src/lib/dcp_film_encoder.cc

   1 /*
   2     Copyright (C) 2012-2020 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
  22 /** @file  src/dcp_film_encoder.cc
  23  *  @brief A class which takes a Film and some Options, then uses those to encode the film into a DCP.
  24  *
  25  *  A decoder is selected according to the content type, and the encoder can be specified
  26  *  as a parameter to the constructor.
  27  */
  28
  29
  30 #include "audio_decoder.h"
  31 #include "compose.hpp"
  32 #include "dcp_film_encoder.h"
  33 #include "film.h"
  34 #include "j2k_encoder.h"
  35 #include "job.h"
  36 #include "player.h"
  37 #include "player_video.h"
  38 #include "referenced_reel_asset.h"
  39 #include "text_content.h"
  40 #include "video_decoder.h"
  41 #include "writer.h"
  42 #include <boost/signals2.hpp>
  43 #include <iostream>
  44
  45 #include "i18n.h"
  46
  47
  48 using std::cout;
  49 using std::dynamic_pointer_cast;
  50 using std::list;
  51 using std::make_shared;
  52 using std::shared_ptr;
  53 using std::string;
  54 using std::vector;
  55 using std::weak_ptr;
  56 using boost::optional;
  57 #if BOOST_VERSION >= 106100
  58 using namespace boost::placeholders;
  59 #endif
  60 using namespace dcpomatic;
  61
  62
  63 /** Construct a DCP encoder.
  64  *  @param film Film that we are encoding.
  65  *  @param job Job that this encoder is being used in.
  66  */
  67 DCPFilmEncoder::DCPFilmEncoder(shared_ptr<const Film> film, weak_ptr<Job> job)
  68         : FilmEncoder(film, job)
  69         , _writer(film, job)
  70         , _encoder(new J2KEncoder(film, _writer))
  71         , _finishing (false)
  72         , _non_burnt_subtitles (false)
  73 {
  74         _player_video_connection = _player.Video.connect(bind(&DCPFilmEncoder::video, this, _1, _2));
  75         _player_audio_connection = _player.Audio.connect(bind(&DCPFilmEncoder::audio, this, _1, _2));
  76         _player_text_connection = _player.Text.connect(bind(&DCPFilmEncoder::text, this, _1, _2, _3, _4));
  77         _player_atmos_connection = _player.Atmos.connect(bind(&DCPFilmEncoder::atmos, this, _1, _2, _3));
  78
  79         for (auto c: film->content ()) {
  80                 for (auto i: c->text) {
  81                         if (i->use() && !i->burn()) {
  82                                 _non_burnt_subtitles = true;
  83                         }
  84                 }
  85         }
  86 }
  87
  88 DCPFilmEncoder::~DCPFilmEncoder()
  89 {
  90         /* We must stop receiving more video data before we die */
  91         _player_video_connection.release ();
  92         _player_audio_connection.release ();
  93         _player_text_connection.release ();
  94         _player_atmos_connection.release ();
  95 }
  96
  97 void
  98 DCPFilmEncoder::go()
  99 {
 100         _writer.start();
 101         _encoder->begin();
 102
 103         {
 104                 auto job = _job.lock ();
 105                 DCPOMATIC_ASSERT (job);
 106                 job->sub (_("Encoding"));
 107         }
 108
 109         if (_non_burnt_subtitles) {
 110                 _writer.write(_player.get_subtitle_fonts());
 111         }
 112
 113         while (!_player.pass()) {}
 114
 115         for (auto i: get_referenced_reel_assets(_film, _film->playlist())) {
 116                 _writer.write(i);
 117         }
 118
 119         _finishing = true;
 120         _encoder->end();
 121         _writer.finish(_film->dir(_film->dcp_name()));
 122 }
 123
 124
 125 void
 126 DCPFilmEncoder::pause()
 127 {
 128         _encoder->pause();
 129 }
 130
 131
 132 void
 133 DCPFilmEncoder::resume()
 134 {
 135         _encoder->resume();
 136 }
 137
 138 void
 139 DCPFilmEncoder::video(shared_ptr<PlayerVideo> data, DCPTime time)
 140 {
 141         _encoder->encode(data, time);
 142 }
 143
 144 void
 145 DCPFilmEncoder::audio(shared_ptr<AudioBuffers> data, DCPTime time)
 146 {
 147         _writer.write(data, time);
 148
 149         auto job = _job.lock ();
 150         DCPOMATIC_ASSERT (job);
 151         job->set_progress (float(time.get()) / _film->length().get());
 152 }
 153
 154 void
 155 DCPFilmEncoder::text(PlayerText data, TextType type, optional<DCPTextTrack> track, DCPTimePeriod period)
 156 {
 157         if (type == TextType::CLOSED_CAPTION || _non_burnt_subtitles) {
 158                 _writer.write(data, type, track, period);
 159         }
 160 }
 161
 162
 163 void
 164 DCPFilmEncoder::atmos(shared_ptr<const dcp::AtmosFrame> data, DCPTime time, AtmosMetadata metadata)
 165 {
 166         _writer.write(data, time, metadata);
 167 }
 168
 169
 170 optional<float>
 171 DCPFilmEncoder::current_rate() const
 172 {
 173         return _encoder->current_encoding_rate();
 174 }
 175
 176 Frame
 177 DCPFilmEncoder::frames_done() const
 178 {
 179         return _encoder->video_frames_enqueued();
 180 }