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

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21
  22 #include "../../StdAfx.h"
  23
  24 #include "separated_producer.h"
  25
  26 #include <core/producer/frame_producer.h>
  27 #include <core/frame/draw_frame.h>
  28 #include <core/monitor/monitor.h>
  29
  30 #include <tbb/parallel_invoke.h>
  31
  32 #include <future>
  33
  34 namespace caspar { namespace core {
  35
  36 class separated_producer : public frame_producer_base
  37 {
  38         spl::shared_ptr<monitor::subject>       monitor_subject_;
  39         spl::shared_ptr<monitor::subject>       key_monitor_subject_    = spl::make_shared<monitor::subject>("/keyer");
  40
  41         spl::shared_ptr<frame_producer> fill_producer_;
  42         spl::shared_ptr<frame_producer> key_producer_;
  43         draw_frame                                              fill_                                           = core::draw_frame::late();
  44         draw_frame                                              key_                                            = core::draw_frame::late();
  45
  46 public:
  47         explicit separated_producer(const spl::shared_ptr<frame_producer>& fill, const spl::shared_ptr<frame_producer>& key)
  48                 : fill_producer_(fill)
  49                 , key_producer_(key)
  50         {
  51                 key_monitor_subject_->attach_parent(monitor_subject_);
  52
  53                 key_producer_->monitor_output().attach_parent(key_monitor_subject_);
  54                 fill_producer_->monitor_output().attach_parent(monitor_subject_);
  55
  56                 CASPAR_LOG(debug) << print() << L" Initialized";
  57         }
  58
  59         // frame_producer
  60
  61         draw_frame receive_impl() override
  62         {
  63                 tbb::parallel_invoke(
  64                 [&]
  65                 {
  66                         if(fill_ == core::draw_frame::late())
  67                                 fill_ = fill_producer_->receive();
  68                 },
  69                 [&]
  70                 {
  71                         if(key_ == core::draw_frame::late())
  72                                 key_ = key_producer_->receive();
  73                 });
  74
  75                 if(fill_ == core::draw_frame::late() || key_ == core::draw_frame::late()) // One of the producers is lagging, keep them in sync.
  76                         return core::draw_frame::late();
  77
  78                 auto frame = draw_frame::mask(fill_, key_);
  79
  80                 fill_ = draw_frame::late();
  81                 key_  = draw_frame::late();
  82
  83                 return frame;
  84         }
  85
  86         draw_frame last_frame()
  87         {
  88                 return draw_frame::mask(fill_producer_->last_frame(), key_producer_->last_frame());
  89         }
  90
  91         constraints& pixel_constraints() override
  92         {
  93                 return fill_producer_->pixel_constraints();
  94         }
  95
  96         uint32_t nb_frames() const override
  97         {
  98                 return std::min(fill_producer_->nb_frames(), key_producer_->nb_frames());
  99         }
 100
 101         std::wstring print() const override
 102         {
 103                 return L"separated[fill:" + fill_producer_->print() + L"|key[" + key_producer_->print() + L"]]";
 104         }
 105
 106         std::future<std::wstring> call(const std::vector<std::wstring>& params) override
 107         {
 108                 key_producer_->call(params);
 109                 return fill_producer_->call(params);
 110         }
 111
 112         std::wstring name() const override
 113         {
 114                 return L"separated";
 115         }
 116
 117         boost::property_tree::wptree info() const override
 118         {
 119                 return fill_producer_->info();;
 120         }
 121
 122         monitor::subject& monitor_output() { return *monitor_subject_; }
 123 };
 124
 125 spl::shared_ptr<frame_producer> create_separated_producer(const spl::shared_ptr<frame_producer>& fill, const spl::shared_ptr<frame_producer>& key)
 126 {
 127         return spl::make_shared<separated_producer>(fill, key);
 128 }
 129
 130 }}
 131