001    /**
002     * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portlet.documentlibrary.util;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    
020    import com.xuggle.xuggler.IAudioResampler;
021    import com.xuggle.xuggler.IAudioSamples;
022    import com.xuggle.xuggler.ICodec;
023    import com.xuggle.xuggler.IContainer;
024    import com.xuggle.xuggler.IPacket;
025    import com.xuggle.xuggler.IStream;
026    import com.xuggle.xuggler.IStreamCoder;
027    
028    /**
029     * @author Juan González
030     * @author Sergio González
031     * @author Brian Wing Shun Chan
032     */
033    public class LiferayAudioConverter extends LiferayConverter {
034    
035            public LiferayAudioConverter(String inputURL, String outputURL) {
036                    _inputURL = inputURL;
037                    _outputURL = outputURL;
038            }
039    
040            @Override
041            public void convert() throws Exception {
042                    try {
043                            doConvert();
044                    }
045                    finally {
046                            if (_inputIContainer.isOpened()) {
047                                    _inputIContainer.close();
048                            }
049    
050                            if (_outputIContainer.isOpened()) {
051                                    _outputIContainer.close();
052                            }
053                    }
054            }
055    
056            protected void doConvert() throws Exception {
057                    _inputIContainer = IContainer.make();
058                    _outputIContainer = IContainer.make();
059    
060                    openContainer(_inputIContainer, _inputURL, false);
061                    openContainer(_outputIContainer, _outputURL, true);
062    
063                    int inputStreamsCount = _inputIContainer.getNumStreams();
064    
065                    if (inputStreamsCount < 0) {
066                            throw new RuntimeException("Input URL does not have any streams");
067                    }
068    
069                    IAudioResampler[] iAudioResamplers =
070                            new IAudioResampler[inputStreamsCount];
071    
072                    IAudioSamples[] inputIAudioSamples =
073                            new IAudioSamples[inputStreamsCount];
074                    IAudioSamples[] outputIAudioSamples =
075                            new IAudioSamples[inputStreamsCount];
076    
077                    IStream[] outputIStreams = new IStream[inputStreamsCount];
078    
079                    IStreamCoder[] inputIStreamCoders = new IStreamCoder[inputStreamsCount];
080                    IStreamCoder[] outputIStreamCoders =
081                            new IStreamCoder[inputStreamsCount];
082    
083                    for (int i = 0; i < inputStreamsCount; i++) {
084                            IStream inputIStream = _inputIContainer.getStream(i);
085    
086                            IStreamCoder inputIStreamCoder = inputIStream.getStreamCoder();
087    
088                            inputIStreamCoders[i] = inputIStreamCoder;
089    
090                            ICodec.Type inputICodecType = inputIStreamCoder.getCodecType();
091    
092                            if (inputICodecType == ICodec.Type.CODEC_TYPE_AUDIO) {
093                                    prepareAudio(
094                                            iAudioResamplers, inputIAudioSamples, outputIAudioSamples,
095                                            inputIStreamCoder, outputIStreamCoders, _outputIContainer,
096                                            outputIStreams, inputICodecType, _outputURL, i);
097                            }
098    
099                            openStreamCoder(inputIStreamCoders[i]);
100                            openStreamCoder(outputIStreamCoders[i]);
101                    }
102    
103                    if (_outputIContainer.writeHeader() < 0) {
104                            throw new RuntimeException("Unable to write container header");
105                    }
106    
107                    IPacket inputIPacket = IPacket.make();
108                    IPacket outputIPacket = IPacket.make();
109    
110                    int previousPacketSize = -1;
111    
112                    _inputIContainer.readNextPacket(inputIPacket);
113    
114                    while (_inputIContainer.readNextPacket(inputIPacket) == 0) {
115                            if (_log.isDebugEnabled()) {
116                                    _log.debug("Current packet size " + inputIPacket.getSize());
117                            }
118    
119                            int streamIndex = inputIPacket.getStreamIndex();
120    
121                            IStreamCoder inputIStreamCoder = inputIStreamCoders[streamIndex];
122                            IStreamCoder outputIStreamCoder = outputIStreamCoders[streamIndex];
123    
124                            if (outputIStreamCoder == null) {
125                                    continue;
126                            }
127    
128                            if (inputIStreamCoder.getCodecType() ==
129                                            ICodec.Type.CODEC_TYPE_AUDIO) {
130    
131                                    IStream iStream = _inputIContainer.getStream(streamIndex);
132    
133                                    long timeStampOffset = getStreamTimeStampOffset(iStream);
134    
135                                    decodeAudio(
136                                            iAudioResamplers[streamIndex],
137                                            inputIAudioSamples[streamIndex],
138                                            outputIAudioSamples[streamIndex], inputIPacket,
139                                            outputIPacket, inputIStreamCoder, outputIStreamCoder,
140                                            _outputIContainer, inputIPacket.getSize(),
141                                            previousPacketSize, streamIndex, timeStampOffset);
142                            }
143    
144                            previousPacketSize = inputIPacket.getSize();
145                    }
146    
147                    flush(outputIStreamCoders, _outputIContainer);
148    
149                    if (_outputIContainer.writeTrailer() < 0) {
150                            throw new RuntimeException(
151                                    "Unable to write trailer to output file");
152                    }
153    
154                    cleanUp(iAudioResamplers, null);
155                    cleanUp(inputIAudioSamples, outputIAudioSamples);
156                    cleanUp(inputIStreamCoders, outputIStreamCoders);
157                    cleanUp(inputIPacket, outputIPacket);
158            }
159    
160            @Override
161            protected IContainer getInputIContainer() {
162                    return _inputIContainer;
163            }
164    
165            private static Log _log = LogFactoryUtil.getLog(
166                    LiferayAudioConverter.class);
167    
168            private IContainer _inputIContainer;
169            private String _inputURL;
170            private IContainer _outputIContainer;
171            private String _outputURL;
172    
173    }