e1910fdff2
Previously, a discontinuity occurred when looping an OGG/Vorbis stream, this happens due to a bug in J-Ogg library. To work around this issue, we load the logical ogg stream and vorbis stream from scratch based on the already loaded existing OGG pages instead of using the buggy setTime(0) call.
301 lines
11 KiB
Java
301 lines
11 KiB
Java
/*
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* Copyright (c) 2009-2012 jMonkeyEngine
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.jme3.audio.plugins;
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import com.jme3.asset.AssetInfo;
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import com.jme3.asset.AssetLoader;
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import com.jme3.audio.AudioBuffer;
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import com.jme3.audio.AudioData;
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import com.jme3.audio.AudioKey;
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import com.jme3.audio.AudioStream;
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import com.jme3.audio.SeekableStream;
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import com.jme3.util.BufferUtils;
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import de.jarnbjo.ogg.EndOfOggStreamException;
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import de.jarnbjo.ogg.LogicalOggStream;
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import de.jarnbjo.ogg.PhysicalOggStream;
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import de.jarnbjo.vorbis.IdentificationHeader;
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import de.jarnbjo.vorbis.VorbisStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.ByteBuffer;
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import java.util.Collection;
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public class OGGLoader implements AssetLoader {
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// private static int BLOCK_SIZE = 4096*64;
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private PhysicalOggStream oggStream;
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private LogicalOggStream loStream;
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private VorbisStream vorbisStream;
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// private CommentHeader commentHdr;
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private IdentificationHeader streamHdr;
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private static class JOggInputStream extends InputStream {
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private boolean endOfStream = false;
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protected PhysicalOggStream ps;
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protected LogicalOggStream ls;
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protected VorbisStream vs;
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public JOggInputStream(PhysicalOggStream ps, LogicalOggStream ls, VorbisStream vs){
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this.ps = ps;
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this.ls = ls;
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this.vs = vs;
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}
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@Override
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public int read() throws IOException {
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return 0;
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}
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@Override
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public int read(byte[] buf) throws IOException{
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return read(buf,0,buf.length);
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}
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@Override
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public int read(byte[] buf, int offset, int length) throws IOException {
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if (endOfStream) {
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return -1;
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}
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int bytesRead = 0, cnt = 0;
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assert length % 2 == 0; // read buffer should be even
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while (bytesRead < length) {
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if ((cnt = vs.readPcm(buf, offset + bytesRead, length - bytesRead)) <= 0) {
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System.out.println("Read " + cnt + " bytes");
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System.out.println("offset " + offset);
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System.out.println("bytesRead " + bytesRead);
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System.out.println("buf length " + length);
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for (int i = 0; i < bytesRead; i++) {
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System.out.print(buf[i]);
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}
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System.out.println("");
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System.out.println("EOS");
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endOfStream = true;
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break;
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}
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bytesRead += cnt;
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}
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swapBytes(buf, offset, bytesRead);
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return bytesRead;
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}
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@Override
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public void close() throws IOException{
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vs.close();
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}
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}
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private static class SeekableJOggInputStream extends JOggInputStream implements SeekableStream {
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public SeekableJOggInputStream(PhysicalOggStream ps, LogicalOggStream ls, VorbisStream vs){
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super(ps, ls, vs);
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}
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public void setTime(float time) {
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if (time != 0.0) {
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throw new UnsupportedOperationException("OGG/Vorbis seeking only supported for time = 0");
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}
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try {
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// HACK: Reload the logical and vorbis streams from scratch
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// based on the existing ogg page data.
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// This fixes an audio discontinuity issue when looping
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// an streaming OGG file via setTime(0).
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ls = ((CachedOggStream) ps).reloadLogicalOggStream();
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vs = new VorbisStream(ls);
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} catch (IOException ex) {
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ex.printStackTrace();
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}
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}
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}
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/**
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* Returns the total of expected OGG bytes.
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*
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* @param dataBytesTotal The number of bytes in the input
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* @return If the computed number of bytes is less than the number
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* of bytes in the input, it is returned, otherwise the number
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* of bytes in the input is returned.
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*/
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private int getOggTotalBytes(int dataBytesTotal){
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// Vorbis stream could have more samples than than the duration of the sound
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// Must truncate.
