
 
    return 0;
}

References ast_frame::data, ast_trans_pvt::datalen, g722_decode(), ast_trans_pvt::i16, ast_trans_pvt::outbuf, ast_frame::ptr, ast_trans_pvt::pvt, ast_frame::samples, ast_trans_pvt::samples, and tmp().

g722tolin_new()

static int g722tolin_new ( struct ast_trans_pvt *  pvt )

static

init a new instance of g722_encoder_pvt.

Definition at line 85 of file codec_g722.c.

{
    struct g722_decoder_pvt *tmp = pvt->pvt;
 
    g722_decode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000);
 
    return 0;
}

References g722_decode_init(), G722_SAMPLE_RATE_8000, ast_trans_pvt::pvt, and tmp().

lin16tog722_new()

static int lin16tog722_new ( struct ast_trans_pvt *  pvt )

static

Definition at line 75 of file codec_g722.c.

{
    struct g722_encoder_pvt *tmp = pvt->pvt;
 
    g722_encode_init(&tmp->g722, 64000, 0);
 
    return 0;
}

References g722_encode_init(), ast_trans_pvt::pvt, and tmp().

lintog722_framein()

static int lintog722_framein ( struct ast_trans_pvt *  pvt, struct ast_frame *  f  )

static

Definition at line 122 of file codec_g722.c.

{
    struct g722_encoder_pvt *tmp = pvt->pvt;
    int outlen;
 
    outlen = g722_encode(&tmp->g722, (&pvt->outbuf.ui8[pvt->datalen]),
        (int16_t *) f->data.ptr, f->samples);
 
    pvt->samples += outlen * 2;
 
    pvt->datalen += outlen;
 
    return 0;
}

References ast_frame::data, ast_trans_pvt::datalen, g722_encode(), ast_trans_pvt::outbuf, ast_frame::ptr, ast_trans_pvt::pvt, ast_frame::samples, ast_trans_pvt::samples, tmp(), and ast_trans_pvt::ui8.

lintog722_new()

static int lintog722_new ( struct ast_trans_pvt *  pvt )

static

init a new instance of g722_encoder_pvt.

Definition at line 66 of file codec_g722.c.

{
    struct g722_encoder_pvt *tmp = pvt->pvt;
 
    g722_encode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000);
 
    return 0;
}

References g722_encode_init(), G722_SAMPLE_RATE_8000, ast_trans_pvt::pvt, and tmp().

load_module()

static int load_module ( void  )

static

Definition at line 233 of file codec_g722.c.

{
    int res = 0;
 
    res |= ast_register_translator(&g722tolin);
    res |= ast_register_translator(&lintog722);
    res |= ast_register_translator(&g722tolin16);
    res |= ast_register_translator(&lin16tog722);
 
    if (res) {
        unload_module();
        return AST_MODULE_LOAD_DECLINE;
    }
 
    return AST_MODULE_LOAD_SUCCESS;
}

References AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_register_translator, g722tolin, g722tolin16, lin16tog722, lintog722, and unload_module().

unload_module()

static int unload_module ( void  )

static

Definition at line 221 of file codec_g722.c.

{
    int res = 0;
 
    res |= ast_unregister_translator(&g722tolin);
    res |= ast_unregister_translator(&lintog722);
    res |= ast_unregister_translator(&g722tolin16);
    res |= ast_unregister_translator(&lin16tog722);
 
    return res;
}

References ast_unregister_translator(), g722tolin, g722tolin16, lin16tog722, and lintog722.

Referenced by load_module().

Variable Documentation

__mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "ITU G.722-64kbps G722 Transcoder" , .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, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, }

static

Definition at line 254 of file codec_g722.c.

ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info

static

Definition at line 254 of file codec_g722.c.

g722tolin

struct ast_translator g722tolin

static

Definition at line 137 of file codec_g722.c.

Referenced by load_module(), and unload_module().

g722tolin16

struct ast_translator g722tolin16

static

Definition at line 179 of file codec_g722.c.

Referenced by load_module(), and unload_module().

lin16tog722

struct ast_translator lin16tog722

static

Definition at line 200 of file codec_g722.c.

Referenced by load_module(), and unload_module().

lintog722

struct ast_translator lintog722

static

Definition at line 158 of file codec_g722.c.

Referenced by load_module(), and unload_module().