ref: c7780075ec0e87f74a1a5706dec914aad8dc9200
dir: /vpx_dsp/variance.c/
/* * Copyright (c) 2010 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 "./vpx_config.h" #include "./vpx_dsp_rtcd.h" #include "vpx_ports/mem.h" #include "vpx/vpx_integer.h" #include "vpx_dsp/variance.h" static const uint8_t bilinear_filters[8][2] = { { 128, 0 }, { 112, 16 }, { 96, 32 }, { 80, 48 }, { 64, 64 }, { 48, 80 }, { 32, 96 }, { 16, 112 }, }; uint32_t vpx_get4x4sse_cs_c(const uint8_t *a, int a_stride, const uint8_t *b, int b_stride) { int distortion = 0; int r, c; for (r = 0; r < 4; ++r) { for (c = 0; c < 4; ++c) { int diff = a[c] - b[c]; distortion += diff * diff; } a += a_stride; b += b_stride; } return distortion; } uint32_t vpx_get_mb_ss_c(const int16_t *a) { unsigned int i, sum = 0; for (i = 0; i < 256; ++i) { sum += a[i] * a[i]; } return sum; } uint32_t vpx_variance_halfpixvar16x16_h_c(const uint8_t *a, int a_stride, const uint8_t *b, int b_stride, uint32_t *sse) { return vpx_sub_pixel_variance16x16_c(a, a_stride, 4, 0, b, b_stride, sse); } uint32_t vpx_variance_halfpixvar16x16_v_c(const uint8_t *a, int a_stride, const uint8_t *b, int b_stride, uint32_t *sse) { return vpx_sub_pixel_variance16x16_c(a, a_stride, 0, 4, b, b_stride, sse); } uint32_t vpx_variance_halfpixvar16x16_hv_c(const uint8_t *a, int a_stride, const uint8_t *b, int b_stride, uint32_t *sse) { return vpx_sub_pixel_variance16x16_c(a, a_stride, 4, 4, b, b_stride, sse); } static void variance(const uint8_t *a, int a_stride, const uint8_t *b, int b_stride, int w, int h, uint32_t *sse, int *sum) { int i, j; *sum = 0; *sse = 0; for (i = 0; i < h; ++i) { for (j = 0; j < w; ++j) { const int diff = a[j] - b[j]; *sum += diff; *sse += diff * diff; } a += a_stride; b += b_stride; } } // Applies a 1-D 2-tap bilinear filter to the source block in either horizontal // or vertical direction to produce the filtered output block. Used to implement // the first-pass of 2-D separable filter. // // Produces int16_t output to retain precision for the next pass. Two filter // taps should sum to FILTER_WEIGHT. pixel_step defines whether the filter is // applied horizontally (pixel_step = 1) or vertically (pixel_step = stride). // It defines the offset required to move from one input to the next. static void var_filter_block2d_bil_first_pass(const uint8_t *a, uint16_t *b, unsigned int src_pixels_per_line, int pixel_step, unsigned int output_height, unsigned int output_width, const uint8_t *filter) { unsigned int i, j; for (i = 0; i < output_height; ++i) { for (j = 0; j < output_width; ++j) { b[j] = ROUND_POWER_OF_TWO((int)a[0] * filter[0] + (int)a[pixel_step] * filter[1], FILTER_BITS); ++a; } a += src_pixels_per_line - output_width; b += output_width; } } // Applies a 1-D 2-tap bilinear filter to the source block in either horizontal // or vertical direction to produce the filtered output block. Used to implement // the second-pass of 2-D separable filter. // // Requires 16-bit input as produced by filter_block2d_bil_first_pass. Two // filter taps should sum to FILTER_WEIGHT. pixel_step defines whether the // filter is applied horizontally (pixel_step = 1) or vertically // (pixel_step = stride). It defines the offset required to move from one input // to the next. Output is 8-bit. static