git.sesse.net Git - casparcg/blob - modules/ogl/consumer/ogl_consumer.cpp

   1 /*\r
   2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 *  This file is part of CasparCG.\r
   5 *\r
   6 *    CasparCG is free software: you can redistribute it and/or modify\r
   7 *    it under the terms of the GNU General Public License as published by\r
   8 *    the Free Software Foundation, either version 3 of the License, or\r
   9 *    (at your option) any later version.\r
  10 *\r
  11 *    CasparCG is distributed in the hope that it will be useful,\r
  12 *    but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14 *    GNU General Public License for more details.\r
  15 \r
  16 *    You should have received a copy of the GNU General Public License\r
  17 *    along with CasparCG.  If not, see <http://www.gnu.org/licenses/>.\r
  18 *\r
  19 */\r
  20 \r
  21 #define NOMINMAX\r
  22 \r
  23 #include <windows.h>\r
  24 #include <Glee.h>\r
  25 #include <SFML/Window.hpp>\r
  26 \r
  27 #include "ogl_consumer.h"\r
  28 \r
  29 #include <core/video_format.h>\r
  30 #include <core/consumer/frame/read_frame.h>\r
  31 \r
  32 #include <common/gl/gl_check.h>\r
  33 #include <common/concurrency/executor.h>\r
  34 #include <common/memory/safe_ptr.h>\r
  35 #include <common/diagnostics/graph.h>\r
  36 #include <common/utility/timer.h>\r
  37 \r
  38 #include <boost/thread.hpp>\r
  39 \r
  40 #include <algorithm>\r
  41 #include <array>\r
  42 \r
  43 namespace caspar {\r
  44 \r
  45 struct ogl_consumer::implementation : boost::noncopyable\r
  46 {               \r
  47         timer clock_;\r
  48         boost::unique_future<void> active_;\r
  49                 \r
  50         float width_;\r
  51         float height_;\r
  52 \r
  53         GLuint                            texture_;\r
  54         std::array<GLuint, 2> pbos_;\r
  55 \r
  56         const bool windowed_;\r
  57         unsigned int screen_width_;\r
  58         unsigned int screen_height_;\r
  59         const unsigned int screen_index_;\r
  60                                 \r
  61         const stretch stretch_;\r
  62         core::video_format_desc format_desc_;\r
  63         \r
  64         sf::Window window_;\r
  65         \r
  66         safe_ptr<diagnostics::graph> graph_;\r
  67         timer perf_timer_;\r
  68 \r
  69         size_t square_width_;\r
  70         size_t square_height_;\r
  71 \r
  72         executor executor_;\r
  73 public:\r
  74         implementation(unsigned int screen_index, stretch stretch, bool windowed) \r
  75                 : stretch_(stretch)\r
  76                 , windowed_(windowed)\r
  77                 , texture_(0)\r
  78                 , screen_index_(screen_index)\r
  79                 , graph_(diagnostics::create_graph(narrow(print())))\r
  80                 , executor_(print())\r
  81         {               \r
  82                 graph_->add_guide("frame-time", 0.5);\r
  83                 graph_->set_color("frame-time", diagnostics::color(1.0f, 0.0f, 0.0f));\r
  84         }\r
  85 \r
  86         ~implementation()\r
  87         {\r
  88                 CASPAR_LOG(info) << print() << L" Shutting down.";      \r
  89         }\r
  90 \r
  91         void initialize(const core::video_format_desc& format_desc)\r
  92         {\r
  93                 if(!GLEE_VERSION_2_1)\r
  94                         BOOST_THROW_EXCEPTION(not_supported() << msg_info("Missing OpenGL 2.1 support."));\r
  95                 \r
  96                 format_desc_ = format_desc;\r
  97 \r
  98                 square_width_ = format_desc_.width;\r
  99                 square_height_ = format_desc_.height;\r
 100                                                 \r
 101                 if(format_desc_.format == core::video_format::pal)\r
 102                 {\r
 103                         square_width_ = 768;\r
 104                         square_height_ = 576;\r
 105                 }\r
 106                 else if(format_desc_.format == core::video_format::ntsc)\r
 107                 {\r
 108                         square_width_ = 720;\r
 109                         square_height_ = 547;\r
 110                 }\r
 111 \r
 112                 screen_width_ = format_desc.width;\r
 113                 screen_height_ = format_desc.height;\r
 114 #ifdef _WIN32\r
 115                 DISPLAY_DEVICE d_device;                        \r
 116                 memset(&d_device, 0, sizeof(d_device));\r
 117                 d_device.cb = sizeof(d_device);\r
 118 \r
 119                 std::vector<DISPLAY_DEVICE> displayDevices;\r
 120                 for(int n = 0; EnumDisplayDevices(NULL, n, &d_device, NULL); ++n)\r
 121                 {\r
 122                         displayDevices.push_back(d_device);\r
 123                         memset(&d_device, 0, sizeof(d_device));\r
 124                         d_device.cb = sizeof(d_device);\r
 125                 }\r
 126 \r
 127                 if(screen_index_ >= displayDevices.size())\r
 128                         BOOST_THROW_EXCEPTION(out_of_range() << arg_name_info("screen_index_") << msg_info(narrow(print())));\r
 129                 \r
 130                 DEVMODE devmode;\r
 131                 memset(&devmode, 0, sizeof(devmode));\r
