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/*
* TMatrixFormatConversionProvider.java
*/
/*
* Copyright (c) 1999, 2000 by Matthias Pfisterer <Matthias.Pfisterer@gmx.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.
*
*/
package org.tritonus.share.sampled.convert;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.HashMap;
import java.util.ArrayList;
import java.util.Iterator;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.spi.FormatConversionProvider;
import org.tritonus.share.sampled.AudioFormats;
import org.tritonus.share.ArraySet;
/**
* Base class for arbitrary formatConversionProviders.
*
* @author Matthias Pfisterer
*/
public abstract class TMatrixFormatConversionProvider
extends TSimpleFormatConversionProvider
{
/*
* keys: source AudioFormat
* values: collection of possible target encodings
*
* Note that accessing values with get() is not appropriate,
* since the equals() method in AudioFormat is not overloaded.
* The hashtable is just used as a convenient storage
* organization.
*/
private Map m_targetEncodingsFromSourceFormat;
/*
* keys: source AudioFormat
* values: a Map that contains a mapping from target encodings
* (keys) to a collection of target formats (values).
*
* Note that accessing values with get() is not appropriate,
* since the equals() method in AudioFormat is not overloaded.
* The hashtable is just used as a convenient storage
* organization.
*/
private Map m_targetFormatsFromSourceFormat;
protected TMatrixFormatConversionProvider(
List sourceFormats,
List targetFormats,
boolean[][] abConversionPossible)
{
super(sourceFormats,
targetFormats);
m_targetEncodingsFromSourceFormat = new HashMap();
m_targetFormatsFromSourceFormat = new HashMap();
for (int nSourceFormat = 0;
nSourceFormat < sourceFormats.size();
nSourceFormat++)
{
AudioFormat sourceFormat = (AudioFormat) sourceFormats.get(nSourceFormat);
List supportedTargetEncodings = new ArraySet();
m_targetEncodingsFromSourceFormat.put(sourceFormat, supportedTargetEncodings);
Map targetFormatsFromTargetEncodings = new HashMap();
m_targetFormatsFromSourceFormat.put(sourceFormat, targetFormatsFromTargetEncodings);
for (int nTargetFormat = 0;
nTargetFormat < targetFormats.size();
nTargetFormat++)
{
AudioFormat targetFormat = (AudioFormat) targetFormats.get(nTargetFormat);
if (abConversionPossible[nSourceFormat][nTargetFormat])
{
AudioFormat.Encoding targetEncoding = targetFormat.getEncoding();
supportedTargetEncodings.add(targetEncoding);
Collection supportedTargetFormats = (Collection) targetFormatsFromTargetEncodings.get(targetEncoding);
if (supportedTargetFormats == null)
{
supportedTargetFormats = new ArraySet();
targetFormatsFromTargetEncodings.put(targetEncoding, supportedTargetFormats);
}
supportedTargetFormats.add(targetFormat);
}
}
}
}
public AudioFormat.Encoding[] getTargetEncodings(AudioFormat sourceFormat)
{
Iterator iterator = m_targetEncodingsFromSourceFormat.entrySet().iterator();
while (iterator.hasNext())
{
Map.Entry entry = (Map.Entry) iterator.next();
AudioFormat format = (AudioFormat) entry.getKey();
if (AudioFormats.matches(format, sourceFormat))
{
Collection targetEncodings = (Collection) entry.getValue();
return (AudioFormat.Encoding[]) targetEncodings.toArray(EMPTY_ENCODING_ARRAY);
}
}
return EMPTY_ENCODING_ARRAY;
}
// TODO: this should work on the array returned by getTargetEncodings(AudioFormat)
/*
public boolean isConversionSupported(AudioFormat.Encoding targetEncoding, AudioFormat sourceFormat)
{
return isAllowedSourceFormat(sourceFormat) &&
isTargetEncodingSupported(targetEncoding);
}
*/
public AudioFormat[] getTargetFormats(AudioFormat.Encoding targetEncoding, AudioFormat sourceFormat)
{
Iterator iterator = m_targetFormatsFromSourceFormat.entrySet().iterator();
while (iterator.hasNext())
{
Map.Entry entry = (Map.Entry) iterator.next();
AudioFormat format = (AudioFormat) entry.getKey();
if (AudioFormats.matches(format, sourceFormat))
{
Map targetEncodings = (Map) entry.getValue();
Collection targetFormats = (Collection) targetEncodings.get(targetEncoding);
if (targetFormats != null)
{
return (AudioFormat[]) targetFormats.toArray(EMPTY_FORMAT_ARRAY);
}
else
{
return EMPTY_FORMAT_ARRAY;
}
}
}
return EMPTY_FORMAT_ARRAY;
}
}
/*** TMatrixFormatConversionProvider.java ***/
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