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