270 lines
8.3 KiB
C
270 lines
8.3 KiB
C
/*
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* Copyright (c) 2010 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 "./vp9_rtcd.h"
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#include "vpx_ports/mem.h"
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#include "vpx/vpx_integer.h"
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#include "vp9/common/vp9_common.h"
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#include "vp9/common/vp9_filter.h"
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#include "vp9/encoder/vp9_variance.h"
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void variance(const uint8_t *a, int a_stride,
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const uint8_t *b, int b_stride,
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int w, int h, unsigned int *sse, int *sum) {
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int i, j;
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*sum = 0;
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*sse = 0;
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for (i = 0; i < h; i++) {
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for (j = 0; j < w; j++) {
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const int diff = a[j] - b[j];
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*sum += diff;
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*sse += diff * diff;
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}
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a += a_stride;
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b += b_stride;
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}
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}
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// Applies a 1-D 2-tap bi-linear filter to the source block in either horizontal
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// or vertical direction to produce the filtered output block. Used to implement
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// first-pass of 2-D separable filter.
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//
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// Produces int32_t output to retain precision for next pass. Two filter taps
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// should sum to VP9_FILTER_WEIGHT. pixel_step defines whether the filter is
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// applied horizontally (pixel_step=1) or vertically (pixel_step=stride). It
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// defines the offset required to move from one input to the next.
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static void var_filter_block2d_bil_first_pass(const uint8_t *src_ptr,
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uint16_t *output_ptr,
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unsigned int src_pixels_per_line,
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int pixel_step,
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unsigned int output_height,
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unsigned int output_width,
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const int16_t *vp9_filter) {
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unsigned int i, j;
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for (i = 0; i < output_height; i++) {
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for (j = 0; j < output_width; j++) {
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output_ptr[j] = ROUND_POWER_OF_TWO((int)src_ptr[0] * vp9_filter[0] +
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(int)src_ptr[pixel_step] * vp9_filter[1],
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FILTER_BITS);
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src_ptr++;
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}
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// Next row...
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src_ptr += src_pixels_per_line - output_width;
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output_ptr += output_width;
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}
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}
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// Applies a 1-D 2-tap bi-linear filter to the source block in either horizontal
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// or vertical direction to produce the filtered output block. Used to implement
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// second-pass of 2-D separable filter.
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//
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// Requires 32-bit input as produced by filter_block2d_bil_first_pass. Two
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// filter taps should sum to VP9_FILTER_WEIGHT. pixel_step defines whether the
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// filter is applied horizontally (pixel_step=1) or vertically (pixel_step=
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// stride). It defines the offset required to move from one input to the next.
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static void var_filter_block2d_bil_second_pass(const uint16_t *src_ptr,
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uint8_t *output_ptr,
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unsigned int src_pixels_per_line,
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unsigned int pixel_step,
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unsigned int output_height,
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unsigned int output_width,
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const int16_t *vp9_filter) {
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unsigned int i, j;
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for (i = 0; i < output_height; i++) {
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for (j = 0; j < output_width; j++) {
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output_ptr[j] = ROUND_POWER_OF_TWO((int)src_ptr[0] * vp9_filter[0] +
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(int)src_ptr[pixel_step] * vp9_filter[1],
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FILTER_BITS);
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src_ptr++;
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}
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src_ptr += src_pixels_per_line - output_width;
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output_ptr += output_width;
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}
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}
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unsigned int vp9_get_mb_ss_c(const int16_t *src_ptr) {
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unsigned int i, sum = 0;
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for (i = 0; i < 256; i++)
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sum += src_ptr[i] * src_ptr[i];
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return sum;
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}
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#define VAR(W, H) \
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unsigned int vp9_variance##W##x##H##_c(const uint8_t *a, int a_stride, \
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const uint8_t *b, int b_stride, \
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unsigned int *sse) { \
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int sum; \
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variance(a, a_stride, b, b_stride, W, H, sse, &sum); \
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return *sse - (((int64_t)sum * sum) / (W * H)); \
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}
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#define SUBPIX_VAR(W, H) \
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unsigned int vp9_sub_pixel_variance##W##x##H##_c( \
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const uint8_t *src, int src_stride, \
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int xoffset, int yoffset, \
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const uint8_t *dst, int dst_stride, \
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unsigned int *sse) { \
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uint16_t fdata3[(H + 1) * W]; \
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uint8_t temp2[H * W]; \
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\
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var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, W, \
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BILINEAR_FILTERS_2TAP(xoffset)); \
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var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \
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BILINEAR_FILTERS_2TAP(yoffset)); \
