Fix crash when changing project profile

[kdenlive] / src / kthumb.h

diff --git a/src/kthumb.h b/src/kthumb.h
index 892f4d6c7b34bab08cf0a45b8b8a73029c9ebbd1..598cda56e92e0752da4450894d68404123fee1e2 100644 (file)
--- a/src/kthumb.h
+++ b/src/kthumb.h
@@ -20,9 +20,8 @@
 
 #include <QPixmap>
 #include <QFile>
-#include <QThread>
-#include <QMutex>
 #include <QDomElement>
+#include <QFuture>
 
 #include <KUrl>
 
@@ -32,13 +31,14 @@
 /**KRender encapsulates the client side of the interface to a renderer.
 From Kdenlive's point of view, you treat the KRender object as the
 renderer, and simply use it as if it was local. Calls are asyncrhonous -
-you send a call out, and then recieve the return value through the
+you send a call out, and then receive the return value through the
 relevant signal that get's emitted once the call completes.
   *@author Jason Wood
   */
 
 
-namespace Mlt {
+namespace Mlt
+{
 class Miracle;
 class Consumer;
 class Producer;
@@ -48,33 +48,8 @@ class Profile;
 
 class ClipManager;
 
-
-
-class MyThread : public QThread {
-    Q_OBJECT
-public:
-    virtual void run();
-    void init(QObject *parent, KUrl url, QString target, double frame, double frameLength, int frequency, int channels, int arrayWidth);
-    bool isWorking();
-    bool stop_me;
-
-private:
-    QFile f;
-    KUrl m_url;
-    double m_frame;
-    double m_frameLength;
-    int m_frequency;
-    int m_channels;
-    int m_arrayWidth;
-    bool m_isWorking;
-    QObject *m_parent;
-
-signals:
-    void audioThumbProgress(const int);
-    void audioThumbOver();
-};
-
-class KThumb: public QObject {
+class KThumb: public QObject
+{
 Q_OBJECT public:
 
 
@@ -83,6 +58,7 @@ Q_OBJECT public:
     void setProducer(Mlt::Producer *producer);
     void askForAudioThumbs(const QString &id);
     bool hasProducer() const;
+    void clearProducer();
     void updateThumbUrl(const QString &hash);
 
 public slots:
@@ -97,24 +73,37 @@ public slots:
     void removeAudioThumb();
     void getAudioThumbs(int channel, double frame, double frameLength, int arrayWidth);
     static QPixmap getImage(KUrl url, int frame, int width, int height);
-    static QPixmap getFrame(Mlt::Producer *producer, int framepos, int width, int height);
+    static QImage getFrame(Mlt::Producer *producer, int framepos, int width, int height);
+    /** @brief Calculates image variance, useful to know if a thumbnail is interesting. 
+     *  @return an integer between 0 and 100. 0 means no variance, eg. black image while bigger values mean contrasted image
+     * */
+    static uint imageVariance(QImage image);
 
 private slots:
-    void slotAudioThumbProgress(const int progress);
     void slotAudioThumbOver();
+    void slotCreateAudioThumbs();
 
 private:
-    MyThread audioThumbProducer;
+    QFuture<void> m_audioThumbProducer;
     KUrl m_url;
     QString m_thumbFile;
     double m_dar;
     Mlt::Producer *m_producer;
     ClipManager *m_clipManager;
     QString m_id;
-    int m_mainFrame;
+    QList <int> m_requestedThumbs;
+    QFuture<void> m_future;
+    QFile m_audioThumbFile;
+    bool m_stopAudioThumbs;
+    double m_frame;
+    double m_frameLength;
+    int m_frequency;
+    int m_channels;
+    int m_arrayWidth;
+    void doGetThumbs();
 
 signals:
-    void thumbReady(int, QPixmap);
+    void thumbReady(int, QImage);
     void mainThumbReady(const QString &, QPixmap);
     void audioThumbReady(QMap <int, QMap <int, QByteArray> >);
 };