src/lib/player_video_frame.cc

   1 /*
   2     Copyright (C) 2013-2014 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 <libdcp/raw_convert.h>
  21 #include "player_video_frame.h"
  22 #include "image.h"
  23 #include "image_proxy.h"
  24 #include "scaler.h"
  25
  26 using std::string;
  27 using std::cout;
  28 using boost::shared_ptr;
  29 using libdcp::raw_convert;
  30
  31 PlayerVideoFrame::PlayerVideoFrame (
  32         shared_ptr<const ImageProxy> in,
  33         Crop crop,
  34         libdcp::Size inter_size,
  35         libdcp::Size out_size,
  36         Scaler const * scaler,
  37         Eyes eyes,
  38         Part part,
  39         ColourConversion colour_conversion
  40         )
  41         : _in (in)
  42         , _crop (crop)
  43         , _inter_size (inter_size)
  44         , _out_size (out_size)
  45         , _scaler (scaler)
  46         , _eyes (eyes)
  47         , _part (part)
  48         , _colour_conversion (colour_conversion)
  49 {
  50
  51 }
  52
  53 PlayerVideoFrame::PlayerVideoFrame (shared_ptr<cxml::Node> node, shared_ptr<Socket> socket, shared_ptr<Log> log)
  54 {
  55         _crop = Crop (node);
  56
  57         _inter_size = libdcp::Size (node->number_child<int> ("InterWidth"), node->number_child<int> ("InterHeight"));
  58         _out_size = libdcp::Size (node->number_child<int> ("OutWidth"), node->number_child<int> ("OutHeight"));
  59         _scaler = Scaler::from_id (node->string_child ("Scaler"));
  60         _eyes = (Eyes) node->number_child<int> ("Eyes");
  61         _part = (Part) node->number_child<int> ("Part");
  62         _colour_conversion = ColourConversion (node);
  63
  64         _in = image_proxy_factory (node->node_child ("In"), socket, log);
  65
  66         if (node->optional_number_child<int> ("SubtitleX")) {
  67
  68                 _subtitle_position = Position<int> (node->number_child<int> ("SubtitleX"), node->number_child<int> ("SubtitleY"));
  69
  70                 shared_ptr<Image> image (
  71                         new Image (PIX_FMT_RGBA, libdcp::Size (node->number_child<int> ("SubtitleWidth"), node->number_child<int> ("SubtitleHeight")), true)
  72                         );
  73
  74                 image->read_from_socket (socket);
  75                 _subtitle_image = image;
  76         }
  77 }
  78
  79 void
  80 PlayerVideoFrame::set_subtitle (shared_ptr<const Image> image, Position<int> pos)
  81 {
  82         _subtitle_image = image;
  83         _subtitle_position = pos;
  84 }
  85
  86 shared_ptr<Image>
  87 PlayerVideoFrame::image () const
  88 {
  89         shared_ptr<Image> im = _in->image ();
  90
  91         Crop total_crop = _crop;
  92         switch (_part) {
  93         case PART_LEFT_HALF:
  94                 total_crop.right += im->size().width / 2;
  95                 break;
  96         case PART_RIGHT_HALF:
  97                 total_crop.left += im->size().width / 2;
  98                 break;
  99         case PART_TOP_HALF:
 100                 total_crop.bottom += im->size().height / 2;
 101                 break;
 102         case PART_BOTTOM_HALF:
 103                 total_crop.top += im->size().height / 2;
 104                 break;
 105         default:
 106                 break;
 107         }
 108
 109         shared_ptr<Image> out = im->crop_scale_window (total_crop, _inter_size, _out_size, _scaler, PIX_FMT_RGB24, false);
 110
 111         Position<int> const container_offset ((_out_size.width - _inter_size.width) / 2, (_out_size.height - _inter_size.width) / 2);
 112
 113         if (_subtitle_image) {
 114                 out->alpha_blend (_subtitle_image, _subtitle_position);
 115         }
 116
 117         return out;
 118 }
 119
 120 void
 121 PlayerVideoFrame::add_metadata (xmlpp::Node* node) const
 122 {
 123         _crop.as_xml (node);
 124         _in->add_metadata (node->add_child ("In"));
 125         node->add_child("InterWidth")->add_child_text (raw_convert<string> (_inter_size.width));
 126         node->add_child("InterHeight")->add_child_text (raw_convert<string> (_inter_size.height));
 127         node->add_child("OutWidth")->add_child_text (raw_convert<string> (_out_size.width));
 128         node->add_child("OutHeight")->add_child_text (raw_convert<string> (_out_size.height));
 129         node->add_child("Scaler")->add_child_text (_scaler->id ());
 130         node->add_child("Eyes")->add_child_text (raw_convert<string> (_eyes));
 131         node->add_child("Part")->add_child_text (raw_convert<string> (_part));
 132         _colour_conversion.as_xml (node);
 133         if (_subtitle_image) {
 134                 node->add_child ("SubtitleWidth")->add_child_text (raw_convert<string> (_subtitle_image->size().width));
 135                 node->add_child ("SubtitleHeight")->add_child_text (raw_convert<string> (_subtitle_image->size().height));
 136                 node->add_child ("SubtitleX")->add_child_text (raw_convert<string> (_subtitle_position.x));
 137                 node->add_child ("SubtitleY")->add_child_text (raw_convert<string> (_subtitle_position.y));
 138         }
 139 }
 140
 141 void
 142 PlayerVideoFrame::send_binary (shared_ptr<Socket> socket) const
 143 {
 144         _in->send_binary (socket);
 145         if (_subtitle_image) {
 146                 _subtitle_image->write_to_socket (socket);
 147         }
 148 }