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         printer parent_printer_;\r
  49         boost::unique_future<void> active_;\r
  50                 \r
  51         float width_;\r
  52         float height_;\r
  53 \r
  54         GLuint                            texture_;\r
  55         std::array<GLuint, 2> pbos_;\r
  56 \r
  57         const bool windowed_;\r
  58         unsigned int screen_width_;\r
  59         unsigned int screen_height_;\r
  60         const unsigned int screen_index_;\r
  61                                 \r
  62         const stretch stretch_;\r
  63         core::video_format_desc format_desc_;\r
  64         \r
  65         sf::Window window_;\r
  66         \r
  67         safe_ptr<diagnostics::graph> graph_;\r
  68         timer perf_timer_;\r
  69 \r
  70         executor executor_;\r
  71 public:\r
  72         implementation(unsigned int screen_index, stretch stretch, bool windowed) \r
  73                 : stretch_(stretch)\r
  74                 , windowed_(windowed)\r
  75                 , texture_(0)\r
  76                 , screen_index_(screen_index)\r
  77                 , graph_(diagnostics::create_graph(narrow(print())))\r
  78                 , executor_(print())\r
  79         {               \r
  80                 graph_->add_guide("frame-time", 0.5);\r
  81                 graph_->set_color("frame-time", diagnostics::color(1.0f, 0.0f, 0.0f));\r
  82         }\r
  83 \r
  84         ~implementation()\r
  85         {\r
  86                 CASPAR_LOG(info) << print() << L" Shutting down.";      \r
  87         }\r
  88 \r
  89         void initialize(const core::video_format_desc& format_desc, const printer& parent_printer)\r
  90         {\r
  91                 if(!GLEE_VERSION_2_1)\r
  92                         BOOST_THROW_EXCEPTION(not_supported() << msg_info("Missing OpenGL 2.1 support."));\r
  93                 \r
  94                 format_desc_ = format_desc;\r
  95                 parent_printer_ = parent_printer;\r
  96 \r
  97                 screen_width_ = format_desc.width;\r
  98                 screen_height_ = format_desc.height;\r
  99 #ifdef _WIN32\r
 100                 DISPLAY_DEVICE d_device;                        \r
 101                 memset(&d_device, 0, sizeof(d_device));\r
 102                 d_device.cb = sizeof(d_device);\r
 103 \r
 104                 std::vector<DISPLAY_DEVICE> displayDevices;\r
 105                 for(int n = 0; EnumDisplayDevices(NULL, n, &d_device, NULL); ++n)\r
 106                 {\r
 107                         displayDevices.push_back(d_device);\r
 108                         memset(&d_device, 0, sizeof(d_device));\r
 109                         d_device.cb = sizeof(d_device);\r
 110                 }\r
 111 \r
 112                 if(screen_index_ >= displayDevices.size())\r
 113                         BOOST_THROW_EXCEPTION(out_of_range() << arg_name_info("screen_index_") << msg_info(narrow(print())));\r
 114                 \r
 115                 DEVMODE devmode;\r
 116                 memset(&devmode, 0, sizeof(devmode));\r
 117                 \r
 118                 if(!EnumDisplaySettings(displayDevices[screen_index_].DeviceName, ENUM_CURRENT_SETTINGS, &devmode))\r
 119                         BOOST_THROW_EXCEPTION(invalid_operation() << arg_name_info("screen_index") << msg_info(narrow(print()) + " EnumDisplaySettings"));\r
 120                 \r
 121                 screen_width_ = windowed_ ? format_desc_.width : devmode.dmPelsWidth;\r
 122                 screen_height_ = windowed_ ? format_desc_.height : devmode.dmPelsHeight;\r
 123 #else\r
 124                 if(!windowed)\r
 125                         BOOST_THROW_EXCEPTION(not_supported() << msg_info(narrow(print() + " doesn't support non-Win32 fullscreen"));\r
 126 \r
 127                 if(screen_index != 0)\r
 128                         CASPAR_LOG(warning) << print() << " only supports screen_index=0 for non-Win32";\r
 129 #endif          \r
 130                 executor_.start();\r
 131                 executor_.invoke([=]\r
 132                 {\r
 133                         window_.Create(sf::VideoMode(screen_width_, screen_height_, 32), narrow(print()), windowed_ ? sf::Style::Resize : sf::Style::Fullscreen);\r
 134                         window_.ShowMouseCursor(false);\r
 135                         window_.SetPosition(devmode.dmPosition.x, devmode.dmPosition.y);\r
 136                         window_.SetSize(screen_width_, screen_height_);\r
 137                         window_.SetActive();\r
