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/*
* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "block.h"
#include "variance.h"
#if CONFIG_ROTATION
int vp8_find_best_rotation(MACROBLOCK *x, BLOCK *b, BLOCKD *d, int_mv *bestmv,
int_mv *ref_mv, int *bri, int error_per_bit,
const vp8_variance_fn_ptr_t *vfp, int *mvcost[2],
int *distortion, unsigned int *sse1) {
unsigned char *z = (*(b->base_src) + b->src);
int ri;
int y_stride;
unsigned int besterr;
int br = bestmv->as_mv.row;
int bc = bestmv->as_mv.col;
unsigned char *y = *(d->base_pre) + d->pre + br * d->pre_stride + bc;
y_stride = d->pre_stride;
// calculate central point error
besterr = vfp->vf(y, y_stride, z, b->src_stride, sse1);
*distortion = besterr;
// find the best matching rotation
*bri = 5;
for (ri = 0; ri < ROTATIONS; ri++) {
unsigned int this_err;
unsigned char pb[256];
predict_rotated_16x16(ri, y, y_stride, pb, 16);
this_err = vfp->vf(pb, 16, z, b->src_stride, sse1);
if (this_err < besterr) {
*bri = ri;
besterr = this_err;
}
}
*sse1 = besterr;
*distortion = besterr;
return 0;
}
#endif
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