git.sesse.net Git - casparcg/blob - core/mixer/image/image_mixer.cpp

   1 #include "../../StdAfx.h"\r
   2 \r
   3 #include "image_mixer.h"\r
   4 #include "image_kernel.h"\r
   5 \r
   6 #include "../gpu/ogl_device.h"\r
   7 #include "../gpu/host_buffer.h"\r
   8 #include "../gpu/device_buffer.h"\r
   9 \r
  10 #include <common/exception/exceptions.h>\r
  11 #include <common/gl/gl_check.h>\r
  12 #include <common/concurrency/executor.h>\r
  13 \r
  14 #include <Glee.h>\r
  15 #include <SFML/Window/Context.hpp>\r
  16 #include <unordered_map>\r
  17 \r
  18 namespace caspar { namespace core {\r
  19                 \r
  20 image_transform::image_transform() \r
  21         : opacity_(1.0)\r
  22         , gain_(1.0)\r
  23         , mode_(video_mode::invalid)\r
  24 {\r
  25         std::fill(pos_.begin(), pos_.end(), 0.0);\r
  26         std::fill(size_.begin(), size_.end(), 1.0);\r
  27         std::fill(uv_.begin(), uv_.end(), 0.0);\r
  28 }\r
  29 \r
  30 void image_transform::set_opacity(double value)\r
  31 {\r
  32         tbb::spin_mutex::scoped_lock(mutex_);   \r
  33         opacity_ = value;\r
  34 }\r
  35 \r
  36 double image_transform::get_opacity() const\r
  37 {\r
  38         tbb::spin_mutex::scoped_lock(mutex_);\r
  39         return opacity_;\r
  40 }\r
  41 \r
  42 void image_transform::set_gain(double value)\r
  43 {\r
  44         tbb::spin_mutex::scoped_lock(mutex_);\r
  45         gain_ = value;\r
  46 }\r
  47 \r
  48 double image_transform::get_gain() const\r
  49 {\r
  50         tbb::spin_mutex::scoped_lock(mutex_);\r
  51         return gain_;\r
  52 }\r
  53 \r
  54 void image_transform::set_position(double x, double y)\r
  55 {\r
  56         std::array<double, 2> value = {x, y};\r
  57         tbb::spin_mutex::scoped_lock(mutex_);\r
  58         pos_ = value;\r
  59 }\r
  60 \r
  61 std::array<double, 2> image_transform::get_position() const\r
  62 {\r
  63         tbb::spin_mutex::scoped_lock(mutex_);\r
  64         return pos_;\r
  65 }\r
  66 \r
  67 void image_transform::set_size(double x, double y)\r
  68 {\r
  69         std::array<double, 2> value = {x, y};\r
  70         tbb::spin_mutex::scoped_lock(mutex_);\r
  71         size_ = value;\r
  72 }\r
  73 \r
  74 std::array<double, 2> image_transform::get_size() const\r
  75 {\r
  76         tbb::spin_mutex::scoped_lock(mutex_);\r
  77         return size_;\r
  78 }\r
  79 \r
  80 void image_transform::set_uv(double left, double top, double right, double bottom)\r
  81 {\r
  82         std::array<double, 4> value = {left, top, right, bottom};\r
  83         tbb::spin_mutex::scoped_lock(mutex_);\r
  84         uv_ = value;\r
  85 }\r
  86 \r
  87 std::array<double, 4> image_transform::get_uv() const\r
  88 {\r
  89         tbb::spin_mutex::scoped_lock(mutex_);\r
  90         return uv_;\r
  91 }\r
  92 \r
  93 void image_transform::set_mode(video_mode::type mode)\r
  94 {\r
  95         tbb::spin_mutex::scoped_lock(mutex_);\r
  96         mode_ = mode;\r
  97 }\r
  98 \r
  99 video_mode::type image_transform::get_mode() const\r
 100 {\r
 101         tbb::spin_mutex::scoped_lock(mutex_);\r
 102         return mode_;\r
 103 }\r
 104 \r
 105 \r
 106 image_transform& image_transform::operator*=(const image_transform &other)\r
 107 {\r
 108         tbb::spin_mutex::scoped_lock(mutex_);\r
 109         opacity_ *= other.opacity_;\r
 110         mode_ = other.mode_;\r
 111         gain_ *= other.gain_;\r
 112         uv_[0] += other.uv_[0];\r
 113         uv_[1] += other.uv_[1];\r
 114         uv_[2] += other.uv_[2];\r
 115         uv_[3] += other.uv_[3];\r
