New Timeline class to manage segments of media player.

Timeline.h

@@ -0,0 +1,98 @@
+#ifndef TIMELINE_H
+#define TIMELINE_H
+
+#include <string>
+#include <sstream>
+#include <set>
+#include <list>
+
+#include <gst/pbutils/pbutils.h>
+
+struct MediaSegment
+{
+    GstClockTime begin;
+    GstClockTime end;
+
+    MediaSegment()
+    {
+        begin = GST_CLOCK_TIME_NONE;
+        end = GST_CLOCK_TIME_NONE;
+    }
+
+    MediaSegment(GstClockTime b, GstClockTime e)
+    {
+        if ( b < e ) {
+            begin = b;
+            end = e;
+        } else {
+            begin = GST_CLOCK_TIME_NONE;
+            end = GST_CLOCK_TIME_NONE;
+        }
+    }
+    inline bool is_valid() const
+    {
+        return begin != GST_CLOCK_TIME_NONE && end != GST_CLOCK_TIME_NONE && begin < end;
+    }
+    inline bool operator < (const MediaSegment b) const
+    {
+        return (this->is_valid() && b.is_valid() && this->end < b.begin);
+    }
+    inline bool operator == (const MediaSegment b) const
+    {
+        return (this->begin == b.begin && this->end == b.end);
+    }
+    inline bool operator != (const MediaSegment b) const
+    {
+        return (this->begin != b.begin || this->end != b.end);
+    }
+};
+
+struct containsTime: public std::unary_function<MediaSegment, bool>
+{
+    inline bool operator()(const MediaSegment s) const
+    {
+       return ( s.is_valid() && _t > s.begin && _t < s.end );
+    }
+
+    containsTime(GstClockTime t) : _t(t) { }
+
+private:
+    GstClockTime _t;
+};
+
+
+typedef std::set<MediaSegment> MediaSegmentSet;
+
+
+class Timeline
+{
+public:
+    Timeline();
+    ~Timeline();
+
+    void reset();
+    void init(GstClockTime start, GstClockTime end, GstClockTime frame_duration);
+
+    bool addPlaySegment(GstClockTime begin, GstClockTime end);
+    bool addPlaySegment(MediaSegment s);
+    bool removePlaySegmentAt(GstClockTime t);
+    bool removeAllPlaySegmentOverlap(MediaSegment s);
+    std::list< std::pair<guint64, guint64> > getPlaySegments() const;
+
+    inline float *Array() { return array_; }
+    inline size_t ArraySize() { return array_size_; }
+
+private:
+
+    GstClockTime start_;
+    GstClockTime end_;
+    size_t num_frames_;
+
+    float *array_;
+    size_t array_size_;
+    MediaSegmentSet segments_;
+    MediaSegmentSet::iterator current_segment_;
+
+};
+
+#endif // TIMELINE_H