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... | |
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 | reload (void) |
standard module glue More... | |
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 = "ac1f6a56484a8820659555499174e588" , .load = load_module, .unload = unload_module, .reload = reload, } |
static struct ast_translator | adpcmtolin |
static 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 48 of file codec_adpcm.c.
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Definition at line 348 of file codec_adpcm.c.
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Definition at line 348 of file codec_adpcm.c.
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inlinestatic |
Definition at line 166 of file codec_adpcm.c.
References decode(), adpcm_state::signal, and adpcm_state::ssindex.
Referenced by lintoadpcm_frameout().
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decode 4-bit adpcm frame data and store in output buffer
Definition at line 231 of file codec_adpcm.c.
References ast_frame::data, ast_trans_pvt::datalen, ast_frame::datalen, decode(), ast_trans_pvt::i16, ast_trans_pvt::outbuf, ast_frame::ptr, ast_trans_pvt::pvt, ast_trans_pvt::samples, ast_frame::samples, and adpcm_decoder_pvt::state.
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inlinestatic |
Definition at line 93 of file codec_adpcm.c.
References adpcm_state::next_flag, adpcm_state::signal, adpcm_state::ssindex, and adpcm_state::zero_count.
Referenced by adpcm(), and adpcmtolin_framein().
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fill input buffer with 16-bit signed linear PCM values.
Definition at line 248 of file codec_adpcm.c.
References ast_frame::data, ast_frame::datalen, adpcm_encoder_pvt::inbuf, ast_frame::ptr, ast_trans_pvt::pvt, ast_trans_pvt::samples, and ast_frame::samples.
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convert inbuf and store into frame
Definition at line 258 of file codec_adpcm.c.
References adpcm(), ast_trans_frameout(), ast_trans_pvt::c, f, adpcm_encoder_pvt::inbuf, ast_trans_pvt::outbuf, ast_trans_pvt::pvt, ast_trans_pvt::samples, ast_frame::samples, and adpcm_encoder_pvt::state.
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Definition at line 330 of file codec_adpcm.c.
References AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, ast_register_translator, and ast_unregister_translator().
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standard module glue
Definition at line 315 of file codec_adpcm.c.
References AST_MODULE_LOAD_SUCCESS.
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Definition at line 320 of file codec_adpcm.c.
References ast_unregister_translator().
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Definition at line 348 of file codec_adpcm.c.
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Definition at line 291 of file codec_adpcm.c.
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Definition at line 348 of file codec_adpcm.c.
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Definition at line 58 of file codec_adpcm.c.
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Definition at line 302 of file codec_adpcm.c.
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Definition at line 64 of file codec_adpcm.c.