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 <common/log.h>
  26
  27 #include <boost/property_tree/ptree.hpp>
  28 #include <boost/property_tree/xml_parser.hpp>
  29
  30 #include <memory>
  31
  32 namespace caspar { namespace psd {
  33
  34         std::wstring debug_ptree(const boost::property_tree::wptree& tree)
  35         {
  36                 std::wstringstream str;
  37                 boost::property_tree::xml_writer_settings<std::wstring> w(' ', 3);
  38                 boost::property_tree::write_xml(str, tree, w);
  39                 str.flush();
  40                 return str.str();
  41         }
  42
  43         class descriptor::context::scoped_holder
  44         {
  45                 descriptor::context::ptr_type ctx_;
  46         public:
  47                 explicit scoped_holder(const std::wstring& key, descriptor::context::ptr_type ctx) : ctx_(ctx)
  48                 {
  49                         Ptree *parent = ctx_->stack.back();
  50                         Ptree *child = &parent->push_back(std::make_pair(key, Ptree()))->second;
  51                         ctx_->stack.push_back(child);
  52                 }
  53                 ~scoped_holder()
  54                 {
  55                         ctx_->stack.pop_back();
  56                 }
  57         };
  58
  59         descriptor::descriptor(const std::wstring& debug_name) : context_(std::make_shared<context>(debug_name))
  60         {
  61                 context_->stack.push_back(&context_->root);
  62         }
  63         descriptor::descriptor(const std::wstring& key, context::ptr_type context) : context_(context)
  64         {
  65                 Ptree *parent = context_->stack.back();
  66                 Ptree *child = &parent->push_back(std::make_pair(key, Ptree()))->second;
  67                 context->stack.push_back(child);
  68         }
  69         descriptor::~descriptor()
  70         {
  71                 context_->stack.pop_back();
  72         }
  73
  74 void descriptor::populate(bigendian_file_input_stream& stream)
  75 {
  76         stream.read_unicode_string();
  77         stream.read_id_string();
  78         unsigned long element_count = stream.read_long();
  79         for (unsigned long element_index = 0; element_index < element_count; ++element_index)
  80         {
  81                 std::wstring key = stream.read_id_string();
  82                 read_value(key, stream);
  83         }
  84
  85         if (context_->stack.size() == 1)
  86                 CASPAR_LOG(trace) << context_->debug_name << L":\n\n" << debug_ptree(context_->root) << L"\n";
  87 }
  88
  89 void descriptor::read_value(const std::wstring& key, bigendian_file_input_stream& stream)
  90 {
  91         unsigned int type = stream.read_long();
  92
  93         switch(type)
  94         {
  95         case 'Objc':
  96                 {
  97                         descriptor desc(key, context_);
  98                         desc.populate(stream);
  99                 }
 100                 break;
 101
 102         case 'doub':
 103                 {
 104                         context_->stack.back()->put(key, stream.read_double());
 105                 }
 106                 break;
 107
 108         case 'TEXT':
 109                 {
 110                         context_->stack.back()->put(key, stream.read_unicode_string());
 111                 }
 112                 break;
 113
 114         case 'enum':
 115                 {
 116                         context_->stack.back()->put(stream.read_id_string(), stream.read_id_string());
 117                 }
 118                 break;
 119
 120         case 'long':
 121                 {
 122                         context_->stack.back()->put(key, static_cast<long>(stream.read_long()));
 123                 }
 124                 break;
 125
 126         case 'bool':
 127                 {
 128                         context_->stack.back()->put(key, stream.read_byte());
 129                 }
 130                 break;
 131
 132         case 'VlLs':
 133                 {
 134                         context::scoped_holder list(key, context_);
 135                         auto count = stream.read_long();
 136                         for(unsigned long i = 0; i < count; ++i)
 137                         {
 138                                 read_value(L"li", stream);
 139                         }
 140                 }
 141                 break;
 142
 143         case 'tdta':
 144                 {
 145                         unsigned long rawdata_length = stream.read_long();
 146                         std::vector<char> rawdata(rawdata_length);
 147                         stream.read(rawdata.data(), rawdata_length);
 148
 149                         std::wstring data_str(rawdata.begin(), rawdata.end());
 150                         context_->stack.back()->put(key, data_str);
 151                 }
 152                 break;
 153
 154         case 'UntF':
 155                 {
 156                         context::scoped_holder list(key, context_);
 157                         unsigned long unit = stream.read_long();
 158                         std::string type(reinterpret_cast<char*>(&unit), 4);
 159                         std::wstring wtype(type.rbegin(), type.rend());
 160                         context_->stack.back()->put(wtype, stream.read_double());
 161                 }
 162                 break;
 163
 164         case 'obj ':
 165         case 'GlbO':
 166         case 'type':
 167         case 'GlbC':
 168         case 'alis':
 169         default:
 170                 //descriptor type not supported yet
 171                 CASPAR_THROW_EXCEPTION(psd_file_format_exception() << msg_info("descriptor type not supported yet"));
 172         }
 173 }
 174
 175 }       //namespace psd
 176 }       //namespace caspar