package com.aurellem.capture.video;

 

 import java.awt.image.BufferedImage;

 import java.io.File;

 import java.io.IOException;

 import java.nio.ByteBuffer;

 

 import com.aurellem.capture.IsoTimer;

 import com.jme3.app.Application;

 import com.jme3.app.state.AppState;

 import com.jme3.app.state.AppStateManager;

 import com.jme3.post.SceneProcessor;

 import com.jme3.renderer.Camera;

 import com.jme3.renderer.RenderManager;

 import com.jme3.renderer.ViewPort;

 import com.jme3.renderer.queue.RenderQueue;

 import com.jme3.texture.FrameBuffer;

 import com.jme3.util.BufferUtils;

 import com.jme3.util.Screenshots;

 

 /**

  * <code>VideoRecorder</code> copies the frames it receives to video. 

  * To ensure smooth video at a constant framerate, you should set your 

  * application's timer to a new <code>IsoTimer</code>.  This class will 

  * auto-determine the framerate of the video based on the time difference 

  * between the first two frames it receives, although you can manually set 

  * the framerate by calling <code>setFps(newFramerate)</code>.  Be sure to 

  * place this processor *after* any other processors whose effects you want 

  * to be included in the output video. You can attach multiple 

  * <code>VideoProcessor</code>s to the same <code>ViewPort</code>.

  * 

  * For example,

  * <code>

  * someViewPort.addProcessor(new VideoProcessor(file1));

  * someViewPort.addProcessor(someShadowRenderer);

  * someViewPort.addProcessor(new VideoProcessor(file2));

  * </code>

  * 

  * will output a video without shadows to <code>file1</code> and a video 

  * with shadows to <code>file2</code>

  * 

  * @author Robert McIntyre

  *

  */

 

 public abstract class AbstractVideoRecorder 

 	implements SceneProcessor, VideoRecorder, AppState{

 

 	final File output;

 	Camera camera;

 	int width;

 	int height;

 	String targetFileName;

 	FrameBuffer frameBuffer;

 	Double fps = null;

 	RenderManager renderManager;

 	ByteBuffer byteBuffer;

 	BufferedImage rawFrame;

 	boolean isInitilized = false;

 	boolean paused = false;

 	

 	public AbstractVideoRecorder(File output) throws IOException {

 		this.output = output;

 		this.targetFileName = this.output.getCanonicalPath();	

 	}

 	

 		

 	public double getFps() {return this.fps;}

 	

 	public AbstractVideoRecorder setFps(double fps) {

 		this.fps = fps;

 		return this;

 	}

 	

 	public void initialize(RenderManager rm, ViewPort viewPort) {

 		Camera camera = viewPort.getCamera();

 		this.width = camera.getWidth();

 		this.height = camera.getHeight();

 				

 		rawFrame = new BufferedImage(width, height, 

 				BufferedImage.TYPE_4BYTE_ABGR);		

 		byteBuffer = BufferUtils.createByteBuffer(width * height * 4 );

 		this.renderManager = rm;

 		this.isInitilized = true;

 	}

 

 	public void reshape(ViewPort vp, int w, int h) {}

 	

 	public boolean isInitialized() {return this.isInitilized;}

 

 	public void preFrame(float tpf) {

 		if (null == this.fps){

 			this.setFps(1.0 / tpf);}

 	}	

 	

 	public void postQueue(RenderQueue rq) {}

 

 	public void postFrame(FrameBuffer out) {

 		if (!this.paused){

 			byteBuffer.clear();

 			renderManager.getRenderer().readFrameBuffer(out, byteBuffer);

 			Screenshots.convertScreenShot(byteBuffer, rawFrame);

 			record(rawFrame);

 		}

 	}

 			

 	public void cleanup(){

 		this.pause();

 		this.finish();

 	};

 	

 	public void pause(){

 		this.paused = true;

 	}

 	

 	public void start(){

 		this.paused = false;

 	}

 

 	// methods from AppState

 	public void initialize(AppStateManager stateManager, Application app) {}

 

 	public void setEnabled(boolean active) {

 		if (active) {this.start();}

 		else {this.pause();}

 	}

 

 	public boolean isEnabled() {

 		return this.paused;

 	}

 

 	public void stateAttached(AppStateManager stateManager) {}

 

 

 	public void stateDetached(AppStateManager stateManager) {

 		this.pause();

 		this.finish();

 	}

 

 	public void update(float tpf) {}	

 	public void render(RenderManager rm) {}

 	public void postRender() {}

 	

 }