X-Git-Url: https://main.carlh.net/gitweb/?p=dcpomatic.git;a=blobdiff_plain;f=src%2Flib%2Fimage_proxy.h;h=08516e718bb4dbfe34ae5f07a81ef16abfe3265b;hp=0fdea48ee06e04d2610332d259c442d53ab9f8ba;hb=8f12e84009d7c2685bb2eeb32665876463d4e6e5;hpb=cb1dfa9ec09af2abf6d10e4bf2764476db83841b

diff --git a/src/lib/image_proxy.h b/src/lib/image_proxy.h
index 0fdea48ee..08516e718 100644
--- a/src/lib/image_proxy.h
+++ b/src/lib/image_proxy.h
@@ -1,19 +1,20 @@
 /*
     Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
-    This program is distributed in the hope that it will be useful,
+    DCP-o-matic is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
@@ -24,22 +25,23 @@
  *  @brief ImageProxy and subclasses.
  */
 
+extern "C" {
+#include <libavutil/pixfmt.h>
+}
+#include <dcp/types.h>
 #include <boost/shared_ptr.hpp>
-#include <boost/filesystem.hpp>
-#include <Magick++.h>
-#include <libxml++/libxml++.h>
+#include <boost/optional.hpp>
+#include <boost/utility.hpp>
 
 class Image;
 class Socket;
-class Log;
 
-namespace cxml {
+namespace xmlpp {
 	class Node;
 }
 
-namespace dcp {
-	class MonoPictureFrame;
-	class StereoPictureFrame;
+namespace cxml {
+	class Node;
 }
 
 /** @class ImageProxy
@@ -50,24 +52,58 @@ namespace dcp {
  *  of happening in a single-threaded decoder.
  *
  *  For example, large TIFFs are slow to decode, so this class will keep
- *  the TIFF data TIFF until such a time that the actual image is needed.
+ *  the TIFF data compressed until the decompressed image is needed.
  *  At this point, the class decodes the TIFF to an Image.
  */
 class ImageProxy : public boost::noncopyable
 {
 public:
-	ImageProxy (boost::shared_ptr<Log> log);
 	virtual ~ImageProxy () {}
 
-	/** @return Image (which must be aligned) */
-	virtual boost::shared_ptr<Image> image () const = 0;
-	virtual void add_metadata (xmlpp::Node *) const = 0;
-	virtual void send_binary (boost::shared_ptr<Socket>) const = 0;
+	struct Result {
+		Result (boost::shared_ptr<Image> image_, int log2_scaling_)
+			: image (image_)
+			, log2_scaling (log2_scaling_)
+			, error (false)
+		{}
+
+		Result (boost::shared_ptr<Image> image_, int log2_scaling_, bool error_)
+			: image (image_)
+			, log2_scaling (log2_scaling_)
+			, error (error_)
+		{}
+
+		/** Image (which will be aligned) */
+		boost::shared_ptr<Image> image;
+		/** log2 of any scaling down that has already been applied to the image;
+		 *  e.g. if the image is already half the size of the original, this value
+		 *  will be 1.
+		 */
+		int log2_scaling;
+		/** true if there was an error during image decoding, otherwise false */
+		bool error;
+	};
 
-protected:
-	boost::shared_ptr<Log> _log;
+	/** @param log Log to write to, or 0.
+	 *  @param size Size that the returned image will be scaled to, in case this
+	 *  can be used as an optimisation.
+	 */
+	virtual Result image (
+		boost::optional<dcp::Size> size = boost::optional<dcp::Size> ()
+		) const = 0;
+
+	virtual void add_metadata (xmlpp::Node *) const = 0;
+	virtual void write_to_socket (boost::shared_ptr<Socket>) const = 0;
+	/** @return true if our image is definitely the same as another, false if it is probably not */
+	virtual bool same (boost::shared_ptr<const ImageProxy>) const = 0;
+	/** Do any useful work that would speed up a subsequent call to ::image().
+	 *  This method may be called in a different thread to image().
+	 *  @return log2 of any scaling down that will be applied to the image.
+	 */
+	virtual int prepare (boost::optional<dcp::Size> = boost::optional<dcp::Size>()) const { return 0; }
+	virtual size_t memory_used () const = 0;
 };
 
-boost::shared_ptr<ImageProxy> image_proxy_factory (boost::shared_ptr<cxml::Node> xml, boost::shared_ptr<Socket> socket, boost::shared_ptr<Log> log);
+boost::shared_ptr<ImageProxy> image_proxy_factory (boost::shared_ptr<cxml::Node> xml, boost::shared_ptr<Socket> socket);
 
 #endif