e221c6b5ca
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@5220 fc73d0e0-1445-4013-8a0c-d673dee63da5
717 lines
19 KiB
C
717 lines
19 KiB
C
/*
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Copyright (C) 1996-1997 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 "quakedef.h"
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#ifdef HAVE_MIXER
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#define PAINTBUFFER_SIZE 2048
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portable_samplegroup_t paintbuffer[PAINTBUFFER_SIZE]; //FIXME: we really ought to be using SSE and floats or something.
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int *snd_p, snd_vol;
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short *snd_out;
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void S_TransferPaintBuffer(soundcardinfo_t *sc, int endtime)
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{
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unsigned int out_idx;
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unsigned int count;
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unsigned int outlimit;
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int *p;
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int val;
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// int snd_vol;
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short *pbuf;
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int i, numc;
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p = (int *) paintbuffer;
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count = (endtime - sc->paintedtime) * sc->sn.numchannels;
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outlimit = sc->sn.samples;
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out_idx = (sc->paintedtime * sc->sn.numchannels) % outlimit;
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// snd_vol = (volume.value*voicevolumemod)*256;
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numc = sc->sn.numchannels;
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pbuf = sc->Lock(sc, &out_idx);
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if (!pbuf)
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return;
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switch(sc->sn.sampleformat)
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{
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case QSF_INVALID: //erk...
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case QSF_EXTERNALMIXER: //shouldn't reach this.
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break;
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case QSF_U8:
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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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for (i = 0; i < numc; i++)
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{
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val = *p++;// * snd_vol) >> 8;
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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) % outlimit;
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}
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p += MAXSOUNDCHANNELS - numc;
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count -= numc;
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}
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}
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break;
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case QSF_S8:
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{
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char *out = (char *) pbuf;
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while (count)
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{
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for (i = 0; i < numc; i++)
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{
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val = *p++;// * snd_vol) >> 8;
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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);
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out_idx = (out_idx + 1) % outlimit;
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}
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p += MAXSOUNDCHANNELS - numc;
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count -= numc;
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}
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}
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break;
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case QSF_S16:
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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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for (i = 0; i < numc; i++)
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{
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val = *p++;// * snd_vol) >> 8;
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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) % outlimit;
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}
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p += MAXSOUNDCHANNELS - numc;
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count -= numc;
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}
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}
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break;
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case QSF_F32:
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{
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float *out = (float *) pbuf;
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while (count)
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{
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for (i = 0; i < numc; i++)
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{
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out[out_idx] = *p++ * (1.0 / 32768);
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out_idx = (out_idx + 1) % outlimit;
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}
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p += MAXSOUNDCHANNELS - numc;
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count -= numc;
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}
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}
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break;
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}
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sc->Unlock(sc, pbuf);
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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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static void SND_PaintChannel8_O2I1 (channel_t *ch, sfxcache_t *sc, int starttime, int count);
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static void SND_PaintChannel16_O2I1 (channel_t *ch, sfxcache_t *sc, int starttime, int count);
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static void SND_PaintChannel8_O4I1 (channel_t *ch, sfxcache_t *sc, int count);
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static void SND_PaintChannel16_O4I1 (channel_t *ch, sfxcache_t *sc, int count);
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static void SND_PaintChannel8_O6I1 (channel_t *ch, sfxcache_t *sc, int count);
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static void SND_PaintChannel16_O6I1 (channel_t *ch, sfxcache_t *sc, int count);
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static void SND_PaintChannel8_O8I1 (channel_t *ch, sfxcache_t *sc, int count);
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static void SND_PaintChannel16_O8I1 (channel_t *ch, sfxcache_t *sc, int count);
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static void SND_PaintChannel8_O2I2 (channel_t *ch, sfxcache_t *sc, int starttime, int count);
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static void SND_PaintChannel16_O2I2 (channel_t *ch, sfxcache_t *sc, int starttime, int count);
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//NOTE: MAY NOT CALL SYS_ERROR
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void S_PaintChannels(soundcardinfo_t *sc, 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 scachebuf;
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sfxcache_t *scache;
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sfx_t *s;
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int ltime, count;
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int avail;
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unsigned int maxlen = ruleset_allow_overlongsounds.ival?0xffffffffu>>PITCHSHIFT:snd_speed*20;
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while (sc->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 - sc->paintedtime > PAINTBUFFER_SIZE)
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end = sc->paintedtime + PAINTBUFFER_SIZE;
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// clear the paint buffer
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Q_memset(paintbuffer, 0, (end - sc->paintedtime) * sizeof(portable_samplegroup_t));
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// paint in the channels.
