| /* |
| * Copyright (c) 1999, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| package com.sun.media.sound; |
| |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import javax.sound.sampled.AudioFileFormat.Type; |
| import javax.sound.sampled.AudioFormat; |
| import javax.sound.sampled.AudioSystem; |
| import javax.sound.sampled.UnsupportedAudioFileException; |
| |
| /** |
| * AU file reader. |
| * |
| * @author Kara Kytle |
| * @author Jan Borgersen |
| * @author Florian Bomers |
| */ |
| public final class AuFileReader extends SunFileReader { |
| |
| @Override |
| StandardFileFormat getAudioFileFormatImpl(final InputStream stream) |
| throws UnsupportedAudioFileException, IOException { |
| final DataInputStream dis = new DataInputStream(stream); |
| final int magic = dis.readInt(); |
| |
| if (magic != AuFileFormat.AU_SUN_MAGIC) { |
| // not AU, throw exception |
| throw new UnsupportedAudioFileException("not an AU file"); |
| } |
| |
| final int headerSize = dis.readInt(); |
| if (headerSize < AuFileFormat.AU_HEADERSIZE) { |
| throw new UnsupportedAudioFileException("Invalid header size"); |
| } |
| final long /* unsigned int */ dataSize = dis.readInt() & 0xffffffffL; |
| final int auType = dis.readInt(); |
| final int sampleRate = dis.readInt(); |
| if (sampleRate <= 0) { |
| throw new UnsupportedAudioFileException("Invalid sample rate"); |
| } |
| final int channels = dis.readInt(); |
| if (channels <= 0) { |
| throw new UnsupportedAudioFileException("Invalid number of channels"); |
| } |
| |
| final int sampleSizeInBits; |
| final AudioFormat.Encoding encoding; |
| switch (auType) { |
| case AuFileFormat.AU_ULAW_8: |
| encoding = AudioFormat.Encoding.ULAW; |
| sampleSizeInBits = 8; |
| break; |
| case AuFileFormat.AU_ALAW_8: |
| encoding = AudioFormat.Encoding.ALAW; |
| sampleSizeInBits = 8; |
| break; |
| case AuFileFormat.AU_LINEAR_8: |
| // $$jb: 04.29.99: 8bit linear is *signed*, not *unsigned* |
| encoding = AudioFormat.Encoding.PCM_SIGNED; |
| sampleSizeInBits = 8; |
| break; |
| case AuFileFormat.AU_LINEAR_16: |
| encoding = AudioFormat.Encoding.PCM_SIGNED; |
| sampleSizeInBits = 16; |
| break; |
| case AuFileFormat.AU_LINEAR_24: |
| encoding = AudioFormat.Encoding.PCM_SIGNED; |
| sampleSizeInBits = 24; |
| break; |
| case AuFileFormat.AU_LINEAR_32: |
| encoding = AudioFormat.Encoding.PCM_SIGNED; |
| sampleSizeInBits = 32; |
| break; |
| case AuFileFormat.AU_FLOAT: |
| encoding = AudioFormat.Encoding.PCM_FLOAT; |
| sampleSizeInBits = 32; |
| break; |
| // we don't support these ... |
| /* case AuFileFormat.AU_DOUBLE: |
| encoding = new AudioFormat.DOUBLE; |
| sampleSizeInBits = 8; |
| break; |
| case AuFileFormat.AU_ADPCM_G721: |
| encoding = new AudioFormat.G721_ADPCM; |
| sampleSizeInBits = 16; |
| break; |
| case AuFileFormat.AU_ADPCM_G723_3: |
| encoding = new AudioFormat.G723_3; |
| sampleSize = 24; |
| SamplePerUnit = 8; |
| break; |
| case AuFileFormat.AU_ADPCM_G723_5: |
| encoding = new AudioFormat.G723_5; |
| sampleSize = 40; |
| SamplePerUnit = 8; |
| break; |
| */ |
| default: |
| // unsupported filetype, throw exception |
| throw new UnsupportedAudioFileException("not a valid AU file"); |
| } |
| |
| // Skip the variable-length annotation field. The content of this field |
| // is currently undefined by AU specification and is unsupported by |
| // JavaSound, so seek past the header |
| dis.skipBytes(headerSize - AuFileFormat.AU_HEADERSIZE); |
| |
| // Even if the sampleSizeInBits and channels are supported we can get an |
| // unsupported frameSize because of overflow |
| final int frameSize = calculatePCMFrameSize(sampleSizeInBits, channels); |
| if (frameSize <= 0) { |
| throw new UnsupportedAudioFileException("Invalid frame size"); |
| } |
| |
| //$$fb 2002-11-02: fix for 4629669: AU file reader: problems with empty files |
| //$$fb 2003-10-20: fix for 4940459: AudioInputStream.getFrameLength() returns 0 instead of NOT_SPECIFIED |
| long frameLength = AudioSystem.NOT_SPECIFIED; |
| long byteLength = AudioSystem.NOT_SPECIFIED; |
| if (dataSize != AuFileFormat.UNKNOWN_SIZE) { |
| frameLength = dataSize / frameSize; |
| byteLength = dataSize + headerSize; |
| } |
| final AudioFormat format = new AudioFormat(encoding, sampleRate, |
| sampleSizeInBits, channels, |
| frameSize, sampleRate, true); |
| return new AuFileFormat(Type.AU, byteLength, format, frameLength); |
| } |
| } |