116 lines
4.3 KiB
Java
116 lines
4.3 KiB
Java
|
/*
|
||
|
|
* WaveTool.java
|
||
|
|
*
|
||
|
|
* This file is part of Tritonus: http://www.tritonus.org/
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2000 by Florian Bomers <http://www.bomers.de>
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU Library General Public License as published
|
||
|
|
* by the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program 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 Library General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Library General Public
|
||
|
|
* License along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
|<--- this code is formatted to fit into 80 columns --->|
|
||
|
|
*/
|
||
|
|
|
||
|
|
package org.tritonus.sampled.file;
|
||
|
|
|
||
|
|
import javax.sound.sampled.AudioSystem;
|
||
|
|
import javax.sound.sampled.AudioFormat;
|
||
|
|
import javax.sound.sampled.AudioFileFormat;
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Common constants and methods for handling wave files.
|
||
|
|
*
|
||
|
|
* @author Florian Bomers
|
||
|
|
*/
|
||
|
|
|
||
|
|
public class WaveTool {
|
||
|
|
|
||
|
|
public static final int WAVE_RIFF_MAGIC = 0x52494646; // "RIFF"
|
||
|
|
public static final int WAVE_WAVE_MAGIC = 0x57415645; // "WAVE"
|
||
|
|
public static final int WAVE_FMT_MAGIC = 0x666D7420; // "fmt "
|
||
|
|
public static final int WAVE_DATA_MAGIC = 0x64617461; // "DATA"
|
||
|
|
public static final int WAVE_FACT_MAGIC = 0x66616374; // "fact"
|
||
|
|
|
||
|
|
public static final short WAVE_FORMAT_UNSPECIFIED = 0;
|
||
|
|
public static final short WAVE_FORMAT_PCM = 1;
|
||
|
|
public static final short WAVE_FORMAT_MS_ADPCM = 2;
|
||
|
|
public static final short WAVE_FORMAT_ALAW = 6;
|
||
|
|
public static final short WAVE_FORMAT_ULAW = 7;
|
||
|
|
public static final short WAVE_FORMAT_IMA_ADPCM = 17; // same as DVI_ADPCM
|
||
|
|
public static final short WAVE_FORMAT_G723_ADPCM = 20;
|
||
|
|
public static final short WAVE_FORMAT_GSM610 = 49;
|
||
|
|
public static final short WAVE_FORMAT_G721_ADPCM = 64;
|
||
|
|
public static final short WAVE_FORMAT_MPEG = 80;
|
||
|
|
|
||
|
|
public static final int MIN_FMT_CHUNK_LENGTH=14;
|
||
|
|
public static final int MIN_DATA_OFFSET=12+8+MIN_FMT_CHUNK_LENGTH+8;
|
||
|
|
public static final int MIN_FACT_CHUNK_LENGTH = 4;
|
||
|
|
|
||
|
|
// we always write the sample size in bits and the length of extra bytes.
|
||
|
|
// There are programs (CoolEdit) that rely on the
|
||
|
|
// additional entry for sample size in bits.
|
||
|
|
public static final int FMT_CHUNK_SIZE=18;
|
||
|
|
public static final int RIFF_CONTAINER_CHUNK_SIZE=12;
|
||
|
|
public static final int CHUNK_HEADER_SIZE=8;
|
||
|
|
public static final int DATA_OFFSET=RIFF_CONTAINER_CHUNK_SIZE
|
||
|
|
+CHUNK_HEADER_SIZE+FMT_CHUNK_SIZE+CHUNK_HEADER_SIZE;
|
||
|
|
|
||
|
|
public static AudioFormat.Encoding GSM0610 = new AudioFormat.Encoding("GSM0610");
|
||
|
|
public static AudioFormat.Encoding IMA_ADPCM = new AudioFormat.Encoding("IMA_ADPCM");
|
||
|
|
|
||
|
|
public static short getFormatCode(AudioFormat format) {
|
||
|
|
AudioFormat.Encoding encoding = format.getEncoding();
|
||
|
|
int nSampleSize = format.getSampleSizeInBits();
|
||
|
|
boolean littleEndian = !format.isBigEndian();
|
||
|
|
boolean frameSizeOK=format.getFrameSize()==AudioSystem.NOT_SPECIFIED
|
||
|
|
|| format.getChannels()!=AudioSystem.NOT_SPECIFIED
|
||
|
|
|| format.getFrameSize()==nSampleSize/8*format.getChannels();
|
||
|
|
|
||
|
|
if (nSampleSize==8 && frameSizeOK
|
||
|
|
&& (encoding.equals(AudioFormat.Encoding.PCM_SIGNED)
|
||
|
|
|| encoding.equals(AudioFormat.Encoding.PCM_UNSIGNED))) {
|
||
|
|
return WAVE_FORMAT_PCM;
|
||
|
|
} else if (nSampleSize>8 && frameSizeOK && littleEndian
|
||
|
|
&& encoding.equals(AudioFormat.Encoding.PCM_SIGNED)) {
|
||
|
|
return WAVE_FORMAT_PCM;
|
||
|
|
} else if (encoding.equals(AudioFormat.Encoding.ULAW)
|
||
|
|
&& (nSampleSize==AudioSystem.NOT_SPECIFIED || nSampleSize == 8)
|
||
|
|
&& frameSizeOK) {
|
||
|
|
return WAVE_FORMAT_ULAW;
|
||
|
|
} else if (encoding.equals(AudioFormat.Encoding.ALAW)
|
||
|
|
&& (nSampleSize==AudioSystem.NOT_SPECIFIED || nSampleSize == 8)
|
||
|
|
&& frameSizeOK) {
|
||
|
|
return WAVE_FORMAT_ALAW;
|
||
|
|
} else if (encoding.equals(new AudioFormat.Encoding("IMA_ADPCM"))
|
||
|
|
&& nSampleSize == 4)
|
||
|
|
{
|
||
|
|
return WAVE_FORMAT_IMA_ADPCM;
|
||
|
|
}
|
||
|
|
else if (encoding.equals(GSM0610)) {
|
||
|
|
return WAVE_FORMAT_GSM610;
|
||
|
|
}
|
||
|
|
return WAVE_FORMAT_UNSPECIFIED;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/*** WaveTool.java ***/
|