static int do_16x16_motion_search
(
VP9_COMP *cpi,
int_mv *ref_mv,
int_mv *dst_mv,
YV12_BUFFER_CONFIG *buf,
int buf_mb_y_offset,
YV12_BUFFER_CONFIG *ref,
int mb_y_offset
) {
MACROBLOCK *const x = &cpi->mb;
MACROBLOCKD *const xd = &x->e_mbd;
unsigned int err, tmp_err;
int_mv tmp_mv;
int n;
for (n = 0; n < 16; n++) {
BLOCKD *d = &xd->block[n];
BLOCK *b = &x->block[n];
b->base_src = &buf->y_buffer;
b->src_stride = buf->y_stride;
b->src = buf->y_stride * (n & 12) + (n & 3) * 4 + buf_mb_y_offset;
d->base_pre = &ref->y_buffer;
d->pre_stride = ref->y_stride;
d->pre = ref->y_stride * (n & 12) + (n & 3) * 4 + mb_y_offset;
}
// Try zero MV first
// FIXME should really use something like near/nearest MV and/or MV prediction
xd->pre.y_buffer = ref->y_buffer + mb_y_offset;
xd->pre.y_stride = ref->y_stride;
err = vp9_sad16x16(ref->y_buffer + mb_y_offset, ref->y_stride,
xd->dst.y_buffer, xd->dst.y_stride, INT_MAX);
dst_mv->as_int = 0;
// Test last reference frame using the previous best mv as the
// starting point (best reference) for the search
tmp_err = do_16x16_motion_iteration(cpi, ref_mv, &tmp_mv);
if (tmp_err < err) {
err = tmp_err;
dst_mv->as_int = tmp_mv.as_int;
}
// If the current best reference mv is not centred on 0,0 then do a 0,0 based search as well
if (ref_mv->as_int) {
unsigned int tmp_err;
int_mv zero_ref_mv, tmp_mv;
zero_ref_mv.as_int = 0;
tmp_err = do_16x16_motion_iteration(cpi, &zero_ref_mv, &tmp_mv);
if (tmp_err < err) {
dst_mv->as_int = tmp_mv.as_int;
err = tmp_err;
}
}
return err;
}
static int do_16x16_motion_search(VP9_COMP *cpi, const int_mv *ref_mv,
int_mv *dst_mv, int mb_row, int mb_col) {
MACROBLOCK *const x = &cpi->mb;
MACROBLOCKD *const xd = &x->e_mbd;
unsigned int err, tmp_err;
int_mv tmp_mv;
// Try zero MV first
// FIXME should really use something like near/nearest MV and/or MV prediction
err = vp9_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride,
xd->plane[0].pre[0].buf, xd->plane[0].pre[0].stride,
INT_MAX);
dst_mv->as_int = 0;
// Test last reference frame using the previous best mv as the
// starting point (best reference) for the search
tmp_err = do_16x16_motion_iteration(cpi, &ref_mv->as_mv, &tmp_mv.as_mv,
mb_row, mb_col);
if (tmp_err < err) {
err = tmp_err;
dst_mv->as_int = tmp_mv.as_int;
}
// If the current best reference mv is not centered on 0,0 then do a 0,0
// based search as well.
if (ref_mv->as_int) {
unsigned int tmp_err;
int_mv zero_ref_mv, tmp_mv;
zero_ref_mv.as_int = 0;
tmp_err = do_16x16_motion_iteration(cpi, &zero_ref_mv.as_mv, &tmp_mv.as_mv,
mb_row, mb_col);
if (tmp_err < err) {
dst_mv->as_int = tmp_mv.as_int;
err = tmp_err;
}
}
return err;
}
