/*

 * Copyright (c) 2016, 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.

 *

 * 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.

 */

import java.io.ByteArrayInputStream;

import javax.sound.sampled.AudioFileFormat;

import javax.sound.sampled.AudioFormat;

import javax.sound.sampled.AudioInputStream;

import javax.sound.sampled.AudioSystem;

/**

 * @test

 * @bug 8132782 6729836

 */

public final class RecognizeHugeWaveFiles {

    /**

     * The maximum size in bytes per WAVE specification.

     */

    private static final /*unsigned int */ long MAX_UNSIGNED_INT = 0xffffffffL;

    /**

     * The  supported wave pcm_float format and sample size in bits.

     */

    private static final byte[][] waveTypeBits = {

            {0x0001/*WAVE_FORMAT_PCM*/,1},

            {0x0001/*WAVE_FORMAT_PCM*/,2},

            {0x0001/*WAVE_FORMAT_PCM*/,4},

            {0x0001/*WAVE_FORMAT_PCM*/,8},

            {0x0001/*WAVE_FORMAT_PCM*/,16},

            {0x0001/*WAVE_FORMAT_PCM*/,20},

            {0x0001/*WAVE_FORMAT_PCM*/,24},

            {0x0001/*WAVE_FORMAT_PCM*/,32},

            {0x0003/*WAVE_FORMAT_IEEE_FLOAT*/, 32},

            {0x0006/*WAVE_FORMAT_ALAW*/, 8},

            {0x0007/*WAVE_FORMAT_MULAW*/, 8}

    };

    /**

     * The list of supported sample rates(stored as unsigned int).

     */

    private static final int[] sampleRates = {

            8000, 11025, 16000, 22050, 32000, 37800, 44056, 44100, 47250, 48000,

            50000, 50400, 88200, 96000, 176400, 192000, 352800, 2822400,

            5644800, Integer.MAX_VALUE

    };

    /**

     * The list of supported channels (stored as unsigned int).

     */

    private static final int[] channels = {

            1, 2, 3, 4, 5, 6, 7, 8, 9, 10

    };

    /**

     * The list of supported size of data (stored as unsigned int).

     * <p>

     * The {@code MAX_UNSIGNED_INT} is a maximum size.

     */

    private static final long[] dataSizes = {

            0, 1, 2, 3, Integer.MAX_VALUE - 1, Integer.MAX_VALUE,

            (long) Integer.MAX_VALUE + 1, MAX_UNSIGNED_INT - 1, MAX_UNSIGNED_INT

    };

    public static void main(final String[] args) throws Exception {

        for (final byte[] type : waveTypeBits) {

            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.

     * <p>

     * 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.WAVE) {

            throw new RuntimeException("Error");

        }

        final long frameLength = size / format.getFrameSize();

        if (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();

            }

        }

        validateFormat(type[1], rate, channel, aff.getFormat());

    }

    /**

     * Tests the {@code AudioInputStream} fetched from the fake header.

     * <p>

     * Note that the frameLength is stored as long which means that {@code

     * AudioInputStream} must store all possible data from wave 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 (frameLength != ais.getFrameLength()) {

            System.err.println("Expected: " + frameLength);

            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.err.println("Expected: " + rate);

            System.err.println("Actual: " + format.getSampleRate());

            throw new RuntimeException();

        }

        if (format.getChannels() != channel) {

            System.err.println("Expected: " + channel);

            System.err.println("Actual: " + format.getChannels());

            throw new RuntimeException();

        }

        int frameSize = ((bits + 7) / 8) * channel;

        if (format.getFrameSize() != frameSize) {

            System.err.println("Expected: " + frameSize);

            System.err.println("Actual: " + format.getFrameSize());

            throw new RuntimeException();

        }

    }

    /**

     * Creates the custom header of the WAVE 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) {

        final int frameSize = ((type[1] + 7) / 8) * channel;

        return new byte[]{

                // RIFF_MAGIC

                0x52, 0x49, 0x46, 0x46,

                // fileLength

                -1, -1, -1, -1,

                //  waveMagic

                0x57, 0x41, 0x56, 0x45,

                // FMT_MAGIC

                0x66, 0x6d, 0x74, 0x20,

                // size

                16, 0, 0, 0,

                // wav_type  WAVE_FORMAT_IEEE_FLOAT

                type[0], 0,

                // channels

                (byte) (channel), (byte) (channel >> 8),

                // samplerate

                (byte) (rate), (byte) (rate >> 8), (byte) (rate >> 16),

                (byte) (rate >> 24),

                // framerate

                1, 0, 0, 0,

                // framesize

                (byte) (frameSize), (byte) (frameSize >> 8),

                // bits

                type[1], 0,

                // DATA_MAGIC

                0x64, 0x61, 0x74, 0x61,

                // data size

                (byte) (size), (byte) (size >> 8), (byte) (size >> 16),

                (byte) (size >> 24)

                // data

                , 0, 0, 0, 0, 0

        };

    }

}