2005-09-14 20:46:50 +00:00
|
|
|
/*
|
|
|
|
* Asterisk -- An open source telephony toolkit.
|
|
|
|
*
|
|
|
|
* Copyright (C) 1999 - 2005, Digium, Inc.
|
2001-04-07 01:45:34 +00:00
|
|
|
*
|
2005-09-14 20:46:50 +00:00
|
|
|
* Mark Spencer <markster@digium.com>
|
2001-04-07 01:45:34 +00:00
|
|
|
*
|
2005-09-14 20:46:50 +00:00
|
|
|
* See http://www.asterisk.org for more information about
|
|
|
|
* the Asterisk project. Please do not directly contact
|
|
|
|
* any of the maintainers of this project for assistance;
|
|
|
|
* the project provides a web site, mailing lists and IRC
|
|
|
|
* channels for your use.
|
2001-04-07 01:45:34 +00:00
|
|
|
*
|
|
|
|
* This program is free software, distributed under the terms of
|
2005-09-14 20:46:50 +00:00
|
|
|
* the GNU General Public License Version 2. See the LICENSE file
|
|
|
|
* at the top of the source tree.
|
|
|
|
*/
|
|
|
|
|
2005-10-26 13:03:17 +00:00
|
|
|
/*! \file
|
2005-09-14 20:46:50 +00:00
|
|
|
*
|
2005-10-26 13:03:17 +00:00
|
|
|
* \brief codec_ulaw.c - translate between signed linear and ulaw
|
2005-09-14 20:46:50 +00:00
|
|
|
*
|
2005-11-06 15:09:47 +00:00
|
|
|
* \ingroup codecs
|
2001-04-07 01:45:34 +00:00
|
|
|
*/
|
|
|
|
|
2006-06-07 18:54:56 +00:00
|
|
|
#include "asterisk.h"
|
|
|
|
|
|
|
|
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
|
|
|
|
|
2005-04-21 06:02:45 +00:00
|
|
|
#include "asterisk/module.h"
|
|
|
|
#include "asterisk/config.h"
|
|
|
|
#include "asterisk/translate.h"
|
|
|
|
#include "asterisk/ulaw.h"
|
2006-01-21 08:45:39 +00:00
|
|
|
#include "asterisk/utils.h"
|
2001-04-07 01:45:34 +00:00
|
|
|
|
2006-04-08 21:40:57 +00:00
|
|
|
#define BUFFER_SAMPLES 8096 /* size for the translation buffers */
|
2005-03-17 21:30:19 +00:00
|
|
|
|
2001-04-07 01:45:34 +00:00
|
|
|
/* Sample frame data */
|
2008-10-17 21:35:23 +00:00
|
|
|
#include "asterisk/slin.h"
|
|
|
|
#include "ex_ulaw.h"
|
2001-04-07 01:45:34 +00:00
|
|
|
|
2006-04-08 21:40:57 +00:00
|
|
|
/*! \brief convert and store samples in outbuf */
|
|
|
|
static int ulawtolin_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
|
2001-04-07 01:45:34 +00:00
|
|
|
{
|
2006-05-20 13:37:11 +00:00
|
|
|
int i = f->samples;
|
2008-05-22 16:29:54 +00:00
|
|
|
unsigned char *src = f->data.ptr;
|
2008-06-26 17:06:17 +00:00
|
|
|
int16_t *dst = pvt->outbuf.i16 + pvt->samples;
|
2006-05-23 22:57:03 +00:00
|
|
|
|
|
|
|
pvt->samples += i;
|
|
|
|
pvt->datalen += i * 2; /* 2 bytes/sample */
|
2001-04-07 01:45:34 +00:00
|
|
|
|
2006-04-08 21:40:57 +00:00
|
|
|
/* convert and copy in outbuf */
|
2006-05-20 13:37:11 +00:00
|
|
|
while (i--)
|
|
|
|
*dst++ = AST_MULAW(*src++);
|
2005-03-17 21:30:19 +00:00
|
|
|
|
2006-01-20 23:23:00 +00:00
|
|
|
return 0;
|
2001-04-07 01:45:34 +00:00
|
|
|
}
|
|
|
|
|
2006-04-08 21:40:57 +00:00
|
|
|
/*! \brief convert and store samples in outbuf */
|
|
|
|
static int lintoulaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
|
2001-04-07 01:45:34 +00:00
|
|
|
{
|
2006-05-20 13:37:11 +00:00
|
|
|
int i = f->samples;
|
2008-06-26 17:06:17 +00:00
|
|
|
char *dst = pvt->outbuf.c + pvt->samples;
|
2008-05-22 16:29:54 +00:00
|
|
|
int16_t *src = f->data.ptr;
|
2006-05-23 22:57:03 +00:00
|
|
|
|
|
|
|
pvt->samples += i;
|
|
|
|
pvt->datalen += i; /* 1 byte/sample */
|
2006-01-20 23:23:00 +00:00
|
|
|
|
2006-05-20 13:37:11 +00:00
|
|
|
while (i--)
|
|
|
|
*dst++ = AST_LIN2MU(*src++);
|
|
|
|
|
2006-01-20 23:23:00 +00:00
|
|
|
return 0;
|
2001-04-07 01:45:34 +00:00
|
|
|
}
|
|
|
|
|
2006-01-20 23:23:00 +00:00
|
|
|
/*!
|
|
|
|
* \brief The complete translator for ulawToLin.
