mirror of
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fdd84d1870
and some VoiceNode struct members with a const, commit forgotten vorbis.c changes. git-svn-id: https://svn.eduke32.com/eduke32@2100 1a8010ca-5511-0410-912e-c29ae57300e0
286 lines
9 KiB
C
286 lines
9 KiB
C
/*
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Copyright (C) 2009 Jonathon Fowler <jf@jonof.id.au>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "_multivc.h"
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/*
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JBF:
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position = offset of starting sample in start
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rate = resampling increment
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start = sound data
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length = count of samples to mix
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*/
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// 8-bit stereo source, 8-bit mono output
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void MV_Mix8BitMono8Stereo( uint32_t position, uint32_t rate,
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const char *start, uint32_t length )
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{
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uint8_t *source = (uint8_t *) start;
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uint8_t *dest = (uint8_t *) MV_MixDestination;
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int32_t sample0, sample1;
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while (length--) {
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sample0 = source[(position >> 16) << 1];
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sample1 = source[((position >> 16) << 1) + 1];
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position += rate;
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sample0 = (MV_LeftVolume[sample0] + MV_LeftVolume[sample1]) / 2 + *dest;
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sample0 = MV_HarshClipTable[sample0 + 128];
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*dest = sample0 & 255;
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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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// 8-bit stereo source, 8-bit stereo output
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void MV_Mix8BitStereo8Stereo( uint32_t position, uint32_t rate,
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const char *start, uint32_t length )
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{
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uint8_t *source = (uint8_t *) start;
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uint8_t *dest = (uint8_t *) MV_MixDestination;
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int32_t sample0, sample1;
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while (length--) {
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sample0 = source[(position >> 16) << 1];
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sample1 = source[((position >> 16) << 1) + 1];
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position += rate;
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sample0 = MV_LeftVolume[sample0] + *dest;
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sample1 = MV_RightVolume[sample1] + *(dest + MV_RightChannelOffset);
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sample0 = MV_HarshClipTable[sample0 + 128];
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sample1 = MV_HarshClipTable[sample1 + 128];
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*dest = sample0 & 255;
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*(dest + MV_RightChannelOffset) = sample1 & 255;
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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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// 8-bit stereo source, 16-bit mono output
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void MV_Mix16BitMono8Stereo( uint32_t position, uint32_t rate,
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const char *start, uint32_t length )
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{
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uint8_t *source = (uint8_t *) start;
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int16_t *dest = (int16_t *) MV_MixDestination;
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int32_t sample0, sample1;
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while (length--) {
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sample0 = source[(position >> 16) << 1];
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sample1 = source[((position >> 16) << 1) + 1];
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position += rate;
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sample0 = (MV_LeftVolume[sample0] + MV_LeftVolume[sample1]) / 2 + *dest;
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if (sample0 < -32768) sample0 = -32768;
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else if (sample0 > 32767) sample0 = 32767;
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*dest = (int16_t) sample0;
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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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// 8-bit stereo source, 16-bit stereo output
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void MV_Mix16BitStereo8Stereo( uint32_t position, uint32_t rate,
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const char *start, uint32_t length )
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{
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uint8_t *source = (uint8_t *) start;
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int16_t *dest = (int16_t *) MV_MixDestination;
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int32_t sample0, sample1;
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while (length--) {
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sample0 = source[(position >> 16) << 1];
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sample1 = source[((position >> 16) << 1) + 1];
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position += rate;
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sample0 = MV_LeftVolume[sample0] + *dest;
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sample1 = MV_RightVolume[sample1] + *(dest + MV_RightChannelOffset / 2);
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if (sample0 < -32768) sample0 = -32768;
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else if (sample0 > 32767) sample0 = 32767;
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if (sample1 < -32768) sample1 = -32768;
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else if (sample1 > 32767) sample1 = 32767;
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*dest = (int16_t) sample0;
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*(dest + MV_RightChannelOffset/2) = (int16_t) sample1;
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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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// 16-bit stereo source, 16-bit mono output
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void MV_Mix16BitMono16Stereo( uint32_t position, uint32_t rate,
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const char *start, uint32_t length )
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{
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uint16_t *source = (uint16_t *) start;
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int16_t *dest = (int16_t *) MV_MixDestination;
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int32_t sample0l, sample0h, sample0;
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int32_t sample1l, sample1h, sample1;
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while (length--) {
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sample0 = source[(position >> 16) << 1];
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sample1 = source[((position >> 16) << 1) + 1];
