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Jindra Petřík
310
libsrc/avi/src/org/monte/media/Registry.java
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310
libsrc/avi/src/org/monte/media/Registry.java
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/*
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* @(#)Registry.java
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*
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* Copyright (c) 2011 Werner Randelshofer, Goldau, Switzerland.
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* All rights reserved.
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*
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* You may not use, copy or modify this file, except in compliance with the
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* license agreement you entered into with Werner Randelshofer.
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* For details see accompanying license terms.
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*/
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package org.monte.media;
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import java.io.File;
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import java.util.ArrayList;
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import static org.monte.media.FormatKeys.*;
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/**
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* The {@code Registry} for audio and video codecs.
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*
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* @author Werner Randelshofer
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* @version $Id: Registry.java 299 2013-01-03 07:40:18Z werner $
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*/
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public abstract class Registry {
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private static Registry instance;
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public static Registry getInstance() {
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if (instance == null) {
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instance = new DefaultRegistry();
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instance.init();
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}
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return instance;
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}
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/**
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* Initializes the registry.
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*/
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protected abstract void init();
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/**
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* Puts a codec into the registry.
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*
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* @param inputFormat The input format. Must not be null.
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* @param outputFormat The output format. Must not be null.
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* @param codecClass The codec class name. Must not be null.
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*/
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public abstract void putCodec(Format inputFormat, Format outputFormat, String codecClass);
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/**
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* Gets all codecs which can decode the specified format.
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*
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* @param format The format.
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* @return An array of codec class names. If no codec was found, an empty
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* array is returned.
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*/
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public final String[] getDecoderClasses(Format format) {
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return getCodecClasses(format, null);
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}
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/**
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* Gets all codecs which can decode the specified format.
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*
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* @param format The format.
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* @return An array of codec class names. If no codec was found, an empty
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* array is returned.
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*/
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public final String[] getEncoderClasses(Format format) {
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return getCodecClasses(null, format);
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}
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/**
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* Gets all codecs which can transcode from the specified input format to
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* the specified output format.
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*
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* @param inputFormat The input format.
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* @param outputFormat The output format.
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* @return An array of codec class names. If no codec was found, an empty
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* array is returned.
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*/
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public abstract String[] getCodecClasses(//
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Format inputFormat,
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Format outputFormat);
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/**
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* Gets all codecs which can decode the specified format.
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*
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* @param inputFormat The input format.
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* @return An array of codec class names. If no codec was found, an empty
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* array is returned.
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*/
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public final Codec[] getDecoders(Format inputFormat) {
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return getCodecs(inputFormat, null);
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}
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/**
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* Gets the first codec which can decode the specified format.
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*
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* @param inputFormat The output format.
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* @return A codec. Returns null if no codec was found.
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*/
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public Codec getDecoder(Format inputFormat) {
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return getCodec(inputFormat, null);
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}
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/**
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* Gets all codecs which can encode the specified format.
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*
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* @param outputFormat The output format.
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* @return An array of codecs. If no codec was found, an empty array is
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* returned.
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*/
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public final Codec[] getEncoders(Format outputFormat) {
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return getCodecs(null, outputFormat);
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}
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/**
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* Gets the first codec which can encode the specified foramt.
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*
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* @param outputFormat The output format.
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* @return A codec. Returns null if no codec was found.
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*/
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public Codec getEncoder(Format outputFormat) {
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return getCodec(null, outputFormat);
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}
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/**
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* Gets all codecs which can transcode from the specified input format to
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* the specified output format.
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*
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* @param inputFormat The input format.
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* @param outputFormat The output format.
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* @return An array of codec class names. If no codec was found, an empty
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* array is returned.
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*/
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public Codec[] getCodecs(Format inputFormat, Format outputFormat) {
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String[] clazz = getCodecClasses(inputFormat, outputFormat);
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ArrayList<Codec> codecs = new ArrayList<Codec>(clazz.length);
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for (int i = 0; i < clazz.length; i++) {
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try {
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codecs.add((Codec) Class.forName(clazz[i]).newInstance());
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} catch (Exception ex) {
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//ex.printStackTrace();
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System.err.println("Monte Registry. Codec class not found: " + clazz[i]);
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unregisterCodec(clazz[i]);
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}
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}
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return codecs.toArray(new Codec[codecs.size()]);
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}
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/**
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* Gets a codec which can transcode from the specified input format to the
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* specified output format.
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*
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* @param inputFormat The input format.
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* @param outputFormat The output format.
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* @return A codec or null.
