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

Defines

#define BUF_SHIFT   5
#define BUFFER_SAMPLES   8096

Functions

static void __reg_module (void)
static void __unreg_module (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.
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.
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 struct ast_module_infoast_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 <creslin@digium.com>

Russell Bryant <russell@digium.com>

Definition in file codec_g722.c.


Define Documentation

#define BUF_SHIFT   5

Definition at line 51 of file codec_g722.c.

#define BUFFER_SAMPLES   8096

Definition at line 50 of file codec_g722.c.


Function Documentation

static void __reg_module ( void   )  [static]

Definition at line 256 of file codec_g722.c.

static void __unreg_module ( void   )  [static]

Definition at line 256 of file codec_g722.c.

static int g722tolin16_new ( struct ast_trans_pvt pvt  )  [static]

Definition at line 96 of file codec_g722.c.

References g722_decoder_pvt::g722, g722_decode_init(), ast_trans_pvt::pvt, and tmp().

00097 {
00098    struct g722_decoder_pvt *tmp = pvt->pvt;
00099 
00100    g722_decode_init(&tmp->g722, 64000, 0);
00101 
00102    return 0;
00103 }

static int g722tolin_framein ( struct ast_trans_pvt pvt,
struct ast_frame f 
) [static]

Definition at line 105 of file codec_g722.c.

References ast_frame::data, ast_trans_pvt::datalen, g722_decoder_pvt::g722, g722_decode(), ast_trans_pvt::i16, ast_trans_pvt::outbuf, ast_frame::ptr, ast_trans_pvt::pvt, ast_trans_pvt::samples, ast_frame::samples, and tmp().

00106 {
00107    struct g722_decoder_pvt *tmp = pvt->pvt;
00108    int out_samples;
00109    int in_samples;
00110 
00111    /* g722_decode expects the samples to be in the invalid samples / 2 format */
00112    in_samples = f->samples / 2;
00113 
00114    out_samples = g722_decode(&tmp->g722, &pvt->outbuf.i16[pvt->samples * sizeof(int16_t)], 
00115       (uint8_t *) f->data.ptr, in_samples);
00116 
00117    pvt->samples += out_samples;
00118 
00119    pvt->datalen += (out_samples * sizeof(int16_t));
00120 
00121    return 0;
00122 }

static int g722tolin_new ( struct ast_trans_pvt pvt  )  [static]

init a new instance of g722_encoder_pvt.

Definition at line 87 of file codec_g722.c.

References g722_decoder_pvt::g722, g722_decode_init(), G722_SAMPLE_RATE_8000, ast_trans_pvt::pvt, and tmp().

00088 {
00089    struct g722_decoder_pvt *tmp = pvt->pvt;
00090 
00091    g722_decode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000);
00092 
00093    return 0;
00094 }

static int lin16tog722_new ( struct ast_trans_pvt pvt  )  [static]

Definition at line 77 of file codec_g722.c.

References g722_encoder_pvt::g722, g722_encode_init(), ast_trans_pvt::pvt, and tmp().

00078 {
00079    struct g722_encoder_pvt *tmp = pvt->pvt;
00080 
00081    g722_encode_init(&tmp->g722, 64000, 0);
00082 
00083    return 0;
00084 }

static int lintog722_framein ( struct ast_trans_pvt pvt,
struct ast_frame f 
) [static]

Definition at line 124 of file codec_g722.c.

References ast_frame::data, ast_trans_pvt::datalen, g722_encoder_pvt::g722, g722_encode(), ast_trans_pvt::outbuf, ast_frame::ptr, ast_trans_pvt::pvt, ast_trans_pvt::samples, ast_frame::samples, tmp(), and ast_trans_pvt::ui8.

00125 {
00126    struct g722_encoder_pvt *tmp = pvt->pvt;
00127    int outlen;
00128 
00129    outlen = g722_encode(&tmp->g722, (&pvt->outbuf.ui8[pvt->datalen]), 
00130       (int16_t *) f->data.ptr, f->samples);
00131 
00132    pvt->samples += outlen * 2;
00133 
00134    pvt->datalen += outlen;
00135 
00136    return 0;
00137 }

static int lintog722_new ( struct ast_trans_pvt pvt  )  [static]

init a new instance of g722_encoder_pvt.

Definition at line 68 of file codec_g722.c.

References g722_encoder_pvt::g722, g722_encode_init(), G722_SAMPLE_RATE_8000, ast_trans_pvt::pvt, and tmp().

00069 {
00070    struct g722_encoder_pvt *tmp = pvt->pvt;
00071 
00072    g722_encode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000);
00073 
00074    return 0;
00075 }

static int load_module ( void   )  [static]

Definition at line 235 of file codec_g722.c.

References AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, ast_register_translator, and unload_module.

00236 {
00237    int res = 0;
00238 
00239    res |= ast_register_translator(&g722tolin);
00240    res |= ast_register_translator(&lintog722);
00241    res |= ast_register_translator(&g722tolin16);
00242    res |= ast_register_translator(&lin16tog722);
00243 
00244    if (res) {
00245       unload_module();
00246       return AST_MODULE_LOAD_FAILURE;
00247    }  
00248 
00249    return AST_MODULE_LOAD_SUCCESS;
00250 }

static int unload_module ( void   )  [static]

Definition at line 223 of file codec_g722.c.

References ast_unregister_translator().

00224 {
00225    int res = 0;
00226 
00227    res |= ast_unregister_translator(&g722tolin);
00228    res |= ast_unregister_translator(&lintog722);
00229    res |= ast_unregister_translator(&g722tolin16);
00230    res |= ast_unregister_translator(&lin16tog722);
00231 
00232    return res;
00233 }


Variable Documentation

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 256 of file codec_g722.c.

Definition at line 256 of file codec_g722.c.

struct ast_translator g722tolin [static]

Definition at line 139 of file codec_g722.c.

struct ast_translator g722tolin16 [static]

Definition at line 181 of file codec_g722.c.

struct ast_translator lin16tog722 [static]

Definition at line 202 of file codec_g722.c.

struct ast_translator lintog722 [static]

Definition at line 160 of file codec_g722.c.


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