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PCE: Mednafen is wonderful

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the PSG emulator already comes with heuristics... I stripped them off
for Furnace but now that we have acquireDirect() we can give it our
blip_buf and handle everything there

from 40-70% to 10% CPU usage on my phone, and highest quality!

TODO:
- PCM
- chan osc (should be very easy)
This commit is contained in:
tildearrow 2025-03-03 20:27:35 -05:00
parent f5589d0084
commit f0a3e3f590
4 changed files with 37 additions and 57 deletions
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52
src/engine/platform/pce.cpp
View file

@ -34,7 +34,7 @@
rWrite(a,v); \
}
#define CHIP_DIVIDER 32
#define CHIP_DIVIDER 64
const char* regCheatSheetPCE[]={
"Select", "0",
@ -55,12 +55,20 @@ const char** DivPlatformPCE::getRegisterSheet() {
}
void DivPlatformPCE::acquire(short** buf, size_t len) {
}
void DivPlatformPCE::acquireDirect(blip_buffer_t** bb, size_t off, size_t len) {
for (int i=0; i<6; i++) {
oscBuf[i]->begin(len);
}
pce->bb[0]=bb[0];
pce->bb[1]=bb[1];
size_t pos=off;
for (size_t h=0; h<len; h++) {
// PCM part
/*
for (int i=0; i<6; i++) {
if (chan[i].pcm && chan[i].dacSample!=-1) {
chan[i].dacPeriod+=chan[i].dacRate;
@ -89,35 +97,25 @@ void DivPlatformPCE::acquire(short** buf, size_t len) {
chan[i].dacPeriod-=rate;
}
}
}
}*/
// PCE part
// WHAT?????????
pce->ResetTS(pos);
while (!writes.empty()) {
QueuedWrite w=writes.front();
pce->Write(0,w.addr,w.val);
pce->Write(pos,w.addr,w.val);
regPool[w.addr&0x0f]=w.val;
writes.pop();
}
tempL[0]=0;
tempR[0]=0;
pce->Update(coreQuality);
pce->ResetTS(0);
pce->Update(len+pos);
break;
/*
for (int i=0; i<6; i++) {
oscBuf[i]->putSample(h,CLAMP(pce->channel[i].blip_prev_samp[0]+pce->channel[i].blip_prev_samp[1],-32768,32767));
}
tempL[0]=(tempL[0]>>1)+(tempL[0]>>2);
tempR[0]=(tempR[0]>>1)+(tempR[0]>>2);
if (tempL[0]<-32768) tempL[0]=-32768;
if (tempL[0]>32767) tempL[0]=32767;
if (tempR[0]<-32768) tempR[0]=-32768;
if (tempR[0]>32767) tempR[0]=32767;
//printf("tempL: %d tempR: %d\n",tempL,tempR);
buf[0][h]=tempL[0];
buf[1][h]=tempR[0];
}*/
pos++;
}
for (int i=0; i<6; i++) {
@ -614,8 +612,6 @@ void DivPlatformPCE::reset() {
}
pce->Power(0);
lastPan=0xff;
memset(tempL,0,32*sizeof(int));
memset(tempR,0,32*sizeof(int));
curChan=-1;
sampleBank=0;
lfoMode=0;
@ -639,6 +635,10 @@ bool DivPlatformPCE::keyOffAffectsArp(int ch) {
return true;
}
bool DivPlatformPCE::hasAcquireDirect() {
return true;
}
void DivPlatformPCE::notifyWaveChange(int wave) {
for (int i=0; i<6; i++) {
if (chan[i].wave==wave) {
@ -656,13 +656,13 @@ void DivPlatformPCE::notifyInsDeletion(void* ins) {
void DivPlatformPCE::setFlags(const DivConfig& flags) {
if (flags.getInt("clockSel",0)) { // technically there is no PAL PC Engine but oh well...
chipClock=COLOR_PAL*4.0/5.0;
chipClock=COLOR_PAL*8.0/5.0;
} else {
chipClock=COLOR_NTSC;
chipClock=COLOR_NTSC*2.0;
}
CHECK_CUSTOM_CLOCK;
antiClickEnabled=!flags.getBool("noAntiClick",false);
rate=chipClock/(coreQuality>>1);
rate=chipClock;
for (int i=0; i<6; i++) {
oscBuf[i]->setRate(rate);
}
@ -671,7 +671,7 @@ void DivPlatformPCE::setFlags(const DivConfig& flags) {
delete pce;
pce=NULL;
}
pce=new PCE_PSG(tempL,tempR,flags.getInt("chipType",0)?PCE_PSG::REVISION_HUC6280A:PCE_PSG::REVISION_HUC6280);
pce=new PCE_PSG(flags.getInt("chipType",0)?PCE_PSG::REVISION_HUC6280A:PCE_PSG::REVISION_HUC6280);
}
void DivPlatformPCE::poke(unsigned int addr, unsigned short val) {