import java.io.*;


public class MPlayerTV
{
	private static boolean firstPlay = true;
	private static OutputStreamWriter out;


	public static void main(String[] args) throws Exception
	{
		String[] cmd = new String[] {
				"mplayer.exe",
				"-quiet",
				"-identify",
				"-slave",
				"-loop", "0",
				"stream.dump"
			};

		Process p = Runtime.getRuntime().exec(cmd);
		(new MiniLogger(p.getErrorStream(), true)).start();
		(new MiniLogger(p.getInputStream(), false)).start();
		out = new OutputStreamWriter(p.getOutputStream());
	}

	private static class MiniLogger extends Thread
	{
		private BufferedReader br;
		private boolean isError;


		public MiniLogger(InputStream is, boolean isError)
		{
			br = new BufferedReader(new InputStreamReader(is));
			this.isError = isError;
		}

		public void run()
		{
			try
			{
				for(String s=br.readLine(); s != null; s=br.readLine())
				{
					if(isError)
					{
						System.err.println(s);
					} else
					{
						System.out.println("read: " + s);

						if(s.startsWith("ID_LENGTH="))
						{
							if(firstPlay)
							{
								firstPlay = false;
							} else
							{
								float length = Float.parseFloat(s.substring(10)) - 3;
								String cmd = "seek " + length + " 2";

								out.write(cmd);
								out.write("\n");
								out.flush();

								System.out.println("sent: " + cmd);
							}
						}
					}
				}
			} catch(Exception ex)
			{
				ex.printStackTrace();
			}
		}
	}
}