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fceugx/source/fceultra/sound.cpp

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update core to FCEUX 2.1.0a
2009-07-17 19:27:04 +02:00
/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2002 Xodnizel
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "types.h"
#include "x6502.h"
#include "fceu.h"
#include "sound.h"
#include "filter.h"
#include "state.h"
#include "wave.h"
static uint32 wlookup1[32];
static uint32 wlookup2[203];
int32 Wave[2048+512];
int32 WaveHi[40000];
int32 WaveFinal[2048+512];
EXPSOUND GameExpSound={0,0,0};
static uint8 TriCount=0;
static uint8 TriMode=0;
static int32 tristep=0;
static int32 wlcount[4]={0,0,0,0}; /* Wave length counters. */
static uint8 IRQFrameMode=0; /* $4017 / xx000000 */
static uint8 PSG[0x10];
static uint8 RawDALatch=0; /* $4011 0xxxxxxx */
uint8 EnabledChannels=0; /* Byte written to $4015 */
typedef struct {
uint8 Speed;
uint8 Mode; /* Fixed volume(1), and loop(2) */
uint8 DecCountTo1;
uint8 decvolume;
int reloaddec;
} ENVUNIT;
static ENVUNIT EnvUnits[3];
static const int RectDuties[4]={1,2,4,6};
static int32 RectDutyCount[2];
static uint8 sweepon[2];
static int32 curfreq[2];
static uint8 SweepCount[2];
static uint16 nreg=0;
static uint8 fcnt=0;
static int32 fhcnt=0;
static int32 fhinc=0;
uint32 soundtsoffs=0;
/* Variables exclusively for low-quality sound. */
int32 nesincsize=0;
uint32 soundtsinc=0;
uint32 soundtsi=0;
static int32 sqacc[2];
/* LQ variables segment ends. */
static int32 lengthcount[4];
static const uint8 lengthtable[0x20]=
{
0x5*2,0x7f*2,0xA*2,0x1*2,0x14*2,0x2*2,0x28*2,0x3*2,0x50*2,0x4*2,0x1E*2,0x5*2,0x7*2,0x6*2,0x0E*2,0x7*2,
0x6*2,0x08*2,0xC*2,0x9*2,0x18*2,0xa*2,0x30*2,0xb*2,0x60*2,0xc*2,0x24*2,0xd*2,0x8*2,0xe*2,0x10*2,0xf*2
};
static const uint32 NoiseFreqTable[0x10]=
{
2,4,8,0x10,0x20,0x30,0x40,0x50,0x65,0x7f,0xbe,0xfe,0x17d,0x1fc,0x3f9,0x7f2
};
static const uint32 NTSCDMCTable[0x10]=
{
428,380,340,320,286,254,226,214,
190,160,142,128,106, 84 ,72,54
};
static const uint32 PALDMCTable[0x10]=
{
397, 353, 315, 297, 265, 235, 209, 198,
176, 148, 131, 118, 98, 78, 66, 50,
};
// $4010 - Frequency
// $4011 - Actual data outputted
// $4012 - Address register: $c000 + V*64
// $4013 - Size register: Size in bytes = (V+1)*64
/*static*/ int32 DMCacc=1;
static int32 DMCPeriod=0;
/*static*/ uint8 DMCBitCount=0;
static uint8 DMCAddressLatch=0,DMCSizeLatch=0; /* writes to 4012 and 4013 */
static uint8 DMCFormat=0; /* Write to $4010 */
static uint32 DMCAddress=0;
static int32 DMCSize=0;
static uint8 DMCShift=0;
static uint8 SIRQStat=0;
static char DMCHaveDMA=0;
static uint8 DMCDMABuf=0;
static char DMCHaveSample=0;
static void Dummyfunc(void) {};
static void (*DoNoise)(void)=Dummyfunc;
static void (*DoTriangle)(void)=Dummyfunc;
static void (*DoPCM)(void)=Dummyfunc;
static void (*DoSQ1)(void)=Dummyfunc;
static void (*DoSQ2)(void)=Dummyfunc;
static uint32 ChannelBC[5];
//savestate sync hack stuff
int movieSyncHackOn=0,resetDMCacc=0,movieConvertOffset1,movieConvertOffset2;
static void LoadDMCPeriod(uint8 V)
{
if(PAL)
DMCPeriod=PALDMCTable[V];
else
DMCPeriod=NTSCDMCTable[V];
}
static void PrepDPCM()
{
DMCAddress=0x4000+(DMCAddressLatch<<6);
DMCSize=(DMCSizeLatch<<4)+1;
}
/* Instantaneous? Maybe the new freq value is being calculated all of the time... */
static int CheckFreq(uint32 cf, uint8 sr)
{
uint32 mod;
if(!(sr&0x8))
{
mod=cf>>(sr&7);
if((mod+cf)&0x800)
return(0);
}
return(1);
