| /* |
| * Copyright (c) 1999, 2013, 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.BufferedInputStream; |
| import java.io.DataInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| |
| 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; |
| |
| |
| /** |
| * AU file reader. |
| * |
| * @author Kara Kytle |
| * @author Jan Borgersen |
| * @author Florian Bomers |
| */ |
| public final class AuFileReader extends SunFileReader { |
| |
| // METHODS TO IMPLEMENT AudioFileReader |
| |
| /** |
| * Obtains the audio file format of the input stream provided. The stream must |
| * point to valid audio file data. In general, audio file providers may |
| * need to read some data from the stream before determining whether they |
| * support it. These parsers must |
| * be able to mark the stream, read enough data to determine whether they |
| * support the stream, and, if not, reset the stream's read pointer to its original |
| * position. If the input stream does not support this, this method may fail |
| * with an IOException. |
| * @param stream the input stream from which file format information should be |
| * extracted |
| * @return an <code>AudioFileFormat</code> object describing the audio file format |
| * @throws UnsupportedAudioFileException if the stream does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| * @see InputStream#markSupported |
| * @see InputStream#mark |
| */ |
| public AudioFileFormat getAudioFileFormat(InputStream stream) throws UnsupportedAudioFileException, IOException { |
| |
| AudioFormat format = null; |
| AuFileFormat fileFormat = null; |
| int maxReadLength = 28; |
| boolean bigendian = false; |
| int magic = -1; |
| int headerSize = -1; |
| int dataSize = -1; |
| int encoding_local = -1; |
| int sampleRate = -1; |
| int frameRate = -1; |
| int frameSize = -1; |
| int channels = -1; |
| final int sampleSizeInBits; |
| int length = 0; |
| int nread = 0; |
| AudioFormat.Encoding encoding = null; |
| |
| DataInputStream dis = new DataInputStream( stream ); |
| |
| dis.mark(maxReadLength); |
| |
| magic = dis.readInt(); |
| |
| if (! (magic == AuFileFormat.AU_SUN_MAGIC) || (magic == AuFileFormat.AU_DEC_MAGIC) || |
| (magic == AuFileFormat.AU_SUN_INV_MAGIC) || (magic == AuFileFormat.AU_DEC_INV_MAGIC) ) { |
| |
| // not AU, reset the stream, place into exception, throw exception |
| dis.reset(); |
| throw new UnsupportedAudioFileException("not an AU file"); |
| } |
| |
| if ((magic == AuFileFormat.AU_SUN_MAGIC) || (magic == AuFileFormat.AU_DEC_MAGIC)) { |
| bigendian = true; // otherwise little-endian |
| } |
| |
| headerSize = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; |
| dataSize = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; |
| encoding_local = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; |
| sampleRate = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; |
| channels = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; |
| if (channels <= 0) { |
| dis.reset(); |
| throw new UnsupportedAudioFileException("Invalid number of channels"); |
| } |
| |
| frameRate = sampleRate; |
| |
| switch (encoding_local) { |
| 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: |
| // $$jb: 04.29.99: 8bit linear is *signed*, not *unsigned* |
| encoding = AudioFormat.Encoding.PCM_SIGNED; |
| sampleSizeInBits = 8; |
| break; |
| case AuFileFormat.AU_LINEAR_16: |
| encoding = AudioFormat.Encoding.PCM_SIGNED; |
| sampleSizeInBits = 16; |
| break; |
| case AuFileFormat.AU_LINEAR_24: |
| encoding = AudioFormat.Encoding.PCM_SIGNED; |
| |
| sampleSizeInBits = 24; |
| break; |
| case AuFileFormat.AU_LINEAR_32: |
| encoding = AudioFormat.Encoding.PCM_SIGNED; |
| |
| sampleSizeInBits = 32; |
| break; |
| // $jb: 03.19.99: we don't support these ... |
| /* case AuFileFormat.AU_FLOAT: |
| encoding = new AudioFormat.FLOAT; |
| sampleSizeInBits = 32; |
| break; |
| case AuFileFormat.AU_DOUBLE: |
| encoding = new AudioFormat.DOUBLE; |
| sampleSizeInBits = 8; |
| break; |
| case AuFileFormat.AU_ADPCM_G721: |
| encoding = new AudioFormat.G721_ADPCM; |
| sampleSizeInBits = 16; |
| break; |
| case AuFileFormat.AU_ADPCM_G723_3: |
| encoding = new AudioFormat.G723_3; |
| sampleSize = 24; |
| SamplePerUnit = 8; |
| break; |
| case AuFileFormat.AU_ADPCM_G723_5: |
| encoding = new AudioFormat.G723_5; |
| sampleSize = 40; |
| SamplePerUnit = 8; |
| break; |
| */ |
| default: |
| // unsupported filetype, throw exception |
| dis.reset(); |
| throw new UnsupportedAudioFileException("not a valid AU file"); |
| } |
| |
| frameSize = calculatePCMFrameSize(sampleSizeInBits, channels); |
| //$$fb 2002-11-02: fix for 4629669: AU file reader: problems with empty files |
| if( dataSize < 0 ) { |
| length = AudioSystem.NOT_SPECIFIED; |
| } else { |
| //$$fb 2003-10-20: fix for 4940459: AudioInputStream.getFrameLength() returns 0 instead of NOT_SPECIFIED |
| length = dataSize / frameSize; |
| } |
| |
| format = new AudioFormat( encoding, (float)sampleRate, sampleSizeInBits, |
| channels, frameSize, (float)frameRate, bigendian); |
| |
| fileFormat = new AuFileFormat( AudioFileFormat.Type.AU, dataSize+headerSize, |
| format, length); |
| |
| dis.reset(); // Throws IOException |
| return fileFormat; |
| |
| } |
| |
| |
| /** |
| * Obtains the audio file format of the URL provided. The URL must |
| * point to valid audio file data. |
| * @param url the URL from which file format information should be |
| * extracted |
| * @return an <code>AudioFileFormat</code> object describing the audio file format |
