git.sesse.net Git - movit/blob - test_util.cpp

   1 #include <assert.h>
   2 #include <math.h>
   3 #include <stdio.h>
   4 #include <algorithm>
   5 #include <epoxy/gl.h>
   6 #include <gtest/gtest.h>
   7 #include <gtest/gtest-message.h>
   8
   9 #include "flat_input.h"
  10 #include "init.h"
  11 #include "resource_pool.h"
  12 #include "test_util.h"
  13 #include "util.h"
  14
  15 using namespace std;
  16
  17 namespace movit {
  18
  19 class Input;
  20
  21 namespace {
  22
  23 // Not thread-safe, but this isn't a big problem for testing.
  24 ResourcePool *get_static_pool()
  25 {
  26         static ResourcePool *resource_pool = NULL;
  27         if (!resource_pool) {
  28                 resource_pool = new ResourcePool();
  29         }
  30         return resource_pool;
  31 }
  32
  33 // Flip upside-down to compensate for different origin.
  34 template<class T>
  35 void vertical_flip(T *data, unsigned width, unsigned height)
  36 {
  37         for (unsigned y = 0; y < height / 2; ++y) {
  38                 unsigned flip_y = height - y - 1;
  39                 for (unsigned x = 0; x < width; ++x) {
  40                         swap(data[y * width + x], data[flip_y * width + x]);
  41                 }
  42         }
  43 }
  44
  45 }  // namespace
  46
  47 EffectChainTester::EffectChainTester(const float *data, unsigned width, unsigned height,
  48                                      MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve,
  49                                      GLenum framebuffer_format)
  50         : chain(width, height, get_static_pool()), width(width), height(height), finalized(false)
  51 {
  52         CHECK(init_movit(".", MOVIT_DEBUG_OFF));
  53
  54         if (data != NULL) {
  55                 add_input(data, pixel_format, color_space, gamma_curve);
  56         }
  57
  58         glGenTextures(1, &texnum);
  59         check_error();
  60         glBindTexture(GL_TEXTURE_2D, texnum);
  61         check_error();
  62         glTexImage2D(GL_TEXTURE_2D, 0, framebuffer_format, width, height, 0, GL_RGBA, GL_FLOAT, NULL);
  63         check_error();
  64
  65         glGenFramebuffers(1, &fbo);
  66         check_error();
  67         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
  68         check_error();
  69         glFramebufferTexture2D(
  70                 GL_FRAMEBUFFER,
  71                 GL_COLOR_ATTACHMENT0,
  72                 GL_TEXTURE_2D,
  73                 texnum,
  74                 0);
  75         check_error();
  76         glBindFramebuffer(GL_FRAMEBUFFER, 0);
  77         check_error();
  78 }
  79
  80 EffectChainTester::~EffectChainTester()
  81 {
  82         glDeleteFramebuffers(1, &fbo);
  83         check_error();
  84         glDeleteTextures(1, &texnum);
  85         check_error();
  86 }
  87
  88 Input *EffectChainTester::add_input(const float *data, MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve, int input_width, int input_height)
  89 {
  90         ImageFormat format;
  91         format.color_space = color_space;
  92         format.gamma_curve = gamma_curve;
  93
  94         if (input_width == -1) {
  95                 input_width = width;
  96         }
  97         if (input_height == -1) {
  98                 input_height = height;
  99         }
 100
 101         FlatInput *input = new FlatInput(format, pixel_format, GL_FLOAT, input_width, input_height);
 102         input->set_pixel_data(data);
 103         chain.add_input(input);
 104         return input;
 105 }
 106
 107 Input *EffectChainTester::add_input(const unsigned char *data, MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve, int input_width, int input_height)
 108 {
 109         ImageFormat format;
 110         format.color_space = color_space;
 111         format.gamma_curve = gamma_curve;
 112
 113         if (input_width == -1) {
 114                 input_width = width;
 115         }
 116         if (input_height == -1) {
 117                 input_height = height;
 118         }
 119
 120         FlatInput *input = new FlatInput(format, pixel_format, GL_UNSIGNED_BYTE, input_width, input_height);
 121         input->set_pixel_data(data);
 122         chain.add_input(input);
 123         return input;
 124 }
 125
 126 void EffectChainTester::run(float *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 127 {
 128         if (!finalized) {
 129                 finalize_chain(color_space, gamma_curve, alpha_format);
 130         }
 131
 132         chain.render_to_fbo(fbo, width, height);
 133
 134         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 135         check_error();
 136         if (!epoxy_is_desktop_gl() && format == GL_RED) {
 137                 // GLES will only read GL_RGBA.
 138                 float *temp = new float[width * height * 4];
 139                 glReadPixels(0, 0, width, height, GL_RGBA, GL_FLOAT, temp);
 140                 check_error();
 141                 for (int i = 0; i < width * height; ++i) {
 142                         out_data[i] = temp[i * 4];
 143                 }
 144                 delete[] temp;
 145         } else {
 146                 glReadPixels(0, 0, width, height, format, GL_FLOAT, out_data);
 147                 check_error();
 148         }
 149
 150         if (format == GL_RGBA) {
 151                 width *= 4;
 152         }
 153
 154         vertical_flip(out_data, width, height);
 155 }
 156
 157 void EffectChainTester::run(unsigned char *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 158 {
 159         if (!finalized) {
 160                 finalize_chain(color_space, gamma_curve, alpha_format);
 161         }
 162
 163         chain.render_to_fbo(fbo, width, height);
 164
 165         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 166         check_error();
 167         if (!epoxy_is_desktop_gl() && format == GL_RED) {
 168                 // GLES will only read GL_RGBA.