 132                 \r
 133                 if(!EnumDisplaySettings(displayDevices[screen_index_].DeviceName, ENUM_CURRENT_SETTINGS, &devmode))\r
 134                         BOOST_THROW_EXCEPTION(invalid_operation() << arg_name_info("screen_index") << msg_info(narrow(print()) + " EnumDisplaySettings"));\r
 135                 \r
 136                 screen_width_ = windowed_ ? square_width_ : devmode.dmPelsWidth;\r
 137                 screen_height_ = windowed_ ? square_height_ : devmode.dmPelsHeight;\r
 138 #else\r
 139                 if(!windowed)\r
 140                         BOOST_THROW_EXCEPTION(not_supported() << msg_info(narrow(print() + " doesn't support non-Win32 fullscreen"));\r
 141 \r
 142                 if(screen_index != 0)\r
 143                         CASPAR_LOG(warning) << print() << " only supports screen_index=0 for non-Win32";\r
 144 #endif          \r
 145                 executor_.start();\r
 146                 executor_.invoke([=]\r
 147                 {\r
 148                         window_.Create(sf::VideoMode(screen_width_, screen_height_, 32), narrow(print()), windowed_ ? sf::Style::Resize : sf::Style::Fullscreen);\r
 149                         window_.ShowMouseCursor(false);\r
 150                         window_.SetPosition(devmode.dmPosition.x, devmode.dmPosition.y);\r
 151                         window_.SetSize(screen_width_, screen_height_);\r
 152                         window_.SetActive();\r
 153                         GL(glEnable(GL_TEXTURE_2D));\r
 154                         GL(glDisable(GL_DEPTH_TEST));           \r
 155                         GL(glClearColor(0.0, 0.0, 0.0, 0.0));\r
 156                         GL(glViewport(0, 0, format_desc_.width, format_desc_.height));\r
 157                         glLoadIdentity();\r
 158                                 \r
 159                         calculate_aspect();\r
 160                         \r
 161                         glGenTextures(1, &texture_);\r
 162                         glBindTexture(GL_TEXTURE_2D, texture_);\r
 163                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);\r
 164                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);\r
 165                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);\r
 166                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);\r
 167                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, format_desc_.width, format_desc_.height, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0);\r
 168                         glBindTexture(GL_TEXTURE_2D, 0);\r
 169                         \r
 170                         GL(glGenBuffers(2, pbos_.data()));\r
 171                         \r
 172                         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[0]);\r
 173                         glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 174                         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[1]);\r
 175                         glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 176                         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);\r
 177                 });\r
 178                 active_ = executor_.begin_invoke([]{});\r
 179                 CASPAR_LOG(info) << print() << " Sucessfully initialized.";\r
 180         }\r
 181 \r
 182         void calculate_aspect()\r
 183         {\r
 184                 if(windowed_)\r
 185                 {\r
 186                         screen_height_ = window_.GetHeight();\r
 187                         screen_width_ = window_.GetWidth();\r
 188                 }\r
 189                 \r
 190                 GL(glViewport(0, 0, screen_width_, screen_height_));\r
 191 \r
 192                 std::pair<float, float> target_ratio = None();\r
 193                 if(stretch_ == fill)\r
 194                         target_ratio = Fill();\r
 195                 else if(stretch_ == uniform)\r
 196                         target_ratio = Uniform();\r
 197                 else if(stretch_ == uniform_to_fill)\r
 198                         target_ratio = UniformToFill();\r
 199 \r
 200                 width_ = target_ratio.first;\r
 201                 height_ = target_ratio.second;\r
 202         }\r
 203                 \r
 204         std::pair<float, float> None()\r
 205         {\r
 206                 float width = static_cast<float>(square_width_)/static_cast<float>(screen_width_);\r
 207                 float height = static_cast<float>(square_height_)/static_cast<float>(screen_height_);\r
 208 \r
 209                 return std::make_pair(width, height);\r
 210         }\r
 211 \r
 212         std::pair<float, float> Uniform()\r
 213         {\r
 214                 float aspect = static_cast<float>(square_width_)/static_cast<float>(square_height_);\r
 215                 float width = std::min(1.0f, static_cast<float>(screen_height_)*aspect/static_cast<float>(screen_width_));\r
 216                 float height = static_cast<float>(screen_width_*width)/static_cast<float>(screen_height_*aspect);\r
 217 \r
 218                 return std::make_pair(width, height);\r
 219         }\r
 220 \r
 221         std::pair<float, float> Fill()\r
