git.sesse.net Git - casparcg/blob - accelerator/ogl/image/image_mixer.cpp

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   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.
  10 *
  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.
  15 *
  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/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21 #include "../../stdafx.h"
  22
  23 #include "image_mixer.h"
  24
  25 #include "image_kernel.h"
  26
  27 #include "../util/device.h"
  28 #include "../util/buffer.h"
  29 #include "../util/texture.h"
  30
  31 #include <common/gl/gl_check.h>
  32 #include <common/future.h>
  33 #include <common/array.h>
  34
  35 #include <core/frame/frame.h>
  36 #include <core/frame/frame_transform.h>
  37 #include <core/frame/pixel_format.h>
  38 #include <core/video_format.h>
  39 #include <core/frame/geometry.h>
  40
  41 #include <asmlib.h>
  42
  43 #include <gl/glew.h>
  44
  45 #include <boost/foreach.hpp>
  46 #include <boost/range/algorithm_ext/erase.hpp>
  47 #include <boost/thread/future.hpp>
  48
  49 #include <algorithm>
  50 #include <vector>
  51
  52 using namespace boost::assign;
  53
  54 namespace caspar { namespace accelerator { namespace ogl {
  55
  56 typedef boost::shared_future<spl::shared_ptr<texture>> future_texture;
  57
  58 struct item
  59 {
  60         core::pixel_format_desc                                                         pix_desc;
  61         std::vector<future_texture>                                                     textures;
  62         core::image_transform                                                           transform;
  63         core::frame_geometry                                                            geometry;
  64
  65         item()
  66                 : pix_desc(core::pixel_format::invalid)
  67         {
  68         }
  69 };
  70
  71 struct layer
  72 {
  73         std::vector<item>       items;
  74         core::blend_mode        blend_mode;
  75
  76         layer()
  77                 : blend_mode(core::blend_mode::normal)
  78         {
  79         }
  80
  81         layer(std::vector<item> items, core::blend_mode blend_mode)
  82                 : items(std::move(items))
  83                 , blend_mode(blend_mode)
  84         {
  85         }
  86 };
  87
  88 class image_renderer
  89 {
  90         spl::shared_ptr<device> ogl_;
  91         image_kernel                    kernel_;
  92 public:
  93         image_renderer(const spl::shared_ptr<device>& ogl)
  94                 : ogl_(ogl)
  95                 , kernel_(ogl_)
  96         {
  97         }
  98
  99         boost::unique_future<array<const std::uint8_t>> operator()(std::vector<layer> layers, const core::video_format_desc& format_desc)
 100         {
 101                 if(layers.empty())
 102                 { // Bypass GPU with empty frame.
 103                         auto buffer = spl::make_shared<const std::vector<uint8_t, tbb::cache_aligned_allocator<uint8_t>>>(format_desc.size, 0);
 104                         return async(launch::deferred, [=]
 105                         {
 106                                 return array<const std::uint8_t>(buffer->data(), format_desc.size, true, buffer);
 107                         });
 108                 }
 109
 110                 if(format_desc.field_mode != core::field_mode::progressive)
 111                 { // Remove jitter from still.
 112                         BOOST_FOREACH(auto& layer, layers)
 113                         {
 114                                 // Remove first field stills.
 115                                 boost::range::remove_erase_if(layer.items, [&](const item& item)
 116                                 {
 117                                         return item.transform.is_still && item.transform.field_mode == format_desc.field_mode; // only us last field for stills.
 118                                 });
 119
 120                                 // Stills are progressive
 121                                 BOOST_FOREACH(auto& item, layer.items)
 122                                 {
 123                                         if(item.transform.is_still)
 124                                                 item.transform.field_mode = core::field_mode::progressive;
 125                                 }
 126                         }
 127                 }
 128
 129                 return flatten(ogl_->begin_invoke([=]() mutable -> boost::shared_future<array<const std::uint8_t>>
 130                 {
 131                         auto target_texture = ogl_->create_texture(format_desc.width, format_desc.height, 4);
 132
 133                         if(format_desc.field_mode != core::field_mode::progressive)
 134                         {
 135                                 draw(target_texture, layers,                    format_desc, core::field_mode::upper);
 136                                 draw(target_texture, std::move(layers), format_desc, core::field_mode::lower);
 137                         }
 138                         else
 139                                 draw(target_texture, std::move(layers), format_desc, core::field_mode::progressive);
 140
 141                         return ogl_->copy_async(target_texture);
 142                 }));
 143         }
 144
 145 private:
 146
 147         void draw(spl::shared_ptr<texture>&                     target_texture,
 148                           std::vector<layer>                            layers,
 149                           const core::video_format_desc&        format_desc,
 150                           core::field_mode                                      field_mode)
 151         {
 152                 std::shared_ptr<texture> layer_key_texture;
 153
 154                 BOOST_FOREACH(auto& layer, layers)
 155                         draw(target_texture, std::move(layer), layer_key_texture, format_desc, field_mode);
 156         }
 157
 158         void draw(spl::shared_ptr<texture>&                     target_texture,
 159                           layer                                                         layer,
 160                           std::shared_ptr<texture>&                     layer_key_texture,
 161                           const core::video_format_desc&        format_desc,
 162                           core::field_mode                                      field_mode)
 163         {
 164                 // REMOVED: This is done in frame_muxer.
