Extract common code out into kdm_for_screen()

[dcpomatic.git] / src / lib / filter_graph.h

diff --git a/src/lib/filter_graph.h b/src/lib/filter_graph.h
index 49b78df16949c393b58560b07d52c677ca6c0245..10298cb74297babfebcb03d0ddc377d77591d482 100644 (file)
--- a/src/lib/filter_graph.h
+++ b/src/lib/filter_graph.h
@@ -1,19 +1,20 @@
 /*
-    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2015 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/>.
 
 */
 
@@ -25,9 +26,14 @@
 #define DCPOMATIC_FILTER_GRAPH_H
 
 #include "util.h"
+extern "C" {
+#include <libavfilter/buffersink.h>
+}
 
+struct AVFilterContext;
+struct AVFrame;
 class Image;
-class VideoFilter;
+class Filter;
 
 /** @class FilterGraph
  *  @brief A graph of FFmpeg filters.
@@ -35,17 +41,23 @@ class VideoFilter;
 class FilterGraph : public boost::noncopyable
 {
 public:
-       FilterGraph (boost::shared_ptr<const FFmpegContent> content, libdcp::Size s, AVPixelFormat p);
-       ~FilterGraph ();
+       FilterGraph ();
+       virtual ~FilterGraph ();
+
+       void setup (std::vector<Filter const *>);
+       AVFilterContext* get (std::string name);
 
-       bool can_process (libdcp::Size s, AVPixelFormat p) const;
-       std::list<std::pair<boost::shared_ptr<Image>, int64_t> > process (AVFrame * frame);
+protected:
+       virtual std::string src_parameters () const = 0;
+       virtual std::string src_name () const = 0;
+       virtual void* sink_parameters () const = 0;
+       virtual std::string sink_name () const = 0;
 
-private:
+       AVFilterGraph* _graph;
+       /** true if this graph has no filters in, so it just copies stuff straight through */
+       bool _copy;
        AVFilterContext* _buffer_src_context;
        AVFilterContext* _buffer_sink_context;
-       libdcp::Size _size; ///< size of the images that this chain can process
-       AVPixelFormat _pixel_format; ///< pixel format of the images that this chain can process
        AVFrame* _frame;
 };