9fee0ec4ca
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7101 a1c6a512-1295-4272-9138-f99709370657
115 lines
4.3 KiB
Java
115 lines
4.3 KiB
Java
/*
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* WaveTool.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 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.AudioSystem;
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import javax.sound.sampled.AudioFormat;
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import javax.sound.sampled.AudioFileFormat;
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/**
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* Common constants and methods for handling wave files.
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*
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* @author Florian Bomers
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*/
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public class WaveTool {
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public static final int WAVE_RIFF_MAGIC = 0x52494646; // "RIFF"
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public static final int WAVE_WAVE_MAGIC = 0x57415645; // "WAVE"
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public static final int WAVE_FMT_MAGIC = 0x666D7420; // "fmt "
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public static final int WAVE_DATA_MAGIC = 0x64617461; // "DATA"
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public static final int WAVE_FACT_MAGIC = 0x66616374; // "fact"
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public static final short WAVE_FORMAT_UNSPECIFIED = 0;
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public static final short WAVE_FORMAT_PCM = 1;
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public static final short WAVE_FORMAT_MS_ADPCM = 2;
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public static final short WAVE_FORMAT_ALAW = 6;
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public static final short WAVE_FORMAT_ULAW = 7;
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public static final short WAVE_FORMAT_IMA_ADPCM = 17; // same as DVI_ADPCM
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public static final short WAVE_FORMAT_G723_ADPCM = 20;
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public static final short WAVE_FORMAT_GSM610 = 49;
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public static final short WAVE_FORMAT_G721_ADPCM = 64;
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public static final short WAVE_FORMAT_MPEG = 80;
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public static final int MIN_FMT_CHUNK_LENGTH=14;
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public static final int MIN_DATA_OFFSET=12+8+MIN_FMT_CHUNK_LENGTH+8;
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public static final int MIN_FACT_CHUNK_LENGTH = 4;
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// we always write the sample size in bits and the length of extra bytes.
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// There are programs (CoolEdit) that rely on the
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// additional entry for sample size in bits.
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public static final int FMT_CHUNK_SIZE=18;
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public static final int RIFF_CONTAINER_CHUNK_SIZE=12;
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public static final int CHUNK_HEADER_SIZE=8;
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public static final int DATA_OFFSET=RIFF_CONTAINER_CHUNK_SIZE
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+CHUNK_HEADER_SIZE+FMT_CHUNK_SIZE+CHUNK_HEADER_SIZE;
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public static AudioFormat.Encoding GSM0610 = new AudioFormat.Encoding("GSM0610");
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public static AudioFormat.Encoding IMA_ADPCM = new AudioFormat.Encoding("IMA_ADPCM");
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public static short getFormatCode(AudioFormat format) {
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AudioFormat.Encoding encoding = format.getEncoding();
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int nSampleSize = format.getSampleSizeInBits();
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boolean littleEndian = !format.isBigEndian();
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boolean frameSizeOK=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 (nSampleSize==8 && frameSizeOK
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&& (encoding.equals(AudioFormat.Encoding.PCM_SIGNED)
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|| encoding.equals(AudioFormat.Encoding.PCM_UNSIGNED))) {
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return WAVE_FORMAT_PCM;
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} else if (nSampleSize>8 && frameSizeOK && littleEndian
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&& encoding.equals(AudioFormat.Encoding.PCM_SIGNED)) {
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return WAVE_FORMAT_PCM;
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} else if (encoding.equals(AudioFormat.Encoding.ULAW)
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&& (nSampleSize==AudioSystem.NOT_SPECIFIED || nSampleSize == 8)
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&& frameSizeOK) {
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return WAVE_FORMAT_ULAW;
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} else if (encoding.equals(AudioFormat.Encoding.ALAW)
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&& (nSampleSize==AudioSystem.NOT_SPECIFIED || nSampleSize == 8)
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&& frameSizeOK) {
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return WAVE_FORMAT_ALAW;
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} else if (encoding.equals(new AudioFormat.Encoding("IMA_ADPCM"))
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&& nSampleSize == 4)
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{
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return WAVE_FORMAT_IMA_ADPCM;
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}
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else if (encoding.equals(GSM0610)) {
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return WAVE_FORMAT_GSM610;
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}
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return WAVE_FORMAT_UNSPECIFIED;
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}
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}
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/*** WaveTool.java ***/
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