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-rw-r--r--1.4.23-rc4/codecs/codec_adpcm.c404
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diff --git a/1.4.23-rc4/codecs/codec_adpcm.c b/1.4.23-rc4/codecs/codec_adpcm.c
deleted file mode 100644
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--- a/1.4.23-rc4/codecs/codec_adpcm.c
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@@ -1,404 +0,0 @@
-/*
- * Asterisk -- An open source telephony toolkit.
- *
- * Based on frompcm.c and topcm.c from the Emiliano MIPL browser/
- * interpreter. See http://www.bsdtelephony.com.mx
- *
- * Copyright (c) 2001 - 2005 Digium, Inc.
- * All rights reserved.
- *
- * Karl Sackett <krs@linux-support.net>, 2001-03-21
- *
- * 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_adpcm.c - translate between signed linear and Dialogic ADPCM
- *
- * \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/linkedlists.h"
-#include "asterisk/module.h"
-#include "asterisk/config.h"
-#include "asterisk/options.h"
-#include "asterisk/translate.h"
-#include "asterisk/channel.h"
-#include "asterisk/utils.h"
-
-/* define NOT_BLI to use a faster but not bit-level identical version */
-/* #define NOT_BLI */
-
-#define BUFFER_SAMPLES 8096 /* size for the translation buffers */
-
-/* Sample frame data */
-
-#include "slin_adpcm_ex.h"
-#include "adpcm_slin_ex.h"
-
-/*
- * Step size index shift table
- */
-
-static int indsft[8] = { -1, -1, -1, -1, 2, 4, 6, 8 };
-
-/*
- * Step size table, where stpsz[i]=floor[16*(11/10)^i]
- */
-
-static int stpsz[49] = {
- 16, 17, 19, 21, 23, 25, 28, 31, 34, 37, 41, 45, 50, 55, 60, 66, 73,
- 80, 88, 97, 107, 118, 130, 143, 157, 173, 190, 209, 230, 253, 279,
- 307, 337, 371, 408, 449, 494, 544, 598, 658, 724, 796, 876, 963,
- 1060, 1166, 1282, 1411, 1552
-};
-
-/*
- * Decoder/Encoder state
- * States for both encoder and decoder are synchronized
- */
-struct adpcm_state {
- int ssindex;
- int signal;
- int zero_count;
- int next_flag;
-};
-
-/*
- * Decode(encoded)
- * Decodes the encoded nibble from the adpcm file.
- *
- * Results:
- * Returns the encoded difference.
- *
- * Side effects:
- * Sets the index to the step size table for the next encode.
- */
-
-static inline short decode(int encoded, struct adpcm_state *state)
-{
- int diff;
- int step;
- int sign;
-
- step = stpsz[state->ssindex];
-
- sign = encoded & 0x08;
- encoded &= 0x07;
-#ifdef NOT_BLI
- diff = (((encoded << 1) + 1) * step) >> 3;
-#else /* BLI code */
- diff = step >> 3;
- if (encoded & 4)
- diff += step;
- if (encoded & 2)
- diff += step >> 1;
- if (encoded & 1)
- diff += step >> 2;
- if ((encoded >> 1) & step & 0x1)
- diff++;
-#endif
- if (sign)
- diff = -diff;
-
- if (state->next_flag & 0x1)
- state->signal -= 8;
- else if (state->next_flag & 0x2)
- state->signal += 8;
-
- state->signal += diff;
-
- if (state->signal > 2047)
- state->signal = 2047;
- else if (state->signal < -2047)
- state->signal = -2047;
-
- state->next_flag = 0;
-
-#ifdef AUTO_RETURN
- if (encoded)
- state->zero_count = 0;
- else if (++(state->zero_count) == 24) {
- state->zero_count = 0;
- if (state->signal > 0)
- state->next_flag = 0x1;
- else if (state->signal < 0)
- state->next_flag = 0x2;
- }
-#endif
-
- state->ssindex += indsft[encoded];
- if (state->ssindex < 0)
- state->ssindex = 0;
- else if (state->ssindex > 48)
- state->ssindex = 48;
-
- return state->signal << 4;
-}
-
-/*
- * Adpcm
- * Takes a signed linear signal and encodes it as ADPCM
- * For more information see http://support.dialogic.com/appnotes/adpcm.pdf
- *
- * Results:
- * Foo.
