// /
//
-
-INLINE void InterpolateUp(int ch)
+static void InterpolateUp(int *SB, int sinc)
{
- if(s_chan[ch].SB[32]==1) // flag == 1? calc step and set flag... and don't change the value in this pass
+ if(SB[32]==1) // flag == 1? calc step and set flag... and don't change the value in this pass
{
- const int id1=s_chan[ch].SB[30]-s_chan[ch].SB[29]; // curr delta to next val
- const int id2=s_chan[ch].SB[31]-s_chan[ch].SB[30]; // and next delta to next-next val :)
+ const int id1=SB[30]-SB[29]; // curr delta to next val
+ const int id2=SB[31]-SB[30]; // and next delta to next-next val :)
- s_chan[ch].SB[32]=0;
+ SB[32]=0;
if(id1>0) // curr delta positive
{
if(id2<id1)
- {s_chan[ch].SB[28]=id1;s_chan[ch].SB[32]=2;}
+ {SB[28]=id1;SB[32]=2;}
else
if(id2<(id1<<1))
- s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x10000L;
+ SB[28]=(id1*sinc)>>16;
else
- s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x20000L;
+ SB[28]=(id1*sinc)>>17;
}
else // curr delta negative
{
if(id2>id1)
- {s_chan[ch].SB[28]=id1;s_chan[ch].SB[32]=2;}
+ {SB[28]=id1;SB[32]=2;}
else
if(id2>(id1<<1))
- s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x10000L;
+ SB[28]=(id1*sinc)>>16;
else
- s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x20000L;
+ SB[28]=(id1*sinc)>>17;
}
}
else
- if(s_chan[ch].SB[32]==2) // flag 1: calc step and set flag... and don't change the value in this pass
+ if(SB[32]==2) // flag 1: calc step and set flag... and don't change the value in this pass
{
- s_chan[ch].SB[32]=0;
+ SB[32]=0;
- s_chan[ch].SB[28]=(s_chan[ch].SB[28]*s_chan[ch].sinc)/0x20000L;
- //if(s_chan[ch].sinc<=0x8000)
- // s_chan[ch].SB[29]=s_chan[ch].SB[30]-(s_chan[ch].SB[28]*((0x10000/s_chan[ch].sinc)-1));
+ SB[28]=(SB[28]*sinc)>>17;
+ //if(sinc<=0x8000)
+ // SB[29]=SB[30]-(SB[28]*((0x10000/sinc)-1));
//else
- s_chan[ch].SB[29]+=s_chan[ch].SB[28];
+ SB[29]+=SB[28];
}
else // no flags? add bigger val (if possible), calc smaller step, set flag1
- s_chan[ch].SB[29]+=s_chan[ch].SB[28];
+ SB[29]+=SB[28];
}
//
// even easier interpolation on downsampling, also no special filter, again just "Pete's common sense" tm
//
-INLINE void InterpolateDown(int ch)
+static void InterpolateDown(int *SB, int sinc)
{
- if(s_chan[ch].sinc>=0x20000L) // we would skip at least one val?
+ if(sinc>=0x20000L) // we would skip at least one val?
{
- s_chan[ch].SB[29]+=(s_chan[ch].SB[30]-s_chan[ch].SB[29])/2; // add easy weight
- if(s_chan[ch].sinc>=0x30000L) // we would skip even more vals?
- s_chan[ch].SB[29]+=(s_chan[ch].SB[31]-s_chan[ch].SB[30])/2;// add additional next weight
+ SB[29]+=(SB[30]-SB[29])/2; // add easy weight
+ if(sinc>=0x30000L) // we would skip even more vals?
+ SB[29]+=(SB[31]-SB[30])/2; // add additional next weight
}
}
////////////////////////////////////////////////////////////////////////
// helpers for gauss interpolation
-#define gval0 (((short*)(&s_chan[ch].SB[29]))[gpos&3])
-#define gval(x) ((int)((short*)(&s_chan[ch].SB[29]))[(gpos+x)&3])
+#define gval0 (((short*)(&SB[29]))[gpos&3])
+#define gval(x) ((int)((short*)(&SB[29]))[(gpos+x)&3])
#include "gauss_i.h"
// ALL KIND OF HELPERS
////////////////////////////////////////////////////////////////////////
-INLINE int FModChangeFrequency(int ch,int ns)
+INLINE int FModChangeFrequency(int *SB, int pitch, int ns)
{
- unsigned int NP=s_chan[ch].iRawPitch;
+ unsigned int NP=pitch;
int sinc;
- NP=((32768L+iFMod[ns])*NP)/32768L;
+ NP=((32768L+iFMod[ns])*NP)>>15;
if(NP>0x3fff) NP=0x3fff;
if(NP<0x1) NP=0x1;
sinc=NP<<4; // calc frequency
if(spu_config.iUseInterpolation==1) // freq change in simple interpolation mode
- s_chan[ch].SB[32]=1;
+ SB[32]=1;
iFMod[ns]=0;
return sinc;
////////////////////////////////////////////////////////////////////////
-INLINE void StoreInterpolationVal(int ch,int fa)
+INLINE void StoreInterpolationVal(int *SB, int sinc, int fa, int fmod_freq)
{
- if(s_chan[ch].bFMod==2) // fmod freq channel
- s_chan[ch].SB[29]=fa;
+ if(fmod_freq) // fmod freq channel
+ SB[29]=fa;
else
