]> git.sesse.net Git - casparcg/blobdiff - accelerator/cpu/image/image_mixer.cpp
[ffmpeg] Remove usage of deprecated API usage to easier support a newer version of...
[casparcg] / accelerator / cpu / image / image_mixer.cpp
index 166e8920ed1079fba83d70f8a7f72586a1ec09e0..315d3f9b7b27ab116902e453c6c6e7109624512c 100644 (file)
-/*\r
-* Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
-*\r
-* This file is part of CasparCG (www.casparcg.com).\r
-*\r
-* CasparCG is free software: you can redistribute it and/or modify\r
-* it under the terms of the GNU General Public License as published by\r
-* the Free Software Foundation, either version 3 of the License, or\r
-* (at your option) any later version.\r
-*\r
-* CasparCG is distributed in the hope that it will be useful,\r
-* but WITHOUT ANY WARRANTY; without even the implied warranty of\r
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
-* GNU General Public License for more details.\r
-*\r
-* You should have received a copy of the GNU General Public License\r
-* along with CasparCG. If not, see <http://www.gnu.org/licenses/>.\r
-*\r
-* Author: Robert Nagy, ronag89@gmail.com\r
-*/\r
-\r
-#include "../../stdafx.h"\r
-\r
-#include "image_mixer.h"\r
-\r
-#include "../util/data_frame.h"\r
-#include "../util/xmm.h"\r
-\r
-#include <common/assert.h>\r
-#include <common/gl/gl_check.h>\r
-#include <common/concurrency/async.h>\r
-#include <common/memory/memcpy.h>\r
-\r
-#include <core/frame/data_frame.h>\r
-#include <core/frame/frame_transform.h>\r
-#include <core/frame/pixel_format.h>\r
-#include <core/video_format.h>\r
-\r
-#include <modules/ffmpeg/producer/util/util.h>\r
-\r
-#include <asmlib.h>\r
-\r
-#include <gl/glew.h>\r
-\r
-#include <tbb/cache_aligned_allocator.h>\r
-#include <tbb/parallel_for_each.h>\r
-\r
-#include <boost/assign.hpp>\r
-#include <boost/foreach.hpp>\r
-#include <boost/range.hpp>\r
-#include <boost/range/algorithm_ext/erase.hpp>\r
-#include <boost/thread/future.hpp>\r
-\r
-#include <algorithm>\r
-#include <stdint.h>\r
-#include <vector>\r
-\r
-#if defined(_MSC_VER)\r
-#pragma warning (push)\r
-#pragma warning (disable : 4244)\r
-#endif\r
-extern "C" \r
-{\r
-       #include <libswscale/swscale.h>\r
-       #include <libavcodec/avcodec.h>\r
-       #include <libavformat/avformat.h>\r
-}\r
-#if defined(_MSC_VER)\r
-#pragma warning (pop)\r
-#endif\r
-\r
-namespace caspar { namespace accelerator { namespace cpu {\r
-               \r
-struct item\r
-{\r
-       core::pixel_format_desc                                         pix_desc;\r
-       std::vector<spl::shared_ptr<host_buffer>>       buffers;\r
-       core::image_transform                                           transform;\r
-\r
-       item()\r
-               : pix_desc(core::pixel_format::invalid)\r
-       {\r
-       }\r
-};\r
-\r
-bool operator==(const item& lhs, const item& rhs)\r
-{\r
-       return lhs.buffers == rhs.buffers && lhs.transform == rhs.transform;\r
-}\r
-\r
-bool operator!=(const item& lhs, const item& rhs)\r
-{\r
-       return !(lhs == rhs);\r
-}\r
-       \r
-inline xmm::s8_x blend(xmm::s8_x d, xmm::s8_x s)\r
-{      \r
-       using namespace xmm;\r
-               \r
-       // T(S, D) = S * D[A] + 0x80\r
-       auto aaaa   = s8_x::shuffle(d, s8_x(15, 15, 15, 15, 11, 11, 11, 11, 7, 7, 7, 7, 3, 3, 3, 3));\r
-       d                       = s8_x(u8_x::min(u8_x(d), u8_x(aaaa))); // overflow guard\r
-\r
-       auto xaxa       = s16_x(aaaa) >> 8;             \r
-                             \r
-       auto t1         = s16_x::multiply_low(s16_x(s) & 0x00FF, xaxa) + 0x80;    \r
-       auto t2         = s16_x::multiply_low(s16_x(s) >> 8    , xaxa) + 0x80;\r
-               \r
-       // C(S, D) = S + D - (((T >> 8) + T) >> 8);\r
-       auto xyxy       = s8_x(((t1 >> 8) + t1) >> 8);      \r