 138                         GL(glEnable(GL_TEXTURE_2D));\r
 139                         GL(glDisable(GL_DEPTH_TEST));           \r
 140                         GL(glClearColor(0.0, 0.0, 0.0, 0.0));\r
 141                         GL(glViewport(0, 0, format_desc_.width, format_desc_.height));\r
 142                         glLoadIdentity();\r
 143                                 \r
 144                         calculate_aspect();\r
 145                         \r
 146                         glGenTextures(1, &texture_);\r
 147                         glBindTexture(GL_TEXTURE_2D, texture_);\r
 148                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);\r
 149                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);\r
 150                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);\r
 151                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);\r
 152                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, format_desc_.width, format_desc_.height, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0);\r
 153                         glBindTexture(GL_TEXTURE_2D, 0);\r
 154                         \r
 155                         GL(glGenBuffers(2, pbos_.data()));\r
 156                         \r
 157                         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[0]);\r
 158                         glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 159                         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[1]);\r
 160                         glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 161                         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);\r
 162                 });\r
 163                 active_ = executor_.begin_invoke([]{});\r
 164                 CASPAR_LOG(info) << print() << " Sucessfully initialized.";\r
 165         }\r
 166 \r
 167         void calculate_aspect()\r
 168         {\r
 169                 if(windowed_)\r
 170                 {\r
 171                         screen_height_ = window_.GetHeight();\r
 172                         screen_width_ = window_.GetWidth();\r
 173                 }\r
 174                 \r
 175                 GL(glViewport(0, 0, screen_width_, screen_height_));\r
 176 \r
 177                 std::pair<float, float> target_ratio = None();\r
 178                 if(stretch_ == fill)\r
 179                         target_ratio = Fill();\r
 180                 else if(stretch_ == uniform)\r
 181                         target_ratio = Uniform();\r
 182                 else if(stretch_ == uniform_to_fill)\r
 183                         target_ratio = UniformToFill();\r
 184 \r
 185                 width_ = target_ratio.first;\r
 186                 height_ = target_ratio.second;\r
 187         }\r
 188                 \r
 189         std::pair<float, float> None()\r
 190         {\r
 191                 float width = static_cast<float>(format_desc_.width)/static_cast<float>(screen_width_);\r
 192                 float height = static_cast<float>(format_desc_.height)/static_cast<float>(screen_height_);\r
 193 \r
 194                 return std::make_pair(width, height);\r
 195         }\r
 196 \r
 197         std::pair<float, float> Uniform()\r
 198         {\r
 199                 float aspect = static_cast<float>(format_desc_.width)/static_cast<float>(format_desc_.height);\r
 200                 float width = std::min(1.0f, static_cast<float>(screen_height_)*aspect/static_cast<float>(screen_width_));\r
 201                 float height = static_cast<float>(screen_width_*width)/static_cast<float>(screen_height_*aspect);\r
 202 \r
 203                 return std::make_pair(width, height);\r
 204         }\r
 205 \r
 206         std::pair<float, float> Fill()\r
 207         {\r
 208                 return std::make_pair(1.0f, 1.0f);\r
 209         }\r
 210 \r
 211         std::pair<float, float> UniformToFill()\r
 212         {\r
 213                 float wr = static_cast<float>(format_desc_.width)/static_cast<float>(screen_width_);\r
 214                 float hr = static_cast<float>(format_desc_.height)/static_cast<float>(screen_height_);\r
 215                 float r_inv = 1.0f/std::min(wr, hr);\r
 216 \r
 217                 float width = wr*r_inv;\r
 218                 float height = hr*r_inv;\r
 219 \r
 220                 return std::make_pair(width, height);\r
 221         }\r
 222 \r
 223         void render(const safe_ptr<const core::read_frame>& frame)\r
