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

   1 /*\r
   2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 *  This file is part of CasparCG.\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 */\r
  20 \r
  21 #include "../stdafx.h"\r
  22 \r
  23 #include "layer.h"\r
  24 \r
  25 #include "frame_producer.h"\r
  26 #include "frame/basic_frame.h"\r
  27 \r
  28 namespace caspar { namespace core {\r
  29         \r
  30 struct layer::implementation\r
  31 {                               \r
  32         safe_ptr<frame_producer>        foreground_;\r
  33         safe_ptr<frame_producer>        background_;\r
  34         bool                                            is_paused_;\r
  35         int                                                     auto_play_delta_;\r
  36         int64_t                                         frame_number_;\r
  37 public:\r
  38         implementation() \r
  39                 : foreground_(frame_producer::empty())\r
  40                 , background_(frame_producer::empty())\r
  41                 , is_paused_(false)\r
  42                 , auto_play_delta_(-1){}\r
  43         \r
  44         void pause(){is_paused_ = true;}\r
  45         void resume(){is_paused_ = false;}\r
  46 \r
  47         void load(const safe_ptr<frame_producer>& producer, bool preview, int auto_play_delta)\r
  48         {               \r
  49                 background_     = producer;\r
  50 \r
  51                 if(auto_play_delta > -1)\r
  52                 {\r
  53                         if(foreground_->nb_frames() > 0)\r
  54                                 auto_play_delta_ = auto_play_delta;\r
  55                         else\r
  56                                 CASPAR_LOG(warning) << foreground_->print() << L" Producer in foreground does not support auto-play.";\r
  57                 }\r
  58 \r
  59                 if(preview) // Play the first frame and pause.\r
  60                 {                       \r
  61                         play();\r
  62                         receive();\r
  63                         pause();\r
  64                 }\r
  65 \r
  66                 if(auto_play_delta >= 0 && foreground_ == frame_producer::empty())\r
  67                         play();\r
  68         }\r
  69         \r
  70         void play()\r
  71         {                       \r
  72                 if(background_ != frame_producer::empty())\r
  73                 {\r
  74                         background_->set_leading_producer(foreground_);\r
  75                         foreground_ = background_;\r
  76                         frame_number_ = 0;\r
  77                         auto_play_delta_ = -1;\r
  78                         background_ = frame_producer::empty();\r
  79                 }\r
  80                 resume();\r
  81         }\r
  82         \r
  83         void stop()\r
  84         {\r
  85                 foreground_ = frame_producer::empty();\r
  86         }\r
  87                 \r
  88         safe_ptr<basic_frame> receive()\r
  89         {               \r
  90                 if(is_paused_)\r
  91                         return foreground_->last_frame();\r
  92                 \r
  93                 const auto frames_left = foreground_->nb_frames() - (++frame_number_) - auto_play_delta_;\r
  94 \r
  95                 auto frame = receive_and_follow(foreground_, frame_producer::NO_HINT);\r
  96                 if(frame == core::basic_frame::late())\r
  97                         return foreground_->last_frame();\r
  98                 \r
  99                 if(auto_play_delta_ == 0)\r
 100                 {\r
 101                         if(frame == core::basic_frame::eof())\r
 102                         {\r
 103                                 CASPAR_ASSERT(frames_left == 0);\r
 104 \r
 105                                 CASPAR_LOG(info) << L"Automatically playing next clip with " << auto_play_delta_ << " frames offset.";\r
 106                                 \r
 107                                 play();\r
 108                                 frame = receive();\r
 109                         }\r
 110                 }\r
 111                 else if(auto_play_delta_ > 0)\r
 112                 {\r
 113                         if(frames_left <= 0 || frame == core::basic_frame::eof())\r
 114                         {\r
 115                                 //CASPAR_ASSERT(frame != core::basic_frame::eof() && "Received early EOF. Media duration metadata incorrect.");\r
 116 \r
 117                                 CASPAR_LOG(info) << L"Automatically playing next clip with " << auto_play_delta_ << " frames offset. Frames left: " << frames_left;\r
 118                                 \r
 119                                 play();\r
 120                                 frame = receive();\r
 121                         }\r
 122                 }\r
 123                                 \r
 124                 return frame;\r
 125         }\r
 126 \r
 127         bool empty() const\r
 128         {\r
 129                 return background_ == core::frame_producer::empty() && foreground_ == core::frame_producer::empty();\r
 130         }\r
 131 };\r
 132 \r
 133 layer::layer() : impl_(new implementation()){}\r
 134 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 135 layer& layer::operator=(layer&& other)\r
 136 {\r
 137         impl_ = std::move(other.impl_);\r
 138         return *this;\r
 139 }\r
 140 layer::layer(const layer& other) : impl_(new implementation(*other.impl_)){}\r
 141 layer& layer::operator=(const layer& other)\r
 142 {\r
 143         layer temp(other);\r
 144         temp.swap(*this);\r
 145         return *this;\r
 146 }\r
 147 void layer::swap(layer& other)\r
 148 {       \r
 149         impl_.swap(other.impl_);\r
 150 }\r
 151 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
 152 void layer::play(){impl_->play();}\r
 153 void layer::pause(){impl_->pause();}\r
 154 void layer::stop(){impl_->stop();}\r
 155 safe_ptr<basic_frame> layer::receive() {return impl_->receive();}\r
 156 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 157 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 158 bool layer::empty() const {return impl_->empty();}\r
 159 }}