|
2001-04-07 01:45:34 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
static struct ast_translator ulawtolin = {
|
2006-04-08 21:40:57 +00:00
|
|
|
.name = "ulawtolin",
|
|
|
|
.srcfmt = AST_FORMAT_ULAW,
|
|
|
|
.dstfmt = AST_FORMAT_SLINEAR,
|
|
|
|
.framein = ulawtolin_framein,
|
2008-10-17 21:35:23 +00:00
|
|
|
.sample = ulaw_sample,
|
2006-04-08 21:40:57 +00:00
|
|
|
.buffer_samples = BUFFER_SAMPLES,
|
|
|
|
.buf_size = BUFFER_SAMPLES * 2,
|
2001-04-07 01:45:34 +00:00
|
|
|
};
|
|
|
|
|
2009-11-04 14:05:12 +00:00
|
|
|
static struct ast_translator testlawtolin = {
|
|
|
|
.name = "testlawtolin",
|
|
|
|
.srcfmt = AST_FORMAT_TESTLAW,
|
|
|
|
.dstfmt = AST_FORMAT_SLINEAR,
|
|
|
|
.framein = ulawtolin_framein,
|
|
|
|
.sample = ulaw_sample,
|
|
|
|
.buffer_samples = BUFFER_SAMPLES,
|
|
|
|
.buf_size = BUFFER_SAMPLES * 2,
|
|
|
|
};
|
|
|
|
|
2006-01-20 23:23:00 +00:00
|
|
|
/*!
|
|
|
|
* \brief The complete translator for LinToulaw.
|
2001-04-07 01:45:34 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
static struct ast_translator lintoulaw = {
|
2006-04-08 21:40:57 +00:00
|
|
|
.name = "lintoulaw",
|
|
|
|
.srcfmt = AST_FORMAT_SLINEAR,
|
|
|
|
.dstfmt = AST_FORMAT_ULAW,
|
|
|
|
.framein = lintoulaw_framein,
|
2008-10-17 21:35:23 +00:00
|
|
|
.sample = slin8_sample,
|
2006-04-08 21:40:57 +00:00
|
|
|
.buf_size = BUFFER_SAMPLES,
|
|
|
|
.buffer_samples = BUFFER_SAMPLES,
|
2001-04-07 01:45:34 +00:00
|
|
|
};
|
|
|
|
|
2009-11-04 14:05:12 +00:00
|
|
|
static struct ast_translator lintotestlaw = {
|
|
|
|
.name = "lintotestlaw",
|
|
|
|
.srcfmt = AST_FORMAT_SLINEAR,
|
|
|
|
.dstfmt = AST_FORMAT_TESTLAW,
|
|
|
|
.framein = lintoulaw_framein,
|
|
|
|
.sample = slin8_sample,
|
|
|
|
.buf_size = BUFFER_SAMPLES,
|
|
|
|
.buffer_samples = BUFFER_SAMPLES,
|
|
|
|
};
|
|
|
|
|
2006-08-21 02:11:39 +00:00
|
|
|
static int reload(void)
|
2005-03-17 21:30:19 +00:00
|
|
|
{
|
2007-10-31 19:24:29 +00:00
|
|
|
return AST_MODULE_LOAD_SUCCESS;
|
2005-03-17 21:30:19 +00:00
|
|
|
}
|
|
|
|
|
2006-08-21 02:11:39 +00:00
|
|
|
static int unload_module(void)
|
2001-04-07 01:45:34 +00:00
|
|
|
{
|
2006-01-20 23:23:00 +00:00
|
|
|
int res;
|
2006-08-21 02:11:39 +00:00
|
|
|
|
2006-01-20 23:23:00 +00:00
|
|
|
res = ast_unregister_translator(&lintoulaw);
|
2006-04-14 14:08:19 +00:00
|
|
|
res |= ast_unregister_translator(&ulawtolin);
|
2009-11-04 14:05:12 +00:00
|
|
|
res |= ast_unregister_translator(&testlawtolin);
|
|
|
|
res |= ast_unregister_translator(&lintotestlaw);
|
2006-08-21 02:11:39 +00:00
|
|
|
|
2006-01-20 23:23:00 +00:00
|
|
|
return res;
|
2001-04-07 01:45:34 +00:00
|
|
|
}
|
|
|
|
|
2006-08-21 02:11:39 +00:00
|
|
|
static int load_module(void)
|
2001-04-07 01:45:34 +00:00
|
|
|
{
|
2006-01-20 23:23:00 +00:00
|
|
|
int res;
|
2006-08-21 02:11:39 +00:00
|
|
|
|
|
|
|
res = ast_register_translator(&ulawtolin);
|
2009-11-04 14:05:12 +00:00
|
|
|
if (!res) {
|
2006-08-21 02:11:39 +00:00
|
|
|
res = ast_register_translator(&lintoulaw);
|
2009-11-04 14:05:12 +00:00
|
|
|
res |= ast_register_translator(&lintotestlaw);
|
|
|
|
res |= ast_register_translator(&testlawtolin);
|
|
|
|
} else
|
2006-01-20 23:23:00 +00:00
|
|
|
ast_unregister_translator(&ulawtolin);
|
2007-10-31 19:24:29 +00:00
|
|
|
if (res)
|
|
|
|
return AST_MODULE_LOAD_FAILURE;
|
|
|
|
return AST_MODULE_LOAD_SUCCESS;
|
2001-04-07 01:45:34 +00:00
|
|
|
}
|
2006-04-14 14:08:19 +00:00
|
|
|
|
2006-08-21 02:11:39 +00:00
|
|
|
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "mu-Law Coder/Decoder",
|
|
|
|
.load = load_module,
|
|
|
|
.unload = unload_module,
|
|
|
|
.reload = reload,
|
|
|
|
);
|