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*/
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public Codec getCodec(Format inputFormat, Format outputFormat) {
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String[] clazz = getCodecClasses(inputFormat, outputFormat);
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for (int i = 0; i < clazz.length; i++) {
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try {
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Codec codec = ((Codec) Class.forName(clazz[i]).newInstance());
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codec.setInputFormat(inputFormat);
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if (outputFormat != null) {
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codec.setOutputFormat(outputFormat);
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}
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return codec;
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} catch (Exception ex) {
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//ex.printStackTrace();
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System.err.println("Monte Registry. Codec class not found: " + clazz[i]);
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unregisterCodec(clazz[i]);
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}
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}
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return null;
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}
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/**
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* Puts a reader into the registry.
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*
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* @param fileFormat The file format, e.g."video/avi", "video/quicktime".
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* Use "Java" for formats which are not tied to a file format. Must not be
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* null.
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* @param readerClass The reader class name. Must not be null.
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*/
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public abstract void putReader(Format fileFormat, String readerClass);
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/**
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* Puts a writer into the registry.
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*
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* @param fileFormat The file format, e.g."video/avi", "video/quicktime".
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* Use "Java" for formats which are not tied to a file format. Must not be
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* null.
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* @param writerClass The writer class name. Must not be null.
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*/
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public abstract void putWriter(Format fileFormat, String writerClass);
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/**
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* Gets all reader class names from the registry for the specified file
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* format.
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*
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* @param fileFormat The file format, e.g."AVI", "QuickTime".
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* @return The reader class names.
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*/
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public abstract String[] getReaderClasses(Format fileFormat);
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/**
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* Gets all writer class names from the registry for the specified file
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* format.
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*
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* @param fileFormat The file format, e.g."AVI", "QuickTime".
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* @return The writer class names.
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*/
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public abstract String[] getWriterClasses(Format fileFormat);
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public MovieReader getReader(Format fileFormat, File file) {
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String[] clazz = getReaderClasses(fileFormat);
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for (int i = 0; i < clazz.length; i++) {
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try {
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return ((MovieReader) Class.forName(clazz[i]).getConstructor(File.class).newInstance(file));
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} catch (Exception ex) {
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ex.printStackTrace();
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}
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}
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return null;
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}
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public MovieWriter getWriter(File file) {
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Format format = getFileFormat(file);
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return format == null ? null : getWriter(format, file);
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}
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public MovieWriter getWriter(Format fileFormat, File file) {
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String[] clazz = getWriterClasses(fileFormat);
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for (int i = 0; i < clazz.length; i++) {
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try {
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return ((MovieWriter) Class.forName(clazz[i]).getConstructor(File.class).newInstance(file));
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} catch (Exception ex) {
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ex.printStackTrace();
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}
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}
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return null;
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}
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public MovieReader getReader(File file) {
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Format format = getFileFormat(file);
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return format == null ? null : getReader(format, file);
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}
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public abstract void putFileFormat(String extension, Format format);
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public abstract Format getFileFormat(File file);
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public abstract Format[] getReaderFormats();
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public abstract Format[] getWriterFormats();
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public abstract Format[] getFileFormats();
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public abstract String getExtension(Format ff);
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/**
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* Suggests output formats for the given input media format and specified
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* file format.
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*
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* @param inputMediaFormat
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* @param outputFileFormat
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* @return List of output media formats.
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*/
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public ArrayList<Format> suggestOutputFormats(Format inputMediaFormat, Format outputFileFormat) {
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ArrayList<Format> formats = new ArrayList<Format>();
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Format matchFormat = new Format(//
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MimeTypeKey, outputFileFormat.get(MimeTypeKey),//
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MediaTypeKey, inputMediaFormat.get(MediaTypeKey));
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Codec[] codecs = getEncoders(matchFormat);
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int matchingCount = 0;
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for (Codec c : codecs) {
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for (Format mf : c.getOutputFormats(null)) {
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if (mf.matches(matchFormat)) {
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if (inputMediaFormat.matchesWithout(mf, MimeTypeKey)) {
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// add matching formats first
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formats.add(0, mf.append(inputMediaFormat));
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matchingCount++;
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} else if (inputMediaFormat.matchesWithout(mf, MimeTypeKey, EncodingKey)) {
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// add formats which match everything but the encoding second
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formats.add(matchingCount, mf.append(inputMediaFormat));
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} else {
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// add remaining formats last
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formats.add(mf.append(inputMediaFormat));
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}
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}
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}
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}
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// remove duplicates
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for (int i = formats.size() - 1; i >= 0; i--) {
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Format fi = formats.get(i);
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for (int j = i - 1; j >= 0; j--) {
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Format fj = formats.get(j);
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if (fi.matches(fj)) {
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formats.remove(i);
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break;
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}
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}
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}
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return formats;
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}
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public abstract void unregisterCodec(String codecClass);
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}
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