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ch = sc->channel;
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for (i=0; i<sc->total_chans ; i++, ch++)
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{
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s = ch->sfx;
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if (!s || s->loadstate == SLS_LOADING)
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continue;
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if (!ch->vol[0] && !ch->vol[1] && !ch->vol[2] && !ch->vol[3] && !ch->vol[4] && !ch->vol[5])
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{
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//does it still make a sound if it cannot be heard?...
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//technically no...
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//this code is hacky.
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if (s->decoder.querydata)
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s->decoder.querydata(s, scache=&scachebuf, NULL, 0);
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else if (s->decoder.decodedata)
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scache = s->decoder.decodedata(s, &scachebuf, ch->pos>>PITCHSHIFT, 0); /*1 for luck - balances audio termination below*/
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else
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scache = s->decoder.buf;
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ch->pos += (end-sc->paintedtime)*ch->rate;
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if (!scache || (ch->pos>>PITCHSHIFT) > scache->soundoffset+scache->length)
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{
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ch->pos = 0;
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if (s->loopstart != -1)
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ch->pos = s->loopstart<<PITCHSHIFT;
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else if (!(ch->flags & CF_FORCELOOP))
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{
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ch->sfx = NULL;
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if (s->decoder.ended)
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{
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if (!S_IsPlayingSomewhere(s))
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s->decoder.ended(s);
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}
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}
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}
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continue;
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}
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ltime = sc->paintedtime;
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while (ltime < end)
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{
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ssamplepos_t spos = ch->pos>>PITCHSHIFT;
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if (s->decoder.decodedata)
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scache = s->decoder.decodedata(s, &scachebuf, spos, 1 + (((end - ltime) * ch->rate)>>PITCHSHIFT)); /*1 for luck - balances audio termination below*/
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else if (s->decoder.buf)
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{
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scache = s->decoder.buf;
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if (spos >= scache->length)
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scache = NULL; //EOF
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}
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else
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scache = NULL;
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if (!scache)
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{ //hit eof, loop it or stop it
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if (s->loopstart != -1) /*some wavs contain a loop offset directly in the sound file, such samples loop even if a non-looping builtin was used*/
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{
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ch->pos &= ~((-1)<<PITCHSHIFT); /*clear out all but the subsample offset*/
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ch->pos += s->loopstart<<PITCHSHIFT; //ignore the offset if its off the end of the file
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}
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else if (ch->flags & CF_FORCELOOP) /*(static)channels which are explicitly looping always loop from the start*/
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{
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/*restart it*/
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ch->pos = 0;
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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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if (s->decoder.ended)
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{
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if (!S_IsPlayingSomewhere(s))
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s->decoder.ended(s);
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}
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break;
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}
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//retry at that new offset (continue here could give an infinite loop)
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spos = ch->pos>>PITCHSHIFT;
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if (s->decoder.decodedata)
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scache = s->decoder.decodedata(s, &scachebuf, spos, 1 + (((end - ltime) * ch->rate)>>PITCHSHIFT)); /*1 for luck - balances audio termination below*/
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else if (s->decoder.buf)
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{
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scache = s->decoder.buf;
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if (spos >= scache->length)
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scache = NULL; //EOF
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}
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else
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scache = NULL;
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if (!scache)
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break;
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}
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if (spos < scache->soundoffset || spos > scache->soundoffset+scache->length)
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avail = 0; //urm, we would be trying to read outside of the buffer. let mixing slip when there's no data available yet.