 222         {\r
 223                 return std::make_pair(1.0f, 1.0f);\r
 224         }\r
 225 \r
 226         std::pair<float, float> UniformToFill()\r
 227         {\r
 228                 float wr = static_cast<float>(square_width_)/static_cast<float>(screen_width_);\r
 229                 float hr = static_cast<float>(square_height_)/static_cast<float>(screen_height_);\r
 230                 float r_inv = 1.0f/std::min(wr, hr);\r
 231 \r
 232                 float width = wr*r_inv;\r
 233                 float height = hr*r_inv;\r
 234 \r
 235                 return std::make_pair(width, height);\r
 236         }\r
 237 \r
 238         void render(const safe_ptr<const core::read_frame>& frame)\r
 239         {                       \r
 240                 glBindTexture(GL_TEXTURE_2D, texture_);\r
 241                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[0]);\r
 242 \r
 243                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, format_desc_.width, format_desc_.height, GL_BGRA, GL_UNSIGNED_BYTE, 0);\r
 244 \r
 245                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[1]);\r
 246 \r
 247                 glBufferData(GL_PIXEL_UNPACK_BUFFER, format_desc_.size, 0, GL_STREAM_DRAW);\r
 248 \r
 249                 auto ptr = glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);\r
 250                 if(ptr)\r
 251                 {\r
 252                         std::copy(frame->image_data().begin(), frame->image_data().end(), reinterpret_cast<char*>(ptr));\r
 253                         glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER); // release the mapped buffer\r
 254                 }\r
 255 \r
 256                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);\r
 257                                 \r
 258                 GL(glClear(GL_COLOR_BUFFER_BIT));                       \r
 259                 glBegin(GL_QUADS);\r
 260                                 glTexCoord2f(0.0f,        1.0f);        glVertex2f(-width_, -height_);\r
 261                                 glTexCoord2f(1.0f,        1.0f);        glVertex2f( width_, -height_);\r
 262                                 glTexCoord2f(1.0f,        0.0f);        glVertex2f( width_,  height_);\r
 263                                 glTexCoord2f(0.0f,        0.0f);        glVertex2f(-width_,  height_);\r
 264                 glEnd();\r
 265                 \r
 266                 glBindTexture(GL_TEXTURE_2D, 0);\r
 267 \r
 268                 std::rotate(pbos_.begin(), pbos_.begin() + 1, pbos_.end());\r
 269         }\r
 270                 \r
 271         void send(const safe_ptr<const core::read_frame>& frame)\r
 272         {\r
 273                 active_.get();\r
 274                 active_ = executor_.begin_invoke([=]\r
 275                 {\r
 276                         perf_timer_.reset();\r
 277                         sf::Event e;\r
 278                         while(window_.GetEvent(e))\r
 279                         {\r
 280                                 if(e.Type == sf::Event::Resized)\r
 281                                          calculate_aspect();\r
 282                         }\r
 283                         render(frame);\r
 284                         window_.Display();\r
 285                         graph_->update_value("frame-time", static_cast<float>(perf_timer_.elapsed()/format_desc_.interval*0.5));\r
 286                 });\r
 287         }\r
 288 \r
 289         std::wstring print() const\r
 290         {\r
 291                 return L"ogl[" + boost::lexical_cast<std::wstring>(screen_index_) + L"]";\r
 292         }\r
 293 \r
 294         size_t buffer_depth() const{return 2;}\r
 295 };\r
 296 \r
 297 ogl_consumer::ogl_consumer(ogl_consumer&& other) : impl_(std::move(other.impl_)){}\r
 298 ogl_consumer::ogl_consumer(unsigned int screen_index, stretch stretch, bool windowed) : impl_(new implementation(screen_index, stretch, windowed)){}\r
 299 void ogl_consumer::send(const safe_ptr<const core::read_frame>& frame){impl_->send(frame);}\r
 300 size_t ogl_consumer::buffer_depth() const{return impl_->buffer_depth();}\r
 301 void ogl_consumer::initialize(const core::video_format_desc& format_desc)\r
 302 {\r
 303         impl_.reset(new implementation(impl_->screen_index_, impl_->stretch_, impl_->windowed_));\r
 304         impl_->initialize(format_desc);\r
 305 }\r
 306 std::wstring ogl_consumer::print() const {return impl_->print();}\r
 307 \r
 308 safe_ptr<core::frame_consumer> create_ogl_consumer(const std::vector<std::wstring>& params)\r
 309 {\r
 310         if(params.size() < 1 || params[0] != L"OGL")\r
 311                 return core::frame_consumer::empty();\r
 312         \r
 313         unsigned int screen_index = 0;\r
 314         stretch stretch = stretch::fill;\r
 315         bool windowed = true;\r
 316         \r
 317         if(params.size() > 1) \r
 318                 screen_index = lexical_cast_or_default<int>(params[2], screen_index);\r
 319 \r
 320         if(params.size() > 2) \r
 321                 windowed = lexical_cast_or_default<bool>(params[3], windowed);\r
 322 \r
 323         return make_safe<ogl_consumer>(screen_index, stretch, windowed);\r
 324 }\r
 325 \r
 326 }