src/lib/make_dcp_job.cc

   1 /*
   2     Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 /** @file src/make_dcp_job.cc
  21  *  @brief A job to create DCPs.
  22  */
  23
  24 #include <iostream>
  25 #include <boost/filesystem.hpp>
  26 #include <libdcp/dcp.h>
  27 #include <libdcp/picture_asset.h>
  28 #include <libdcp/sound_asset.h>
  29 #include <libdcp/reel.h>
  30 extern "C" {
  31 #include <libavutil/pixdesc.h>
  32 }
  33 #include "make_dcp_job.h"
  34 #include "dcp_content_type.h"
  35 #include "exceptions.h"
  36 #include "options.h"
  37 #include "imagemagick_decoder.h"
  38 #include "film.h"
  39 #include "format.h"
  40
  41 using std::string;
  42 using std::cout;
  43 using boost::shared_ptr;
  44
  45 /** @param f Film we are making the DCP for.
  46  *  @param o Options.
  47  */
  48 MakeDCPJob::MakeDCPJob (shared_ptr<Film> f, shared_ptr<Job> req)
  49         : Job (f, req)
  50 {
  51
  52 }
  53
  54 string
  55 MakeDCPJob::name () const
  56 {
  57         return String::compose ("Make DCP for %1", _film->name());
  58 }
  59
  60 /** @param f DCP frame index */
  61 string
  62 MakeDCPJob::j2c_path (int f, int offset) const
  63 {
  64         return _film->frame_out_path (f, false);
  65 }
  66
  67 string
  68 MakeDCPJob::wav_path (libdcp::Channel c) const
  69 {
  70         return _film->multichannel_audio_out_path (int (c), false);
  71 }
  72
  73 void
  74 MakeDCPJob::run ()
  75 {
  76         if (!_film->dcp_intrinsic_duration()) {
  77                 throw EncodeError ("cannot make a DCP when its intrinsic duration is not known");
  78         }
  79
  80         descend (0.9);
  81
  82         string const dcp_path = _film->dir (_film->dcp_name());
  83
  84         /* Remove any old DCP */
  85         boost::filesystem::remove_all (dcp_path);
  86
  87         int const frames = _film->dcp_intrinsic_duration().get();
  88         int const duration = frames - _film->trim_start() - _film->trim_end();
  89         DCPFrameRate const dfr (_film->frames_per_second ());
  90
  91         libdcp::DCP dcp (_film->dir (_film->dcp_name()));
  92         dcp.Progress.connect (boost::bind (&MakeDCPJob::dcp_progress, this, _1));
  93
  94         shared_ptr<libdcp::CPL> cpl (
  95                 new libdcp::CPL (_film->dir (_film->dcp_name()), _film->dcp_name(), _film->dcp_content_type()->libdcp_kind (), frames, dfr.frames_per_second)
  96                 );
  97
  98         dcp.add_cpl (cpl);
  99
 100         int frames_per_reel = 0;
 101         if (_film->reel_size()) {
 102                 frames_per_reel = (_film->reel_size().get() / (_film->j2k_bandwidth() / 8)) * dfr.frames_per_second;
 103         } else {
 104                 frames_per_reel = frames;
 105         }
 106
 107         int frames_done = 0;
 108         int reel = 0;
 109
 110         while (frames_done < frames) {
 111
 112                 descend (float (frames_per_reel) / frames);
 113
 114                 int this_time = std::min (frames_per_reel, (frames - frames_done));
 115
 116                 descend (0.8);
 117
 118                 shared_ptr<libdcp::MonoPictureAsset> pa (
 119                         new libdcp::MonoPictureAsset (
 120                                 boost::bind (&MakeDCPJob::j2c_path, this, _1, frames_done),
 121                                 _film->dir (_film->dcp_name()),
 122                                 String::compose ("video_%1.mxf", reel),
 123                                 &dcp.Progress,
 124                                 dfr.frames_per_second,
 125                                 this_time,
 126                                 _film->format()->dcp_size()
 127                                 )
 128                         );
 129
 130                 pa->set_entry_point (_film->trim_start ());
 131                 pa->set_duration (duration);
 132
 133                 ascend ();
 134
 135                 shared_ptr<libdcp::SoundAsset> sa;
 136
 137                 if (_film->audio_channels() > 0) {
 138                         descend (0.1);
 139                         sa.reset (
 140                                 new libdcp::SoundAsset (
 141                                         boost::bind (&MakeDCPJob::wav_path, this, _1),
 142                                         _film->dir (_film->dcp_name()),
 143                                         String::compose ("audio_%1.mxf", reel),
 144                                         &dcp.Progress,
 145                                         dfr.frames_per_second,
 146                                         this_time,
 147                                         frames_done,
 148                                         dcp_audio_channels (_film->audio_channels())
 149                                         )
 150                                 );
 151
 152                         sa->set_entry_point (_film->trim_start ());
 153                         sa->set_duration (duration);
 154
 155                         ascend ();
 156                 }
 157
 158                 descend (0.1);
 159                 cpl->add_reel (shared_ptr<libdcp::Reel> (new libdcp::Reel (pa, sa, shared_ptr<libdcp::SubtitleAsset> ())));
 160                 ascend ();
 161
 162                 frames_done += frames_per_reel;
 163                 ++reel;
 164
 165                 ascend ();
 166         }
 167
 168         ascend ();
 169
 170         descend (0.1);
 171         dcp.write_xml ();
 172         ascend ();
 173
 174         set_progress (1);
 175         set_state (FINISHED_OK);
 176 }
 177
 178 void
 179 MakeDCPJob::dcp_progress (float p)
 180 {
 181         set_progress (p);
 182 }