DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (409f3966645a)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426
/*
 * Copyright (c) 2018, Alliance for Open Media. All rights reserved
 *
 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
 */

/*!\file
 * \brief This is an sample binary to create noise params from input video.
 *
 * To allow for external denoising applications, this sample binary illustrates
 * how to create a film grain table (film grain params as a function of time)
 * from an input video and its corresponding denoised source.
 *
 * The --output-grain-table file can be passed as input to the encoder (in
 * aomenc this is done through the "--film-grain-table" parameter).
 *
 * As an example, where the input source is an 854x480 yuv420p 8-bit video
 * named "input.854_480.yuv" you would use steps similar to the following:
 *
 * # Run your denoiser (e.g, using hqdn3d filter):
 * ffmpeg -vcodec rawvideo -video_size 854x480 -i input.854_480.yuv \
 *    -vf hqdn3d=5:5:5:5 -vcodec rawvideo -an -f rawvideo \
 *    denoised.854_480.yuv
 *
 * # Model the noise between the denoised version and original source:
 * ./examples/noise_model --fps=25/1 --width=854 --height=480 --i420 \
 *    --input-denoised=denoised.854_480.yuv --input=original.854_480.yuv \
 *    --output-grain-table=film_grain.tbl
 *
 * # Encode with your favorite settings (including the grain table):
 * aomenc --limit=100  --cpu-used=4 --input-bit-depth=8                  \
 *    --i420 -w 854 -h 480 --end-usage=q --cq-level=25 --lag-in-frames=25 \
 *    --auto-alt-ref=2 --bit-depth=8 --film-grain-table=film_grain.tbl \
 *    -o denoised_with_grain_params.ivf denoised.854_480.yuv
 */
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "aom/aom_encoder.h"
#include "aom_dsp/aom_dsp_common.h"

#if CONFIG_AV1_DECODER
#include "aom_dsp/grain_synthesis.h"
#endif

#include "aom_dsp/grain_table.h"
#include "aom_dsp/noise_model.h"
#include "aom_dsp/noise_util.h"
#include "aom_mem/aom_mem.h"
#include "common/args.h"
#include "common/tools_common.h"
#include "common/video_writer.h"

static const char *exec_name;

void usage_exit(void) {
  fprintf(stderr,
          "Usage: %s --input=<input> --input-denoised=<denoised> "
          "--output-grain-table=<outfile> "
          "See comments in noise_model.c for more information.\n",
          exec_name);
  exit(EXIT_FAILURE);
}

static const arg_def_t help =
    ARG_DEF(NULL, "help", 0, "Show usage options and exit");
static const arg_def_t width_arg =
    ARG_DEF("w", "width", 1, "Input width (if rawvideo)");
static const arg_def_t height_arg =
    ARG_DEF("h", "height", 1, "Input height (if rawvideo)");
static const arg_def_t skip_frames_arg =
    ARG_DEF("s", "skip-frames", 1, "Number of frames to skip (default = 1)");
static const arg_def_t fps_arg = ARG_DEF(NULL, "fps", 1, "Frame rate");
static const arg_def_t input_arg = ARG_DEF("-i", "input", 1, "Input filename");
static const arg_def_t output_grain_table_arg =
    ARG_DEF("n", "output-grain-table", 1, "Output noise file");
static const arg_def_t input_denoised_arg =
    ARG_DEF("d", "input-denoised", 1, "Input denoised filename (YUV) only");
static const arg_def_t flat_block_finder_arg =
    ARG_DEF("b", "flat-block-finder", 1, "Run the flat block finder");
static const arg_def_t block_size_arg =
    ARG_DEF("b", "block-size", 1, "Block size");
static const arg_def_t bit_depth_arg =
    ARG_DEF(NULL, "bit-depth", 1, "Bit depth of input");
static const arg_def_t use_i420 =
    ARG_DEF(NULL, "i420", 0, "Input file (and denoised) is I420 (default)");
static const arg_def_t use_i422 =
    ARG_DEF(NULL, "i422", 0, "Input file (and denoised) is I422");
static const arg_def_t use_i444 =
    ARG_DEF(NULL, "i444", 0, "Input file (and denoised) is I444");
static const arg_def_t debug_file_arg =
    ARG_DEF(NULL, "debug-file", 1, "File to output debug info");

typedef struct {
  int width;
  int height;
  struct aom_rational fps;
  const char *input;
  const char *input_denoised;
  const char *output_grain_table;
  int img_fmt;
  int block_size;
  int bit_depth;
  int run_flat_block_finder;
  int force_flat_psd;
  int skip_frames;
  const char *debug_file;
} noise_model_args_t;

