/*
- 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 ~FilterGraph () {}
- virtual bool can_process (libdcp::Size, AVPixelFormat) const = 0;
- virtual std::list<boost::shared_ptr<Image> > process (AVFrame *) = 0;
-};
+#include <dcp/warnings.h>
+LIBDCP_DISABLE_WARNINGS
+extern "C" {
+#include <libavfilter/buffersink.h>
+}
+LIBDCP_ENABLE_WARNINGS
+#include <string>
+#include <vector>
-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