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SM8521: acquireDirect()

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This commit is contained in:
tildearrow 2025-03-09 03:58:09 -05:00
parent 1c05bb8b05
commit d1234ad59e
3 changed files with 33 additions and 38 deletions
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60
src/engine/platform/sm8521.cpp
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@ -47,7 +47,7 @@ const char** DivPlatformSM8521::getRegisterSheet() {
return regCheatSheetSM8521;
}
void DivPlatformSM8521::acquire(short** buf, size_t len) {
void DivPlatformSM8521::acquireDirect(blip_buffer_t** bb, size_t len) {
while (!writes.empty()) {
QueuedWrite w=writes.front();
sm8521_write(&sm8521,w.addr,w.val);
@ -60,8 +60,29 @@ void DivPlatformSM8521::acquire(short** buf, size_t len) {
}
for (size_t h=0; h<len; h++) {
sm8521_sound_tick(&sm8521,coreQuality);
buf[0][h]=sm8521.out<<6;
int advance=len-h;
if (sm8521.sgc&1) {
const int remain=(sm8521.sg[0].base.t+1)-sm8521.sg[0].base.counter;
if (remain<advance) advance=remain;
}
if (sm8521.sgc&2) {
const int remain=(sm8521.sg[1].base.t+1)-sm8521.sg[1].base.counter;
if (remain<advance) advance=remain;
}
if (sm8521.sgc&4) {
const int remain=(sm8521.noise.base.t+1)-sm8521.noise.base.counter;
if (remain<advance) advance=remain;
}
if (advance<1) advance=1;
sm8521_sound_tick(&sm8521,advance);
h+=advance-1;
int out=sm8521.out<<6;
if (out!=lastOut) {
blip_add_delta(bb[0],h,out-lastOut);
lastOut=out;
}
for (int i=0; i<2; i++) {
oscBuf[i]->putSample(h,sm8521.sg[i].base.out<<7);
}
@ -346,6 +367,7 @@ void DivPlatformSM8521::reset() {
addWrite(0xffffffff,0);
}
sm8521_reset(&sm8521);
lastOut=0;
rWrite(0x40,0x80); // initialize SGC
}
@ -357,6 +379,10 @@ bool DivPlatformSM8521::keyOffAffectsArp(int ch) {
return true;
}
bool DivPlatformSM8521::hasAcquireDirect() {
return true;
}
void DivPlatformSM8521::notifyWaveChange(int wave) {
for (int i=0; i<2; i++) {
if (chan[i].wave==wave) {
@ -376,7 +402,7 @@ void DivPlatformSM8521::setFlags(const DivConfig& flags) {
chipClock=11059200;
CHECK_CUSTOM_CLOCK;
antiClickEnabled=!flags.getBool("noAntiClick",false);
rate=chipClock/4/coreQuality; // CKIN -> fCLK(/2) -> Function blocks (/2)
rate=chipClock/4; // CKIN -> fCLK(/2) -> Function blocks (/2)
for (int i=0; i<3; i++) {
oscBuf[i]->setRate(rate);
}
@ -390,32 +416,6 @@ void DivPlatformSM8521::poke(std::vector<DivRegWrite>& wlist) {
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}
void DivPlatformSM8521::setCoreQuality(unsigned char q) {
switch (q) {
case 0:
coreQuality=64;
break;
case 1:
coreQuality=32;
break;
case 2:
coreQuality=16;
break;
case 3:
coreQuality=8;
break;
case 4:
coreQuality=4;
break;
case 5:
coreQuality=1;
break;
default:
coreQuality=8;
break;
}
}
int DivPlatformSM8521::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
parent=p;
dumpWrites=false;