/*
* Copyright (c) 2007, 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 com.sun.media.sound;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.UnsupportedAudioFileException;
import javax.sound.sampled.AudioFormat.Encoding;
import javax.sound.sampled.spi.AudioFileReader;
/**
* WAVE file reader for files using format WAVE_FORMAT_EXTENSIBLE (0xFFFE).
*
* @author Karl Helgason
*/
public class WaveExtensibleFileReader extends AudioFileReader {
static private class GUID {
long i1;
int s1;
int s2;
int x1;
int x2;
int x3;
int x4;
int x5;
int x6;
int x7;
int x8;
private GUID() {
}
public GUID(long i1, int s1, int s2, int x1, int x2, int x3, int x4,
int x5, int x6, int x7, int x8) {
this.i1 = i1;
this.s1 = s1;
this.s2 = s2;
this.x1 = x1;
this.x2 = x2;
this.x3 = x3;
this.x4 = x4;
this.x5 = x5;
this.x6 = x6;
this.x7 = x7;
this.x8 = x8;
}
public static GUID read(RIFFReader riff) throws IOException {
GUID d = new GUID();
d.i1 = riff.readUnsignedInt();
d.s1 = riff.readUnsignedShort();
d.s2 = riff.readUnsignedShort();
d.x1 = riff.readUnsignedByte();
d.x2 = riff.readUnsignedByte();
d.x3 = riff.readUnsignedByte();
d.x4 = riff.readUnsignedByte();
d.x5 = riff.readUnsignedByte();
d.x6 = riff.readUnsignedByte();
d.x7 = riff.readUnsignedByte();
d.x8 = riff.readUnsignedByte();
return d;
}
public int hashCode() {
return (int) i1;
}
public boolean equals(Object obj) {
if (!(obj instanceof GUID))
return false;
GUID t = (GUID) obj;
if (i1 != t.i1)
return false;
if (s1 != t.s1)
return false;
if (s2 != t.s2)
return false;
if (x1 != t.x1)
return false;
if (x2 != t.x2)
return false;
if (x3 != t.x3)
return false;
if (x4 != t.x4)
return false;
if (x5 != t.x5)
return false;
if (x6 != t.x6)
return false;
if (x7 != t.x7)
return false;
if (x8 != t.x8)
return false;
return true;
}
}
private static String[] channelnames = { "FL", "FR", "FC", "LF",
"BL",
"BR", // 5.1
"FLC", "FLR", "BC", "SL", "SR", "TC", "TFL", "TFC", "TFR", "TBL",
"TBC", "TBR" };
private static String[] allchannelnames = { "w1", "w2", "w3", "w4", "w5",
"w6", "w7", "w8", "w9", "w10", "w11", "w12", "w13", "w14", "w15",
"w16", "w17", "w18", "w19", "w20", "w21", "w22", "w23", "w24",
"w25", "w26", "w27", "w28", "w29", "w30", "w31", "w32", "w33",
"w34", "w35", "w36", "w37", "w38", "w39", "w40", "w41", "w42",
"w43", "w44", "w45", "w46", "w47", "w48", "w49", "w50", "w51",
"w52", "w53", "w54", "w55", "w56", "w57", "w58", "w59", "w60",
"w61", "w62", "w63", "w64" };
private static GUID SUBTYPE_PCM = new GUID(0x00000001, 0x0000, 0x0010,
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
private static GUID SUBTYPE_IEEE_FLOAT = new GUID(0x00000003, 0x0000,
0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
private String decodeChannelMask(long channelmask) {
StringBuffer sb = new StringBuffer();
long m = 1;
for (int i = 0; i < allchannelnames.length; i++) {
if ((channelmask & m) != 0L) {
if (i < channelnames.length) {
sb.append(channelnames[i] + " ");
} else {
sb.append(allchannelnames[i] + " ");
}
}
m *= 2L;
}
if (sb.length() == 0)
return null;
return sb.substring(0, sb.length() - 1);
}
public AudioFileFormat getAudioFileFormat(InputStream stream)
throws UnsupportedAudioFileException, IOException {
stream.mark(200);
AudioFileFormat format;
try {
format = internal_getAudioFileFormat(stream);
} finally {
stream.reset();
}
return format;
}
private AudioFileFormat internal_getAudioFileFormat(InputStream stream)
throws UnsupportedAudioFileException, IOException {
RIFFReader riffiterator = new RIFFReader(stream);
if (!riffiterator.getFormat().equals("RIFF"))
throw new UnsupportedAudioFileException();
if (!riffiterator.getType().equals("WAVE"))
throw new UnsupportedAudioFileException();
boolean fmt_found = false;
boolean data_found = false;
int channels = 1;
