git.sesse.net Git - casparcg/blob - core/consumer/ogl/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 #include "../../StdAfx.h"\r
  22 \r
  23 #include "ogl_consumer.h"\r
  24 \r
  25 #include <core/video_format.h>\r
  26 #include <mixer/frame/read_frame.h>\r
  27 \r
  28 #include <common/gl/gl_check.h>\r
  29 #include <common/concurrency/executor.h>\r
  30 #include <common/memory/safe_ptr.h>\r
  31 \r
  32 #include <boost/thread.hpp>\r
  33 \r
  34 #include <Glee.h>\r
  35 #include <SFML/Window.hpp>\r
  36 \r
  37 #include <windows.h>\r
  38 \r
  39 #include <algorithm>\r
  40 \r
  41 namespace caspar { namespace core {\r
  42 \r
  43 struct ogl_consumer::implementation : boost::noncopyable\r
  44 {                       \r
  45         boost::unique_future<void> active_;\r
  46         \r
  47         float wratio_;\r
  48         float hratio_;\r
  49         \r
  50         float wSize_;\r
  51         float hSize_;\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         unsigned int screen_x_;\r
  60         unsigned int screen_y_;\r
  61         const unsigned int screen_index_;\r
  62                                 \r
  63         const stretch stretch_;\r
  64         video_format_desc format_desc_;\r
  65         \r
  66         sf::Window window_;\r
  67         \r
  68         executor executor_;\r
  69 public:\r
  70         implementation(unsigned int screen_index, stretch stretch, bool windowed) \r
  71                 : stretch_(stretch)\r
  72                 , windowed_(windowed)\r
  73                 , texture_(0)\r
  74                 , screen_x_(0)\r
  75                 , screen_y_(0)\r
  76                 , screen_index_(screen_index)\r
  77         {               \r
  78                 CASPAR_LOG(info) << "Sucessfully started ogl_consumer";\r
  79         }\r
  80 \r
  81         ~implementation()\r
  82         {\r
  83                 CASPAR_LOG(info) << "Sucessfully ended ogl_consumer";\r
  84         }\r
  85 \r
  86         void initialize(const video_format_desc& format_desc)\r
  87         {\r
  88                 format_desc_ = format_desc;\r
  89 \r
  90                 screen_width_ = format_desc.width;\r
  91                 screen_height_ = format_desc.height;\r
  92 #ifdef _WIN32\r
  93                 DISPLAY_DEVICE d_device;                        \r
  94                 memset(&d_device, 0, sizeof(d_device));\r
  95                 d_device.cb = sizeof(d_device);\r
  96 \r
  97                 std::vector<DISPLAY_DEVICE> displayDevices;\r
  98                 for(int n = 0; EnumDisplayDevices(NULL, n, &d_device, NULL); ++n)\r
  99                 {\r
 100                         displayDevices.push_back(d_device);\r
 101                         memset(&d_device, 0, sizeof(d_device));\r
 102                         d_device.cb = sizeof(d_device);\r
 103                 }\r
 104 \r
 105                 if(screen_index_ >= displayDevices.size())\r
 106                         BOOST_THROW_EXCEPTION(out_of_range() << arg_name_info("screen_index_"));\r
 107                 \r
 108                 DEVMODE devmode;\r
 109                 memset(&devmode, 0, sizeof(devmode));\r
 110                 \r
 111                 if(!EnumDisplaySettings(displayDevices[screen_index_].DeviceName, ENUM_CURRENT_SETTINGS, &devmode))\r
 112                         BOOST_THROW_EXCEPTION(invalid_operation() << arg_name_info("screen_index") << msg_info("EnumDisplaySettings"));\r
 113                 \r
 114                 screen_width_ = windowed_ ? format_desc_.width : devmode.dmPelsWidth;\r
 115                 screen_height_ = windowed_ ? format_desc_.height : devmode.dmPelsHeight;\r
 116                 screen_x_ = devmode.dmPosition.x;\r
 117                 screen_y_ = devmode.dmPosition.y;\r
 118 #else\r
 119                 if(!windowed)\r
 120                         BOOST_THROW_EXCEPTION(not_supported() << msg_info("OGLConsumer doesn't support non-Win32 fullscreen"));\r
 121 \r
 122                 if(screen_index != 0)\r
 123                         CASPAR_LOG(warning) << "OGLConsumer only supports screen_index=0 for non-Win32";\r
 124 #endif\r
 125 \r
 126                 executor_.start();\r
 127                 executor_.invoke([=]\r