}
static void SQReload(int x, uint8 V)
{
if(EnabledChannels&(1<<x))
{
if(x)
DoSQ2();
else
DoSQ1();
lengthcount[x]=lengthtable[(V>>3)&0x1f];
}
sweepon[x]=PSG[(x<<2)|1]&0x80;
curfreq[x]=PSG[(x<<2)|0x2]|((V&7)<<8);
SweepCount[x]=((PSG[(x<<2)|0x1]>>4)&7)+1;
RectDutyCount[x]=7;
EnvUnits[x].reloaddec=1;
//reloadfreq[x]=1;
}
static DECLFW(Write_PSG)
{
A&=0x1F;
switch(A)
{
case 0x0:DoSQ1();
EnvUnits[0].Mode=(V&0x30)>>4;
EnvUnits[0].Speed=(V&0xF);
break;
case 0x1:
sweepon[0]=V&0x80;
break;
case 0x2:
DoSQ1();
curfreq[0]&=0xFF00;
curfreq[0]|=V;
break;
case 0x3:
SQReload(0,V);
break;
case 0x4:
DoSQ2();
EnvUnits[1].Mode=(V&0x30)>>4;
EnvUnits[1].Speed=(V&0xF);
break;
case 0x5:
sweepon[1]=V&0x80;
break;
case 0x6:DoSQ2();
curfreq[1]&=0xFF00;
curfreq[1]|=V;
break;
case 0x7:
SQReload(1,V);
break;
case 0xa:DoTriangle();
break;
case 0xb:
DoTriangle();
if(EnabledChannels&0x4)
lengthcount[2]=lengthtable[(V>>3)&0x1f];
TriMode=1; // Load mode
break;
case 0xC:DoNoise();
EnvUnits[2].Mode=(V&0x30)>>4;
EnvUnits[2].Speed=(V&0xF);
break;
case 0xE:DoNoise();
break;
case 0xF:
DoNoise();
if(EnabledChannels&0x8)
lengthcount[3]=lengthtable[(V>>3)&0x1f];
EnvUnits[2].reloaddec=1;
break;
case 0x10:DoPCM();
LoadDMCPeriod(V&0xF);
if(SIRQStat&0x80)
{
if(!(V&0x80))
{
X6502_IRQEnd(FCEU_IQDPCM);
SIRQStat&=~0x80;
}
else X6502_IRQBegin(FCEU_IQDPCM);
}
break;
}
PSG[A]=V;
}
static DECLFW(Write_DMCRegs)
{
A&=0xF;
switch(A)
{
case 0x00:DoPCM();
LoadDMCPeriod(V&0xF);
if(SIRQStat&0x80)
{
if(!(V&0x80))
{
X6502_IRQEnd(FCEU_IQDPCM);
SIRQStat&=~0x80;
}
else X6502_IRQBegin(FCEU_IQDPCM);
}
DMCFormat=V;
break;
case 0x01:DoPCM();
RawDALatch=V&0x7F;
break;
case 0x02:DMCAddressLatch=V;break;
case 0x03:DMCSizeLatch=V;break;
}
}
static DECLFW(StatusWrite)
{
int x;
DoSQ1();
DoSQ2();
DoTriangle();
DoNoise();
DoPCM();
for(x=0;x<4;x++)
if(!(V&(1<<x))) lengthcount[x]=0; /* Force length counters to 0. */
if(V&0x10)
{
if(!DMCSize)
PrepDPCM();
}
else
{
DMCSize=0;
}
SIRQStat&=~0x80;
X6502_IRQEnd(FCEU_IQDPCM);
EnabledChannels=V&0x1F;
}
static DECLFR(StatusRead)
{
int x;
uint8 ret;
ret=SIRQStat;
for(x=0;x<4;x++) ret|=lengthcount[x]?(1<<x):0;
if(DMCSize) ret|=0x10;
#ifdef FCEUDEF_DEBUGGER
if(!fceuindbg)
#endif
{
SIRQStat&=~0x40;
X6502_IRQEnd(FCEU_IQFCOUNT);
}
return ret;
}
static void FrameSoundStuff(int V)
{
int P;
DoSQ1();
DoSQ2();
DoNoise();
DoTriangle();
if(!(V&1)) /* Envelope decay, linear counter, length counter, freq sweep */
{
if(!(PSG[8]&0x80))
if(lengthcount[2]>0)
lengthcount[2]--;
if(!(PSG[0xC]&0x20)) /* Make sure loop flag is not set. */
if(lengthcount[3]>0)
lengthcount[3]--;
for(P=0;P<2;P++)
{
if(!(PSG[P<<2]&0x20)) /* Make sure loop flag is not set. */
if(lengthcount[P]>0)
lengthcount[P]--;
/* Frequency Sweep Code Here */
/* xxxx 0000 */
/* xxxx = hz. 120/(x+1)*/
if(sweepon[P])
{
int32 mod=0;
if(SweepCount[P]>0) SweepCount[P]--;
if(SweepCount[P]<=0)
{
SweepCount[P]=((PSG[(P<<2)+0x1]>>4)&7)+1; //+1;
if(PSG[(P<<2)+0x1]&0x8)
{
mod-=(P^1)+((curfreq[P])>>(PSG[(P<<2)+0x1]&7));
if(curfreq[P] && (PSG[(P<<2)+0x1]&7)/* && sweepon[P]&0x80*/)
{
curfreq[P]+=mod;
}
}
else
{
mod=curfreq[P]>>(PSG[(P<<2)+0x1]&7);
if((mod+curfreq[P])&0x800)
{
sweepon[P]=0;
curfreq[P]=0;
}
else
{
if(curfreq[P] && (PSG[(P<<2)+0x1]&7)/* && sweepon[P]&0x80*/)
{
curfreq[P]+=mod;
}
}
}
}
}
else /* Sweeping is disabled: */
{
//curfreq[P]&=0xFF00;
//curfreq[P]|=PSG[(P<<2)|0x2]; //|((PSG[(P<<2)|3]&7)<<8);
}
}
}
/* Now do envelope decay + linear counter. */
if(TriMode) // In load mode?
