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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.util.Iterator;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.Mixer;
@SuppressWarnings("cast")
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;
}
}
@SuppressWarnings("unchecked")
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;
}
/** @return the frame size, given the sample size in bits and number of channels */
public static int getFrameSize(int channels, int sampleSizeInBits) {
if (channels < 0 || sampleSizeInBits < 0) {
return AudioSystem.NOT_SPECIFIED;
}
return ((sampleSizeInBits + 7) / 8) * channels;
}
/** Conversion milliseconds to bytes */
public static long millis2Bytes(long ms, AudioFormat format) {
return millis2Bytes(ms, (double) format.getFrameRate(), format.getFrameSize());
}
/** Conversion milliseconds to bytes */
public static long millis2Bytes(long ms, double frameRate, int frameSize) {
return (long) (ms*frameRate/1000*frameSize);
}
/** convert milliseconds to bytes. Be careful to not exceed the integer maximum value */
public static int millis2Bytes(int ms, AudioFormat format) {
return millis2Bytes(ms, (double) format.getFrameRate(), format.getFrameSize());
}
/** convert milliseconds to bytes. Be careful to not exceed the integer maximum value */
public static int millis2Bytes(int ms, double frameRate, int frameSize) {
return (int) (ms*frameRate/1000*frameSize);
}
/** convert milliseconds to bytes. */
public static long millis2Bytes(double ms, AudioFormat format) {
return millis2Bytes(ms, format.getFrameRate(), format.getFrameSize());
}
/** convert milliseconds to bytes. */
public static long millis2Bytes(double ms, double frameRate, int frameSize) {
return (long) (ms*frameRate/1000.0*frameSize);
}
/** Conversion milliseconds to bytes, return value is frame-aligned */
public static long millis2BytesFrameAligned(long ms, AudioFormat format) {
return millis2BytesFrameAligned(ms, (double) format.getFrameRate(), format.getFrameSize());
}
/** Conversion milliseconds to bytes, return value is frame-aligned */
public static long millis2BytesFrameAligned(long ms, double frameRate, int frameSize) {
return ((long) (ms*frameRate/1000))*frameSize;
}
/** Conversion milliseconds to bytes, return value is frame-aligned */
public static int millis2BytesFrameAligned(int ms, AudioFormat format) {
return millis2BytesFrameAligned(ms, (double) format.getFrameRate(), format.getFrameSize());
}
/** Conversion milliseconds to bytes, return value is frame-aligned */
public static int millis2BytesFrameAligned(int ms, double frameRate, int frameSize) {
return ((int) (ms*frameRate/1000))*frameSize;
}
/** Conversion milliseconds to bytes, return value is frame-aligned */
public static long millis2BytesFrameAligned(double ms, AudioFormat format) {
return millis2BytesFrameAligned(ms, (double) format.getFrameRate(), format.getFrameSize());
}
/** Conversion milliseconds to bytes, return value is frame-aligned */
public static long millis2BytesFrameAligned(double ms, double frameRate, int frameSize) {
return ((long) (ms*frameRate/1000))*frameSize;
}
/** Conversion milliseconds to frames (samples) */
public static long millis2Frames(long ms, AudioFormat format) {
return millis2Frames(ms, (double) format.getFrameRate());
}
/** Conversion milliseconds to frames (samples) */
public static long millis2Frames(long ms, double frameRate) {
return (long) (ms*frameRate/1000.0);
}
/** Conversion milliseconds to frames (samples) */
public static int millis2Frames(int ms, AudioFormat format) {
return millis2Frames(ms, (double) format.getFrameRate());
}
/** Conversion milliseconds to frames (samples) */
public static int millis2Frames(int ms, double frameRate) {
return (int) (ms*frameRate/1000.0);
}
/** Conversion milliseconds to frames (samples) */
public static long millis2Frames(double ms, AudioFormat format) {
return (long) millis2FramesD(ms, (double) format.getFrameRate());
}
/** Conversion milliseconds to frames (samples) */
public static long millis2Frames(double ms, double frameRate) {
return (long) millis2FramesD(ms, frameRate);
}
/** Conversion milliseconds to frames (samples) */
public static double millis2FramesD(double ms, AudioFormat format) {
return millis2FramesD(ms, (double) format.getFrameRate());
