2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>
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4 * This file is part of CasparCG.
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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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20 #include "../../stdafx.h"
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22 #include "transition_producer.h"
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24 #include "../../format/video_format.h"
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25 #include "../../processor/draw_frame.h"
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26 #include "../../processor/composite_frame.h"
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27 #include "../../processor/transform_frame.h"
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28 #include "../../processor/frame_processor_device.h"
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30 #include "../../producer/frame_producer_device.h"
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32 #include <boost/range/algorithm/copy.hpp>
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34 namespace caspar { namespace core {
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36 struct transition_producer::implementation : boost::noncopyable
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38 implementation(const safe_ptr<frame_producer>& dest, const transition_info& info) : current_frame_(0), info_(info),
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39 dest_producer_(dest), source_producer_(frame_producer::empty())
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42 safe_ptr<frame_producer> get_following_producer() const
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44 return dest_producer_;
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47 void set_leading_producer(const safe_ptr<frame_producer>& producer)
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49 source_producer_ = producer;
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52 safe_ptr<draw_frame> receive()
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54 if(current_frame_++ >= info_.duration)
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55 return draw_frame::eof();
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57 auto source = draw_frame::empty();
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58 auto dest = draw_frame::empty();
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60 tbb::parallel_invoke
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62 [&]{dest = receive(dest_producer_);},
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63 [&]{source = receive(source_producer_);}
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66 return compose(dest, source);
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69 safe_ptr<draw_frame> receive(safe_ptr<frame_producer>& producer)
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71 if(producer == frame_producer::empty())
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72 return draw_frame::eof();
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74 auto frame = draw_frame::eof();
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77 frame = producer->receive();
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81 CASPAR_LOG_CURRENT_EXCEPTION();
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82 CASPAR_LOG(warning) << "Failed to receive frame. Removed producer from transition.";
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85 if(frame == draw_frame::eof())
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89 auto following = producer->get_following_producer();
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90 following->initialize(safe_ptr<frame_processor_device>(frame_processor_));
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91 following->set_leading_producer(producer);
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92 producer = std::move(following);
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96 CASPAR_LOG_CURRENT_EXCEPTION();
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97 CASPAR_LOG(warning) << "Failed to initialize following producer.";
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100 return receive(producer);
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105 safe_ptr<draw_frame> compose(const safe_ptr<draw_frame>& dest_frame, const safe_ptr<draw_frame>& src_frame)
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107 if(dest_frame == draw_frame::eof() && src_frame == draw_frame::eof())
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108 return draw_frame::eof();
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110 if(info_.type == transition::cut)
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111 return src_frame != draw_frame::eof() ? src_frame : draw_frame::empty();
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113 double alpha = static_cast<double>(current_frame_)/static_cast<double>(info_.duration);
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115 auto my_src_frame = transform_frame(src_frame);
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116 auto my_dest_frame = transform_frame(dest_frame);
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118 my_src_frame.audio_volume(1.0-alpha);
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119 my_dest_frame.audio_volume(alpha);
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121 double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;
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123 if(info_.type == transition::mix)
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124 my_dest_frame.alpha(alpha);
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125 else if(info_.type == transition::slide)
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126 my_dest_frame.translate((-1.0+alpha)*dir, 0.0);
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127 else if(info_.type == transition::push)
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129 my_dest_frame.translate((-1.0+alpha)*dir, 0.0);
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130 my_src_frame.translate((0.0+alpha)*dir, 0.0);
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132 else if(info_.type == transition::wipe)
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134 my_dest_frame.translate((-1.0+alpha)*dir, 0.0);
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135 my_dest_frame.texcoord((-1.0+alpha)*dir, 0.0, 0.0-(1.0-alpha)*dir, 0.0);
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138 return composite_frame(std::move(my_src_frame), std::move(my_dest_frame));
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141 void initialize(const safe_ptr<frame_processor_device>& frame_processor)
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143 dest_producer_->initialize(frame_processor);
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144 frame_processor_ = frame_processor;
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147 std::wstring print() const
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149 return L"transition[" + (source_producer_->print()) + L" -> " + (dest_producer_->print()) + L"]";
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152 safe_ptr<frame_producer> source_producer_;
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153 safe_ptr<frame_producer> dest_producer_;
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155 unsigned short current_frame_;
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157 const transition_info info_;
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158 std::shared_ptr<frame_processor_device> frame_processor_;
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161 transition_producer::transition_producer(transition_producer&& other) : impl_(std::move(other.impl_)){}
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162 transition_producer::transition_producer(const safe_ptr<frame_producer>& dest, const transition_info& info) : impl_(new implementation(dest, info)){}
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163 safe_ptr<draw_frame> transition_producer::receive(){return impl_->receive();}
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164 safe_ptr<frame_producer> transition_producer::get_following_producer() const{return impl_->get_following_producer();}
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165 void transition_producer::set_leading_producer(const safe_ptr<frame_producer>& producer) { impl_->set_leading_producer(producer); }
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166 void transition_producer::initialize(const safe_ptr<frame_processor_device>& frame_processor) { impl_->initialize(frame_processor);}
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167 std::wstring transition_producer::print() const { return impl_->print();}
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