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#ifdef BIGENDIAN
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sample0l = sample0 >> 8;
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sample0h = (sample0 & 255) ^ 128;
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sample1l = sample1 >> 8;
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sample1h = (sample1 & 255) ^ 128;
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#else
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sample0l = sample0 & 255;
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sample0h = (sample0 >> 8) ^ 128;
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sample1l = sample1 & 255;
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sample1h = (sample1 >> 8) ^ 128;
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#endif
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position += rate;
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sample0l = MV_LeftVolume[sample0l] >> 8;
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sample0h = MV_LeftVolume[sample0h];
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sample0 = sample0l + sample0h + 128;
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sample1l = MV_LeftVolume[sample1l] >> 8;
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sample1h = MV_LeftVolume[sample1h];
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sample1 = sample1l + sample1h + 128;
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sample0 = (sample0 + sample1) / 2 + *dest;
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if (sample0 < -32768) sample0 = -32768;
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else if (sample0 > 32767) sample0 = 32767;
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*dest = (int16_t) sample0;
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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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// 16-bit stereo source, 8-bit mono output
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void MV_Mix8BitMono16Stereo( uint32_t position, uint32_t rate,
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const char *start, uint32_t length )
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{
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int8_t *source = (int8_t *) start + 1;
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uint8_t *dest = (uint8_t *) MV_MixDestination;
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int32_t sample0, sample1;
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while (length--) {
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sample0 = source[(position >> 16) << 2];
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sample1 = source[((position >> 16) << 2) + 2];
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position += rate;
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sample0 = MV_LeftVolume[sample0 + 128];
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sample1 = MV_LeftVolume[sample1 + 128];
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sample0 = (sample0 + sample1) / 2 + *dest;
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sample0 = MV_HarshClipTable[sample0 + 128];
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*dest = sample0 & 255;
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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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// 16-bit stereo source, 8-bit stereo output
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void MV_Mix8BitStereo16Stereo( uint32_t position, uint32_t rate,
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const char *start, uint32_t length )
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{
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int8_t *source = (int8_t *) start + 1;
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uint8_t *dest = (uint8_t *) MV_MixDestination;
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int32_t sample0, sample1;
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while (length--) {
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sample0 = source[(position >> 16) << 2];
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sample1 = source[((position >> 16) << 2) + 2];
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position += rate;
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sample0 = MV_LeftVolume[sample0 + 128] + *dest;
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sample1 = MV_RightVolume[sample1 + 128] + *(dest + MV_RightChannelOffset);
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sample0 = MV_HarshClipTable[sample0 + 128];
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sample1 = MV_HarshClipTable[sample1 + 128];
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*dest = sample0 & 255;
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*(dest + MV_RightChannelOffset) = sample1 & 255;
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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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// 16-bit stereo source, 16-bit stereo output
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void MV_Mix16BitStereo16Stereo( uint32_t position, uint32_t rate,
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const char *start, uint32_t length )
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{
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uint16_t *source = (uint16_t *) start;
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int16_t *dest = (int16_t *) MV_MixDestination;
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int32_t sample0l, sample0h, sample0;
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int32_t sample1l, sample1h, sample1;
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while (length--) {
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sample0 = source[(position >> 16) << 1];
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sample1 = source[((position >> 16) << 1) + 1];
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#ifdef BIGENDIAN
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sample0l = sample0 >> 8;
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sample0h = (sample0 & 255) ^ 128;
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sample1l = sample1 >> 8;
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sample1h = (sample1 & 255) ^ 128;
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#else
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sample0l = sample0 & 255;
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sample0h = (sample0 >> 8) ^ 128;
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sample1l = sample1 & 255;
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sample1h = (sample1 >> 8) ^ 128;
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#endif
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position += rate;
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sample0l = MV_LeftVolume[sample0l] >> 8;
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sample0h = MV_LeftVolume[sample0h];
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sample1l = MV_RightVolume[sample1l] >> 8;
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sample1h = MV_RightVolume[sample1h];
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sample0 = sample0l + sample0h + 128 + *dest;
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sample1 = sample1l + sample1h + 128 + *(dest + MV_RightChannelOffset/2);
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if (sample0 < -32768) sample0 = -32768;
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else if (sample0 > 32767) sample0 = 32767;
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if (sample1 < -32768) sample1 = -32768;
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else if (sample1 > 32767) sample1 = 32767;
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*dest = (int16_t) sample0;
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*(dest + MV_RightChannelOffset/2) = (int16_t) sample1;
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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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