Asterisk - The Open Source Telephony Project
21.4.1
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codec_adpcm.c - translate between signed linear and Dialogic ADPCM More...
#include "asterisk.h"
#include "asterisk/lock.h"
#include "asterisk/linkedlists.h"
#include "asterisk/module.h"
#include "asterisk/config.h"
#include "asterisk/translate.h"
#include "asterisk/utils.h"
#include "asterisk/slin.h"
#include "ex_adpcm.h"
Go to the source code of this file.
Data Structures | |
struct | adpcm_decoder_pvt |
Workspace for translating ADPCM signals to signed linear. More... | |
struct | adpcm_encoder_pvt |
Workspace for translating signed linear signals to ADPCM. More... | |
struct | adpcm_state |
Macros | |
#define | BUFFER_SAMPLES 8096 /* size for the translation buffers */ |
Functions | |
static void | __reg_module (void) |
static void | __unreg_module (void) |
static int | adpcm (short csig, struct adpcm_state *state) |
static int | adpcmtolin_framein (struct ast_trans_pvt *pvt, struct ast_frame *f) |
decode 4-bit adpcm frame data and store in output buffer | |
struct ast_module * | AST_MODULE_SELF_SYM (void) |
static short | decode (int encoded, struct adpcm_state *state) |
static int | lintoadpcm_framein (struct ast_trans_pvt *pvt, struct ast_frame *f) |
fill input buffer with 16-bit signed linear PCM values. | |
static struct ast_frame * | lintoadpcm_frameout (struct ast_trans_pvt *pvt) |
convert inbuf and store into 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_DEFAULT , .description = "Adaptive Differential PCM 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" , .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, } |
static struct ast_translator | adpcmtolin |
static const struct ast_module_info * | ast_module_info = &__mod_info |
static int | indsft [8] = { -1, -1, -1, -1, 2, 4, 6, 8 } |
static struct ast_translator | lintoadpcm |
static int | stpsz [49] |
codec_adpcm.c - translate between signed linear and Dialogic ADPCM
Definition in file codec_adpcm.c.