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	reload (void)
static int	unload_module (void)
Variables
static struct ast_module_info __MODULE_INFO_SECTION	__mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "ITU G.722-64kbps G722 Transcoder" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .reload = reload, }
static 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 <creslin@digium.com>; Russell Bryant <russell@digium.com>

Definition in file codec_g722.c.

Define Documentation

#define BUF_SHIFT 5

Definition at line 47 of file codec_g722.c.

#define BUFFER_SAMPLES 8096

Definition at line 46 of file codec_g722.c.

Function Documentation

static void __reg_module ( void ) [static]

Definition at line 221 of file codec_g722.c.

static void __unreg_module ( void ) [static]

Definition at line 221 of file codec_g722.c.

static int g722tolin16_new ( struct ast_trans_pvt * pvt ) [static]

Definition at line 92 of file codec_g722.c.

References g722_decoder_pvt::g722, and ast_trans_pvt::pvt.

{
   struct g722_decoder_pvt *tmp = pvt->pvt;

   g722_decode_init(&tmp->g722, 64000, 0);

   return 0;
}

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

Definition at line 101 of file codec_g722.c.

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

{
   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;
}

static int g722tolin_new ( struct ast_trans_pvt * pvt ) [static]

init a new instance of g722_encoder_pvt.

Definition at line 83 of file codec_g722.c.

References g722_decoder_pvt::g722, and ast_trans_pvt::pvt.

{
   struct g722_decoder_pvt *tmp = pvt->pvt;

   g722_decode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000);

   return 0;
}

static int lin16tog722_new ( struct ast_trans_pvt * pvt ) [static]

Definition at line 73 of file codec_g722.c.

References g722_encoder_pvt::g722, and ast_trans_pvt::pvt.

{
   struct g722_encoder_pvt *tmp = pvt->pvt;

   g722_encode_init(&tmp->g722, 64000, 0);

   return 0;
}

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

Definition at line 120 of file codec_g722.c.

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

{
   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;
}

static int lintog722_new ( struct ast_trans_pvt * pvt ) [static]

init a new instance of g722_encoder_pvt.

Definition at line 64 of file codec_g722.c.

References g722_encoder_pvt::g722, and ast_trans_pvt::pvt.

{
   struct g722_encoder_pvt *tmp = pvt->pvt;

   g722_encode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000);

   return 0;
}

static int load_module ( void ) [static]

Definition at line 200 of file codec_g722.c.

References AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, ast_register_translator, and unload_module().

{
   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_FAILURE;
   }  

   return AST_MODULE_LOAD_SUCCESS;
}

static int reload ( void ) [static]

Definition at line 183 of file codec_g722.c.

References AST_MODULE_LOAD_SUCCESS.

{
   return AST_MODULE_LOAD_SUCCESS;
}

static int unload_module ( void ) [static]

Definition at line 188 of file codec_g722.c.

References ast_unregister_translator().

Referenced by load_module().

{
   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;
}

Variable Documentation

struct ast_module_info __MODULE_INFO_SECTION __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "ITU G.722-64kbps G722 Transcoder" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .reload = reload, } [static]

Definition at line 221 of file codec_g722.c.

struct ast_module_info* ast_module_info = &__mod_info [static]

Definition at line 221 of file codec_g722.c.

struct ast_translator g722tolin [static]

Definition at line 135 of file codec_g722.c.

struct ast_translator g722tolin16 [static]

Definition at line 159 of file codec_g722.c.

struct ast_translator lin16tog722 [static]

Definition at line 171 of file codec_g722.c.

struct ast_translator lintog722 [static]

Definition at line 147 of file codec_g722.c.