/*
* Copyright (c) 1999, 2002, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.audio;
import java.io.InputStream;
import java.io.DataInputStream;
import java.io.FilterInputStream;
import java.io.ByteArrayInputStream;
import java.io.BufferedInputStream;
import java.io.IOException;
import javax.sound.sampled.*;
import javax.sound.midi.*;
/**
* Convert an InputStream to an AudioStream.
*
*/
public class AudioStream extends FilterInputStream {
// AudioContainerInputStream acis;
protected AudioInputStream ais = null;
protected AudioFormat format = null;
protected MidiFileFormat midiformat = null;
protected InputStream stream = null;
/*
* create the AudioStream; if we survive without throwing
* an exception, we should now have some subclass of
* ACIS with all the header info already read
*/
public AudioStream(InputStream in) throws IOException {
super(in);
stream = in;
if( in.markSupported() == false ) {
stream = new BufferedInputStream( in, 1024 );
}
try {
ais = AudioSystem.getAudioInputStream( stream );
format = ais.getFormat();
this.in = ais;
} catch (UnsupportedAudioFileException e ) {
// not an audio file, see if it's midi...
try {
midiformat = MidiSystem.getMidiFileFormat( stream );
} catch (InvalidMidiDataException e1) {
throw new IOException("could not create audio stream from input stream");
}
}
}
/**
* A blocking read.
*/
/* public int read(byte buf[], int pos, int len) throws IOException {
return(acis.readFully(buf, pos, len));
}
*/
/**
* Get the data.
*/
public AudioData getData() throws IOException {
int length = getLength();
//limit the memory to 1M, so too large au file won't load
if (length < 1024*1024) {
byte [] buffer = new byte[length];
try {
ais.read(buffer, 0, length);
} catch (IOException ex) {
throw new IOException("Could not create AudioData Object");
}
return new AudioData(format, buffer);
}
/* acis.setData();
if (acis.stream instanceof ByteArrayInputStream) {
Format[] format = acis.getFormat();
byte[] bytes = acis.getBytes();
if (bytes == null)
throw new IOException("could not create AudioData object: no data received");
return new AudioData((AudioFormat)format[0], bytes);
}
*/
throw new IOException("could not create AudioData object");
}
public int getLength() {
if( ais != null && format != null ) {
return (int) (ais.getFrameLength() *
ais.getFormat().getFrameSize() );
} else if ( midiformat != null ) {
return (int) midiformat.getByteLength();
} else {
return -1;
}
}
}