1 /***************************************************************************
4 begin : Fri Nov 22 2002
5 copyright : (C) 2002 by Jason Wood
6 email : jasonwood@blueyonder.co.uk
7 ***************************************************************************/
9 /***************************************************************************
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
16 ***************************************************************************/
23 #include <QDomElement>
27 #include <kdeversion.h>
29 #include <mlt++/Mlt.h>
32 /**KRender encapsulates the client side of the interface to a renderer.
33 From Kdenlive's point of view, you treat the KRender object as the
34 renderer, and simply use it as if it was local. Calls are asyncrhonous -
35 you send a call out, and then receive the return value through the
36 relevant signal that get's emitted once the call completes.
52 typedef QMap <int, QMap <int, QByteArray> > audioByteArray;
54 class KThumb: public QObject
59 KThumb(ClipManager *clipManager, KUrl url, const QString &id, const QString &hash, QObject * parent = 0, const char *name = 0);
61 void setProducer(Mlt::Producer *producer);
62 void askForAudioThumbs(const QString &id);
63 bool hasProducer() const;
65 void updateThumbUrl(const QString &hash);
66 void extractImage(int frame, int frame2);
67 QPixmap extractImage(int frame, int width, int height);
68 #if KDE_IS_VERSION(4,5,0)
69 /** @brief Request thumbnails for the frame range. */
70 void queryIntraThumbs(QList <int> missingFrames);
71 /** @brief Query cached thumbnail. */
72 QImage findCachedThumb(const QString path);
76 void updateClipUrl(KUrl url, const QString &hash);
77 static QPixmap getImage(KUrl url, int width, int height);
78 // static QPixmap getImage(QDomElement xml, int frame, int width, int height);
79 /* void getImage(KUrl url, int frame, int width, int height);
80 void getThumbs(KUrl url, int startframe, int endframe, int width, int height);*/
81 void stopAudioThumbs();
82 void removeAudioThumb();
83 void getAudioThumbs(int channel, double frame, double frameLength, int arrayWidth);
84 static QPixmap getImage(KUrl url, int frame, int width, int height);
85 static QImage getFrame(Mlt::Producer *producer, int framepos, int frameWidth, int displayWidth, int height);
86 static QImage getFrame(Mlt::Frame *frame, int frameWidth, int displayWidth, int height);
87 /** @brief Calculates image variance, useful to know if a thumbnail is interesting.
88 * @return an integer between 0 and 100. 0 means no variance, eg. black image while bigger values mean contrasted image
90 static uint imageVariance(QImage image);
93 void slotAudioThumbOver();
94 void slotCreateAudioThumbs();
95 #if KDE_IS_VERSION(4,5,0)
96 /** @brief Fetch all requested frames. */
97 void slotGetIntraThumbs();
101 QFuture<void> m_audioThumbProducer;
106 Mlt::Producer *m_producer;
107 ClipManager *m_clipManager;
109 QList <int> m_requestedThumbs;
110 /** @brief Controls the thumbnails process. */
111 QFuture<void> m_future;
112 /** @brief Controls the intra frames thumbnails process (cached thumbnails). */
113 QFuture<void> m_intra;
114 QFile m_audioThumbFile;
115 bool m_stopAudioThumbs;
117 double m_frameLength;
121 /** @brief List of frame numbers from which we want to extract thumbnails. */
122 QList <int> m_intraFramesQueue;
126 QImage getProducerFrame(int framepos, int frameWidth, int displayWidth, int height);
129 void thumbReady(int, QImage);
130 void mainThumbReady(const QString &, QPixmap);
131 void audioThumbReady(const audioByteArray&);
132 /** @brief We have finished caching all requested thumbs. */