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diff --git a/3.4.0/src/modules/dcc/adpcmcodec.cpp b/3.4.0/src/modules/dcc/adpcmcodec.cpp
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-//
-// File : adpcmcodec.cpp
-// Creation date : Wed Aug 22 19:12:50 2001 GMT by Szymon Stefanek
-//
-// This file is part of the KVirc irc client distribution
-//
-// Code derived from adpcm.c : Intel ADPCM coder/decoder
-// Adapted for the KVirc distribution by Szymon Stefanek (pragma at kvirc dot net)
-// Last revision : 20 Sep 1999
-//
-// Copyright 1992 by Stichting Mathematisch Centrum, Amsterdam, The Netherlands.
-// All Rights Reserved
-//
-// Permission to use, copy, modify, and distribute this software and its
-// documentation for any purpose and without fee is hereby granted,
-// provided that the above copyright notice appear in all copies and that
-// both that copyright notice and this permission notice appear in
-// supporting documentation, and that the names of Stichting Mathematisch
-// Centrum or CWI not be used in advertising or publicity pertaining to
-// distribution of the software without specific, written prior permission.
-//
-// STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
-// THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
-// FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
-// FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
-// OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-//
-//
-// Intel/DVI ADPCM coder/decoder.
-//
-// The algorithm for this coder was taken from the IMA Compatability Project
-// proceedings, Vol 2, Number 2; May 1992.
-//
-// Version 1.2, 18-Dec-92.
-//
-
-#define _ADPCMCODEC_CPP_
-#include "adpcmcodec.h"
-
-#include <stdio.h> /*DBG*/
-
-#ifndef __STDC__
- #define signed
-#endif
-
-
-
-#define ADPCM_PACKED_FRAME_SIZE_IN_BYTES 512
-#define ADPCM_UNPACKED_FRAME_SIZE_IN_BYTES 2048
-#define ADPCM_UNPACKED_FRAME_SIZE_IN_SHORTS 1024
-
-// Intel ADPCM step variation table */
-static int indexTable[16] = {
- -1, -1, -1, -1, 2, 4, 6, 8,
- -1, -1, -1, -1, 2, 4, 6, 8,
-};
-
-static int stepsizeTable[89] = {
- 7, 8, 9, 10, 11, 12, 13, 14, 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, 1707, 1878, 2066,
- 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
- 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
- 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
-};
-
-
-void ADPCM_compress(short indata[],char outdata[],int len,ADPCM_state *state)
-{
- short *lpIn; /* Input buffer pointer */
- signed char *lpOut; /* output buffer pointer */
- int val; /* Current input sample value */
- int sign; /* Current adpcm sign bit */
- int delta; /* Current adpcm output value */
- int diff; /* Difference between val and valprev */
- int step; /* Stepsize */
- int valpred; /* Predicted output value */
- int vpdiff; /* Current change to valpred */
- int index; /* Current step change index */
- int outputbuffer = 0; /* place to keep previous 4-bit value */
- int bufferstep; /* toggle between outputbuffer/output */
-
- lpOut = (signed char *)outdata;
- lpIn = indata;
-
- valpred = state->valprev;
- index = state->index;
- step = stepsizeTable[index];
-
- bufferstep = 1;
-
- for ( ;len > 0;len-- ) {
- val = *lpIn++;
- // Step 1 - compute difference with previous value
- diff = val - valpred;
- sign = (diff < 0) ? 8 : 0;
- if(sign)diff=(-diff);
- // Step 2 - Divide and clamp
- // Note:
- // This code *approximately* computes:
- // delta = diff*4/step;
- // vpdiff = (delta+0.5)*step/4;
- // but in shift step bits are dropped. The net result of this is
- // that even if you have fast mul/div hardware you cannot put it to
- // good use since the fixup would be too expensive.
- //
- delta = 0;
- vpdiff = (step >> 3);
- if (diff >=step){
- delta = 4;
- diff -= step;
- vpdiff += step;
- }
- step >>= 1;
- if (diff >= step) {
- delta |= 2;
- diff -= step;
- vpdiff += step;
- }
- step >>= 1;
- if ( diff >= step ) {
- delta |= 1;
- vpdiff += step;
- }
- // Step 3 - Update previous value
- if(sign)valpred -= vpdiff;
- else valpred += vpdiff;
- // Step 4 - Clamp previous value to 16 bits
- if ( valpred > 32767 )valpred = 32767;
- else if ( valpred < -32768 )valpred = -32768;
- // Step 5 - Assemble value, update index and step values
- delta |= sign;
- index += indexTable[delta];
- if ( index < 0 ) index = 0;
- if ( index > 88 ) index = 88;
- step = stepsizeTable[index];
- // Step 6 - Output value
- if ( bufferstep )outputbuffer = (delta << 4) & 0xf0;
- else *lpOut++ = (delta & 0x0f) | outputbuffer;
- bufferstep = !bufferstep;
- }
- // Output last step, if needed
- if (!bufferstep)*lpOut++ = outputbuffer;
- state->valprev = valpred;
- state->index = index;
-}
-
-void ADPCM_uncompress(char indata[],short outdata[],int len,ADPCM_state *state)
-{
- signed char *inp; /* Input buffer pointer */
- short *outp; /* output buffer pointer */
- int sign; /* Current adpcm sign bit */
- int delta; /* Current adpcm output value */
- int step; /* Stepsize */
- int valpred; /* Predicted value */
- int vpdiff; /* Current change to valpred */
- int index; /* Current step change index */
- int inputbuffer=0; /* place to keep next 4-bit value */
- int bufferstep; /* toggle between inputbuffer/input */
-
- outp = outdata;
- inp = (signed char *)indata;
-
- valpred = state->valprev;
- index = state->index;
- step = stepsizeTable[index];
-
- bufferstep = 0;
-
- for ( ; len > 0 ; len-- ) {
-
- /* Step 1 - get the delta value */
- if ( bufferstep )delta = inputbuffer & 0xf;
- else {
- inputbuffer = *inp++;
- delta = (inputbuffer >> 4) & 0xf;
- }
- bufferstep = !bufferstep;
-
- /* Step 2 - Find new index value (for later) */
- index += indexTable[delta];
- if ( index < 0 ) index = 0;
- if ( index > 88 ) index = 88;
-
- /* Step 3 - Separate sign and magnitude */
- sign = delta & 8;
- delta = delta & 7;
-
- /* Step 4 - Compute difference and new predicted value */
- /*
- ** Computes 'vpdiff = (delta+0.5)*step/4', but see comment
- ** in adpcm_coder.