void var_filter_block2d_bil_second_pass(const uint16_t *a, uint8_t *b, unsigned int src_pixels_per_line, unsigned int pixel_step, unsigned int output_height, unsigned int output_width, const uint8_t *filter) { unsigned int i, j; for (i = 0; i < output_height; ++i) { for (j = 0; j < output_width; ++j) { b[j] = ROUND_POWER_OF_TWO((int)a[0] * filter[0] + (int)a[pixel_step] * filter[1], FILTER_BITS); ++a; } a += src_pixels_per_line - output_width; b += output_width; } } #define VAR(W, H) \ uint32_t vpx_variance##W##x##H##_c(const uint8_t *a, int a_stride, \ const uint8_t *b, int b_stride, \ uint32_t *sse) { \ int sum; \ variance(a, a_stride, b, b_stride, W, H, sse, &sum); \ return *sse - (((int64_t)sum * sum) / (W * H)); \ } #define SUBPIX_VAR(W, H) \ uint32_t vpx_sub_pixel_variance##W##x##H##_c(const uint8_t *a, int a_stride, \ int xoffset, int yoffset, \ const uint8_t *b, int b_stride, \ uint32_t *sse) { \ uint16_t fdata3[(H + 1) * W]; \ uint8_t temp2[H * W]; \ \ var_filter_block2d_bil_first_pass(a, fdata3, a_stride, 1, H + 1, W, \ bilinear_filters[xoffset]); \ var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \ bilinear_filters[yoffset]); \ \ return vpx_variance##W##x##H##_c(temp2, W, b, b_stride, sse); \ } #define SUBPIX_AVG_VAR(W, H) \ uint32_t vpx_sub_pixel_avg_variance##W##x##H##_c(const uint8_t *a, \ int a_stride, \ int xoffset, int yoffset, \ const uint8_t *b, \ int b_stride, \ uint32_t *sse, \ const uint8_t *second_pred) { \ uint16_t fdata3[(H + 1) * W]; \ uint8_t temp2[H * W]; \ DECLARE_ALIGNED(16, uint8_t, temp3[H * W]); \ \ var_filter_block2d_bil_first_pass(a, fdata3, a_stride, 1, H + 1, W, \ bilinear_filters[xoffset]); \ var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \ bilinear_filters[yoffset]); \ \ vpx_comp_avg_pred(temp3, second_pred, W, H, temp2, W); \ \ return vpx_variance##W##x##H##_c(temp3, W, b, b_stride, sse); \ } /* Identical to the variance call except it takes an additional parameter, sum, * and returns that value using pass-by-reference instead of returning * sse - sum^2 / w*h */ #define GET_VAR(W, H) \ void vpx_get##W##x##H##var_c(const uint8_t *a, int a_stride, \ const uint8_t *b, int b_stride, \ uint32_t *sse, int *sum) { \ variance(a, a_stride, b, b_stride, W, H, sse, sum); \ } /* Identical to the variance call except it does not calculate the * sse - sum^2 / w*h and returns sse in addtion to modifying the passed in * variable. */ #define MSE(W, H) \ uint32_t vpx_mse##W##x##H##_c(const uint8_t *a, int a_stride, \ const uint8_t *b, int b_stride, \ uint32_t *sse) { \ int sum; \ variance(a, a_stride, b, b_stride, W, H, sse, &sum); \ return *sse; \ } /* All three forms of the variance are available in the same sizes. */ #define VARIANCES(W, H) \ VAR(W, H) \ SUBPIX_VAR(W, H) \ SUBPIX_AVG_VAR(W, H) VARIANCES(64, 64) VARIANCES(64, 32) VARIANCES(32, 64) VARIANCES(32, 32) VARIANCES(32, 16) VARIANCES(16, 32) VARIANCES(16, 16) VARIANCES(16, 8) VARIANCES(8, 16) VARIANCES(8, 8) VARIANCES(8, 4) VARIANCES(4, 8) VARIANCES(4, 4) GET_VAR(16, 16) GET_VAR(8, 8) MSE(16, 16) MSE(16, 8) MSE(8, 16) MSE(8, 8) void vpx_comp_avg_pred_c(uint8_t *comp_pred, const uint8_t *pred, int width, int height, const uint8_t *ref, int ref_stride) { int i, j; for (i = 0; i < height; ++i) { for (j = 0; j < width; ++j) { const int tmp = pred[j] + ref[j]; comp_pred[j] = ROUND_POWER_OF_TWO(tmp, 1); } comp_pred += width; pred += width; ref += ref_stride; } } #if CONFIG_VP9_HIGHBITDEPTH static void highbd_variance64(const uint8_t *a8, int a_stride, const uint8_t *b8, int b_stride, int w, int h, uint64_t *sse, uint64_t *sum) { int i, j; uint16_t *a = CONVERT_TO_SHORTPTR(a8); uint16_t *b = CONVERT_TO_SHORTPTR(b8); *sum = 0; *sse = 0; for (i = 0; i < h; ++i) { for (j = 0; j < w; ++j) { const int diff = a[j] - b[j]; *sum += diff; *sse += diff * diff; } a += a_stride; b += b_stride; } } static void highbd_8_variance(const uint8_t *a8, int a_stride, const uint8_t *b8, int b_stride, int w, int h, uint32_t *sse, int *sum) { uint64_t sse_long = 0; uint64_t sum_long = 0; highbd_variance64(a8, a_stride, b8, b_stride, w, h, &sse_long, &sum_long); *sse = (uint32_t)sse_long; *sum = (int)sum_long; } static void highbd_10_variance(const uint8_t *a8, int a_stride, const uint8_t *b8, int b_stride, int w, int h, uint32_t *sse, int *sum) { uint64_t sse_long = 0; uint64_t sum_long = 0; highbd_variance64(a8, a_stride, b8, b_stride, w, h, &sse_long, &sum_long); *sse = (uint32_t)ROUND_POWER_OF_TWO(sse_long, 4); *sum = (int)ROUND_POWER_OF_TWO(sum_long, 2); } static void highbd_12_variance(const uint8_t *a8, int a_stride, const uint8_t *b8, int b_stride, int w, int h, uint32_t *sse, int *sum) { uint64_t sse_long = 0; uint64_t sum_long = 0; highbd_variance64(a8, a_stride, b8, b_stride, w, h, &sse_long, &sum_long); *sse = (uint32_t)ROUND_POWER_OF_TWO(sse_long, 8); *sum = (int)ROUND_POWER_OF_TWO(sum_long, 4); } #define HIGHBD_VAR(W, H) \ uint32_t vpx_highbd_8_variance##W##x##H##_c(const uint8_t *a, \ int a_stride, \ const uint8_t *b, \ int b_stride, \ uint32_t *sse) { \ int sum; \ highbd_8_variance(a, a_stride, b, b_stride, W, H, sse, &sum); \ return *sse - (((int64_t)sum * sum) / (W * H)); \ } \ \ uint32_t vpx_highbd_10_variance##W##x##H##_c(const uint8_t *a, \ int a_stride, \ const uint8_t *b, \ int b_stride, \ uint32_t *sse) { \ int sum; \ highbd_10_variance(a, a_stride, b, b_stride, W, H, sse, &sum); \ return *sse - (((int64_t)sum * sum) / (W * H)); \ } \ \ uint32_t vpx_highbd_12_variance##W##x##H##_c(const uint8_t *a, \ int a_stride, \ const uint8_t *b, \ int b_stride, \ uint32_t *sse) { \ int sum; \ highbd_12_variance(a, a_stride, b, b_stride, W, H, sse, &sum); \ return *sse - (((int64_t)sum * sum) / (W * H)); \ } #define HIGHBD_GET_VAR(S) \ void vpx_highbd_8_get##S##x##S##var_c(const uint8_t *src, int src_stride, \ const uint8_t *ref, int ref_stride, \ uint32_t *sse, int *sum) { \ highbd_8_variance(src, src_stride, ref, ref_stride, S, S, sse, sum); \ } \ \ void vpx_highbd_10_get##S##x##S##var_c(const uint8_t *src, int src_stride, \ const uint8_t *ref, int ref_stride, \ uint32_t *sse, int *sum) { \ highbd_10_variance(src, src_stride, ref, ref_stride, S, S, sse, sum); \ } \ \ void vpx_highbd_12_get##S##x##S##var_c(const uint8_t *src, int src_stride, \ const uint8_t *ref, int ref_stride, \ uint32_t *sse, int *sum) { \ highbd_12_variance(src, src_stride, ref, ref_stride, S, S, sse, sum); \ } #define HIGHBD_MSE(W, H) \ uint32_t vpx_highbd_8_mse##W##x##H##_c(const uint8_t *src, \ int src_stride, \ const uint8_t *ref, \ int ref_stride, \ uint32_t *sse) { \ int sum; \ highbd_8_variance(src, src_stride, ref, ref_stride, W, H, sse, &sum); \ return *sse; \ } \ \ uint32_t vpx_highbd_10_mse##W##x##H##_c(const uint8_t *src, \ int src_stride, \ const uint8_t *ref, \ int ref_stride, \ uint32_t *sse) { \ int sum; \ highbd_10_variance(src, src_stride, ref, ref_stride, W, H, sse, &sum); \ return *sse; \ } \ \ uint32_t vpx_highbd_12_mse##W##x##H##_c(const uint8_t *src, \ int src_stride, \ const uint8_t *ref, \ int ref_stride, \ uint32_t *sse) { \ int sum; \ highbd_12_variance(src, src_stride, ref, ref_stride, W, H, sse, &sum); \ return *sse; \ } static void highbd_var_filter_block2d_bil_first_pass( const uint8_t *src_ptr8, uint16_t *output_ptr, unsigned int src_pixels_per_line, int pixel_step, unsigned int output_height, unsigned int output_width, const uint8_t *filter) { unsigned int i, j; uint16_t *src_ptr = CONVERT_TO_SHORTPTR(src_ptr8); for (i = 0; i < output_height; ++i) { for (j = 0; j < output_width; ++j) { output_ptr[j] = ROUND_POWER_OF_TWO((int)src_ptr[0] * filter[0] + (int)src_ptr[pixel_step] * filter[1], FILTER_BITS); ++src_ptr; } // Next row... src_ptr += src_pixels_per_line - output_width; output_ptr += output_width; } } static void highbd_var_filter_block2d_bil_second_pass( const uint16_t *src_ptr, uint16_t *output_ptr, unsigned int src_pixels_per_line, unsigned int pixel_step, unsigned int output_height, unsigned int output_width, const uint8_t *filter) { unsigned int i, j; for (i = 0; i < output_height; ++i) { for (j = 0; j < output_width; ++j) { output_ptr[j] = ROUND_POWER_OF_TWO((int)src_ptr[0] * filter[0] + (int)src_ptr[pixel_step] * filter[1], FILTER_BITS); ++src_ptr; } src_ptr += src_pixels_per_line - output_width; output_ptr += output_width; } } #define HIGHBD_SUBPIX_VAR(W, H) \ uint32_t vpx_highbd_8_sub_pixel_variance##W##x##H##_c( \ const uint8_t *src, int src_stride, \ int xoffset, int yoffset, \ const uint8_t *dst, int dst_stride, \ uint32_t *sse) { \ uint16_t fdata3[(H + 1) * W]; \ uint16_t temp2[H * W]; \ \ highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \ W, bilinear_filters[xoffset]); \ highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \ bilinear_filters[yoffset]); \ \ return vpx_highbd_8_variance##W##x##H##_c(CONVERT_TO_BYTEPTR(temp2), W, dst, \ dst_stride, sse); \ } \ \ uint32_t vpx_highbd_10_sub_pixel_variance##W##x##H##_c( \ const uint8_t *src, int src_stride, \ int xoffset, int yoffset, \ const uint8_t *dst, int dst_stride, \ uint32_t *sse) { \ uint16_t fdata3[(H + 1) * W]; \ uint16_t temp2[H * W]; \ \ highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \ W, bilinear_filters[xoffset]); \ highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \ bilinear_filters[yoffset]); \ \ return vpx_highbd_10_variance##W##x##H##_c(CONVERT_TO_BYTEPTR(temp2), \ W, dst, dst_stride, sse); \ } \ \ uint32_t vpx_highbd_12_sub_pixel_variance##W##x##H##_c( \ const uint8_t *src, int src_stride, \ int xoffset, int yoffset, \ const uint8_t *dst, int dst_stride, \ uint32_t *sse) { \ uint16_t fdata3[(H + 1) * W]; \ uint16_t temp2[H * W]; \ \ highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \ W, bilinear_filters[xoffset]); \ highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \ bilinear_filters[yoffset]); \ \ return