finalized very, very basic OTIO support

Ironed out various project and footage loading issues, and a single
cache invalidation issue.

app/render/backend/renderbackend.cpp

@@ -46,7 +46,8 @@ RenderBackend::RenderBackend(QObject *parent) :
   generate_audio_previews_(false),
   render_mode_(RenderMode::kOnline),
   autocache_has_changed_(false),
-  use_custom_autocache_range_(false)
+  use_custom_autocache_range_(false),
+  ignore_next_mouse_button_(false)
 {
   instance_lock_.lock();
   instances_.append(this);
@@ -258,6 +259,11 @@ void RenderBackend::SetAudioParams(const AudioParams &params)
   audio_params_ = params;
 }
 
+void RenderBackend::IgnoreNextMouseButton()
+{
+  ignore_next_mouse_button_ = true;
+}
+
 std::list<TimeRange> RenderBackend::SplitRangeIntoChunks(const TimeRange &r)
 {
   // FIXME: Magic number
@@ -523,7 +529,8 @@ void RenderBackend::AutoCacheVideoInvalidated(const TimeRange &range)
   ClearVideoQueue();
 
   // Hash these frames since that should be relatively quick.
-  if (!(qApp->mouseButtons() & Qt::LeftButton)) {
+  if (ignore_next_mouse_button_ || !(qApp->mouseButtons() & Qt::LeftButton)) {
+    ignore_next_mouse_button_ = false;
     RenderTicketWatcher* watcher = new RenderTicketWatcher();
     QVector<rational> frames = viewer_node_->video_frame_cache()->GetFrameListFromTimeRange({range});
     autocache_hash_tasks_.insert(watcher, frames);

app/render/backend/renderbackend.h

@@ -141,6 +141,8 @@ public:
     video_download_matrix_ = mat;
   }
 
+  void IgnoreNextMouseButton();
+
   static std::list<TimeRange> SplitRangeIntoChunks(const TimeRange& r);
 
 public slots:
@@ -223,6 +225,8 @@ private:
 
   QVector<QByteArray> autocache_currently_caching_hashes_;
 
+  bool ignore_next_mouse_button_;
+
 private slots:
   void WorkerFinished();
 

app/render/playbackcache.h

@@ -39,24 +39,16 @@ public:
   {
   }
 
-  void Invalidate(const TimeRange& r);
-
-  void InvalidateAll();
-
   const rational& GetLength()
   {
     return length_;
   }
 
-  void SetLength(const rational& r);
-
   bool IsFullyValidated()
   {
     return invalidated_.isEmpty();
   }
 
-  void Shift(const rational& from, const rational& to);
-
   const TimeRangeList& GetInvalidatedRanges()
   {
     return invalidated_;
@@ -69,6 +61,15 @@ public:
 
   QString GetCacheDirectory() const;
 
+public slots:
+  void Invalidate(const TimeRange& r);
+
+  void InvalidateAll();
+
+  void SetLength(const rational& r);
+
+  void Shift(const rational& from, const rational& to);
+
 signals:
   void Invalidated(const OLIVE_NAMESPACE::TimeRange& r);