96 lines
3.3 KiB
Java
96 lines
3.3 KiB
Java
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/*
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* AuTool.java
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*
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* This file is part of Tritonus: http://www.tritonus.org/
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*/
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/*
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* Copyright (c) 2000,2001 by Florian Bomers <http://www.bomers.de>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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/*
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|<--- this code is formatted to fit into 80 columns --->|
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*/
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package org.tritonus.sampled.file;
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import javax.sound.sampled.AudioFormat;
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import javax.sound.sampled.AudioFileFormat;
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import javax.sound.sampled.AudioSystem;
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/** Common constants and methods for handling au files.
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*
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* @author Florian Bomers
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*/
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public class AuTool {
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public static final int AU_HEADER_MAGIC = 0x2e736e64;
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public static final int AUDIO_UNKNOWN_SIZE = -1;
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// length of header in bytes
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public static final int DATA_OFFSET = 24;
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public static final int SND_FORMAT_UNSPECIFIED = 0;
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public static final int SND_FORMAT_MULAW_8 = 1;
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public static final int SND_FORMAT_LINEAR_8 = 2;
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public static final int SND_FORMAT_LINEAR_16 = 3;
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public static final int SND_FORMAT_LINEAR_24 = 4;
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public static final int SND_FORMAT_LINEAR_32 = 5;
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public static final int SND_FORMAT_FLOAT = 6;
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public static final int SND_FORMAT_DOUBLE = 7;
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public static final int SND_FORMAT_ADPCM_G721 = 23;
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public static final int SND_FORMAT_ADPCM_G722 = 24;
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public static final int SND_FORMAT_ADPCM_G723_3 = 25;
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public static final int SND_FORMAT_ADPCM_G723_5 = 26;
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public static final int SND_FORMAT_ALAW_8 = 27;
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public static int getFormatCode(AudioFormat format) {
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AudioFormat.Encoding encoding = format.getEncoding();
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int nSampleSize = format.getSampleSizeInBits();
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// must be big endian for >8 bit formats
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boolean bigEndian = format.isBigEndian();
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// $$fb 2000-08-16: check the frame size, too.
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boolean frameSizeOK=(
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format.getFrameSize()==AudioSystem.NOT_SPECIFIED
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|| format.getChannels()!=AudioSystem.NOT_SPECIFIED
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|| format.getFrameSize()==nSampleSize/8*format.getChannels());
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if (encoding.equals(AudioFormat.Encoding.ULAW) && nSampleSize == 8 && frameSizeOK) {
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return SND_FORMAT_MULAW_8;
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} else if (encoding.equals(AudioFormat.Encoding.PCM_SIGNED) && frameSizeOK) {
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if (nSampleSize == 8) {
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return SND_FORMAT_LINEAR_8;
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} else if (nSampleSize == 16 && bigEndian) {
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return SND_FORMAT_LINEAR_16;
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} else if (nSampleSize == 24 && bigEndian) {
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return SND_FORMAT_LINEAR_24;
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} else if (nSampleSize == 32 && bigEndian) {
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return SND_FORMAT_LINEAR_32;
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}
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} else if (encoding.equals(AudioFormat.Encoding.ALAW) && nSampleSize == 8 && frameSizeOK) {
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return SND_FORMAT_ALAW_8;
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}
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return SND_FORMAT_UNSPECIFIED;
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}
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}
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/*** AuTool.java ***/
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