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