void parse_args(noise_model_args_t *noise_args, int *argc, char **argv) {
  struct arg arg;
  static const arg_def_t *main_args[] = { &help,
                                          &input_arg,
                                          &fps_arg,
                                          &width_arg,
                                          &height_arg,
                                          &block_size_arg,
                                          &output_grain_table_arg,
                                          &input_denoised_arg,
                                          &use_i420,
                                          &use_i422,
                                          &use_i444,
                                          &debug_file_arg,
                                          NULL };
  for (int argi = *argc + 1; *argv; argi++, argv++) {
    if (arg_match(&arg, &help, argv)) {
      fprintf(stdout, "\nOptions:\n");
      arg_show_usage(stdout, main_args);
      exit(0);
    } else if (arg_match(&arg, &width_arg, argv)) {
      noise_args->width = atoi(arg.val);
    } else if (arg_match(&arg, &height_arg, argv)) {
      noise_args->height = atoi(arg.val);
    } else if (arg_match(&arg, &input_arg, argv)) {
      noise_args->input = arg.val;
    } else if (arg_match(&arg, &input_denoised_arg, argv)) {
      noise_args->input_denoised = arg.val;
    } else if (arg_match(&arg, &output_grain_table_arg, argv)) {
      noise_args->output_grain_table = arg.val;
    } else if (arg_match(&arg, &block_size_arg, argv)) {
      noise_args->block_size = atoi(arg.val);
    } else if (arg_match(&arg, &bit_depth_arg, argv)) {
      noise_args->bit_depth = atoi(arg.val);
    } else if (arg_match(&arg, &flat_block_finder_arg, argv)) {
      noise_args->run_flat_block_finder = atoi(arg.val);
    } else if (arg_match(&arg, &fps_arg, argv)) {
      noise_args->fps = arg_parse_rational(&arg);
    } else if (arg_match(&arg, &use_i420, argv)) {
      noise_args->img_fmt = AOM_IMG_FMT_I420;
    } else if (arg_match(&arg, &use_i422, argv)) {
      noise_args->img_fmt = AOM_IMG_FMT_I422;
    } else if (arg_match(&arg, &use_i444, argv)) {
      noise_args->img_fmt = AOM_IMG_FMT_I444;
    } else if (arg_match(&arg, &skip_frames_arg, argv)) {
      noise_args->skip_frames = atoi(arg.val);
    } else if (arg_match(&arg, &debug_file_arg, argv)) {
      noise_args->debug_file = arg.val;
    } else {
      fprintf(stdout, "Unknown arg: %s\n\nUsage:\n", *argv);
      arg_show_usage(stdout, main_args);
      exit(0);
    }
  }
  if (noise_args->bit_depth > 8) {
    noise_args->img_fmt |= AOM_IMG_FMT_HIGHBITDEPTH;
  }
}

#if CONFIG_AV1_DECODER
static void print_variance_y(FILE *debug_file, aom_image_t *raw,
                             aom_image_t *denoised, const uint8_t *flat_blocks,
                             int block_size, aom_film_grain_t *grain) {
  aom_image_t renoised;
  grain->apply_grain = 1;
  grain->random_seed = 1071;
  aom_img_alloc(&renoised, raw->fmt, raw->w, raw->h, 1);
  av1_add_film_grain(grain, denoised, &renoised);

  const int num_blocks_w = (raw->w + block_size - 1) / block_size;
  const int num_blocks_h = (raw->h + block_size - 1) / block_size;
  fprintf(debug_file, "x = [");
  for (int by = 0; by < num_blocks_h; by++) {
    for (int bx = 0; bx < num_blocks_w; bx++) {
      double block_mean = 0;
      double noise_std = 0, noise_mean = 0;
      double renoise_std = 0, renoise_mean = 0;
      for (int yi = 0; yi < block_size; ++yi) {
        const int y = by * block_size + yi;
        for (int xi = 0; xi < block_size; ++xi) {
          const int x = bx * block_size + xi;
          const double noise_v = (raw->planes[0][y * raw->stride[0] + x] -
                                  denoised->planes[0][y * raw->stride[0] + x]);
          noise_mean += noise_v;
          noise_std += noise_v * noise_v;

          block_mean += raw->planes[0][y * raw->stride[0] + x];