{
ssat32_to_16(fa);
if(spu_config.iUseInterpolation>=2) // gauss/cubic interpolation
- {
- int gpos = s_chan[ch].SB[28];
- gval0 = fa;
+ {
+ int gpos = SB[28];
+ gval0 = fa;
gpos = (gpos+1) & 3;
- s_chan[ch].SB[28] = gpos;
+ SB[28] = gpos;
}
else
if(spu_config.iUseInterpolation==1) // simple interpolation
{
- s_chan[ch].SB[28] = 0;
- s_chan[ch].SB[29] = s_chan[ch].SB[30]; // -> helpers for simple linear interpolation: delay real val for two slots, and calc the two deltas, for a 'look at the future behaviour'
- s_chan[ch].SB[30] = s_chan[ch].SB[31];
- s_chan[ch].SB[31] = fa;
- s_chan[ch].SB[32] = 1; // -> flag: calc new interolation
+ SB[28] = 0;
+ SB[29] = SB[30]; // -> helpers for simple linear interpolation: delay real val for two slots, and calc the two deltas, for a 'look at the future behaviour'
+ SB[30] = SB[31];
+ SB[31] = fa;
+ SB[32] = 1; // -> flag: calc new interolation
}
- else s_chan[ch].SB[29]=fa; // no interpolation
+ else SB[29]=fa; // no interpolation
}
}
////////////////////////////////////////////////////////////////////////
-INLINE int iGetInterpolationVal(int ch, int spos)
+INLINE int iGetInterpolationVal(int *SB, int sinc, int spos, int fmod_freq)
{
int fa;
- if(s_chan[ch].bFMod==2) return s_chan[ch].SB[29];
+ if(fmod_freq) return SB[29];
switch(spu_config.iUseInterpolation)
- {
+ {
//--------------------------------------------------//
case 3: // cubic interpolation
{
long xd;int gpos;
xd = (spos >> 1)+1;
- gpos = s_chan[ch].SB[28];
+ gpos = SB[28];
fa = gval(3) - 3*gval(2) + 3*gval(1) - gval0;
fa *= (xd - (2<<15)) / 6;
{
int vl, vr;int gpos;
vl = (spos >> 6) & ~3;
- gpos = s_chan[ch].SB[28];
+ gpos = SB[28];
vr=(gauss[vl]*(int)gval0)&~2047;
vr+=(gauss[vl+1]*gval(1))&~2047;
vr+=(gauss[vl+2]*gval(2))&~2047;
//--------------------------------------------------//
case 1: // simple interpolation
{
- if(s_chan[ch].sinc<0x10000L) // -> upsampling?
- InterpolateUp(ch); // --> interpolate up
- else InterpolateDown(ch); // --> else down
- fa=s_chan[ch].SB[29];
+ if(sinc<0x10000L) // -> upsampling?
+ InterpolateUp(SB, sinc); // --> interpolate up
+ else InterpolateDown(SB, sinc); // --> else down
+ fa=SB[29];
} break;
//--------------------------------------------------//
default: // no interpolation
{
- fa=s_chan[ch].SB[29];
+ fa=SB[29];
} break;
//--------------------------------------------------//
}
}
}
-static int decode_block(int ch)
+static int decode_block(int ch, int *SB)
{
unsigned char *start;
int predict_nr, shift_factor, flags;
shift_factor = predict_nr & 0xf;
predict_nr >>= 4;
- decode_block_data(s_chan[ch].SB, start + 2, predict_nr, shift_factor);
+ decode_block_data(SB, start + 2, predict_nr, shift_factor);
flags = start[1];
if (flags & 4)
if (sbpos >= 28) \
{ \
sbpos = 0; \
- d = decode_block(ch); \
+ d = decode_block(ch, SB); \
if (d && ns < ret) \
ret = ns; \
} \
#define fmod_recv_check \
if(s_chan[ch].bFMod==1 && iFMod[ns]) \
- sinc = FModChangeFrequency(ch,ns)
+ sinc = FModChangeFrequency(SB, s_chan[ch].iRawPitch, ns)
make_do_samples(default, fmod_recv_check, ,
- StoreInterpolationVal(ch, fa),
- ChanBuf[ns] = iGetInterpolationVal(ch, spos), )
-make_do_samples(noint, , fa = s_chan[ch].SB[29], , ChanBuf[ns] = fa, s_chan[ch].SB[29] = fa)
+ StoreInterpolationVal(SB, sinc, fa, s_chan[ch].bFMod==2),
+ ChanBuf[ns] = iGetInterpolationVal(SB, sinc, spos, s_chan[ch].bFMod==2), )
+make_do_samples(noint, , fa = SB[29], , ChanBuf[ns] = fa, SB[29] = fa)
#define simple_interp_store \
SB[28] = 0; \
SB[32] = 1
#define simple_interp_get \
- if(sinc<0x10000) /* -> upsampling? */ \
- InterpolateUp(ch); /* --> interpolate up */ \
- else InterpolateDown(ch); /* --> else down */ \
- ChanBuf[ns] = s_chan[ch].SB[29]
+ if(sinc<0x10000) /* -> upsampling? */ \
+ InterpolateUp(SB, sinc); /* --> interpolate up */ \
+ else InterpolateDown(SB, sinc); /* --> else down */ \
+ ChanBuf[ns] = SB[29]
make_do_samples(simple, , ,
simple_interp_store, simple_interp_get, )
notaz.gp2x.de / pcsx_rearmed.git / blobdiff