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GA20: implement getSamplePos()

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tildearrow 2023-03-21 03:56:17 -05:00
parent 5f5617fc2c
commit 5af3804195
4 changed files with 23 additions and 1 deletions
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4
src/engine/platform/amiga.cpp
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@ -768,10 +768,12 @@ DivMacroInt* DivPlatformAmiga::getChanMacroInt(int ch) {
DivSamplePos DivPlatformAmiga::getSamplePos(int ch) {
if (ch>=4) return DivSamplePos();
if (chan[ch].sample<0 || chan[ch].sample>=parent->song.sampleLen) return DivSamplePos();
int audPer=amiga.audPer[ch];
if (audPer<1) audPer=1;
return DivSamplePos(
chan[ch].sample,
amiga.dmaLoc[ch]-sampleOff[chan[ch].sample],
chipClock/amiga.audPer[ch]
chipClock/audPer
);
}

12
src/engine/platform/ga20.cpp
View file

@ -336,6 +336,18 @@ DivMacroInt* DivPlatformGA20::getChanMacroInt(int ch) {
return &chan[ch].std;
}
DivSamplePos DivPlatformGA20::getSamplePos(int ch) {
if (ch>=4) return DivSamplePos();
if (chan[ch].sample<0 || chan[ch].sample>=parent->song.sampleLen) return DivSamplePos();
if (!ga20.is_playing(ch)) return DivSamplePos();
unsigned char f=chan[ch].freq;
return DivSamplePos(
chan[ch].sample,
ga20.get_position(ch)-sampleOffGA20[chan[ch].sample],
chipClock/(4*(0x100-(int)f))
);
}
DivDispatchOscBuffer* DivPlatformGA20::getOscBuffer(int ch) {
return oscBuf[ch];
}

1
src/engine/platform/ga20.h
View file

@ -78,6 +78,7 @@ class DivPlatformGA20: public DivDispatch, public iremga20_intf {
virtual int dispatch(DivCommand c) override;
virtual void* getChanState(int chan) override;
virtual DivMacroInt* getChanMacroInt(int ch) override;
virtual DivSamplePos getSamplePos(int ch) override;
virtual DivDispatchOscBuffer* getOscBuffer(int chan) override;
virtual unsigned char* getRegisterPool() override;
virtual int getRegisterPoolSize() override;

7
src/engine/platform/sound/ga20/iremga20.h
View file

@ -39,6 +39,12 @@ public:
u8 read(u32 offset);
inline void set_mute(const int ch, const bool mute) { m_channel[ch & 3].mute = mute; }
inline unsigned int get_position(const int ch) {
return m_channel[ch&3].pos;
}
inline bool is_playing(const int ch) {
return m_channel[ch&3].play;
}
// device-level overrides
void device_reset();
@ -46,6 +52,7 @@ public:
// sound stream update overrides
void sound_stream_update(short** outputs, int len);
private:
struct channel_def
{