 128                 {\r
 129                         window_.Create(sf::VideoMode(format_desc_.width, format_desc_.height, 32), "CasparCG", windowed_ ? sf::Style::Titlebar : sf::Style::Fullscreen);\r
 130                         window_.ShowMouseCursor(false);\r
 131                         window_.SetPosition(screen_x_, screen_y_);\r
 132                         window_.SetSize(screen_width_, screen_height_);\r
 133                         window_.SetActive();\r
 134                         GL(glEnable(GL_TEXTURE_2D));\r
 135                         GL(glDisable(GL_DEPTH_TEST));           \r
 136                         GL(glClearColor(0.0, 0.0, 0.0, 0.0));\r
 137                         GL(glViewport(0, 0, format_desc_.width, format_desc_.height));\r
 138                         glLoadIdentity();\r
 139                                 \r
 140                         wratio_ = static_cast<float>(format_desc_.width)/static_cast<float>(format_desc_.width);\r
 141                         hratio_ = static_cast<float>(format_desc_.height)/static_cast<float>(format_desc_.height);\r
 142 \r
 143                         std::pair<float, float> target_ratio = None();\r
 144                         if(stretch_ == fill)\r
 145                                 target_ratio = Fill();\r
 146                         else if(stretch_ == uniform)\r
 147                                 target_ratio = Uniform();\r
 148                         else if(stretch_ == uniform_to_fill)\r
 149                                 target_ratio = UniformToFill();\r
 150 \r
 151                         wSize_ = target_ratio.first;\r
 152                         hSize_ = target_ratio.second;\r
 153                         \r
 154                         glGenTextures(1, &texture_);\r
 155                         glBindTexture(GL_TEXTURE_2D, texture_);\r
 156                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);\r
 157                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);\r
 158                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);\r
 159                         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);\r
 160                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, format_desc_.width, format_desc_.height, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0);\r
 161                         glBindTexture(GL_TEXTURE_2D, 0);\r
 162                         \r
 163                         GL(glGenBuffers(2, pbos_.data()));\r
 164                         \r
 165                         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[0]);\r
 166                         glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 167                         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[1]);\r
 168                         glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 169                         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);\r
 170                 });\r
 171                 active_ = executor_.begin_invoke([]{});\r
 172         }\r
 173         \r
 174         std::pair<float, float> None()\r
 175         {\r
 176                 float width = static_cast<float>(format_desc_.width)/static_cast<float>(screen_width_);\r
 177                 float height = static_cast<float>(format_desc_.height)/static_cast<float>(screen_height_);\r
 178 \r
 179                 return std::make_pair(width, height);\r
 180         }\r
 181 \r
 182         std::pair<float, float> Uniform()\r
 183         {\r
 184                 float aspect = static_cast<float>(format_desc_.width)/static_cast<float>(format_desc_.height);\r
 185                 float width = std::min(1.0f, static_cast<float>(screen_height_)*aspect/static_cast<float>(screen_width_));\r
 186                 float height = static_cast<float>(screen_width_*width)/static_cast<float>(screen_height_*aspect);\r
 187 \r
 188                 return std::make_pair(width, height);\r
 189         }\r
 190 \r
 191         std::pair<float, float> Fill()\r
 192         {\r
 193                 return std::make_pair(1.0f, 1.0f);\r
 194         }\r
 195 \r
 196         std::pair<float, float> UniformToFill()\r
 197         {\r