long samplerate = 1;
// long framerate = 1;
int framesize = 1;
int bits = 1;
int validBitsPerSample = 1;
long channelMask = 0;
GUID subFormat = null;
while (riffiterator.hasNextChunk()) {
RIFFReader chunk = riffiterator.nextChunk();
if (chunk.getFormat().equals("fmt ")) {
fmt_found = true;
int format = chunk.readUnsignedShort();
if (format != 0xFFFE)
throw new UnsupportedAudioFileException(); // WAVE_FORMAT_EXTENSIBLE
// only
channels = chunk.readUnsignedShort();
samplerate = chunk.readUnsignedInt();
/* framerate = */chunk.readUnsignedInt();
framesize = chunk.readUnsignedShort();
bits = chunk.readUnsignedShort();
int cbSize = chunk.readUnsignedShort();
if (cbSize != 22)
throw new UnsupportedAudioFileException();
validBitsPerSample = chunk.readUnsignedShort();
if (validBitsPerSample > bits)
throw new UnsupportedAudioFileException();
channelMask = chunk.readUnsignedInt();
subFormat = GUID.read(chunk);
}
if (chunk.getFormat().equals("data")) {
data_found = true;
break;
}
}
if (!fmt_found)
throw new UnsupportedAudioFileException();
if (!data_found)
throw new UnsupportedAudioFileException();
Map<String, Object> p = new HashMap<String, Object>();
String s_channelmask = decodeChannelMask(channelMask);
if (s_channelmask != null)
p.put("channelOrder", s_channelmask);
if (channelMask != 0)
p.put("channelMask", channelMask);
// validBitsPerSample is only informational for PCM data,
// data is still encode according to SampleSizeInBits.
p.put("validBitsPerSample", validBitsPerSample);
AudioFormat audioformat = null;
if (subFormat.equals(SUBTYPE_PCM)) {
if (bits == 8) {
audioformat = new AudioFormat(Encoding.PCM_UNSIGNED,
samplerate, bits, channels, framesize, samplerate,
false, p);
} else {
audioformat = new AudioFormat(Encoding.PCM_SIGNED, samplerate,
bits, channels, framesize, samplerate, false, p);
}
} else if (subFormat.equals(SUBTYPE_IEEE_FLOAT)) {
audioformat = new AudioFormat(AudioFloatConverter.PCM_FLOAT,
samplerate, bits, channels, framesize, samplerate, false, p);
} else
throw new UnsupportedAudioFileException();
AudioFileFormat fileformat = new AudioFileFormat(
AudioFileFormat.Type.WAVE, audioformat,
AudioSystem.NOT_SPECIFIED);
return fileformat;
}
public AudioInputStream getAudioInputStream(InputStream stream)
throws UnsupportedAudioFileException, IOException {
AudioFileFormat format = getAudioFileFormat(stream);
RIFFReader riffiterator = new RIFFReader(stream);
if (!riffiterator.getFormat().equals("RIFF"))
throw new UnsupportedAudioFileException();
if (!riffiterator.getType().equals("WAVE"))
throw new UnsupportedAudioFileException();
while (riffiterator.hasNextChunk()) {
RIFFReader chunk = riffiterator.nextChunk();
if (chunk.getFormat().equals("data")) {
return new AudioInputStream(chunk, format.getFormat(), chunk
.getSize());
}
}
throw new UnsupportedAudioFileException();
}
public AudioFileFormat getAudioFileFormat(URL url)
throws UnsupportedAudioFileException, IOException {
InputStream stream = url.openStream();
AudioFileFormat format;
try {
format = getAudioFileFormat(new BufferedInputStream(stream));
} finally {
stream.close();
}
return format;
}
public AudioFileFormat getAudioFileFormat(File file)
throws UnsupportedAudioFileException, IOException {
InputStream stream = new FileInputStream(file);
AudioFileFormat format;
try {
format = getAudioFileFormat(new BufferedInputStream(stream));
} finally {
stream.close();
}
return format;
}
public AudioInputStream getAudioInputStream(URL url)
throws UnsupportedAudioFileException, IOException {
return getAudioInputStream(new BufferedInputStream(url.openStream()));
}
public AudioInputStream getAudioInputStream(File file)
throws UnsupportedAudioFileException, IOException {
return getAudioInputStream(new BufferedInputStream(new FileInputStream(
file)));
}
}