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more playback work

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This commit is contained in:
tildearrow 2021-05-14 03:23:40 -05:00
parent 5b002ca1d5
commit 775b88dae2
7 changed files with 145 additions and 39 deletions
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40
src/engine/platform/genesis.cpp
View file

@ -1,6 +1,7 @@
#include "genesis.h"
#include "../engine.h"
#include <string.h>
#include <math.h>
// TODO fix all the writes.
// i think there is no wait for data writes, just for ON/OFF writes
@ -50,9 +51,6 @@ static unsigned short opOffs[4]={
static unsigned char konOffs[6]={
0, 1, 2, 4, 5, 6
};
static unsigned short notes[12]={
644,681,722,765,810,858,910,964,1021,1081,1146,1214
};
static bool isOutput[8][4]={
// 1 3 2 4
{false,false,false,true},
@ -87,9 +85,36 @@ void DivPlatformGenesis::tick() {
}
for (int i=0; i<6; i++) {
if (chan[i].keyOn) {
if (chan[i].freqChanged) {
if (chan[i].freq>=131072) {
chan[i].freqH=((chan[i].freq>>15)&7)|0x38;
chan[i].freqL=(chan[i].freq>>7)&0xff;
} else if (chan[i].freq>=65536) {
chan[i].freqH=((chan[i].freq>>14)&7)|0x30;
chan[i].freqL=(chan[i].freq>>6)&0xff;
} else if (chan[i].freq>=32768) {
chan[i].freqH=((chan[i].freq>>13)&7)|0x28;
chan[i].freqL=(chan[i].freq>>5)&0xff;
} else if (chan[i].freq>=16384) {
chan[i].freqH=((chan[i].freq>>12)&7)|0x20;
chan[i].freqL=(chan[i].freq>>4)&0xff;
} else if (chan[i].freq>=8192) {
chan[i].freqH=((chan[i].freq>>11)&7)|0x18;
chan[i].freqL=(chan[i].freq>>3)&0xff;
} else if (chan[i].freq>=4096) {
chan[i].freqH=((chan[i].freq>>10)&7)|0x10;
chan[i].freqL=(chan[i].freq>>2)&0xff;
} else if (chan[i].freq>=2048) {
chan[i].freqH=((chan[i].freq>>9)&7)|0x08;
chan[i].freqL=(chan[i].freq>>1)&0xff;
} else {
chan[i].freqH=(chan[i].freq>>8)&7;
chan[i].freqL=chan[i].freq&0xff;
}
writes.emplace(chanOffs[i]+0xa4,chan[i].freqH);
writes.emplace(chanOffs[i]+0xa0,chan[i].freqL);
}
if (chan[i].keyOn) {
writes.emplace(0x28,0xf0|konOffs[i]);
chan[i].keyOn=false;
}
@ -99,6 +124,7 @@ void DivPlatformGenesis::tick() {
#define rWrite(a,v) pendingWrites[a]=v;
int DivPlatformGenesis::dispatch(DivCommand c) {
if (c.chan>5) return 0;
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
if (c.chan==5 && dacMode) {
@ -112,8 +138,6 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
dacRate=dacRates[parent->song.sample[dacSample]->rate];
break;
}
if (c.chan>5) break;
//chan[c.chan].freq=16.4f*pow(2.0f,((float)c.value/12.0f));
DivInstrument* ins=parent->song.ins[chan[c.chan].ins];
if (chan[c.chan].insChanged) {
@ -136,8 +160,8 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
rWrite(chanOffs[c.chan]+0xb0,(ins->fm.alg&7)|(ins->fm.fb<<3));
rWrite(chanOffs[c.chan]+0xb4,(chan[c.chan].pan<<6)|(ins->fm.fms&7)|((ins->fm.ams&3)<<4));
}
chan[c.chan].freqH=((c.value/12)<<3)|(notes[c.value%12]>>8);
chan[c.chan].freqL=notes[c.value%12];
chan[c.chan].freq=644.0f*pow(2.0f,((float)c.value/12.0f));
chan[c.chan].freqChanged=true;
chan[c.chan].keyOn=true;
chan[c.chan].active=true;
break;

5
src/engine/platform/genesis.h
View file

@ -5,12 +5,13 @@
class DivPlatformGenesis: public DivDispatch {
struct Channel {
unsigned char freqH, freqL;
int freq;
unsigned char ins;
signed char konCycles;
bool active, insChanged, keyOn, keyOff;
bool active, insChanged, freqChanged, keyOn, keyOff;
signed char vol;
unsigned char pan;
Channel(): freqH(0), freqL(0), ins(0), active(false), insChanged(true), keyOn(false), keyOff(false), vol(0), pan(3) {}
Channel(): freqH(0), freqL(0), freq(0), ins(0), active(false), insChanged(true), freqChanged(false), keyOn(false), keyOff(false), vol(0), pan(3) {}
};
Channel chan[10];
struct QueuedWrite {