-       auto yxyx       = s8_x((t2 >> 8) + t2);    \r
-       auto argb   = s8_x::blend(xyxy, yxyx, s8_x(-1, 0, -1, 0));\r
-\r
-       return s8_x(s) + (d - argb);\r
-}\r
-       \r
-template<typename temporal, typename alignment>\r
-static void kernel(uint8_t* dest, const uint8_t* source, size_t count)\r
-{                      \r
-       using namespace xmm;\r
-\r
-       for(auto n = 0; n < count; n += 32)    \r
-       {\r
-               auto s0 = s8_x::load<temporal_tag, alignment>(dest+n+0);\r
-               auto s1 = s8_x::load<temporal_tag, alignment>(dest+n+16);\r
-\r
-               auto d0 = s8_x::load<temporal_tag, alignment>(source+n+0);\r
-               auto d1 = s8_x::load<temporal_tag, alignment>(source+n+16);\r
-               \r
-               auto argb0 = blend(d0, s0);\r
-               auto argb1 = blend(d1, s1);\r
-\r
-               s8_x::store<temporal, alignment>(argb0, dest+n+0 );\r
-               s8_x::store<temporal, alignment>(argb1, dest+n+16);\r
-       } \r
-}\r
-\r
-template<typename temporal>\r
-static void kernel(uint8_t* dest, const uint8_t* source, size_t count)\r
-{                      \r
-       using namespace xmm;\r
-\r
-       if(reinterpret_cast<int>(dest) % 16 != 0 || reinterpret_cast<int>(source) % 16 != 0)\r
-               kernel<temporal_tag, unaligned_tag>(dest, source, count);\r
-       else\r
-               kernel<temporal_tag, aligned_tag>(dest, source, count);\r
-}\r
-\r
-class image_renderer\r
-{\r
-       std::pair<std::vector<item>, boost::shared_future<boost::iterator_range<const uint8_t*>>>               last_image_;\r
-       tbb::concurrent_unordered_map<int, tbb::concurrent_bounded_queue<std::shared_ptr<SwsContext>>>  sws_contexts_;\r
-public:        \r
-       boost::shared_future<boost::iterator_range<const uint8_t*>> operator()(std::vector<item> items, const core::video_format_desc& format_desc)\r
-       {       \r
-               if(last_image_.first == items && last_image_.second.has_value())\r
-                       return last_image_.second;\r
-\r
-               auto image      = render(items, format_desc);\r
-               last_image_ = std::make_pair(std::move(items), image);\r
-               return image;\r
-       }\r
-\r
-private:\r
-       boost::shared_future<boost::iterator_range<const uint8_t*>> render(std::vector<item> items, const core::video_format_desc& format_desc)\r
-       {\r
-               convert(items, format_desc.width, format_desc.height);          \r
-               \r
-               auto result = spl::make_shared<host_buffer>(format_desc.size, 0);\r
-               if(format_desc.field_mode != core::field_mode::progressive)\r
-               {                       \r
-                       draw(items, result->data(), format_desc.width, format_desc.height, core::field_mode::upper);\r
-                       draw(items, result->data(), format_desc.width, format_desc.height, core::field_mode::lower);\r
-               }\r
-               else\r
-               {\r
-                       draw(items, result->data(), format_desc.width, format_desc.height,  core::field_mode::progressive);\r
-               }\r
-               \r
-               return async(launch_policy::deferred, [=]\r
-               {\r
-                       return boost::iterator_range<const uint8_t*>(result->data(), result->data() + format_desc.size);\r
-               });             \r
-       }\r
-\r
-       void draw(std::vector<item> items, uint8_t* dest, int width, int height, core::field_mode field_mode)\r
-       {               \r
-               BOOST_FOREACH(auto& item, items)\r
-                       item.transform.field_mode &= field_mode;\r
-               \r
-               // Remove empty items.\r
-               boost::range::remove_erase_if(items, [&](const item& item)\r
