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 "image_mixer.h"
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26 #include "../util/write_frame.h"
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27 #include "../util/blend.h"
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29 #include <common/assert.h>
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30 #include <common/gl/gl_check.h>
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31 #include <common/concurrency/async.h>
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32 #include <common/memory/memcpy.h>
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34 #include <core/frame/write_frame.h>
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35 #include <core/frame/frame_transform.h>
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36 #include <core/frame/pixel_format.h>
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37 #include <core/video_format.h>
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39 #include <modules/ffmpeg/producer/util/util.h>
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43 #include <gl/glew.h>
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45 #include <tbb/cache_aligned_allocator.h>
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46 #include <tbb/parallel_for_each.h>
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48 #include <boost/assign.hpp>
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49 #include <boost/foreach.hpp>
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50 #include <boost/range.hpp>
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51 #include <boost/range/algorithm_ext/erase.hpp>
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52 #include <boost/thread/future.hpp>
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54 #include <algorithm>
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57 #if defined(_MSC_VER)
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58 #pragma warning (push)
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59 #pragma warning (disable : 4244)
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63 #include <libswscale/swscale.h>
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64 #include <libavcodec/avcodec.h>
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65 #include <libavformat/avformat.h>
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67 #if defined(_MSC_VER)
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68 #pragma warning (pop)
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71 namespace caspar { namespace accelerator { namespace cpu {
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75 core::pixel_format_desc pix_desc;
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76 std::vector<spl::shared_ptr<host_buffer>> buffers;
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77 core::frame_transform transform;
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80 : pix_desc(core::pixel_format::invalid)
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85 bool operator==(const item& lhs, const item& rhs)
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87 return lhs.buffers == rhs.buffers && lhs.transform == rhs.transform;
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90 bool operator!=(const item& lhs, const item& rhs)
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92 return !(lhs == rhs);
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95 class image_renderer
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97 std::pair<std::vector<item>, boost::shared_future<boost::iterator_range<const uint8_t*>>> last_image_;
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98 tbb::concurrent_unordered_map<int, tbb::concurrent_bounded_queue<std::shared_ptr<SwsContext>>> sws_contexts_;
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100 boost::shared_future<boost::iterator_range<const uint8_t*>> operator()(std::vector<item> items, const core::video_format_desc& format_desc)
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102 if(last_image_.first == items && last_image_.second.has_value())
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103 return last_image_.second;
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105 auto image = render(items, format_desc);
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106 last_image_ = std::make_pair(std::move(items), image);
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111 boost::shared_future<boost::iterator_range<const uint8_t*>> render(std::vector<item> items, const core::video_format_desc& format_desc)
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113 convert(items, format_desc.width, format_desc.height);
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115 auto result = spl::make_shared<host_buffer>(format_desc.size, 0);
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116 if(format_desc.field_mode != core::field_mode::progressive)
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118 auto upper = items;
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119 auto lower = items;
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121 BOOST_FOREACH(auto& item, upper)
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122 item.transform.field_mode &= core::field_mode::upper;
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124 BOOST_FOREACH(auto& item, lower)
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125 item.transform.field_mode &= core::field_mode::lower;
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127 draw(upper, result->data(), format_desc.width, format_desc.height);
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128 draw(lower, result->data(), format_desc.width, format_desc.height);
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132 draw(items, result->data(), format_desc.width, format_desc.height);
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135 return async(launch_policy::deferred, [=]
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137 return boost::iterator_range<const uint8_t*>(result->data(), result->data() + format_desc.size);
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141 void draw(std::vector<item>& items, uint8_t* dest, int width, int height)
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143 BOOST_FOREACH(auto& item, items)
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145 auto field_mode = item.transform.field_mode;
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147 if(field_mode == core::field_mode::empty)
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150 auto start = field_mode == core::field_mode::lower ? 1 : 0;
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151 auto step = field_mode == core::field_mode::progressive ? 1 : 2;
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153 auto source2 = item.buffers.at(0)->data();
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155 tbb::parallel_for(start, height, step, [&](int y)