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else
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{
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// find how many samples till the sample ends (clamp max length)
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avail = scache->length;
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if (avail > maxlen)
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avail = snd_speed*10;
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avail = (((int)(scache->soundoffset + avail)<<PITCHSHIFT) - ch->pos + (ch->rate-1)) / ch->rate;
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}
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// mix the smaller of how much is available or the time left
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count = min(avail, end - ltime);
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if (count > 0)
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{
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if (ch->pos < 0) //sounds with a pos of 0 are delay-start sounds
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{
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//don't progress past 0, so it actually starts properly at the right time with no clicks or anything
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if (count > (-ch->pos+255)>>PITCHSHIFT)
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count = ((-ch->pos+255)>>PITCHSHIFT);
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ltime += count;
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ch->pos += count*ch->rate;
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continue;
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}
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if (scache->width == 1)
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{
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if (scache->numchannels==2)
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SND_PaintChannel8_O2I2(ch, scache, ltime-sc->paintedtime, count);
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else if (sc->sn.numchannels <= 2)
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SND_PaintChannel8_O2I1(ch, scache, ltime-sc->paintedtime, count);
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else if (sc->sn.numchannels <= 4)
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SND_PaintChannel8_O4I1(ch, scache, count);
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else if (sc->sn.numchannels <= 6)
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SND_PaintChannel8_O6I1(ch, scache, count);
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else
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SND_PaintChannel8_O8I1(ch, scache, count);
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}
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else if (scache->width == 2)
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{
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if (scache->numchannels==2)
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SND_PaintChannel16_O2I2(ch, scache, ltime-sc->paintedtime, count);
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else if (sc->sn.numchannels <= 2)
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SND_PaintChannel16_O2I1(ch, scache, ltime-sc->paintedtime, count);
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else if (sc->sn.numchannels <= 4)
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SND_PaintChannel16_O4I1(ch, scache, count);
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else if (sc->sn.numchannels <= 6)
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SND_PaintChannel16_O6I1(ch, scache, count);
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else
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SND_PaintChannel16_O8I1(ch, scache, count);
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}
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ltime += count;
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ch->pos += ch->rate * count;
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}
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else
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break;
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}
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}
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// transfer out according to DMA format
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S_TransferPaintBuffer(sc, end);
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sc->paintedtime = end;
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}
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}
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static void SND_PaintChannel8_O2I1 (channel_t *ch, sfxcache_t *sc, int starttime, int count)
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{
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int data;
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signed char *sfx;
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int i;
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unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
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if (ch->rate != (1<<PITCHSHIFT))
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{
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sfx = (signed char *)sc->data;
