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>
35 namespace caspar { namespace core {
37 class transition_producer : public frame_producer_base
39 spl::shared_ptr<monitor::subject> monitor_subject_;
40 const field_mode mode_;
41 int current_frame_ = 0;
43 const transition_info info_;
45 spl::shared_ptr<frame_producer> dest_producer_;
46 spl::shared_ptr<frame_producer> source_producer_ = frame_producer::empty();
51 explicit transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& dest, const transition_info& info)
54 , dest_producer_(dest)
56 dest->monitor_output().attach_parent(monitor_subject_);
58 CASPAR_LOG(info) << print() << L" Initialized";
63 void leading_producer(const spl::shared_ptr<frame_producer>& producer) override
65 source_producer_ = producer;
68 draw_frame receive_impl() override
70 if(current_frame_ >= info_.duration)
72 source_producer_ = core::frame_producer::empty();
73 return dest_producer_->receive();
78 auto dest = draw_frame::empty();
79 auto source = draw_frame::empty();
84 dest = dest_producer_->receive();
85 if(dest == core::draw_frame::late())
86 dest = dest_producer_->last_frame();
90 source = source_producer_->receive();
91 if(source == core::draw_frame::late())
92 source = source_producer_->last_frame();
95 *monitor_subject_ << monitor::message("/transition/frame") % current_frame_ % info_.duration
96 << monitor::message("/transition/type") % [&]() -> std::string
100 case transition_type::mix: return "mix";
101 case transition_type::wipe: return "wipe";
102 case transition_type::slide: return "slide";
103 case transition_type::push: return "push";
104 case transition_type::cut: return "cut";
105 default: return "n/a";
109 return compose(dest, source);
112 draw_frame last_frame() override
114 if(current_frame_ >= info_.duration)
115 return dest_producer_->last_frame();
117 return frame_producer_base::last_frame();
120 constraints& pixel_constraints() override
122 return dest_producer_->pixel_constraints();
125 uint32_t nb_frames() const override
127 return dest_producer_->nb_frames();
130 std::wstring print() const override
132 return L"transition[" + source_producer_->print() + L"=>" + dest_producer_->print() + L"]";
135 std::wstring name() const override
137 return L"transition";
140 boost::property_tree::wptree info() const override
142 return dest_producer_->info();
145 std::future<std::wstring> call(const std::vector<std::wstring>& params) override
147 return dest_producer_->call(params);
150 // transition_producer
152 draw_frame compose(draw_frame dest_frame, draw_frame src_frame) const
154 if(info_.type == transition_type::cut)
157 const double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, static_cast<double>(info_.duration*2));
158 const double delta2 = info_.tweener(current_frame_*2, 0.0, 1.0, static_cast<double>(info_.duration*2));
160 const double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;
162 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.
164 src_frame.transform().audio_transform.volume = 1.0-delta2;
165 auto s_frame1 = src_frame;
166 auto s_frame2 = src_frame;
168 dest_frame.transform().audio_transform.volume = delta2;
169 auto d_frame1 = dest_frame;
170 auto d_frame2 = dest_frame;
172 if(info_.type == transition_type::mix)
174 d_frame1.transform().image_transform.opacity = delta1;
175 d_frame1.transform().image_transform.is_mix = true;
176 d_frame2.transform().image_transform.opacity = delta2;
177 d_frame2.transform().image_transform.is_mix = true;
179 s_frame1.transform().image_transform.opacity = 1.0-delta1;
180 s_frame1.transform().image_transform.is_mix = true;
181 s_frame2.transform().image_transform.opacity = 1.0-delta2;
182 s_frame2.transform().image_transform.is_mix = true;
184 if(info_.type == transition_type::slide)
186 d_frame1.transform().image_transform.fill_translation[0] = (-1.0+delta1)*dir;
187 d_frame2.transform().image_transform.fill_translation[0] = (-1.0+delta2)*dir;
189 else if(info_.type == transition_type::push)
191 d_frame1.transform().image_transform.fill_translation[0] = (-1.0+delta1)*dir;
192 d_frame2.transform().image_transform.fill_translation[0] = (-1.0+delta2)*dir;
194 s_frame1.transform().image_transform.fill_translation[0] = (0.0+delta1)*dir;
195 s_frame2.transform().image_transform.fill_translation[0] = (0.0+delta2)*dir;
197 else if(info_.type == transition_type::wipe)
199 d_frame1.transform().image_transform.clip_scale[0] = delta1;
200 d_frame2.transform().image_transform.clip_scale[0] = delta2;
203 const auto s_frame = s_frame1.transform() == s_frame2.transform() ? s_frame2 : draw_frame::interlace(s_frame1, s_frame2, mode_);
204 const auto d_frame = d_frame1.transform() == d_frame2.transform() ? d_frame2 : draw_frame::interlace(d_frame1, d_frame2, mode_);
206 return draw_frame::over(s_frame, d_frame);
209 monitor::subject& monitor_output()
211 return *monitor_subject_;
214 void on_interaction(const interaction_event::ptr& event) override
216 dest_producer_->on_interaction(event);
219 bool collides(double x, double y) const override
221 return dest_producer_->collides(x, y);
225 spl::shared_ptr<frame_producer> create_transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& destination, const transition_info& info)
227 return spl::make_shared<transition_producer>(mode, destination, info);