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.
  41                 frame.interleaved = (pixel_format == bmusb::PixelFormat_8BitYCbCr);
  42
  43                 // Create textures. We don't allocate any data for the second field at this point
  44                 // (just create the texture state with the samplers), since our default assumed
  45                 // resolution is progressive.
  46                 if (pixel_format == bmusb::PixelFormat_10BitYCbCr) {
  47                         glGenTextures(2, userdata[i].tex_v210);
  48                         check_error();
  49                         glGenTextures(2, userdata[i].tex_444);
  50                         check_error();
  51                 } else {
  52                         glGenTextures(2, userdata[i].tex_y);
  53                         check_error();
  54                         glGenTextures(2, userdata[i].tex_cbcr);
  55                         check_error();
  56                 }
  57
  58                 userdata[i].last_width[0] = width;
  59                 userdata[i].last_height[0] = height;
  60                 userdata[i].last_v210_width[0] = 0;
  61
  62                 userdata[i].last_width[1] = 0;
  63                 userdata[i].last_height[1] = 0;
  64                 userdata[i].last_v210_width[1] = 0;
  65
  66                 userdata[i].last_interlaced = false;
  67                 userdata[i].last_has_signal = false;
  68                 userdata[i].last_is_connected = false;
  69                 for (unsigned field = 0; field < 2; ++field) {
  70                         if (pixel_format == bmusb::PixelFormat_10BitYCbCr) {
  71                                 const size_t v210_width = v210Converter::get_minimum_v210_texture_width(width);
  72
  73                                 // Seemingly we need to set the minification filter even though
  74                                 // shader image loads don't use them, or NVIDIA will just give us
  75                                 // zero back.
  76                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_v210[field]);
  77                                 check_error();
  78                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  79                                 check_error();
  80                                 if (field == 0) {
  81                                         userdata[i].last_v210_width[0] = v210_width;
  82                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, v210_width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, NULL);
  83                                         check_error();
  84                                 }
  85
  86                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_444[field]);
  87                                 check_error();
  88                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  89                                 check_error();
  90                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
  91                                 check_error();
  92                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
  93                                 check_error();
  94                                 if (field == 0) {
  95                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, NULL);
  96                                         check_error();
  97                                 }
  98                         } else {
  99                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_y[field]);
 100                                 check_error();
 101                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 102                                 check_error();
 103                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 104                                 check_error();
 105                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 106                                 check_error();
 107                                 if (field == 0) {
 108                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
 109                                         check_error();
 110                                 }
 111
 112                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_cbcr[field]);
 113                                 check_error();
 114                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 115                                 check_error();
 116                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 117                                 check_error();
 118                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 119                                 check_error();
 120                                 if (field == 0) {
 121                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, width / 2, height, 0, GL_RG, GL_UNSIGNED_BYTE, NULL);
 122                                         check_error();
 123                                 }
 124                         }
 125                 }
 126
 127                 freelist.push(frame);
 128         }
 129         glBindBuffer(buffer, 0);
 130         check_error();
 131         glBindTexture(GL_TEXTURE_2D, 0);
 132         check_error();
 133 }
 134
 135 PBOFrameAllocator::~PBOFrameAllocator()
 136 {
 137         while (!freelist.empty()) {
 138                 Frame frame = freelist.front();
 139                 freelist.pop();
 140                 GLuint pbo = ((Userdata *)frame.userdata)->pbo;
 141                 glBindBuffer(buffer, pbo);
 142                 check_error();
 143                 glUnmapBuffer(buffer);
 144                 check_error();
 145                 glBindBuffer(buffer, 0);
 146                 check_error();
 147                 glDeleteBuffers(1, &pbo);
 148                 check_error();
 149                 if (pixel_format == bmusb::PixelFormat_10BitYCbCr) {
 150                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_v210);
 151                         check_error();
 152                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_444);
 153                         check_error();
 154                 } else {
 155                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_y);
 156                         check_error();
 157                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_cbcr);
 158                         check_error();
 159                 }
 160         }
 161 }
 162 //static int sumsum = 0;
 163
 164 bmusb::FrameAllocator::Frame PBOFrameAllocator::alloc_frame()
 165 {
 166         Frame vf;
 167
 168         unique_lock<mutex> lock(freelist_mutex);  // Meh.
 169         if (freelist.empty()) {
 170                 printf("Frame overrun (no more spare PBO frames), dropping frame!\n");
 171         } else {
 172                 //fprintf(stderr, "freelist has %d allocated\n", ++sumsum);
 173                 vf = freelist.front();
 174                 freelist.pop();  // Meh.
 175         }
 176         vf.len = 0;
 177         vf.overflow = 0;
 178         return vf;
 179 }
 180
 181 void PBOFrameAllocator::release_frame(Frame frame)
 182 {
 183         if (frame.overflow > 0) {
 184                 printf("%d bytes overflow after last (PBO) frame\n", int(frame.overflow));
 185         }
 186
 187 #if 0
 188         // Poison the page. (Note that this might be bogus if you don't have an OpenGL context.)
 189         memset(frame.data, 0, frame.size);
 190         Userdata *userdata = (Userdata *)frame.userdata;
 191         for (unsigned field = 0; field < 2; ++field) {
 192                 glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
 193                 check_error();
 194                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 195                 check_error();
 196                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 197                 check_error();
 198                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 199                 check_error();
 200                 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, userdata->last_width[field], userdata->last_height[field], 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
 201                 check_error();
 202
 203                 glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
 204                 check_error();
 205                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 206                 check_error();
 207                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 208                 check_error();
 209                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 210                 check_error();
 211                 glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, userdata->last_width[field] / 2, userdata->last_height[field], 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
 212                 check_error();
 213         }
 214 #endif
 215
 216         unique_lock<mutex> lock(freelist_mutex);
 217         freelist.push(frame);
 218         //--sumsum;
 219 }