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WonderSwan: acquireDirect()

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This commit is contained in:
tildearrow 2025-03-07 18:37:25 -05:00
parent 3d915270b1
commit 0d7ef2e8eb
7 changed files with 90 additions and 156 deletions
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80
src/engine/platform/swan.cpp
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@ -53,16 +53,36 @@ const char** DivPlatformSwan::getRegisterSheet() {
return regCheatSheetWS;
}
void DivPlatformSwan::acquire(short** buf, size_t len) {
void DivPlatformSwan::acquireDirect(blip_buffer_t** bb, size_t len) {
for (int i=0; i<4; i++) {
oscBuf[i]->begin(len);
ws->oscBuf[i]=oscBuf[i];
}
ws->sbuf[0]=bb[0];
ws->sbuf[1]=bb[1];
for (size_t h=0; h<len; h++) {
ws->v30mz_timestamp=h;
// heuristic
int pcmAdvance=1;
if (writes.empty()) {
if (!pcm || dacSample==-1) {
break;
} else {
pcmAdvance=len-h;
if (dacRate>0) {
int remainTime=(rate-dacPeriod+dacRate-1)/dacRate;
if (remainTime<pcmAdvance) pcmAdvance=remainTime;
if (remainTime<1) pcmAdvance=1;
}
}
}
// PCM part
if (pcm && dacSample!=-1) {
dacPeriod+=dacRate;
while (dacPeriod>rate) {
dacPeriod+=dacRate*pcmAdvance;
while (dacPeriod>=rate) {
DivSample* s=parent->getSample(dacSample);
if (s->samples<=0 || dacPos>=s->samples) {
dacSample=-1;
@ -78,25 +98,27 @@ void DivPlatformSwan::acquire(short** buf, size_t len) {
dacPeriod-=rate;
}
}
h+=pcmAdvance-1;
// the rest
while (!writes.empty()) {
QueuedWrite w=writes.front();
regPool[w.addr]=w.val;
if (w.addr<0x40) ws->SoundWrite(w.addr|0x80,w.val);
else ws->RAMWrite(w.addr&0x3f,w.val);
if (w.addr<0x40) {
ws->SoundWrite(w.addr|0x80,w.val);
} else {
ws->SoundCheckRAMWrite(w.addr&0x3f);
ws->RAMWrite(w.addr&0x3f,w.val);
}
writes.pop();
}
int16_t samp[2]{0, 0};
ws->SoundUpdate(coreQuality);
ws->SoundFlush(samp,1);
buf[0][h]=samp[0];
buf[1][h]=samp[1];
for (int i=0; i<4; i++) {
oscBuf[i]->putSample(h,(ws->sample_cache[i][0]+ws->sample_cache[i][1])<<6);
}
}
ws->v30mz_timestamp=len;
ws->SoundUpdate();
ws->SoundFlush(NULL,0);
for (int i=0; i<4; i++) {
oscBuf[i]->end(len);
}
@ -587,6 +609,10 @@ int DivPlatformSwan::getOutputCount() {
return 2;
}
bool DivPlatformSwan::hasAcquireDirect() {
return true;
}
void DivPlatformSwan::notifyWaveChange(int wave) {
for (int i=0; i<4; i++) {
if (chan[i].wave==wave) {
@ -613,38 +639,12 @@ void DivPlatformSwan::poke(std::vector<DivRegWrite>& wlist) {
void DivPlatformSwan::setFlags(const DivConfig& flags) {
chipClock=3072000;
CHECK_CUSTOM_CLOCK;
rate=chipClock/coreQuality;
rate=chipClock;
for (int i=0; i<4; i++) {
oscBuf[i]->setRate(rate);
}
}
void DivPlatformSwan::setCoreQuality(unsigned char q) {
switch (q) {
case 0:
coreQuality=96;
break;
case 1:
coreQuality=64;
break;
case 2:
coreQuality=32;
break;
case 3:
coreQuality=16;
break;
case 4:
coreQuality=4;
break;
case 5:
coreQuality=1;
break;
default:
coreQuality=16;
break;
}
}
int DivPlatformSwan::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
parent=p;
dumpWrites=false;