vpx_highbd_12_variance##W##x##H##_c(CONVERT_TO_BYTEPTR(temp2), \ W, dst, dst_stride, sse); \ } #define HIGHBD_SUBPIX_AVG_VAR(W, H) \ uint32_t vpx_highbd_8_sub_pixel_avg_variance##W##x##H##_c( \ const uint8_t *src, int src_stride, \ int xoffset, int yoffset, \ const uint8_t *dst, int dst_stride, \ uint32_t *sse, \ const uint8_t *second_pred) { \ uint16_t fdata3[(H + 1) * W]; \ uint16_t temp2[H * W]; \ DECLARE_ALIGNED(16, uint16_t, temp3[H * W]); \ \ highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \ W, bilinear_filters[xoffset]); \ highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \ bilinear_filters[yoffset]); \ \ vpx_highbd_comp_avg_pred(temp3, second_pred, W, H, \ CONVERT_TO_BYTEPTR(temp2), W); \ \ return vpx_highbd_8_variance##W##x##H##_c(CONVERT_TO_BYTEPTR(temp3), W, dst, \ dst_stride, sse); \ } \ \ uint32_t vpx_highbd_10_sub_pixel_avg_variance##W##x##H##_c( \ const uint8_t *src, int src_stride, \ int xoffset, int yoffset, \ const uint8_t *dst, int dst_stride, \ uint32_t *sse, \ const uint8_t *second_pred) { \ uint16_t fdata3[(H + 1) * W]; \ uint16_t temp2[H * W]; \ DECLARE_ALIGNED(16, uint16_t, temp3[H * W]); \ \ highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \ W, bilinear_filters[xoffset]); \ highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \ bilinear_filters[yoffset]); \ \ vpx_highbd_comp_avg_pred(temp3, second_pred, W, H, \ CONVERT_TO_BYTEPTR(temp2), W); \ \ return vpx_highbd_10_variance##W##x##H##_c(CONVERT_TO_BYTEPTR(temp3), \ W, dst, dst_stride, sse); \ } \ \ uint32_t vpx_highbd_12_sub_pixel_avg_variance##W##x##H##_c( \ const uint8_t *src, int src_stride, \ int xoffset, int yoffset, \ const uint8_t *dst, int dst_stride, \ uint32_t *sse, \ const uint8_t *second_pred) { \ uint16_t fdata3[(H + 1) * W]; \ uint16_t temp2[H * W]; \ DECLARE_ALIGNED(16, uint16_t, temp3[H * W]); \ \ highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \ W, bilinear_filters[xoffset]); \ highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \ bilinear_filters[yoffset]); \ \ vpx_highbd_comp_avg_pred(temp3, second_pred, W, H, \ CONVERT_TO_BYTEPTR(temp2), W); \ \ return vpx_highbd_12_variance##W##x##H##_c(CONVERT_TO_BYTEPTR(temp3), \ W, dst, dst_stride, sse); \ } /* All three forms of the variance are available in the same sizes. */ #define HIGHBD_VARIANCES(W, H) \ HIGHBD_VAR(W, H) \ HIGHBD_SUBPIX_VAR(W, H) \ HIGHBD_SUBPIX_AVG_VAR(W, H) HIGHBD_VARIANCES(64, 64) HIGHBD_VARIANCES(64, 32) HIGHBD_VARIANCES(32, 64) HIGHBD_VARIANCES(32, 32) HIGHBD_VARIANCES(32, 16) HIGHBD_VARIANCES(16, 32) HIGHBD_VARIANCES(16, 16) HIGHBD_VARIANCES(16, 8) HIGHBD_VARIANCES(8, 16) HIGHBD_VARIANCES(8, 8) HIGHBD_VARIANCES(8, 4) HIGHBD_VARIANCES(4, 8) HIGHBD_VARIANCES(4, 4) HIGHBD_GET_VAR(8) HIGHBD_GET_VAR(16) HIGHBD_MSE(16, 16) HIGHBD_MSE(16, 8) HIGHBD_MSE(8, 16) HIGHBD_MSE(8, 8) void vpx_highbd_comp_avg_pred(uint16_t *comp_pred, const uint8_t *pred8, int width, int height, const uint8_t *ref8, int ref_stride) { int i, j; uint16_t *pred = CONVERT_TO_SHORTPTR(pred8); uint16_t *ref = CONVERT_TO_SHORTPTR(ref8); for (i = 0; i < height; ++i) { for (j = 0; j < width; ++j) { const int tmp = pred[j] + ref[j]; comp_pred[j] = ROUND_POWER_OF_TWO(tmp, 1); } comp_pred += width; pred += width; ref += ref_stride; } } #endif // CONFIG_VP9_HIGHBITDEPTH