git.sesse.net Git - casparcg/blob - modules/psd/descriptor.cpp

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Niklas P Andersson, niklas.p.andersson@svt.se
  20 */
  21
  22 #include <memory>
  23 #include "descriptor.h"
  24 #include <boost\property_tree\ptree.hpp>
  25 #include "misc.h"
  26
  27 namespace caspar { namespace psd {
  28
  29         class descriptor::context::scoped_holder
  30         {
  31                 descriptor::context::ptr_type ctx_;
  32         public:
  33                 explicit scoped_holder(const std::wstring& key, descriptor::context::ptr_type ctx) : ctx_(ctx)
  34                 {
  35                         Ptree *parent = ctx_->stack.back();
  36                         Ptree *child = &parent->push_back(std::make_pair(key, Ptree()))->second;
  37                         ctx_->stack.push_back(child);
  38                 }
  39                 ~scoped_holder()
  40                 {
  41                         ctx_->stack.pop_back();
  42                 }
  43         };
  44
  45         descriptor::descriptor() : context_(std::make_shared<context>())
  46         {
  47                 context_->stack.push_back(&context_->root);
  48         }
  49         descriptor::descriptor(const std::wstring& key, context::ptr_type context) : context_(context)
  50         {
  51                 Ptree *parent = context_->stack.back();
  52                 Ptree *child = &parent->push_back(std::make_pair(key, Ptree()))->second;
  53                 context->stack.push_back(child);
  54         }
  55         descriptor::~descriptor()
  56         {
  57                 context_->stack.pop_back();
  58         }
  59
  60 bool descriptor::populate(BEFileInputStream& stream)
  61 {
  62         bool result = true;
  63
  64         try
  65         {
  66                 stream.read_unicode_string();
  67                 stream.read_id_string();
  68                 unsigned long element_count = stream.read_long();
  69                 for(int element_index = 0; element_index < element_count; ++element_index)
  70                 {
  71                         std::wstring key = stream.read_id_string();
  72                         read_value(key, stream);
  73                 }
  74         }
  75         catch(std::exception& ex)
  76         {
  77                 result = false;
  78         }
  79
  80         return result;
  81 }
  82
  83 void descriptor::read_value(const std::wstring& key, BEFileInputStream& stream)
  84 {
  85         unsigned int type = stream.read_long();
  86
  87         switch(type)
  88         {
  89         case 'Objc':
  90                 {
  91                         descriptor desc(key, context_);
  92                         desc.populate(stream);
  93                 }
  94                 break;
  95
  96         case 'doub':
  97                 {
  98                         context_->stack.back()->put(key, stream.read_double());
  99                 }
 100                 break;
 101
 102         case 'TEXT':
 103                 {
 104                         context_->stack.back()->put(key, stream.read_unicode_string());
 105                 }
 106                 break;
 107
 108         case 'enum':
 109                 {
 110                         context_->stack.back()->put(stream.read_id_string(), stream.read_id_string());
 111                 }
 112                 break;
 113
 114         case 'long':
 115                 {
 116                         context_->stack.back()->put(key, static_cast<long>(stream.read_long()));
 117                 }
 118                 break;
 119
 120         case 'bool':
 121                 {
 122                         context_->stack.back()->put(key, stream.read_byte());
 123                 }
 124                 break;
 125
 126         case 'VlLs':
 127                 {
 128                         context::scoped_holder list(key, context_);
 129                         unsigned long count = stream.read_long();
 130                         for(int i = 0; i < count; ++i)
 131                         {
 132                                 read_value(L"li", stream);
 133                         }
 134                 }
 135                 break;
 136
 137         case 'tdta':
 138                 {
 139                         unsigned long rawdata_length = stream.read_long();
 140                         std::vector<char> rawdata(rawdata_length);
 141                         stream.read(rawdata.data(), rawdata_length);
 142
 143                         std::wstring data_str(rawdata.begin(), rawdata.end());
 144                         context_->stack.back()->put(key, data_str);
 145                 }
 146                 break;
 147
 148         case 'UntF':
 149                 {
 150                         context::scoped_holder list(key, context_);
 151                         unsigned long unit = stream.read_long();
 152                         std::string type(reinterpret_cast<char*>(&unit), 4);
 153                         std::wstring wtype(type.rbegin(), type.rend());
 154                         context_->stack.back()->put(wtype, stream.read_double());
 155                 }
 156                 break;
 157
 158         case 'obj ':
 159         case 'GlbO':
 160         case 'type':
 161         case 'GlbC':
 162         case 'alis':
 163         default:
 164                 //descriptor type not supported yet
 165                 throw PSDFileFormatException();
 166         }
 167 }
 168
 169 }       //namespace psd
 170 }       //namespace caspar