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BoofCV is an open source Java library for real-time computer vision and robotics applications.

There is a newer version: 1.1.7

/*
 * Copyright (c) 2011-2017, Peter Abeles. All Rights Reserved.
 *
 * This file is part of BoofCV (http://boofcv.org).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package boofcv.io.wrapper;

import boofcv.io.MediaManager;
import boofcv.io.image.SimpleImageSequence;
import boofcv.io.image.UtilImageIO;
import boofcv.io.video.DynamicVideoInterface;
import boofcv.io.video.VideoInterface;
import boofcv.struct.image.ImageBase;
import boofcv.struct.image.ImageType;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.Reader;
import java.util.HashMap;
import java.util.Map;

/**
 * @author Peter Abeles
 */
public class DefaultMediaManager implements MediaManager {

	public static final DefaultMediaManager INSTANCE = new DefaultMediaManager();

	Map cachedImage = new HashMap<>();
	VideoInterface videoInterface = new DynamicVideoInterface();
	WebcamInterface webcamInterface = new DynamicWebcamInterface();

	@Override
	public Reader openFile(String fileName) {
		try {
			return new FileReader(fileName);
		} catch (FileNotFoundException e) {
			return null;
		}
	}

	@Override
	public BufferedImage openImage(String fileName) {
		
		BufferedImage b = cachedImage.get(fileName);
		
		if( b == null ) {
			b = UtilImageIO.loadImage(fileName);
			
			if( b == null )
				return null;
			
			cachedImage.put(fileName,b);
		}

		// return a copy of the image so that if it is modified strangeness won't happen
		BufferedImage c = new BufferedImage(b.getWidth(),b.getHeight(),b.getType());
		Graphics2D g2 = c.createGraphics();
		g2.drawImage(b,0,0,null);
		return c;
	}

	@Override
	public > SimpleImageSequence
	openVideo(String fileName, ImageType type) {
		return videoInterface.load(fileName, type);
	}

	@Override
	public > SimpleImageSequence openCamera(String device, int width, int height, ImageType imageType) {
		return webcamInterface.open(device,width,height,imageType);
	}
}