Adding a getFrameWaitTime() method to get the frame waiting time instead of directly waiting

svn-id: r46712

2 files changed, 15 insertions, 4 deletions

diff --git a/graphics/video/coktelvideo/coktelvideo.cpp b/graphics/video/coktelvideo/coktelvideo.cpp
index 95b12528c0..c2fcea8933 100644
--- a/graphics/video/coktelvideo/coktelvideo.cpp
+++ b/graphics/video/coktelvideo/coktelvideo.cpp
@@ -452,10 +452,10 @@ CoktelVideo::State Imd::nextFrame() {
 	return processFrame(_curFrame);
 }
 
-void Imd::waitEndFrame() {
+uint32 Imd::getFrameWaitTime() {
 	if (_soundEnabled && _hasSound) {;
 		if (_soundStage != 2)
-			return;
+			return 0;
 
 		if (_skipFrames == 0) {
 			int32 waitTime = (int16) (((_curFrame * _soundSliceLength) -
@@ -465,12 +465,20 @@ void Imd::waitEndFrame() {
 				_skipFrames = -waitTime / (_soundSliceLength >> 16);
 				warning("Video A/V sync broken, skipping %d frame(s)", _skipFrames + 1);
 			} else if (waitTime > 0)
-				g_system->delayMillis(waitTime);
+				return waitTime;
 
 		} else
 			_skipFrames--;
 	} else
-		g_system->delayMillis(_frameLength);
+		return _frameLength;
+
+	return 0;
+}
+
+void Imd::waitEndFrame() {
+	uint32 waitTime = getFrameWaitTime();
+	if (waitTime > 0)
+		g_system->delayMillis(waitTime);
 }
 
 void Imd::copyCurrentFrame(byte *dest,
diff --git a/graphics/video/coktelvideo/coktelvideo.h b/graphics/video/coktelvideo/coktelvideo.h
index cf325d7c7b..b0f38186a2 100644
--- a/graphics/video/coktelvideo/coktelvideo.h
+++ b/graphics/video/coktelvideo/coktelvideo.h
@@ -184,6 +184,8 @@ public:
 
 	/** Render the next frame. */
 	virtual State nextFrame() = 0;
+	/** Get the time in ms until the next frame can be displayed. Already includes A/V sync measures. */
+	virtual uint32 getFrameWaitTime() = 0;
 	/** Wait for the frame to end. */
 	virtual void waitEndFrame() = 0;
 
@@ -252,6 +254,7 @@ public:
 	void seekFrame(int32 frame, int16 whence = SEEK_SET, bool restart = false);
 
 	State nextFrame();
+	uint32 getFrameWaitTime();
 	void waitEndFrame();
 
 	void copyCurrentFrame(byte *dest,