TriCount=PSG[0x8]&0x7F;
else if(TriCount)
TriCount--;
if(!(PSG[0x8]&0x80))
TriMode=0;
for(P=0;P<3;P++)
{
if(EnvUnits[P].reloaddec)
{
EnvUnits[P].decvolume=0xF;
EnvUnits[P].DecCountTo1=EnvUnits[P].Speed+1;
EnvUnits[P].reloaddec=0;
continue;
}
if(EnvUnits[P].DecCountTo1>0) EnvUnits[P].DecCountTo1--;
if(EnvUnits[P].DecCountTo1==0)
{
EnvUnits[P].DecCountTo1=EnvUnits[P].Speed+1;
if(EnvUnits[P].decvolume || (EnvUnits[P].Mode&0x2))
{
EnvUnits[P].decvolume--;
EnvUnits[P].decvolume&=0xF;
}
}
}
}
void FrameSoundUpdate(void)
{
// Linear counter: Bit 0-6 of $4008
// Length counter: Bit 4-7 of $4003, $4007, $400b, $400f
if(!fcnt && !(IRQFrameMode&0x3))
{
SIRQStat|=0x40;
X6502_IRQBegin(FCEU_IQFCOUNT);
}
if(fcnt==3)
{
if(IRQFrameMode&0x2)
fhcnt+=fhinc;
}
FrameSoundStuff(fcnt);
fcnt=(fcnt+1)&3;
}
static INLINE void tester(void)
{
if(DMCBitCount==0)
{
if(!DMCHaveDMA)
DMCHaveSample=0;
else
{
DMCHaveSample=1;
DMCShift=DMCDMABuf;
DMCHaveDMA=0;
}
}
}
static INLINE void DMCDMA(void)
{
if(DMCSize && !DMCHaveDMA)
{
X6502_DMR(0x8000+DMCAddress);
X6502_DMR(0x8000+DMCAddress);
X6502_DMR(0x8000+DMCAddress);
DMCDMABuf=X6502_DMR(0x8000+DMCAddress);
DMCHaveDMA=1;
DMCAddress=(DMCAddress+1)&0x7fff;
DMCSize--;
if(!DMCSize)
{
if(DMCFormat&0x40)
PrepDPCM();
else
{
SIRQStat|=0x80;
if(DMCFormat&0x80)
X6502_IRQBegin(FCEU_IQDPCM);
}
}
}
}
void FCEU_SoundCPUHook(int cycles)
{
fhcnt-=cycles*48;
if(fhcnt<=0)
{
FrameSoundUpdate();
fhcnt+=fhinc;
}
DMCDMA();
DMCacc-=cycles;
while(DMCacc<=0)
{
if(DMCHaveSample)
{
uint8 bah=RawDALatch;
int t=((DMCShift&1)<<2)-2;
/* Unbelievably ugly hack */
if(FSettings.SndRate)
{
soundtsoffs+=DMCacc;
DoPCM();
soundtsoffs-=DMCacc;
}
RawDALatch+=t;
if(RawDALatch&0x80)
RawDALatch=bah;
}
DMCacc+=DMCPeriod;
DMCBitCount=(DMCBitCount+1)&7;
DMCShift>>=1;
tester();
}
}
void RDoPCM(void)
{
uint32 V; //mbg merge 7/17/06 made uint32
for(V=ChannelBC[4];V<SOUNDTS;V++)
WaveHi[V]+=(((RawDALatch<<16)/256) * FSettings.PCMVolume)&(~0xFFFF); // TODO get rid of floating calculations to binary. set log volume scaling.
