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()),
  51           width(width),
  52           height(height),
  53           framebuffer_format(framebuffer_format),
  54           output_added(false),
  55           finalized(false)
  56 {
  57         CHECK(init_movit(".", MOVIT_DEBUG_OFF));
  58
  59         if (data != NULL) {
  60                 add_input(data, pixel_format, color_space, gamma_curve);
  61         }
  62 }
  63
  64 EffectChainTester::~EffectChainTester()
  65 {
  66 }
  67
  68 Input *EffectChainTester::add_input(const float *data, MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve, int input_width, int input_height)
  69 {
  70         ImageFormat format;
  71         format.color_space = color_space;
  72         format.gamma_curve = gamma_curve;
  73
  74         if (input_width == -1) {
  75                 input_width = width;
  76         }
  77         if (input_height == -1) {
  78                 input_height = height;
  79         }
  80
  81         FlatInput *input = new FlatInput(format, pixel_format, GL_FLOAT, input_width, input_height);
  82         input->set_pixel_data(data);
  83         chain.add_input(input);
  84         return input;
  85 }
  86
  87 Input *EffectChainTester::add_input(const unsigned char *data, MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve, int input_width, int input_height)
  88 {
  89         ImageFormat format;
  90         format.color_space = color_space;
  91         format.gamma_curve = gamma_curve;
  92
  93         if (input_width == -1) {
  94                 input_width = width;
  95         }
  96         if (input_height == -1) {
  97                 input_height = height;
  98         }
  99
 100         FlatInput *input = new FlatInput(format, pixel_format, GL_UNSIGNED_BYTE, input_width, input_height);
 101         input->set_pixel_data(data);
 102         chain.add_input(input);
 103         return input;
 104 }
 105
 106 void EffectChainTester::run(float *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 107 {
 108         internal_run<float>(out_data, NULL, NULL, GL_FLOAT, format, color_space, gamma_curve, alpha_format);
 109 }
 110
 111 void EffectChainTester::run(float *out_data, float *out_data2, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 112 {
 113         internal_run<float>(out_data, out_data2, NULL, GL_FLOAT, format, color_space, gamma_curve, alpha_format);
 114 }
 115
 116 void EffectChainTester::run(float *out_data, float *out_data2, float *out_data3, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 117 {
 118         internal_run(out_data, out_data2, out_data3, GL_FLOAT, format, color_space, gamma_curve, alpha_format);
 119 }
 120
 121 void EffectChainTester::run(unsigned char *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 122 {
 123         internal_run<unsigned char>(out_data, NULL, NULL, GL_UNSIGNED_BYTE, format, color_space, gamma_curve, alpha_format);
 124 }
 125
 126 void EffectChainTester::run(unsigned char *out_data, unsigned char *out_data2, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 127 {
 128         internal_run<unsigned char>(out_data, out_data2, NULL, GL_UNSIGNED_BYTE, format, color_space, gamma_curve, alpha_format);
 129 }
 130
 131 void EffectChainTester::run(unsigned char *out_data, unsigned char *out_data2, unsigned char *out_data3, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 132 {
 133         internal_run(out_data, out_data2, out_data3, GL_UNSIGNED_BYTE, format, color_space, gamma_curve, alpha_format);
 134 }
 135
 136 template<class T>
 137 void EffectChainTester::internal_run(T *out_data, T *out_data2, T *out_data3, GLenum internal_format, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 138 {
 139         if (!finalized) {
 140                 finalize_chain(color_space, gamma_curve, alpha_format);
 141         }
 142
 143         GLuint type;
 144         if (framebuffer_format == GL_RGBA8) {
 145                 type = GL_UNSIGNED_BYTE;
 146         } else if (framebuffer_format == GL_RGBA16F || framebuffer_format == GL_RGBA32F) {
 147                 type = GL_FLOAT;
 148         } else {
 149                 // Add more here as needed.
