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         spl::shared_ptr<monitor::subject>       monitor_subject_;
  37         spl::shared_ptr<monitor::subject>       key_monitor_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_monitor_subject_(spl::make_shared<monitor::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_monitor_subject_->attach_parent(monitor_subject_);
  55
  56                 key_producer_->monitor_output().attach_parent(key_monitor_subject_);
  57                 fill_producer_->monitor_output().attach_parent(monitor_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         draw_frame create_thumbnail_frame()
  93         {
  94                 auto fill_frame = fill_producer_->create_thumbnail_frame();
  95                 auto key_frame = key_producer_->create_thumbnail_frame();
  96
  97                 if (fill_frame == draw_frame::empty() || key_frame == draw_frame::empty())
  98                         return draw_frame::empty();
  99
 100                 if (fill_frame == draw_frame::late() || key_frame == draw_frame::late())
 101                         return draw_frame::late();
 102
 103                 return draw_frame::mask(fill_frame, key_frame);
 104         }
 105
 106         constraints& pixel_constraints() override
 107         {
 108                 return fill_producer_->pixel_constraints();
 109         }
 110
 111         uint32_t nb_frames() const override
 112         {
 113                 return std::min(fill_producer_->nb_frames(), key_producer_->nb_frames());
 114         }
 115
 116         std::wstring print() const override
 117         {
 118                 return L"separated[fill:" + fill_producer_->print() + L"|key[" + key_producer_->print() + L"]]";
 119         }
 120
 121         boost::unique_future<std::wstring> call(const std::vector<std::wstring>& params) override
 122         {
 123                 key_producer_->call(params);
 124                 return fill_producer_->call(params);
 125         }
 126
 127         std::wstring name() const override
 128         {
 129                 return L"separated";
 130         }
 131
 132         boost::property_tree::wptree info() const override
 133         {
 134                 return fill_producer_->info();;
 135         }
 136
 137         monitor::subject& monitor_output() { return *monitor_subject_; }
 138 };
 139
 140 spl::shared_ptr<frame_producer> create_separated_producer(const spl::shared_ptr<frame_producer>& fill, const spl::shared_ptr<frame_producer>& key)
 141 {
 142         return spl::make_shared<separated_producer>(fill, key);
 143 }
 144
 145 }}
 146