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