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
  40 using std::string;
  41 using std::cout;
  42 using boost::shared_ptr;
  43
  44 /** @param f Film we are making the DCP for.
  45  *  @param o Options.
  46  */
  47 MakeDCPJob::MakeDCPJob (shared_ptr<Film> f, shared_ptr<const EncodeOptions> o, shared_ptr<Job> req)
  48         : Job (f, req)
  49         , _opt (o)
  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         SourceFrame const s = ((f + offset) * dcp_frame_rate(_film->frames_per_second()).skip) + _film->dcp_trim_start();
  65         return _opt->frame_out_path (s, false);
  66 }
  67
  68 string
  69 MakeDCPJob::wav_path (libdcp::Channel c) const
  70 {
  71         return _opt->multichannel_audio_out_path (int (c), false);
  72 }
  73
  74 void
  75 MakeDCPJob::run ()
  76 {
  77         if (!_film->dcp_length()) {
  78                 throw EncodeError ("cannot make a DCP when the source length is not known");
  79         }
  80
  81         descend (0.9);
  82
  83         string const dcp_path = _film->dir (_film->dcp_name());
  84
  85         /* Remove any old DCP */
  86         boost::filesystem::remove_all (dcp_path);
  87
  88         DCPFrameRate const dfr = dcp_frame_rate (_film->frames_per_second ());
  89
  90         int frames = 0;
  91         switch (_film->content_type ()) {
  92         case VIDEO:
  93                 /* Source frames -> DCP frames */
  94                 frames = _film->dcp_length().get() / dfr.skip;
  95                 break;
  96         case STILL:
  97                 frames = _film->still_duration() * 24;
  98                 break;
  99         }
 100
 101         libdcp::DCP dcp (_film->dir (_film->dcp_name()));
 102         dcp.Progress.connect (boost::bind (&MakeDCPJob::dcp_progress, this, _1));
 103
 104         shared_ptr<libdcp::CPL> cpl (
 105                 new libdcp::CPL (_film->dir (_film->dcp_name()), _film->dcp_name(), _film->dcp_content_type()->libdcp_kind (), frames, dfr.frames_per_second)
 106                 );
 107
 108         dcp.add_cpl (cpl);
 109
 110         int frames_per_reel = 0;
 111         if (_film->reel_size()) {
 112                 frames_per_reel = (_film->reel_size().get() / (_film->j2k_bandwidth() / 8)) * dfr.frames_per_second;
 113         } else {
 114                 frames_per_reel = frames;
 115         }
 116
 117         int frames_done = 0;
 118         int reel = 0;
 119
 120         while (frames_done < frames) {
 121
 122                 descend (float (frames_per_reel) / frames);
 123
 124                 int this_time = std::min (frames_per_reel, (frames - frames_done));
 125
 126                 descend (0.8);
 127
 128                 shared_ptr<libdcp::MonoPictureAsset> pa (
 129                         new libdcp::MonoPictureAsset (
 130                                 boost::bind (&MakeDCPJob::j2c_path, this, _1, frames_done),
 131                                 _film->dir (_film->dcp_name()),
 132                                 String::compose ("video_%1.mxf", reel),
 133                                 &dcp.Progress,
 134                                 dfr.frames_per_second,
 135                                 this_time,
 136                                 _opt->out_size.width,
 137                                 _opt->out_size.height,
 138                                 _film->encrypted()
 139                                 )
 140                         );
 141
 142                 ascend ();
 143
 144                 shared_ptr<libdcp::SoundAsset> sa;
 145
 146                 if (_film->audio_channels() > 0) {
 147                         descend (0.1);
 148                         sa.reset (
 149                                 new libdcp::SoundAsset (
 150                                         boost::bind (&MakeDCPJob::wav_path, this, _1),
 151                                         _film->dir (_film->dcp_name()),
 152                                         String::compose ("audio_%1.mxf", reel),
 153                                         &dcp.Progress,
 154                                         dfr.frames_per_second,
 155                                         this_time,
 156                                         frames_done,
 157                                         dcp_audio_channels (_film->audio_channels()),
 158                                         _film->encrypted()
 159                                         )
 160                                 );
 161                         ascend ();
 162                 }
 163
 164                 descend (0.1);
 165                 cpl->add_reel (shared_ptr<libdcp::Reel> (new libdcp::Reel (pa, sa, shared_ptr<libdcp::SubtitleAsset> ())));
 166                 ascend ();
 167
 168                 frames_done += frames_per_reel;
 169                 ++reel;
 170
 171                 ascend ();
 172         }
 173
 174         ascend ();
 175
 176         descend (0.1);
 177         dcp.write_xml ();
 178         ascend ();
 179
 180         set_progress (1);
 181         set_state (FINISHED_OK);
 182 }
 183
 184 void
 185 MakeDCPJob::dcp_progress (float p)
 186 {
 187         set_progress (p);
 188 }