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package com.cycling74.msp;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.UnsupportedAudioFileException;
import com.cycling74.max.MessageReceiver;
/**
* Work in progress, target: 0.8.4
*/
class AudioFileBuffer {
/** file buffer value */
public float buf[][];
/** Value of the message that will be sended to MessageReceiver when the file will be loaded */
public static final int FINISHED_READING = 1;
private MessageReceiver callback = null;
private String file;
private AudioFormat audioFormat;
private AudioFormat targetAudioFormat;
// getters values
private float sampleRate;
private int sampleBitFormat;
private boolean sampleBigEndian;
private int sampleChannels;
private long sampleFrames;
public AudioFileBuffer(String filename) throws FileNotFoundException, IOException, UnsupportedAudioFileException {
open(filename);
}
public AudioFileBuffer(String filename, MessageReceiver callback) throws FileNotFoundException, IOException, UnsupportedAudioFileException {
this.callback = callback;
open(filename);
}
public void open(String filename) throws FileNotFoundException, IOException, UnsupportedAudioFileException {
// file format
sampleRate = 0;
sampleBitFormat = 0;
sampleChannels = 0;
sampleFrames = 0;
AudioInputStream sourceAudioInputStream = AudioSystem.getAudioInputStream( new FileInputStream(file) );
AudioFormat sourceAudioFormat = sourceAudioInputStream.getFormat();
targetAudioFormat = new AudioFormat(
AudioFormat.Encoding.PCM_UNSIGNED, // Encoding
getSystemSampleRate(), // Sample rate
16, // bit
sourceAudioFormat.getChannels(), // channel
sourceAudioFormat.getFrameSize(), // frame size
sourceAudioFormat.getFrameRate(), // frame rate
false ); // big Endian
AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(audioFormat, sourceAudioInputStream );
FileLoader thread = new FileLoader(audioInputStream);
new Thread(thread).start();
}
class FileLoader implements Runnable {
AudioInputStream ais;
FileLoader(AudioInputStream input) {
ais = input;
}
public void run() {
try {
buf = new float[audioFormat.getChannels()][];
for (int i=0;ais.available() != 0;i++) {
//doc.content[i] = audioInputStream.read() / 65535;
}
if ( callback != null )
callback.messageReceived(this, FINISHED_READING, null);
} catch ( IOException e ) {
}
}
}
public float getSampleRate() {
return sampleRate;
}
public int getSampleSizeInBits() {
return sampleBitFormat;
}
public boolean isBigEndian() {
return sampleBigEndian;
}
public long getFrameLength() {
return sampleFrames;
}
public int getChannels() {
return sampleChannels;
}
public float getLengthMs() {
return buf[0].length / (sampleRate / 1000);
}
private native int getSystemSampleRate();
}
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