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 "descriptor.h"
  23 #include "misc.h"
  24
  25 #include <boost/property_tree/ptree.hpp>
  26
  27 #include <memory>
  28
  29 namespace caspar { namespace psd {
  30
  31         class descriptor::context::scoped_holder
  32         {
  33                 descriptor::context::ptr_type ctx_;
  34         public:
  35                 explicit scoped_holder(const std::wstring& key, descriptor::context::ptr_type ctx) : ctx_(ctx)
  36                 {
  37                         Ptree *parent = ctx_->stack.back();
  38                         Ptree *child = &parent->push_back(std::make_pair(key, Ptree()))->second;
  39                         ctx_->stack.push_back(child);
  40                 }
  41                 ~scoped_holder()
  42                 {
  43                         ctx_->stack.pop_back();
  44                 }
  45         };
  46
  47         descriptor::descriptor() : context_(std::make_shared<context>())
  48         {
  49                 context_->stack.push_back(&context_->root);
  50         }
  51         descriptor::descriptor(const std::wstring& key, context::ptr_type context) : context_(context)
  52         {
  53                 Ptree *parent = context_->stack.back();
  54                 Ptree *child = &parent->push_back(std::make_pair(key, Ptree()))->second;
  55                 context->stack.push_back(child);
  56         }
  57         descriptor::~descriptor()
  58         {
  59                 context_->stack.pop_back();
  60         }
  61
  62 void descriptor::populate(bigendian_file_input_stream& stream)
  63 {
  64         stream.read_unicode_string();
  65         stream.read_id_string();
  66         unsigned long element_count = stream.read_long();
  67         for (unsigned long element_index = 0; element_index < element_count; ++element_index)
  68         {
  69                 std::wstring key = stream.read_id_string();
  70                 read_value(key, stream);
  71         }
  72 }
  73
  74 void descriptor::read_value(const std::wstring& key, bigendian_file_input_stream& stream)
  75 {
  76         unsigned int type = stream.read_long();
  77
  78         switch(type)
  79         {
  80         case 'Objc':
  81                 {
  82                         descriptor desc(key, context_);
  83                         desc.populate(stream);
  84                 }
  85                 break;
  86
  87         case 'doub':
  88                 {
  89                         context_->stack.back()->put(key, stream.read_double());
  90                 }
  91                 break;
  92
  93         case 'TEXT':
  94                 {
  95                         context_->stack.back()->put(key, stream.read_unicode_string());
  96                 }
  97                 break;
  98
  99         case 'enum':
 100                 {
 101                         context_->stack.back()->put(stream.read_id_string(), stream.read_id_string());
 102                 }
 103                 break;
 104
 105         case 'long':
 106                 {
 107                         context_->stack.back()->put(key, static_cast<long>(stream.read_long()));
 108                 }
 109                 break;
 110
 111         case 'bool':
 112                 {
 113                         context_->stack.back()->put(key, stream.read_byte());
 114                 }
 115                 break;
 116
 117         case 'VlLs':
 118                 {
 119                         context::scoped_holder list(key, context_);
 120                         auto count = stream.read_long();
 121                         for(unsigned long i = 0; i < count; ++i)
 122                         {
 123                                 read_value(L"li", stream);
 124                         }
 125                 }
 126                 break;
 127
 128         case 'tdta':
 129                 {
 130                         unsigned long rawdata_length = stream.read_long();
 131                         std::vector<char> rawdata(rawdata_length);
 132                         stream.read(rawdata.data(), rawdata_length);
 133
 134                         std::wstring data_str(rawdata.begin(), rawdata.end());
 135                         context_->stack.back()->put(key, data_str);
 136                 }
 137                 break;
 138
 139         case 'UntF':
 140                 {
 141                         context::scoped_holder list(key, context_);
 142                         unsigned long unit = stream.read_long();
 143                         std::string type(reinterpret_cast<char*>(&unit), 4);
 144                         std::wstring wtype(type.rbegin(), type.rend());
 145                         context_->stack.back()->put(wtype, stream.read_double());
 146                 }
 147                 break;
 148
 149         case 'obj ':
 150         case 'GlbO':
 151         case 'type':
 152         case 'GlbC':
 153         case 'alis':
 154         default:
 155                 //descriptor type not supported yet
 156                 CASPAR_THROW_EXCEPTION(psd_file_format_exception() << msg_info("descriptor type not supported yet"));
 157         }
 158 }
 159
 160 }       //namespace psd
 161 }       //namespace caspar