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/**
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
* Copyright (c) 2011 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* -Redistribution of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* -Redistribution in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind.
* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS
* LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A
* RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
* IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT
* OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR
* PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS
* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use in the
* design, construction, operation or maintenance of any nuclear facility.
*/
package com.jogamp.openal.util;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteOrder;
import com.jogamp.openal.ALException;
/**
* A Loader utility for (.wav) files. Creates a WAVData object containing the
* data used by the AL.alBufferData method.
*
* @author Athomas Goldberg, et.al
*/
public class WAVLoader {
// private static final int BUFFER_SIZE = 128000;
/**
* This method loads a (.wav) file into a WAVData object.
*
* @param filename The name of the (.wav) file
*
* @return a WAVData object containing the audio data
*
* @throws UnsupportedAudioFileException if the format of the audio if not
* supported.
* @throws IOException If the file can no be found or some other IO error
* occurs
*/
public static WAVData loadFromFile(String filename) throws IOException {
File soundFile = new File(filename);
InputStream is = new FileInputStream(soundFile);
return loadFromStreamImpl(is);
}
/**
* This method loads a (.wav) file into a WAVData object.
*
* @param stream An InputStream for the .WAV stream.
*
* @return a WAVData object containing the audio data
*
* @throws UnsupportedAudioFileException if the format of the audio if not
* supported.
* @throws IOException If the file can no be found or some other IO error
* occurs
*/
public static WAVData loadFromStream(InputStream stream) throws IOException {
return loadFromStreamImpl(stream);
}
private static long readUnsignedIntLittleEndian(DataInputStream is) throws IOException {
byte[] buf = new byte[4];
is.readFully(buf);
return (buf[0] & 0xFF | ((buf[1] & 0xFF) << 8) | ((buf[2] & 0xFF) << 16) | ((buf[3] & 0xFF) << 24));
}
private static short readUnsignedShortLittleEndian(DataInputStream is) throws IOException {
byte[] buf = new byte[2];
is.readFully(buf);
return (short) (buf[0] & 0xFF | ((buf[1] & 0xFF) << 8));
}
private static WAVData loadFromStreamImpl(InputStream aIn) throws IOException {
/**
* references:
* http://www.sonicspot.com/guide/wavefiles.html
* https://ccrma.stanford.edu/courses/422/projects/WaveFormat/
* http://stackoverflow.com/questions/1111539/is-the-endianness-of-format-params-guaranteed-in-riff-wav-files
* http://sharkysoft.com/archive/lava/docs/javadocs/lava/riff/wave/doc-files/riffwave-content.htm
*/
final DataInputStream din;
if (aIn instanceof DataInputStream) {
din = (DataInputStream) aIn;
} else {
din = new DataInputStream(aIn);
}
try {
if (din.readInt() != 0x52494646) {// "RIFF", little endian
//FIXME "RIFX", big endian, read the data in big endian in this case
throw new ALException("Invalid WAV header");
}
// length of the RIFF, unused
readUnsignedIntLittleEndian(din);
if (din.readInt() != 0x57415645) {// "WAVE"
throw new ALException("Invalid WAV header");
}
boolean foundFmt = false;
boolean foundData = false;
short sChannels = 0, sSampleSizeInBits = 0;
long sampleRate = 0;
long chunkLength = 0;
while (!foundData) {
int chunkId = din.readInt();
chunkLength = readUnsignedIntLittleEndian(din);
switch (chunkId) {
case 0x666D7420: // "fmt "
foundFmt = true;
// compression code, unused
readUnsignedShortLittleEndian(din);
sChannels = readUnsignedShortLittleEndian(din);
sampleRate = readUnsignedIntLittleEndian(din);
// bytes per second, unused
readUnsignedIntLittleEndian(din);
// block alignment, unused
readUnsignedShortLittleEndian(din);
sSampleSizeInBits = readUnsignedShortLittleEndian(din);
din.skip(chunkLength - 16);
break;
case 0x66616374: // "fact"
// FIXME: compression format dependent data?
din.skip(chunkLength);
break;
case 0x64617461: // "data"
if (!foundFmt)
throw new ALException(
"WAV fmt chunks must be before data chunks");
foundData = true;
break;
default:
// unrecognized chunk, skips it
din.skip(chunkLength);
}
}
final int channels = (int) sChannels;
final int sampleSizeInBits = sSampleSizeInBits;
final float fSampleRate = (float) sampleRate;
//FIXME big endian not supported yet
final boolean isBigEndian = false;
return WAVData.loadFromStream(aIn, -1, channels, sampleSizeInBits,
Math.round(fSampleRate), isBigEndian ? ByteOrder.BIG_ENDIAN
: ByteOrder.LITTLE_ENDIAN, false);
} finally {
din.close();
}
}
}
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