libtriple: add video parameter watchdog

Add the video parameter watchdog to the (already existing) input
thread, so we can remove it from zapit.
Unfortunately, we need an ugly hack in cDemux for making sure we
do not crash on exit... :-(


Origin commit data
------------------
Commit: a18737ffde
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2012-01-14 (Sat, 14 Jan 2012)

lib/libtriple/lt_dfbinput.cpp

@@ -39,6 +39,10 @@
 #include <directfb.h>
 #include "lt_dfbinput.h"
 
+/* needed for videodecoder watchdog */
+#include "video_td.h"
+extern cVideo *videoDecoder;
+
 /* same defines as in neutrino's rcinput.h */
 #define KEY_TTTV	KEY_FN_1
 #define KEY_TTZOOM	KEY_FN_2
@@ -245,7 +249,12 @@ static void *input_thread(void *data)
 	thread_running = 1;
 	while (thread_running)
 	{
-		if (events->WaitForEventWithTimeout(events, 1, 0) == DFB_TIMEOUT)
+		/* check every 250ms (if a key is pressed on remote, we might
+		 * even check earlier, but it does not really hurt... */
+		if (videoDecoder)
+			videoDecoder->VideoParamWatchdog();
+
+		if (events->WaitForEventWithTimeout(events, 0, 250) == DFB_TIMEOUT)
 			continue;
 		DFBInputEvent e;
 		while (events->GetEvent(events, DFB_EVENT(&e)) == DFB_OK)