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         safe_ptr<core::basic_frame> last_frame_;\r
  38 \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                 , frame_number_(0)\r
  46                 , last_frame_(core::basic_frame::empty()){}\r
  47         \r
  48         void pause()\r
  49         {\r
  50                 is_paused_ = true;\r
  51         }\r
  52 \r
  53         void resume()\r
  54         {\r
  55                 is_paused_ = false;\r
  56         }\r
  57 \r
  58         void load(const safe_ptr<frame_producer>& producer, bool preview, int auto_play_delta)\r
  59         {               \r
  60                 background_              = producer;\r
  61                 auto_play_delta_ = auto_play_delta;\r
  62 \r
  63                 if(preview) // Play the first frame and pause.\r
  64                 {                       \r
  65                         play();\r
  66                         receive();\r
  67                         pause();\r
  68                 }\r
  69         }\r
  70         \r
  71         void play()\r
  72         {                       \r
  73                 if(background_ != frame_producer::empty())\r
  74                 {\r
  75                         background_->set_leading_producer(foreground_);\r
  76                         foreground_ = background_;\r
  77                         frame_number_ = 0;\r
  78                         auto_play_delta_ = -1;\r
  79                         background_ = frame_producer::empty();\r
  80                 }\r
  81                 resume();\r
  82         }\r
  83         \r
  84         void stop()\r
  85         {\r
  86                 foreground_ = frame_producer::empty();\r
  87                 frame_number_ = 0;\r
  88                 last_frame_ = core::basic_frame::empty();\r
  89         }\r
  90                 \r
  91         safe_ptr<basic_frame> receive()\r
  92         {               \r
  93                 try\r
  94                 {\r
  95                         if(is_paused_)\r
  96                                 return disable_audio(last_frame_);\r
  97                 \r
  98                         const auto frames_left = foreground_->nb_frames() - (++frame_number_) - auto_play_delta_;\r
  99 \r
 100                         auto frame = receive_and_follow(foreground_, frame_producer::NO_HINT);\r
 101                         if(frame == core::basic_frame::late())\r
 102                                 return foreground_->last_frame();\r
 103                 \r
 104                         if(auto_play_delta_ >= 0)\r
 105                         {\r
 106                                 CASPAR_ASSERT(background_ != core::frame_producer::empty());\r
 107                                 if(frames_left <= 0 || frame == core::basic_frame::eof())\r
 108                                 {\r
 109                                         //CASPAR_ASSERT(frame != core::basic_frame::eof() && "Received early EOF. Media duration metadata incorrect.");\r
 110 \r
 111                                         CASPAR_LOG(info) << L"Automatically playing next clip with " << auto_play_delta_ << " frames offset. Frames left: " << frames_left;\r
 112                                 \r
 113                                         play();\r
 114                                         frame = receive();\r
 115                                 }\r
 116                         }\r
 117 \r
 118                         if(frame == core::basic_frame::eof())\r
 119                         {\r
 120                                 pause();\r
 121                                 return receive();\r
 122                         }\r
 123                                 \r
 124                         return last_frame_ = frame;\r
 125                 }\r
 126                 catch(...)\r
 127                 {\r
 128                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 129                         stop();\r
 130                         return core::basic_frame::empty();\r
 131                 }\r
 132         }\r
 133 \r
 134         layer_status status() const\r
 135         {\r
 136                 layer_status status;\r
 137                 status.foreground        = foreground_->print();\r
 138                 status.background        = background_->print();\r
 139                 status.is_paused         = is_paused_;\r
 140                 status.total_frames      = foreground_->nb_frames();\r
 141                 status.current_frame = frame_number_;\r
 142 \r
 143                 return status;\r
 144         }\r
 145 \r
 146         bool empty() const\r
 147         {\r
 148                 return background_ == core::frame_producer::empty() && foreground_ == core::frame_producer::empty();\r
 149         }\r
 150 };\r
 151 \r
 152 layer::layer() : impl_(new implementation()){}\r
 153 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 154 layer& layer::operator=(layer&& other)\r
 155 {\r
 156         impl_ = std::move(other.impl_);\r
 157         return *this;\r
 158 }\r
 159 layer::layer(const layer& other) : impl_(new implementation(*other.impl_)){}\r
 160 layer& layer::operator=(const layer& other)\r
 161 {\r
 162         layer temp(other);\r
 163         temp.swap(*this);\r
 164         return *this;\r
 165 }\r
 166 void layer::swap(layer& other)\r
 167 {       \r
 168         impl_.swap(other.impl_);\r
 169 }\r
 170 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
 171 void layer::play(){impl_->play();}\r
 172 void layer::pause(){impl_->pause();}\r
 173 void layer::stop(){impl_->stop();}\r
 174 bool layer::is_paused() const{return impl_->is_paused_;}\r
 175 int64_t layer::frame_number() const{return impl_->frame_number_;}\r
 176 layer_status layer::status() const {return impl_->status();}\r
 177 safe_ptr<basic_frame> layer::receive() {return impl_->receive();}\r
 178 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 179 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 180 bool layer::empty() const {return impl_->empty();}\r
 181 }}