 165                 // Fix frames
 166                 //BOOST_FOREACH(auto& item, layer.items)
 167                 //{
 168                         //if(std::abs(item.transform.fill_scale[1]-1.0) > 1.0/target_texture->height() ||
 169                         //   std::abs(item.transform.fill_translation[1]) > 1.0/target_texture->height())
 170                         //      CASPAR_LOG(warning) << L"[image_mixer] Frame should be deinterlaced. Send FILTER DEINTERLACE_BOB when creating producer.";
 171
 172                         //if(item.pix_desc.planes.at(0).height == 480) // NTSC DV
 173                         //{
 174                         //      item.transform.fill_translation[1] += 2.0/static_cast<double>(format_desc.height);
 175                         //      item.transform.fill_scale[1] *= 1.0 - 6.0*1.0/static_cast<double>(format_desc.height);
 176                         //}
 177
 178                         //// Fix field-order if needed
 179                         //if(item.field_mode == core::field_mode::lower && format_desc.field_mode == core::field_mode::upper)
 180                         //      item.transform.fill_translation[1] += 1.0/static_cast<double>(format_desc.height);
 181                         //else if(item.field_mode == core::field_mode::upper && format_desc.field_mode == core::field_mode::lower)
 182                         //      item.transform.fill_translation[1] -= 1.0/static_cast<double>(format_desc.height);
 183                 //}
 184
 185                 // Mask out fields
 186                 BOOST_FOREACH(auto& item, layer.items)
 187                         item.transform.field_mode &= field_mode;
 188
 189                 // Remove empty items.
 190                 boost::range::remove_erase_if(layer.items, [&](const item& item)
 191                 {
 192                         return item.transform.field_mode == core::field_mode::empty;
 193                 });
 194
 195                 if(layer.items.empty())
 196                         return;
 197
 198                 std::shared_ptr<texture> local_key_texture;
 199                 std::shared_ptr<texture> local_mix_texture;
 200
 201                 if(layer.blend_mode != core::blend_mode::normal)
 202                 {
 203                         auto layer_texture = ogl_->create_texture(target_texture->width(), target_texture->height(), 4);
 204
 205                         BOOST_FOREACH(auto& item, layer.items)
 206                                 draw(layer_texture, std::move(item), layer_key_texture, local_key_texture, local_mix_texture);
 207
 208                         draw(layer_texture, std::move(local_mix_texture), core::blend_mode::normal);
 209                         draw(target_texture, std::move(layer_texture), layer.blend_mode);
 210                 }
 211                 else // fast path
 212                 {
 213                         BOOST_FOREACH(auto& item, layer.items)
 214                                 draw(target_texture, std::move(item), layer_key_texture, local_key_texture, local_mix_texture);
 215
 216                         draw(target_texture, std::move(local_mix_texture), core::blend_mode::normal);
 217                 }
 218
 219                 layer_key_texture = std::move(local_key_texture);
 220         }
 221
 222         void draw(spl::shared_ptr<texture>&     target_texture,
 223                           item                                          item,
 224                       std::shared_ptr<texture>& layer_key_texture,
 225                           std::shared_ptr<texture>&     local_key_texture,
 226                           std::shared_ptr<texture>&     local_mix_texture)
 227         {
 228                 draw_params draw_params;
 229                 draw_params.pix_desc    = std::move(item.pix_desc);
 230                 draw_params.transform   = std::move(item.transform);
 231                 draw_params.geometry    = item.geometry;
 232
 233                 BOOST_FOREACH(auto& future_texture, item.textures)
 234                         draw_params.textures.push_back(future_texture.get());
 235
 236                 if(item.transform.is_key)
 237                 {
 238                         local_key_texture = local_key_texture ? local_key_texture : ogl_->create_texture(target_texture->width(), target_texture->height(), 1);
 239
 240                         draw_params.background                  = local_key_texture;
 241                         draw_params.local_key                   = nullptr;
 242                         draw_params.layer_key                   = nullptr;
 243
 244                         kernel_.draw(std::move(draw_params));
 245                 }
 246                 else if(item.transform.is_mix)
 247                 {
 248                         local_mix_texture = local_mix_texture ? local_mix_texture : ogl_->create_texture(target_texture->width(), target_texture->height(), 4);
 249
 250                         draw_params.background                  = local_mix_texture;
 251                         draw_params.local_key                   = std::move(local_key_texture);
 252                         draw_params.layer_key                   = layer_key_texture;
 253
 254                         draw_params.keyer                               = keyer::additive;
 255
 256                         kernel_.draw(std::move(draw_params));
 257                 }
 258                 else
 259                 {
