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
------------------
Branch: master
Commit: e83b77d0e5
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2012-01-14 (Sat, 14 Jan 2012)



------------------
This commit was generated by Migit

libtriple/dmx_td.cpp

@@ -12,6 +12,10 @@
 #include "dmx_td.h"
 #include "lt_debug.h"
 
+/* Ugh... see comment in destructor for details... */
+#include "video_td.h"
+extern cVideo *videoDecoder;
+
 #define lt_debug(args...) _lt_debug(TRIPLE_DEBUG_DEMUX, this, args)
 #define lt_info(args...) _lt_info(TRIPLE_DEBUG_DEMUX, this, args)
 
@@ -60,6 +64,18 @@ cDemux::~cDemux()
 {
 	lt_debug("%s #%d fd: %d\n", __FUNCTION__, num, fd);
 	Close();
+	/* in zapit.cpp, videoDemux is deleted after videoDecoder
+	 * in the video watchdog, we access videoDecoder
+	 * the thread still runs after videoDecoder has been deleted
+	 * => set videoDecoder to NULL here to make the check in the
+	 * watchdog thread pick this up.
+	 * This is ugly, but it saves me from changing neutrino
+	 *
+	 * if the delete order in neutrino will ever be changed, this
+	 * will blow up badly :-(
+	 */
+	if (dmx_type == DMX_VIDEO_CHANNEL)
+		videoDecoder = NULL;
 }
 
 bool cDemux::Open(DMX_CHANNEL_TYPE pes_type, void * /*hVideoBuffer*/, int uBufferSize)

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)