| * @throws UnsupportedAudioFileException if the URL does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| */ |
| public AudioFileFormat getAudioFileFormat(URL url) throws UnsupportedAudioFileException, IOException { |
| |
| InputStream urlStream = null; |
| BufferedInputStream bis = null; |
| AudioFileFormat fileFormat = null; |
| AudioFormat format = null; |
| |
| urlStream = url.openStream(); // throws IOException |
| |
| try { |
| bis = new BufferedInputStream( urlStream, bisBufferSize ); |
| |
| fileFormat = getAudioFileFormat( bis ); // throws UnsupportedAudioFileException |
| } finally { |
| urlStream.close(); |
| } |
| |
| return fileFormat; |
| } |
| |
| |
| /** |
| * Obtains the audio file format of the File provided. The File must |
| * point to valid audio file data. |
| * @param file the File from which file format information should be |
| * extracted |
| * @return an <code>AudioFileFormat</code> object describing the audio file format |
| * @throws UnsupportedAudioFileException if the File does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| */ |
| public AudioFileFormat getAudioFileFormat(File file) throws UnsupportedAudioFileException, IOException { |
| |
| FileInputStream fis = null; |
| BufferedInputStream bis = null; |
| AudioFileFormat fileFormat = null; |
| AudioFormat format = null; |
| |
| fis = new FileInputStream( file ); // throws IOException |
| // part of fix for 4325421 |
| try { |
| bis = new BufferedInputStream( fis, bisBufferSize ); |
| fileFormat = getAudioFileFormat( bis ); // throws UnsupportedAudioFileException |
| } finally { |
| fis.close(); |
| } |
| |
| return fileFormat; |
| } |
| |
| |
| /** |
| * Obtains an audio stream from the input stream provided. The stream must |
| * point to valid audio file data. In general, audio file providers may |
| * need to read some data from the stream before determining whether they |
| * support it. These parsers must |
| * be able to mark the stream, read enough data to determine whether they |
| * support the stream, and, if not, reset the stream's read pointer to its original |
| * position. If the input stream does not support this, this method may fail |
| * with an IOException. |
| * @param stream the input stream from which the <code>AudioInputStream</code> should be |
| * constructed |
| * @return an <code>AudioInputStream</code> object based on the audio file data contained |
| * in the input stream. |
| * @throws UnsupportedAudioFileException if the stream does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| * @see InputStream#markSupported |
| * @see InputStream#mark |
| */ |
| public AudioInputStream getAudioInputStream(InputStream stream) throws UnsupportedAudioFileException, IOException { |
| |
| DataInputStream dis = null; |
| int headerSize; |
| AudioFileFormat fileFormat = null; |
| AudioFormat format = null; |
| |
| |
| fileFormat = getAudioFileFormat( stream ); // throws UnsupportedAudioFileException, IOException |
| |
| // if we passed this call, we have an AU file. |
| |
| format = fileFormat.getFormat(); |
| |
| dis = new DataInputStream(stream); |
| |
| // now seek past the header |
| |
| dis.readInt(); // magic |
| headerSize = (format.isBigEndian()==true ? dis.readInt() : rllong(dis) ); |
| dis.skipBytes( headerSize - 8 ); |
| |
| |
| // we've got everything, and the stream should be at the |
| // beginning of the data chunk, so return an AudioInputStream. |
| |
| return new AudioInputStream(dis, format, fileFormat.getFrameLength()); |
| } |
| |
| |
| /** |
| * Obtains an audio stream from the URL provided. The URL must |
| * point to valid audio file data. |
| * @param url the URL for which the <code>AudioInputStream</code> should be |
| * constructed |
| * @return an <code>AudioInputStream</code> object based on the audio file data pointed |
| * to by the URL |
| * @throws UnsupportedAudioFileException if the URL does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| */ |
| public AudioInputStream getAudioInputStream(URL url) throws UnsupportedAudioFileException, IOException { |
| |
| InputStream urlStream = null; |
| BufferedInputStream bis = null; |
| AudioFileFormat fileFormat = null; |
| |
| urlStream = url.openStream(); // throws IOException |
| AudioInputStream result = null; |
| try { |
| bis = new BufferedInputStream( urlStream, bisBufferSize ); |
| result = getAudioInputStream( (InputStream)bis ); |
| } finally { |
| if (result == null) { |
| urlStream.close(); |
| } |
| } |
| return result; |
| } |
| |
| |
| /** |
| * Obtains an audio stream from the File provided. The File must |
| * point to valid audio file data. |
| * @param file the File for which the <code>AudioInputStream</code> should be |
| * constructed |
| * @return an <code>AudioInputStream</code> object based on the audio file data pointed |
| * to by the File |
| * @throws UnsupportedAudioFileException if the File does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| */ |
| public AudioInputStream getAudioInputStream(File file) throws UnsupportedAudioFileException, IOException { |
| |
| FileInputStream fis = null; |
| BufferedInputStream bis = null; |
| AudioFileFormat fileFormat = null; |
| |
| fis = new FileInputStream( file ); // throws IOException |
| AudioInputStream result = null; |
| // part of fix for 4325421 |
| try { |
| bis = new BufferedInputStream( fis, bisBufferSize ); |
| result = getAudioInputStream( (InputStream)bis ); |
| } finally { |
| if (result == null) { |
| fis.close(); |
| } |
| } |
| |
| return result; |
| } |
| } |
