git.sesse.net Git - nageru/blob - pbo_frame_allocator.cpp

   1 #include "pbo_frame_allocator.h"
   2
   3 #include <bmusb/bmusb.h>
   4 #include <movit/util.h>
   5 #include <stdbool.h>
   6 #include <stdint.h>
   7 #include <stdio.h>
   8 #include <cstddef>
   9
  10 #include "v210_converter.h"
  11
  12 using namespace std;
  13
  14 PBOFrameAllocator::PBOFrameAllocator(bmusb::PixelFormat pixel_format, size_t frame_size, GLuint width, GLuint height, size_t num_queued_frames, GLenum buffer, GLenum permissions, GLenum map_bits)
  15         : pixel_format(pixel_format), buffer(buffer)
  16 {
  17         userdata.reset(new Userdata[num_queued_frames]);
  18         for (size_t i = 0; i < num_queued_frames; ++i) {
  19                 GLuint pbo;
  20                 glGenBuffers(1, &pbo);
  21                 check_error();
  22                 glBindBuffer(buffer, pbo);
  23                 check_error();
  24                 glBufferStorage(buffer, frame_size, NULL, permissions | GL_MAP_PERSISTENT_BIT);
  25                 check_error();
  26
  27                 Frame frame;
  28                 frame.data = (uint8_t *)glMapBufferRange(buffer, 0, frame_size, permissions | map_bits | GL_MAP_PERSISTENT_BIT);
  29                 frame.data2 = frame.data + frame_size / 2;
  30                 check_error();
  31                 frame.size = frame_size;
  32                 frame.userdata = &userdata[i];
  33                 userdata[i].pbo = pbo;
  34                 userdata[i].pixel_format = pixel_format;
  35                 frame.owner = this;
  36
  37                 // For 8-bit Y'CbCr, we ask the driver to split Y' and Cb/Cr
  38                 // into separate textures. For 10-bit, the input format (v210)
  39                 // is complicated enough that we need to interpolate up to 4:4:4,
  40                 // which we do in a compute shader ourselves. For RGBA, the data
  41                 // is already 4:4:4:4.
  42                 frame.interleaved = (pixel_format == bmusb::PixelFormat_8BitYCbCr);
  43
  44                 // Create textures. We don't allocate any data for the second field at this point
  45                 // (just create the texture state with the samplers), since our default assumed
  46                 // resolution is progressive.
  47                 switch (pixel_format) {
  48                 case bmusb::PixelFormat_8BitYCbCr:
  49                         glGenTextures(2, userdata[i].tex_y);
  50                         check_error();
  51                         glGenTextures(2, userdata[i].tex_cbcr);
  52                         check_error();
  53                         break;
  54                 case bmusb::PixelFormat_10BitYCbCr:
  55                         glGenTextures(2, userdata[i].tex_v210);
  56                         check_error();
  57                         glGenTextures(2, userdata[i].tex_444);
  58                         check_error();
  59                         break;
  60                 case bmusb::PixelFormat_8BitRGBA:
  61                         glGenTextures(2, userdata[i].tex_rgba);
  62                         check_error();
  63                         break;
  64                 }
  65
  66                 userdata[i].last_width[0] = width;
  67                 userdata[i].last_height[0] = height;
  68                 userdata[i].last_v210_width[0] = 0;
  69
  70                 userdata[i].last_width[1] = 0;
  71                 userdata[i].last_height[1] = 0;
  72                 userdata[i].last_v210_width[1] = 0;
  73
  74                 userdata[i].last_interlaced = false;
  75                 userdata[i].last_has_signal = false;
  76                 userdata[i].last_is_connected = false;
  77                 for (unsigned field = 0; field < 2; ++field) {
  78                         switch (pixel_format) {
  79                         case bmusb::PixelFormat_10BitYCbCr: {
  80                                 const size_t v210_width = v210Converter::get_minimum_v210_texture_width(width);
  81
  82                                 // Seemingly we need to set the minification filter even though
  83                                 // shader image loads don't use them, or NVIDIA will just give us
  84                                 // zero back.
