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LTVA1 2024-08-22 20:26:54 +03:00 committed by tildearrow
parent 8a18f962f9
commit 9f9638931d
5 changed files with 44 additions and 13 deletions
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4
src/engine/platform/snes.cpp
View file

@ -841,6 +841,8 @@ void DivPlatformSNES::reset() {
memcpy(sampleMem,copyOfSampleMem,65536);
dsp.init(sampleMem);
dsp.set_output(NULL,0);
dsp.setupInterpolation(interpolationOn);
memset(regPool,0,128);
// this can't be 0 or channel 1 won't play
// this can't be 0x100 either as that's used by SPC700 page 1 and the stack
@ -1023,6 +1025,8 @@ void DivPlatformSNES::setFlags(const DivConfig& flags) {
initEchoFIR[7]=flags.getInt("echoFilter7",0);
initEchoMask=flags.getInt("echoMask",0);
interpolationOn=flags.getBool("interpolationOn",true);
}
int DivPlatformSNES::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {

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

@ -69,6 +69,7 @@ class DivPlatformSNES: public DivDispatch {
bool writeEcho;
bool writeDryVol;
bool echoOn;
bool interpolationOn;
bool initEchoOn;
signed char initEchoVolL;

15
src/engine/platform/sound/snes/SPC_DSP.cpp
View file

@ -135,9 +135,19 @@ static short const gauss [512] =
1299,1300,1300,1301,1302,1302,1303,1303,1303,1304,1304,1304,1304,1304,1305,1305,
};
void SPC_DSP::setupInterpolation(bool interpolate)
{
for(int i = 0; i < voice_count; i++)
{
m.voices[i].interpolate = interpolate;
}
}
inline int SPC_DSP::interpolate( voice_t const* v )
{
// Make pointers into gaussian based on fractional position between samples
if(v->interpolate)
{
int offset = v->interp_pos >> 4 & 0xFF;
short const* fwd = gauss + 255 - offset;
short const* rev = gauss + offset; // mirror left half of gaussian
@ -153,6 +163,11 @@ inline int SPC_DSP::interpolate( voice_t const* v )
CLAMP16( out );
out &= ~1;
return out;
}
else
{
return v->buf [(v->interp_pos >> 12) + v->buf_pos]; //Furnace addition -- no interpolation
}
}

4
src/engine/platform/sound/snes/SPC_DSP.h
View file

@ -27,6 +27,9 @@ public:
// output buffer could hold.
int sample_count() const;
// Furnace addition: disable/enable Gaussian interpolation
void setupInterpolation(bool interpolate);
// Emulation
// Resets DSP to power-on state
@ -122,6 +125,7 @@ public:
int hidden_env; // used by GAIN mode 7, very obscure quirk
uint8_t t_envx_out;
sample_t out[2]; // Furnace addition, for per-channel oscilloscope
bool interpolate; // Furnace addition, to disable interpolation
};
// Furnace addition, gets a voice

7
src/gui/sysConf.cpp
View file

@ -1969,6 +1969,8 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
echoFilter[6]=flags.getInt("echoFilter6",0);
echoFilter[7]=flags.getInt("echoFilter7",0);
bool interpolationOn=flags.getBool("interpolationOn",true);
ImGui::Text(_("Volume scale:"));
if (CWSliderInt(_("Left##VolScaleL"),&vsL,0,127)) {
if (vsL<0) vsL=0;
@ -2084,6 +2086,10 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
ImGui::Text(_("sum: %d"),filterSum);
ImGui::PopStyleColor();
if (ImGui::Checkbox(_("Gaussian interpolation"),&interpolationOn)) {
altered=true;
}
if (altered) {
e->lockSave([&]() {
flags.set("volScaleL",127-vsL);
@ -2102,6 +2108,7 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
flags.set("echoFilter6",echoFilter[6]);
flags.set("echoFilter7",echoFilter[7]);
flags.set("echoMask",echoMask);
flags.set("interpolationOn",interpolationOn);
});
}