diff options
Diffstat (limited to '1.2-netsec/codecs/codec_alaw.c')
-rw-r--r-- | 1.2-netsec/codecs/codec_alaw.c | 428 |
1 files changed, 0 insertions, 428 deletions
diff --git a/1.2-netsec/codecs/codec_alaw.c b/1.2-netsec/codecs/codec_alaw.c deleted file mode 100644 index 86e3a6592..000000000 --- a/1.2-netsec/codecs/codec_alaw.c +++ /dev/null @@ -1,428 +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_alaw.c - translate between signed linear and alaw - * - * \ingroup codecs - */ - -#include <fcntl.h> -#include <netinet/in.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include "asterisk.h" - -ASTERISK_FILE_VERSION(__FILE__, "$Revision$") - -#include "asterisk/lock.h" -#include "asterisk/logger.h" -#include "asterisk/module.h" -#include "asterisk/config.h" -#include "asterisk/options.h" -#include "asterisk/translate.h" -#include "asterisk/channel.h" -#include "asterisk/alaw.h" - -#define BUFFER_SIZE 8096 /* size for the translation buffers */ - -AST_MUTEX_DEFINE_STATIC(localuser_lock); -static int localusecnt = 0; - -static char *tdesc = "A-law Coder/Decoder"; - -static int useplc = 0; - -/* Sample frame data (Mu data is okay) */ - -#include "slin_ulaw_ex.h" -#include "ulaw_slin_ex.h" - -/*! - * \brief Private workspace for translating signed linear signals to alaw. - */ -struct alaw_encoder_pvt -{ - struct ast_frame f; - char offset[AST_FRIENDLY_OFFSET]; /*!< Space to build offset */ - unsigned char outbuf[BUFFER_SIZE]; /*!< Encoded alaw, two nibbles to a word */ - int tail; -}; - -/*! - * \brief Private workspace for translating alaw signals to signed linear. - */ -struct alaw_decoder_pvt -{ - struct ast_frame f; - char offset[AST_FRIENDLY_OFFSET]; /* Space to build offset */ - short outbuf[BUFFER_SIZE]; /* Decoded signed linear values */ - int tail; - plc_state_t plc; -}; - -/*! - * \brief alawToLin_New - * Create a new instance of alaw_decoder_pvt. - * - * Results: - * Returns a pointer to the new instance. - * - * Side effects: - * None. - */ - -static struct ast_translator_pvt * alawtolin_new (void) -{ - struct alaw_decoder_pvt *tmp; - tmp = malloc (sizeof (struct alaw_decoder_pvt)); - if (tmp) - { - memset(tmp, 0, sizeof(*tmp)); - tmp->tail = 0; - plc_init(&tmp->plc); - localusecnt++; - ast_update_use_count (); - } - return (struct ast_translator_pvt *) tmp; -} - -/*! - * \brief LinToalaw_New - * Create a new instance of alaw_encoder_pvt. - * - * Results: - * Returns a pointer to the new instance. - * - * Side effects: - * None. - */ - -static struct ast_translator_pvt * lintoalaw_new (void) -{ - struct alaw_encoder_pvt *tmp; - tmp = malloc (sizeof (struct alaw_encoder_pvt)); - if (tmp) - { - memset(tmp, 0, sizeof(*tmp)); - localusecnt++; - ast_update_use_count (); - tmp->tail = 0; - } - return (struct ast_translator_pvt *) tmp; -} - -/*! - * \brief alawToLin_FrameIn - * Fill an input buffer with packed 4-bit alaw values if there is room - * left. - * - * Results: - * Foo - * - * Side effects: - * tmp->tail is the number of packed values in the buffer. - */ - -static int -alawtolin_framein (struct ast_translator_pvt *pvt, struct ast_frame *f) -{ - struct alaw_decoder_pvt *tmp = (struct alaw_decoder_pvt *) pvt; - int x; - unsigned char *b; - - if(f->datalen == 0) { /* perform PLC with nominal framesize of 20ms/160 samples */ - if((tmp->tail + 160) * 2 > sizeof(tmp->outbuf)) { - ast_log(LOG_WARNING, "Out of buffer space\n"); - return -1; - } - if(useplc) { - plc_fillin(&tmp->plc, tmp->outbuf+tmp->tail, 160); - tmp->tail += 160; - } - return 0; - } - - if ((tmp->tail + f->datalen) * 2 > sizeof(tmp->outbuf)) { - ast_log(LOG_WARNING, "Out of buffer space\n"); - return -1; - } - - /* Reset ssindex and signal to frame's specified values */ - b = f->data; - for (x=0;x<f->datalen;x++) - tmp->outbuf[tmp->tail + x] = AST_ALAW(b[x]); - - if(useplc) plc_rx(&tmp->plc, tmp->outbuf+tmp->tail, f->datalen); - - tmp->tail += f->datalen; - return 0; -} - -/*! - * \brief alawToLin_FrameOut - * Convert 4-bit alaw encoded signals to 16-bit signed linear. - * - * Results: - * Converted signals are placed in tmp->f.data, tmp->f.datalen - * and tmp->f.samples are calculated. - * - * Side effects: - * None. - */ - -static struct ast_frame * alawtolin_frameout (struct ast_translator_pvt *pvt) -{ - struct alaw_decoder_pvt *tmp = (struct alaw_decoder_pvt *) pvt; - - if (!tmp->tail) - return