- */
- vpdiff = step >> 3;
- if( delta & 4 )vpdiff += step;
- if( delta & 2 )vpdiff += step>>1;
- if( delta & 1 )vpdiff += step>>2;
-
- if(sign)valpred -= vpdiff;
- else valpred += vpdiff;
-
- /* Step 5 - clamp output value */
- if(valpred > 32767)valpred = 32767;
- else if(valpred < -32768)valpred = -32768;
-
- /* Step 6 - Update step value */
- step = stepsizeTable[index];
-
- /* Step 7 - Output value */
- *outp++ = valpred;
- }
-
- state->valprev = valpred;
- state->index = index;
-}
-
-
-KviDccVoiceAdpcmCodec::KviDccVoiceAdpcmCodec()
-: KviDccVoiceCodec()
-{
- m_pEncodeState = new ADPCM_state;
- m_pEncodeState->index = 0;
- m_pEncodeState->valprev = 0;
- m_pDecodeState = new ADPCM_state;
- m_pDecodeState->index = 0;
- m_pDecodeState->valprev = 0;
- m_szName = "adpcm (compression 1:4)";
-}
-
-KviDccVoiceAdpcmCodec::~KviDccVoiceAdpcmCodec()
-{
- delete m_pEncodeState;
- delete m_pDecodeState;
-}
-
-void KviDccVoiceAdpcmCodec::encode(KviDataBuffer * signal,KviDataBuffer * stream)
-{
- if(signal->size() < ADPCM_UNPACKED_FRAME_SIZE_IN_BYTES)return; // nothing to encode
-
- char * ptr = (char *)signal->data();
-
- int uFrames = signal->size() / ADPCM_UNPACKED_FRAME_SIZE_IN_BYTES;
- int uTotalDataCompressed = uFrames * ADPCM_UNPACKED_FRAME_SIZE_IN_BYTES;
- int uFrameOffset = stream->size();
- char * endPtr = ptr + uTotalDataCompressed;
-
- stream->addSize(ADPCM_PACKED_FRAME_SIZE_IN_BYTES * uFrames);
-
- while(ptr != endPtr)
- {
- ADPCM_compress((short *)ptr,(char *)(stream->data() + uFrameOffset),ADPCM_UNPACKED_FRAME_SIZE_IN_SHORTS,m_pEncodeState);
- ptr += ADPCM_UNPACKED_FRAME_SIZE_IN_BYTES;
- uFrameOffset += ADPCM_PACKED_FRAME_SIZE_IN_BYTES;
- }
- signal->remove(uTotalDataCompressed);
-}
-
-void KviDccVoiceAdpcmCodec::decode(KviDataBuffer * stream,KviDataBuffer * signal)
-{
- if(stream->size() < ADPCM_PACKED_FRAME_SIZE_IN_BYTES)return; // nothing to decode
-
- char * ptr = (char *)stream->data();
-
- // Adpcm codec
- int uFrames = stream->size() / ADPCM_PACKED_FRAME_SIZE_IN_BYTES;
- int uTotalDataDecompressed = uFrames * ADPCM_PACKED_FRAME_SIZE_IN_BYTES;
- int uSignalOffset = signal->size();
- char * endPtr = ptr + (uTotalDataDecompressed);
-
- signal->addSize(ADPCM_UNPACKED_FRAME_SIZE_IN_BYTES * uFrames);
-
- while(ptr != endPtr)
- {
- ADPCM_uncompress((char *)ptr,(short *)(signal->data() + uSignalOffset),ADPCM_UNPACKED_FRAME_SIZE_IN_SHORTS,m_pDecodeState);
- ptr += ADPCM_PACKED_FRAME_SIZE_IN_BYTES;
- uSignalOffset += ADPCM_UNPACKED_FRAME_SIZE_IN_BYTES;
- }
- stream->remove(uTotalDataDecompressed);
-}
-
-int KviDccVoiceAdpcmCodec::encodedFrameSize()
-{
- return ADPCM_PACKED_FRAME_SIZE_IN_BYTES;
-}
-
-int KviDccVoiceAdpcmCodec::decodedFrameSize()
-{
- return ADPCM_UNPACKED_FRAME_SIZE_IN_BYTES;
-}
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