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/*
* AudioUtils.java
*
* This file is part of Tritonus: http://www.tritonus.org/
*/
/*
* Copyright (c) 2000 by Matthias Pfisterer
*
* 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.share.sampled;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Collection;
import java.util.Iterator;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.spi.AudioFileWriter;
import org.tritonus.share.TDebug;
import org.tritonus.share.sampled.TConversionTool;
public class AudioUtils
{
public static long getLengthInBytes(AudioInputStream audioInputStream)
{
return getLengthInBytes(audioInputStream.getFormat(),
audioInputStream.getFrameLength());
/*
long lLengthInFrames = audioInputStream.getFrameLength();
int nFrameSize = audioInputStream.getFormat().getFrameSize();
if (lLengthInFrames >= 0 && nFrameSize >= 1)
{
return lLengthInFrames * nFrameSize;
}
else
{
return AudioSystem.NOT_SPECIFIED;
}
*/
}
/**
* if the passed value for lLength is
* AudioSystem.NOT_SPECIFIED (unknown
* length), the length in bytes becomes
* AudioSystem.NOT_SPECIFIED, too.
*/
public static long getLengthInBytes(AudioFormat audioFormat,
long lLengthInFrames)
{
int nFrameSize = audioFormat.getFrameSize();
if (lLengthInFrames >= 0 && nFrameSize >= 1)
{
return lLengthInFrames * nFrameSize;
}
else
{
return AudioSystem.NOT_SPECIFIED;
}
}
public static boolean containsFormat(AudioFormat sourceFormat,
Iterator possibleFormats)
{
while (possibleFormats.hasNext())
{
AudioFormat format = (AudioFormat) possibleFormats.next();
if (AudioFormats.matches(format, sourceFormat))
{
return true;
}
}
return false;
}
/**
* Conversion milliseconds -> bytes
*/
public static long millis2Bytes(long ms, AudioFormat format) {
return millis2Bytes(ms, format.getFrameRate(), format.getFrameSize());
}
public static long millis2Bytes(long ms, float frameRate, int frameSize) {
return (long) (ms*frameRate/1000*frameSize);
}
/**
* Conversion milliseconds -> bytes (bytes will be frame-aligned)
*/
public static long millis2BytesFrameAligned(long ms, AudioFormat format) {
return millis2BytesFrameAligned(ms, format.getFrameRate(), format.getFrameSize());
}
public static long millis2BytesFrameAligned(long ms, float frameRate, int frameSize) {
return ((long) (ms*frameRate/1000))*frameSize;
}
/**
* Conversion milliseconds -> frames
*/
public static long millis2Frames(long ms, AudioFormat format) {
return millis2Frames(ms, format.getFrameRate());
}
public static long millis2Frames(long ms, float frameRate) {
return (long) (ms*frameRate/1000);
}
/**
* Conversion bytes -> milliseconds
*/
public static long bytes2Millis(long bytes, AudioFormat format) {
return (long) (bytes/format.getFrameRate()*1000/format.getFrameSize());
}
/**
* Conversion frames -> milliseconds
*/
public static long frames2Millis(long frames, AudioFormat format) {
return (long) (frames/format.getFrameRate()*1000);
}
//$$fb 2000-07-18: added these debugging functions
public static String NS_or_number(int number) {
return (number==AudioSystem.NOT_SPECIFIED)?"NOT_SPECIFIED":String.valueOf(number);
}
public static String NS_or_number(float number) {
return (number==AudioSystem.NOT_SPECIFIED)?"NOT_SPECIFIED":String.valueOf(number);
}
/**
* For debugging purposes.
*/
public static String format2ShortStr(AudioFormat format) {
return format.getEncoding() + "-" +
NS_or_number(format.getChannels()) + "ch-" +
NS_or_number(format.getSampleSizeInBits()) + "bit-" +
NS_or_number(((int)format.getSampleRate())) + "Hz-"+
(format.isBigEndian() ? "be" : "le");
}
}
/*** AudioUtils.java ***/
|
