src/dcp_reader.cc

   1 /*
   2     Copyright (C) 2014-2018 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 #include "dcp_reader.h"
  21 #include "compose.hpp"
  22 #include "exceptions.h"
  23 #include <dcp/subtitle_string.h>
  24 #include <dcp/interop_subtitle_asset.h>
  25 #include <dcp/smpte_subtitle_asset.h>
  26 #include <boost/foreach.hpp>
  27 #include <boost/filesystem.hpp>
  28
  29 using std::list;
  30 using std::cout;
  31 using std::string;
  32 using std::exception;
  33 using std::shared_ptr;
  34 using boost::optional;
  35 using std::dynamic_pointer_cast;
  36 using namespace sub;
  37
  38 static Time
  39 dcp_to_sub_time (dcp::Time t)
  40 {
  41         return Time::from_hms (t.h, t.m, t.s, t.e * 1000.0 / t.tcr);
  42 }
  43
  44 static Colour
  45 dcp_to_sub_colour (dcp::Colour c)
  46 {
  47         return Colour (c.r / 255.0, c.g / 255.0, c.b / 255.0);
  48 }
  49
  50 DCPReader::DCPReader (boost::filesystem::path file)
  51 {
  52         shared_ptr<dcp::SubtitleAsset> sc;
  53         string interop_error;
  54         string smpte_error;
  55
  56         try {
  57                 sc.reset (new dcp::InteropSubtitleAsset (file));
  58         } catch (exception& e) {
  59                 interop_error = e.what ();
  60         }
  61
  62         if (!sc) {
  63                 try {
  64                         sc.reset (new dcp::SMPTESubtitleAsset (file));
  65                 } catch (exception& e) {
  66                         smpte_error = e.what();
  67                 }
  68         }
  69
  70         if (!sc) {
  71                 throw DCPError (String::compose ("Could not read subtitles (%1 / %2)", interop_error, smpte_error));
  72         }
  73
  74
  75         BOOST_FOREACH (shared_ptr<dcp::Subtitle> i, sc->subtitles ()) {
  76
  77                 /* We don't deal with image subs */
  78                 shared_ptr<dcp::SubtitleString> is = dynamic_pointer_cast<dcp::SubtitleString>(i);
  79                 if (!is) {
  80                         continue;
  81                 }
  82
  83                 RawSubtitle rs;
  84                 rs.text = is->text ();
  85                 rs.font = is->font ();
  86                 rs.font_size = FontSize::from_proportional (is->size() / (72.0 * 11.0));
  87
  88                 switch (is->effect ()) {
  89                 case dcp::BORDER:
  90                         rs.effect = BORDER;
  91                         break;
  92                 case dcp::SHADOW:
  93                         rs.effect = SHADOW;
  94                         break;
  95                 default:
  96                         break;
  97                 }
  98
  99                 rs.effect_colour = dcp_to_sub_colour (is->effect_colour());
 100
 101                 rs.colour = dcp_to_sub_colour (is->colour());
 102                 rs.bold = is->bold ();
 103                 rs.italic = is->italic ();
 104                 rs.underline = is->underline ();
 105
 106                 switch (is->h_align()) {
 107                 case dcp::HALIGN_LEFT:
 108                         rs.horizontal_position.reference = LEFT_OF_SCREEN;
 109                         break;
 110                 case dcp::HALIGN_CENTER:
 111                         rs.horizontal_position.reference = HORIZONTAL_CENTRE_OF_SCREEN;
 112                         break;
 113                 case dcp::HALIGN_RIGHT:
 114                         rs.horizontal_position.reference = RIGHT_OF_SCREEN;
 115                         break;
 116                 }
 117
 118                 rs.vertical_position.proportional = is->v_position();
 119                 switch (is->v_align()) {
 120                 case dcp::VALIGN_TOP:
 121                         rs.vertical_position.reference = TOP_OF_SCREEN;
 122                         break;
 123                 case dcp::VALIGN_CENTER:
 124                         rs.vertical_position.reference = VERTICAL_CENTRE_OF_SCREEN;
 125                         break;
 126                 case dcp::VALIGN_BOTTOM:
 127                         rs.vertical_position.reference = BOTTOM_OF_SCREEN;
 128                         break;
 129                 }
 130
 131                 rs.from = dcp_to_sub_time (is->in ());
 132                 rs.to = dcp_to_sub_time (is->out ());
 133
 134                 rs.fade_up = dcp_to_sub_time (is->fade_up_time ());
 135                 rs.fade_down = dcp_to_sub_time (is->fade_down_time ());
 136
 137                 _subs.push_back (rs);
 138         }
 139 }