 116         pos_[0] += other.pos_[0];\r
 117         pos_[1] += other.pos_[1];\r
 118         size_[0] *= other.size_[0];\r
 119         size_[1] *= other.size_[1];\r
 120         return *this;\r
 121 }\r
 122 \r
 123 const image_transform image_transform::operator*(const image_transform &other) const\r
 124 {\r
 125         return image_transform(*this) *= other;\r
 126 }\r
 127 \r
 128 struct image_mixer::implementation : boost::noncopyable\r
 129 {                       \r
 130         const video_format_desc format_desc_;\r
 131         \r
 132         std::stack<image_transform> transform_stack_;\r
 133 \r
 134         GLuint fbo_;\r
 135         std::array<std::shared_ptr<device_buffer>, 2> render_targets_;\r
 136 \r
 137         std::shared_ptr<host_buffer> reading_;\r
 138 \r
 139         image_kernel kernel_;\r
 140 \r
 141         safe_ptr<ogl_device> context_;\r
 142 \r
 143 public:\r
 144         implementation(const video_format_desc& format_desc) \r
 145                 : format_desc_(format_desc)\r
 146                 , context_(ogl_device::create())\r
 147         {\r
 148                 context_->begin_invoke([=]\r
 149                 {\r
 150                         transform_stack_.push(image_transform());\r
 151                         transform_stack_.top().set_mode(video_mode::progressive);\r
 152                         transform_stack_.top().set_uv(0.0, 1.0, 1.0, 0.0);\r
 153 \r
 154                         GL(glEnable(GL_TEXTURE_2D));\r
 155                         GL(glDisable(GL_DEPTH_TEST));           \r
 156 \r
 157                         render_targets_[0] = context_->create_device_buffer(format_desc.width, format_desc.height, 4);\r
 158                         render_targets_[1] = context_->create_device_buffer(format_desc.width, format_desc.height, 4);\r
 159                         \r
 160                         GL(glGenFramebuffers(1, &fbo_));                \r
 161                         GL(glBindFramebuffer(GL_FRAMEBUFFER_EXT, fbo_));\r
 162                         GL(glReadBuffer(GL_COLOR_ATTACHMENT0_EXT));\r
 163 \r
 164                         reading_ = context_->create_host_buffer(format_desc_.size, host_buffer::read_only);\r
 165                 });\r
 166         }\r
 167 \r
 168         ~implementation()\r
 169         {\r
 170                 glDeleteFramebuffersEXT(1, &fbo_);\r
 171         }\r
 172 \r
 173         void begin(const image_transform& transform)\r
 174         {\r
 175                 transform_stack_.push(transform_stack_.top()*transform);\r
 176         }\r
 177                 \r
 178         void render(const pixel_format_desc& desc, std::vector<safe_ptr<host_buffer>>& buffers)\r
 179         {\r
 180                 auto transform = transform_stack_.top();\r
 181                 context_->begin_invoke([=]\r
 182                 {\r
 183                         GL(glColor4d(1.0, 1.0, 1.0, transform.get_opacity()));\r
 184                         GL(glViewport(0, 0, format_desc_.width, format_desc_.height));\r
 185                         kernel_.apply(desc.pix_fmt, transform);\r
 186 \r
 187                         std::vector<safe_ptr<device_buffer>> device_buffers;\r
 188                         for(size_t n = 0; n < buffers.size(); ++n)\r
 189                         {\r
 190                                 auto texture = context_->create_device_buffer(desc.planes[n].width, desc.planes[n].height, desc.planes[n].channels);\r
 191                                 texture->read(*buffers[n]);\r
 192                                 device_buffers.push_back(texture);\r
