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channel mute/solo!

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This commit is contained in:
tildearrow 2021-12-18 03:25:42 -05:00
parent c4c019e593
commit b3b66ecbdb
27 changed files with 416 additions and 48 deletions
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23
src/engine/platform/gb.cpp
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@ -24,6 +24,17 @@ void DivPlatformGB::updateWave() {
}
}
static unsigned char chanMuteMask[4]={
0xee, 0xdd, 0xbb, 0x77
};
unsigned char DivPlatformGB::procMute() {
return lastPan&(isMuted[0]?chanMuteMask[0]:0xff)
&(isMuted[1]?chanMuteMask[1]:0xff)
&(isMuted[2]?chanMuteMask[2]:0xff)
&(isMuted[3]?chanMuteMask[3]:0xff);
}
static unsigned char gbVolMap[16]={
0x00, 0x00, 0x00, 0x00,
0x60, 0x60, 0x60, 0x60,
@ -153,6 +164,11 @@ void DivPlatformGB::tick() {
}
}
void DivPlatformGB::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
rWrite(0x25,procMute());
}
int DivPlatformGB::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON:
@ -233,7 +249,7 @@ int DivPlatformGB::dispatch(DivCommand c) {
lastPan&=~(0x11<<c.chan);
if (c.value==0) c.value=0x11;
lastPan|=c.value<<c.chan;
rWrite(0x25,lastPan);
rWrite(0x25,procMute());
break;
}
case DIV_CMD_LEGATO:
@ -280,8 +296,8 @@ void DivPlatformGB::reset() {
GB_set_sample_rate(gb,rate);
// enable all channels
GB_apu_write(gb,0x26,0x80);
GB_apu_write(gb,0x25,0xff);
lastPan=0xff;
GB_apu_write(gb,0x25,procMute());
}
bool DivPlatformGB::isStereo() {
@ -289,6 +305,9 @@ bool DivPlatformGB::isStereo() {
}
int DivPlatformGB::init(DivEngine* p, int channels, int sugRate, bool pal) {
for (int i=0; i<4; i++) {
isMuted[i]=false;
}
parent=p;
rate=262144;
gb=new GB_gameboy_t;