          const double renoise_v =
              (renoised.planes[0][y * raw->stride[0] + x] -
               denoised->planes[0][y * raw->stride[0] + x]);
          renoise_mean += renoise_v;
          renoise_std += renoise_v * renoise_v;
        }
      }
      int n = (block_size * block_size);
      block_mean /= n;
      noise_mean /= n;
      renoise_mean /= n;
      noise_std = sqrt(noise_std / n - noise_mean * noise_mean);
      renoise_std = sqrt(renoise_std / n - renoise_mean * renoise_mean);
      fprintf(debug_file, "%d %3.2lf %3.2lf %3.2lf  ",
              flat_blocks[by * num_blocks_w + bx], block_mean, noise_std,
              renoise_std);
    }
    fprintf(debug_file, "\n");
  }
  fprintf(debug_file, "];\n");

  if (raw->fmt & AOM_IMG_FMT_HIGHBITDEPTH) {
    fprintf(stderr,
            "Detailed debug info not supported for high bit"
            "depth formats\n");
  } else {
    fprintf(debug_file, "figure(2); clf;\n");
    fprintf(debug_file,
            "scatter(x(:, 2:4:end), x(:, 3:4:end), 'r'); hold on;\n");
    fprintf(debug_file, "scatter(x(:, 2:4:end), x(:, 4:4:end), 'b');\n");
    fprintf(debug_file,
            "plot(linspace(0, 255, length(noise_strength_0)), "
            "noise_strength_0, 'b');\n");
    fprintf(debug_file,
            "title('Scatter plot of intensity vs noise strength');\n");
    fprintf(debug_file,
            "legend('Actual', 'Estimated', 'Estimated strength');\n");
    fprintf(debug_file, "figure(3); clf;\n");
    fprintf(debug_file, "scatter(x(:, 3:4:end), x(:, 4:4:end), 'k');\n");
    fprintf(debug_file, "title('Actual vs Estimated');\n");
    fprintf(debug_file, "pause(3);\n");
  }
  aom_img_free(&renoised);
}
#endif

static void print_debug_info(FILE *debug_file, aom_image_t *raw,
                             aom_image_t *denoised, uint8_t *flat_blocks,
                             int block_size, aom_noise_model_t *noise_model) {
  (void)raw;
  (void)denoised;
  (void)flat_blocks;
  (void)block_size;
  fprintf(debug_file, "figure(3); clf;\n");
  fprintf(debug_file, "figure(2); clf;\n");
  fprintf(debug_file, "figure(1); clf;\n");
  for (int c = 0; c < 3; ++c) {
    fprintf(debug_file, "noise_strength_%d = [\n", c);
    const aom_equation_system_t *eqns =
        &noise_model->combined_state[c].strength_solver.eqns;
    for (int k = 0; k < eqns->n; ++k) {
      fprintf(debug_file, "%lf ", eqns->x[k]);
    }
    fprintf(debug_file, "];\n");
    fprintf(debug_file, "plot(noise_strength_%d); hold on;\n", c);
  }
  fprintf(debug_file, "legend('Y', 'cb', 'cr');\n");
  fprintf(debug_file, "title('Noise strength function');\n");

#if CONFIG_AV1_DECODER
  aom_film_grain_t grain;
  aom_noise_model_get_grain_parameters(noise_model, &grain);
  print_variance_y(debug_file, raw, denoised, flat_blocks, block_size, &grain);
#endif
  fflush(debug_file);
}

int main(int argc, char *argv[]) {
  noise_model_args_t args = { 0,  0, { 25, 1 }, 0, 0, 0,   AOM_IMG_FMT_I420,
                              32, 8, 1,         0, 1, NULL };
  aom_image_t raw, denoised;
  FILE *infile = NULL;
  AvxVideoInfo info;

  memset(&info, 0, sizeof(info));

  exec_name = argv[0];
  parse_args(&args, &argc, argv + 1);

  info.frame_width = args.width;
  info.frame_height = args.height;
  info.time_base.numerator = args.fps.den;
  info.time_base.denominator = args.fps.num;

  if (info.frame_width <= 0 || info.frame_height <= 0 ||
      (info.frame_width % 2) != 0 || (info.frame_height % 2) != 0) {
    die("Invalid frame size: %dx%d", info.frame_width, info.frame_height);
  }
  if (!aom_img_alloc(&raw, args.img_fmt, info.frame_width, info.frame_height,
                     1)) {
    die("Failed to allocate image.");
  }
  if (!aom_img_alloc(&denoised, args.img_fmt, info.frame_width,
                     info.frame_height, 1)) {
    die("Failed to allocate image.");
  }
  infile = fopen(args.input, "r");
  if (!infile) {
    die("Failed to open input file:", args.input);
  }
  fprintf(stderr, "Bit depth: %d  stride:%d\n", args.bit_depth, raw.stride[0]);

  const int high_bd = args.bit_depth > 8;
  const int block_size = args.block_size;
  aom_flat_block_finder_t block_finder;
  aom_flat_block_finder_init(&block_finder, block_size, args.bit_depth,
                             high_bd);

  const int num_blocks_w = (info.frame_width + block_size - 1) / block_size;
  const int num_blocks_h = (info.frame_height + block_size - 1) / block_size;
  uint8_t *flat_blocks = (uint8_t *)aom_malloc(num_blocks_w * num_blocks_h);
  // Sets the random seed on the first entry in the output table
  int16_t random_seed = 1071;
  aom_noise_model_t noise_model;
  aom_noise_model_params_t params = { AOM_NOISE_SHAPE_SQUARE, 3, args.bit_depth,
                                      high_bd };
  aom_noise_model_init(&noise_model, params);