-               {\r
-                       return item.transform.field_mode == core::field_mode::empty;\r
-               });\r
-               \r
-               // Remove first field stills.\r
-               boost::range::remove_erase_if(items, [&](const item& item)\r
-               {\r
-                       return item.transform.is_still && item.transform.field_mode == field_mode; // only us last field for stills.\r
-               });\r
-\r
-               if(items.empty())\r
-                       return;\r
-               \r
-               auto start = field_mode == core::field_mode::lower ? 1 : 0;\r
-               auto step  = field_mode == core::field_mode::progressive ? 1 : 2;\r
-               \r
-               // TODO: Add support for fill translations.\r
-               // TODO: Add support for mask rect.\r
-               // TODO: Add support for opacity.\r
-               // TODO: Add support for mix transition.\r
-               // TODO: Add support for push transition.\r
-               // TODO: Add support for wipe transition.\r
-               // TODO: Add support for slide transition.\r
-               tbb::parallel_for(tbb::blocked_range<int>(0, height/step), [&](const tbb::blocked_range<int>& r)\r
-               {\r
-                       for(auto i = r.begin(); i != r.end(); ++i)\r
-                       {\r
-                               auto y = i*step+start;\r
-\r
-                               for(std::size_t n = 0; n < items.size()-1; ++n)\r
-                                       kernel<xmm::temporal_tag>(dest + y*width*4, items[n].buffers.at(0)->data() + y*width*4, width*4);\r
-                               \r
-                               std::size_t n = items.size()-1;                         \r
-                               kernel<xmm::nontemporal_tag>(dest + y*width*4, items[n].buffers.at(0)->data() + y*width*4, width*4);\r
-                       }\r
-\r
-                       _mm_mfence();\r
-               });\r
-       }\r
-               \r
-       void convert(std::vector<item>& source_items, int width, int height)\r
-       {\r
-               std::set<std::vector<spl::shared_ptr<host_buffer>>> buffers;\r
-\r
-               BOOST_FOREACH(auto& item, source_items)\r
-                       buffers.insert(item.buffers);\r
-               \r
-               auto dest_items = source_items;\r
-\r
-               tbb::parallel_for_each(buffers.begin(), buffers.end(), [&](const std::vector<spl::shared_ptr<host_buffer>>& buffers)\r
-               {                       \r
-                       auto pix_desc = std::find_if(source_items.begin(), source_items.end(), [&](const item& item){return item.buffers == buffers;})->pix_desc;\r
-\r
-                       if(pix_desc.format == core::pixel_format::bgra && \r
-                               pix_desc.planes.at(0).width == width &&\r
-                               pix_desc.planes.at(0).height == height)\r
-                               return;\r
-\r
-                       auto input_av_frame = ffmpeg::make_av_frame(buffers, pix_desc);\r
-                                                               \r
-                       int key = ((input_av_frame->width << 22) & 0xFFC00000) | ((input_av_frame->height << 6) & 0x003FC000) | ((input_av_frame->format << 7) & 0x00007F00);\r
-                                               \r
-                       auto& pool = sws_contexts_[key];\r
-\r
-                       std::shared_ptr<SwsContext> sws_context;\r
-                       if(!pool.try_pop(sws_context))\r
-                       {\r
-                               double param;\r
-                               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, &param), sws_freeContext);\r
-                       }\r
