Hello everyone,
When using the following source codes to play a local .wav file, I always find .wav files can not played. Does anyone know what is the trouble?
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
public class Play {
/** Plays audio from given file names. */
public static void main( String [] args ) {
// Check for given sound file names.
if (args.length < 1) {
System.out.println( "Play usage:" );
System.out.println( "\tjava Play <sound file names>*" );
System.exit( 0 );
}
// Process arguments.
for (int i = 0; i < args.length; i++ )
playAudioFile( args[ i ] );
// Must exit explicitly since audio creates non-daemon threads.
System.exit( 0 );
} // main
public static void playAudioFile( String fileName ) {
File soundFile = new File( fileName );
try {
// Create a stream from the given file.
// Throws IOException or UnsupportedAudioFileException
AudioInputStream audioInputStream = AudioSystem.getAudioInputStream( soundFile );
// AudioSystem.getAudioInputStream( inputStream ); // alternate audio stream from inputstream
playAudioStream( audioInputStream );
} catch ( Exception e ) {
System.out.println( "Problem with file " + fileName + ":" );
e.printStackTrace();
}
} // playAudioFile
/** Plays audio from the given audio input stream. */
public static void playAudioStream( AudioInputStream audioInputStream ) {
// Audio format provides information like sample rate, size, channels.
AudioFormat audioFormat = audioInputStream.getFormat();
System.out.println( "Play input audio format=" + audioFormat );
// Open a data line to play our type of sampled audio.
// Use SourceDataLine for play and TargetDataLine for record.
DataLine.Info info = new DataLine.Info( SourceDataLine.class, audioFormat );
if ( !AudioSystem.isLineSupported( info ) ) {
System.out.println( "Play.playAudioStream does not handle this type of audio on this system." );
return;
}
try {
// Create a SourceDataLine for play back (throws LineUnavailableException).
SourceDataLine dataLine = (SourceDataLine) AudioSystem.getLine( info );
// System.out.println( "SourceDataLine class=" + dataLine.getClass() );
// The line acquires system resources (throws LineAvailableException).
dataLine.open( audioFormat );
// Adjust the volume on the output line.
if( dataLine.isControlSupported( FloatControl.Type.MASTER_GAIN ) ) {
FloatControl volume = (FloatControl) dataLine.getControl( FloatControl.Type.MASTER_GAIN );
volume.setValue( 100.0F );
}
// Allows the line to move data in and out to a port.
dataLine.start();
// Create a buffer for moving data from the audio stream to the line.
int bufferSize = (int) audioFormat.getSampleRate() * audioFormat.getFrameSize();
byte [] buffer = new byte[ bufferSize ];
// Move the data until done or there is an error.
try {
int bytesRead = 0;
while ( bytesRead >= 0 ) {
bytesRead = audioInputStream.read( buffer, 0, buffer.length );
if ( bytesRead >= 0 ) {
// System.out.println( "Play.playAudioStream bytes read=" + bytesRead +
// ", frame size=" + audioFormat.getFrameSize() + ", frames read=" + bytesRead / audioFormat.getFrameSize() );
// Odd sized sounds throw an exception if we don't write the same amount.
int framesWritten = dataLine.write( buffer, 0, bytesRead );
}
} // while
} catch ( IOException e ) {
e.printStackTrace();
}
System.out.println( "Play.playAudioStream draining line." );
// Continues data line I/O until its buffer is drained.
dataLine.drain();
System.out.println( "Play.playAudioStream closing line." );
// Closes the data line, freeing any resources such as the audio device.
dataLine.close();
} catch ( LineUnavailableException e ) {
e.printStackTrace();
}
} // playAudioStream
} // Play
When using the above program to play a local .wav file, errors such as the following messages are thrown,
Play input audio format=PCM_UNSIGNED, 11025.0 Hz, 8 bit, mono, audio data
Play.playAudioStream does not handle this type of audio on this system.
I have changed many .wav files, but the message "Play.playAudioStream does not handle this type of audio on this system." is always printed and no sound is heard.
Thanks in advance,
George