 224         {                       \r
 225                 glBindTexture(GL_TEXTURE_2D, texture_);\r
 226                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[0]);\r
 227 \r
 228                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, format_desc_.width, format_desc_.height, GL_BGRA, GL_UNSIGNED_BYTE, 0);\r
 229 \r
 230                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[1]);\r
 231 \r
 232                 glBufferData(GL_PIXEL_UNPACK_BUFFER, format_desc_.size, 0, GL_STREAM_DRAW);\r
 233 \r
 234                 auto ptr = glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);\r
 235                 if(ptr)\r
 236                 {\r
 237                         std::copy(frame->image_data().begin(), frame->image_data().end(), reinterpret_cast<char*>(ptr));\r
 238                         glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER); // release the mapped buffer\r
 239                 }\r
 240 \r
 241                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);\r
 242                                 \r
 243                 GL(glClear(GL_COLOR_BUFFER_BIT));                       \r
 244                 glBegin(GL_QUADS);\r
 245                                 glTexCoord2f(0.0f,        1.0f);        glVertex2f(-width_, -height_);\r
 246                                 glTexCoord2f(1.0f,        1.0f);        glVertex2f( width_, -height_);\r
 247                                 glTexCoord2f(1.0f,        0.0f);        glVertex2f( width_,  height_);\r
 248                                 glTexCoord2f(0.0f,        0.0f);        glVertex2f(-width_,  height_);\r
 249                 glEnd();\r
 250                 \r
 251                 glBindTexture(GL_TEXTURE_2D, 0);\r
 252 \r
 253                 std::rotate(pbos_.begin(), pbos_.begin() + 1, pbos_.end());\r
 254 \r
 255                 clock_.tick(1.0/format_desc_.fps);\r
 256         }\r
 257                 \r
 258         void send(const safe_ptr<const core::read_frame>& frame)\r
 259         {\r
 260                 active_.get();\r
 261                 active_ = executor_.begin_invoke([=]\r
 262                 {\r
 263                         perf_timer_.reset();\r
 264                         sf::Event e;\r
 265                         while(window_.GetEvent(e))\r
 266                         {\r
 267                                 if(e.Type == sf::Event::Resized)\r
 268                                          calculate_aspect();\r
 269                         }\r
 270                         render(frame);\r
 271                         window_.Display();\r
 272                         graph_->update_value("frame-time", static_cast<float>(perf_timer_.elapsed()/format_desc_.interval*0.5));\r
 273                 });\r
 274         }\r
 275 \r
 276         std::wstring print() const\r
 277         {\r
 278                 return (parent_printer_ ? parent_printer_() + L"/" : L"") + L"ogl[" + boost::lexical_cast<std::wstring>(screen_index_) + L"]";\r
 279         }\r
 280 \r
 281         size_t buffer_depth() const{return 2;}\r
 282 };\r
 283 \r
 284 ogl_consumer::ogl_consumer(ogl_consumer&& other) : impl_(std::move(other.impl_)){}\r
 285 ogl_consumer::ogl_consumer(unsigned int screen_index, stretch stretch, bool windowed) : impl_(new implementation(screen_index, stretch, windowed)){}\r
 286 void ogl_consumer::send(const safe_ptr<const core::read_frame>& frame){impl_->send(frame);}\r
 287 size_t ogl_consumer::buffer_depth() const{return impl_->buffer_depth();}\r
 288 void ogl_consumer::initialize(const core::video_format_desc& format_desc, const printer& parent_printer){impl_->initialize(format_desc, parent_printer);}\r
 289 std::wstring ogl_consumer::print() const {return impl_->print();}\r
 290 \r
 291 safe_ptr<core::frame_consumer> create_ogl_consumer(const std::vector<std::wstring>& params)\r
 292 {\r
 293         if(params.size() < 1 || params[0] != L"OGL")\r
 294                 return core::frame_consumer::empty();\r
 295         \r
 296         unsigned int screen_index = 0;\r
 297         stretch stretch = stretch::fill;\r
 298         bool windowed = true;\r
 299         \r
 300         if(params.size() > 1) \r
 301                 screen_index = lexical_cast_or_default<int>(params[2], screen_index);\r
 302 \r
 303         if(params.size() > 2) \r
 304                 windowed = lexical_cast_or_default<bool>(params[3], windowed);\r
 305 \r
 306         return make_safe<ogl_consumer>(screen_index, stretch, windowed);\r
 307 }\r
 308 \r
 309 }