+ uint64_t offset;
+ uint64_t size;
+ std::string hash;
+};
+
+/** A helper class for writing to MonoPictureAssets progressively (i.e. writing frame-by-frame,
+ * rather than giving libdcp all the frames in one go).
+ *
+ * Objects of this class can only be created with MonoPictureAsset::start_write().
+ *
+ * Frames can be written to the MonoPictureAsset by calling write() with a JPEG2000 image
+ * (a verbatim .j2 file). finalize() must be called after the last frame has been written.
+ * The action of finalize() can't be done in MonoPictureAssetWriter's destructor as it may
+ * throw an exception.
+ */
+class MonoPictureAssetWriter
+{
+public:
+ FrameInfo write (uint8_t* data, int size);
+ void fake_write (int size);
+ void finalize ();
+
+private:
+ friend class MonoPictureAsset;
+
+ MonoPictureAssetWriter (MonoPictureAsset *, bool, MXFMetadata const &);
+ void start (uint8_t *, int);
+
+ /* no copy construction */
+ MonoPictureAssetWriter (MonoPictureAssetWriter const &);
+ MonoPictureAssetWriter& operator= (MonoPictureAssetWriter const &);
+
+ /* do this with an opaque pointer so we don't have to include
+ ASDCP headers
+ */
+
+ struct ASDCPState;
+ boost::shared_ptr<ASDCPState> _state;
+
+ MonoPictureAsset* _asset;
+ /** Number of picture frames written to the asset so far */
+ int _frames_written;
+ bool _started;
+ /** true if finalize() has been called */
+ bool _finalized;
+ bool _overwrite;
+ MXFMetadata _metadata;