diff options
Diffstat (limited to 'codecs/codec_a_mu.c')
| -rw-r--r-- | codecs/codec_a_mu.c | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/codecs/codec_a_mu.c b/codecs/codec_a_mu.c deleted file mode 100644 index b9c1c4938..000000000 --- a/codecs/codec_a_mu.c +++ /dev/null @@ -1,168 +0,0 @@ -/* - * Asterisk -- An open source telephony toolkit. - * - * Copyright (C) 1999 - 2005, Digium, Inc. - * - * Mark Spencer <markster@digium.com> - * - * 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. - * - * This program is free software, distributed under the terms of - * the GNU General Public License Version 2. See the LICENSE file - * at the top of the source tree. - */ - -/*! \file - * - * \brief codec_a_mu.c - translate between alaw and ulaw directly - * - * \ingroup codecs - */ - -#include "asterisk.h" - -ASTERISK_FILE_VERSION(__FILE__, "$Revision$") - -#include <fcntl.h> -#include <netinet/in.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include "asterisk/lock.h" -#include "asterisk/logger.h" -#include "asterisk/module.h" -#include "asterisk/translate.h" -#include "asterisk/channel.h" -#include "asterisk/alaw.h" -#include "asterisk/ulaw.h" -#include "asterisk/utils.h" - -#define BUFFER_SAMPLES 8000 /* size for the translation buffers */ - -static unsigned char mu2a[256]; -static unsigned char a2mu[256]; - -/* Sample frame data (Mu data is okay) */ - -#include "ulaw_slin_ex.h" - -/*! \brief convert frame data and store into the buffer */ -static int alawtoulaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f) -{ - int x = f->samples; - unsigned char *src = f->data; - unsigned char *dst = (unsigned char *)pvt->outbuf + pvt->samples; - - pvt->samples += x; - pvt->datalen += x; - - while (x--) - *dst++ = a2mu[*src++]; - - return 0; -} - -/*! \brief convert frame data and store into the buffer */ -static int ulawtoalaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f) -{ - int x = f->samples; - unsigned char *src = f->data; - unsigned char *dst = (unsigned char *)pvt->outbuf + pvt->samples; - - pvt->samples += x; - pvt->datalen += x; - - while (x--) - *dst++ = mu2a[*src++]; - - return 0; -} - -/* - * alawToLin_Sample. Just random data, somehow... - */ -static struct ast_frame *alawtoulaw_sample(void) -{ - static struct ast_frame f; - f.frametype = AST_FRAME_VOICE; - f.subclass = AST_FORMAT_ALAW; - f.datalen = sizeof(ulaw_slin_ex); - f.samples = sizeof(ulaw_slin_ex); - f.mallocd = 0; - f.offset = 0; - f.src = __PRETTY_FUNCTION__; - f.data = ulaw_slin_ex; /* XXX what ? */ - return &f; -} - -static struct ast_frame *ulawtoalaw_sample(void) -{ - static struct ast_frame f; - f.frametype = AST_FRAME_VOICE; - f.subclass = AST_FORMAT_ULAW; - f.datalen = sizeof(ulaw_slin_ex); - f.samples = sizeof(ulaw_slin_ex); - f.mallocd = 0; - f.offset = 0; - f.src = __PRETTY_FUNCTION__; - f.data = ulaw_slin_ex; - return &f; -} - -static struct ast_translator alawtoulaw = { - .name = "alawtoulaw", - .srcfmt = AST_FORMAT_ALAW, - .dstfmt = AST_FORMAT_ULAW, - .framein = alawtoulaw_framein, - .sample = alawtoulaw_sample, - .buffer_samples = BUFFER_SAMPLES, - .buf_size = BUFFER_SAMPLES, -}; - -static struct ast_translator ulawtoalaw = { - .name = "ulawtoalaw", - .srcfmt = AST_FORMAT_ULAW, - .dstfmt = AST_FORMAT_ALAW, - .framein = ulawtoalaw_framein, - .sample = ulawtoalaw_sample, - .buffer_samples = BUFFER_SAMPLES, - .buf_size = BUFFER_SAMPLES, -}; - -/*! \brief standard module glue */ - -static int unload_module(void) -{ - int res; - - res = ast_unregister_translator(&ulawtoalaw); - res |= ast_unregister_translator(&alawtoulaw); - - return res; -} - -static int load_module(void) -{ - int res; - int x; - - for (x=0;x<256;x++) { - mu2a[x] = AST_LIN2A(AST_MULAW(x)); - a2mu[x] = AST_LIN2MU(AST_ALAW(x)); - } - res = ast_register_translator(&alawtoulaw); - if (!res) - res = ast_register_translator(&ulawtoalaw); - else - ast_unregister_translator(&alawtoulaw); - - return res; -} - -AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "A-law and Mulaw direct Coder/Decoder"); |