- *
- * Side effects:
- * signal gets updated with each pass.
- */
-
-static inline int adpcm(short csig, struct adpcm_state *state)
-{
- int diff;
- int step;
- int encoded;
-
- /*
- * Clip csig if too large or too small
- */
- csig >>= 4;
-
- step = stpsz[state->ssindex];
- diff = csig - state->signal;
-
-#ifdef NOT_BLI
- if (diff < 0) {
- encoded = (-diff << 2) / step;
- if (encoded > 7)
- encoded = 7;
- encoded |= 0x08;
- } else {
- encoded = (diff << 2) / step;
- if (encoded > 7)
- encoded = 7;
- }
-#else /* BLI code */
- if (diff < 0) {
- encoded = 8;
- diff = -diff;
- } else
- encoded = 0;
- if (diff >= step) {
- encoded |= 4;
- diff -= step;
- }
- step >>= 1;
- if (diff >= step) {
- encoded |= 2;
- diff -= step;
- }
- step >>= 1;
- if (diff >= step)
- encoded |= 1;
-#endif /* NOT_BLI */
-
- /* feedback to state */
- decode(encoded, state);
-
- return encoded;
-}
-
-/*----------------- Asterisk-codec glue ------------*/
-
-/*! \brief Workspace for translating signed linear signals to ADPCM. */
-struct adpcm_encoder_pvt {
- struct adpcm_state state;
- int16_t inbuf[BUFFER_SAMPLES]; /* Unencoded signed linear values */
-};
-
-/*! \brief Workspace for translating ADPCM signals to signed linear. */
-struct adpcm_decoder_pvt {
- struct adpcm_state state;
-};
-
-/*! \brief decode 4-bit adpcm frame data and store in output buffer */
-static int adpcmtolin_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
-{
- struct adpcm_decoder_pvt *tmp = pvt->pvt;
- int x = f->datalen;
- unsigned char *src = f->data;
- int16_t *dst = (int16_t *)pvt->outbuf + pvt->samples;
-
- while (x--) {
- *dst++ = decode((*src >> 4) & 0xf, &tmp->state);
- *dst++ = decode(*src++ & 0x0f, &tmp->state);
- }
- pvt->samples += f->samples;
- pvt->datalen += 2*f->samples;
- return 0;
-}
-
-/*! \brief fill input buffer with 16-bit signed linear PCM values. */
-static int lintoadpcm_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
-{
- struct adpcm_encoder_pvt *tmp = pvt->pvt;
-
- memcpy(&tmp->inbuf[pvt->samples], f->data, f->datalen);
- pvt->samples += f->samples;
- return 0;
-}
-
-/*! \brief convert inbuf and store into frame */
-static struct ast_frame *lintoadpcm_frameout(struct ast_trans_pvt *pvt)
-{
- struct adpcm_encoder_pvt *tmp = pvt->pvt;
- struct ast_frame *f;
- int i;
- int samples = pvt->samples; /* save original number */
-
- if (samples < 2)
- return NULL;
-
- pvt->samples &= ~1; /* atomic size is 2 samples */
-
- for (i = 0; i < pvt->samples; i += 2) {
- pvt->outbuf[i/2] =
- (adpcm(tmp->inbuf[i ], &tmp->state) << 4) |
- (adpcm(tmp->inbuf[i+1], &tmp->state) );
- };
-
- f = ast_trans_frameout(pvt, pvt->samples/2, 0);
-
- /*
- * If there is a left over sample, move it to the beginning
- * of the input buffer.
