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 "image_mixer.h"
26 #include "../util/xmm.h"
28 #include <common/assert.h>
29 #include <common/gl/gl_check.h>
30 #include <common/future.h>
31 #include <common/array.h>
33 #include <core/frame/frame.h>
34 #include <core/frame/frame_transform.h>
35 #include <core/frame/pixel_format.h>
36 #include <core/video_format.h>
38 #include <modules/ffmpeg/producer/util/util.h>
44 #include <tbb/parallel_for.h>
45 #include <tbb/parallel_for_each.h>
46 #include <tbb/concurrent_queue.h>
48 #include <boost/range.hpp>
49 #include <boost/range/algorithm_ext/erase.hpp>
50 #include <boost/thread/future.hpp>
58 #pragma warning (push)
59 #pragma warning (disable : 4244)
63 #include <libswscale/swscale.h>
64 #include <libavcodec/avcodec.h>
65 #include <libavformat/avformat.h>
71 namespace caspar { namespace accelerator { namespace cpu {
75 core::pixel_format_desc pix_desc = core::pixel_format::invalid;
76 std::array<const uint8_t*, 4> data;
77 core::image_transform transform;
85 bool operator==(const item& lhs, const item& rhs)
87 return lhs.data == rhs.data && lhs.transform == rhs.transform;
90 bool operator!=(const item& lhs, const item& rhs)
95 // 100% accurate blending with correct rounding.
96 inline xmm::s8_x blend(xmm::s8_x d, xmm::s8_x s)
100 // C(S, D) = S + D - (((T >> 8) + T) >> 8);
101 // T(S, D) = S * D[A] + 0x80
103 auto aaaa = s8_x::shuffle(d, s8_x(15, 15, 15, 15, 11, 11, 11, 11, 7, 7, 7, 7, 3, 3, 3, 3));
104 d = s8_x(u8_x::min(u8_x(d), u8_x(aaaa))); // Overflow guard. Some source files have color values which incorrectly exceed pre-multiplied alpha values, e.g. red(255) > alpha(254).
106 auto xaxa = s16_x(aaaa) >> 8;
108 auto t1 = s16_x::multiply_low(s16_x(s) & 0x00FF, xaxa) + 0x80;
109 auto t2 = s16_x::multiply_low(s16_x(s) >> 8 , xaxa) + 0x80;
111 auto xyxy = s8_x(((t1 >> 8) + t1) >> 8);
112 auto yxyx = s8_x((t2 >> 8) + t2);
113 auto argb = s8_x::blend(xyxy, yxyx, s8_x(-1, 0, -1, 0));
115 return s8_x(s) + (d - argb);
118 template<typename temporal, typename alignment>
119 static void kernel(uint8_t* dest, const uint8_t* source, size_t count)
123 for(auto n = 0; n < count; n += 32)
125 auto s0 = s8_x::load<temporal_tag, alignment>(dest+n+0);
126 auto s1 = s8_x::load<temporal_tag, alignment>(dest+n+16);
128 auto d0 = s8_x::load<temporal_tag, alignment>(source+n+0);
129 auto d1 = s8_x::load<temporal_tag, alignment>(source+n+16);
131 auto argb0 = blend(d0, s0);
132 auto argb1 = blend(d1, s1);
134 s8_x::store<temporal, alignment>(argb0, dest+n+0 );
135 s8_x::store<temporal, alignment>(argb1, dest+n+16);
139 template<typename temporal>
140 static void kernel(uint8_t* dest, const uint8_t* source, size_t count)
144 if(reinterpret_cast<int>(dest) % 16 != 0 || reinterpret_cast<int>(source) % 16 != 0)
145 kernel<temporal_tag, unaligned_tag>(dest, source, count);
147 kernel<temporal_tag, aligned_tag>(dest, source, count);
152 tbb::concurrent_unordered_map<int64_t, tbb::concurrent_bounded_queue<std::shared_ptr<SwsContext>>> sws_devices_;
153 tbb::concurrent_bounded_queue<spl::shared_ptr<buffer>> temp_buffers_;
155 std::future<array<const std::uint8_t>> operator()(std::vector<item> items, const core::video_format_desc& format_desc)
157 convert(items, format_desc.width, format_desc.height);
159 // Remove first field stills.