-                       \r
-                       if(!sws_context)                                \r
-                               BOOST_THROW_EXCEPTION(operation_failed() << msg_info("Could not create software scaling context.") << boost::errinfo_api_function("sws_getContext"));                           \r
-               \r
-                       auto dest_frame = spl::make_shared<host_buffer>(width*height*4);\r
-\r
-                       {\r
-                               spl::shared_ptr<AVFrame> dest_av_frame(avcodec_alloc_frame(), av_free); \r
-                               avcodec_get_frame_defaults(dest_av_frame.get());                        \r
-                               avpicture_fill(reinterpret_cast<AVPicture*>(dest_av_frame.get()), dest_frame->data(), PIX_FMT_BGRA, width, height);\r
-                               \r
-                               sws_scale(sws_context.get(), input_av_frame->data, input_av_frame->linesize, 0, input_av_frame->height, dest_av_frame->data, dest_av_frame->linesize);                          \r
-                               pool.push(sws_context);\r
-                       }\r
-               \r
-                       for(std::size_t n = 0; n < source_items.size(); ++n)\r
-                       {\r
-                               if(source_items[n].buffers == buffers)\r
-                               {\r
-                                       dest_items[n].buffers                   = boost::assign::list_of(dest_frame);\r
-                                       dest_items[n].pix_desc                  = core::pixel_format_desc(core::pixel_format::bgra);\r
-                                       dest_items[n].pix_desc.planes   = boost::assign::list_of(core::pixel_format_desc::plane(width, height, 4));\r
-                                       dest_items[n].transform                 = source_items[n].transform;\r
-                               }\r
-                       }\r
-               });     \r
-\r
-               source_items = std::move(dest_items);\r
-       }\r
-};\r
-               \r
-struct image_mixer::impl : boost::noncopyable\r
-{      \r
-       image_renderer                                          renderer_;\r
-       std::vector<core::image_transform>      transform_stack_;\r
-       std::vector<item>                                       items_; // layer/stream/items\r
-public:\r
-       impl() \r
-               : transform_stack_(1)   \r
-       {\r
-               CASPAR_LOG(info) << L"Initialized Streaming SIMD Extensions Accelerated CPU Image Mixer";\r
-       }\r
-\r
-       void begin_layer(core::blend_mode blend_mode)\r
-       {\r
-       }\r
-               \r
-       void push(const core::frame_transform& transform)\r
-       {\r
-               transform_stack_.push_back(transform_stack_.back()*transform.image_transform);\r
-       }\r
-               \r
-       void visit(const core::data_frame& frame2)\r
-       {                       \r
-               auto frame = dynamic_cast<const cpu::data_frame*>(&frame2);\r
-               if(frame == nullptr)\r
-                       return;\r
-\r
-               if(frame->pixel_format_desc().format == core::pixel_format::invalid)\r
-                       return;\r
-\r
-               if(frame->buffers().empty())\r
-                       return;\r
-\r
-               if(transform_stack_.back().field_mode == core::field_mode::empty)\r
-                       return;\r
-\r
-               item item;\r
-               item.pix_desc                   = frame->pixel_format_desc();\r
-               item.buffers                    = frame->buffers();                             \r
-               item.transform                  = transform_stack_.back();\r
-\r
-               items_.push_back(item);\r
-       }\r
-\r
