| /* |
| * Copyright (c) 2014 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 <arm_neon.h> |
| #include "./vpx_dsp_rtcd.h" |
| #include "./vpx_config.h" |
| |
| #include "vpx/vpx_integer.h" |
| |
| #include "vpx_dsp/variance.h" |
| #include "vpx_dsp/arm/mem_neon.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 }, |
| }; |
| |
| // Process a block exactly 4 wide and a multiple of 2 high. |
| static void var_filter_block2d_bil_w4(const uint8_t *src_ptr, |
| uint8_t *output_ptr, |
| unsigned int src_pixels_per_line, |
| int pixel_step, |
| unsigned int output_height, |
| const uint8_t *filter) { |
| const uint8x8_t f0 = vdup_n_u8(filter[0]); |
| const uint8x8_t f1 = vdup_n_u8(filter[1]); |
| unsigned int i; |
| for (i = 0; i < output_height; i += 2) { |
| const uint8x8_t src_0 = load_unaligned_u8(src_ptr, src_pixels_per_line); |
| const uint8x8_t src_1 = |
| load_unaligned_u8(src_ptr + pixel_step, src_pixels_per_line); |
| const uint16x8_t a = vmull_u8(src_0, f0); |
| const uint16x8_t b = vmlal_u8(a, src_1, f1); |
| const uint8x8_t out = vrshrn_n_u16(b, FILTER_BITS); |
| vst1_u8(output_ptr, out); |
| src_ptr += 2 * src_pixels_per_line; |
| output_ptr += 8; |
| } |
| } |
| |
| // Process a block exactly 8 wide and any height. |
| static void var_filter_block2d_bil_w8(const uint8_t *src_ptr, |
| uint8_t *output_ptr, |
| unsigned int src_pixels_per_line, |
| int pixel_step, |
| unsigned int output_height, |
| const uint8_t *filter) { |
| const uint8x8_t f0 = vdup_n_u8(filter[0]); |
| const uint8x8_t f1 = vdup_n_u8(filter[1]); |
| unsigned int i; |
| for (i = 0; i < output_height; ++i) { |
| const uint8x8_t src_0 = vld1_u8(&src_ptr[0]); |
| const uint8x8_t src_1 = vld1_u8(&src_ptr[pixel_step]); |
| const uint16x8_t a = vmull_u8(src_0, f0); |
| const uint16x8_t b = vmlal_u8(a, src_1, f1); |
| const uint8x8_t out = vrshrn_n_u16(b, FILTER_BITS); |
| vst1_u8(output_ptr, out); |
| src_ptr += src_pixels_per_line; |
| output_ptr += 8; |
| } |
| } |
| |
| // Process a block which is a mutiple of 16 wide and any height. |
| static void var_filter_block2d_bil_w16(const uint8_t *src_ptr, |
| uint8_t *output_ptr, |
| unsigned int src_pixels_per_line, |
| int pixel_step, |
| unsigned int output_height, |
| unsigned int output_width, |
| const uint8_t *filter) { |
| const uint8x8_t f0 = vdup_n_u8(filter[0]); |
| const uint8x8_t f1 = vdup_n_u8(filter[1]); |
| unsigned int i, j; |
| for (i = 0; i < output_height; ++i) { |
| for (j = 0; j < output_width; j += 16) { |
| const uint8x16_t src_0 = vld1q_u8(&src_ptr[j]); |
| const uint8x16_t src_1 = vld1q_u8(&src_ptr[j + pixel_step]); |
| const uint16x8_t a = vmull_u8(vget_low_u8(src_0), f0); |
| const uint16x8_t b = vmlal_u8(a, vget_low_u8(src_1), f1); |
| const uint8x8_t out_lo = vrshrn_n_u16(b, FILTER_BITS); |
| const uint16x8_t c = vmull_u8(vget_high_u8(src_0), f0); |
| const uint16x8_t d = vmlal_u8(c, vget_high_u8(src_1), f1); |
| const uint8x8_t out_hi = vrshrn_n_u16(d, FILTER_BITS); |
| vst1q_u8(output_ptr + j, vcombine_u8(out_lo, out_hi)); |