 193                         }\r
 194 \r
 195                         for(size_t n = 0; n < buffers.size(); ++n)\r
 196                         {\r
 197                                 glActiveTexture(GL_TEXTURE0+n);\r
 198                                 device_buffers[n]->bind();\r
 199                         }\r
 200 \r
 201                         auto& p = transform.get_position();\r
 202                         auto& s = transform.get_size();\r
 203                         auto& uv = transform.get_uv();\r
 204 \r
 205                         glBegin(GL_QUADS);\r
 206                                 glTexCoord2d(uv[0], uv[3]); glVertex2d( p[0]*2.0-1.0,             p[1]*2.0-1.0);\r
 207                                 glTexCoord2d(uv[2], uv[3]); glVertex2d((p[0]+s[0])*2.0-1.0,   p[1]*2.0-1.0);\r
 208                                 glTexCoord2d(uv[2], uv[1]); glVertex2d((p[0]+s[0])*2.0-1.0,  (p[1]+s[1])*2.0-1.0);\r
 209                                 glTexCoord2d(uv[0], uv[1]); glVertex2d( p[0]*2.0-1.0,            (p[1]+s[1])*2.0-1.0);\r
 210                         glEnd();\r
 211                 });\r
 212         }\r
 213 \r
 214         void end()\r
 215         {\r
 216                 transform_stack_.pop();\r
 217         }\r
 218 \r
 219         boost::unique_future<safe_ptr<const host_buffer>> begin_pass()\r
 220         {\r
 221                 return context_->begin_invoke([=]() -> safe_ptr<const host_buffer>\r
 222                 {\r
 223                         reading_->map();\r
 224                         render_targets_[0]->attach(0);\r
 225                         GL(glClear(GL_COLOR_BUFFER_BIT));\r
 226                         return safe_ptr<const host_buffer>(reading_);\r
 227                 });\r
 228         }\r
 229 \r
 230         void end_pass()\r
 231         {\r
 232                 context_->begin_invoke([=]\r
 233                 {\r
 234                         reading_ = context_->create_host_buffer(format_desc_.size, host_buffer::read_only);\r
 235                         render_targets_[0]->write(*reading_);\r
 236                         std::rotate(render_targets_.begin(), render_targets_.begin() + 1, render_targets_.end());\r
 237                 });\r
 238         }\r
 239                 \r
 240         std::vector<safe_ptr<host_buffer>> create_buffers(const pixel_format_desc& format)\r
 241         {\r
 242                 std::vector<safe_ptr<host_buffer>> buffers;\r
 243                 std::transform(format.planes.begin(), format.planes.end(), std::back_inserter(buffers), [&](const pixel_format_desc::plane& plane) -> safe_ptr<host_buffer>\r
 244                 {\r
 245                         return context_->create_host_buffer(plane.size, host_buffer::write_only);\r
 246                 });\r
 247                 return buffers;\r
 248         }\r
 249 };\r
 250 \r
 251 image_mixer::image_mixer(const video_format_desc& format_desc) : impl_(new implementation(format_desc)){}\r
 252 void image_mixer::begin(const image_transform& transform) {     impl_->begin(transform);}\r
 253 void image_mixer::process(const pixel_format_desc& desc, std::vector<safe_ptr<host_buffer>>& buffers){  impl_->render(desc, buffers);}\r
 254 void image_mixer::end(){impl_->end();}\r
 255 boost::unique_future<safe_ptr<const host_buffer>> image_mixer::begin_pass(){    return impl_->begin_pass();}\r
 256 void image_mixer::end_pass(){impl_->end_pass();}\r
 257 std::vector<safe_ptr<host_buffer>> image_mixer::create_buffers(const pixel_format_desc& format){return impl_->create_buffers(format);}\r
 258 \r
 259 }}