src/lib/ffmpeg_examiner.h

   1 /*
   2     Copyright (C) 2013-2017 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   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.
  10
  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.
  15
  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/>.
  18
  19 */
  20
  21 #include "ffmpeg.h"
  22 #include "video_examiner.h"
  23 #include <boost/optional.hpp>
  24
  25 struct AVStream;
  26
  27 class FFmpegAudioStream;
  28 class FFmpegSubtitleStream;
  29 class Job;
  30
  31 class FFmpegExaminer : public FFmpeg, public VideoExaminer
  32 {
  33 public:
  34         FFmpegExaminer (boost::shared_ptr<const FFmpegContent>, boost::shared_ptr<Job> job = boost::shared_ptr<Job> ());
  35
  36         bool has_video () const;
  37
  38         boost::optional<double> video_frame_rate () const;
  39         dcp::Size video_size () const;
  40         Frame video_length () const;
  41         boost::optional<double> sample_aspect_ratio () const;
  42         bool yuv () const;
  43
  44         std::vector<boost::shared_ptr<FFmpegSubtitleStream> > subtitle_streams () const {
  45                 return _subtitle_streams;
  46         }
  47
  48         std::vector<boost::shared_ptr<FFmpegAudioStream> > audio_streams () const {
  49                 return _audio_streams;
  50         }
  51
  52         boost::optional<dcpomatic::ContentTime> first_video () const {
  53                 return _first_video;
  54         }
  55
  56         VideoRange range () const;
  57
  58         AVColorRange color_range () const {
  59                 return video_codec_context()->color_range;
  60         }
  61
  62         AVColorPrimaries color_primaries () const {
  63                 return video_codec_context()->color_primaries;
  64         }
  65
  66         AVColorTransferCharacteristic color_trc () const {
  67                 return video_codec_context()->color_trc;
  68         }
  69
  70         AVColorSpace colorspace () const {
  71                 return video_codec_context()->colorspace;
  72         }
  73
  74         boost::optional<int> bits_per_pixel () const;
  75
  76         boost::optional<double> rotation () const {
  77                 return _rotation;
  78         }
  79
  80         bool pulldown () const {
  81                 return _pulldown;
  82         }
  83
  84 #ifdef DCPOMATIC_VARIANT_SWAROOP
  85         boost::optional<std::string> id () const {
  86                 return _id;
  87         }
  88 #endif
  89
  90 private:
  91         void video_packet (AVCodecContext *, std::string& temporal_reference);
  92         void audio_packet (AVCodecContext *, boost::shared_ptr<FFmpegAudioStream>);
  93
  94         std::string stream_name (AVStream* s) const;
  95         std::string subtitle_stream_name (AVStream* s) const;
  96         boost::optional<dcpomatic::ContentTime> frame_time (AVStream* s) const;
  97
  98         std::vector<boost::shared_ptr<FFmpegSubtitleStream> > _subtitle_streams;
  99         std::vector<boost::shared_ptr<FFmpegAudioStream> > _audio_streams;
 100         boost::optional<dcpomatic::ContentTime> _first_video;
 101         /** Video length, either obtained from the header or derived by running
 102          *  through the whole file.
 103          */
 104         Frame _video_length;
 105         bool _need_video_length;
 106
 107         boost::optional<double> _rotation;
 108         bool _pulldown;
 109
 110 #ifdef DCPOMATIC_VARIANT_SWAROOP
 111         boost::optional<std::string> _id;
 112 #endif
 113
 114         struct SubtitleStart
 115         {
 116                 SubtitleStart (std::string id_, bool image_, dcpomatic::ContentTime time_)
 117                         : id (id_)
 118                         , image (image_)
 119                         , time (time_)
 120                 {}
 121
 122                 std::string id;
 123                 /** true if it's an image subtitle, false for text */
 124                 bool image;
 125                 dcpomatic::ContentTime time;
 126         };
 127
 128         typedef std::map<boost::shared_ptr<FFmpegSubtitleStream>, boost::optional<SubtitleStart> > LastSubtitleMap;
 129         LastSubtitleMap _last_subtitle_start;
 130 };