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/thread/mutex.hpp>
35 class VideoFilterGraph;
36 class FFmpegAudioStream;
39 struct ffmpeg_pts_offset_test;
41 /** @class FFmpegDecoder
42 * @brief A decoder using FFmpeg to decode content.
44 class FFmpegDecoder : public FFmpeg, public Decoder
47 FFmpegDecoder (std::shared_ptr<const Film> film, std::shared_ptr<const FFmpegContent>, bool fast);
49 bool pass () override;
50 void seek (dcpomatic::ContentTime time, bool) override;
53 friend struct ::ffmpeg_pts_offset_test;
57 static std::shared_ptr<AudioBuffers> deinterleave_audio (AVFrame* frame);
59 AVSampleFormat audio_sample_format (std::shared_ptr<FFmpegAudioStream> stream) const;
60 int bytes_per_audio_sample (std::shared_ptr<FFmpegAudioStream> stream) const;
62 std::shared_ptr<FFmpegAudioStream> audio_stream_from_index (int index) const;
63 void process_audio_frame (std::shared_ptr<FFmpegAudioStream> stream);
65 bool decode_and_process_video_packet (AVPacket* packet);
66 void decode_and_process_audio_packet (AVPacket* packet);
67 void decode_and_process_subtitle_packet (AVPacket* packet);
69 void process_bitmap_subtitle (AVSubtitleRect const * rect, dcpomatic::ContentTime from);
70 void process_ass_subtitle (std::string ass, dcpomatic::ContentTime from);
72 void maybe_add_subtitle ();
74 std::list<std::shared_ptr<VideoFilterGraph>> _filter_graphs;
75 boost::mutex _filter_graphs_mutex;
77 dcpomatic::ContentTime _pts_offset;
78 boost::optional<dcpomatic::ContentTime> _current_subtitle_to;
79 /** true if we have a subtitle which has not had emit_stop called for it yet */
80 bool _have_current_subtitle = false;
82 std::shared_ptr<Image> _black_image;
84 std::map<std::shared_ptr<FFmpegAudioStream>, boost::optional<dcpomatic::ContentTime>> _next_time;