Lines Matching defs:y_start
442 int y_start = MACROBLOCK_VPOS(mb_y);
445 y_start -= extra_y_rows;
462 if (dec->alpha_data_ != NULL && y_start < y_end) {
465 io->a = VP8DecompressAlphaRows(dec, y_start, y_end - y_start);
471 if (y_start < io->crop_top) {
472 const int delta_y = io->crop_top - y_start;
473 y_start = io->crop_top;
482 if (y_start < y_end) {
489 io->mb_y = y_start - io->crop_top;
491 io->mb_h = y_end - y_start;