ChannelBC[4]=SOUNDTS;
}
/* This has the correct phase. Don't mess with it. */
static INLINE void RDoSQ(int x) //Int x decides if this is Square Wave 1 or 2
{
int32 V;
int32 amp, ampx;
int32 rthresh;
int32 *D;
int32 currdc;
int32 cf;
int32 rc;
if(curfreq[x]<8 || curfreq[x]>0x7ff)
goto endit;
if(!CheckFreq(curfreq[x],PSG[(x<<2)|0x1]))
goto endit;
if(!lengthcount[x])
goto endit;
if(EnvUnits[x].Mode&0x1)
amp=EnvUnits[x].Speed;
else
amp=EnvUnits[x].decvolume; //Set the volume of the Square Wave
//Modify Square wave volume based on channel volume modifiers
//adelikat: Note: the formulat x = x * y /100 does not yield exact results, but is "close enough" and avoids the need for using double vales or implicit cohersion which are slower (we need speed here)
ampx = x ? FSettings.Square1Volume : FSettings.Square2Volume; // TODO OPTIMIZE ME!
if (ampx != 256) amp = (amp * ampx) / 256; // CaH4e3: fixed - setting up maximum volume for square2 caused complete mute square2 channel
amp<<=24;
rthresh=RectDuties[(PSG[(x<<2)]&0xC0)>>6];
D=&WaveHi[ChannelBC[x]];
V=SOUNDTS-ChannelBC[x];
currdc=RectDutyCount[x];
cf=(curfreq[x]+1)*2;
rc=wlcount[x];
while(V>0)
{
if(currdc<rthresh)
*D+=amp;
rc--;
if(!rc)
{
rc=cf;
currdc=(currdc+1)&7;
}
V--;
D++;
}
RectDutyCount[x]=currdc;
wlcount[x]=rc;
endit:
ChannelBC[x]=SOUNDTS;
}
static void RDoSQ1(void)
{
RDoSQ(0);
}
static void RDoSQ2(void)
{
RDoSQ(1);
}
static void RDoSQLQ(void)
{
int32 start,end;
int32 V;
int32 amp[2], ampx;
int32 rthresh[2];
int32 freq[2];
int x;
int32 inie[2];
int32 ttable[2][8];
int32 totalout;
start=ChannelBC[0];
end=(SOUNDTS<<16)/soundtsinc;
if(end<=start) return;
ChannelBC[0]=end;
for(x=0;x<2;x++)
{
int y;
inie[x]=nesincsize;
if(curfreq[x]<8 || curfreq[x]>0x7ff)
inie[x]=0;
if(!CheckFreq(curfreq[x],PSG[(x<<2)|0x1]))
inie[x]=0;
if(!lengthcount[x])
inie[x]=0;
if(EnvUnits[x].Mode&0x1)
amp[x]=EnvUnits[x].Speed;
else
amp[x]=EnvUnits[x].decvolume;
//Modify Square wave volume based on channel volume modifiers
//adelikat: Note: the formulat x = x * y /100 does not yield exact results, but is "close enough" and avoids the need for using double vales or implicit cohersion which are slower (we need speed here)
ampx = x ? FSettings.Square1Volume : FSettings.Square2Volume; // TODO OPTIMIZE ME!
if (ampx != 256) amp[x] = (amp[x] * ampx) / 256; // CaH4e3: fixed - setting up maximum volume for square2 caused complete mute square2 channel
if(!inie[x]) amp[x]=0; /* Correct? Buzzing in MM2, others otherwise... */
rthresh[x]=RectDuties[(PSG[x*4]&0xC0)>>6];
for(y=0;y<8;y++)
{
if(y < rthresh[x])
ttable[x][y] = amp[x];
else
ttable[x][y] = 0;
}
freq[x]=(curfreq[x]+1)<<1;
freq[x]<<=17;
}
totalout = wlookup1[ ttable[0][RectDutyCount[0]] + ttable[1][RectDutyCount[1]] ];
if(!inie[0] && !inie[1])
{
for(V=start;V<end;V++)
Wave[V>>4]+=totalout;
}
else
for(V=start;V<end;V++)
{
//int tmpamp=0;
//if(RectDutyCount[0]<rthresh[0])
// tmpamp=amp[0];
//if(RectDutyCount[1]<rthresh[1])
// tmpamp+=amp[1];
//tmpamp=wlookup1[tmpamp];
//tmpamp = wlookup1[ ttable[0][RectDutyCount[0]] + ttable[1][RectDutyCount[1]] ];
Wave[V>>4]+=totalout; //tmpamp;
sqacc[0]-=inie[0];
sqacc[1]-=inie[1];
if(sqacc[0]<=0)
{
rea:
sqacc[0]+=freq[0];
RectDutyCount[0]=(RectDutyCount[0]+1)&7;
if(sqacc[0]<=0) goto rea;
totalout = wlookup1[ ttable[0][RectDutyCount[0]] + ttable[1][RectDutyCount[1]] ];
}
if(sqacc[1]<=0)
{
rea2:
sqacc[1]+=freq[1];
RectDutyCount[1]=(RectDutyCount[1]+1)&7;
if(sqacc[1]<=0) goto rea2;
totalout = wlookup1[ ttable[0][RectDutyCount[0]] + ttable[1][RectDutyCount[1]] ];
}
}
}
static void RDoTriangle(void)
{
uint32 V; //mbg merge 7/17/06 made uitn32
int32 tcout;
tcout=(tristep&0xF);
if(!(tristep&0x10)) tcout^=0xF;
tcout=(tcout*3) << 16; //(tcout<<1);
if(!lengthcount[2] || !TriCount)
{ /* Counter is halted, but we still need to output. */
int32 *start = &WaveHi[ChannelBC[2]];
int32 count = SOUNDTS - ChannelBC[2];
while(count--)
{
//Modify volume based on channel volume modifiers
*start += (tcout/256*FSettings.TriangleVolume)&(~0xFFFF); // TODO OPTIMIZE ME NOW DAMMIT!
