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                 , frame_number_(0){}\r
  44         \r
  45         void pause()\r
  46         {\r
  47                 is_paused_ = true;\r
  48         }\r
  49 \r
  50         void resume()\r
  51         {\r
  52                 is_paused_ = false;\r
  53         }\r
  54 \r
  55         void load(const safe_ptr<frame_producer>& producer, bool preview, int auto_play_delta)\r
  56         {               \r
  57                 background_              = producer;\r
  58                 auto_play_delta_ = auto_play_delta;\r
  59 \r
  60                 if(preview) // Play the first frame and pause.\r
  61                 {                       \r
  62                         play();\r
  63                         receive();\r
  64                         pause();\r
  65                 }\r
  66         }\r
  67         \r
  68         void play()\r
  69         {                       \r
  70                 if(background_ != frame_producer::empty())\r
  71                 {\r
  72                         background_->set_leading_producer(foreground_);\r
  73                         foreground_ = background_;\r
  74                         frame_number_ = 0;\r
  75                         auto_play_delta_ = -1;\r
  76                         background_ = frame_producer::empty();\r
  77                 }\r
  78                 resume();\r
  79         }\r
  80         \r
  81         void stop()\r
  82         {\r
  83                 foreground_ = frame_producer::empty();\r
  84         }\r
  85                 \r
  86         safe_ptr<basic_frame> receive()\r
  87         {               \r
  88                 if(is_paused_)\r
  89                         return foreground_->last_frame();\r
  90                 \r
  91                 const auto frames_left = foreground_->nb_frames() - (++frame_number_) - auto_play_delta_;\r
  92 \r
  93                 auto frame = receive_and_follow(foreground_, frame_producer::NO_HINT);\r
  94                 if(frame == core::basic_frame::late())\r
  95                         return foreground_->last_frame();\r
  96                 \r
  97                 if(auto_play_delta_ >= 0)\r
  98                 {\r
  99                         if(frames_left <= 0 || frame == core::basic_frame::eof())\r
 100                         {\r
 101                                 //CASPAR_ASSERT(frame != core::basic_frame::eof() && "Received early EOF. Media duration metadata incorrect.");\r
 102 \r
 103                                 CASPAR_LOG(info) << L"Automatically playing next clip with " << auto_play_delta_ << " frames offset. Frames left: " << frames_left;\r
 104                                 \r
 105                                 play();\r
 106                                 frame = receive();\r
 107                         }\r
 108                 }\r
 109                                 \r
 110                 return frame;\r
 111         }\r
 112 \r
 113         bool empty() const\r
 114         {\r
 115                 return background_ == core::frame_producer::empty() && foreground_ == core::frame_producer::empty();\r
 116         }\r
 117 };\r
 118 \r
 119 layer::layer() : impl_(new implementation()){}\r
 120 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 121 layer& layer::operator=(layer&& other)\r
 122 {\r
 123         impl_ = std::move(other.impl_);\r
 124         return *this;\r
 125 }\r
 126 layer::layer(const layer& other) : impl_(new implementation(*other.impl_)){}\r
 127 layer& layer::operator=(const layer& other)\r
 128 {\r
 129         layer temp(other);\r
 130         temp.swap(*this);\r
 131         return *this;\r
 132 }\r
 133 void layer::swap(layer& other)\r
 134 {       \r
 135         impl_.swap(other.impl_);\r
 136 }\r
 137 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
 138 void layer::play(){impl_->play();}\r
 139 void layer::pause(){impl_->pause();}\r
 140 void layer::stop(){impl_->stop();}\r
 141 safe_ptr<basic_frame> layer::receive() {return impl_->receive();}\r
 142 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 143 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 144 bool layer::empty() const {return impl_->empty();}\r
 145 }}