+ * The {@code MAX_UNSIGNED_INT} used if the size in bytes is unknown. + */ + private static final long[] dataSizes = { + 0, 1, 2, 3, Integer.MAX_VALUE - AU_HEADER, Integer.MAX_VALUE - 1, + Integer.MAX_VALUE, (long) Integer.MAX_VALUE + 1, + (long) Integer.MAX_VALUE + AU_HEADER, MAX_UNSIGNED_INT - AU_HEADER, + MAX_UNSIGNED_INT - 1, MAX_UNSIGNED_INT + }; + + public static void main(final String[] args) throws Exception { + for (final byte[] type : auTypeBits) { + for (final int sampleRate : sampleRates) { + for (final int channel : channels) { + for (final long dataSize : dataSizes) { + testAFF(type, sampleRate, channel, dataSize); + testAIS(type, sampleRate, channel, dataSize); + } + } + } + } + } + + /** + * Tests the {@code AudioFileFormat} fetched from the fake header. + *
+ * Note that the frameLength and byteLength are stored as int which means + * that {@code AudioFileFormat} will store the data above {@code MAX_INT} + * as NOT_SPECIFIED. + */ + private static void testAFF(final byte[] type, final int rate, + final int channel, final long size) + throws Exception { + final byte[] header = createHeader(type, rate, channel, size); + final ByteArrayInputStream fake = new ByteArrayInputStream(header); + final AudioFileFormat aff = AudioSystem.getAudioFileFormat(fake); + final AudioFormat format = aff.getFormat(); + + if (aff.getType() != AudioFileFormat.Type.AU) { + throw new RuntimeException("Error"); + } + + final long frameLength = size / format.getFrameSize(); + if (size != MAX_UNSIGNED_INT && frameLength <= Integer.MAX_VALUE) { + if (aff.getFrameLength() != frameLength) { + System.err.println("Expected: " + frameLength); + System.err.println("Actual: " + aff.getFrameLength()); + throw new RuntimeException(); + } + } else { + if (aff.getFrameLength() != AudioSystem.NOT_SPECIFIED) { + System.err.println("Expected: " + AudioSystem.NOT_SPECIFIED); + System.err.println("Actual: " + aff.getFrameLength()); + throw new RuntimeException(); + } + } + + final long byteLength = size + AU_HEADER; + if (byteLength <= Integer.MAX_VALUE) { + if (aff.getByteLength() != byteLength) { + System.err.println("Expected: " + byteLength); + System.err.println("Actual: " + aff.getByteLength()); + throw new RuntimeException(); + } + } else { + if (aff.getByteLength() != AudioSystem.NOT_SPECIFIED) { + System.err.println("Expected: " + AudioSystem.NOT_SPECIFIED); + System.err.println("Actual: " + aff.getByteLength()); + throw new RuntimeException(); + } + } + validateFormat(type[1], rate, channel, aff.getFormat()); + } + + /** + * Tests the {@code AudioInputStream} fetched from the fake header. + *
+ * Note that the frameLength is stored as long which means + * that {@code AudioInputStream} must store all possible data from au file. + */ + private static void testAIS(final byte[] type, final int rate, + final int channel, final long size) + throws Exception { + final byte[] header = createHeader(type, rate, channel, size); + final ByteArrayInputStream fake = new ByteArrayInputStream(header); + final AudioInputStream ais = AudioSystem.getAudioInputStream(fake); + final AudioFormat format = ais.getFormat(); + final long frameLength = size / format.getFrameSize(); + if (size != MAX_UNSIGNED_INT) { + if (frameLength != ais.getFrameLength()) { + System.err.println("Expected: " + frameLength); + System.err.println("Actual: " + ais.getFrameLength()); + throw new RuntimeException(); + } + } else { + if (ais.getFrameLength() != AudioSystem.NOT_SPECIFIED) { + System.err.println("Expected: " + AudioSystem.NOT_SPECIFIED); + System.err.println("Actual: " + ais.getFrameLength()); + throw new RuntimeException(); + } + } + if (ais.available() < 0) { + System.err.println("available should be >=0: " + ais.available()); + throw new RuntimeException(); + } + validateFormat(type[1], rate, channel, format); + } + + /** + * Tests that format contains the same data as were provided to the fake + * stream. + */ + private static void validateFormat(final byte bits, final int rate, + final int channel, + final AudioFormat format) { + + if (Float.compare(format.getSampleRate(), rate) != 0) { + System.out.println("Expected: " + rate); + System.out.println("Actual: " + format.getSampleRate()); + throw new RuntimeException(); + } + if (format.getChannels() != channel) { + System.out.println("Expected: " + channel); + System.out.println("Actual: " + format.getChannels()); + throw new RuntimeException(); + } + int frameSize = ((bits + 7) / 8) * channel; + if (format.getFrameSize() != frameSize) { + System.out.println("Expected: " + frameSize); + System.out.println("Actual: " + format.getFrameSize()); + throw new RuntimeException(); + } + } + + /** + * Creates the custom header of the AU file. It is expected that all passed + * data are supported. + */ + private static byte[] createHeader(final byte[] type, final int rate, + final int channel, final long size) { + return new byte[]{ + // AU_SUN_MAGIC + 0x2e, 0x73, 0x6e, 0x64, + // headerSize + 0, 0, 0, AU_HEADER, + // dataSize + (byte) (size >> 24), (byte) (size >> 16), (byte) (size >> 8), + (byte) size, + // encoding + 0, 0, 0, type[0], + // sampleRate + (byte) (rate >> 24), (byte) (rate >> 16), (byte) (rate >> 8), + (byte) (rate), + // channels + (byte) (channel >> 24), (byte) (channel >> 16), + (byte) (channel >> 8), (byte) (channel), + // data + 0, 0, 0, 0, 0, 0 + }; + } +}