 260                         draw(target_texture, std::move(local_mix_texture), core::blend_mode::normal);
 261
 262                         draw_params.background                  = target_texture;
 263                         draw_params.local_key                   = std::move(local_key_texture);
 264                         draw_params.layer_key                   = layer_key_texture;
 265
 266                         kernel_.draw(std::move(draw_params));
 267                 }
 268         }
 269
 270         void draw(spl::shared_ptr<texture>&      target_texture,
 271                           std::shared_ptr<texture>&& source_buffer,
 272                           core::blend_mode                       blend_mode = core::blend_mode::normal)
 273         {
 274                 if(!source_buffer)
 275                         return;
 276
 277                 draw_params draw_params;
 278                 draw_params.pix_desc.format             = core::pixel_format::bgra;
 279                 draw_params.pix_desc.planes             = list_of(core::pixel_format_desc::plane(source_buffer->width(), source_buffer->height(), 4));
 280                 draw_params.textures                    = list_of(source_buffer);
 281                 draw_params.transform                   = core::image_transform();
 282                 draw_params.blend_mode                  = blend_mode;
 283                 draw_params.background                  = target_texture;
 284                 draw_params.geometry                    = core::frame_geometry::get_default();
 285
 286                 kernel_.draw(std::move(draw_params));
 287         }
 288 };
 289
 290 struct image_mixer::impl : public core::frame_factory
 291 {
 292         spl::shared_ptr<device>                         ogl_;
 293         image_renderer                                          renderer_;
 294         std::vector<core::image_transform>      transform_stack_;
 295         std::vector<layer>                                      layers_; // layer/stream/items
 296 public:
 297         impl(const spl::shared_ptr<device>& ogl)
 298                 : ogl_(ogl)
 299                 , renderer_(ogl)
 300                 , transform_stack_(1)
 301         {
 302                 CASPAR_LOG(info) << L"Initialized OpenGL Accelerated GPU Image Mixer";
 303         }
 304
 305         void begin_layer(core::blend_mode blend_mode)
 306         {
 307                 layers_.push_back(layer(std::vector<item>(), blend_mode));
 308         }
 309
 310         void push(const core::frame_transform& transform)
 311         {
 312                 transform_stack_.push_back(transform_stack_.back()*transform.image_transform);
 313         }
 314
 315         void visit(const core::const_frame& frame)
 316         {
 317                 if(frame.pixel_format_desc().format == core::pixel_format::invalid)
 318                         return;
 319
 320                 if(frame.pixel_format_desc().planes.empty())
 321                         return;
 322
 323                 if(transform_stack_.back().field_mode == core::field_mode::empty)
 324                         return;
 325
 326                 item item;
 327                 item.pix_desc   = frame.pixel_format_desc();
 328                 item.transform  = transform_stack_.back();
 329                 item.geometry   = frame.geometry();
 330
 331                 // NOTE: Once we have copied the arrays they are no longer valid for reading!!! Check for alternative solution e.g. transfer with AMD_pinned_memory.
 332                 for(int n = 0; n < static_cast<int>(item.pix_desc.planes.size()); ++n)
 333                         item.textures.push_back(ogl_->copy_async(frame.image_data(n), item.pix_desc.planes[n].width, item.pix_desc.planes[n].height, item.pix_desc.planes[n].stride));
 334
 335                 layers_.back().items.push_back(item);
 336         }
 337
 338         void pop()
 339         {
 340                 transform_stack_.pop_back();
 341         }
 342
 343         void end_layer()
 344         {
 345         }
 346
 347         boost::unique_future<array<const std::uint8_t>> render(const core::video_format_desc& format_desc)
 348         {
 349                 return renderer_(std::move(layers_), format_desc);
 350         }
 351
 352         core::mutable_frame create_frame(const void* tag, const core::pixel_format_desc& desc) override
 353         {
 354                 std::vector<array<std::uint8_t>> buffers;
 355                 BOOST_FOREACH(auto& plane, desc.planes)
 356                         buffers.push_back(ogl_->create_array(plane.size));
 357
 358                 return core::mutable_frame(std::move(buffers), core::audio_buffer(), tag, desc);
 359         }
 360 };
 361
 362 image_mixer::image_mixer(const spl::shared_ptr<device>& ogl) : impl_(new impl(ogl)){}
 363 image_mixer::~image_mixer(){}
 364 void image_mixer::push(const core::frame_transform& transform){impl_->push(transform);}
 365 void image_mixer::visit(const core::const_frame& frame){impl_->visit(frame);}
 366 void image_mixer::pop(){impl_->pop();}
 367 boost::unique_future<array<const std::uint8_t>> image_mixer::operator()(const core::video_format_desc& format_desc){return impl_->render(format_desc);}
 368 void image_mixer::begin_layer(core::blend_mode blend_mode){impl_->begin_layer(blend_mode);}
 369 void image_mixer::end_layer(){impl_->end_layer();}
 370 core::mutable_frame image_mixer::create_frame(const void* tag, const core::pixel_format_desc& desc) {return impl_->create_frame(tag, desc);}
 371
 372 }}}