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for (i=0 ; i<count ; i++)
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{
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data = sfx[pos>>PITCHSHIFT];
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pos += ch->rate;
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paintbuffer[starttime+i].s[0] += ch->vol[0] * data;
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paintbuffer[starttime+i].s[1] += ch->vol[1] * data;
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}
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}
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else
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{
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sfx = (signed char *)sc->data + (pos>>PITCHSHIFT);
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for (i=0 ; i<count ; i++)
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{
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data = sfx[i];
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paintbuffer[starttime+i].s[0] += ch->vol[0] * data;
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paintbuffer[starttime+i].s[1] += ch->vol[1] * data;
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}
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}
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}
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static void SND_PaintChannel8_O2I2 (channel_t *ch, sfxcache_t *sc, int starttime, int count)
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{
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// int data;
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signed char *sfx;
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int i;
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unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
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if (ch->rate != (1<<PITCHSHIFT))
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{
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sfx = (signed char *)sc->data;
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for (i=0 ; i<count ; i++)
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{
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paintbuffer[starttime+i].s[0] += ch->vol[0] * sfx[(pos>>(PITCHSHIFT-1))&~1];
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paintbuffer[starttime+i].s[1] += ch->vol[1] * sfx[(pos>>(PITCHSHIFT-1))|1];
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pos += ch->rate;
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}
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}
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else
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{
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sfx = (signed char *)sc->data + (pos>>PITCHSHIFT)*2;
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for (i=0 ; i<count ; i++)
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{
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paintbuffer[starttime+i].s[0] += ch->vol[0] * sfx[(i<<1)];
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paintbuffer[starttime+i].s[1] += ch->vol[1] * sfx[(i<<1)+1];
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}
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}
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}
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static void SND_PaintChannel8_O4I1 (channel_t *ch, sfxcache_t *sc, int count)
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{
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signed char *sfx;
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int i;
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unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
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if (ch->rate != (1<<PITCHSHIFT))
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{
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signed char data;
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sfx = (signed char *)sc->data;
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for (i=0 ; i<count ; i++)
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{
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data = sfx[pos>>PITCHSHIFT];
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pos += ch->rate;
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paintbuffer[i].s[0] += ch->vol[0] * data;
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paintbuffer[i].s[1] += ch->vol[1] * data;
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paintbuffer[i].s[2] += ch->vol[2] * data;
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paintbuffer[i].s[3] += ch->vol[3] * data;
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}
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}
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else
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{
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sfx = (signed char *)sc->data + (pos>>PITCHSHIFT);
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for (i=0 ; i<count ; i++)
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{
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paintbuffer[i].s[0] += ch->vol[0] * sfx[i];
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paintbuffer[i].s[1] += ch->vol[1] * sfx[i];
