1 /* -*- c-basic-offset: 8; default-tab-width: 8; -*- */
4 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
6 This program 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 This program 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 this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 /** @file src/ffmpeg_decoder.h
23 * @brief A decoder using FFmpeg to decode content.
29 #include <boost/shared_ptr.hpp>
30 #include <boost/optional.hpp>
31 #include <boost/thread/mutex.hpp>
33 #include <libavcodec/avcodec.h>
34 #include <libpostproc/postprocess.h>
38 #include "video_decoder.h"
39 #include "audio_decoder.h"
41 #include "ffmpeg_content.h"
44 struct AVCodecContext;
45 struct AVFilterContext;
46 struct AVFormatContext;
48 struct AVBufferContext;
56 /** @class FFmpegDecoder
57 * @brief A decoder using FFmpeg to decode content.
59 class FFmpegDecoder : public VideoDecoder, public AudioDecoder
62 FFmpegDecoder (boost::shared_ptr<const Film>, boost::shared_ptr<const FFmpegContent>, bool video, bool audio, bool subtitles);
65 float video_frame_rate () const;
66 libdcp::Size native_size () const;
67 ContentVideoFrame video_length () const;
68 int time_base_numerator () const;
69 int time_base_denominator () const;
70 int sample_aspect_ratio_numerator () const;
71 int sample_aspect_ratio_denominator () const;
73 std::vector<boost::shared_ptr<FFmpegSubtitleStream> > subtitle_streams () const {
74 return _subtitle_streams;
77 std::vector<boost::shared_ptr<FFmpegAudioStream> > audio_streams () const {
78 return _audio_streams;
88 /* No copy construction */
89 FFmpegDecoder (FFmpegDecoder const &);
90 FFmpegDecoder& operator= (FFmpegDecoder const &);
92 PixelFormat pixel_format () const;
93 AVSampleFormat audio_sample_format () const;
94 int bytes_per_audio_sample () const;
95 bool do_seek (double, bool, bool);
97 void setup_general ();
100 void setup_subtitle ();
102 bool decode_video_packet ();
103 void decode_audio_packet ();
105 void maybe_add_subtitle ();
106 boost::shared_ptr<AudioBuffers> deinterleave_audio (uint8_t** data, int size);
108 void film_changed (Film::Property);
110 std::string stream_name (AVStream* s) const;
112 boost::shared_ptr<const FFmpegContent> _ffmpeg_content;
114 AVFormatContext* _format_context;
119 AVCodecContext* _video_codec_context;
120 AVCodec* _video_codec;
121 AVCodecContext* _audio_codec_context; ///< may be 0 if there is no audio
122 AVCodec* _audio_codec; ///< may be 0 if there is no audio
123 AVCodecContext* _subtitle_codec_context; ///< may be 0 if there is no subtitle
124 AVCodec* _subtitle_codec; ///< may be 0 if there is no subtitle
128 std::list<boost::shared_ptr<FilterGraph> > _filter_graphs;
129 boost::mutex _filter_graphs_mutex;
131 std::vector<boost::shared_ptr<FFmpegSubtitleStream> > _subtitle_streams;
132 std::vector<boost::shared_ptr<FFmpegAudioStream> > _audio_streams;
136 bool _decode_subtitles;
138 /* It would appear (though not completely verified) that one must have
139 a mutex around calls to avcodec_open* and avcodec_close... and here
142 static boost::mutex _mutex;