mirror of
https://github.com/ZDoom/raze-gles.git
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301 lines
7 KiB
C
301 lines
7 KiB
C
#include "multivoc.h"
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extern char *MV_MixDestination;
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extern unsigned int MV_MixPosition;
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extern char *MV_LeftVolume;
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extern char *MV_RightVolume;
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extern unsigned char *MV_HarshClipTable;
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extern int MV_RightChannelOffset;
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extern int MV_SampleSize;
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void MV_Mix8BitMono(unsigned int position, unsigned int rate,
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const char *start, unsigned int length)
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{
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const unsigned char *src;
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unsigned char *dest;
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unsigned int i;
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src = (const unsigned char *)start;
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dest = (unsigned char *)MV_MixDestination;
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for (i = 0; i < length; i++)
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{
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int s = src[position >> 16];
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int d = *dest;
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s = MV_LeftVolume[s * 2];
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s += d;
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s = MV_HarshClipTable[s + 0x80];
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*dest = (s & 0xff);
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position += rate;
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dest += MV_SampleSize;
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}
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MV_MixPosition = position;
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MV_MixDestination = (char *)dest;
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}
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void MV_Mix8BitStereo(unsigned int position,
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unsigned int rate, const char *start, unsigned int length)
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{
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const unsigned char *src;
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unsigned char *dest;
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unsigned int i;
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src = (const unsigned char *)start;
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dest = (unsigned char *)MV_MixDestination;
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for (i = 0; i < length; i++)
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{
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int s = src[(position >> 16)];
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int dl = dest[0];
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int dr = dest[MV_RightChannelOffset];
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dl += MV_LeftVolume[s * 2];
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dr += MV_RightVolume[s * 2];
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dl = MV_HarshClipTable[dl + 0x80];
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dr = MV_HarshClipTable[dr + 0x80];
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dest[0] = (dl & 0xff);
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dest[MV_RightChannelOffset] = (dr & 0xff);
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position += rate;
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dest += MV_SampleSize;
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}
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MV_MixPosition = position;
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MV_MixDestination = (char *)dest;
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}
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void MV_Mix16BitMono(unsigned int position,
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unsigned int rate, const char *start, unsigned int length)
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{
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const short *MV_LeftVolumeS;
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const unsigned char *src;
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short *dest;
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unsigned int i;
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src = (const unsigned char *)start;
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dest = (short *)MV_MixDestination;
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MV_LeftVolumeS = (const short *)MV_LeftVolume;
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for (i = 0; i < length; i++)
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{
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int s = src[position >> 16];
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int d = dest[0];
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s = MV_LeftVolumeS[s];
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s += d;
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if (s < -32768) s = -32768;
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if (s > 32767) s = 32767;
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*dest = (short) s;
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position += rate;
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dest += MV_SampleSize/2;
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}
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MV_MixPosition = position;
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MV_MixDestination = (char *)dest;
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}
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void MV_Mix16BitStereo(unsigned int position,
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unsigned int rate, const char *start, unsigned int length)
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{
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const short *MV_LeftVolumeS;
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const short *MV_RightVolumeS;
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const unsigned char *src;
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short *dest;
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unsigned int i;
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src = (unsigned char *)start;
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dest = (short *)MV_MixDestination;
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MV_LeftVolumeS = (const short *)MV_LeftVolume;
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MV_RightVolumeS = (const short *)MV_RightVolume;
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for (i = 0; i < length; i++)
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{
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int s = src[position >> 16];
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int dl = dest[0];
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int dr = dest[MV_RightChannelOffset/2];
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dl += MV_LeftVolumeS[s];
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dr += MV_RightVolumeS[s];
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if (dl < -32768) dl = -32768;
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if (dl > 32767) dl = 32767;
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if (dr < -32768) dr = -32768;
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if (dr > 32767) dr = 32767;
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dest[0] = (short) dl;
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dest[MV_RightChannelOffset/2] = (short) dr;
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position += rate;
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dest += MV_SampleSize/2;
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}
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MV_MixPosition = position;
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MV_MixDestination = (char *)dest;
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}