-       void pop()\r
-       {\r
-               transform_stack_.pop_back();\r
-       }\r
-\r
-       void end_layer()\r
-       {               \r
-       }\r
-       \r
-       boost::shared_future<boost::iterator_range<const uint8_t*>> render(const core::video_format_desc& format_desc)\r
-       {\r
-               return renderer_(std::move(items_), format_desc);\r
-       }\r
-       \r
-       virtual spl::shared_ptr<core::data_frame> create_frame(const void* tag, const core::pixel_format_desc& desc, double frame_rate, core::field_mode field_mode)\r
-       {\r
-               return spl::make_shared<cpu::data_frame>(tag, desc, frame_rate, field_mode);\r
-       }\r
-};\r
-\r
-image_mixer::image_mixer() : impl_(new impl()){}\r
-void image_mixer::push(const core::frame_transform& transform){impl_->push(transform);}\r
-void image_mixer::visit(const core::data_frame& frame){impl_->visit(frame);}\r
-void image_mixer::pop(){impl_->pop();}\r
-boost::shared_future<boost::iterator_range<const uint8_t*>> image_mixer::operator()(const core::video_format_desc& format_desc){return impl_->render(format_desc);}\r
-void image_mixer::begin_layer(core::blend_mode blend_mode){impl_->begin_layer(blend_mode);}\r
-void image_mixer::end_layer(){impl_->end_layer();}\r
-spl::shared_ptr<core::data_frame> image_mixer::create_frame(const void* tag, const core::pixel_format_desc& desc, double frame_rate, core::field_mode field_mode) {return impl_->create_frame(tag, desc, frame_rate, field_mode);}\r
-\r
-}}}
\ No newline at end of file
+/*
+* Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
+*
+* This file is part of CasparCG (www.casparcg.com).
+*
+* CasparCG is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* CasparCG is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
+*
+* Author: Robert Nagy, ronag89@gmail.com
+*/
+
+#include "../../StdAfx.h"
+
+#include "image_mixer.h"
+
+#include "../util/xmm.h"
+
+#include <common/assert.h>
+#include <common/gl/gl_check.h>
+#include <common/future.h>
+#include <common/array.h>
+
+#include <core/frame/frame.h>
+#include <core/frame/frame_transform.h>
+#include <core/frame/pixel_format.h>
+#include <core/video_format.h>
+
+#include <modules/ffmpeg/producer/util/util.h>
+
+#include <asmlib.h>
+
+#include <GL/glew.h>
+
+#include <tbb/parallel_for.h>
+#include <tbb/parallel_for_each.h>
+#include <tbb/concurrent_queue.h>
+
+#include <boost/range/algorithm_ext/erase.hpp>
+#include <boost/thread/future.hpp>
+
+#include <algorithm>
+#include <cstdint>
+#include <vector>
+#include <set>
+#include <array>
+
+#if defined(_MSC_VER)
+#pragma warning (push)
+#pragma warning (disable : 4244)
+#endif
+extern "C"
+{
+       #include <libswscale/swscale.h>
+       #include <libavcodec/avcodec.h>
+       #include <libavformat/avformat.h>
+}
+#if defined(_MSC_VER)
+#pragma warning (pop)
+#endif
+
+namespace caspar { namespace accelerator { namespace cpu {
+
+struct item
+{
+       core::pixel_format_desc                 pix_desc        = core::pixel_format::invalid;
+       std::array<const uint8_t*, 4>   data;
+       core::image_transform                   transform;
+
+       item()
+       {
+               data.fill(0);
+       }
+};
+
+bool operator==(const item& lhs, const item& rhs)
+{
+       return lhs.data == rhs.data && lhs.transform == rhs.transform;
+}
+
+bool operator!=(const item& lhs, const item& rhs)
+{
+       return !(lhs == rhs);
+}
+
+// 100% accurate blending with correct rounding.
+inline xmm::s8_x blend(xmm::s8_x d, xmm::s8_x s)
+{
+       using namespace xmm;
+
+       // C(S, D) = S + D - (((T >> 8) + T) >> 8);
+       // T(S, D) = S * D[A] + 0x80
+
+       auto aaaa   = s8_x::shuffle(d, s8_x(15, 15, 15, 15, 11, 11, 11, 11, 7, 7, 7, 7, 3, 3, 3, 3));
+       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).