start++;
}
//for(V=ChannelBC[2];V<SOUNDTS;V++)
// WaveHi[V]+=tcout;
}
else
for(V=ChannelBC[2];V<SOUNDTS;V++)
{
//Modify volume based on channel volume modifiers
WaveHi[V]+=(tcout/256*FSettings.TriangleVolume)&(~0xFFFF); // TODO OPTIMIZE ME!
wlcount[2]--;
if(!wlcount[2])
{
wlcount[2]=(PSG[0xa]|((PSG[0xb]&7)<<8))+1;
tristep++;
tcout=(tristep&0xF);
if(!(tristep&0x10)) tcout^=0xF;
tcout=(tcout*3) << 16;
}
}
ChannelBC[2]=SOUNDTS;
}
static void RDoTriangleNoisePCMLQ(void)
{
static uint32 tcout=0;
static int32 triacc=0;
static int32 noiseacc=0;
int32 V;
int32 start,end;
int32 freq[2];
int32 inie[2];
uint32 amptab[2];
uint32 noiseout;
int nshift;
int32 totalout;
start=ChannelBC[2];
end=(SOUNDTS<<16)/soundtsinc;
if(end<=start) return;
ChannelBC[2]=end;
inie[0]=inie[1]=nesincsize;
freq[0]=(((PSG[0xa]|((PSG[0xb]&7)<<8))+1));
if(!lengthcount[2] || !TriCount || freq[0]<=4)
inie[0]=0;
freq[0]<<=17;
if(EnvUnits[2].Mode&0x1)
amptab[0]=EnvUnits[2].Speed;
else
amptab[0]=EnvUnits[2].decvolume;
//Modify Square wave volume based on channel volume modifiers
//adelikat: Note: the formulat x = x * y /100 does not yield exact results, but is "close enough" and avoids the need for using double vales or implicit cohersion which are slower (we need speed here)
if (FSettings.TriangleVolume != 256) amptab[0] = (amptab[0] * FSettings.TriangleVolume) / 256; // TODO OPTIMIZE ME!
amptab[1]=0;
amptab[0]<<=1;
if(!lengthcount[3])
amptab[0]=inie[1]=0; /* Quick hack speedup, set inie[1] to 0 */
noiseout=amptab[(nreg>>0xe)&1];
if(PSG[0xE]&0x80)
nshift=8;
else
nshift=13;
totalout = wlookup2[tcout+noiseout+RawDALatch];
if(inie[0] && inie[1])
{
for(V=start;V<end;V++)
{
Wave[V>>4]+=totalout;
triacc-=inie[0];
noiseacc-=inie[1];
if(triacc<=0)
{
rea:
triacc+=freq[0]; //t;
tristep=(tristep+1)&0x1F;
if(triacc<=0) goto rea;
tcout=(tristep&0xF);
if(!(tristep&0x10)) tcout^=0xF;
tcout=tcout*3;
totalout = wlookup2[tcout+noiseout+RawDALatch];
}
if(noiseacc<=0)
{
rea2:
noiseacc+=NoiseFreqTable[PSG[0xE]&0xF]<<(16+2);
nreg=(nreg<<1)+(((nreg>>nshift)^(nreg>>14))&1);
nreg&=0x7fff;
noiseout=amptab[(nreg>>0xe)];
if(noiseacc<=0) goto rea2;
totalout = wlookup2[tcout+noiseout+RawDALatch];
} /* noiseacc<=0 */
} /* for(V=... */
}
else if(inie[0])
{
for(V=start;V<end;V++)
{
Wave[V>>4]+=totalout;
triacc-=inie[0];
if(triacc<=0)
{
area:
triacc+=freq[0]; //t;
tristep=(tristep+1)&0x1F;
if(triacc<=0) goto area;
tcout=(tristep&0xF);
if(!(tristep&0x10)) tcout^=0xF;
tcout=tcout*3;
totalout = wlookup2[tcout+noiseout+RawDALatch];
}
}
}
else if(inie[1])
{
for(V=start;V<end;V++)
{
Wave[V>>4]+=totalout;
noiseacc-=inie[1];
if(noiseacc<=0)
{
area2:
noiseacc+=NoiseFreqTable[PSG[0xE]&0xF]<<(16+2);
nreg=(nreg<<1)+(((nreg>>nshift)^(nreg>>14))&1);
nreg&=0x7fff;
noiseout=amptab[(nreg>>0xe)];
if(noiseacc<=0) goto area2;
totalout = wlookup2[tcout+noiseout+RawDALatch];
} /* noiseacc<=0 */
}
}
else
{
for(V=start;V<end;V++)
Wave[V>>4]+=totalout;
}
}
static void RDoNoise(void)
{
uint32 V; //mbg merge 7/17/06 made uint32
