2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
4 * This file is part of CasparCG (www.casparcg.com).
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.
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.
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/>.
19 * Author: Robert Nagy, ronag89@gmail.com
22 #include "../../stdafx.h"
24 #include "transition_producer.h"
26 #include "../frame_producer.h"
27 #include "../../frame/draw_frame.h"
28 #include "../../frame/frame_transform.h"
29 #include "../../monitor/monitor.h"
31 #include <tbb/parallel_invoke.h>
33 namespace caspar { namespace core {
35 class transition_producer : public frame_producer_base
37 monitor::subject monitor_subject_;
38 const field_mode mode_;
41 const transition_info info_;
43 spl::shared_ptr<frame_producer> dest_producer_;
44 spl::shared_ptr<frame_producer> source_producer_;
49 explicit transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& dest, const transition_info& info)
53 , dest_producer_(dest)
54 , source_producer_(frame_producer::empty())
57 dest->monitor_output().link_target(&monitor_subject_);
59 CASPAR_LOG(info) << print() << L" Initialized";
64 void leading_producer(const spl::shared_ptr<frame_producer>& producer) override
66 source_producer_ = producer;
69 draw_frame receive_impl() override
71 if(current_frame_ >= info_.duration)
73 source_producer_ = core::frame_producer::empty();
74 return dest_producer_->receive();
79 auto dest = draw_frame::empty();
80 auto source = draw_frame::empty();
85 dest = dest_producer_->receive();
86 if(dest == core::draw_frame::late())
87 dest = dest_producer_->last_frame();
91 source = source_producer_->receive();
92 if(source == core::draw_frame::late())
93 source = source_producer_->last_frame();
96 monitor_subject_ << monitor::message("/transition/frame") % current_frame_ % info_.duration
97 << monitor::message("/transition/type") % [&]() -> std::string
99 switch(info_.type.value())
101 case transition_type::mix: return "mix";
102 case transition_type::wipe: return "wipe";
103 case transition_type::slide: return "slide";
104 case transition_type::push: return "push";
105 case transition_type::cut: return "cut";
106 default: return "n/a";
110 return compose(dest, source);
113 draw_frame last_frame() override
115 if(current_frame_ >= info_.duration)
116 return dest_producer_->last_frame();
118 return frame_producer_base::last_frame();
121 constraints& pixel_constraints() override
123 return dest_producer_->pixel_constraints();
126 uint32_t nb_frames() const override
128 return dest_producer_->nb_frames();
131 std::wstring print() const override
133 return L"transition[" + source_producer_->print() + L"=>" + dest_producer_->print() + L"]";
136 std::wstring name() const override
138 return L"transition";
141 boost::property_tree::wptree info() const override
143 return dest_producer_->info();
146 boost::unique_future<std::wstring> call(const std::vector<std::wstring>& params) override
148 return dest_producer_->call(params);
151 // transition_producer
153 draw_frame compose(draw_frame dest_frame, draw_frame src_frame) const
155 if(info_.type == transition_type::cut)
158 const double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, static_cast<double>(info_.duration*2));
159 const double delta2 = info_.tweener(current_frame_*2, 0.0, 1.0, static_cast<double>(info_.duration*2));
161 const double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;
163 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.
165 src_frame.transform().audio_transform.volume = 1.0-delta2;
166 auto s_frame1 = src_frame;
167 auto s_frame2 = src_frame;
169 dest_frame.transform().audio_transform.volume = delta2;
170 auto d_frame1 = dest_frame;
171 auto d_frame2 = dest_frame;
173 if(info_.type == transition_type::mix)
175 d_frame1.transform().image_transform.opacity = delta1;
176 d_frame1.transform().image_transform.is_mix = true;
177 d_frame2.transform().image_transform.opacity = delta2;
178 d_frame2.transform().image_transform.is_mix = true;
180 s_frame1.transform().image_transform.opacity = 1.0-delta1;
181 s_frame1.transform().image_transform.is_mix = true;
182 s_frame2.transform().image_transform.opacity = 1.0-delta2;
183 s_frame2.transform().image_transform.is_mix = true;
185 if(info_.type == transition_type::slide)
187 d_frame1.transform().image_transform.fill_translation[0] = (-1.0+delta1)*dir;
188 d_frame2.transform().image_transform.fill_translation[0] = (-1.0+delta2)*dir;
190 else if(info_.type == transition_type::push)
192 d_frame1.transform().image_transform.fill_translation[0] = (-1.0+delta1)*dir;
193 d_frame2.transform().image_transform.fill_translation[0] = (-1.0+delta2)*dir;
195 s_frame1.transform().image_transform.fill_translation[0] = (0.0+delta1)*dir;
196 s_frame2.transform().image_transform.fill_translation[0] = (0.0+delta2)*dir;
198 else if(info_.type == transition_type::wipe)
200 d_frame1.transform().image_transform.clip_scale[0] = delta1;
201 d_frame2.transform().image_transform.clip_scale[0] = delta2;
204 const auto s_frame = s_frame1.transform() == s_frame2.transform() ? s_frame2 : draw_frame::interlace(s_frame1, s_frame2, mode_);
205 const auto d_frame = d_frame1.transform() == d_frame2.transform() ? d_frame2 : draw_frame::interlace(d_frame1, d_frame2, mode_);
207 return draw_frame::over(s_frame, d_frame);
210 monitor::source& monitor_output()
212 return monitor_subject_;
215 void on_interaction(const interaction_event::ptr& event) override
217 dest_producer_->on_interaction(event);
220 bool collides(double x, double y) const override
222 return dest_producer_->collides(x, y);
226 spl::shared_ptr<frame_producer> create_transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& destination, const transition_info& info)
228 return spl::make_shared<transition_producer>(mode, destination, info);