author | serb |
Tue, 28 Jul 2015 22:31:54 +0300 | |
changeset 32121 | 93ad23865c9e |
parent 25859 | 3317bb8137f4 |
child 35656 | e5582272e65b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.media.sound; |
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import java.io.DataInputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import javax.sound.sampled.AudioFileFormat; |
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import javax.sound.sampled.AudioFormat; |
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import javax.sound.sampled.AudioSystem; |
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import javax.sound.sampled.UnsupportedAudioFileException; |
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/** |
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* AU file reader. |
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* |
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* @author Kara Kytle |
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* @author Jan Borgersen |
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* @author Florian Bomers |
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*/ |
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public final class AuFileReader extends SunFileReader { |
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@Override |
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public AudioFileFormat getAudioFileFormatImpl(final InputStream stream) |
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throws UnsupportedAudioFileException, IOException { |
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boolean bigendian = false; |
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int headerSize = -1; |
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int dataSize = -1; |
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int encoding_local = -1; |
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int sampleRate = -1; |
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int frameRate = -1; |
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int frameSize = -1; |
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int channels = -1; |
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final int sampleSizeInBits; |
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int length = 0; |
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int nread = 0; |
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AudioFormat.Encoding encoding = null; |
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DataInputStream dis = new DataInputStream( stream ); |
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final int magic = dis.readInt(); nread += 4; |
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if (! (magic == AuFileFormat.AU_SUN_MAGIC) || (magic == AuFileFormat.AU_DEC_MAGIC) || |
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(magic == AuFileFormat.AU_SUN_INV_MAGIC) || (magic == AuFileFormat.AU_DEC_INV_MAGIC) ) { |
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// not AU, throw exception |
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throw new UnsupportedAudioFileException("not an AU file"); |
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} |
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if ((magic == AuFileFormat.AU_SUN_MAGIC) || (magic == AuFileFormat.AU_DEC_MAGIC)) { |
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bigendian = true; // otherwise little-endian |
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} |
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headerSize = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; |
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dataSize = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; |
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encoding_local = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; |
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sampleRate = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; |
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channels = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; |
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if (channels <= 0) { |
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throw new UnsupportedAudioFileException("Invalid number of channels"); |
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} |
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frameRate = sampleRate; |
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switch (encoding_local) { |
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case AuFileFormat.AU_ULAW_8: |
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encoding = AudioFormat.Encoding.ULAW; |
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sampleSizeInBits = 8; |
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break; |
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case AuFileFormat.AU_ALAW_8: |
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encoding = AudioFormat.Encoding.ALAW; |
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sampleSizeInBits = 8; |
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break; |
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case AuFileFormat.AU_LINEAR_8: |
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// $$jb: 04.29.99: 8bit linear is *signed*, not *unsigned* |
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encoding = AudioFormat.Encoding.PCM_SIGNED; |
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sampleSizeInBits = 8; |
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break; |
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case AuFileFormat.AU_LINEAR_16: |
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encoding = AudioFormat.Encoding.PCM_SIGNED; |
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sampleSizeInBits = 16; |
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break; |
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case AuFileFormat.AU_LINEAR_24: |
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encoding = AudioFormat.Encoding.PCM_SIGNED; |
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sampleSizeInBits = 24; |
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break; |
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case AuFileFormat.AU_LINEAR_32: |
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encoding = AudioFormat.Encoding.PCM_SIGNED; |
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sampleSizeInBits = 32; |
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break; |
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// $jb: 03.19.99: we don't support these ... |
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/* case AuFileFormat.AU_FLOAT: |
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encoding = new AudioFormat.FLOAT; |
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sampleSizeInBits = 32; |
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break; |
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case AuFileFormat.AU_DOUBLE: |
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encoding = new AudioFormat.DOUBLE; |
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sampleSizeInBits = 8; |
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break; |
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case AuFileFormat.AU_ADPCM_G721: |
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encoding = new AudioFormat.G721_ADPCM; |
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sampleSizeInBits = 16; |
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break; |
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case AuFileFormat.AU_ADPCM_G723_3: |
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encoding = new AudioFormat.G723_3; |
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sampleSize = 24; |
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SamplePerUnit = 8; |
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break; |
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case AuFileFormat.AU_ADPCM_G723_5: |
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encoding = new AudioFormat.G723_5; |
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sampleSize = 40; |
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SamplePerUnit = 8; |
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break; |
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*/ |
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default: |
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// unsupported filetype, throw exception |
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throw new UnsupportedAudioFileException("not a valid AU file"); |
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} |
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frameSize = calculatePCMFrameSize(sampleSizeInBits, channels); |
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//$$fb 2002-11-02: fix for 4629669: AU file reader: problems with empty files |
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if( dataSize < 0 ) { |
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length = AudioSystem.NOT_SPECIFIED; |
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} else { |
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//$$fb 2003-10-20: fix for 4940459: AudioInputStream.getFrameLength() returns 0 instead of NOT_SPECIFIED |
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length = dataSize / frameSize; |
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} |
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// now seek past the header |
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dis.skipBytes(headerSize - nread); |
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AudioFormat format = new AudioFormat(encoding, sampleRate, |
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sampleSizeInBits, channels, |
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frameSize, (float) frameRate, |
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bigendian); |
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return new AuFileFormat(AudioFileFormat.Type.AU, dataSize + headerSize, |
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format, length); |
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} |
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} |