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\
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return vp9_variance##W##x##H##_c(temp2, W, dst, dst_stride, sse); \
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}
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#define SUBPIX_AVG_VAR(W, H) \
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unsigned int vp9_sub_pixel_avg_variance##W##x##H##_c( \
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const uint8_t *src, int src_stride, \
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int xoffset, int yoffset, \
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const uint8_t *dst, int dst_stride, \
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unsigned int *sse, \
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const uint8_t *second_pred) { \
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uint16_t fdata3[(H + 1) * W]; \
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uint8_t temp2[H * W]; \
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DECLARE_ALIGNED_ARRAY(16, uint8_t, temp3, H * W); \
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\
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var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, W, \
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BILINEAR_FILTERS_2TAP(xoffset)); \
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var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \
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BILINEAR_FILTERS_2TAP(yoffset)); \
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\
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vp9_comp_avg_pred(temp3, second_pred, W, H, temp2, W); \
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\
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return vp9_variance##W##x##H##_c(temp3, W, dst, dst_stride, sse); \
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}
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void vp9_get_sse_sum_16x16_c(const uint8_t *src_ptr, int source_stride,
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const uint8_t *ref_ptr, int ref_stride,
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unsigned int *sse, int *sum) {
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variance(src_ptr, source_stride, ref_ptr, ref_stride, 16, 16, sse, sum);
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}
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void vp9_get_sse_sum_8x8_c(const uint8_t *src_ptr, int source_stride,
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const uint8_t *ref_ptr, int ref_stride,
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unsigned int *sse, int *sum) {
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variance(src_ptr, source_stride, ref_ptr, ref_stride, 8, 8, sse, sum);
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}
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unsigned int vp9_mse16x16_c(const uint8_t *src, int src_stride,
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const uint8_t *ref, int ref_stride,
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unsigned int *sse) {
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int sum;
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variance(src, src_stride, ref, ref_stride, 16, 16, sse, &sum);
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return *sse;
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}
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unsigned int vp9_mse16x8_c(const uint8_t *src, int src_stride,
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const uint8_t *ref, int ref_stride,
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unsigned int *sse) {
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int sum;
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variance(src, src_stride, ref, ref_stride, 16, 8, sse, &sum);
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return *sse;
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}
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unsigned int vp9_mse8x16_c(const uint8_t *src, int src_stride,
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const uint8_t *ref, int ref_stride,
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unsigned int *sse) {
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int sum;
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variance(src, src_stride, ref, ref_stride, 8, 16, sse, &sum);
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return *sse;
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}
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unsigned int vp9_mse8x8_c(const uint8_t *src, int src_stride,
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const uint8_t *ref, int ref_stride,
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unsigned int *sse) {
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int sum;
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variance(src, src_stride, ref, ref_stride, 8, 8, sse, &sum);
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return *sse;
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}
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VAR(4, 4)
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SUBPIX_VAR(4, 4)
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SUBPIX_AVG_VAR(4, 4)
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VAR(4, 8)
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SUBPIX_VAR(4, 8)
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SUBPIX_AVG_VAR(4, 8)
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VAR(8, 4)
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SUBPIX_VAR(8, 4)
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SUBPIX_AVG_VAR(8, 4)
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VAR(8, 8)
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SUBPIX_VAR(8, 8)
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SUBPIX_AVG_VAR(8, 8)
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VAR(8, 16)
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SUBPIX_VAR(8, 16)
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SUBPIX_AVG_VAR(8, 16)
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VAR(16, 8)
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SUBPIX_VAR(16, 8)
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SUBPIX_AVG_VAR(16, 8)
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VAR(16, 16)
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SUBPIX_VAR(16, 16)
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SUBPIX_AVG_VAR(16, 16)
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VAR(16, 32)
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SUBPIX_VAR(16, 32)
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SUBPIX_AVG_VAR(16, 32)
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VAR(32, 16)
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SUBPIX_VAR(32, 16)
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SUBPIX_AVG_VAR(32, 16)
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VAR(32, 32)
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SUBPIX_VAR(32, 32)
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SUBPIX_AVG_VAR(32, 32)
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VAR(32, 64)
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SUBPIX_VAR(32, 64)
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SUBPIX_AVG_VAR(32, 64)
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VAR(64, 32)
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SUBPIX_VAR(64, 32)
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SUBPIX_AVG_VAR(64, 32)
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VAR(64, 64)
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SUBPIX_VAR(64, 64)
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SUBPIX_AVG_VAR(64, 64)
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void vp9_comp_avg_pred(uint8_t *comp_pred, const uint8_t *pred, int width,
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int height, const uint8_t *ref, int ref_stride) {
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int i, j;
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for (i = 0; i < height; i++) {
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for (j = 0; j < width; j++) {
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const int tmp = pred[j] + ref[j];
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comp_pred[j] = ROUND_POWER_OF_TWO(tmp, 1);
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}
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comp_pred += width;
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pred += width;
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ref += ref_stride;
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}
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}
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