 169                 unsigned char *temp = new unsigned char[width * height * 4];
 170                 glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, temp);
 171                 check_error();
 172                 for (int i = 0; i < width * height; ++i) {
 173                         out_data[i] = temp[i * 4];
 174                 }
 175                 delete[] temp;
 176         } else {
 177                 glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, out_data);
 178                 check_error();
 179         }
 180
 181         if (format == GL_RGBA) {
 182                 width *= 4;
 183         }
 184
 185         vertical_flip(out_data, width, height);
 186 }
 187
 188 void EffectChainTester::finalize_chain(Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 189 {
 190         assert(!finalized);
 191         ImageFormat image_format;
 192         image_format.color_space = color_space;
 193         image_format.gamma_curve = gamma_curve;
 194         chain.add_output(image_format, alpha_format);
 195         chain.finalize();
 196         finalized = true;
 197 }
 198
 199 void expect_equal(const float *ref, const float *result, unsigned width, unsigned height, float largest_difference_limit, float rms_limit)
 200 {
 201         float largest_difference = -1.0f;
 202         float squared_difference = 0.0f;
 203         int largest_diff_x = -1, largest_diff_y = -1;
 204
 205         for (unsigned y = 0; y < height; ++y) {
 206                 for (unsigned x = 0; x < width; ++x) {
 207                         float diff = ref[y * width + x] - result[y * width + x];
 208                         if (fabs(diff) > largest_difference) {
 209                                 largest_difference = fabs(diff);
 210                                 largest_diff_x = x;
 211                                 largest_diff_y = y;
 212                         }
 213                         squared_difference += diff * diff;
 214                 }
 215         }
 216
 217         EXPECT_LT(largest_difference, largest_difference_limit)
 218                 << "Largest difference is in x=" << largest_diff_x << ", y=" << largest_diff_y << ":\n"
 219                 << "Reference: " << ref[largest_diff_y * width + largest_diff_x] << "\n"
 220                 << "Result:    " << result[largest_diff_y * width + largest_diff_x];
 221
 222         float rms = sqrt(squared_difference) / (width * height);
 223         EXPECT_LT(rms, rms_limit);
 224
 225         if (largest_difference >= largest_difference_limit || rms >= rms_limit) {
 226                 fprintf(stderr, "Dumping matrices for easier debugging, since at least one test failed.\n");
 227
 228                 fprintf(stderr, "Reference:\n");
 229                 for (unsigned y = 0; y < height; ++y) {
 230                         for (unsigned x = 0; x < width; ++x) {
 231                                 fprintf(stderr, "%7.4f ", ref[y * width + x]);
 232                         }
 233                         fprintf(stderr, "\n");
 234                 }
 235
 236                 fprintf(stderr, "\nResult:\n");
 237                 for (unsigned y = 0; y < height; ++y) {
 238                         for (unsigned x = 0; x < width; ++x) {
 239                                 fprintf(stderr, "%7.4f ", result[y * width + x]);
 240                         }
 241                         fprintf(stderr, "\n");
 242                 }
 243         }
 244 }
 245
 246 void expect_equal(const unsigned char *ref, const unsigned char *result, unsigned width, unsigned height, unsigned largest_difference_limit, float rms_limit)
 247 {
 248         assert(width > 0);
 249         assert(height > 0);
 250
 251         float *ref_float = new float[width * height];
 252         float *result_float = new float[width * height];
 253
 254         for (unsigned y = 0; y < height; ++y) {
 255                 for (unsigned x = 0; x < width; ++x) {
 256                         ref_float[y * width + x] = ref[y * width + x];
 257                         result_float[y * width + x] = result[y * width + x];
 258                 }
 259         }
 260
 261         expect_equal(ref_float, result_float, width, height, largest_difference_limit, rms_limit);
 262
 263         delete[] ref_float;
 264         delete[] result_float;
 265 }
 266
 267 void test_accuracy(const float *expected, const float *result, unsigned num_values, double absolute_error_limit, double relative_error_limit, double local_relative_error_limit, double rms_limit)
 268 {
 269         double squared_difference = 0.0;
 270         for (unsigned i = 0; i < num_values; ++i) {
 271                 double absolute_error = fabs(expected[i] - result[i]);
 272                 squared_difference += absolute_error * absolute_error;
 273                 EXPECT_LT(absolute_error, absolute_error_limit);
 274
 275                 if (expected[i] > 0.0) {
 276                         double relative_error = fabs(absolute_error / expected[i]);
 277
 278                         EXPECT_LT(relative_error, relative_error_limit);
 279                 }
 280                 if (i < num_values - 1) {
 281                         double delta = expected[i + 1] - expected[i];
 282                         double local_relative_error = fabs(absolute_error / delta);
 283                         EXPECT_LT(local_relative_error, local_relative_error_limit);
 284                 }
 285         }
 286         double rms = sqrt(squared_difference) / num_values;
 287         EXPECT_LT(rms, rms_limit);
 288 }
 289
 290 }  // namespace movit