 150                 assert(false);
 151         }
 152
 153         unsigned num_outputs;
 154         if (out_data3 != NULL) {
 155                 num_outputs = 3;
 156         } else if (out_data2 != NULL) {
 157                 num_outputs = 2;
 158         } else {
 159                 num_outputs = 1;
 160         }
 161
 162         GLuint fbo, texnum[3];
 163
 164         glGenTextures(num_outputs, texnum);
 165         check_error();
 166         for (unsigned i = 0; i < num_outputs; ++i) {
 167                 glBindTexture(GL_TEXTURE_2D, texnum[i]);
 168                 check_error();
 169                 glTexImage2D(GL_TEXTURE_2D, 0, framebuffer_format, width, height, 0, GL_RGBA, type, NULL);
 170                 check_error();
 171         }
 172
 173         glGenFramebuffers(1, &fbo);
 174         check_error();
 175         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 176         check_error();
 177         for (unsigned i = 0; i < num_outputs; ++i) {
 178                 glFramebufferTexture2D(
 179                         GL_FRAMEBUFFER,
 180                         GL_COLOR_ATTACHMENT0 + i,
 181                         GL_TEXTURE_2D,
 182                         texnum[i],
 183                         0);
 184                 check_error();
 185         }
 186
 187         GLenum bufs[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2 };
 188         glDrawBuffers(num_outputs, bufs);
 189
 190         chain.render_to_fbo(fbo, width, height);
 191
 192         T *data[3] = { out_data, out_data2, out_data3 };
 193
 194         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 195         check_error();
 196         for (unsigned i = 0; i < num_outputs; ++i) {
 197                 T *ptr = data[i];
 198                 glReadBuffer(GL_COLOR_ATTACHMENT0 + i);
 199                 if (!epoxy_is_desktop_gl() && (format == GL_RED || format == GL_BLUE || format == GL_ALPHA)) {
 200                         // GLES will only read GL_RGBA.
 201                         T *temp = new T[width * height * 4];
 202                         glReadPixels(0, 0, width, height, GL_RGBA, internal_format, temp);
 203                         check_error();
 204                         if (format == GL_ALPHA) {
 205                                 for (unsigned i = 0; i < width * height; ++i) {
 206                                         ptr[i] = temp[i * 4 + 3];
 207                                 }
 208                         } else if (format == GL_BLUE) {
 209                                 for (unsigned i = 0; i < width * height; ++i) {
 210                                         ptr[i] = temp[i * 4 + 2];
 211                                 }
 212                         } else {
 213                                 for (unsigned i = 0; i < width * height; ++i) {
 214                                         ptr[i] = temp[i * 4];
 215                                 }
 216                         }
 217                         delete[] temp;
 218                 } else {
 219                         glReadPixels(0, 0, width, height, format, internal_format, ptr);
 220                         check_error();
 221                 }
 222
 223                 if (format == GL_RGBA) {
 224                         vertical_flip(ptr, width * 4, height);
 225                 } else {
 226                         vertical_flip(ptr, width, height);
 227                 }
 228         }
 229
 230         glDeleteFramebuffers(1, &fbo);
 231         check_error();
 232         glDeleteTextures(num_outputs, texnum);
 233         check_error();
 234 }
 235
 236 void EffectChainTester::add_output(const ImageFormat &format, OutputAlphaFormat alpha_format)
 237 {
 238         chain.add_output(format, alpha_format);
 239         output_added = true;
 240 }
 241
 242 void EffectChainTester::add_ycbcr_output(const ImageFormat &format, OutputAlphaFormat alpha_format, const YCbCrFormat &ycbcr_format, YCbCrOutputSplitting output_splitting)
 243 {
 244         chain.add_ycbcr_output(format, alpha_format, ycbcr_format, output_splitting);
 245         output_added = true;
 246 }
 247
 248 void EffectChainTester::finalize_chain(Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 249 {
 250         assert(!finalized);
 251         if (!output_added) {
 252                 ImageFormat image_format;
 253                 image_format.color_space = color_space;
 254                 image_format.gamma_curve = gamma_curve;
 255                 chain.add_output(image_format, alpha_format);
 256                 output_added = true;
 257         }
 258         chain.finalize();
 259         finalized = true;
 260 }
 261
 262 void expect_equal(const float *ref, const float *result, unsigned width, unsigned height, float largest_difference_limit, float rms_limit)
