With this tutorial we are going to see how to get MIDI audio file properties. This is a useful operation when you want to inform the user about several important properties of the audio files.
Basically in order to get MIDI audio file properties one should follow these steps:
- Obtain the default
Sequencerconnected to a default device usingMidiSystem.getSequencer(). - Create a stream from a file to the MIDI file.
- Use
MidiSystem.getMidiFileFormatto obtain the MIDI file format of the data in the specified input stream. This will return you anMidiFileFormatobject.
Let’s see the code snippet that follows:
package com.javacodegeeks.snippets.desktop;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import javax.sound.midi.MidiFileFormat;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.Sequencer;
public class GetMidiAudioFileProperties {
public static void main(String[] args) throws Exception {
// Obtains the default Sequencer connected to a default device.
Sequencer sequencer = MidiSystem.getSequencer();
// create a stream from a file
InputStream is = new BufferedInputStream(new FileInputStream(new File("midifile.mid")));
// Obtain the MIDI file format of the data in the specified input stream.
MidiFileFormat fformat = MidiSystem.getMidiFileFormat(is);
// Obtain the MIDI file type.
switch (fformat.getType()) {
case 0:
System.out.println("mid file format");
break;
case 1:
System.out.println("rmf file format");
break;
}
// Sets the current sequence on which the sequencer operates.
// The stream must point to MIDI file data.
sequencer.setSequence(is);
// Obtains the length of the current sequence, expressed in microseconds
long durationMicroSecs = sequencer.getMicrosecondLength();
long durationSecs = durationMicroSecs/1000000;
System.out.println("durationInSecs " + durationSecs);
}
}Output:
rmf file format
durationInSecs 122
This was an example on how to get Midi audio file properties.
