Cache for frame grabbing

Implemetented a cache for hovering over movies, saving the pictures from
ffmpeg. For that SmGlobals got a new member *frameCache, handling all
the dirty file access.

I first tried to implement it as a helper, but that produced too much
duplicate code.

1 files changed, 25 insertions, 0 deletions

diff --git a/smglobals.h b/smglobals.h
index 06d7b43..b994b53 100644
--- a/smglobals.h
+++ b/smglobals.h
@@ -10,17 +10,41 @@
 
 #include <QHash>
 #include <QSize>
+#include <QPair>
 
 class QAbstractItemModel;
 class PictureViewer;
+class QPixmap;
 
 class SmGlobals : public QObject {
 	Q_OBJECT
 	public:
+		class FrameCache : public QObject {
+			public:
+				FrameCache(QObject *parent = 0);
+				~FrameCache();
+				void readConfig();
+				const QPixmap entry(const QString &sourcePath, const QString &when = QString());
+
+			private:
+				void readCache();
+				void grabFrame(const QString &sourceFile, QString when);
+				QHash<QPair<QString, QString>, QString> mFrameCache;
+				const qint32 mMagic;
+				const QString mCacheSubDir;
+				const QString mCacheFileName;
+				QString mCacheDir;
+				QString mCacheFile;
+				QString mWhen;
+				QString mFfMpegPath;
+
+		};
+
 		~SmGlobals();
 		static SmGlobals *instance();
 		QAbstractItemModel *model(const QString &which);
 		PictureViewer *pictureViewer();
+		FrameCache *frameCache();
 		QSize cursorSize();
 
 	private:
@@ -30,6 +54,7 @@ class SmGlobals : public QObject {
 		static SmGlobals *mInstance;
 		QHash<QString, QAbstractItemModel*> mModels;
 		PictureViewer *mPictureViewer;
+		SmGlobals::FrameCache *mFrameCache;
 		QSize mCursorSize;
 };