 263 {
 264         float largest_difference = -1.0f;
 265         float squared_difference = 0.0f;
 266         int largest_diff_x = -1, largest_diff_y = -1;
 267
 268         for (unsigned y = 0; y < height; ++y) {
 269                 for (unsigned x = 0; x < width; ++x) {
 270                         float diff = ref[y * width + x] - result[y * width + x];
 271                         if (fabs(diff) > largest_difference) {
 272                                 largest_difference = fabs(diff);
 273                                 largest_diff_x = x;
 274                                 largest_diff_y = y;
 275                         }
 276                         squared_difference += diff * diff;
 277                 }
 278         }
 279
 280         EXPECT_LT(largest_difference, largest_difference_limit)
 281                 << "Largest difference is in x=" << largest_diff_x << ", y=" << largest_diff_y << ":\n"
 282                 << "Reference: " << ref[largest_diff_y * width + largest_diff_x] << "\n"
 283                 << "Result:    " << result[largest_diff_y * width + largest_diff_x];
 284
 285         float rms = sqrt(squared_difference) / (width * height);
 286         EXPECT_LT(rms, rms_limit);
 287
 288         if (largest_difference >= largest_difference_limit || rms >= rms_limit) {
 289                 fprintf(stderr, "Dumping matrices for easier debugging, since at least one test failed.\n");
 290
 291                 fprintf(stderr, "Reference:\n");
 292                 for (unsigned y = 0; y < height; ++y) {
 293                         for (unsigned x = 0; x < width; ++x) {
 294                                 fprintf(stderr, "%7.4f ", ref[y * width + x]);
 295                         }
 296                         fprintf(stderr, "\n");
 297                 }
 298
 299                 fprintf(stderr, "\nResult:\n");
 300                 for (unsigned y = 0; y < height; ++y) {
 301                         for (unsigned x = 0; x < width; ++x) {
 302                                 fprintf(stderr, "%7.4f ", result[y * width + x]);
 303                         }
 304                         fprintf(stderr, "\n");
 305                 }
 306         }
 307 }
 308
 309 void expect_equal(const unsigned char *ref, const unsigned char *result, unsigned width, unsigned height, unsigned largest_difference_limit, float rms_limit)
 310 {
 311         assert(width > 0);
 312         assert(height > 0);
 313
 314         float *ref_float = new float[width * height];
 315         float *result_float = new float[width * height];
 316
 317         for (unsigned y = 0; y < height; ++y) {
 318                 for (unsigned x = 0; x < width; ++x) {
 319                         ref_float[y * width + x] = ref[y * width + x];
 320                         result_float[y * width + x] = result[y * width + x];
 321                 }
 322         }
 323
 324         expect_equal(ref_float, result_float, width, height, largest_difference_limit, rms_limit);
 325
 326         delete[] ref_float;
 327         delete[] result_float;
 328 }
 329
 330 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)
 331 {
 332         double squared_difference = 0.0;
 333         for (unsigned i = 0; i < num_values; ++i) {
 334                 double absolute_error = fabs(expected[i] - result[i]);
 335                 squared_difference += absolute_error * absolute_error;
 336                 EXPECT_LT(absolute_error, absolute_error_limit);
 337
 338                 if (expected[i] > 0.0) {
 339                         double relative_error = fabs(absolute_error / expected[i]);
 340
 341                         EXPECT_LT(relative_error, relative_error_limit);
 342                 }
 343                 if (i < num_values - 1) {
 344                         double delta = expected[i + 1] - expected[i];
 345                         double local_relative_error = fabs(absolute_error / delta);
 346                         EXPECT_LT(local_relative_error, local_relative_error_limit);
 347                 }
 348         }
 349         double rms = sqrt(squared_difference) / num_values;
 350         EXPECT_LT(rms, rms_limit);
 351 }
 352
 353 double srgb_to_linear(double x)
 354 {
 355         // From the Wikipedia article on sRGB.
 356         if (x < 0.04045) {
 357                 return x / 12.92;
 358         } else {
 359                 return pow((x + 0.055) / 1.055, 2.4);
 360         }
 361 }
 362
 363 double linear_to_srgb(double x)
 364 {
 365         // From the Wikipedia article on sRGB.
 366         if (x < 0.0031308) {
 367                 return 12.92 * x;
 368         } else {
 369                 return 1.055 * pow(x, 1.0 / 2.4) - 0.055;
 370         }
 371 }
 372
 373 }  // namespace movit