}
/** Conversion milliseconds to frames (samples) */
public static double millis2FramesD(double ms, double frameRate) {
return ms*frameRate/1000.0;
}
/** Conversion bytes to milliseconds */
public static long bytes2Millis(long bytes, AudioFormat format) {
return (long) frames2MillisD(bytes/format.getFrameSize(), format.getFrameRate());
}
/** Conversion bytes to milliseconds */
public static int bytes2Millis(int bytes, AudioFormat format) {
return (int) frames2MillisD(bytes/format.getFrameSize(), format.getFrameRate());
}
/** Conversion bytes to milliseconds */
public static double bytes2MillisD(long bytes, AudioFormat format) {
return frames2MillisD(bytes/format.getFrameSize(), format.getFrameRate());
}
/** Conversion bytes to milliseconds */
public static double bytes2MillisD(long bytes, double frameRate, int frameSize) {
return frames2MillisD(bytes/frameSize, frameRate);
}
/** Conversion frames to milliseconds */
public static long frames2Millis(long frames, AudioFormat format) {
return (long) frames2MillisD(frames, format.getFrameRate());
}
/** Conversion frames to milliseconds */
public static int frames2Millis(int frames, AudioFormat format) {
return (int) frames2MillisD(frames, format.getFrameRate());
}
/** Conversion frames to milliseconds */
public static double frames2MillisD(long frames, AudioFormat format) {
return frames2MillisD(frames, format.getFrameRate());
}
/** Conversion frames to milliseconds */
public static double frames2MillisD(long frames, double frameRate) {
return frames/frameRate*1000.0;
}
/**
*
* @param sr1 the first sample rate to compare
* @param sr2 the second sample rate to compare
* @return true if the sample rates are (almost) identical
*/
public static boolean sampleRateEquals(float sr1, float sr2) {
return Math.abs(sr1-sr2)<0.0000001;
}
/**
* @param format the audio format to test
* @return true if the format is either PCM_SIGNED or PCM_UNSIGNED
*/
public static boolean isPCM(AudioFormat format) {
return format.getEncoding().equals(AudioFormat.Encoding.PCM_SIGNED)
|| format.getEncoding().equals(AudioFormat.Encoding.PCM_UNSIGNED);
}
/**
* Return if the passed mixer info is the Java Sound Audio Engine.
*
* @param mixerInfo the mixer info to query
* @return true if the mixer info describes the Java Sound Audio Engine
*/
public static boolean isJavaSoundAudioEngine(Mixer.Info mixerInfo) {
return (mixerInfo != null) && (mixerInfo.getName() != null)
&& mixerInfo.getName().equals("Java Sound Audio Engine");
}
/**
* Return if the passed line is writing to or reading from the Java Sound Audio Engine.
*
* @param line the data line to query
* @return true if the line is using the Java Sound Audio Engine
*/
public static boolean isJavaSoundAudioEngine(DataLine line) {
if (line != null) {
String clazz = line.getClass().toString();
return clazz.indexOf("MixerSourceLine") >= 0
|| clazz.indexOf("MixerClip") >= 0
|| clazz.indexOf("SimpleInputDevice") >= 0;
}
return false;
}
/**
* tries to guess if this program is running on a big endian platform
* @return true if the system's native endianness is big endian
*/
public static boolean isSystemBigEndian() {
return java.nio.ByteOrder.nativeOrder().equals(java.nio.ByteOrder.BIG_ENDIAN);
}
//$$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");
}
/**
* The value used for negative infinity in decibels. The default value is
* -100.0, which is approximately the s/n ratio achieved with 16-bit samples.
* If you use higher resolution, set this to a lower value, like -150.0.
*/
public static double SILENCE_DECIBEL = -100.0;
/**
* Get decibel from a linear factor.
*
* @param linearFactor 0..1..inf
* @return the converted decibel (SILENCE_DECIBEL...0...inf)
*/
public final static double linear2decibel(double linearFactor) {
if (linearFactor <= 0.0) {
return SILENCE_DECIBEL;
}
double ret = Math.log10(linearFactor) * 20.0;
if (ret < SILENCE_DECIBEL) {
ret = SILENCE_DECIBEL;
}
return ret;
}
/**
* Calculate the linear factor corresponding to the specified decibel level.
*
* @param decibels [SILENCE_DECIBEL...0...inf]
* @return linear factor [0...1...inf]
*/
public final static double decibel2linear(double decibels) {
if (decibels <= SILENCE_DECIBEL) {
return 0.0;
}
return Math.pow(10.0, decibels * 0.05);
}
}
/*** AudioUtils.java ***/
