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Cog/Frameworks/Shorten/Files/shorten/src/fixio.cpp

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/*
* fixio.cpp
* shorten_decoder
*
* Created by Alex Lagutin on Tue Jul 09 2002.
* Copyright (c) 2002 Eckysoft All rights reserved.
*
*/
/******************************************************************************
* *
* Copyright (C) 1992-1995 Tony Robinson *
* *
* See the file doc/LICENSE.shorten for conditions on distribution and usage *
* *
******************************************************************************/
/*
* $Id: fixio.c,v 1.6 2001/12/30 05:12:04 jason Exp $
*/
#include <string.h>
#include "shn_reader.h"
#include "bitshift.h"
#define CAPMAXSCHAR(x) ((x > 127) ? 127 : x)
#define CAPMAXUCHAR(x) ((x > 255) ? 255 : x)
#define CAPMAXSHORT(x) ((x > 32767) ? 32767 : x)
#define CAPMAXUSHORT(x) ((x > 65535) ? 65535 : x)
extern "C"
{
int Sulaw2linear(uchar);
uchar Slinear2ulaw(int);
uchar Slinear2alaw(int);
}
void shn_reader::init_sizeof_sample() {
sizeof_sample[TYPE_AU1] = sizeof(uchar);
sizeof_sample[TYPE_S8] = sizeof(schar);
sizeof_sample[TYPE_U8] = sizeof(uchar);
sizeof_sample[TYPE_S16HL] = sizeof(ushort);
sizeof_sample[TYPE_U16HL] = sizeof(ushort);
sizeof_sample[TYPE_S16LH] = sizeof(ushort);
sizeof_sample[TYPE_U16LH] = sizeof(ushort);
sizeof_sample[TYPE_ULAW] = sizeof(uchar);
sizeof_sample[TYPE_AU2] = sizeof(uchar);
sizeof_sample[TYPE_AU3] = sizeof(uchar);
sizeof_sample[TYPE_ALAW] = sizeof(uchar);
}
/***************/
/* fixed write */
/***************/
void shn_reader::fwrite_type_init()
{
init_sizeof_sample();
mDecodeState.writebuf = (char*) NULL;
mDecodeState.writefub = (char*) NULL;
mDecodeState.nwritebuf = 0;
}
void shn_reader::fwrite_type_quit() {
if(mDecodeState.writebuf != NULL) {
free(mDecodeState.writebuf);
mDecodeState.writebuf = NULL;
}
if(mDecodeState.writefub != NULL) {
free(mDecodeState.writefub);
mDecodeState.writefub = NULL;
}
}
/* convert from signed ints to a given type and write */
void shn_reader::fwrite_type(slong **data,int ftype,int nchan,int nitem)
{
int hiloint = 1, hilo = !(*((char*) &hiloint));
int i, nwrite = 0, datasize = sizeof_sample[ftype], chan;
slong *data0 = data[0];
int bufAvailable = OUT_BUFFER_SIZE - mBytesInBuf;
if(mDecodeState.nwritebuf < nchan * nitem * datasize) {
mDecodeState.nwritebuf = nchan * nitem * datasize;
if(mDecodeState.writebuf != NULL) free(mDecodeState.writebuf);
if(mDecodeState.writefub != NULL) free(mDecodeState.writefub);
mDecodeState.writebuf = (char*) pmalloc((ulong) mDecodeState.nwritebuf);
if (!mDecodeState.writebuf)
return;
mDecodeState.writefub = (char*) pmalloc((ulong) mDecodeState.nwritebuf);
if (!mDecodeState.writefub)
return;
}
switch(ftype) {
case TYPE_AU1: /* leave the conversion to fix_bitshift() */
case TYPE_AU2: {
uchar *writebufp = (uchar*) mDecodeState.writebuf;
if(nchan == 1)
for(i = 0; i < nitem; i++)
*writebufp++ = data0[i];
else
for(i = 0; i < nitem; i++)
for(chan = 0; chan < nchan; chan++)
*writebufp++ = data[chan][i];
break;
}
case TYPE_U8: {
uchar *writebufp = (uchar*) mDecodeState.writebuf;
if(nchan == 1)
for(i = 0; i < nitem; i++)
*writebufp++ = CAPMAXUCHAR(data0[i]);
else
for(i = 0; i < nitem; i++)
for(chan = 0; chan < nchan; chan++)
*writebufp++ = CAPMAXUCHAR(data[chan][i]);
break;
}
case TYPE_S8: {
schar *writebufp = (schar*) mDecodeState.writebuf;
if(nchan == 1)
for(i = 0; i < nitem; i++)
*writebufp++ = CAPMAXSCHAR(data0[i]);
else
for(i = 0; i < nitem; i++)
for(chan = 0; chan < nchan; chan++)
*writebufp++ = CAPMAXSCHAR(data[chan][i]);
break;
}
case TYPE_S16HL:
case TYPE_S16LH: {
short *writebufp = (short*) mDecodeState.writebuf;
if(nchan == 1)
for(i = 0; i < nitem; i++)
*writebufp++ = CAPMAXSHORT(data0[i]);
else
for(i = 0; i < nitem; i++)
for(chan = 0; chan < nchan; chan++)
*writebufp++ = CAPMAXSHORT(data[chan][i]);
break;
}
case TYPE_U16HL:
case TYPE_U16LH: {
ushort *writebufp = (ushort*) mDecodeState.writebuf;
if(nchan == 1)
for(i = 0; i < nitem; i++)
*writebufp++ = CAPMAXUSHORT(data0[i]);
else
for(i = 0; i < nitem; i++)
