Asterisk - The Open Source Telephony Project GIT-master-3dae2cf
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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 More... | |
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. More... | |
static struct ast_frame * | lintoadpcm_frameout (struct ast_trans_pvt *pvt) |
convert inbuf and store into frame 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 = "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 = AST_BUILDOPT_SUM, .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.
#define BUFFER_SAMPLES 8096 /* size for the translation buffers */ |
Definition at line 46 of file codec_adpcm.c.
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Definition at line 359 of file codec_adpcm.c.
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Definition at line 359 of file codec_adpcm.c.
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inlinestatic |
Definition at line 164 of file codec_adpcm.c.
References decode(), and stpsz.
Referenced by lintoadpcm_frameout().
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decode 4-bit adpcm frame data and store in output buffer
Definition at line 229 of file codec_adpcm.c.
References ast_frame::data, ast_frame::datalen, ast_trans_pvt::datalen, 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().
struct ast_module * AST_MODULE_SELF_SYM | ( | void | ) |
Definition at line 359 of file codec_adpcm.c.
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inlinestatic |
Definition at line 91 of file codec_adpcm.c.
Referenced by adpcm(), and adpcmtolin_framein().
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fill input buffer with 16-bit signed linear PCM values.
Definition at line 246 of file codec_adpcm.c.
References ast_frame::data, ast_frame::datalen, ast_frame::ptr, ast_trans_pvt::pvt, ast_frame::samples, ast_trans_pvt::samples, and tmp().
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convert inbuf and store into frame
Definition at line 256 of file codec_adpcm.c.
References adpcm(), ast_trans_frameout(), ast_trans_pvt::c, NULL, ast_trans_pvt::outbuf, ast_trans_pvt::pvt, ast_frame::samples, ast_trans_pvt::samples, and tmp().
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Definition at line 340 of file codec_adpcm.c.
References adpcmtolin, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_register_translator, lintoadpcm, and unload_module().
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Definition at line 330 of file codec_adpcm.c.
References adpcmtolin, ast_unregister_translator(), and lintoadpcm.
Referenced by load_module().
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Definition at line 359 of file codec_adpcm.c.
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Definition at line 289 of file codec_adpcm.c.
Referenced by load_module(), and unload_module().
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Definition at line 359 of file codec_adpcm.c.
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Definition at line 56 of file codec_adpcm.c.
Referenced by decode().
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Definition at line 309 of file codec_adpcm.c.
Referenced by load_module(), and unload_module().
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Definition at line 62 of file codec_adpcm.c.