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 namespace caspar { namespace core {
  33
  34 class separated_producer : public frame_producer_base
  35 {
  36         monitor::basic_subject                  event_subject_;
  37         monitor::basic_subject                  key_event_subject_;
  38
  39         spl::shared_ptr<frame_producer> fill_producer_;
  40         spl::shared_ptr<frame_producer> key_producer_;
  41         draw_frame                                              fill_;
  42         draw_frame                                              key_;
  43
  44 public:
  45         explicit separated_producer(const spl::shared_ptr<frame_producer>& fill, const spl::shared_ptr<frame_producer>& key)
  46                 : key_event_subject_("keyer")
  47                 , fill_producer_(fill)
  48                 , key_producer_(key)
  49                 , fill_(core::draw_frame::late())
  50                 , key_(core::draw_frame::late())
  51         {
  52                 CASPAR_LOG(info) << print() << L" Initialized";
  53
  54                 key_event_subject_.subscribe(event_subject_);
  55
  56                 key_producer_->subscribe(key_event_subject_);
  57                 fill_producer_->subscribe(event_subject_);
  58         }
  59
  60         // frame_producer
  61
  62         draw_frame receive_impl() override
  63         {
  64                 tbb::parallel_invoke(
  65                 [&]
  66                 {
  67                         if(fill_ == core::draw_frame::late())
  68                                 fill_ = fill_producer_->receive();
  69                 },
  70                 [&]
  71                 {
  72                         if(key_ == core::draw_frame::late())
  73                                 key_ = key_producer_->receive();
  74                 });
  75
  76                 if(fill_ == core::draw_frame::late() || key_ == core::draw_frame::late()) // One of the producers is lagging, keep them in sync.
  77                         return core::draw_frame::late();
  78
  79                 auto frame = draw_frame::mask(fill_, key_);
  80
  81                 fill_ = draw_frame::late();
  82                 key_  = draw_frame::late();
  83
  84                 return frame;
  85         }
  86
  87         draw_frame last_frame()
  88         {
  89                 return draw_frame::mask(fill_producer_->last_frame(), key_producer_->last_frame());
  90         }
  91
  92         uint32_t nb_frames() const override
  93         {
  94                 return std::min(fill_producer_->nb_frames(), key_producer_->nb_frames());
  95         }
  96
  97         std::wstring print() const override
  98         {
  99                 return L"separated[fill:" + fill_producer_->print() + L"|key[" + key_producer_->print() + L"]]";
 100         }
 101
 102         boost::unique_future<std::wstring> call(const std::wstring& str) override
 103         {
 104                 key_producer_->call(str);
 105                 return fill_producer_->call(str);
 106         }
 107
 108         std::wstring name() const override
 109         {
 110                 return L"separated";
 111         }
 112
 113         boost::property_tree::wptree info() const override
 114         {
 115                 return fill_producer_->info();;
 116         }
 117
 118         void subscribe(const monitor::observable::observer_ptr& o) override
 119         {
 120                 return event_subject_.subscribe(o);
 121         }
 122
 123         void unsubscribe(const monitor::observable::observer_ptr& o) override
 124         {
 125                 return event_subject_.unsubscribe(o);
 126         }
 127 };
 128
 129 spl::shared_ptr<frame_producer> create_separated_producer(const spl::shared_ptr<frame_producer>& fill, const spl::shared_ptr<frame_producer>& key)
 130 {
 131         return spl::make_shared<separated_producer>(fill, key);
 132 }
 133
 134 }}
 135