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.
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 = ASTERISK_GPL_KEY , .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_decoder_pvt::g722, g722_decode_init(), and ast_trans_pvt::pvt.

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_decoder_pvt::g722, g722_decode(), ast_trans_pvt::i16, ast_trans_pvt::outbuf, ast_frame::ptr, ast_trans_pvt::pvt, ast_frame::samples, and ast_trans_pvt::samples.

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_decoder_pvt::g722, g722_decode_init(), G722_SAMPLE_RATE_8000, and ast_trans_pvt::pvt.

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_encoder_pvt::g722, g722_encode_init(), and ast_trans_pvt::pvt.

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_encoder_pvt::g722, g722_encode(), ast_trans_pvt::outbuf, ast_frame::ptr, ast_trans_pvt::pvt, ast_frame::samples, ast_trans_pvt::samples, 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_encoder_pvt::g722, g722_encode_init(), G722_SAMPLE_RATE_8000, and ast_trans_pvt::pvt.

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 = ASTERISK_GPL_KEY , .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.

                                         {
    .name = "g722tolin",
    .src_codec = {
        .name = "g722",
        .type = AST_MEDIA_TYPE_AUDIO,
        .sample_rate = 16000,
    },
    .dst_codec = {
        .name = "slin",
        .type = AST_MEDIA_TYPE_AUDIO,
        .sample_rate = 8000,
    },
    .format = "slin",
    .newpvt = g722tolin_new,    /* same for both directions */
    .framein = g722tolin_framein,
    .sample = g722_sample,
    .desc_size = sizeof(struct g722_decoder_pvt),
    .buffer_samples = BUFFER_SAMPLES / sizeof(int16_t),
    .buf_size = BUFFER_SAMPLES,
};

Referenced by load_module(), and unload_module().

g722tolin16

struct ast_translator g722tolin16

static

Definition at line 179 of file codec_g722.c.

                                           {
    .name = "g722tolin16",
    .src_codec = {
        .name = "g722",
        .type = AST_MEDIA_TYPE_AUDIO,
        .sample_rate = 16000,
    },
    .dst_codec = {
        .name = "slin",
        .type = AST_MEDIA_TYPE_AUDIO,
        .sample_rate = 16000,
    },
    .format = "slin16",
    .newpvt = g722tolin16_new,  /* same for both directions */
    .framein = g722tolin_framein,
    .sample = g722_sample,
    .desc_size = sizeof(struct g722_decoder_pvt),
    .buffer_samples = BUFFER_SAMPLES / sizeof(int16_t),
    .buf_size = BUFFER_SAMPLES,
};

Referenced by load_module(), and unload_module().

lin16tog722

struct ast_translator lin16tog722

static

Definition at line 200 of file codec_g722.c.

                                           {
    .name = "lin16tog722",
    .src_codec = {
        .name = "slin",
        .type = AST_MEDIA_TYPE_AUDIO,
        .sample_rate = 16000,
    },
    .dst_codec = {
        .name = "g722",
        .type = AST_MEDIA_TYPE_AUDIO,
        .sample_rate = 16000,
    },
    .format = "g722",
    .newpvt = lin16tog722_new,  /* same for both directions */
    .framein = lintog722_framein,
    .sample = slin16_sample,
    .desc_size = sizeof(struct g722_encoder_pvt),
    .buffer_samples = BUFFER_SAMPLES * 2,
    .buf_size = BUFFER_SAMPLES,
};

Referenced by load_module(), and unload_module().

lintog722

struct ast_translator lintog722

static

Definition at line 158 of file codec_g722.c.

                                         {
    .name = "lintog722",
    .src_codec = {
        .name = "slin",
        .type = AST_MEDIA_TYPE_AUDIO,
        .sample_rate = 8000,
    },
    .dst_codec = {
        .name = "g722",
        .type = AST_MEDIA_TYPE_AUDIO,
        .sample_rate = 16000,
    },
    .format = "g722",
    .newpvt = lintog722_new,    /* same for both directions */
    .framein = lintog722_framein,
    .sample = slin8_sample,
    .desc_size = sizeof(struct g722_encoder_pvt),
    .buffer_samples = BUFFER_SAMPLES * 2,
    .buf_size = BUFFER_SAMPLES,
};

Referenced by load_module(), and unload_module().