int32 outo;
uint32 amptab[2];
if(EnvUnits[2].Mode&0x1)
amptab[0]=EnvUnits[2].Speed;
else
amptab[0]=EnvUnits[2].decvolume;
//Modfiy Noise channel volume based on channel volume setting
//adelikat: Note: the formulat x = x * y /100 does not yield exact results, but is "close enough" and avoids the need for using double vales or implicit cohersion which are slower (we need speed here)
if (FSettings.NoiseVolume != 256) amptab[0] = (amptab[0] * FSettings.NoiseVolume) / 256; // TODO OPTIMIZE ME!
amptab[0]<<=16;
amptab[1]=0;
amptab[0]<<=1;
outo=amptab[nreg&1]; //(nreg>>0xe)&1];
if(!lengthcount[3])
{
outo=amptab[0]=0;
}
if(PSG[0xE]&0x80) // "short" noise
for(V=ChannelBC[3];V<SOUNDTS;V++)
{
WaveHi[V]+=outo;
wlcount[3]--;
if(!wlcount[3])
{
uint8 feedback;
wlcount[3]=NoiseFreqTable[PSG[0xE]&0xF]<<1;
feedback=((nreg>>8)&1)^((nreg>>14)&1);
nreg=(nreg<<1)+feedback;
nreg&=0x7fff;
outo=amptab[(nreg>>0xe)&1];
}
}
else
for(V=ChannelBC[3];V<SOUNDTS;V++)
{
WaveHi[V]+=outo;
wlcount[3]--;
if(!wlcount[3])
{
uint8 feedback;
wlcount[3]=NoiseFreqTable[PSG[0xE]&0xF]<<1;
feedback=((nreg>>13)&1)^((nreg>>14)&1);
nreg=(nreg<<1)+feedback;
nreg&=0x7fff;
outo=amptab[(nreg>>0xe)&1];
}
}
ChannelBC[3]=SOUNDTS;
}
DECLFW(Write_IRQFM)
{
V=(V&0xC0)>>6;
fcnt=0;
if(V&0x2)
FrameSoundUpdate();
fcnt=1;
fhcnt=fhinc;
X6502_IRQEnd(FCEU_IQFCOUNT);
SIRQStat&=~0x40;
IRQFrameMode=V;
}
void SetNESSoundMap(void)
{
SetWriteHandler(0x4000,0x400F,Write_PSG);
SetWriteHandler(0x4010,0x4013,Write_DMCRegs);
SetWriteHandler(0x4017,0x4017,Write_IRQFM);
SetWriteHandler(0x4015,0x4015,StatusWrite);
SetReadHandler(0x4015,0x4015,StatusRead);
}
static int32 inbuf=0;
int FlushEmulateSound(void)
{
int x;
int32 end,left;
if(!timestamp) return(0);
if(!FSettings.SndRate)
{
left=0;
end=0;
goto nosoundo;
}
DoSQ1();
DoSQ2();
DoTriangle();
DoNoise();
DoPCM();
if(FSettings.soundq>=1)
{
int32 *tmpo=&WaveHi[soundtsoffs];
if(GameExpSound.HiFill) GameExpSound.HiFill();
for(x=timestamp;x;x--)
{
uint32 b=*tmpo;
*tmpo=(b&65535)+wlookup2[(b>>16)&255]+wlookup1[b>>24];
tmpo++;
}
end=NeoFilterSound(WaveHi,WaveFinal,SOUNDTS,&left);
memmove(WaveHi,WaveHi+SOUNDTS-left,left*sizeof(uint32));
memset(WaveHi+left,0,sizeof(WaveHi)-left*sizeof(uint32));
if(GameExpSound.HiSync) GameExpSound.HiSync(left);
for(x=0;x<5;x++)
ChannelBC[x]=left;
}
else
{
end=(SOUNDTS<<16)/soundtsinc;
if(GameExpSound.Fill)
GameExpSound.Fill(end&0xF);
SexyFilter(Wave,WaveFinal,end>>4);
//if(FSettings.lowpass)
// SexyFilter2(WaveFinal,end>>4);
if(end&0xF)
Wave[0]=Wave[(end>>4)];
Wave[end>>4]=0;
}
nosoundo:
if(FSettings.soundq>=1)
{
soundtsoffs=left;
}
else
{
for(x=0;x<5;x++)
ChannelBC[x]=end&0xF;
soundtsoffs = (soundtsinc*(end&0xF))>>16;
end>>=4;
}
inbuf=end;
FCEU_WriteWaveData(WaveFinal, end); /* This function will just return
if sound recording is off. */
return(end);
}
int GetSoundBuffer(int32 **W)
{
*W=WaveFinal;
return(inbuf);
}
/* FIXME: Find out what sound registers get reset on reset. I know $4001/$4005 don't,
due to that whole MegaMan 2 Game Genie thing.