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void MV_Mix8BitMono16(unsigned int position, unsigned int rate,
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const char *start, unsigned int length)
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{
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const char *src;
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unsigned char *dest;
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unsigned int i;
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src = (const char *)start + 1;
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dest = (unsigned char *)MV_MixDestination;
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for (i = 0; i < length; i++)
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{
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int s = (int)src[(position >> 16) * 2] + 0x80;
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int d = *dest;
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s = MV_LeftVolume[s * 2];
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s += d;
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s = MV_HarshClipTable[s + 0x80];
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*dest = (s & 0xff);
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position += rate;
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dest += MV_SampleSize;
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}
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MV_MixPosition = position;
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MV_MixDestination = (char *)dest;
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}
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void MV_Mix8BitStereo16(unsigned int position,
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unsigned int rate, const char *start, unsigned int length)
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{
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const char *src;
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unsigned char *dest;
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unsigned int i;
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src = (const char *)start + 1;
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dest = (unsigned char *)MV_MixDestination;
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for (i = 0; i < length; i++)
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{
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int s = src[(position >> 16) * 2] + 0x80;
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int dl = dest[0];
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int dr = dest[MV_RightChannelOffset];
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dl += MV_LeftVolume[s * 2];
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dr += MV_RightVolume[s * 2];
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dl = MV_HarshClipTable[dl + 0x80];
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dr = MV_HarshClipTable[dr + 0x80];
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dest[0] = (dl & 0xff);
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dest[MV_RightChannelOffset] = (dr & 0xff);
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position += rate;
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dest += MV_SampleSize;
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}
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MV_MixPosition = position;
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MV_MixDestination = (char *)dest;
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}
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void MV_Mix16BitMono16(unsigned int position,
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unsigned int rate, const char *start, unsigned int length)
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{
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const short *MV_LeftVolumeS;
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const unsigned char *src;
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short *dest;
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unsigned int i;
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src = (const unsigned char *)start;
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dest = (short *)MV_MixDestination;
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MV_LeftVolumeS = (const short *)MV_LeftVolume;
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for (i = 0; i < length; i++)
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{
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int sl = src[(position >> 16) * 2 + 0];
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int sh = src[(position >> 16) * 2 + 1] ^ 0x80;
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int d = *dest;
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sl = MV_LeftVolume[sl * 2 + 1];
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sh = MV_LeftVolumeS[sh];
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d = sl + sh + 0x80 + d;
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if (d < -32768) d = -32768;
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if (d > 32767) d = 32767;
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*dest = (short) d;
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position += rate;
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dest += MV_SampleSize/2;
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}
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MV_MixPosition = position;
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MV_MixDestination = (char *)dest;
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}
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void MV_Mix16BitStereo16(unsigned int position,
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unsigned int rate, const char *start, unsigned int length)
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{
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const short *MV_LeftVolumeS;
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const short *MV_RightVolumeS;
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const unsigned char *src;
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short *dest;
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unsigned int i;
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src = (const unsigned char *)start;
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dest = (short *)MV_MixDestination;
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MV_LeftVolumeS = (const short *)MV_LeftVolume;
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MV_RightVolumeS = (const short *)MV_RightVolume;
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for (i = 0; i < length; i++)
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{
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int sl = src[(position >> 16) * 2 + 0];
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int sh = src[(position >> 16) * 2 + 1] ^ 0x80;
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int dl = dest[0];
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int dr = dest[MV_RightChannelOffset/2];
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int sll = MV_LeftVolume[sl * 2 + 1];
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int slh = MV_LeftVolumeS[sh];
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int srl = MV_RightVolume[sl * 2 + 1];
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int srh = MV_RightVolumeS[sh];
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dl = sll + slh + 0x80 + dl;
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dr = srl + srh + 0x80 + dr;
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if (dl < -32768) dl = -32768;
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if (dl > 32767) dl = 32767;
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if (dr < -32768) dr = -32768;
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if (dr > 32767) dr = 32767;
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dest[0] = (short) dl;
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dest[MV_RightChannelOffset/2] = (short) dr;
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position += rate;
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dest += MV_SampleSize/2;
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}
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MV_MixPosition = position;
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MV_MixDestination = (char *)dest;
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}
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