MOHAWK: Add a method to get a video handle from a MystAreaVideo

Use it to fix the fortress rotation controls once more

3 files changed, 19 insertions, 3 deletions

diff --git a/engines/mohawk/myst_areas.cpp b/engines/mohawk/myst_areas.cpp
index 193def2a32..4b9cf546fa 100644
--- a/engines/mohawk/myst_areas.cpp
+++ b/engines/mohawk/myst_areas.cpp
@@ -251,6 +251,20 @@ VideoHandle MystAreaVideo::playMovie() {
 	return handle;
 }
 
+VideoHandle MystAreaVideo::getMovieHandle() {
+	// If the video is already in the manager, just return the handle
+	VideoHandle handle = _vm->_video->findVideoHandle(_videoFile);
+	if (!handle) {
+		// If the video has not been loaded yet, do it but don't start playing it
+		handle = _vm->_video->playMovie(_videoFile);
+		if (!handle)
+			error("Failed to open '%s'", _videoFile.c_str());
+		handle->stop();
+	}
+
+	return handle;
+}
+
 void MystAreaVideo::handleCardChange() {
 	if (_playOnCardChange)
 		playMovie();
diff --git a/engines/mohawk/myst_areas.h b/engines/mohawk/myst_areas.h
index 09ec6a2742..b19a2df9e2 100644
--- a/engines/mohawk/myst_areas.h
+++ b/engines/mohawk/myst_areas.h
@@ -108,6 +108,8 @@ public:
 	MystAreaVideo(MohawkEngine_Myst *vm, Common::SeekableReadStream *rlstStream, MystArea *parent);
 
 	VideoHandle playMovie();
+	VideoHandle getMovieHandle();
+
 	void handleCardChange() override;
 	bool isPlaying();
 	void setDirection(int16 direction) { _direction = direction; }
diff --git a/engines/mohawk/myst_stacks/mechanical.cpp b/engines/mohawk/myst_stacks/mechanical.cpp
index 3214c643a5..3324c9a22d 100644
--- a/engines/mohawk/myst_stacks/mechanical.cpp
+++ b/engines/mohawk/myst_stacks/mechanical.cpp
@@ -667,7 +667,7 @@ void Mechanical::o_elevatorTopMovie(uint16 op, uint16 var, uint16 argc, uint16 *
 void Mechanical::o_fortressRotationSetPosition(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
 	debugC(kDebugScript, "Opcode %d: Set fortress position", op);
 
-	VideoHandle gears = _fortressRotationGears->playMovie();
+	VideoHandle gears = _fortressRotationGears->getMovieHandle();
 	uint32 moviePosition = Audio::Timestamp(gears->getTime(), 600).totalNumberOfFrames();
 
 	// Myst ME short movie workaround, explained in o_fortressRotation_init
@@ -801,7 +801,7 @@ void Mechanical::o_elevatorRotation_init(uint16 op, uint16 var, uint16 argc, uin
 }
 
 void Mechanical::fortressRotation_run() {
-	VideoHandle gears = _fortressRotationGears->playMovie();
+	VideoHandle gears = _fortressRotationGears->getMovieHandle();
 
 	double oldRate = gears->getRate().toDouble();
 	uint32 moviePosition = Audio::Timestamp(gears->getTime(), 600).totalNumberOfFrames();
@@ -949,7 +949,7 @@ void Mechanical::fortressSimulation_run() {
 
 		_fortressSimulationInit = false;
 	} else {
-		VideoHandle holo = _fortressSimulationHolo->playMovie();
+		VideoHandle holo = _fortressSimulationHolo->getMovieHandle();
 
 		double oldRate = holo->getRate().toDouble();