+
+       auto xaxa       = s16_x(aaaa) >> 8;
+
+       auto t1         = s16_x::multiply_low(s16_x(s) & 0x00FF, xaxa) + 0x80;
+       auto t2         = s16_x::multiply_low(s16_x(s) >> 8    , xaxa) + 0x80;
+
+       auto xyxy       = s8_x(((t1 >> 8) + t1) >> 8);
+       auto yxyx       = s8_x((t2 >> 8) + t2);
+       auto argb   = s8_x::blend(xyxy, yxyx, s8_x(-1, 0, -1, 0));
+
+       return s8_x(s) + (d - argb);
+}
+
+template<typename temporal, typename alignment>
+static void kernel(uint8_t* dest, const uint8_t* source, size_t count)
+{
+       using namespace xmm;
+
+       for(auto n = 0; n < count; n += 32)
+       {
+               auto s0 = s8_x::load<temporal_tag, alignment>(dest+n+0);
+               auto s1 = s8_x::load<temporal_tag, alignment>(dest+n+16);
+
+               auto d0 = s8_x::load<temporal_tag, alignment>(source+n+0);
+               auto d1 = s8_x::load<temporal_tag, alignment>(source+n+16);
+
+               auto argb0 = blend(d0, s0);
+               auto argb1 = blend(d1, s1);
+
+               s8_x::store<temporal, alignment>(argb0, dest+n+0 );
+               s8_x::store<temporal, alignment>(argb1, dest+n+16);
+       }
+}
+
+template<typename temporal>
+static void kernel(uint8_t* dest, const uint8_t* source, size_t count)
+{
+       using namespace xmm;
+
+       if(reinterpret_cast<std::uint64_t>(dest) % 16 != 0 || reinterpret_cast<std::uint64_t>(source) % 16 != 0)
+               kernel<temporal_tag, unaligned_tag>(dest, source, count);
+       else
+               kernel<temporal_tag, aligned_tag>(dest, source, count);
+}
+
+class image_renderer
+{
+       tbb::concurrent_unordered_map<int64_t, tbb::concurrent_bounded_queue<std::shared_ptr<SwsContext>>>      sws_devices_;
+       tbb::concurrent_bounded_queue<spl::shared_ptr<buffer>>                                                                                          temp_buffers_;
+       core::video_format_desc                                                                                                                                                         format_desc_;
+public:
+       std::future<array<const std::uint8_t>> operator()(std::vector<item> items, const core::video_format_desc& format_desc)
+       {
+               if (format_desc != format_desc_)
+               {
+                       format_desc_ = format_desc;
+                       sws_devices_.clear();
+               }
+
+               convert(items, format_desc.width, format_desc.height);
+
+               // Remove first field stills.
+               boost::range::remove_erase_if(items, [&](const item& item)
+               {
+                       return item.transform.is_still && item.transform.field_mode == format_desc.field_mode; // only us last field for stills.
+               });
+
+               // Stills are progressive
+               for (auto& item : items)
+               {
+                       if(item.transform.is_still)
+                               item.transform.field_mode = core::field_mode::progressive;
+               }
+
+               auto result = spl::make_shared<buffer>(format_desc.size, 0);
+               if(format_desc.field_mode != core::field_mode::progressive)
+               {
+                       draw(items, result->data(), format_desc.width, format_desc.height, core::field_mode::upper);
+                       draw(items, result->data(), format_desc.width, format_desc.height, core::field_mode::lower);
+               }
+               else
+               {
+                       draw(items, result->data(), format_desc.width, format_desc.height,  core::field_mode::progressive);
+               }
+
+               temp_buffers_.clear();
+
+               return make_ready_future(array<const std::uint8_t>(result->data(), format_desc.size, true, result));
+       }
+
+private:
+
+       void draw(std::vector<item> items, uint8_t* dest, std::size_t width, std::size_t height, core::field_mode field_mode)
+       {
+               for (auto& item : items)
+                       item.transform.field_mode &= field_mode;
+
+               // Remove empty items.
