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snes_snd: Rework SYMBOLS=1 fix to not destroy the output samples (no whatsnew)

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This commit is contained in:
R. Belmont 2010-05-01 21:10:46 +00:00
parent 5840be5e21
commit 63e07ca81e
1 changed files with 3 additions and 3 deletions
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6
src/mame/audio/snes_snd.c
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@ -126,7 +126,7 @@ static const int gauss[]=
static const int *const G1 = &gauss[256]; static const int *const G1 = &gauss[256];
static const int *const G2 = &gauss[512]; static const int *const G2 = &gauss[512];
static const int *const G3 = &gauss[255]; static const int *const G3 = &gauss[255];
static const int *const G4 = &gauss[511]; static const int *const G4 = &gauss[0];
static const int mask = 0xFF; static const int mask = 0xFF;
@ -588,7 +588,7 @@ static void dsp_update( running_device *device, short *sound_ptr )
the sum of the products of each input sample point with the value the sum of the products of each input sample point with the value
of the bell-curve corresponding to that point. */ of the bell-curve corresponding to that point. */
vl = vp->mixfrac >> 4; vl = vp->mixfrac >> 4;
vr = ((G4[-vl] * vp->sampbuf[vp->sampptr]) >> 11 ) & ~1; vr = ((G4[-vl-1] * vp->sampbuf[vp->sampptr]) >> 11 ) & ~1;
vr += ((G3[-vl] * vp->sampbuf[(vp->sampptr + 1) & 3]) >> 11) & ~1; vr += ((G3[-vl] * vp->sampbuf[(vp->sampptr + 1) & 3]) >> 11) & ~1;
vr += ((G2[vl] * vp->sampbuf[(vp->sampptr + 2) & 3]) >> 11 ) & ~1; vr += ((G2[vl] * vp->sampbuf[(vp->sampptr + 2) & 3]) >> 11 ) & ~1;
@ -614,7 +614,7 @@ static void dsp_update( running_device *device, short *sound_ptr )
vp->sampbuf[(vp->sampptr + 2) & 3], vp->sampbuf[(vp->sampptr + 2) & 3],
G3[-vl], G3[-vl],
vp->sampbuf[(vp->sampptr + 1) & 3], vp->sampbuf[(vp->sampptr + 1) & 3],
G4[-vl], G4[-vl-1],
vp->sampbuf[vp->sampptr], vp->sampbuf[vp->sampptr],
outx); outx);
#endif #endif