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int numSamples;
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if (oggStream instanceof CachedOggStream){
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CachedOggStream cachedOggStream = (CachedOggStream) oggStream;
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numSamples = (int) cachedOggStream.getLastOggPage().getAbsoluteGranulePosition();
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}else{
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UncachedOggStream uncachedOggStream = (UncachedOggStream) oggStream;
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numSamples = (int) uncachedOggStream.getLastOggPage().getAbsoluteGranulePosition();
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}
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// Number of Samples * Number of Channels * Bytes Per Sample
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int totalBytes = numSamples * streamHdr.getChannels() * 2;
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// System.out.println("Sample Rate: " + streamHdr.getSampleRate());
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// System.out.println("Channels: " + streamHdr.getChannels());
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// System.out.println("Stream Length: " + numSamples);
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// System.out.println("Bytes Calculated: " + totalBytes);
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// System.out.println("Bytes Available: " + dataBytes.length);
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// Take the minimum of the number of bytes available
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// and the expected duration of the audio.
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return Math.min(totalBytes, dataBytesTotal);
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}
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private float computeStreamDuration(){
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// for uncached stream sources, the granule position is not known.
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if (oggStream instanceof UncachedOggStream)
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return -1;
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// 2 bytes(16bit) * channels * sampleRate
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int bytesPerSec = 2 * streamHdr.getChannels() * streamHdr.getSampleRate();
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// Don't know how many bytes are in input, pass MAX_VALUE
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int totalBytes = getOggTotalBytes(Integer.MAX_VALUE);
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return (float)totalBytes / bytesPerSec;
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}
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private ByteBuffer readToBuffer() throws IOException{
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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byte[] buf = new byte[512];
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int read = 0;
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try {
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while ( (read = vorbisStream.readPcm(buf, 0, buf.length)) > 0){
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baos.write(buf, 0, read);
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}
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} catch (EndOfOggStreamException ex){
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}
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byte[] dataBytes = baos.toByteArray();
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swapBytes(dataBytes, 0, dataBytes.length);
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int bytesToCopy = getOggTotalBytes( dataBytes.length );
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ByteBuffer data = BufferUtils.createByteBuffer(bytesToCopy);
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data.put(dataBytes, 0, bytesToCopy).flip();
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vorbisStream.close();
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loStream.close();
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oggStream.close();
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return data;
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}
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private static void swapBytes(byte[] b, int off, int len) {
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byte tempByte;
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for (int i = off; i < (off+len); i+=2) {
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tempByte = b[i];
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b[i] = b[i+1];
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b[i+1] = tempByte;
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}
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}
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private InputStream readToStream(boolean seekable) {
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if (seekable) {
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return new SeekableJOggInputStream(oggStream, loStream, vorbisStream);
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} else {
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return new JOggInputStream(oggStream, loStream, vorbisStream);
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}
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}
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private AudioData load(InputStream in, boolean readStream, boolean streamCache) throws IOException{
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if (readStream && streamCache){
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oggStream = new CachedOggStream(in);
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}else{
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oggStream = new UncachedOggStream(in);
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}
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Collection<LogicalOggStream> streams = oggStream.getLogicalStreams();
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loStream = streams.iterator().next();
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// if (loStream == null){
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// throw new IOException("OGG File does not contain vorbis audio stream");
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// }
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vorbisStream = new VorbisStream(loStream);
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streamHdr = vorbisStream.getIdentificationHeader();
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// commentHdr = vorbisStream.getCommentHeader();
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if (!readStream){
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AudioBuffer audioBuffer = new AudioBuffer();
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audioBuffer.setupFormat(streamHdr.getChannels(), 16, streamHdr.getSampleRate());
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audioBuffer.updateData(readToBuffer());
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return audioBuffer;
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}else{
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AudioStream audioStream = new AudioStream();
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audioStream.setupFormat(streamHdr.getChannels(), 16, streamHdr.getSampleRate());
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// might return -1 if unknown
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float streamDuration = computeStreamDuration();
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audioStream.updateData(readToStream(oggStream.isSeekable()), streamDuration);
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return audioStream;
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}
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}
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public Object load(AssetInfo info) throws IOException {
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if (!(info.getKey() instanceof AudioKey)){
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throw new IllegalArgumentException("Audio assets must be loaded using an AudioKey");
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}
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AudioKey key = (AudioKey) info.getKey();
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boolean readStream = key.isStream();
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boolean streamCache = key.useStreamCache();
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InputStream in = null;
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try {
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in = info.openStream();
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return load(in, readStream, streamCache);
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} finally {
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if (in != null){
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in.close();
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}
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}
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}
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}
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