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 "../../frame/frame_format.h"
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25 #include "../../frame/gpu_frame.h"
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26 #include "../../frame/gpu_composite_frame.h"
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27 #include "../../frame/frame_factory.h"
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29 #include "../../../common/utility/memory.h"
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30 #include "../../renderer/render_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 frame_producer_ptr& dest, const transition_info& info,
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39 const frame_format_desc& format_desc)
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40 : current_frame_(0), info_(info), format_desc_(format_desc), dest_producer_(dest)
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43 BOOST_THROW_EXCEPTION(null_argument() << arg_name_info("dest"));
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46 frame_producer_ptr get_following_producer() const
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48 return dest_producer_;
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51 void set_leading_producer(const frame_producer_ptr& producer)
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53 source_producer_ = producer;
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56 gpu_frame_ptr get_frame()
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58 if(++current_frame_ >= info_.duration)
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61 gpu_frame_ptr source;
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64 tbb::parallel_invoke
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66 [&]{dest = get_frame(dest_producer_);},
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67 [&]{source = get_frame(source_producer_);}
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70 return compose(dest, source);
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73 gpu_frame_ptr get_frame(frame_producer_ptr& producer)
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75 if(producer == nullptr)
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78 gpu_frame_ptr frame;
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81 frame = producer->get_frame();
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85 CASPAR_LOG_CURRENT_EXCEPTION();
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87 CASPAR_LOG(warning) << "Removed renderer from transition.";
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90 if(frame == nullptr && producer != nullptr && producer->get_following_producer() != nullptr)
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92 auto following = producer->get_following_producer();
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93 following->initialize(factory_);
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94 following->set_leading_producer(producer);
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95 producer = following;
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96 return get_frame(producer);
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101 void set_volume(const gpu_frame_ptr& frame, int volume)
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106 for(size_t n = 0; n < frame->audio_data().size(); ++n)
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107 frame->audio_data()[n] = static_cast<short>((static_cast<int>(frame->audio_data()[n])*volume)>>8);
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111 gpu_frame_ptr compose(const gpu_frame_ptr& dest_frame, gpu_frame_ptr src_frame)
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113 if(info_.type == transition_type::cut)
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119 double alpha = static_cast<double>(current_frame_)/static_cast<double>(info_.duration);
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120 int volume = static_cast<int>(static_cast<double>(current_frame_)/static_cast<double>(info_.duration)*256.0);
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122 tbb::parallel_invoke
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124 [&]{set_volume(dest_frame, volume);},
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125 [&]{set_volume(src_frame, 256-volume);}
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128 auto composite = std::make_shared<gpu_composite_frame>();
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130 composite->add(src_frame);
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132 src_frame = std::make_shared<gpu_frame>(0, 0);
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133 composite->add(dest_frame);
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135 if(info_.type == transition_type::mix)
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136 dest_frame->alpha(alpha);
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137 else if(info_.type == transition_type::slide)
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139 if(info_.direction == transition_direction::from_left)
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140 dest_frame->translate(-1.0+alpha, 0.0);
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141 else if(info_.direction == transition_direction::from_right)
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142 dest_frame->translate(1.0-alpha, 0.0);
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144 else if(info_.type == transition_type::push)
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146 if(info_.direction == transition_direction::from_left)
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148 dest_frame->translate(-1.0+alpha, 0.0);
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149 src_frame->translate(0.0+alpha, 0.0);
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151 else if(info_.direction == transition_direction::from_right)
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153 dest_frame->translate(1.0-alpha, 0.0);
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154 src_frame->translate(0.0-alpha, 0.0);
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157 else if(info_.type == transition_type::wipe)
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159 if(info_.direction == transition_direction::from_left)
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161 dest_frame->translate(-1.0+alpha, 0.0);
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162 dest_frame->texcoords(rectangle(-1.0+alpha, 1.0, alpha, 0.0));
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164 else if(info_.direction == transition_direction::from_right)
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166 dest_frame->translate(1.0-alpha, 0.0);
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167 dest_frame->texcoords(rectangle(1.0-alpha, 1.0, 2.0-alpha, 0.0));
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174 void initialize(const frame_factory_ptr& factory)
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176 dest_producer_->initialize(factory);
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177 factory_ = factory;
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180 const frame_format_desc format_desc_;
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182 frame_producer_ptr source_producer_;
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183 frame_producer_ptr dest_producer_;
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185 unsigned short current_frame_;
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187 const transition_info info_;
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188 frame_factory_ptr factory_;
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191 transition_producer::transition_producer(const frame_producer_ptr& dest, const transition_info& info, const frame_format_desc& format_desc)
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192 : impl_(new implementation(dest, info, format_desc)){}
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193 gpu_frame_ptr transition_producer::get_frame(){return impl_->get_frame();}
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194 frame_producer_ptr transition_producer::get_following_producer() const{return impl_->get_following_producer();}
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195 void transition_producer::set_leading_producer(const frame_producer_ptr& producer) { impl_->set_leading_producer(producer); }
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196 const frame_format_desc& transition_producer::get_frame_format_desc() const { return impl_->format_desc_; }
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197 void transition_producer::initialize(const frame_factory_ptr& factory) { impl_->initialize(factory);}
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