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-rw-r--r-- | third_party/aom/examples/noise_model.c | 434 |
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diff --git a/third_party/aom/examples/noise_model.c b/third_party/aom/examples/noise_model.c new file mode 100644 index 0000000000..1de13267fc --- /dev/null +++ b/third_party/aom/examples/noise_model.c @@ -0,0 +1,434 @@ +/* + * 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 "av1/decoder/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; + +static void parse_args(noise_model_args_t *noise_args, 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 (; *argv; 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 = 7391; + grain->bit_depth = raw->bit_depth; + aom_img_alloc(&renoised, raw->fmt, raw->w, raw->h, 1); + + if (av1_add_film_grain(grain, denoised, &renoised)) { + fprintf(stderr, "Internal failure in av1_add_film_grain().\n"); + aom_img_free(&renoised); + return; + } + + 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)); + + (void)argc; + exec_name = argv[0]; + parse_args(&args, 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, "rb"); + if (!infile) { + die("Failed to open input file: %s", 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); + if (!flat_blocks) die("Failed to allocate block data."); + // Sets the random seed on the first entry in the output table + int16_t random_seed = 7391; + 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; +} |