src/dcp_reader.cc

   1 /*
   2     Copyright (C) 2014-2017 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 boost::shared_ptr;
  34 using boost::optional;
  35 using namespace sub;
  36
  37 static Time
  38 dcp_to_sub_time (dcp::Time t)
  39 {
  40         return Time::from_hms (t.h, t.m, t.s, t.e * 1000.0 / t.tcr);
  41 }
  42
  43 static Colour
  44 dcp_to_sub_colour (dcp::Colour c)
  45 {
  46         return Colour (c.r / 255.0, c.g / 255.0, c.b / 255.0);
  47 }
  48
  49 DCPReader::DCPReader (boost::filesystem::path file)
  50 {
  51         shared_ptr<dcp::SubtitleAsset> sc;
  52         string interop_error;
  53         string smpte_error;
  54
  55         try {
  56                 sc.reset (new dcp::InteropSubtitleAsset (file));
  57         } catch (exception& e) {
  58                 interop_error = e.what ();
  59         }
  60
  61         if (!sc) {
  62                 try {
  63                         sc.reset (new dcp::SMPTESubtitleAsset (file));
  64                 } catch (exception& e) {
  65                         smpte_error = e.what();
  66                 }
  67         }
  68
  69         if (!sc) {
  70                 throw DCPError (String::compose ("Could not read subtitles (%1 / %2)", interop_error, smpte_error));
  71         }
  72
  73
  74         BOOST_FOREACH (dcp::SubtitleString const & i, sc->subtitles ()) {
  75                 RawSubtitle rs;
  76                 rs.text = i.text ();
  77                 rs.font = i.font ();
  78                 rs.font_size = FontSize::from_proportional (i.size() / (72.0 * 11.0));
  79
  80                 switch (i.effect ()) {
  81                 case dcp::BORDER:
  82                         rs.effect = BORDER;
  83                         break;
  84                 case dcp::SHADOW:
  85                         rs.effect = SHADOW;
  86                         break;
  87                 default:
  88                         break;
  89                 }
  90
  91                 rs.effect_colour = dcp_to_sub_colour (i.effect_colour());
  92
  93                 rs.colour = dcp_to_sub_colour (i.colour());
  94                 rs.bold = i.bold ();
  95                 rs.italic = i.italic ();
  96                 rs.underline = i.underline ();
  97
  98                 switch (i.h_align()) {
  99                 case dcp::HALIGN_LEFT:
 100                         rs.horizontal_position = LEFT;
 101                         break;
 102                 case dcp::HALIGN_CENTER:
 103                         rs.horizontal_position = CENTRE;
 104                         break;
 105                 case dcp::HALIGN_RIGHT:
 106                         rs.horizontal_position = RIGHT;
 107                         break;
 108                 }
 109
 110                 rs.vertical_position.proportional = i.v_position();
 111                 switch (i.v_align()) {
 112                 case dcp::VALIGN_TOP:
 113                         rs.vertical_position.reference = TOP_OF_SCREEN;
 114                         break;
 115                 case dcp::VALIGN_CENTER:
 116                         rs.vertical_position.reference = CENTRE_OF_SCREEN;
 117                         break;
 118                 case dcp::VALIGN_BOTTOM:
 119                         rs.vertical_position.reference = BOTTOM_OF_SCREEN;
 120                         break;
 121                 }
 122
 123                 rs.from = dcp_to_sub_time (i.in ());
 124                 rs.to = dcp_to_sub_time (i.out ());
 125
 126                 rs.fade_up = dcp_to_sub_time (i.fade_up_time ());
 127                 rs.fade_down = dcp_to_sub_time (i.fade_down_time ());
 128
 129                 _subs.push_back (rs);
 130         }
 131 }