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package com.sun.media.sound;

import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;

import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioFormat.Encoding;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.UnsupportedAudioFileException;

WAVE file reader for files using format WAVE_FORMAT_EXTENSIBLE (0xFFFE).
Author:Karl Helgason
/** * WAVE file reader for files using format WAVE_FORMAT_EXTENSIBLE (0xFFFE). * * @author Karl Helgason */
public final class WaveExtensibleFileReader extends SunFileReader { private static final class GUID { private long i1; private int s1; private int s2; private int x1; private int x2; private int x3; private int x4; private int x5; private int x6; private int x7; private int x8; private GUID() { } 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; } @Override public int hashCode() { return (int) i1; } @Override 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 final String[] channelnames = { "FL", "FR", "FC", "LF", "BL", "BR", // 5.1 "FLC", "FLR", "BC", "SL", "SR", "TC", "TFL", "TFC", "TFR", "TBL", "TBC", "TBR" }; private static final 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 final GUID SUBTYPE_PCM = new GUID(0x00000001, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71); private static final GUID SUBTYPE_IEEE_FLOAT = new GUID(0x00000003, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71); private static String decodeChannelMask(long channelmask) { StringBuilder sb = new StringBuilder(); long m = 1; for (int i = 0; i < allchannelnames.length; i++) { if ((channelmask & m) != 0L) { if (i < channelnames.length) { sb.append(channelnames[i]).append(' '); } else { sb.append(allchannelnames[i]).append(' '); } } m *= 2L; } if (sb.length() == 0) return null; return sb.substring(0, sb.length() - 1); } @Override StandardFileFormat getAudioFileFormatImpl(final 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; long dataSize = 0; 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 != WaveFileFormat.WAVE_FORMAT_EXTENSIBLE) { throw new UnsupportedAudioFileException(); } 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")) { dataSize = chunk.getSize(); data_found = true; break; } } if (!fmt_found || !data_found) { throw new UnsupportedAudioFileException(); } Map<String, Object> p = new HashMap<>(); 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(Encoding.PCM_FLOAT, samplerate, bits, channels, framesize, samplerate, false, p); } else { throw new UnsupportedAudioFileException(); } return new StandardFileFormat(AudioFileFormat.Type.WAVE, audioformat, dataSize / audioformat.getFrameSize()); } @Override public AudioInputStream getAudioInputStream(final InputStream stream) throws UnsupportedAudioFileException, IOException { final StandardFileFormat format = getAudioFileFormat(stream); final AudioFormat af = format.getFormat(); final long length = format.getLongFrameLength(); // we've got everything, the stream is supported and it is at the // beginning of the header, so find the data chunk again and return an // AudioInputStream final RIFFReader riffiterator = new RIFFReader(stream); while (riffiterator.hasNextChunk()) { RIFFReader chunk = riffiterator.nextChunk(); if (chunk.getFormat().equals("data")) { return new AudioInputStream(chunk, af, length); } } throw new UnsupportedAudioFileException(); } }