static void apply_delogo(uint8_t *dst, int dst_linesize, uint8_t *src, int src_linesize, int w, int h, AVRational sar, int logo_x, int logo_y, int logo_w, int logo_h, unsigned int band, int show, int direct) { int x, y; uint64_t interp, weightl, weightr, weightt, weightb; uint8_t *xdst, *xsrc; uint8_t *topleft, *botleft, *topright; unsigned int left_sample, right_sample; int xclipl, xclipr, yclipt, yclipb; int logo_x1, logo_x2, logo_y1, logo_y2; xclipl = FFMAX(-logo_x, 0); xclipr = FFMAX(logo_x+logo_w-w, 0); yclipt = FFMAX(-logo_y, 0); yclipb = FFMAX(logo_y+logo_h-h, 0); logo_x1 = logo_x + xclipl; logo_x2 = logo_x + logo_w - xclipr; logo_y1 = logo_y + yclipt; logo_y2 = logo_y + logo_h - yclipb; topleft = src+logo_y1 * src_linesize+logo_x1; topright = src+logo_y1 * src_linesize+logo_x2-1; botleft = src+(logo_y2-1) * src_linesize+logo_x1; if (!direct) av_image_copy_plane(dst, dst_linesize, src, src_linesize, w, h); dst += (logo_y1 + 1) * dst_linesize; src += (logo_y1 + 1) * src_linesize; for (y = logo_y1+1; y < logo_y2-1; y++) { left_sample = topleft[src_linesize*(y-logo_y1)] + topleft[src_linesize*(y-logo_y1-1)] + topleft[src_linesize*(y-logo_y1+1)]; right_sample = topright[src_linesize*(y-logo_y1)] + topright[src_linesize*(y-logo_y1-1)] + topright[src_linesize*(y-logo_y1+1)]; for (x = logo_x1+1, xdst = dst+logo_x1+1, xsrc = src+logo_x1+1; x < logo_x2-1; x++, xdst++, xsrc++) { /* Weighted interpolation based on relative distances, taking SAR into account */ weightl = (uint64_t) (logo_x2-1-x) * (y-logo_y1) * (logo_y2-1-y) * sar.den; weightr = (uint64_t)(x-logo_x1) * (y-logo_y1) * (logo_y2-1-y) * sar.den; weightt = (uint64_t)(x-logo_x1) * (logo_x2-1-x) * (logo_y2-1-y) * sar.num; weightb = (uint64_t)(x-logo_x1) * (logo_x2-1-x) * (y-logo_y1) * sar.num; interp = left_sample * weightl + right_sample * weightr + (topleft[x-logo_x1] + topleft[x-logo_x1-1] + topleft[x-logo_x1+1]) * weightt + (botleft[x-logo_x1] + botleft[x-logo_x1-1] + botleft[x-logo_x1+1]) * weightb; interp /= (weightl + weightr + weightt + weightb) * 3U; if (y >= logo_y+band && y < logo_y+logo_h-band && x >= logo_x+band && x < logo_x+logo_w-band) { *xdst = interp; } else { unsigned dist = 0; if (x < logo_x+band) dist = FFMAX(dist, logo_x-x+band); else if (x >= logo_x+logo_w-band) dist = FFMAX(dist, x-(logo_x+logo_w-1-band)); if (y < logo_y+band) dist = FFMAX(dist, logo_y-y+band); else if (y >= logo_y+logo_h-band) dist = FFMAX(dist, y-(logo_y+logo_h-1-band)); *xdst = (*xsrc*dist + interp*(band-dist))/band; if (show && (dist == band-1)) *xdst = 0; } } dst += dst_linesize; src += src_linesize; } }