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"
30 #include "video_filter_graph_set.h"
33 #include <libavcodec/avcodec.h>
35 #include <boost/thread/mutex.hpp>
40 class FFmpegAudioStream;
43 class VideoFilterGraph;
44 struct ffmpeg_pts_offset_test;
47 /** @class FFmpegDecoder
48 * @brief A decoder using FFmpeg to decode content.
50 class FFmpegDecoder : public FFmpeg, public Decoder
53 FFmpegDecoder (std::shared_ptr<const Film> film, std::shared_ptr<const FFmpegContent>, bool fast);
55 bool pass () override;
56 void seek (dcpomatic::ContentTime time, bool) override;
59 friend struct ::ffmpeg_pts_offset_test;
61 enum class FlushResult {
68 AVSampleFormat audio_sample_format (std::shared_ptr<FFmpegAudioStream> stream) const;
69 int bytes_per_audio_sample (std::shared_ptr<FFmpegAudioStream> stream) const;
71 std::shared_ptr<FFmpegAudioStream> audio_stream_from_index (int index) const;
72 void process_audio_frame (std::shared_ptr<FFmpegAudioStream> stream);
74 void process_video_frame ();
76 bool decode_and_process_video_packet (AVPacket* packet);
77 void decode_and_process_audio_packet (AVPacket* packet);
78 void decode_and_process_subtitle_packet (AVPacket* packet);
80 BitmapText process_bitmap_subtitle (AVSubtitleRect const * rect);
81 void process_ass_subtitle (std::string ass, dcpomatic::ContentTime from);
83 void maybe_add_subtitle ();
85 FlushResult flush_codecs();
86 FlushResult flush_fill();
88 VideoFilterGraphSet _filter_graphs;
90 dcpomatic::ContentTime _pts_offset;
91 boost::optional<dcpomatic::ContentTime> _current_subtitle_to;
92 /** true if we have a subtitle which has not had emit_stop called for it yet */
93 bool _have_current_subtitle = false;
95 std::shared_ptr<Image> _black_image;
97 std::map<std::shared_ptr<FFmpegAudioStream>, boost::optional<dcpomatic::ContentTime>> _next_time;
99 enum class FlushState {
105 FlushState _flush_state = FlushState::CODECS;