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157 cpu::blend(dest + y*width*4, dest + y*width*4, source2 + y*width*4, width*4);
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162 void convert(std::vector<item>& items, int width, int height)
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164 tbb::parallel_for_each(items.begin(), items.end(), [&](item& item)
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166 if(item.pix_desc.format == core::pixel_format::bgra &&
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167 item.pix_desc.planes.at(0).width == width &&
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168 item.pix_desc.planes.at(0).height == height)
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171 auto input_av_frame = ffmpeg::make_av_frame(item.buffers, item.pix_desc);
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173 int key = ((input_av_frame->width << 22) & 0xFFC00000) | ((input_av_frame->height << 6) & 0x003FC000) | ((input_av_frame->format << 7) & 0x00007F00);
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175 auto& pool = sws_contexts_[key];
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177 std::shared_ptr<SwsContext> sws_context;
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178 if(!pool.try_pop(sws_context))
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181 sws_context.reset(sws_getContext(input_av_frame->width, input_av_frame->height, static_cast<PixelFormat>(input_av_frame->format), width, height, PIX_FMT_BGRA, SWS_BILINEAR, nullptr, nullptr, ¶m), sws_freeContext);
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185 BOOST_THROW_EXCEPTION(operation_failed() << msg_info("Could not create software scaling context.") << boost::errinfo_api_function("sws_getContext"));
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187 auto dest = spl::make_shared<host_buffer>(width*height*4);
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189 spl::shared_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);
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190 avcodec_get_frame_defaults(av_frame.get());
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191 avpicture_fill(reinterpret_cast<AVPicture*>(av_frame.get()), dest->data(), PIX_FMT_BGRA, width, height);
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193 sws_scale(sws_context.get(), input_av_frame->data, input_av_frame->linesize, 0, input_av_frame->height, av_frame->data, av_frame->linesize);
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195 item.buffers.clear();
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196 item.buffers.push_back(dest);
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197 item.pix_desc = core::pixel_format_desc(core::pixel_format::bgra);
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198 item.pix_desc.planes.clear();
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199 item.pix_desc.planes.push_back(core::pixel_format_desc::plane(width, height, 4));
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201 pool.push(sws_context);
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206 struct image_mixer::impl : boost::noncopyable
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208 image_renderer renderer_;
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209 std::vector<core::frame_transform> transform_stack_;
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210 std::vector<item> items_; // layer/stream/items
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213 : transform_stack_(1)
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215 CASPAR_LOG(info) << L"Initialized CPU Accelerated Image Mixer";
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218 void begin_layer(core::blend_mode blend_mode)
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222 void push(core::frame_transform& transform)
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224 transform_stack_.push_back(transform_stack_.back()*transform);
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227 void visit(core::data_frame& frame2)
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229 write_frame* frame = dynamic_cast<write_frame*>(&frame2);
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230 if(frame == nullptr)
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233 if(frame->get_pixel_format_desc().format == core::pixel_format::invalid)
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236 if(frame->get_buffers().empty())
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239 if(transform_stack_.back().field_mode == core::field_mode::empty)
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243 item.pix_desc = frame->get_pixel_format_desc();
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244 item.buffers = frame->get_buffers();
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245 item.transform = transform_stack_.back();
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246 item.transform.volume = core::frame_transform().volume; // Set volume to default since we don't care about it here.
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248 items_.push_back(item);
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253 transform_stack_.pop_back();
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260 boost::shared_future<boost::iterator_range<const uint8_t*>> render(const core::video_format_desc& format_desc)
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262 return renderer_(std::move(items_), format_desc);
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265 virtual spl::shared_ptr<cpu::write_frame> create_frame(const void* tag, const core::pixel_format_desc& desc)
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267 return spl::make_shared<cpu::write_frame>(tag, desc);
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271 image_mixer::image_mixer() : impl_(new impl()){}
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272 void image_mixer::push(core::frame_transform& transform){impl_->push(transform);}
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273 void image_mixer::visit(core::data_frame& frame){impl_->visit(frame);}
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274 void image_mixer::pop(){impl_->pop();}
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275 boost::shared_future<boost::iterator_range<const uint8_t*>> image_mixer::operator()(const core::video_format_desc& format_desc){return impl_->render(format_desc);}
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276 void image_mixer::begin_layer(core::blend_mode blend_mode){impl_->begin_layer(blend_mode);}
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277 void image_mixer::end_layer(){impl_->end_layer();}
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278 spl::shared_ptr<core::write_frame> image_mixer::create_frame(const void* tag, const core::pixel_format_desc& desc) {return impl_->create_frame(tag, desc);}
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