for(chan = 0; chan < nchan; chan++)
*writebufp++ = CAPMAXUSHORT(data[chan][i]);
break;
}
case TYPE_ULAW: {
uchar *writebufp = (uchar*) mDecodeState.writebuf;
if(nchan == 1)
for(i = 0; i < nitem; i++)
*writebufp++ = Slinear2ulaw(CAPMAXSHORT((data0[i] << 3)));
else
for(i = 0; i < nitem; i++)
for(chan = 0; chan < nchan; chan++)
*writebufp++ = Slinear2ulaw(CAPMAXSHORT((data[chan][i] << 3)));
break;
}
case TYPE_AU3: {
uchar *writebufp = (uchar*) mDecodeState.writebuf;
if(nchan == 1)
for(i = 0; i < nitem; i++)
if(data0[i] < 0)
*writebufp++ = (127 - data0[i]) ^ 0xd5;
else
*writebufp++ = (data0[i] + 128) ^ 0x55;
else
for(i = 0; i < nitem; i++)
for(chan = 0; chan < nchan; chan++)
if(data[chan][i] < 0)
*writebufp++ = (127 - data[chan][i]) ^ 0xd5;
else
*writebufp++ = (data[chan][i] + 128) ^ 0x55;
break;
}
case TYPE_ALAW: {
uchar *writebufp = (uchar*) mDecodeState.writebuf;
if(nchan == 1)
for(i = 0; i < nitem; i++)
*writebufp++ = Slinear2alaw(CAPMAXSHORT((data0[i] << 3)));
else
for(i = 0; i < nitem; i++)
for(chan = 0; chan < nchan; chan++)
*writebufp++ = Slinear2alaw(CAPMAXSHORT((data[chan][i] << 3)));
break;
}
}
switch(ftype) {
case TYPE_AU1:
case TYPE_S8:
case TYPE_U8:
case TYPE_ULAW:
case TYPE_AU2:
case TYPE_AU3:
case TYPE_ALAW:
if (datasize*nchan*nitem <= bufAvailable) {
memcpy((void *)&mBuffer[mBytesInBuf],(const void *)mDecodeState.writebuf,datasize*nchan*nitem);
mBytesInBuf += datasize*nchan*nitem;
nwrite = nitem;
}
else
{
// fprintf(stderr, "Buffer overrun in fwrite_type() [case 1]: %d bytes to read, but only %d bytes are available\n",datasize*nchan*nitem,bufAvailable);
}
break;
case TYPE_S16HL:
case TYPE_U16HL:
if(hilo)
{
if (datasize*nchan*nitem <= bufAvailable) {
memcpy((void *)&mBuffer[mBytesInBuf],(const void *)mDecodeState.writebuf,datasize*nchan*nitem);
mBytesInBuf += datasize*nchan*nitem;
nwrite = nitem;
}
else
{
//fprintf(stderr, "Buffer overrun in fwrite_type() [case 2]: %d bytes to read, but only %d bytes are available\n",datasize*nchan*nitem,bufAvailable);
}
}
else
{
swab(mDecodeState.writebuf, mDecodeState.writefub, datasize * nchan * nitem);
if (datasize*nchan*nitem <= bufAvailable) {
memcpy((void *)&mBuffer[mBytesInBuf],(const void *)mDecodeState.writefub,datasize*nchan*nitem);
mBytesInBuf += datasize*nchan*nitem;
nwrite = nitem;
}
else
{
//fprintf(stderr, "Buffer overrun in fwrite_type() [case 3]: %d bytes to read, but only %d bytes are available\n",datasize*nchan*nitem,bufAvailable);
}
}
break;
case TYPE_S16LH:
case TYPE_U16LH:
if(hilo)
{
swab(mDecodeState.writebuf, mDecodeState.writefub, datasize * nchan * nitem);
if (datasize*nchan*nitem <= bufAvailable) {
memcpy((void *)&mBuffer[mBytesInBuf],(const void *)mDecodeState.writefub,datasize*nchan*nitem);
mBytesInBuf += datasize*nchan*nitem;
nwrite = nitem;
}
else
{
//fprintf(stderr, "Buffer overrun in fwrite_type() [case 4]: %d bytes to read, but only %d bytes are available\n",datasize*nchan*nitem,bufAvailable);
}
}
else
{
if (datasize*nchan*nitem <= bufAvailable) {
memcpy((void *)&mBuffer[mBytesInBuf],(const void *)mDecodeState.writebuf,datasize*nchan*nitem);
mBytesInBuf += datasize*nchan*nitem;
nwrite = nitem;
}
else
{
//fprintf(stderr, "Buffer overrun in fwrite_type() [case 5]: %d bytes to read, but only %d bytes are available\n",datasize*nchan*nitem,bufAvailable);
}
}
break;
}
if(nwrite != nitem)
{
mFatalError = true;
//fprintf(stderr,"Failed to write decompressed stream -\npossible corrupt or truncated file\n");
}
}
/*************/
/* bitshifts */
/*************/
void shn_reader::fix_bitshift(slong *buffer, int nitem, int bitshift, int ftype)
{
int i;
if(ftype == TYPE_AU1)
for(i = 0; i < nitem; i++)
buffer[i] = ulaw_outward[bitshift][buffer[i] + 128];
else if(ftype == TYPE_AU2)
for(i = 0; i < nitem; i++) {
if(buffer[i] >= 0)
buffer[i] = ulaw_outward[bitshift][buffer[i] + 128];
else if(buffer[i] == -1)
buffer[i] = NEGATIVE_ULAW_ZERO;
else
buffer[i] = ulaw_outward[bitshift][buffer[i] + 129];
}
else
if(bitshift != 0)
for(i = 0; i < nitem; i++)
buffer[i] <<= bitshift;
}
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