2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
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4 * This file is part of CasparCG (www.casparcg.com).
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6 * CasparCG is free software: you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation, either version 3 of the License, or
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9 * (at your option) any later version.
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11 * CasparCG is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
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19 * Author: Robert Nagy, ronag89@gmail.com
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22 #include "../../stdafx.h"
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24 #include "transition_producer.h"
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26 #include "../frame_producer.h"
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27 #include "../../frame/draw_frame.h"
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28 #include "../../frame/frame_transform.h"
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29 #include "../../monitor/monitor.h"
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31 #include <tbb/parallel_invoke.h>
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33 namespace caspar { namespace core {
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35 struct transition_producer : public frame_producer
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37 spl::shared_ptr<monitor::subject> event_subject_;
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38 const field_mode mode_;
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41 const transition_info info_;
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43 spl::shared_ptr<frame_producer> dest_producer_;
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44 spl::shared_ptr<frame_producer> source_producer_;
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46 spl::shared_ptr<draw_frame> last_frame_;
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48 explicit transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& dest, const transition_info& info)
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52 , dest_producer_(dest)
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53 , source_producer_(frame_producer::empty())
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54 , last_frame_(draw_frame::empty())
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56 dest->subscribe(event_subject_);
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61 virtual spl::shared_ptr<frame_producer> get_following_producer() const override
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63 return dest_producer_;
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66 virtual void set_leading_producer(const spl::shared_ptr<frame_producer>& producer) override
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68 source_producer_ = producer;
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71 virtual spl::shared_ptr<draw_frame> receive(int flags) override
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73 if(++current_frame_ >= info_.duration)
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74 return draw_frame::eof();
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76 *event_subject_ << monitor::event("transition/frame") % current_frame_ % info_.duration
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77 << monitor::event("transition/type") % [&]() -> std::string
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79 switch(info_.type.value())
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81 case transition_type::mix: return "mix";
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82 case transition_type::wipe: return "wipe";
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83 case transition_type::slide: return "slide";
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84 case transition_type::push: return "push";
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85 case transition_type::cut: return "cut";
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86 default: return "n/a";
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90 auto dest = draw_frame::empty();
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91 auto source = draw_frame::empty();
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93 tbb::parallel_invoke(
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96 dest = dest_producer_->receive(flags);
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97 if(dest == core::draw_frame::late())
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98 dest = dest_producer_->last_frame();
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102 source = source_producer_->receive(flags);
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103 if(source == core::draw_frame::late())
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104 source = source_producer_->last_frame();
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107 return compose(dest, source);
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110 virtual spl::shared_ptr<core::draw_frame> last_frame() const override
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112 return last_frame_;
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115 virtual uint32_t nb_frames() const override
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117 return get_following_producer()->nb_frames();
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120 virtual std::wstring print() const override
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122 return L"transition[" + source_producer_->print() + L"=>" + dest_producer_->print() + L"]";
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125 virtual std::wstring name() const override
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127 return L"transition";
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130 boost::property_tree::wptree info() const override
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132 boost::property_tree::wptree info;
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133 info.add(L"type", L"transition-producer");
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134 info.add_child(L"source.producer", source_producer_->info());
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135 info.add_child(L"destination.producer", dest_producer_->info());
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139 // transition_producer
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141 spl::shared_ptr<draw_frame> compose(const spl::shared_ptr<draw_frame>& dest_frame, const spl::shared_ptr<draw_frame>& src_frame)
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143 if(info_.type == transition_type::cut)
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146 const double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, static_cast<double>(info_.duration*2));
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147 const double delta2 = info_.tweener(current_frame_*2, 0.0, 1.0, static_cast<double>(info_.duration*2));
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149 const double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;
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151 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.
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153 src_frame->get_frame_transform().volume = 1.0-delta2;
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154 auto s_frame1 = spl::make_shared<draw_frame>(src_frame);
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155 auto s_frame2 = spl::make_shared<draw_frame>(src_frame);
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157 dest_frame->get_frame_transform().volume = delta2;
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158 auto d_frame1 = spl::make_shared<draw_frame>(dest_frame);
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159 auto d_frame2 = spl::make_shared<draw_frame>(dest_frame);
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161 if(info_.type == transition_type::mix)
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163 d_frame1->get_frame_transform().opacity = delta1;
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164 d_frame1->get_frame_transform().is_mix = true;
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165 d_frame2->get_frame_transform().opacity = delta2;
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166 d_frame2->get_frame_transform().is_mix = true;
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168 s_frame1->get_frame_transform().opacity = 1.0-delta1;
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169 s_frame1->get_frame_transform().is_mix = true;
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170 s_frame2->get_frame_transform().opacity = 1.0-delta2;
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171 s_frame2->get_frame_transform().is_mix = true;
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173 if(info_.type == transition_type::slide)
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175 d_frame1->get_frame_transform().fill_translation[0] = (-1.0+delta1)*dir;
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176 d_frame2->get_frame_transform().fill_translation[0] = (-1.0+delta2)*dir;
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178 else if(info_.type == transition_type::push)
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180 d_frame1->get_frame_transform().fill_translation[0] = (-1.0+delta1)*dir;
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181 d_frame2->get_frame_transform().fill_translation[0] = (-1.0+delta2)*dir;
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183 s_frame1->get_frame_transform().fill_translation[0] = (0.0+delta1)*dir;
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184 s_frame2->get_frame_transform().fill_translation[0] = (0.0+delta2)*dir;
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186 else if(info_.type == transition_type::wipe)
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188 d_frame1->get_frame_transform().clip_scale[0] = delta1;
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189 d_frame2->get_frame_transform().clip_scale[0] = delta2;
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192 const auto s_frame = s_frame1->get_frame_transform() == s_frame2->get_frame_transform() ? s_frame2 : draw_frame::interlace(s_frame1, s_frame2, mode_);
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193 const auto d_frame = d_frame1->get_frame_transform() == d_frame2->get_frame_transform() ? d_frame2 : draw_frame::interlace(d_frame1, d_frame2, mode_);
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195 last_frame_ = draw_frame::over(s_frame2, d_frame2);
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197 return draw_frame::over(s_frame, d_frame);
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200 virtual void subscribe(const monitor::observable::observer_ptr& o) override
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202 return event_subject_->subscribe(o);
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205 virtual void unsubscribe(const monitor::observable::observer_ptr& o) override
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207 return event_subject_->unsubscribe(o);
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211 spl::shared_ptr<frame_producer> create_transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& destination, const transition_info& info)
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213 return core::wrap_producer(spl::make_shared<transition_producer>(mode, destination, info));
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