*/
void FCEUSND_Reset(void)
{
int x;
IRQFrameMode=0x0;
fhcnt=fhinc;
fcnt=0;
nreg=1;
for(x=0;x<2;x++)
{
wlcount[x]=2048;
if(nesincsize) // lq mode
sqacc[x]=((uint32)2048<<17)/nesincsize;
else
sqacc[x]=1;
sweepon[x]=0;
curfreq[x]=0;
}
wlcount[2]=1; //2048;
wlcount[3]=2048;
DMCHaveDMA=DMCHaveSample=0;
SIRQStat=0x00;
RawDALatch=0x00;
TriCount=0;
TriMode=0;
tristep=0;
EnabledChannels=0;
for(x=0;x<4;x++)
lengthcount[x]=0;
DMCAddressLatch=0;
DMCSizeLatch=0;
DMCFormat=0;
DMCAddress=0;
DMCSize=0;
DMCShift=0;
// MAJOR BUG WAS HERE: DMCacc and DMCBitCount never got reset...
// so, do some ridiculous hackery if a movie's about to play to keep it in sync...
if(movieSyncHackOn)
{
if(resetDMCacc)
{
// no value in movie save state
#ifdef WIN32
// use editbox fields
DMCacc=movieConvertOffset1;
DMCBitCount=movieConvertOffset2;
#else
// no editbox fields, so leave the values alone
// and print out a warning that says what they are
FCEU_PrintError("Warning: These variables were not found in the save state and will keep their current value: DMCacc=%d, DMCBitCount=%d\n", DMCacc, DMCBitCount);
#endif
}
else
{
// keep values loaded from movie save state or reset earlier
}
}
else
{
// reset these variables like should have done in the first place
DMCacc=1;
DMCBitCount=0;
}
// FCEU_PrintError("DMCacc=%d, DMCBitCount=%d",DMCacc,DMCBitCount);
}
void FCEUSND_Power(void)
{
int x;
SetNESSoundMap();
memset(PSG,0x00,sizeof(PSG));
FCEUSND_Reset();
memset(Wave,0,sizeof(Wave));
memset(WaveHi,0,sizeof(WaveHi));
memset(&EnvUnits,0,sizeof(EnvUnits));
for(x=0;x<5;x++)
ChannelBC[x]=0;
soundtsoffs=0;
LoadDMCPeriod(DMCFormat&0xF);
}
void SetSoundVariables(void)
{
int x;
fhinc=PAL?16626:14915; // *2 CPU clock rate
fhinc*=24;
if(FSettings.SndRate)
{
wlookup1[0]=0;
for(x=1;x<32;x++)
{
wlookup1[x]=(double)16*16*16*4*95.52/((double)8128/(double)x+100);
if(!FSettings.soundq) wlookup1[x]>>=4;
}
wlookup2[0]=0;
for(x=1;x<203;x++)
{
wlookup2[x]=(double)16*16*16*4*163.67/((double)24329/(double)x+100);
if(!FSettings.soundq) wlookup2[x]>>=4;
}
if(FSettings.soundq>=1)
{
DoNoise=RDoNoise;
DoTriangle=RDoTriangle;
DoPCM=RDoPCM;
DoSQ1=RDoSQ1;
DoSQ2=RDoSQ2;
}
else
{
DoNoise=DoTriangle=DoPCM=DoSQ1=DoSQ2=Dummyfunc;
DoSQ1=RDoSQLQ;
DoSQ2=RDoSQLQ;
DoTriangle=RDoTriangleNoisePCMLQ;
DoNoise=RDoTriangleNoisePCMLQ;
DoPCM=RDoTriangleNoisePCMLQ;
}
}
else
{
DoNoise=DoTriangle=DoPCM=DoSQ1=DoSQ2=Dummyfunc;
return;
}
MakeFilters(FSettings.SndRate);
if(GameExpSound.RChange)
GameExpSound.RChange();
nesincsize=(int64)(((int64)1<<17)*(double)(PAL?PAL_CPU:NTSC_CPU)/(FSettings.SndRate * 16));