NULL; - - tmp->f.frametype = AST_FRAME_VOICE; - tmp->f.subclass = AST_FORMAT_SLINEAR; - tmp->f.datalen = tmp->tail *2; - tmp->f.samples = tmp->tail; - tmp->f.mallocd = 0; - tmp->f.offset = AST_FRIENDLY_OFFSET; - tmp->f.src = __PRETTY_FUNCTION__; - tmp->f.data = tmp->outbuf; - tmp->tail = 0; - return &tmp->f; -} - -/*! - * \brief LinToalaw_FrameIn - * Fill an input buffer with 16-bit signed linear PCM values. - * - * Results: - * None. - * - * Side effects: - * tmp->tail is number of signal values in the input buffer. - */ - -static int lintoalaw_framein (struct ast_translator_pvt *pvt, struct ast_frame *f) -{ - struct alaw_encoder_pvt *tmp = (struct alaw_encoder_pvt *) pvt; - int x; - short *s; - if (tmp->tail + f->datalen/2 >= sizeof(tmp->outbuf)) - { - ast_log (LOG_WARNING, "Out of buffer space\n"); - return -1; - } - s = f->data; - for (x=0;x<f->datalen/2;x++) - tmp->outbuf[x+tmp->tail] = AST_LIN2A(s[x]); - tmp->tail += f->datalen/2; - return 0; -} - -/*! - * \brief LinToalaw_FrameOut - * Convert a buffer of raw 16-bit signed linear PCM to a buffer - * of 4-bit alaw packed two to a byte (Big Endian). - * - * Results: - * Foo - * - * Side effects: - * Leftover inbuf data gets packed, tail gets updated. - */ - -static struct ast_frame * lintoalaw_frameout (struct ast_translator_pvt *pvt) -{ - struct alaw_encoder_pvt *tmp = (struct alaw_encoder_pvt *) pvt; - - if (tmp->tail) { - tmp->f.frametype = AST_FRAME_VOICE; - tmp->f.subclass = AST_FORMAT_ALAW; - tmp->f.samples = tmp->tail; - tmp->f.mallocd = 0; - tmp->f.offset = AST_FRIENDLY_OFFSET; - tmp->f.src = __PRETTY_FUNCTION__; - tmp->f.data = tmp->outbuf; - tmp->f.datalen = tmp->tail; - tmp->tail = 0; - return &tmp->f; - } else return NULL; -} - - -/*! - * \brief alawToLin_Sample - */ - -static struct ast_frame * alawtolin_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; - return &f; -} - -/*! - * \brief LinToalaw_Sample - */ - -static struct ast_frame * lintoalaw_sample (void) -{ - static struct ast_frame f; - f.frametype = AST_FRAME_VOICE; - f.subclass = AST_FORMAT_SLINEAR; - f.datalen = sizeof (slin_ulaw_ex); - /* Assume 8000 Hz */ - f.samples = sizeof (slin_ulaw_ex) / 2; - f.mallocd = 0; - f.offset = 0; - f.src = __PRETTY_FUNCTION__; - f.data = slin_ulaw_ex; - return &f; -} - -/*! - * \brief alaw_Destroy - * Destroys a private workspace. - * - * Results: - * It's gone! - * - * Side effects: - * None. - */ - -static void alaw_destroy (struct ast_translator_pvt *pvt) -{ - free (pvt); - localusecnt--; - ast_update_use_count (); -} - -/*! - * \brief The complete translator for alawToLin. - */ - -static struct ast_translator alawtolin = { - "alawtolin", - AST_FORMAT_ALAW, - AST_FORMAT_SLINEAR, - alawtolin_new, - alawtolin_framein, - alawtolin_frameout, - alaw_destroy, - /* NULL */ - alawtolin_sample -}; - -/*! - * \brief The complete translator for LinToalaw. - */ - -static struct ast_translator lintoalaw = { - "lintoalaw", - AST_FORMAT_SLINEAR, - AST_FORMAT_ALAW, - lintoalaw_new, - lintoalaw_framein, - lintoalaw_frameout, - alaw_destroy, - /* NULL */ - lintoalaw_sample -}; - -static void parse_config(void) -{ - struct ast_config *cfg; - struct ast_variable *var; - - if ((cfg = ast_config_load("codecs.conf"))) { - if ((var = ast_variable_browse(cfg, "plc"))) { - while (var) { - if (!strcasecmp(var->name, "genericplc")) { - useplc = ast_true(var->value) ? 1 : 0; - if (option_verbose > 2) - ast_verbose(VERBOSE_PREFIX_3 "codec_alaw: %susing generic PLC\n", useplc ? "" : "not "); - } - var = var->next; - } - } - ast_config_destroy(cfg); - } -} - -int reload(void) -{ - parse_config(); - return 0; -} - -int unload_module (void) -{ - int res; - ast_mutex_lock (&localuser_lock); - res = ast_unregister_translator (&lintoalaw); - if (!res) - res = ast_unregister_translator (&alawtolin); - if (localusecnt) - res = -1; - ast_mutex_unlock (&localuser_lock); - return res; -} - -int load_module (void) -{ - int res; - parse_config(); - res = ast_register_translator (&alawtolin); - if (!res) - res = ast_register_translator (&lintoalaw); - else - ast_unregister_translator (&alawtolin); - return res; -} - -/* - * Return a description of this module. - */ - -char * description (void) -{ - return tdesc; -} - -int usecount (void) -{ - int res; - STANDARD_USECOUNT (res); - return res; -} - -char * key () -{ - return ASTERISK_GPL_KEY; -} |