- */
-
- if (samples & 1) { /* move the leftover sample at beginning */
- tmp->inbuf[0] = tmp->inbuf[samples - 1];
- pvt->samples = 1;
- }
- return f;
-}
-
-
-/*! \brief AdpcmToLin_Sample */
-static struct ast_frame *adpcmtolin_sample(void)
-{
- static struct ast_frame f;
- f.frametype = AST_FRAME_VOICE;
- f.subclass = AST_FORMAT_ADPCM;
- f.datalen = sizeof(adpcm_slin_ex);
- f.samples = sizeof(adpcm_slin_ex) * 2;
- f.mallocd = 0;
- f.offset = 0;
- f.src = __PRETTY_FUNCTION__;
- f.data = adpcm_slin_ex;
- return &f;
-}
-
-/*! \brief LinToAdpcm_Sample */
-static struct ast_frame *lintoadpcm_sample(void)
-{
- static struct ast_frame f;
- f.frametype = AST_FRAME_VOICE;
- f.subclass = AST_FORMAT_SLINEAR;
- f.datalen = sizeof(slin_adpcm_ex);
- /* Assume 8000 Hz */
- f.samples = sizeof(slin_adpcm_ex) / 2;
- f.mallocd = 0;
- f.offset = 0;
- f.src = __PRETTY_FUNCTION__;
- f.data = slin_adpcm_ex;
- return &f;
-}
-
-static struct ast_translator adpcmtolin = {
- .name = "adpcmtolin",
- .srcfmt = AST_FORMAT_ADPCM,
- .dstfmt = AST_FORMAT_SLINEAR,
- .framein = adpcmtolin_framein,
- .sample = adpcmtolin_sample,
- .desc_size = sizeof(struct adpcm_decoder_pvt),
- .buffer_samples = BUFFER_SAMPLES,
- .buf_size = BUFFER_SAMPLES * 2,
- .plc_samples = 160,
-};
-
-static struct ast_translator lintoadpcm = {
- .name = "lintoadpcm",
- .srcfmt = AST_FORMAT_SLINEAR,
- .dstfmt = AST_FORMAT_ADPCM,
- .framein = lintoadpcm_framein,
- .frameout = lintoadpcm_frameout,
- .sample = lintoadpcm_sample,
- .desc_size = sizeof (struct adpcm_encoder_pvt),
- .buffer_samples = BUFFER_SAMPLES,
- .buf_size = BUFFER_SAMPLES/ 2, /* 2 samples per byte */
-};
-
-static void parse_config(void)
-{
- struct ast_config *cfg = ast_config_load("codecs.conf");
- struct ast_variable *var;
- if (cfg == NULL)
- return;
- for (var = ast_variable_browse(cfg, "plc"); var ; var = var->next) {
- if (!strcasecmp(var->name, "genericplc")) {
- adpcmtolin.useplc = ast_true(var->value) ? 1 : 0;
- if (option_verbose > 2)
- ast_verbose(VERBOSE_PREFIX_3 "codec_adpcm: %susing generic PLC\n", adpcmtolin.useplc ? "" : "not ");
- }
- }
- ast_config_destroy(cfg);
-}
-
-/*! \brief standard module glue */
-static int reload(void)
-{
- parse_config();
- return 0;
-}
-
-static int unload_module(void)
-{
- int res;
-
- res = ast_unregister_translator(&lintoadpcm);
- res |= ast_unregister_translator(&adpcmtolin);
-
- return res;
-}
-
-static int load_module(void)
-{
- int res;
-
- parse_config();
- res = ast_register_translator(&adpcmtolin);
- if (!res)
- res = ast_register_translator(&lintoadpcm);
- else
- ast_unregister_translator(&adpcmtolin);
-
- return res;
-}
-
-AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Adaptive Differential PCM Coder/Decoder",
- .load = load_module,
- .unload = unload_module,
- .reload = reload,
- );
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