memset(sqacc,0,sizeof(sqacc));
memset(ChannelBC,0,sizeof(ChannelBC));
LoadDMCPeriod(DMCFormat&0xF); // For changing from PAL to NTSC
soundtsinc=(uint32)((uint64)(PAL?(long double)PAL_CPU*65536:(long double)NTSC_CPU*65536)/(FSettings.SndRate * 16));
}
void FCEUI_Sound(int Rate)
{
FSettings.SndRate=Rate;
SetSoundVariables();
}
void FCEUI_SetLowPass(int q)
{
FSettings.lowpass=q;
}
void FCEUI_SetSoundQuality(int quality)
{
FSettings.soundq=quality;
SetSoundVariables();
}
void FCEUI_SetSoundVolume(uint32 volume)
{
FSettings.SoundVolume=volume;
}
void FCEUI_SetTriangleVolume(uint32 volume)
{
FSettings.TriangleVolume=volume;
}
void FCEUI_SetSquare1Volume(uint32 volume)
{
FSettings.Square1Volume=volume;
}
void FCEUI_SetSquare2Volume(uint32 volume)
{
FSettings.Square2Volume=volume;
}
void FCEUI_SetNoiseVolume(uint32 volume)
{
FSettings.NoiseVolume=volume;
}
void FCEUI_SetPCMVolume(uint32 volume)
{
FSettings.PCMVolume=volume;
}
SFORMAT FCEUSND_STATEINFO[]={
{ &fhcnt, 4|FCEUSTATE_RLSB,"FHCN"},
{ &fcnt, 1, "FCNT"},
{ PSG, 0x10, "PSG"},
{ &EnabledChannels, 1, "ENCH"},
{ &IRQFrameMode, 1, "IQFM"},
{ &nreg, 2|FCEUSTATE_RLSB, "NREG"},
{ &TriMode, 1, "TRIM"},
{ &TriCount, 1, "TRIC"},
{ &EnvUnits[0].Speed, 1, "E0SP"},
{ &EnvUnits[1].Speed, 1, "E1SP"},
{ &EnvUnits[2].Speed, 1, "E2SP"},
{ &EnvUnits[0].Mode, 1, "E0MO"},
{ &EnvUnits[1].Mode, 1, "E1MO"},
{ &EnvUnits[2].Mode, 1, "E2MO"},
{ &EnvUnits[0].DecCountTo1, 1, "E0D1"},
{ &EnvUnits[1].DecCountTo1, 1, "E1D1"},
{ &EnvUnits[2].DecCountTo1, 1, "E2D1"},
{ &EnvUnits[0].decvolume, 1, "E0DV"},
{ &EnvUnits[1].decvolume, 1, "E1DV"},
{ &EnvUnits[2].decvolume, 1, "E2DV"},
{ &lengthcount[0], 4|FCEUSTATE_RLSB, "LEN0"},
{ &lengthcount[1], 4|FCEUSTATE_RLSB, "LEN1"},
{ &lengthcount[2], 4|FCEUSTATE_RLSB, "LEN2"},
{ &lengthcount[3], 4|FCEUSTATE_RLSB, "LEN3"},
{ sweepon, 2, "SWEE"},
{ &curfreq[0], 4|FCEUSTATE_RLSB,"CRF1"},
{ &curfreq[1], 4|FCEUSTATE_RLSB,"CRF2"},
{ SweepCount, 2,"SWCT"},
{ &SIRQStat, 1, "SIRQ"},
{ &DMCacc, 4|FCEUSTATE_RLSB, "5ACC"},
{ &DMCBitCount, 1, "5BIT"},
{ &DMCAddress, 4|FCEUSTATE_RLSB, "5ADD"},
{ &DMCSize, 4|FCEUSTATE_RLSB, "5SIZ"},
{ &DMCShift, 1, "5SHF"},
{ &DMCHaveDMA, 1, "5HVDM"},
{ &DMCHaveSample, 1, "5HVSP"},
{ &DMCSizeLatch, 1, "5SZL"},
{ &DMCAddressLatch, 1, "5ADL"},
{ &DMCFormat, 1, "5FMT"},
{ &RawDALatch, 1, "RWDA"},
{ 0 }
};
void FCEUSND_SaveState(void)
{
}
void FCEUSND_LoadState(int version)
{
LoadDMCPeriod(DMCFormat&0xF);
RawDALatch&=0x7F;
DMCAddress&=0x7FFF;
}
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