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paintbuffer[i].s[2] += ch->vol[2] * sfx[i];
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paintbuffer[i].s[3] += ch->vol[3] * sfx[i];
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}
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}
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}
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static void SND_PaintChannel8_O6I1 (channel_t *ch, sfxcache_t *sc, int count)
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{
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signed char *sfx;
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int i;
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unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
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if (ch->rate != (1<<PITCHSHIFT))
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{
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signed char data;
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sfx = (signed char *)sc->data;
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for (i=0 ; i<count ; i++)
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{
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data = sfx[pos>>PITCHSHIFT];
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pos += ch->rate;
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paintbuffer[i].s[0] += ch->vol[0] * data;
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paintbuffer[i].s[1] += ch->vol[1] * data;
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paintbuffer[i].s[2] += ch->vol[2] * data;
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paintbuffer[i].s[3] += ch->vol[3] * data;
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paintbuffer[i].s[4] += ch->vol[4] * data;
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paintbuffer[i].s[5] += ch->vol[5] * data;
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}
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}
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else
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{
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sfx = (signed char *)sc->data + (pos>>PITCHSHIFT);
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for (i=0 ; i<count ; i++)
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{
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paintbuffer[i].s[0] += ch->vol[0] * sfx[i];
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paintbuffer[i].s[1] += ch->vol[1] * sfx[i];
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paintbuffer[i].s[2] += ch->vol[2] * sfx[i];
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paintbuffer[i].s[3] += ch->vol[3] * sfx[i];
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paintbuffer[i].s[4] += ch->vol[4] * sfx[i];
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paintbuffer[i].s[5] += ch->vol[5] * sfx[i];
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}
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}
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}
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static void SND_PaintChannel8_O8I1 (channel_t *ch, sfxcache_t *sc, int count)
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{
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signed char *sfx;
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int i;
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unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
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if (ch->rate != (1<<PITCHSHIFT))
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{
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signed char data;
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sfx = (signed char *)sc->data;
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for (i=0 ; i<count ; i++)
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{
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data = sfx[pos>>PITCHSHIFT];
|
|
pos += ch->rate;
|
|
paintbuffer[i].s[0] += ch->vol[0] * data;
|
|
paintbuffer[i].s[1] += ch->vol[1] * data;
|
|
paintbuffer[i].s[2] += ch->vol[2] * data;
|
|
paintbuffer[i].s[3] += ch->vol[3] * data;
|
|
paintbuffer[i].s[4] += ch->vol[4] * data;
|
|
paintbuffer[i].s[5] += ch->vol[5] * data;
|
|
paintbuffer[i].s[6] += ch->vol[6] * data;
|
|
paintbuffer[i].s[7] += ch->vol[7] * data;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sfx = (signed char *)sc->data + (pos>>PITCHSHIFT);
|
|
for (i=0 ; i<count ; i++)
|
|
{
|
|
paintbuffer[i].s[0] += ch->vol[0] * sfx[i];
|
|
paintbuffer[i].s[1] += ch->vol[1] * sfx[i];
|
|
paintbuffer[i].s[2] += ch->vol[2] * sfx[i];
|
|
paintbuffer[i].s[3] += ch->vol[3] * sfx[i];
|
|
paintbuffer[i].s[4] += ch->vol[4] * sfx[i];
|
|
paintbuffer[i].s[5] += ch->vol[5] * sfx[i];
|
|
paintbuffer[i].s[6] += ch->vol[6] * sfx[i];
|
|
paintbuffer[i].s[7] += ch->vol[7] * sfx[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void SND_PaintChannel16_O2I1 (channel_t *ch, sfxcache_t *sc, int starttime, int count)
|
|
{
|
|
int data;
|
|
int left, right;
|
|
int leftvol, rightvol;
|
|
signed short *sfx;
|
|
int i;
|
|
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
|
|
|
|
leftvol = ch->vol[0];
|
|
rightvol = ch->vol[1];
|
|
|
|
if (ch->rate != (1<<PITCHSHIFT))
|
|
{
|
|
signed short data;
|
|
sfx = (signed short *)sc->data;
|
|
for (i=0 ; i<count ; i++)
