Adding new GetFrames method to CacheBase, to return an ordered vector of Frame objects. Useful when needing to iterate through the current cached frames.

src/CacheMemory.cpp

@@ -152,6 +152,23 @@ std::shared_ptr<Frame> CacheMemory::GetFrame(int64_t frame_number)
 		return std::shared_ptr<Frame>();
 }
 
+// @brief Get an array of all Frames
+std::vector<std::shared_ptr<openshot::Frame>> CacheMemory::GetFrames()
+{
+    // Create a scoped lock, to protect the cache from multiple threads
+    const std::lock_guard<std::recursive_mutex> lock(*cacheMutex);
+
+    std::vector<std::shared_ptr<openshot::Frame>> all_frames;
+    std::vector<int64_t>::iterator itr_ordered;
+    for(itr_ordered = ordered_frame_numbers.begin(); itr_ordered != ordered_frame_numbers.end(); ++itr_ordered)
+    {
+        int64_t frame_number = *itr_ordered;
+        all_frames.push_back(GetFrame(frame_number));
+    }
+
+    return all_frames;
+}
+
 // Get the smallest frame number (or NULL shared_ptr if no frame is found)
 std::shared_ptr<Frame> CacheMemory::GetSmallestFrame()
 {