raze-gles/polymer/eduke32/source/jaudiolib/mvreverb-c.c

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#include "multivoc.h"
#include "_multivc.h"
void MV_16BitReverb(char *src, char *dest, VOLUME16 *volume, int count)
{
int i;
short *pdest = (short *)dest;
for (i = 0; i < count; i++)
{
#if PLATFORM_BIGENDIAN
int sl = src[i*2+1];
int sh = src[i*2+0] ^ 0x80;
#else
int sl = src[i*2+0];
int sh = src[i*2+1] ^ 0x80;
#endif
sl = (*volume)[sl] >> 8;
sh = (*volume)[sh];
pdest[i] = (short)(sl + sh + 0x80);
}
}
void MV_8BitReverb(signed char *src, signed char *dest, VOLUME16 *volume, int count)
{
int i;
for (i = 0; i < count; i++)
{
unsigned char s = (unsigned char) src[i];
s = (*volume)[s] & 0xff;
dest[i] = (char)(s + 0x80);
}
}
void MV_16BitReverbFast(char *src, char *dest, int count, int shift)
{
int i;
short *pdest = (short *)dest;
const short *psrc = (const short *)src;
for (i = 0; i < count; i++)
{
pdest[i] = psrc[i] >> shift;
}
}
void MV_8BitReverbFast(signed char *src, signed char *dest, int count, int shift)
{
int i;
unsigned char sh = 0x80 - (0x80 >> shift);
for (i = 0; i < count; i++)
{
unsigned char a = ((unsigned char) src[i]) >> shift;
unsigned char c = (((unsigned char) src[i]) ^ 0x80) >> 7;
dest[i] = (signed char)(a + sh + c);
}
}