|
|
{
|
|
float frac = pos&((1<<PITCHSHIFT)-1);
|
|
data = sfx[pos>>PITCHSHIFT] * (1-frac) + sfx[(pos>>PITCHSHIFT)+1] * frac;
|
|
pos += ch->rate;
|
|
paintbuffer[starttime+i].s[0] += (leftvol * data)>>8;
|
|
paintbuffer[starttime+i].s[1] += (rightvol * data)>>8;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sfx = (signed short *)sc->data + (pos>>PITCHSHIFT);
|
|
for (i=0 ; i<count ; i++)
|
|
{
|
|
data = sfx[i];
|
|
left = (data * leftvol) >> 8;
|
|
right = (data * rightvol) >> 8;
|
|
paintbuffer[starttime+i].s[0] += left;
|
|
paintbuffer[starttime+i].s[1] += right;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void SND_PaintChannel16_O2I2 (channel_t *ch, sfxcache_t *sc, int starttime, int count)
|
|
{
|
|
int leftvol, rightvol;
|
|
signed short *sfx;
|
|
int i;
|
|
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
|
|
|
|
leftvol = ch->vol[0];
|
|
rightvol = ch->vol[1];
|
|
|
|
if (ch->rate != (1<<PITCHSHIFT))
|
|
{
|
|
signed short l, r;
|
|
sfx = (signed short *)sc->data;
|
|
for (i=0 ; i<count ; i++)
|
|
{
|
|
l = sfx[(pos>>(PITCHSHIFT-1))&~1];
|
|
r = sfx[(pos>>(PITCHSHIFT-1))|1];
|
|
pos += ch->rate;
|
|
paintbuffer[starttime+i].s[0] += (ch->vol[0] * l)>>8;
|
|
paintbuffer[starttime+i].s[1] += (ch->vol[1] * r)>>8;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sfx = (signed short *)sc->data + (pos>>PITCHSHIFT)*2;
|
|
for (i=0 ; i<count ; i++)
|
|
{
|
|
paintbuffer[starttime+i].s[0] += (*sfx++ * leftvol) >> 8;
|
|
paintbuffer[starttime+i].s[1] += (*sfx++ * rightvol) >> 8;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void SND_PaintChannel16_O4I1 (channel_t *ch, sfxcache_t *sc, int count)
|
|
{
|
|
int vol[4];
|
|
signed short *sfx;
|
|
int i;
|
|
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
|
|
|
|
vol[0] = ch->vol[0];
|
|
vol[1] = ch->vol[1];
|
|
vol[2] = ch->vol[2];
|
|
vol[3] = ch->vol[3];
|
|
|
|
if (ch->rate != (1<<PITCHSHIFT))
|
|
{
|
|
signed short data;
|
|
sfx = (signed short *)sc->data;
|
|
for (i=0 ; i<count ; i++)
|
|
{
|
|
data = sfx[pos>>PITCHSHIFT];
|
|
pos += ch->rate;
|
|
paintbuffer[i].s[0] += (vol[0] * data)>>8;
|
|
paintbuffer[i].s[1] += (vol[1] * data)>>8;
|
|
paintbuffer[i].s[2] += (vol[2] * data)>>8;
|
|
paintbuffer[i].s[3] += (vol[3] * data)>>8;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sfx = (signed short *)sc->data + pos;
|
|
for (i=0 ; i<count ; i++)
|
|
{
|
|
paintbuffer[i].s[0] += (sfx[i] * vol[0]) >> 8;
|
|
paintbuffer[i].s[1] += (sfx[i] * vol[1]) >> 8;
|
|
paintbuffer[i].s[2] += (sfx[i] * vol[2]) >> 8;
|
|
paintbuffer[i].s[3] += (sfx[i] * vol[3]) >> 8;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void SND_PaintChannel16_O6I1 (channel_t *ch, sfxcache_t *sc, int count)
|
|
{
|
|
int vol[6];
|
|
signed short *sfx;
|
|
int i;
|
|
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
|
|
|
|
vol[0] = ch->vol[0];
|
|
vol[1] = ch->vol[1];
|
|
vol[2] = ch->vol[2];
|
|
vol[3] = ch->vol[3];
|
|
vol[4] = ch->vol[4];
|
|
vol[5] = ch->vol[5];
|
|
|
|
if (ch->rate != (1<<PITCHSHIFT))
|
|
{
|
|
signed short data;
|
|
sfx = (signed short *)sc->data;
|
|
for (i=0 ; i<count ; i++)
|
|
{
|
|
data = sfx[pos>>PITCHSHIFT];
|
|
pos += ch->rate;
|
|
paintbuffer[i].s[0] += (vol[0] * data)>>8;
|
|
paintbuffer[i].s[1] += (vol[1] * data)>>8;
|
|
paintbuffer[i].s[2] += (vol[2] * data)>>8;
|
|
paintbuffer[i].s[3] += (vol[3] * data)>>8;
|
|
paintbuffer[i].s[4] += (vol[4] * data)>>8;
|
|
paintbuffer[i].s[5] += (vol[5] * data)>>8;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sfx = (signed short *)sc->data + (pos>>PITCHSHIFT);
|
|
for (i=0 ; i<count ; i++)
|
|
{
|
|
paintbuffer[i].s[0] += (sfx[i] * vol[0]) >> 8;
|
|
paintbuffer[i].s[1] += (sfx[i] * vol[1]) >> 8;
|
|
paintbuffer[i].s[2] += (sfx[i] * vol[2]) >> 8;
|
|
paintbuffer[i].s[3] += (sfx[i] * vol[3]) >> 8;
|
|
paintbuffer[i].s[4] += (sfx[i] * vol[4]) >> 8;
|
|
paintbuffer[i].s[5] += (sfx[i] * vol[5]) >> 8;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void SND_PaintChannel16_O8I1 (channel_t *ch, sfxcache_t *sc, int count)
|
|
{
|
|
int vol[8];
|
|
signed short *sfx;
|
|
int i;
|
|
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
|
|
|
|
vol[0] = ch->vol[0];
|
|
vol[1] = ch->vol[1];
|
|
vol[2] = ch->vol[2];
|
|
vol[3] = ch->vol[3];
|
|
vol[4] = ch->vol[4];
|
|
vol[5] = ch->vol[5];
|
|
vol[6] = ch->vol[6];
|
|
vol[7] = ch->vol[7];
|
|
|
|
if (ch->rate != (1<<PITCHSHIFT))
|
|
{
|
|
signed short data;
|
|
sfx = (signed short *)sc->data;
|
|
for (i=0 ; i<count ; i++)
|
|
{
|
|
data = sfx[pos>>PITCHSHIFT];
|
|
pos += ch->rate;
|
|
paintbuffer[i].s[0] += (vol[0] * data)>>8;
|
|
paintbuffer[i].s[1] += (vol[1] * data)>>8;
|
|
paintbuffer[i].s[2] += (vol[2] * data)>>8;
|
|
paintbuffer[i].s[3] += (vol[3] * data)>>8;
|
|
paintbuffer[i].s[4] += (vol[4] * data)>>8;
|
|
paintbuffer[i].s[5] += (vol[5] * data)>>8;
|
|
paintbuffer[i].s[6] += (vol[6] * data)>>8;
|
|
paintbuffer[i].s[7] += (vol[7] * data)>>8;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sfx = (signed short *)sc->data + (pos>>PITCHSHIFT);
|
|
for (i=0 ; i<count ; i++)
|
|
{
|
|
paintbuffer[i].s[0] += (sfx[i] * vol[0]) >> 8;
|
|
paintbuffer[i].s[1] += (sfx[i] * vol[1]) >> 8;
|
|
paintbuffer[i].s[2] += (sfx[i] * vol[2]) >> 8;
|
|
paintbuffer[i].s[3] += (sfx[i] * vol[3]) >> 8;
|
|
paintbuffer[i].s[4] += (sfx[i] * vol[4]) >> 8;
|
|
paintbuffer[i].s[5] += (sfx[i] * vol[5]) >> 8;
|
|
paintbuffer[i].s[6] += (sfx[i] * vol[6]) >> 8;
|
|
paintbuffer[i].s[7] += (sfx[i] * vol[7]) >> 8;
|
|
}
|
|
}
|
|
}
|
|
#endif
|