 198                 float wr = static_cast<float>(format_desc_.width)/static_cast<float>(screen_width_);\r
 199                 float hr = static_cast<float>(format_desc_.height)/static_cast<float>(screen_height_);\r
 200                 float r_inv = 1.0f/std::min(wr, hr);\r
 201 \r
 202                 float width = wr*r_inv;\r
 203                 float height = hr*r_inv;\r
 204 \r
 205                 return std::make_pair(width, height);\r
 206         }\r
 207 \r
 208         void render(const safe_ptr<const read_frame>& frame)\r
 209         {                       \r
 210                 glBindTexture(GL_TEXTURE_2D, texture_);\r
 211                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[0]);\r
 212 \r
 213                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, format_desc_.width, format_desc_.height, GL_BGRA, GL_UNSIGNED_BYTE, 0);\r
 214 \r
 215                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[1]);\r
 216 \r
 217                 glBufferData(GL_PIXEL_UNPACK_BUFFER, format_desc_.size, 0, GL_STREAM_DRAW);\r
 218 \r
 219                 auto ptr = glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);\r
 220                 if(ptr)\r
 221                 {\r
 222                         std::copy_n(frame->image_data().begin(), frame->image_data().size(), reinterpret_cast<char*>(ptr));\r
 223                         glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER); // release the mapped buffer\r
 224                 }\r
 225 \r
 226                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);\r
 227                                 \r
 228                 GL(glClear(GL_COLOR_BUFFER_BIT));                       \r
 229                 glBegin(GL_QUADS);\r
 230                                 glTexCoord2f(0.0f,        hratio_);     glVertex2f(-wSize_, -hSize_);\r
 231                                 glTexCoord2f(wratio_, hratio_); glVertex2f( wSize_, -hSize_);\r
 232                                 glTexCoord2f(wratio_, 0.0f);    glVertex2f( wSize_,  hSize_);\r
 233                                 glTexCoord2f(0.0f,        0.0f);        glVertex2f(-wSize_,  hSize_);\r
 234                 glEnd();\r
 235                 \r
 236                 glBindTexture(GL_TEXTURE_2D, 0);\r
 237 \r
 238                 std::rotate(pbos_.begin(), pbos_.begin() + 1, pbos_.end());\r
 239         }\r
 240                 \r
 241         void send(const safe_ptr<const read_frame>& frame)\r
 242         {\r
 243                 active_.get();\r
 244                 active_ = executor_.begin_invoke([=]\r
 245                 {\r
 246                         sf::Event e;\r
 247                         while(window_.GetEvent(e)){}\r
 248                         render(frame);\r
 249                         window_.Display();\r
 250                 });\r
 251         }\r
 252 \r
 253         size_t buffer_depth() const{return 2;}\r
 254 };\r
 255 \r
 256 ogl_consumer::ogl_consumer(ogl_consumer&& other) : impl_(std::move(other.impl_)){}\r
 257 ogl_consumer::ogl_consumer(unsigned int screen_index, stretch stretch, bool windowed) : impl_(new implementation(screen_index, stretch, windowed)){}\r
 258 void ogl_consumer::send(const safe_ptr<const read_frame>& frame){impl_->send(frame);}\r
 259 size_t ogl_consumer::buffer_depth() const{return impl_->buffer_depth();}\r
 260 void ogl_consumer::initialize(const video_format_desc& format_desc){impl_->initialize(format_desc);}\r
 261 \r
 262 safe_ptr<frame_consumer> create_ogl_consumer(const std::vector<std::wstring>& params)\r
 263 {\r
 264         if(params.size() < 1 || params[0] != L"OGL")\r
 265                 return frame_consumer::empty();\r
 266         \r
 267         unsigned int screen_index = 0;\r
 268         stretch stretch = stretch::fill;\r
 269         bool windowed = true;\r
 270         \r
 271         try{if(params.size() > 1) screen_index = boost::lexical_cast<int>(params[2]);}\r
 272         catch(boost::bad_lexical_cast&){}\r
 273         try{if(params.size() > 2) windowed = boost::lexical_cast<bool>(params[3]);}\r
 274         catch(boost::bad_lexical_cast&){}\r
 275 \r
 276         return make_safe<ogl_consumer>(screen_index, stretch, windowed);\r
 277 }\r
 278 \r
 279 }}\r