/*

 * 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 java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.IOException;

import java.io.InputStream;

import java.util.ArrayList;

import java.util.List;

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.spi.AudioFileWriter;

import javax.sound.sampled.spi.FormatConversionProvider;

import static java.util.ServiceLoader.load;

import static javax.sound.sampled.AudioFileFormat.Type.AIFC;

import static javax.sound.sampled.AudioFileFormat.Type.AIFF;

import static javax.sound.sampled.AudioFileFormat.Type.AU;

import static javax.sound.sampled.AudioFileFormat.Type.SND;

import static javax.sound.sampled.AudioFileFormat.Type.WAVE;

import static javax.sound.sampled.AudioSystem.NOT_SPECIFIED;

/**

 * @test

 * @bug 8038139

 */

public final class FrameLengthAfterConversion {

    /**

     * We will try to use all formats, in this case all our providers will be

     * covered by supported/unsupported formats.

     */

    private static final List<AudioFormat> formats = new ArrayList<>(23000);

    private static final AudioFormat.Encoding[] encodings = {

            AudioFormat.Encoding.ALAW, AudioFormat.Encoding.ULAW,

            AudioFormat.Encoding.PCM_SIGNED, AudioFormat.Encoding.PCM_UNSIGNED,

            AudioFormat.Encoding.PCM_FLOAT, new AudioFormat.Encoding("Test")

    };

    private static final int[] sampleBits = {

            1, 4, 8, 11, 16, 20, 24, 32

    };

    private static final int[] channels = {

            1, 2, 3, 4, 5

    };

    private static final AudioFileFormat.Type[] types = {

            WAVE, AU, AIFF, AIFC, SND,

            new AudioFileFormat.Type("TestName", "TestExt")

    };

    private static final int FRAME_LENGTH = 10;

    static {

        for (final int sampleSize : sampleBits) {

            for (final int channel : channels) {

                for (final AudioFormat.Encoding enc : encodings) {

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

                    formats.add(new AudioFormat(enc, 44100, sampleSize, channel,

                                                frameSize, 44100, true));

                    formats.add(new AudioFormat(enc, 44100, sampleSize, channel,

                                                frameSize, 44100, false));

                }

            }

        }

    }

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

        for (final FormatConversionProvider fcp : load(

                FormatConversionProvider.class)) {

            System.out.println("fcp = " + fcp);

            for (final AudioFormat from : formats) {

                for (final AudioFormat to : formats) {

                    testAfterConversion(fcp, to, getStream(from, true));

                }

            }

        }

        for (final AudioFileWriter afw : load(AudioFileWriter.class)) {

            System.out.println("afw = " + afw);

            for (final AudioFileFormat.Type type : types) {

                for (final AudioFormat from : formats) {

                    testAfterSaveToStream(afw, type, getStream(from, true));

                }

            }

        }

        for (final AudioFileWriter afw : load(AudioFileWriter.class)) {

            System.out.println("afw = " + afw);

            for (final AudioFileFormat.Type type : types) {

                for (final AudioFormat from : formats) {

                    testAfterSaveToFile(afw, type, getStream(from, true));

                }

            }

        }

        for (final AudioFileWriter afw : load(AudioFileWriter.class)) {

            System.out.println("afw = " + afw);

            for (final AudioFileFormat.Type type : types) {

                for (final AudioFormat from : formats) {

                    testAfterSaveToFile(afw, type, getStream(from, false));

                }

            }

        }

    }

    /**

     * Verifies the frame length after the stream was saved/read to/from

     * stream.

     */

    private static void testAfterSaveToStream(final AudioFileWriter afw,

                                              final AudioFileFormat.Type type,

                                              final AudioInputStream ais) {

        try {

            final ByteArrayOutputStream out = new ByteArrayOutputStream();

            afw.write(ais, type, out);

            final InputStream input = new ByteArrayInputStream(

                    out.toByteArray());

            validate(AudioSystem.getAudioInputStream(input).getFrameLength());

        } catch (IllegalArgumentException | UnsupportedAudioFileException

                | IOException ignored) {

        }

    }

    /**

     * Verifies the frame length after the stream was saved/read to/from file.

     */

    private static void testAfterSaveToFile(final AudioFileWriter afw,

                                            final AudioFileFormat.Type type,

                                            AudioInputStream ais) {

        try {

            final File temp = File.createTempFile("sound", ".tmp");

            temp.deleteOnExit();

            afw.write(ais, type, temp);

            ais = AudioSystem.getAudioInputStream(temp);

            final long frameLength = ais.getFrameLength();

            ais.close();

            temp.delete();

            validate(frameLength);

        } catch (IllegalArgumentException | UnsupportedAudioFileException

                | IOException ignored) {

        }

    }

    /**

     * Verifies the frame length after the stream was converted to other

     * stream.

     *

     * @see FormatConversionProvider#getAudioInputStream(AudioFormat,

     * AudioInputStream)

     */

    private static void testAfterConversion(final FormatConversionProvider fcp,

                                            final AudioFormat to,

                                            final AudioInputStream ais) {

        if (fcp.isConversionSupported(to, ais.getFormat())) {

            validate(fcp.getAudioInputStream(to, ais).getFrameLength());

        }

    }

    /**

     * Throws an exception if the frameLength is specified and is not equal to

     * the gold value.

     */

    private static void validate(final long frameLength) {

        if (frameLength != FRAME_LENGTH) {

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

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

            throw new RuntimeException();

        }

    }

    private static AudioInputStream getStream(final AudioFormat format,

                                              final boolean frameLength) {

        final int dataSize = FRAME_LENGTH * format.getFrameSize();

        final InputStream in = new ByteArrayInputStream(new byte[dataSize]);

        if (frameLength) {

            return new AudioInputStream(in, format, FRAME_LENGTH);

        } else {

            return new AudioInputStream(in, format, NOT_SPECIFIED);

        }

    }

}