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         int                                                     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(preview) // Play the first frame and pause.\r
  67                 {                       \r
  68                         play();\r
  69                         receive(frame_producer::NO_HINT);\r
  70                         pause();\r
  71                 }\r
  72         }\r
  73         \r
  74         void play()\r
  75         {                       \r
  76                 if(background_ != frame_producer::empty())\r
  77                 {\r
  78                         background_->set_leading_producer(foreground_);\r
  79                         \r
  80                         foreground_                     = background_;\r
  81                         background_                     = frame_producer::empty();\r
  82                         frame_number_           = 0;\r
  83                         auto_play_delta_        = -1;   \r
  84                 }\r
  85 \r
  86                 is_paused_                      = false;\r
  87         }\r
  88         \r
  89         void stop()\r
  90         {\r
  91                 foreground_                     = frame_producer::empty();\r
  92                 background_                     = background_;\r
  93                 frame_number_           = 0;\r
  94                 auto_play_delta_        = -1;\r
  95 \r
  96                 is_paused_                      = true;\r
  97         }\r
  98                 \r
  99         safe_ptr<basic_frame> receive(int hints)\r
 100         {               \r
 101                 try\r
 102                 {\r
 103                         if(is_paused_)\r
 104                                 return disable_audio(foreground_->last_frame());\r
 105                 \r
 106                         auto frame = receive_and_follow(foreground_, hints);\r
 107                         if(frame == core::basic_frame::late())\r
 108                                 return foreground_->last_frame();\r
 109 \r
 110                         auto frames_left = foreground_->nb_frames() - (++frame_number_) - auto_play_delta_;\r
 111                         if(auto_play_delta_ > -1 && frames_left < 1)\r
 112                         {\r
 113                                 play();\r
 114                                 return receive(hints);\r
 115                         }\r
 116                                 \r
 117                         return frame;\r
 118                 }\r
 119                 catch(...)\r
 120                 {\r
 121                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 122                         stop();\r
 123                         return core::basic_frame::empty();\r
 124                 }\r
 125         }\r
 126 \r
 127         boost::unique_future<std::wstring> call(bool foreground, const std::wstring& param)\r
 128         {\r
 129                 return (foreground ? foreground_ : background_)->call(param);\r
 130         }\r
 131 \r
 132         bool empty() const\r
 133         {\r
 134                 return background_ == core::frame_producer::empty() && foreground_ == core::frame_producer::empty();\r
 135         }\r
 136 \r
 137         boost::property_tree::wptree info() const\r
 138         {\r
 139                 boost::property_tree::wptree info;\r
 140                 info.add(L"status",             is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"));\r
 141                 info.add(L"auto_delta", auto_play_delta_);\r
 142                 info.add(L"frame-number", frame_number_);\r
 143 \r
 144                 auto nb_frames = foreground_->nb_frames();\r
 145 \r
 146                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);\r
 147                 info.add(L"frames-left", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : (foreground_->nb_frames() - frame_number_ - auto_play_delta_));\r
 148                 info.add_child(L"foreground", foreground_->info());\r
 149                 info.add_child(L"background", background_->info());\r
 150                 return info;\r
 151         }\r
 152 };\r
 153 \r
 154 layer::layer() : impl_(new implementation()){}\r
 155 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 156 layer& layer::operator=(layer&& other)\r
 157 {\r
 158         impl_ = std::move(other.impl_);\r
 159         return *this;\r
 160 }\r
 161 layer::layer(const layer& other) : impl_(new implementation(*other.impl_)){}\r
 162 layer& layer::operator=(const layer& other)\r
 163 {\r
 164         layer temp(other);\r
 165         temp.swap(*this);\r
 166         return *this;\r
 167 }\r
 168 void layer::swap(layer& other)\r
 169 {       \r
 170         impl_.swap(other.impl_);\r
 171 }\r
 172 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
 173 void layer::play(){impl_->play();}\r
 174 void layer::pause(){impl_->pause();}\r
 175 void layer::stop(){impl_->stop();}\r
 176 bool layer::is_paused() const{return impl_->is_paused_;}\r
 177 int64_t layer::frame_number() const{return impl_->frame_number_;}\r
 178 safe_ptr<basic_frame> layer::receive(int hints) {return impl_->receive(hints);}\r
 179 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 180 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 181 bool layer::empty() const {return impl_->empty();}\r
 182 boost::unique_future<std::wstring> layer::call(bool foreground, const std::wstring& param){return impl_->call(foreground, param);}\r
 183 boost::property_tree::wptree layer::info() const{return impl_->info();}\r
 184 }}