samples/risp4ml/isp_stages/blc.c

#include "samples/risp4ml/common/utils.h"
#include "samples/risp4ml/isp_stages/blc.h"

static BlcParams blc_params = {.enable = true,
                               .offsets = {2048, 2048, 2048, 2048}};

void set_blc_params(BlcParams* params) { blc_params = *params; }

void blc_process(Image* img) {
  if (!blc_params.enable) return;

  for (uint16_t y = 0; y < img->height; ++y) {
    pixel_type_t* line = image_row(img, 0, y);
    for (uint16_t x = 0; x < img->width; ++x) {
      BayerIndex bayer_index = GetBayerIndex(kBayerType, x, y);
      line[x] = SubUnsignedZeroClamp(line[x], blc_params.offsets[bayer_index]);
    }
  }
}