160 boost::range::remove_erase_if(items, [&](const item& item)
162 return item.transform.is_still && item.transform.field_mode == format_desc.field_mode; // only us last field for stills.
165 // Stills are progressive
166 for (auto& item : items)
168 if(item.transform.is_still)
169 item.transform.field_mode = core::field_mode::progressive;
172 auto result = spl::make_shared<buffer>(format_desc.size, 0);
173 if(format_desc.field_mode != core::field_mode::progressive)
175 draw(items, result->data(), format_desc.width, format_desc.height, core::field_mode::upper);
176 draw(items, result->data(), format_desc.width, format_desc.height, core::field_mode::lower);
180 draw(items, result->data(), format_desc.width, format_desc.height, core::field_mode::progressive);
183 temp_buffers_.clear();
185 return make_ready_future(array<const std::uint8_t>(result->data(), format_desc.size, true, result));
190 void draw(std::vector<item> items, uint8_t* dest, std::size_t width, std::size_t height, core::field_mode field_mode)
192 for (auto& item : items)
193 item.transform.field_mode &= field_mode;
195 // Remove empty items.
196 boost::range::remove_erase_if(items, [&](const item& item)
198 return item.transform.field_mode == core::field_mode::empty;
204 auto start = field_mode == core::field_mode::lower ? 1 : 0;
205 auto step = field_mode == core::field_mode::progressive ? 1 : 2;
207 // TODO: Add support for fill translations.
208 // TODO: Add support for mask rect.
209 // TODO: Add support for opacity.
210 // TODO: Add support for mix transition.
211 // TODO: Add support for push transition.
212 // TODO: Add support for wipe transition.
213 // TODO: Add support for slide transition.
214 tbb::parallel_for(tbb::blocked_range<std::size_t>(0, height/step), [&](const tbb::blocked_range<std::size_t>& r)
216 for(auto i = r.begin(); i != r.end(); ++i)
218 auto y = i*step+start;
220 for(std::size_t n = 0; n < items.size()-1; ++n)
221 kernel<xmm::temporal_tag>(dest + y*width*4, items[n].data.at(0) + y*width*4, width*4);
223 std::size_t n = items.size()-1;
224 kernel<xmm::nontemporal_tag>(dest + y*width*4, items[n].data.at(0) + y*width*4, width*4);
231 void convert(std::vector<item>& source_items, int width, int height)
233 std::set<std::array<const uint8_t*, 4>> buffers;
235 for (auto& item : source_items)
236 buffers.insert(item.data);
238 auto dest_items = source_items;
240 tbb::parallel_for_each(buffers.begin(), buffers.end(), [&](const std::array<const uint8_t*, 4>& data)
242 auto pix_desc = std::find_if(source_items.begin(), source_items.end(), [&](const item& item){return item.data == data;})->pix_desc;
244 if(pix_desc.format == core::pixel_format::bgra &&
245 pix_desc.planes.at(0).width == width &&
246 pix_desc.planes.at(0).height == height)
249 std::array<uint8_t*, 4> data2 = {};
250 for(std::size_t n = 0; n < data.size(); ++n)
251 data2.at(n) = const_cast<uint8_t*>(data[n]);
253 auto input_av_frame = ffmpeg::make_av_frame(data2, pix_desc);
256 int64_t key = ((static_cast<int64_t>(input_av_frame->width) << 32) & 0xFFFF00000000) |
257 ((static_cast<int64_t>(input_av_frame->height) << 16) & 0xFFFF0000) |
258 ((static_cast<int64_t>(input_av_frame->format) << 8) & 0xFF00);
260 auto& pool = sws_devices_[key];
262 std::shared_ptr<SwsContext> sws_device;
263 if(!pool.try_pop(sws_device))
266 sws_device.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);
