[Gnash-commit] /srv/bzr/gnash/trunk r10916: Catch up with FPS, at cost of animation smootness (go faster to catch up when late). Fixes A/V sync in movies with streaming sound, like most of Bozzetto's (see Adam.swf for instance)

[Sandro Santilli]

------------------------------------------------------------
revno: 10916
committer: Sandro Santilli <address@hidden>
branch nick: trunk
timestamp: Mon 2009-05-25 15:28:53 +0200
message:
  Catch up with FPS, at cost of animation smootness (go faster to catch up when 
late). Fixes A/V sync in movies with streaming sound, like most of Bozzetto's 
(see Adam.swf for instance)
modified:
  libcore/movie_root.cpp

=== modified file 'libcore/movie_root.cpp'
--- a/libcore/movie_root.cpp    2009-05-14 15:02:29 +0000
+++ b/libcore/movie_root.cpp    2009-05-25 13:28:53 +0000
@@ -1017,20 +1017,23 @@
 
     try {
 
-           if ((now - _lastMovieAdvancement) >= _movieAdvancementDelay)
+        int elapsed = now - _lastMovieAdvancement;
+           if (elapsed >= _movieAdvancementDelay)
            {
             advanced = true;
                    advanceMovie();
-                   // setting to 'now' discards time spent on actual rendering 
and
-                   // action processing.
-                   // if rendering and action processing takes too much time
-                   // we'll always be late here, so FPS will effectively be
-                   // slower. Might add a check here allowing a tolerance
-                   // and printing a warnign when we're later then tolerated...
-                   //
-                   _lastMovieAdvancement = now; // or _vm.getTime(); ?
+
+                   // To catch-up lateness we pretend we advanced when 
+            // was time for it. 
+            // NOTE:
+            //   now - _lastMovieAdvancement
+            // gives you actual lateness in milliseconds
+            //
+            _lastMovieAdvancement += _movieAdvancementDelay;
 
            }
+
+        //log_debug("Latenss: %d", now-_lastMovieAdvancement);
         
         executeAdvanceCallbacks();