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Improve polyphony.

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This commit is contained in:
bruce 2013-09-14 01:40:28 +08:00
parent 94820594d4
commit 65b539675a
2 changed files with 19 additions and 3 deletions
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20
Source/PluginProcessor.cpp
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@ -100,7 +100,9 @@ JuceOplvstiAudioProcessor::JuceOplvstiAudioProcessor()
program_order.push_back(it->first);
}
setCurrentProgram(0);
for (int i = 0; i < Hiopl::CHANNELS+1; i++) {
active_notes[i] = NO_NOTE;
}
}
JuceOplvstiAudioProcessor::~JuceOplvstiAudioProcessor()
@ -278,15 +280,27 @@ void JuceOplvstiAudioProcessor::processBlock (AudioSampleBuffer& buffer, MidiBuf
MidiMessage midi_message(0);
int sample_number;
while (midi_buffer_iterator.getNextEvent(midi_message,sample_number)) {
int ch = 1 + (midi_message.getNoteNumber() % Hiopl::CHANNELS); // kind of hackish, but..
//int ch = 1 + (midi_message.getNoteNumber() % Hiopl::CHANNELS); // kind of hackish, but..
if (midi_message.isNoteOn()) {
//note on at sample_number samples after
//the beginning of the current buffer
float noteHz = (float)MidiMessage::getMidiNoteInHertz(midi_message.getNoteNumber());
int n = midi_message.getNoteNumber();
float noteHz = (float)MidiMessage::getMidiNoteInHertz(n);
int ch = 1;
while (ch <= Hiopl::CHANNELS && NO_NOTE != active_notes[ch]) {
ch += 1;
}
Opl->KeyOn(ch, noteHz);
active_notes[ch] = n;
}
else if (midi_message.isNoteOff()) {
int n = midi_message.getNoteNumber();
int ch = 1;
while (ch <= Hiopl::CHANNELS && n != active_notes[ch]) {
ch += 1;
}
Opl->KeyOff(ch);
active_notes[ch] = NO_NOTE;
}
}
Opl->Generate(buffer.getNumSamples(), buffer.getSampleData(0));

2
Source/PluginProcessor.h
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@ -77,6 +77,8 @@ private:
std::map<String, std::vector<float>> programs;
std::vector<String> program_order;
int i_program;
static const int NO_NOTE=-1;
int active_notes[Hiopl::CHANNELS+1]; // keyed by channel
//==============================================================================
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (JuceOplvstiAudioProcessor)