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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/javax/sound/sampled/AU
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diff --git a/libjava/classpath/gnu/javax/sound/sampled/AU/AUReader.java b/libjava/classpath/gnu/javax/sound/sampled/AU/AUReader.java
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+/* AUReader.java -- Read AU files.
+ Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.javax.sound.sampled.AU;
+
+import javax.sound.sampled.AudioFormat;
+import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.AudioFileFormat;
+import javax.sound.sampled.AudioInputStream;
+import javax.sound.sampled.UnsupportedAudioFileException;
+import javax.sound.sampled.spi.AudioFileReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.BufferedInputStream;
+import java.io.InputStream;
+import java.io.FileInputStream;
+import java.net.URL;
+import java.nio.ByteBuffer;
+
+public class AUReader extends AudioFileReader
+{
+ private static class AUHeader
+ {
+ // Magic number identifying the file. '.snd'
+ private static final int MAGIC = 0x2e736e64;
+
+ public static final int SIZE = 24; // size of the header
+
+ // Encoding types
+ public static final int ULAW = 1; // 8-bit u-law
+ public static final int PCM8 = 2; // 8-bit PCM
+ public static final int PCM16 = 3; // 16-bit PCM
+ public static final int PCM24 = 4; // 24-bit PCM
+ public static final int PCM32 = 5; // 32-bit PCM
+ public static final int IEEE32 = 6; // 32-bit IEEE f.p.
+ public static final int IEEE64 = 7; // 64-bit IEEE f.p.
+ public static final int G721 = 23;
+ public static final int G722 = 24;
+ public static final int G723 = 25;
+ public static final int G723_5BIT = 26;
+ public static final int ALAW = 27; // 8-bit a-law
+
+ // Header data.
+ public int headerSize;
+ public int fileSize; // this value may not be set.
+ public int encoding;
+ public int sampleRate;
+ public int channels;
+ public int sampleSizeInBits;
+
+ public AUHeader(InputStream stream)
+ throws IOException, UnsupportedAudioFileException
+ {
+ byte[] hdr = new byte[24];
+ stream.read( hdr );
+ ByteBuffer buf = ByteBuffer.wrap(hdr);
+
+ if( buf.getInt() != MAGIC )
+ throw new UnsupportedAudioFileException("Not an AU format audio file.");
+ headerSize = buf.getInt();
+ fileSize = buf.getInt();
+ encoding = buf.getInt();
+ sampleRate = buf.getInt();
+ channels = buf.getInt();
+
+ switch(encoding)
+ {
+ case ULAW:
+ case PCM8:
+ case ALAW:
+ sampleSizeInBits = 8;
+ break;
+ case PCM16:
+ sampleSizeInBits = 16;
+ break;
+ case PCM24:
+ sampleSizeInBits = 24;
+ break;
+ case PCM32:
+ sampleSizeInBits = 32;
+ break;
+ default: // other types exist but are not supported. Yet.
+ throw new UnsupportedAudioFileException("Unsupported encoding.");
+ }
+ }
+
+ public AudioFormat getAudioFormat()
+ {
+ AudioFormat.Encoding encType = AudioFormat.Encoding.PCM_SIGNED;
+ if(encoding == 1)
+ encType = AudioFormat.Encoding.ULAW;
+ if(encoding == 27)
+ encType = AudioFormat.Encoding.ALAW;
+
+ return new AudioFormat(encType,
+ (float)sampleRate,
+ sampleSizeInBits,
+ channels,
+ (sampleSizeInBits >> 3) * channels,
+ (float)sampleRate,
+ true);
+ }
+
+ public AudioFileFormat getAudioFileFormat()
+ {
+ return new AudioFileFormat(new AUFormatType(),
+ getAudioFormat(),
+ AudioSystem.NOT_SPECIFIED);
+ }
+ }
+
+ public static class AUFormatType extends AudioFileFormat.Type
+ {
+ public AUFormatType()
+ {
+ super("AU", ".au");
+ }
+ }
+
+ public AudioFileFormat getAudioFileFormat(File file)
+ throws IOException, UnsupportedAudioFileException
+ {
+ return getAudioFileFormat(new FileInputStream(file));
+ }
+
+ public AudioFileFormat getAudioFileFormat(InputStream stream)
+ throws IOException, UnsupportedAudioFileException
+ {
+ if(!stream.markSupported())
+ throw new IOException("Stream must support marking.");
+
+ stream.mark(25);
+ AUHeader header = new AUHeader(stream);
+ stream.reset();
+
+ return header.getAudioFileFormat();
+ }
+
+ public AudioFileFormat getAudioFileFormat(URL url)
+ throws IOException, UnsupportedAudioFileException
+ {
+ return getAudioFileFormat(new BufferedInputStream(url.openStream()));
+ }
+
+ public AudioInputStream getAudioInputStream(File file)
+ throws IOException, UnsupportedAudioFileException
+ {
+ InputStream stream = new FileInputStream(file);
+ long length = file.length();
+
+ AUHeader header = new AUHeader( stream );
+ if( header.headerSize > AUHeader.SIZE )
+ stream.skip(header.headerSize - AUHeader.SIZE);
+
+ length -= header.headerSize;
+
+ return new AudioInputStream(stream, header.getAudioFormat(), length);
+ }
+
+ public AudioInputStream getAudioInputStream(InputStream stream)
+ throws IOException, UnsupportedAudioFileException
+ {
+ AUHeader header = new AUHeader( stream );
+ if( header.headerSize > AUHeader.SIZE )
+ stream.skip(header.headerSize - AUHeader.SIZE);
+
+ return new AudioInputStream(stream, header.getAudioFormat(),
+ AudioSystem.NOT_SPECIFIED);
+ }
+
+ public AudioInputStream getAudioInputStream(URL url)
+ throws IOException, UnsupportedAudioFileException
+ {
+ return getAudioInputStream(new BufferedInputStream(url.openStream()));
+ }
+}