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