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https://git.code.sf.net/p/quake/quake2forge
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499 lines
10 KiB
C
499 lines
10 KiB
C
/*
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Copyright (C) 1997-2001 Id Software, Inc.
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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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// snd_mix.c -- portable code to mix sounds for snd_dma.c
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#include "client.h"
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#include "snd_loc.h"
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#define PAINTBUFFER_SIZE 2048
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portable_samplepair_t paintbuffer[PAINTBUFFER_SIZE];
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int snd_scaletable[32][256];
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int *snd_p, snd_linear_count, snd_vol;
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short *snd_out;
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void S_WriteLinearBlastStereo16 (void);
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#if !(defined __linux__ && defined __i386__)
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#if !id386
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void S_WriteLinearBlastStereo16 (void)
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{
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int i;
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int val;
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for (i=0 ; i<snd_linear_count ; i+=2)
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{
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val = snd_p[i]>>8;
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if (val > 0x7fff)
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snd_out[i] = 0x7fff;
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else if (val < (short)0x8000)
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snd_out[i] = (short)0x8000;
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else
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snd_out[i] = val;
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val = snd_p[i+1]>>8;
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if (val > 0x7fff)
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snd_out[i+1] = 0x7fff;
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else if (val < (short)0x8000)
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snd_out[i+1] = (short)0x8000;
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else
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snd_out[i+1] = val;
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}
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}
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#else
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__declspec( naked ) void S_WriteLinearBlastStereo16 (void)
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{
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__asm {
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push edi
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push ebx
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mov ecx,ds:dword ptr[snd_linear_count]
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mov ebx,ds:dword ptr[snd_p]
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mov edi,ds:dword ptr[snd_out]
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LWLBLoopTop:
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mov eax,ds:dword ptr[-8+ebx+ecx*4]
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sar eax,8
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cmp eax,07FFFh
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jg LClampHigh
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cmp eax,0FFFF8000h
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jnl LClampDone
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mov eax,0FFFF8000h
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jmp LClampDone
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LClampHigh:
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mov eax,07FFFh
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LClampDone:
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mov edx,ds:dword ptr[-4+ebx+ecx*4]
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sar edx,8
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cmp edx,07FFFh
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jg LClampHigh2
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cmp edx,0FFFF8000h
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jnl LClampDone2
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mov edx,0FFFF8000h
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jmp LClampDone2
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LClampHigh2:
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mov edx,07FFFh
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LClampDone2:
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shl edx,16
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and eax,0FFFFh
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or edx,eax
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mov ds:dword ptr[-4+edi+ecx*2],edx
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sub ecx,2
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jnz LWLBLoopTop
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pop ebx
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pop edi
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ret
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}
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}
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#endif
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#endif
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void S_TransferStereo16 (unsigned long *pbuf, int endtime)
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{
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int lpos;
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int lpaintedtime;
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snd_p = (int *) paintbuffer;
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lpaintedtime = paintedtime;
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while (lpaintedtime < endtime)
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{
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// handle recirculating buffer issues
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lpos = lpaintedtime & ((dma.samples>>1)-1);
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snd_out = (short *) pbuf + (lpos<<1);
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snd_linear_count = (dma.samples>>1) - lpos;
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if (lpaintedtime + snd_linear_count > endtime)
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snd_linear_count = endtime - lpaintedtime;
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snd_linear_count <<= 1;
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// write a linear blast of samples
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S_WriteLinearBlastStereo16 ();
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snd_p += snd_linear_count;
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lpaintedtime += (snd_linear_count>>1);
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}
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}
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/*
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===================
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S_TransferPaintBuffer
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===================
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*/
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void S_TransferPaintBuffer(int endtime)
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{
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int out_idx;
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int count;
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int out_mask;
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int *p;
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int step;
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int val;
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unsigned long *pbuf;
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pbuf = (unsigned long *)dma.buffer;
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if (s_testsound->value)
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{
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int i;
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int count;
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// write a fixed sine wave
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count = (endtime - paintedtime);
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for (i=0 ; i<count ; i++)
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paintbuffer[i].left = paintbuffer[i].right = sin((paintedtime+i)*0.1)*20000*256;
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}
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if (dma.samplebits == 16 && dma.channels == 2)
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{ // optimized case
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S_TransferStereo16 (pbuf, endtime);
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}
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else
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{ // general case
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p = (int *) paintbuffer;
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count = (endtime - paintedtime) * dma.channels;
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out_mask = dma.samples - 1;
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out_idx = paintedtime * dma.channels & out_mask;
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step = 3 - dma.channels;
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if (dma.samplebits == 16)
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{
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short *out = (short *) pbuf;
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while (count--)
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{
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val = *p >> 8;
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p+= step;
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if (val > 0x7fff)
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val = 0x7fff;
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else if (val < (short)0x8000)
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val = (short)0x8000;
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out[out_idx] = val;
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out_idx = (out_idx + 1) & out_mask;
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}
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}
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else if (dma.samplebits == 8)
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{
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unsigned char *out = (unsigned char *) pbuf;
