package main;

import java.nio.ByteBuffer;

import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;

import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.opengl.GL12.GL_CLAMP_TO_EDGE;

import uk.co.caprica.vlcj.player.MediaPlayerFactory;
import uk.co.caprica.vlcj.player.direct.DirectMediaPlayer;
import uk.co.caprica.vlcj.player.direct.RenderCallback;

import com.sun.jna.Memory;
 
public class VLCJinLWJGL implements RenderCallback {
   
   private static final int WIDTH = 1280, HEIGHT = 544;
   
   private MediaPlayerFactory mediaPlayerFactory;
    private DirectMediaPlayer mediaPlayer;
    
    private int texture;
    
    private ByteBuffer buffer = null;
    
    public static void main(String[] argv)
   {
      new VLCJinLWJGL().updateLoop();
   }
   
   public VLCJinLWJGL()
   {
      System.setProperty("jna.library.path", "vlib");

      initGL();
      
       if (isMac())
          mediaPlayerFactory = new MediaPlayerFactory(new String[] {"--no-video-title-show", "--vout=macosx"});
       else
          mediaPlayerFactory = new MediaPlayerFactory(new String[] {"--no-video-title-show"});
       
        mediaPlayer = mediaPlayerFactory.newDirectMediaPlayer("RGBA", WIDTH, HEIGHT, WIDTH * 4, this);
        mediaPlayer.playMedia("inception-trailer-cut.ogv");
        Display.setTitle("VLCJ - LWJGL - "+mediaPlayer.getMediaMeta().getTitle());
    }

 
   private void initGL() {
      try {
         Display.setDisplayMode(new DisplayMode(WIDTH, HEIGHT));
         Display.create();
         //Display.setVSyncEnabled(true);
      } catch (LWJGLException e) {
         e.printStackTrace();
         System.exit(0);
      }          
 
      glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
 
      glMatrixMode(GL_PROJECTION);
      glLoadIdentity();
      glOrtho(0, WIDTH, HEIGHT, 0, 1, -1);
      glMatrixMode(GL_MODELVIEW);
 
      glEnable(GL_TEXTURE_2D);     
      
      texture = glGenTextures();
      glBindTexture(GL_TEXTURE_2D, texture);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, WIDTH, HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, (ByteBuffer)null);
   }
    
    public static boolean isMac()
    {
       return (System.getProperty("os.name").toLowerCase().indexOf( "mac" ) >= 0); 
   }
    
   public void updateLoop()
   {
      while (!Display.isCloseRequested())      {
         
         glClear(GL_COLOR_BUFFER_BIT);
         
         glBindTexture(GL_TEXTURE_2D, texture);
         if(buffer != null){
            glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, WIDTH, HEIGHT, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
         }
         
         glBegin(GL_QUADS);
         {
            glTexCoord2f(0, 0);
            glVertex2f(0, 0);
            
            glTexCoord2f(1, 0);
            glVertex2f(WIDTH, 0);
            
            glTexCoord2f(1, 1);
            glVertex2f(WIDTH, HEIGHT);
            
            glTexCoord2f(0, 1);
            glVertex2f(0, HEIGHT);
         }
         glEnd();
 
         Display.update();
      }
      
      mediaPlayer.stop();
          mediaPlayer.release();
          mediaPlayerFactory.release();
          mediaPlayerFactory = null;
          mediaPlayer = null;
 
      Display.destroy();
   }
   
   @Override
   public void display(Memory memory)
   {
      buffer = memory.getByteBuffer(0, WIDTH * HEIGHT * 4);
   }
}