C++11 tidying.

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

diff --git a/src/lib/filter_graph.h b/src/lib/filter_graph.h
index 2138943e42b6e3e6ef11ba4967f0c85f0755d618..9ee628d4cd097fa9b2bae97e08ac793986be4261 100644 (file)
--- a/src/lib/filter_graph.h
+++ b/src/lib/filter_graph.h
@@ -1,72 +1,76 @@
 /*
-    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2021 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/>.
 
 */
 
+
 /** @file src/lib/filter_graph.h
  *  @brief A graph of FFmpeg filters.
  */
 
-#ifndef DVDOMATIC_FILTER_GRAPH_H
-#define DVDOMATIC_FILTER_GRAPH_H
 
-#include "util.h"
+#ifndef DCPOMATIC_FILTER_GRAPH_H
+#define DCPOMATIC_FILTER_GRAPH_H
 
-class Image;
-class VideoFilter;
-class FFmpegDecoder;
 
-class FilterGraph
-{
-public:
-       virtual bool can_process (libdcp::Size, AVPixelFormat) const = 0;
-       virtual std::list<boost::shared_ptr<Image> > process (AVFrame *) = 0;
-};
+#include "util.h"
+#include "warnings.h"
+DCPOMATIC_DISABLE_WARNINGS
+extern "C" {
+#include <libavfilter/buffersink.h>
+}
+DCPOMATIC_ENABLE_WARNINGS
 
-class EmptyFilterGraph : public FilterGraph
-{
-public:
-       bool can_process (libdcp::Size, AVPixelFormat) const {
-               return true;
-       }
 
-       std::list<boost::shared_ptr<Image> > process (AVFrame *);
-};
+struct AVFilterContext;
+struct AVFrame;
+class Image;
+class Filter;
+
 
-/** @class FFmpegFilterGraph
+/** @class FilterGraph
  *  @brief A graph of FFmpeg filters.
  */
-class FFmpegFilterGraph : public FilterGraph
+class FilterGraph
 {
 public:
-       FFmpegFilterGraph (boost::shared_ptr<Film> film, FFmpegDecoder* decoder, libdcp::Size s, AVPixelFormat p);
-       ~FFmpegFilterGraph ();
-
-       bool can_process (libdcp::Size s, AVPixelFormat p) const;
-       std::list<boost::shared_ptr<Image> > process (AVFrame * frame);
-
-private:
-       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;
+       FilterGraph() = default;
+       virtual ~FilterGraph ();
+
+       FilterGraph (FilterGraph const&) = delete;
+       FilterGraph& operator== (FilterGraph const&) = delete;
+
+       void setup (std::vector<Filter const *>);
+       AVFilterContext* get (std::string name);
+
+protected:
+       virtual std::string src_parameters () const = 0;
+       virtual std::string src_name () const = 0;
+       virtual void set_parameters (AVFilterContext* context) const = 0;
+       virtual std::string sink_name () const = 0;
+
+       AVFilterGraph* _graph = nullptr;
+       /** true if this graph has no filters in, so it just copies stuff straight through */
+       bool _copy = false;
+       AVFilterContext* _buffer_src_context = nullptr;
+       AVFilterContext* _buffer_sink_context = nullptr;
+       AVFrame* _frame = nullptr;
 };
 
-boost::shared_ptr<FilterGraph> filter_graph_factory (boost::shared_ptr<Film>, FFmpegDecoder *, libdcp::Size, AVPixelFormat);
 
 #endif