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 "flags.h"
  11
  12 using namespace std;
  13
  14 PBOFrameAllocator::PBOFrameAllocator(size_t frame_size, GLuint width, GLuint height, size_t num_queued_frames, GLenum buffer, GLenum permissions, GLenum map_bits)
  15         : 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                 frame.owner = this;
  35
  36                 // For 8-bit Y'CbCr, we ask the driver to split Y' and Cb/Cr
  37                 // into separate textures. For 10-bit, the input format (v210)
  38                 // is complicated enough that we need to interpolate up to 4:4:4,
  39                 // which we do in a compute shader ourselves.
  40                 frame.interleaved = !global_flags.ten_bit_input;
  41
  42                 // Create textures. We don't allocate any data for the second field at this point
  43                 // (just create the texture state with the samplers), since our default assumed
  44                 // resolution is progressive.
  45                 if (global_flags.ten_bit_input) {
  46                         glGenTextures(2, userdata[i].tex_v210);
  47                         check_error();
  48                         glGenTextures(2, userdata[i].tex_444);
  49                         check_error();
  50                 } else {
  51                         glGenTextures(2, userdata[i].tex_y);
  52                         check_error();
  53                         glGenTextures(2, userdata[i].tex_cbcr);
  54                         check_error();
  55                 }
  56                 userdata[i].last_width[0] = width;
  57                 userdata[i].last_height[0] = height;
  58                 userdata[i].last_width[1] = 0;
  59                 userdata[i].last_height[1] = 0;
  60                 userdata[i].last_interlaced = false;
  61                 userdata[i].last_has_signal = false;
  62                 userdata[i].last_is_connected = false;
  63                 for (unsigned field = 0; field < 2; ++field) {
  64                         if (global_flags.ten_bit_input) {
  65                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_v210[field]);
  66                                 check_error();
  67                                 // Don't care about texture parameters, we're only going to read it
  68                                 // from the compute shader anyway.
  69                                 if (field == 0) {
  70                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, NULL);
  71                                         check_error();
  72                                 }
  73
  74                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_444[field]);
  75                                 check_error();
  76                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  77                                 check_error();
  78                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
  79                                 check_error();
  80                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
  81                                 check_error();
  82                                 if (field == 0) {
  83                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, NULL);
  84                                         check_error();
  85                                 }
  86                         } else {
  87                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_y[field]);
  88                                 check_error();
  89                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  90                                 check_error();
  91                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
  92                                 check_error();
  93                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
  94                                 check_error();
  95                                 if (field == 0) {
  96                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
  97                                         check_error();
  98                                 }
  99
 100                                 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_cbcr[field]);
 101                                 check_error();
 102                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 103                                 check_error();
 104                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 105                                 check_error();
 106                                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 107                                 check_error();
 108                                 if (field == 0) {
 109                                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, width / 2, height, 0, GL_RG, GL_UNSIGNED_BYTE, NULL);
 110                                         check_error();
 111                                 }
 112                         }
 113                 }
 114
 115                 freelist.push(frame);
 116         }
 117         glBindBuffer(buffer, 0);
 118         check_error();
 119         glBindTexture(GL_TEXTURE_2D, 0);
 120         check_error();
 121 }
 122
 123 PBOFrameAllocator::~PBOFrameAllocator()
 124 {
 125         while (!freelist.empty()) {
 126                 Frame frame = freelist.front();
 127                 freelist.pop();
 128                 GLuint pbo = ((Userdata *)frame.userdata)->pbo;
 129                 glBindBuffer(buffer, pbo);
 130                 check_error();
 131                 glUnmapBuffer(buffer);
 132                 check_error();
 133                 glBindBuffer(buffer, 0);
 134                 check_error();
 135                 glDeleteBuffers(1, &pbo);
 136                 check_error();
 137                 if (global_flags.ten_bit_input) {
 138                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_v210);
 139                         check_error();
 140                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_444);
 141                         check_error();
 142                 } else {
 143                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_y);
 144                         check_error();
 145                         glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_cbcr);
 146                         check_error();
 147                 }
 148         }
 149 }
 150 //static int sumsum = 0;
 151
 152 bmusb::FrameAllocator::Frame PBOFrameAllocator::alloc_frame()
 153 {
 154         Frame vf;
 155
 156         unique_lock<mutex> lock(freelist_mutex);  // Meh.
 157         if (freelist.empty()) {
 158                 printf("Frame overrun (no more spare PBO frames), dropping frame!\n");
 159         } else {
 160                 //fprintf(stderr, "freelist has %d allocated\n", ++sumsum);
 161                 vf = freelist.front();
 162                 freelist.pop();  // Meh.
 163         }
 164         vf.len = 0;
 165         vf.overflow = 0;
 166         return vf;
 167 }
 168
 169 void PBOFrameAllocator::release_frame(Frame frame)
 170 {
 171         if (frame.overflow > 0) {
 172                 printf("%d bytes overflow after last (PBO) frame\n", int(frame.overflow));
 173         }
 174
 175 #if 0
 176         // Poison the page. (Note that this might be bogus if you don't have an OpenGL context.)
 177         memset(frame.data, 0, frame.size);
 178         Userdata *userdata = (Userdata *)frame.userdata;
 179         for (unsigned field = 0; field < 2; ++field) {
 180                 glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
 181                 check_error();
 182                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 183                 check_error();
 184                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 185                 check_error();
 186                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 187                 check_error();
 188                 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, userdata->last_width[field], userdata->last_height[field], 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
 189                 check_error();
 190
 191                 glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
 192                 check_error();
 193                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 194                 check_error();
 195                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 196                 check_error();
 197                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 198                 check_error();
 199                 glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, userdata->last_width[field] / 2, userdata->last_height[field], 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
 200                 check_error();
 201         }
 202 #endif
 203
 204         unique_lock<mutex> lock(freelist_mutex);
 205         freelist.push(frame);
 206         //--sumsum;
 207 }