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/property_tree/ptree.hpp>\r
  31 \r
  32 namespace caspar { namespace core {\r
  33         \r
  34 safe_ptr<basic_frame> disable_audio(const safe_ptr<basic_frame>& frame)\r
  35 {\r
  36         auto frame2 = make_safe<basic_frame>(frame);\r
  37         frame2->get_frame_transform().volume = 0.0;\r
  38         return frame2;\r
  39 }\r
  40 \r
  41 struct layer::implementation\r
  42 {                               \r
  43         safe_ptr<frame_producer>        foreground_;\r
  44         safe_ptr<frame_producer>        background_;\r
  45         int64_t                                         frame_number_;\r
  46         int32_t                                         auto_play_delta_;\r
  47         bool                                            is_paused_;\r
  48 \r
  49 public:\r
  50         implementation() \r
  51                 : foreground_(frame_producer::empty())\r
  52                 , background_(frame_producer::empty())\r
  53                 , frame_number_(0)\r
  54                 , auto_play_delta_(-1)\r
  55                 , is_paused_(false)\r
  56         {\r
  57         }\r
  58         \r
  59         void pause()\r
  60         {\r
  61                 is_paused_ = true;\r
  62         }\r
  63 \r
  64         void resume()\r
  65         {\r
  66                 is_paused_ = false;\r
  67         }\r
  68 \r
  69         void load(const safe_ptr<frame_producer>& producer, bool preview, int auto_play_delta)\r
  70         {               \r
  71                 background_              = producer;\r
  72                 auto_play_delta_ = auto_play_delta;\r
  73 \r
  74                 if(auto_play_delta_ > -1 && foreground_ == frame_producer::empty())\r
  75                         play();\r
  76 \r
  77                 if(preview) // Play the first frame and pause.\r
  78                 {                       \r
  79                         play();\r
  80                         receive(frame_producer::NO_FLAG);\r
  81                         pause();\r
  82                 }\r
  83         }\r
  84         \r
  85         void play()\r
  86         {                       \r
  87                 if(background_ != frame_producer::empty())\r
  88                 {\r
  89                         background_->set_leading_producer(foreground_);\r
  90                         \r
  91                         foreground_                     = background_;\r
  92                         background_                     = frame_producer::empty();\r
  93                         frame_number_           = 0;\r
  94                         auto_play_delta_        = -1;   \r
  95                 }\r
  96 \r
  97                 is_paused_                      = false;\r
  98         }\r
  99         \r
 100         void stop()\r
 101         {\r
 102                 foreground_                     = frame_producer::empty();\r
 103                 background_                     = background_;\r
 104                 frame_number_           = 0;\r
 105                 auto_play_delta_        = -1;\r
 106 \r
 107                 is_paused_                      = true;\r
 108         }\r
 109                 \r
 110         safe_ptr<basic_frame> receive(int flags)\r
 111         {               \r
 112                 try\r
 113                 {\r
 114                         if(is_paused_)\r
 115                                 return disable_audio(foreground_->last_frame());\r
 116                 \r
 117                         auto frame = receive_and_follow(foreground_, flags);\r
 118                         if(frame == core::basic_frame::late())\r
 119                                 return disable_audio(foreground_->last_frame());\r
 120 \r
 121                         auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(++frame_number_) - static_cast<int64_t>(auto_play_delta_);\r
 122                         if(auto_play_delta_ > -1 && frames_left < 1)\r
 123                         {\r
 124                                 play();\r
 125                                 return receive(flags);\r
 126                         }\r
 127                                 \r
 128                         return frame;\r
 129                 }\r
 130                 catch(...)\r
 131                 {\r
 132                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 133                         stop();\r
 134                         return core::basic_frame::empty();\r
 135                 }\r
 136         }\r
 137 \r
 138         boost::unique_future<std::wstring> call(bool foreground, const std::wstring& param)\r
 139         {\r
 140                 return (foreground ? foreground_ : background_)->call(param);\r
 141         }\r
 142 \r
 143         bool empty() const\r
 144         {\r
 145                 return background_ == core::frame_producer::empty() && foreground_ == core::frame_producer::empty();\r
 146         }\r
 147 \r
 148         boost::property_tree::wptree info() const\r
 149         {\r
 150                 boost::property_tree::wptree info;\r
 151                 info.add(L"status",             is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"));\r
 152                 info.add(L"auto_delta", auto_play_delta_);\r
 153                 info.add(L"frame-number", frame_number_);\r
 154 \r
 155                 auto nb_frames = foreground_->nb_frames();\r
 156 \r
 157                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);\r
 158                 info.add(L"frames-left", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : (foreground_->nb_frames() - frame_number_ - auto_play_delta_));\r
 159                 info.add_child(L"foreground.producer", foreground_->info());\r
 160                 info.add_child(L"background.producer", background_->info());\r
 161                 return info;\r
 162         }\r
 163 };\r
 164 \r
 165 layer::layer() : impl_(new implementation()){}\r
 166 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 167 layer& layer::operator=(layer&& other)\r
 168 {\r
 169         impl_ = std::move(other.impl_);\r
 170         return *this;\r
 171 }\r
 172 layer::layer(const layer& other) : impl_(new implementation(*other.impl_)){}\r
 173 layer& layer::operator=(const layer& other)\r
 174 {\r
 175         layer temp(other);\r
 176         temp.swap(*this);\r
 177         return *this;\r
 178 }\r
 179 void layer::swap(layer& other)\r
 180 {       \r
 181         impl_.swap(other.impl_);\r
 182 }\r
 183 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool preview, int auto_play_delta){return impl_->load(frame_producer, preview, auto_play_delta);}      \r
 184 void layer::play(){impl_->play();}\r
 185 void layer::pause(){impl_->pause();}\r
 186 void layer::stop(){impl_->stop();}\r
 187 bool layer::is_paused() const{return impl_->is_paused_;}\r
 188 int64_t layer::frame_number() const{return impl_->frame_number_;}\r
 189 safe_ptr<basic_frame> layer::receive(int flags) {return impl_->receive(flags);}\r
 190 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 191 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 192 bool layer::empty() const {return impl_->empty();}\r
 193 boost::unique_future<std::wstring> layer::call(bool foreground, const std::wstring& param){return impl_->call(foreground, param);}\r
 194 boost::property_tree::wptree layer::info() const{return impl_->info();}\r
 195 }}