2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /** @file src/lib/filter_graph.h
21 * @brief A graph of FFmpeg filters.
24 #ifndef DVDOMATIC_FILTER_GRAPH_H
25 #define DVDOMATIC_FILTER_GRAPH_H
36 virtual bool can_process (libdcp::Size, AVPixelFormat) const = 0;
37 virtual std::list<boost::shared_ptr<Image> > process (AVFrame *) = 0;
40 class EmptyFilterGraph : public FilterGraph
43 bool can_process (libdcp::Size, AVPixelFormat) const {
47 std::list<boost::shared_ptr<Image> > process (AVFrame *);
50 /** @class FFmpegFilterGraph
51 * @brief A graph of FFmpeg filters.
53 class FFmpegFilterGraph : public FilterGraph
56 FFmpegFilterGraph (boost::shared_ptr<Film> film, FFmpegDecoder* decoder, libdcp::Size s, AVPixelFormat p);
57 ~FFmpegFilterGraph ();
59 bool can_process (libdcp::Size s, AVPixelFormat p) const;
60 std::list<boost::shared_ptr<Image> > process (AVFrame * frame);
63 AVFilterContext* _buffer_src_context;
64 AVFilterContext* _buffer_sink_context;
65 libdcp::Size _size; ///< size of the images that this chain can process
66 AVPixelFormat _pixel_format; ///< pixel format of the images that this chain can process
70 boost::shared_ptr<FilterGraph> filter_graph_factory (boost::shared_ptr<Film>, FFmpegDecoder *, libdcp::Size, AVPixelFormat);