747beb1ed1
In all non-pbx modules, AST_MODULE_LOAD_FAILURE has been changed to AST_MODULE_LOAD_DECLINE. This prevents asterisk from exiting if a module can't be loaded. If the user wishes to retain the FAILURE behavior for a specific module, they can use the "require" or "preload-require" keyword in modules.conf. A new API was added to logger: ast_is_logger_initialized(). This allows asterisk.c/check_init() to print to the error log once the logger subsystem is ready instead of just to stdout. If something does fail before the logger is initialized, we now print to stderr instead of stdout. Change-Id: I5f4b50623d9b5a6cb7c5624a8c5c1274c13b2b25
151 lines
3.1 KiB
C
151 lines
3.1 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief codec_a_mu.c - translate between alaw and ulaw directly
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*
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* \ingroup codecs
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#include "asterisk/module.h"
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#include "asterisk/translate.h"
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#include "asterisk/alaw.h"
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#include "asterisk/ulaw.h"
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#include "asterisk/utils.h"
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#define BUFFER_SAMPLES 8000 /* size for the translation buffers */
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static unsigned char mu2a[256];
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static unsigned char a2mu[256];
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/* Sample frame data */
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#include "ex_ulaw.h"
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#include "ex_alaw.h"
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/*! \brief convert frame data and store into the buffer */
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static int alawtoulaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
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{
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int x = f->samples;
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unsigned char *src = f->data.ptr;
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unsigned char *dst = pvt->outbuf.uc + pvt->samples;
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pvt->samples += x;
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pvt->datalen += x;
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while (x--)
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*dst++ = a2mu[*src++];
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return 0;
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}
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/*! \brief convert frame data and store into the buffer */
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static int ulawtoalaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
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{
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int x = f->samples;
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unsigned char *src = f->data.ptr;
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unsigned char *dst = pvt->outbuf.uc + pvt->samples;
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pvt->samples += x;
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pvt->datalen += x;
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while (x--)
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*dst++ = mu2a[*src++];
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return 0;
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}
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static struct ast_translator alawtoulaw = {
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.name = "alawtoulaw",
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.src_codec = {
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.name = "alaw",
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.type = AST_MEDIA_TYPE_AUDIO,
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.sample_rate = 8000,
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},
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.dst_codec = {
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.name = "ulaw",
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.type = AST_MEDIA_TYPE_AUDIO,
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.sample_rate = 8000,
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},
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.format = "ulaw",
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.framein = alawtoulaw_framein,
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.sample = alaw_sample,
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.buffer_samples = BUFFER_SAMPLES,
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.buf_size = BUFFER_SAMPLES,
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};
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static struct ast_translator ulawtoalaw = {
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.name = "ulawtoalaw",
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.src_codec = {
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.name = "ulaw",
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.type = AST_MEDIA_TYPE_AUDIO,
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.sample_rate = 8000,
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},
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.dst_codec = {
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.name = "alaw",
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.type = AST_MEDIA_TYPE_AUDIO,
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.sample_rate = 8000,
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},
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.format = "alaw",
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.framein = ulawtoalaw_framein,
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.sample = ulaw_sample,
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.buffer_samples = BUFFER_SAMPLES,
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.buf_size = BUFFER_SAMPLES,
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};
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/*! \brief standard module glue */
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static int unload_module(void)
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{
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int res;
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res = ast_unregister_translator(&ulawtoalaw);
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res |= ast_unregister_translator(&alawtoulaw);
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return res;
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}
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static int load_module(void)
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{
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int res;
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int x;
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for (x=0;x<256;x++) {
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mu2a[x] = AST_LIN2A(AST_MULAW(x));
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a2mu[x] = AST_LIN2MU(AST_ALAW(x));
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}
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res = ast_register_translator(&alawtoulaw);
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res |= ast_register_translator(&ulawtoalaw);
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if (res) {
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unload_module();
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return AST_MODULE_LOAD_DECLINE;
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}
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return AST_MODULE_LOAD_SUCCESS;
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "A-law and Mulaw direct Coder/Decoder");
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