+static void
+bttv_calc_geo (struct bttv * btv,
+ struct bttv_geometry * geo,
+ unsigned int width,
+ unsigned int height,
+ int both_fields,
+ const struct bttv_tvnorm * tvnorm,
+ const struct v4l2_rect * crop)
+{
+ unsigned int c_width;
+ unsigned int c_height;
+ u32 sr;
+
+ if ((crop->left == tvnorm->cropcap.defrect.left
+ && crop->top == tvnorm->cropcap.defrect.top
+ && crop->width == tvnorm->cropcap.defrect.width
+ && crop->height == tvnorm->cropcap.defrect.height
+ && width <= tvnorm->swidth /* see PAL-Nc et al */)
+ || bttv_tvcards[btv->c.type].muxsel[btv->input] < 0) {
+ bttv_calc_geo_old(btv, geo, width, height,
+ both_fields, tvnorm);
+ return;
+ }
+
+ /* For bug compatibility the image size checks permit scale
+ factors > 16. See bttv_crop_calc_limits(). */
+ c_width = min((unsigned int) crop->width, width * 16);
+ c_height = min((unsigned int) crop->height, height * 16);
+
+ geo->width = width;
+ geo->hscale = (c_width * 4096U + (width >> 1)) / width - 4096;
+ /* Even to store Cb first, odd for Cr. */
+ geo->hdelay = ((crop->left * width + c_width) / c_width) & ~1;
+
+ geo->sheight = c_height;
+ geo->vdelay = crop->top - tvnorm->cropcap.bounds.top + MIN_VDELAY;
+ sr = c_height >> !both_fields;
+ sr = (sr * 512U + (height >> 1)) / height - 512;
+ geo->vscale = (0x10000UL - sr) & 0x1fff;
+ geo->vscale |= both_fields ? (BT848_VSCALE_INT << 8) : 0;
+ geo->vtotal = tvnorm->vtotal;
+
+ geo->crop = (((geo->width >> 8) & 0x03) |
+ ((geo->hdelay >> 6) & 0x0c) |
+ ((geo->sheight >> 4) & 0x30) |
+ ((geo->vdelay >> 2) & 0xc0));
+
+ if (btv->opt_combfilter) {
+ geo->vtc = (width < 193) ? 2 : ((width < 385) ? 1 : 0);
+ geo->comb = (width < 769) ? 1 : 0;
+ } else {
+ geo->vtc = 0;
+ geo->comb = 0;
+ }
+}
+