git.sesse.net Git - casparcg/blob - core/producer/playlist/playlist_producer.cpp

   1 /*\r
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 * This file is part of CasparCG (www.casparcg.com).\r
   5 *\r
   6 * CasparCG is free software: you can redistribute it and/or modify\r
   7 * it under the terms of the GNU General Public License as published by\r
   8 * the Free Software Foundation, either version 3 of the License, or\r
   9 * (at your option) any later version.\r
  10 *\r
  11 * CasparCG is distributed in the hope that it will be useful,\r
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14 * GNU General Public License for more details.\r
  15 *\r
  16 * You should have received a copy of the GNU General Public License\r
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.\r
  18 *\r
  19 * Author: Robert Nagy, ronag89@gmail.com\r
  20 */\r
  21 \r
  22 #include "../../stdafx.h"\r
  23 \r
  24 #include "playlist_producer.h"\r
  25 \r
  26 #include <core/producer/frame_producer.h>\r
  27 #include <core/producer/frame/basic_frame.h>\r
  28 \r
  29 #include <boost/regex.hpp>\r
  30 #include <boost/property_tree/ptree.hpp>\r
  31 \r
  32 #include <deque>\r
  33 \r
  34 namespace caspar { namespace core {     \r
  35 \r
  36 struct playlist_producer : public frame_producer\r
  37 {                               \r
  38         safe_ptr<frame_factory>                         factory_;\r
  39         safe_ptr<basic_frame>                           last_frame_;\r
  40         safe_ptr<frame_producer>                        current_;\r
  41         bool                                                            loop_;\r
  42 \r
  43         std::deque<safe_ptr<frame_producer>> producers_;\r
  44 \r
  45         playlist_producer(const safe_ptr<frame_factory>& factory, bool loop) \r
  46                 : factory_(factory)\r
  47                 , last_frame_(basic_frame::empty())\r
  48                 , current_(frame_producer::empty())\r
  49                 , loop_(loop)\r
  50         {\r
  51         }\r
  52 \r
  53         // frame_producer\r
  54         \r
  55         virtual safe_ptr<basic_frame> receive(int hints) override\r
  56         {\r
  57                 if(current_ == frame_producer::empty() && !producers_.empty())\r
  58                         next();\r
  59 \r
  60                 auto frame = current_->receive(hints);\r
  61                 if(frame == basic_frame::eof())\r
  62                 {\r
  63                         current_ = frame_producer::empty();\r
  64                         return receive(hints);\r
  65                 }\r
  66 \r
  67                 return last_frame_ = frame;\r
  68         }\r
  69 \r
  70         virtual safe_ptr<core::basic_frame> last_frame() const override\r
  71         {\r
  72                 return disable_audio(last_frame_);\r
  73         }\r
  74 \r
  75         virtual std::wstring print() const override\r
  76         {\r
  77                 return L"playlist[" + current_->print() + L"]";\r
  78         }       \r
  79 \r
  80         virtual boost::property_tree::wptree info() const override\r
  81         {\r
  82                 boost::property_tree::wptree info;\r
  83                 info.add(L"type", L"playlist-producer");\r
  84                 return info;\r
  85         }\r
  86 \r
  87         virtual uint32_t nb_frames() const  override\r
  88         {\r
  89                 return std::numeric_limits<uint32_t>::max();\r
  90         }\r
  91         \r
  92         virtual boost::unique_future<std::wstring> call(const std::wstring& param) override\r
  93         {\r
  94                 boost::promise<std::wstring> promise;\r
  95                 promise.set_value(do_call(param));\r
  96                 return promise.get_future();\r
  97         }       \r
  98 \r
  99         // playlist_producer\r
 100 \r
 101         std::wstring do_call(const std::wstring& param)\r
 102         {               \r
 103                 static const boost::wregex push_front_exp       (L"PUSH_FRONT (?<PARAM>.+)");           \r
 104                 static const boost::wregex push_back_exp        (L"(PUSH_BACK|PUSH) (?<PARAM>.+)");\r
 105                 static const boost::wregex pop_front_exp        (L"POP_FRONT");         \r
 106                 static const boost::wregex pop_back_exp         (L"(POP_BACK|POP)");\r
 107                 static const boost::wregex clear_exp            (L"CLEAR");\r
 108                 static const boost::wregex next_exp                     (L"NEXT");\r
 109                 static const boost::wregex insert_exp           (L"INSERT (?<POS>\\d+) (?<PARAM>.+)");  \r
 110                 static const boost::wregex remove_exp           (L"REMOVE (?<POS>\\d+) (?<PARAM>.+)");  \r
 111                 static const boost::wregex list_exp                     (L"LIST");                      \r
