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MSM5232: channel muting

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tildearrow 2022-10-01 03:32:13 -05:00
parent 81ac2ba3b1
commit aed738e0d5
3 changed files with 20 additions and 10 deletions
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3
src/engine/platform/msm5232.cpp
View file

@ -226,7 +226,7 @@ int DivPlatformMSM5232::dispatch(DivCommand c) {
void DivPlatformMSM5232::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
// TODO: this
msm->mute(ch,mute);
}
void DivPlatformMSM5232::forceIns() {
@ -281,6 +281,7 @@ void DivPlatformMSM5232::reset() {
for (int i=0; i<8; i++) {
rWrite(i,0);
msm->mute(i,isMuted[i]);
}
}

25
src/engine/platform/sound/oki/msm5232.cpp
View file

@ -225,8 +225,13 @@ void msm5232_device::init_voice(int i)
m_voi[i].eg = 0.0;
m_voi[i].eg_arm = 0;
m_voi[i].pitch = -1.0;
m_voi[i].mute = false;
}
void msm5232_device::mute(int voice, bool mute)
{
m_voi[voice].mute = mute;
}
void msm5232_device::gate_update()
{
@ -571,16 +576,18 @@ void msm5232_device::TG_group_advance(int groupidx)
}
/* calculate signed output */
o16 += ( (out16-(1<<(STEP_SH-1))) * voi->egvol) >> STEP_SH;
o8 += ( (out8 -(1<<(STEP_SH-1))) * voi->egvol) >> STEP_SH;
o4 += ( (out4 -(1<<(STEP_SH-1))) * voi->egvol) >> STEP_SH;
o2 += ( (out2 -(1<<(STEP_SH-1))) * voi->egvol) >> STEP_SH;
if (!voi->mute) {
o16 += ( (out16-(1<<(STEP_SH-1))) * voi->egvol) >> STEP_SH;
o8 += ( (out8 -(1<<(STEP_SH-1))) * voi->egvol) >> STEP_SH;
o4 += ( (out4 -(1<<(STEP_SH-1))) * voi->egvol) >> STEP_SH;
o2 += ( (out2 -(1<<(STEP_SH-1))) * voi->egvol) >> STEP_SH;
if (i == 1 && groupidx == 1)
{
solo16 += ( (out16-(1<<(STEP_SH-1))) << 11) >> STEP_SH;
solo8 += ( (out8 -(1<<(STEP_SH-1))) << 11) >> STEP_SH;
}
if (i == 1 && groupidx == 1)
{
solo16 += ( (out16-(1<<(STEP_SH-1))) << 11) >> STEP_SH;
solo8 += ( (out8 -(1<<(STEP_SH-1))) << 11) >> STEP_SH;
}
}
voi++;
i--;

2
src/engine/platform/sound/oki/msm5232.h
View file

@ -19,6 +19,7 @@ public:
void write(unsigned int offset, uint8_t data);
void set_clock(int clock);
void mute(int voice, bool mute);
// device-level overrides
void device_start();
@ -34,6 +35,7 @@ public:
private:
struct VOICE {
uint8_t mode;
bool mute;
int TG_count_period;
int TG_count;