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/>.
22 /** @file src/ffmpeg_decoder.h
23 * @brief A decoder using FFmpeg to decode content.
27 #include "bitmap_text.h"
32 #include <libavcodec/avcodec.h>
34 #include <boost/thread/mutex.hpp>
39 class FFmpegAudioStream;
42 class VideoFilterGraph;
43 struct ffmpeg_pts_offset_test;
46 /** @class FFmpegDecoder
47 * @brief A decoder using FFmpeg to decode content.
49 class FFmpegDecoder : public FFmpeg, public Decoder
52 FFmpegDecoder (std::shared_ptr<const Film> film, std::shared_ptr<const FFmpegContent>, bool fast);
54 bool pass () override;
55 void seek (dcpomatic::ContentTime time, bool) override;
58 friend struct ::ffmpeg_pts_offset_test;
62 AVSampleFormat audio_sample_format (std::shared_ptr<FFmpegAudioStream> stream) const;
63 int bytes_per_audio_sample (std::shared_ptr<FFmpegAudioStream> stream) const;
65 std::shared_ptr<FFmpegAudioStream> audio_stream_from_index (int index) const;
66 void process_audio_frame (std::shared_ptr<FFmpegAudioStream> stream);
68 void process_video_frame ();
70 bool decode_and_process_video_packet (AVPacket* packet);
71 void decode_and_process_audio_packet (AVPacket* packet);
72 void decode_and_process_subtitle_packet (AVPacket* packet);
74 BitmapText process_bitmap_subtitle (AVSubtitleRect const * rect);
75 void process_ass_subtitle (std::string ass, dcpomatic::ContentTime from);
77 void maybe_add_subtitle ();
79 std::list<std::shared_ptr<VideoFilterGraph>> _filter_graphs;
80 boost::mutex _filter_graphs_mutex;
82 dcpomatic::ContentTime _pts_offset;
83 boost::optional<dcpomatic::ContentTime> _current_subtitle_to;
84 /** true if we have a subtitle which has not had emit_stop called for it yet */
85 bool _have_current_subtitle = false;
87 std::shared_ptr<Image> _black_image;
89 std::map<std::shared_ptr<FFmpegAudioStream>, boost::optional<dcpomatic::ContentTime>> _next_time;