Added a blocking method to wait for available new bits.

MediaImpl.cpp

@@ -1010,3 +1010,23 @@ void MediaImpl::unlockMutex()
   _mutexLocker->unlock();
 }
 
+bool MediaImpl::waitForNextBits(int timeout, const uchar** bits)
+{
+  QTime time;
+  time.start();
+  while (time.elapsed() < timeout)
+  {
+    // Bits available.
+    if (hasBits() && bitsHaveChanged())
+    {
+      if (bits)
+        *bits = getBits();
+      return true;
+    }
+  }
+
+  // Timed out.
+  return false;
+}
+
+

MediaImpl.h

@@ -191,6 +191,9 @@ public:
   /// Unlocks mutex (default = no effect).
   void unlockMutex();
 
+  /// Wait until first data samples are available (blocking).
+  bool waitForNextBits(int timeout, const uchar** bits=0);
+
 private:
   //locals
 
@@ -232,7 +235,6 @@ private:
    */
   GSource *_pollSource;
 
-
   /// Raw image data of the last video frame.
   uchar *_data;