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while (count--)
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{
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val = *p >> 8;
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p+= step;
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if (val > 0x7fff)
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val = 0x7fff;
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else if (val < (short)0x8000)
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val = (short)0x8000;
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out[out_idx] = (val>>8) + 128;
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out_idx = (out_idx + 1) & out_mask;
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}
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}
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}
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}
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/*
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===============================================================================
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CHANNEL MIXING
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===============================================================================
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*/
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void S_PaintChannelFrom8 (channel_t *ch, sfxcache_t *sc, int endtime, int offset);
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void S_PaintChannelFrom16 (channel_t *ch, sfxcache_t *sc, int endtime, int offset);
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void S_PaintChannels(int endtime)
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{
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int i;
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int end;
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channel_t *ch;
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sfxcache_t *sc;
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int ltime, count;
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playsound_t *ps;
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snd_vol = s_volume->value*256;
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//Com_Printf ("%i to %i\n", paintedtime, endtime);
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while (paintedtime < endtime)
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{
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// if paintbuffer is smaller than DMA buffer
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end = endtime;
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if (endtime - paintedtime > PAINTBUFFER_SIZE)
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end = paintedtime + PAINTBUFFER_SIZE;
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// start any playsounds
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while (1)
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{
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ps = s_pendingplays.next;
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if (ps == &s_pendingplays)
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break; // no more pending sounds
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if (ps->begin <= paintedtime)
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{
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S_IssuePlaysound (ps);
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continue;
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}
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if (ps->begin < end)
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end = ps->begin; // stop here
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break;
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}
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// clear the paint buffer
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if (s_rawend < paintedtime)
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{
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// Com_Printf ("clear\n");
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memset(paintbuffer, 0, (end - paintedtime) * sizeof(portable_samplepair_t));
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}
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else
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{ // copy from the streaming sound source
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int s;
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int stop;
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stop = (end < s_rawend) ? end : s_rawend;
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for (i=paintedtime ; i<stop ; i++)
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{
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s = i&(MAX_RAW_SAMPLES-1);
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paintbuffer[i-paintedtime] = s_rawsamples[s];
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}
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// if (i != end)
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// Com_Printf ("partial stream\n");
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// else
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// Com_Printf ("full stream\n");
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for ( ; i<end ; i++)
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{
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paintbuffer[i-paintedtime].left =
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paintbuffer[i-paintedtime].right = 0;
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}
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}
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// paint in the channels.
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ch = channels;
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for (i=0; i<MAX_CHANNELS ; i++, ch++)
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{
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ltime = paintedtime;
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while (ltime < end)
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{
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if (!ch->sfx || (!ch->leftvol && !ch->rightvol) )
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break;
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// max painting is to the end of the buffer
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count = end - ltime;
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// might be stopped by running out of data
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if (ch->end - ltime < count)
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count = ch->end - ltime;
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sc = S_LoadSound (ch->sfx);
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if (!sc)
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break;
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if (count > 0 && ch->sfx)
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{
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if (sc->width == 1)// FIXME; 8 bit asm is wrong now
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S_PaintChannelFrom8(ch, sc, count, ltime - paintedtime);
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else
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S_PaintChannelFrom16(ch, sc, count, ltime - paintedtime);
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ltime += count;
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}
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// if at end of loop, restart
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if (ltime >= ch->end)
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{
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if (ch->autosound)
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{ // autolooping sounds always go back to start
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ch->pos = 0;
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ch->end = ltime + sc->length;
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}
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else if (sc->loopstart >= 0)
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{
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ch->pos = sc->loopstart;
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ch->end = ltime + sc->length - ch->pos;
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}
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else
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{ // channel just stopped
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ch->sfx = NULL;
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}
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}
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}
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}
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// transfer out according to DMA format
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S_TransferPaintBuffer(end);
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paintedtime = end;
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}
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}
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void S_InitScaletable (void)
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{
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int i, j;
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int scale;
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s_volume->modified = false;
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for (i=0 ; i<32 ; i++)
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{
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scale = i * 8 * 256 * s_volume->value;
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for (j=0 ; j<256 ; j++)
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snd_scaletable[i][j] = ((signed char)j) * scale;
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}
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}
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#if !(defined __linux__ && defined __i386__)
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#if !id386
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void S_PaintChannelFrom8 (channel_t *ch, sfxcache_t *sc, int count, int offset)
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{
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int data;
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int *lscale, *rscale;
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unsigned char *sfx;
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int i;
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portable_samplepair_t *samp;
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if (ch->leftvol > 255)
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ch->leftvol = 255;
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if (ch->rightvol > 255)
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ch->rightvol = 255;
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//ZOID-- >>11 has been changed to >>3, >>11 didn't make much sense
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//as it would always be zero.
