git.sesse.net Git - casparcg/blob - core/producer/layer.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 "layer.h"\r
  25 \r
  26 #include "frame_producer.h"\r
  27 #include "frame/basic_frame.h"\r
  28 #include "frame/frame_transform.h"\r
  29 \r
  30 #include <boost/optional.hpp>\r
  31 #include <boost/property_tree/ptree.hpp>\r
  32 \r
  33 namespace caspar { namespace core {\r
  34 \r
  35 struct layer::impl\r
  36 {                               \r
  37         safe_ptr<frame_producer>        foreground_;\r
  38         safe_ptr<frame_producer>        background_;\r
  39         int64_t                                         frame_number_;\r
  40         boost::optional<int32_t>        auto_play_delta_;\r
  41         bool                                            is_paused_;\r
  42 \r
  43 public:\r
  44         impl() \r
  45                 : foreground_(frame_producer::empty())\r
  46                 , background_(frame_producer::empty())\r
  47                 , frame_number_(0)\r
  48                 , is_paused_(false)\r
  49         {\r
  50         }\r
  51         \r
  52         void pause()\r
  53         {\r
  54                 is_paused_ = true;\r
  55         }\r
  56 \r
  57         void resume()\r
  58         {\r
  59                 is_paused_ = false;\r
  60         }\r
  61 \r
  62         void load(const safe_ptr<frame_producer>& producer, bool preview, const boost::optional<int32_t>& auto_play_delta)\r
  63         {               \r
  64                 background_              = producer;\r
  65                 auto_play_delta_ = auto_play_delta;\r
  66 \r
  67                 if(auto_play_delta_ && foreground_ == frame_producer::empty())\r
  68                         play();\r
  69 \r
  70                 if(preview) // Play the first frame and pause.\r
  71                 {                       \r
  72                         play();\r
  73                         receive(frame_producer::NO_FLAG);\r
  74                         pause();\r
  75                 }\r
  76         }\r
  77         \r
  78         void play()\r
  79         {                       \r
  80                 if(background_ != frame_producer::empty())\r
  81                 {\r
  82                         background_->set_leading_producer(foreground_);\r
  83                         \r
  84                         foreground_                     = background_;\r
  85                         background_                     = frame_producer::empty();\r
  86                         frame_number_           = 0;\r
  87                         auto_play_delta_        = nullptr;      \r
  88                 }\r
  89 \r
  90                 is_paused_                      = false;\r
  91         }\r
  92         \r
  93         void stop()\r
  94         {\r
  95                 foreground_                     = frame_producer::empty();\r
  96                 background_                     = background_;\r
  97                 frame_number_           = 0;\r
  98                 auto_play_delta_        = nullptr;      \r
  99 \r
 100                 is_paused_                      = true;\r
 101         }\r
 102                 \r
 103         safe_ptr<basic_frame> receive(int flags)\r
 104         {               \r
 105                 try\r
 106                 {\r
 107                         if(is_paused_)\r
 108                                 return disable_audio(foreground_->last_frame());\r
 109                 \r
 110                         auto frame = receive_and_follow(foreground_, flags);\r
 111                         if(frame == core::basic_frame::late())\r
 112                                 return disable_audio(foreground_->last_frame());\r
 113 \r
 114                         if(auto_play_delta_)\r
 115                         {\r
 116                                 auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(++frame_number_) - static_cast<int64_t>(*auto_play_delta_);\r
 117                                 if(frames_left < 1)\r
 118                                 {\r
 119                                         play();\r
 120                                         return receive(flags);\r
 121                                 }\r
 122                         }\r
 123                                 \r
 124                         return frame;\r
 125                 }\r
 126                 catch(...)\r
 127                 {\r
 128                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 129                         stop();\r
 130                         return core::basic_frame::empty();\r
 131                 }\r
 132         }\r
 133 \r
 134         boost::unique_future<std::wstring> call(bool foreground, const std::wstring& param)\r
 135         {\r
 136                 return (foreground ? foreground_ : background_)->call(param);\r
 137         }\r
 138 \r
 139         bool empty() const\r
 140         {\r
 141                 return background_ == core::frame_producer::empty() && foreground_ == core::frame_producer::empty();\r
 142         }\r
 143 \r
 144         boost::property_tree::wptree info() const\r
 145         {\r
 146                 boost::property_tree::wptree info;\r
 147                 info.add(L"status",             is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"));\r
 148                 info.add(L"auto_delta", auto_play_delta_);\r
 149                 info.add(L"frame-number", frame_number_);\r
 150 \r
 151                 auto nb_frames = foreground_->nb_frames();\r
 152 \r
 153                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);\r
 154                 info.add(L"frames-left", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : (foreground_->nb_frames() - frame_number_ - auto_play_delta_));\r
 155                 info.add_child(L"foreground.producer", foreground_->info());\r
 156                 info.add_child(L"background.producer", background_->info());\r
 157                 return info;\r
 158         }\r
 159 };\r
 160 \r
 161 layer::layer() : impl_(new impl()){}\r
 162 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 163 layer& layer::operator=(layer&& other)\r
 164 {\r
 165         impl_ = std::move(other.impl_);\r
 166         return *this;\r
 167 }\r
 168 layer::layer(const layer& other) : impl_(new impl(*other.impl_)){}\r
 169 layer& layer::operator=(const layer& other)\r
 170 {\r
 171         layer temp(other);\r
 172         temp.swap(*this);\r
 173         return *this;\r
 174 }\r
 175 void layer::swap(layer& other)\r
 176 {       \r
 177         impl_.swap(other.impl_);\r
 178 }\r
 179 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool preview, const boost::optional<int32_t>& auto_play_delta){return impl_->load(frame_producer, preview, auto_play_delta);}  \r
 180 void layer::play(){impl_->play();}\r
 181 void layer::pause(){impl_->pause();}\r
 182 void layer::stop(){impl_->stop();}\r
 183 bool layer::is_paused() const{return impl_->is_paused_;}\r
 184 int64_t layer::frame_number() const{return impl_->frame_number_;}\r
 185 safe_ptr<basic_frame> layer::receive(int flags) {return impl_->receive(flags);}\r
 186 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 187 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 188 bool layer::empty() const {return impl_->empty();}\r
 189 boost::unique_future<std::wstring> layer::call(bool foreground, const std::wstring& param){return impl_->call(foreground, param);}\r
 190 boost::property_tree::wptree layer::info() const{return impl_->info();}\r
 191 }}