  85                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_v210[field]);
  86                                 check_error();
  87                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  88                                 check_error();
  89                                 if (field == 0) {
  90                                         userdata[i].last_v210_width[0] = v210_width;
  91                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, v210_width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, NULL);
  92                                         check_error();
  93                                 }
  94
  95                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_444[field]);
  96                                 check_error();
  97                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  98                                 check_error();
  99                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 100                                 check_error();
 101                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 102                                 check_error();
 103                                 if (field == 0) {
 104                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, NULL);
 105                                         check_error();
 106                                 }
 107                                 break;
 108                         }
 109                         case bmusb::PixelFormat_8BitYCbCr:
 110                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_y[field]);
 111                                 check_error();
 112                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 113                                 check_error();
 114                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 115                                 check_error();
 116                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 117                                 check_error();
 118                                 if (field == 0) {
 119                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
 120                                         check_error();
 121                                 }
 122
 123                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_cbcr[field]);
 124                                 check_error();
 125                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 126                                 check_error();
 127                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 128                                 check_error();
 129                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 130                                 check_error();
 131                                 if (field == 0) {
 132                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, width / 2, height, 0, GL_RG, GL_UNSIGNED_BYTE, NULL);
 133                                         check_error();
 134                                 }
 135                                 break;
 136                         case bmusb::PixelFormat_8BitRGBA:
 137                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_rgba[field]);
 138                                 check_error();
 139                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 140                                 check_error();
 141                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 142                                 check_error();
 143                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 144                                 check_error();
 145                                 if (field == 0) {
 146                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
 147                                         check_error();
 148                                 }
 149                                 break;
 150                         default:
 151                                 assert(false);
 152                         }
 153                 }
 154
 155                 freelist.push(frame);
 156         }
 157         glBindBuffer(buffer, 0);
 158         check_error();
 159         glBindTexture(GL_TEXTURE_2D, 0);
 160         check_error();
 161 }
 162
 163 PBOFrameAllocator::~PBOFrameAllocator()
 164 {
 165         while (!freelist.empty()) {
 166                 Frame frame = freelist.front();
 167                 freelist.pop();
 168                 GLuint pbo = ((Userdata *)frame.userdata)->pbo;
 169                 glBindBuffer(buffer, pbo);
 170                 check_error();
 171                 glUnmapBuffer(buffer);
 172                 check_error();
 173                 glBindBuffer(buffer, 0);
 174                 check_error();
 175                 glDeleteBuffers(1, &pbo);
 176                 check_error();
 177                 switch (pixel_format) {
 178                 case bmusb::PixelFormat_10BitYCbCr:
 179                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_v210);
 180                         check_error();
 181                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_444);
 182                         check_error();
 183                         break;
 184                 case bmusb::PixelFormat_8BitYCbCr:
 185                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_y);
 186                         check_error();
 187                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_cbcr);
 188                         check_error();
 189                         break;
 190                 case bmusb::PixelFormat_8BitRGBA:
 191                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_rgba);
 192                         check_error();
 193                         break;
 194                 default:
 195                         assert(false);
 196                 }
 197         }
 198 }
 199 //static int sumsum = 0;
 200
 201 bmusb::FrameAllocator::Frame PBOFrameAllocator::alloc_frame()
 202 {
 203         Frame vf;
 204
 205         unique_lock<mutex> lock(freelist_mutex);  // Meh.
 206         if (freelist.empty()) {
 207                 printf("Frame overrun (no more spare PBO frames), dropping frame!\n");
 208         } else {
 209                 //fprintf(stderr, "freelist has %d allocated\n", ++sumsum);
 210                 vf = freelist.front();
 211                 freelist.pop();  // Meh.
 212         }
 213         vf.len = 0;
 214         vf.overflow = 0;
 215         return vf;
 216 }
 217
 218 void PBOFrameAllocator::release_frame(Frame frame)
 219 {
 220         if (frame.overflow > 0) {
 221                 printf("%d bytes overflow after last (PBO) frame\n", int(frame.overflow));
 222         }
 223
 224 #if 0
 225         // Poison the page. (Note that this might be bogus if you don't have an OpenGL context.)
 226         memset(frame.data, 0, frame.size);
 227         Userdata *userdata = (Userdata *)frame.userdata;
 228         for (unsigned field = 0; field < 2; ++field) {
 229                 glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
 230                 check_error();
 231                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 232                 check_error();
 233                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 234                 check_error();
 235                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 236                 check_error();
 237                 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, userdata->last_width[field], userdata->last_height[field], 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
 238                 check_error();
 239
 240                 glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
 241                 check_error();
 242                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 243                 check_error();
 244                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 245                 check_error();
 246                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 247                 check_error();
 248                 glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, userdata->last_width[field] / 2, userdata->last_height[field], 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
 249                 check_error();
 250         }
 251 #endif
 252
 253         unique_lock<mutex> lock(freelist_mutex);
 254         freelist.push(frame);
 255         //--sumsum;
 256 }