2 Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 /** @file src/ffmpeg_decoder.h
22 * @brief A decoder using FFmpeg to decode content.
29 #include <libavcodec/avcodec.h>
31 #include <boost/shared_ptr.hpp>
32 #include <boost/thread/mutex.hpp>
36 class VideoFilterGraph;
37 class FFmpegAudioStream;
40 struct ffmpeg_pts_offset_test;
42 /** @class FFmpegDecoder
43 * @brief A decoder using FFmpeg to decode content.
45 class FFmpegDecoder : public FFmpeg, public Decoder
48 FFmpegDecoder (boost::shared_ptr<const Film> film, boost::shared_ptr<const FFmpegContent>, bool fast);
51 void seek (dcpomatic::ContentTime time, bool);
54 friend struct ::ffmpeg_pts_offset_test;
58 AVSampleFormat audio_sample_format (boost::shared_ptr<FFmpegAudioStream> stream) const;
59 int bytes_per_audio_sample (boost::shared_ptr<FFmpegAudioStream> stream) const;
61 bool decode_video_packet ();
62 void decode_audio_packet ();
63 void decode_subtitle_packet ();
65 void decode_bitmap_subtitle (AVSubtitleRect const * rect, dcpomatic::ContentTime from);
66 void decode_ass_subtitle (std::string ass, dcpomatic::ContentTime from);
68 void maybe_add_subtitle ();
69 boost::shared_ptr<AudioBuffers> deinterleave_audio (boost::shared_ptr<FFmpegAudioStream> stream) const;
71 std::list<boost::shared_ptr<VideoFilterGraph> > _filter_graphs;
72 boost::mutex _filter_graphs_mutex;
74 dcpomatic::ContentTime _pts_offset;
75 boost::optional<dcpomatic::ContentTime> _current_subtitle_to;
76 /** true if we have a subtitle which has not had emit_stop called for it yet */
77 bool _have_current_subtitle;
79 boost::shared_ptr<Image> _black_image;
81 std::vector<boost::optional<dcpomatic::ContentTime> > _next_time;