  FILE *denoised_file = 0;
  if (args.input_denoised) {
    denoised_file = fopen(args.input_denoised, "rb");
    if (!denoised_file)
      die("Unable to open input_denoised: %s", args.input_denoised);
  } else {
    die("--input-denoised file must be specified");
  }
  FILE *debug_file = 0;
  if (args.debug_file) {
    debug_file = fopen(args.debug_file, "w");
  }
  aom_film_grain_table_t grain_table = { 0, 0 };

  int64_t prev_timestamp = 0;
  int frame_count = 0;
  while (aom_img_read(&raw, infile)) {
    if (args.input_denoised) {
      if (!aom_img_read(&denoised, denoised_file)) {
        die("Unable to read input denoised file");
      }
    }
    if (frame_count % args.skip_frames == 0) {
      int num_flat_blocks = num_blocks_w * num_blocks_h;
      memset(flat_blocks, 1, num_flat_blocks);
      if (args.run_flat_block_finder) {
        memset(flat_blocks, 0, num_flat_blocks);
        num_flat_blocks = aom_flat_block_finder_run(
            &block_finder, raw.planes[0], info.frame_width, info.frame_height,
            info.frame_width, flat_blocks);
        fprintf(stdout, "Num flat blocks %d\n", num_flat_blocks);
      }

      const uint8_t *planes[3] = { raw.planes[0], raw.planes[1],
                                   raw.planes[2] };
      uint8_t *denoised_planes[3] = { denoised.planes[0], denoised.planes[1],
                                      denoised.planes[2] };
      int strides[3] = { raw.stride[0] >> high_bd, raw.stride[1] >> high_bd,
                         raw.stride[2] >> high_bd };
      int chroma_sub[3] = { raw.x_chroma_shift, raw.y_chroma_shift, 0 };

      fprintf(stdout, "Updating noise model...\n");
      aom_noise_status_t status = aom_noise_model_update(
          &noise_model, (const uint8_t *const *)planes,
          (const uint8_t *const *)denoised_planes, info.frame_width,
          info.frame_height, strides, chroma_sub, flat_blocks, block_size);

      int64_t cur_timestamp =
          frame_count * 10000000ULL * args.fps.den / args.fps.num;
      if (status == AOM_NOISE_STATUS_DIFFERENT_NOISE_TYPE) {
        fprintf(stdout,
                "Noise type is different, updating parameters for time "
                "[ %" PRId64 ", %" PRId64 ")\n",
                prev_timestamp, cur_timestamp);
        aom_film_grain_t grain;
        aom_noise_model_get_grain_parameters(&noise_model, &grain);
        grain.random_seed = random_seed;
        random_seed = 0;
        aom_film_grain_table_append(&grain_table, prev_timestamp, cur_timestamp,
                                    &grain);
        aom_noise_model_save_latest(&noise_model);
        prev_timestamp = cur_timestamp;
      }
      if (debug_file) {
        print_debug_info(debug_file, &raw, &denoised, flat_blocks, block_size,
                         &noise_model);
      }
      fprintf(stdout, "Done noise model update, status = %d\n", status);
    }
    frame_count++;
  }

  aom_film_grain_t grain;
  aom_noise_model_get_grain_parameters(&noise_model, &grain);
  grain.random_seed = random_seed;
  aom_film_grain_table_append(&grain_table, prev_timestamp, INT64_MAX, &grain);
  if (args.output_grain_table) {
    struct aom_internal_error_info error_info;
    if (AOM_CODEC_OK != aom_film_grain_table_write(&grain_table,
                                                   args.output_grain_table,
                                                   &error_info)) {
      die("Unable to write output film grain table");
    }
  }
  aom_film_grain_table_free(&grain_table);

  if (infile) fclose(infile);
  if (denoised_file) fclose(denoised_file);
  if (debug_file) fclose(debug_file);
  aom_img_free(&raw);
  aom_img_free(&denoised);

  return EXIT_SUCCESS;
}