 112                 static const boost::wregex loop_exp                     (L"LOOP\\s*(?<VALUE>\\d?)");\r
 113                 \r
 114                 boost::wsmatch what;\r
 115 \r
 116                 if(boost::regex_match(param, what, push_front_exp))\r
 117                         return push_front(what["PARAM"].str()); \r
 118                 else if(boost::regex_match(param, what, push_back_exp))\r
 119                         return push_back(what["PARAM"].str()); \r
 120                 if(boost::regex_match(param, what, pop_front_exp))\r
 121                         return pop_front(); \r
 122                 else if(boost::regex_match(param, what, pop_back_exp))\r
 123                         return pop_back(); \r
 124                 else if(boost::regex_match(param, what, clear_exp))\r
 125                         return clear();\r
 126                 else if(boost::regex_match(param, what, next_exp))\r
 127                         return next(); \r
 128                 else if(boost::regex_match(param, what, insert_exp))\r
 129                         return insert(boost::lexical_cast<size_t>(what["POS"].str()), what["PARAM"].str());\r
 130                 else if(boost::regex_match(param, what, remove_exp))\r
 131                         return erase(boost::lexical_cast<size_t>(what["POS"].str()));\r
 132                 else if(boost::regex_match(param, what, list_exp))\r
 133                         return list();\r
 134                 else if(boost::regex_match(param, what, loop_exp))\r
 135                 {\r
 136                         if(!what["VALUE"].str().empty())\r
 137                                 loop_ = boost::lexical_cast<bool>(what["VALUE"].str());\r
 138                         return boost::lexical_cast<std::wstring>(loop_);\r
 139                 }\r
 140 \r
 141                 BOOST_THROW_EXCEPTION(invalid_argument());\r
 142         }\r
 143         \r
 144         std::wstring push_front(const std::wstring& str)\r
 145         {\r
 146                 producers_.push_front(create_producer(factory_, str)); \r
 147                 return L"";\r
 148         }\r
 149 \r
 150         std::wstring  push_back(const std::wstring& str)\r
 151         {\r
 152                 producers_.push_back(create_producer(factory_, str)); \r
 153                 return L"";\r
 154         }\r
 155 \r
 156         std::wstring pop_front()\r
 157         {\r
 158                 producers_.pop_front();\r
 159                 return L"";\r
 160         }\r
 161 \r
 162         std::wstring pop_back()\r
 163         {\r
 164                 producers_.pop_back();\r
 165                 return L"";\r
 166         }\r
 167         \r
 168         std::wstring clear()\r
 169         {\r
 170                 producers_.clear();\r
 171                 return L"";\r
 172         }\r
 173 \r
 174         std::wstring next()\r
 175         {\r
 176                 if(!producers_.empty())\r
 177                 {\r
 178                         current_ = producers_.front();\r
 179                         producers_.pop_front();\r
 180                         //if(loop_)\r
 181                         //      producers_.push_back(current_);\r
 182                 }\r
 183                 return L"";\r
 184         }\r
 185         \r
 186         std::wstring  insert(size_t pos, const std::wstring& str)\r
 187         {\r
 188                 if(pos >= producers_.size())\r
 189                         BOOST_THROW_EXCEPTION(out_of_range());\r
 190                 producers_.insert(std::begin(producers_) + pos, create_producer(factory_, str));\r
 191                 return L"";\r
 192         }\r
 193 \r
 194         std::wstring  erase(size_t pos)\r
 195         {\r
 196                 if(pos >= producers_.size())\r
 197                         BOOST_THROW_EXCEPTION(out_of_range());\r
 198                 producers_.erase(std::begin(producers_) + pos);\r
 199                 return L"";\r
 200         }\r
 201 \r
 202         std::wstring list() const\r
 203         {\r
 204                 std::wstring result = L"<playlist>\n";\r
 205                 BOOST_FOREACH(auto& producer, producers_)               \r
 206                         result += L"\t<producer>" + producer->print() + L"</producer>\n";\r
 207                 return result + L"</playlist>";\r
 208         }\r
 209 };\r
 210 \r
 211 safe_ptr<frame_producer> create_playlist_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 212 {\r
 213         if(boost::range::find(params, L"[PLAYLIST]") == params.end())\r
 214                 return core::frame_producer::empty();\r
 215 \r
 216         bool loop = boost::range::find(params, L"LOOP") != params.end();\r
 217 \r
 218         return make_safe<playlist_producer>(frame_factory, loop);\r
 219 }\r
 220 \r
 221 }}\r
 222 \r