270 CASPAR_THROW_EXCEPTION(operation_failed() << msg_info("Could not create software scaling device.") << boost::errinfo_api_function("sws_getContext"));
272 auto dest_frame = spl::make_shared<buffer>(width*height*4);
273 temp_buffers_.push(dest_frame);
276 spl::shared_ptr<AVFrame> dest_av_frame(avcodec_alloc_frame(), av_free);
277 avcodec_get_frame_defaults(dest_av_frame.get());
278 avpicture_fill(reinterpret_cast<AVPicture*>(dest_av_frame.get()), dest_frame->data(), PIX_FMT_BGRA, width, height);
280 sws_scale(sws_device.get(), input_av_frame->data, input_av_frame->linesize, 0, input_av_frame->height, dest_av_frame->data, dest_av_frame->linesize);
281 pool.push(sws_device);
284 for(std::size_t n = 0; n < source_items.size(); ++n)
286 if(source_items[n].data == data)
288 dest_items[n].data.assign(0);
289 dest_items[n].data[0] = dest_frame->data();
290 dest_items[n].pix_desc = core::pixel_format_desc(core::pixel_format::bgra);
291 dest_items[n].pix_desc.planes = { core::pixel_format_desc::plane(width, height, 4) };
292 dest_items[n].transform = source_items[n].transform;
297 source_items = std::move(dest_items);
301 struct image_mixer::impl : boost::noncopyable
303 image_renderer renderer_;
304 std::vector<core::image_transform> transform_stack_;
305 std::vector<item> items_; // layer/stream/items
308 : transform_stack_(1)
310 CASPAR_LOG(info) << L"Initialized Streaming SIMD Extensions Accelerated CPU Image Mixer";
313 void begin_layer(core::blend_mode blend_mode)
317 void push(const core::frame_transform& transform)
319 transform_stack_.push_back(transform_stack_.back()*transform.image_transform);
322 void visit(const core::const_frame& frame)
324 if(frame.pixel_format_desc().format == core::pixel_format::invalid)
327 if(frame.pixel_format_desc().planes.empty())
330 if(frame.pixel_format_desc().planes.at(0).size < 16)
333 if(transform_stack_.back().field_mode == core::field_mode::empty)
337 item.pix_desc = frame.pixel_format_desc();
338 item.transform = transform_stack_.back();
339 for(int n = 0; n < item.pix_desc.planes.size(); ++n)
340 item.data.at(n) = frame.image_data(n).begin();
342 items_.push_back(item);
347 transform_stack_.pop_back();
354 std::future<array<const std::uint8_t>> render(const core::video_format_desc& format_desc)
356 return renderer_(std::move(items_), format_desc);
359 virtual core::mutable_frame create_frame(const void* tag, const core::pixel_format_desc& desc)
361 std::vector<array<std::uint8_t>> buffers;
362 for (auto& plane : desc.planes)
364 auto buf = spl::make_shared<buffer>(plane.size);
365 buffers.push_back(array<std::uint8_t>(buf->data(), plane.size, true, buf));
367 return core::mutable_frame(std::move(buffers), core::audio_buffer(), tag, desc);
371 image_mixer::image_mixer() : impl_(new impl()){}
372 image_mixer::~image_mixer(){}
373 void image_mixer::push(const core::frame_transform& transform){impl_->push(transform);}
374 void image_mixer::visit(const core::const_frame& frame){impl_->visit(frame);}
375 void image_mixer::pop(){impl_->pop();}
376 std::future<array<const std::uint8_t>> image_mixer::operator()(const core::video_format_desc& format_desc){return impl_->render(format_desc);}
377 void image_mixer::begin_layer(core::blend_mode blend_mode){impl_->begin_layer(blend_mode);}
378 void image_mixer::end_layer(){impl_->end_layer();}
379 core::mutable_frame image_mixer::create_frame(const void* tag, const core::pixel_format_desc& desc) {return impl_->create_frame(tag, desc);}