+               boost::range::remove_erase_if(items, [&](const item& item)
+               {
+                       return item.transform.field_mode == core::field_mode::empty;
+               });
+
+               if(items.empty())
+                       return;
+
+               auto start = field_mode == core::field_mode::lower ? 1 : 0;
+               auto step  = field_mode == core::field_mode::progressive ? 1 : 2;
+
+               // TODO: Add support for fill translations.
+               // TODO: Add support for mask rect.
+               // TODO: Add support for opacity.
+               // TODO: Add support for mix transition.
+               // TODO: Add support for push transition.
+               // TODO: Add support for wipe transition.
+               // TODO: Add support for slide transition.
+               tbb::parallel_for(tbb::blocked_range<std::size_t>(0, height/step), [&](const tbb::blocked_range<std::size_t>& r)
+               {
+                       for(auto i = r.begin(); i != r.end(); ++i)
+                       {
+                               auto y = i*step+start;
+
+                               for(std::size_t n = 0; n < items.size()-1; ++n)
+                                       kernel<xmm::temporal_tag>(dest + y*width*4, items[n].data.at(0) + y*width*4, width*4);
+
+                               std::size_t n = items.size()-1;
+                               kernel<xmm::nontemporal_tag>(dest + y*width*4, items[n].data.at(0) + y*width*4, width*4);
+                       }
+
+                       _mm_mfence();
+               });
+       }
+
+       void convert(std::vector<item>& source_items, int width, int height)
+       {
+               std::set<std::array<const uint8_t*, 4>> buffers;
+
+               for (auto& item : source_items)
+                       buffers.insert(item.data);
+
+               auto dest_items = source_items;
+
+               tbb::parallel_for_each(buffers.begin(), buffers.end(), [&](const std::array<const uint8_t*, 4>& data)
+               {
+                       auto pix_desc = std::find_if(source_items.begin(), source_items.end(), [&](const item& item){return item.data == data;})->pix_desc;
+
+                       if(pix_desc.format == core::pixel_format::bgra &&
+                               pix_desc.planes.at(0).width == width &&
+                               pix_desc.planes.at(0).height == height)
+                               return;
+
+                       std::array<uint8_t*, 4> data2 = {};
+                       for(std::size_t n = 0; n < data.size(); ++n)
+                               data2.at(n) = const_cast<uint8_t*>(data[n]);
+
+                       auto input_av_frame = ffmpeg::make_av_frame(data2, pix_desc);
+
+
+                       int64_t key = ((static_cast<int64_t>(input_av_frame->width)      << 32) & 0xFFFF00000000) |
+                                                 ((static_cast<int64_t>(input_av_frame->height) << 16) & 0xFFFF0000) |
+                                                 ((static_cast<int64_t>(input_av_frame->format) <<  8) & 0xFF00);
+
+                       auto& pool = sws_devices_[key];
+
+                       std::shared_ptr<SwsContext> sws_device;
+                       if(!pool.try_pop(sws_device))
+                       {
+                               double param;
+                               sws_device.reset(sws_getContext(input_av_frame->width, input_av_frame->height, static_cast<AVPixelFormat>(input_av_frame->format), width, height, AVPixelFormat::AV_PIX_FMT_BGRA, SWS_BILINEAR, nullptr, nullptr, &param), sws_freeContext);
+                       }
+
+                       if(!sws_device)
+                               CASPAR_THROW_EXCEPTION(operation_failed() << msg_info("Could not create software scaling device.") << boost::errinfo_api_function("sws_getContext"));
+
+                       auto dest_frame = spl::make_shared<buffer>(width*height*4);
+                       temp_buffers_.push(dest_frame);
+
+                       {
+                               auto dest_av_frame = ffmpeg::create_frame();
+                               avpicture_fill(reinterpret_cast<AVPicture*>(dest_av_frame.get()), dest_frame->data(), AVPixelFormat::AV_PIX_FMT_BGRA, width, height);
