etc
/
furnace
mirror of https://github.com/tildearrow/furnace.git
0
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Lynx: using DAC output for PCM

This commit is contained in:
Waldemar Pawlaszek 2022-05-27 08:10:34 +02:00
parent 905aa1b1a1
commit 70aa8f7682
1 changed files with 7 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
src/engine/platform/lynx.cpp
View File

@ -25,6 +25,7 @@
#define WRITE_VOLUME(ch,v) rWrite(0x20+(ch<<3),(v))
#define WRITE_FEEDBACK(ch,v) rWrite(0x21+(ch<<3),(v))
#define WRITE_OUTPUT(ch,v) rWrite(0x22+(ch<<3),(v))
#define WRITE_LFSR(ch,v) rWrite(0x23+(ch<<3),(v))
#define WRITE_BACKUP(ch,v) rWrite(0x24+(ch<<3),(v))
#define WRITE_CONTROL(ch,v) rWrite(0x25+(ch<<3),(v))
@ -151,10 +152,10 @@ void DivPlatformLynx::acquire(short* bufL, short* bufR, size_t start, size_t len
DivSample* s=parent->getSample(chan[i].sample);
if (s!=NULL) {
if (isMuted[i]) {
WRITE_VOLUME(i,0);
WRITE_OUTPUT(i,0);
chan[i].samplePos++;
} else {
WRITE_VOLUME(i,(s->data8[chan[i].samplePos++]*chan[i].outVol)>>7);
WRITE_OUTPUT(i,s->data8[chan[i].samplePos++]);
}
if (chan[i].samplePos>=(int)s->samples) {
chan[i].sample=-1;
@ -172,12 +173,8 @@ void DivPlatformLynx::tick(bool sysTick) {
for (int i=0; i<4; i++) {
chan[i].std.next();
if (chan[i].std.vol.had) {
if (chan[i].pcm) {
chan[i].outVol=((chan[i].vol&127)*MIN(64,chan[i].std.vol.val))>>6;
} else {
chan[i].outVol=((chan[i].vol&127)*MIN(127,chan[i].std.vol.val))>>7;
WRITE_VOLUME(i,(isMuted[i]?0:(chan[i].outVol&127)));
}
chan[i].outVol=((chan[i].vol&127)*MIN(127,chan[i].std.vol.val))>>7;
WRITE_VOLUME(i,(isMuted[i]?0:(chan[i].outVol&127)));
}
if (chan[i].std.arp.had) {
if (!chan[i].inPorta) {
@ -244,11 +241,6 @@ void DivPlatformLynx::tick(bool sysTick) {
}
}
chan[i].sampleFreq=off*parent->calcFreq(chan[i].sampleBaseFreq,chan[i].pitch,false,2,chan[i].pitch2,1,1);
WRITE_FEEDBACK(i,0);
WRITE_LFSR(i,0);
WRITE_OTHER(i,0);
WRITE_CONTROL(i,0x18);
WRITE_BACKUP(i,2);
} else {
if (chan[i].lfsr >= 0) {
WRITE_LFSR(i, (chan[i].lfsr&0xff));
@ -300,7 +292,8 @@ int DivPlatformLynx::dispatch(DivCommand c) {
}
case DIV_CMD_NOTE_OFF:
chan[c.chan].active=false;
WRITE_VOLUME(c.chan, 0);
WRITE_VOLUME(c.chan,0);
WRITE_CONTROL(c.chan,0);
chan[c.chan].macroInit(NULL);
if (chan[c.chan].pcm) {
chan[c.chan].pcm=false;