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lscale = snd_scaletable[ ch->leftvol >> 3];
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rscale = snd_scaletable[ ch->rightvol >> 3];
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sfx = (signed char *)sc->data + ch->pos;
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samp = &paintbuffer[offset];
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for (i=0 ; i<count ; i++, samp++)
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{
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data = sfx[i];
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samp->left += lscale[data];
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samp->right += rscale[data];
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}
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ch->pos += count;
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}
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#else
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__declspec( naked ) void S_PaintChannelFrom8 (channel_t *ch, sfxcache_t *sc, int count, int offset)
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{
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__asm {
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push esi
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push edi
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push ebx
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push ebp
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mov ebx,ds:dword ptr[4+16+esp]
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mov esi,ds:dword ptr[8+16+esp]
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mov eax,ds:dword ptr[4+ebx]
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mov edx,ds:dword ptr[8+ebx]
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cmp eax,255
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jna LLeftSet
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mov eax,255
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LLeftSet:
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cmp edx,255
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jna LRightSet
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mov edx,255
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LRightSet:
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and eax,0F8h
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add esi,20
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and edx,0F8h
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mov edi,ds:dword ptr[16+ebx]
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mov ecx,ds:dword ptr[12+16+esp]
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add esi,edi
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shl eax,7
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add edi,ecx
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shl edx,7
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mov ds:dword ptr[16+ebx],edi
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add eax,offset snd_scaletable
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add edx,offset snd_scaletable
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sub ebx,ebx
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mov bl,ds:byte ptr[-1+esi+ecx*1]
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test ecx,1
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jz LMix8Loop
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mov edi,ds:dword ptr[eax+ebx*4]
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mov ebp,ds:dword ptr[edx+ebx*4]
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add edi,ds:dword ptr[paintbuffer+0-8+ecx*8]
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add ebp,ds:dword ptr[paintbuffer+4-8+ecx*8]
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mov ds:dword ptr[paintbuffer+0-8+ecx*8],edi
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mov ds:dword ptr[paintbuffer+4-8+ecx*8],ebp
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mov bl,ds:byte ptr[-2+esi+ecx*1]
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dec ecx
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jz LDone
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LMix8Loop:
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mov edi,ds:dword ptr[eax+ebx*4]
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mov ebp,ds:dword ptr[edx+ebx*4]
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add edi,ds:dword ptr[paintbuffer+0-8+ecx*8]
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add ebp,ds:dword ptr[paintbuffer+4-8+ecx*8]
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mov bl,ds:byte ptr[-2+esi+ecx*1]
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mov ds:dword ptr[paintbuffer+0-8+ecx*8],edi
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mov ds:dword ptr[paintbuffer+4-8+ecx*8],ebp
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mov edi,ds:dword ptr[eax+ebx*4]
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mov ebp,ds:dword ptr[edx+ebx*4]
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mov bl,ds:byte ptr[-3+esi+ecx*1]
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add edi,ds:dword ptr[paintbuffer+0-8*2+ecx*8]
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add ebp,ds:dword ptr[paintbuffer+4-8*2+ecx*8]
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mov ds:dword ptr[paintbuffer+0-8*2+ecx*8],edi
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mov ds:dword ptr[paintbuffer+4-8*2+ecx*8],ebp
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sub ecx,2
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jnz LMix8Loop
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LDone:
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pop ebp
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pop ebx
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pop edi
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pop esi
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ret
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}
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}
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#endif
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#endif
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void S_PaintChannelFrom16 (channel_t *ch, sfxcache_t *sc, int count, int offset)
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{
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int data;
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int left, right;
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int leftvol, rightvol;
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signed short *sfx;
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int i;
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portable_samplepair_t *samp;
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leftvol = ch->leftvol*snd_vol;
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rightvol = ch->rightvol*snd_vol;
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sfx = (signed short *)sc->data + ch->pos;
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samp = &paintbuffer[offset];
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for (i=0 ; i<count ; i++, samp++)
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{
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data = sfx[i];
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left = (data * leftvol)>>8;
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right = (data * rightvol)>>8;
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samp->left += left;
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samp->right += right;
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}
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ch->pos += count;
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}
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