[英]Getting midi messages from Receiver in Java
我正在尝试使用接收器,以便我可以提取正在播放的midi事件信息。 我想听演奏的音符并与之同步是一件大事。 我已经阅读了文档,但不确定如何实际使用发送器/接收器。 如果有人可以帮助我指出如何从接收方获取Midi事件的正确方向,我将不胜感激。
编辑:下面提供的可能重复内容并未说明接收器的实际工作方式。 它提供了实现的源代码,但作为一个初学者,源代码对于我来说太高级了。
import javax.sound.midi.*;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
public class Main {
public static Sequencer sequencer;
public static Sequence sequence;
public static Receiver synthRcvr;
public static Transmitter seqTrans;
public static void main(String[] args) {
try {
sequencer = MidiSystem.getSequencer();
sequence = MidiSystem.getSequence(new File("test.midi"));
seqTrans = sequencer.getTransmitter();
synthRcvr = sequencer.getReceiver();
seqTrans.setReceiver(synthRcvr);
sequencer.open();
sequencer.setSequence(sequence);
sequencer.start();
} catch (IOException | MidiUnavailableException | InvalidMidiDataException e) {
System.out.println(e);
}
}
这是收听所有Midi消息的解决方案。
import javax.sound.midi.*;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
public class Main {
public static Receiver synthRcvr = new CustomReceiver();
public static Transmitter seqTrans;
public static Synthesizer synth;
public static void main(String[] args) {
try {
sequencer = MidiSystem.getSequencer();
sequence = MidiSystem.getSequence(new File("test.midi"));
Sequencer sequencer = MidiSystem.getSequencer();
seqTrans = sequencer.getTransmitter();
seqTrans.setReceiver(synthRcvr);
sequencer.open();
sequencer.setSequence(sequence);
sequencer.start();
} catch (IOException | MidiUnavailableException | InvalidMidiDataException e) {
System.out.println(e);
}
}
这是实现接收者的类:
import javax.sound.midi.MidiMessage;
import javax.sound.midi.Receiver;
public class CustomReceiver implements Receiver {
public CustomReceiver() {
}
@Override
public void send(MidiMessage message, long timeStamp) {
// Process midi messages here
}
@Override
public void close() {
}
}
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