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Fixes the use-sustain flag.

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This commit is contained in:
Thomas Harte 2020-05-08 20:49:39 -04:00
parent dc5654b941
commit 792aed242d
2 changed files with 11 additions and 8 deletions
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17
Components/OPL2/OPLL.cpp
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@ -175,7 +175,12 @@ void OPLL::set_channel_period(int channel) {
key_level_scalers_[channel + 9].set_period(channels_[channel].period, channels_[channel].octave);
}
const uint8_t *OPLL::instrument_definition(int instrument) {
const uint8_t *OPLL::instrument_definition(int instrument, int channel) {
// Divert to the appropriate rhythm instrument if in rhythm mode.
if(channel >= 6 && rhythm_mode_enabled_) {
return &percussion_patch_set[(channel - 6) * 8];
}
// Instrument 0 is the custom instrument.
if(!instrument) return custom_instrument_;
@ -193,9 +198,7 @@ void OPLL::install_instrument(int channel) {
auto &modulator_phase = phase_generators_[channel + 9];
auto &modulator_scaler = key_level_scalers_[channel + 9];
const uint8_t *const instrument = ((channel < 6) || !rhythm_mode_enabled_) ?
instrument_definition(channels_[channel].instrument) :
&percussion_patch_set[(channel - 6) * 8];
const uint8_t *const instrument = instrument_definition(channels_[channel].instrument, channel);
// Bytes 0 (modulator) and 1 (carrier):
//
@ -256,9 +259,9 @@ void OPLL::install_instrument(int channel) {
}
void OPLL::set_use_sustain(int channel) {
const uint8_t *const instrument = instrument_definition(channels_[channel].instrument);
envelope_generators_[channel + 0].set_sustain_level((instrument[1] & 0x20) || channels_[channel].use_sustain);
envelope_generators_[channel + 9].set_sustain_level((instrument[0] & 0x20) || channels_[channel].use_sustain);
const uint8_t *const instrument = instrument_definition(channels_[channel].instrument, channel);
envelope_generators_[channel + 0].set_use_sustain_level((instrument[1] & 0x20) || channels_[channel].use_sustain);
envelope_generators_[channel + 9].set_use_sustain_level((instrument[0] & 0x20) || channels_[channel].use_sustain);
}
// MARK: - Output generation.

2
Components/OPL2/OPLL.hpp
View File

@ -117,7 +117,7 @@ class OPLL: public OPLBase<OPLL> {
void set_use_sustain(int channel);
/// @returns The 8-byte definition of instrument @c instrument.
const uint8_t *instrument_definition(int instrument);
const uint8_t *instrument_definition(int instrument, int channel);
};
}