+
+                               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);
+                               pool.push(sws_device);
+                       }
+
+                       for(std::size_t n = 0; n < source_items.size(); ++n)
+                       {
+                               if(source_items[n].data == data)
+                               {
+                                       dest_items[n].data.fill(0);
+                                       dest_items[n].data[0]                   = dest_frame->data();
+                                       dest_items[n].pix_desc                  = core::pixel_format_desc(core::pixel_format::bgra);
+                                       dest_items[n].pix_desc.planes   = { core::pixel_format_desc::plane(width, height, 4) };
+                                       dest_items[n].transform                 = source_items[n].transform;
+                               }
+                       }
+               });
+
+               source_items = std::move(dest_items);
+       }
+};
+
+struct image_mixer::impl : boost::noncopyable
+{
+       image_renderer                                          renderer_;
+       std::vector<core::image_transform>      transform_stack_;
+       std::vector<item>                                       items_; // layer/stream/items
+public:
+       impl(int channel_id)
+               : transform_stack_(1)
+       {
+               CASPAR_LOG(info) << L"Initialized Streaming SIMD Extensions Accelerated CPU Image Mixer for channel " << channel_id;
+       }
+
+       void push(const core::frame_transform& transform)
+       {
+               transform_stack_.push_back(transform_stack_.back()*transform.image_transform);
+       }
+
+       void visit(const core::const_frame& frame)
+       {
+               if(frame.pixel_format_desc().format == core::pixel_format::invalid)
+                       return;
+
+               if(frame.pixel_format_desc().planes.empty())
+                       return;
+
+               if(frame.pixel_format_desc().planes.at(0).size < 16)
+                       return;
+
+               if(transform_stack_.back().field_mode == core::field_mode::empty)
+                       return;
+
+               item item;
+               item.pix_desc   = frame.pixel_format_desc();
+               item.transform  = transform_stack_.back();
+               for(int n = 0; n < item.pix_desc.planes.size(); ++n)
+                       item.data.at(n) = frame.image_data(n).begin();
+
+               items_.push_back(item);
+       }
+
+       void pop()
+       {
+               transform_stack_.pop_back();
+       }
+
+       std::future<array<const std::uint8_t>> render(const core::video_format_desc& format_desc)
+       {
+               return renderer_(std::move(items_), format_desc);
+       }
+
+       core::mutable_frame create_frame(const void* tag, const core::pixel_format_desc& desc, const core::audio_channel_layout& channel_layout)
+       {
+               std::vector<array<std::uint8_t>> buffers;
+               for (auto& plane : desc.planes)
+               {
+                       auto buf = spl::make_shared<buffer>(plane.size);
+                       buffers.push_back(array<std::uint8_t>(buf->data(), plane.size, true, buf));
+               }
+               return core::mutable_frame(std::move(buffers), core::mutable_audio_buffer(), tag, desc, channel_layout);
+       }
+};
+
+image_mixer::image_mixer(int channel_id) : impl_(new impl(channel_id)){}
+image_mixer::~image_mixer(){}
+void image_mixer::push(const core::frame_transform& transform){impl_->push(transform);}
+void image_mixer::visit(const core::const_frame& frame){impl_->visit(frame);}
+void image_mixer::pop(){impl_->pop();}
+int image_mixer::get_max_frame_size() { return std::numeric_limits<int>::max(); }
+std::future<array<const std::uint8_t>> image_mixer::operator()(const core::video_format_desc& format_desc, bool /* straighten_alpha */){return impl_->render(format_desc);}
+core::mutable_frame image_mixer::create_frame(const void* tag, const core::pixel_format_desc& desc, const core::audio_channel_layout& channel_layout) {return impl_->create_frame(tag, desc, channel_layout);}
+
+}}}