| } |
| src_ptr += src_pixels_per_line; |
| output_ptr += output_width; |
| } |
| } |
| |
| // 4xM filter writes an extra row to fdata because it processes two rows at a |
| // time. |
| #define sub_pixel_varianceNxM(n, m) \ |
| uint32_t vpx_sub_pixel_variance##n##x##m##_neon( \ |
| const uint8_t *src_ptr, int src_stride, int x_offset, int y_offset, \ |
| const uint8_t *ref_ptr, int ref_stride, uint32_t *sse) { \ |
| uint8_t temp0[n * (m + (n == 4 ? 2 : 1))]; \ |
| uint8_t temp1[n * m]; \ |
| \ |
| if (n == 4) { \ |
| var_filter_block2d_bil_w4(src_ptr, temp0, src_stride, 1, (m + 2), \ |
| bilinear_filters[x_offset]); \ |
| var_filter_block2d_bil_w4(temp0, temp1, n, n, m, \ |
| bilinear_filters[y_offset]); \ |
| } else if (n == 8) { \ |
| var_filter_block2d_bil_w8(src_ptr, temp0, src_stride, 1, (m + 1), \ |
| bilinear_filters[x_offset]); \ |
| var_filter_block2d_bil_w8(temp0, temp1, n, n, m, \ |
| bilinear_filters[y_offset]); \ |
| } else { \ |
| var_filter_block2d_bil_w16(src_ptr, temp0, src_stride, 1, (m + 1), n, \ |
| bilinear_filters[x_offset]); \ |
| var_filter_block2d_bil_w16(temp0, temp1, n, n, m, n, \ |
| bilinear_filters[y_offset]); \ |
| } \ |
| return vpx_variance##n##x##m(temp1, n, ref_ptr, ref_stride, sse); \ |
| } |
| |
| sub_pixel_varianceNxM(4, 4); |
| sub_pixel_varianceNxM(4, 8); |
| sub_pixel_varianceNxM(8, 4); |
| sub_pixel_varianceNxM(8, 8); |
| sub_pixel_varianceNxM(8, 16); |
| sub_pixel_varianceNxM(16, 8); |
| sub_pixel_varianceNxM(16, 16); |
| sub_pixel_varianceNxM(16, 32); |
| sub_pixel_varianceNxM(32, 16); |
| sub_pixel_varianceNxM(32, 32); |
| sub_pixel_varianceNxM(32, 64); |
| sub_pixel_varianceNxM(64, 32); |
| sub_pixel_varianceNxM(64, 64); |
| |
| // 4xM filter writes an extra row to fdata because it processes two rows at a |
| // time. |
| #define sub_pixel_avg_varianceNxM(n, m) \ |
| uint32_t vpx_sub_pixel_avg_variance##n##x##m##_neon( \ |
| const uint8_t *src_ptr, int src_stride, int x_offset, int y_offset, \ |
| const uint8_t *ref_ptr, int ref_stride, uint32_t *sse, \ |
| const uint8_t *second_pred) { \ |
| uint8_t temp0[n * (m + (n == 4 ? 2 : 1))]; \ |
| uint8_t temp1[n * m]; \ |
| \ |
| if (n == 4) { \ |
| var_filter_block2d_bil_w4(src_ptr, temp0, src_stride, 1, (m + 2), \ |
| bilinear_filters[x_offset]); \ |
| var_filter_block2d_bil_w4(temp0, temp1, n, n, m, \ |
| bilinear_filters[y_offset]); \ |
| } else if (n == 8) { \ |
| var_filter_block2d_bil_w8(src_ptr, temp0, src_stride, 1, (m + 1), \ |
| bilinear_filters[x_offset]); \ |
| var_filter_block2d_bil_w8(temp0, temp1, n, n, m, \ |
| bilinear_filters[y_offset]); \ |
| } else { \ |
| var_filter_block2d_bil_w16(src_ptr, temp0, src_stride, 1, (m + 1), n, \ |
| bilinear_filters[x_offset]); \ |
| var_filter_block2d_bil_w16(temp0, temp1, n, n, m, n, \ |
| bilinear_filters[y_offset]); \ |
| } \ |
| \ |
| vpx_comp_avg_pred(temp0, second_pred, n, m, temp1, n); \ |
| \ |
| return vpx_variance##n##x##m(temp0, n, ref_ptr, ref_stride, sse); \ |
| } |
| |
| sub_pixel_avg_varianceNxM(4, 4); |
| sub_pixel_avg_varianceNxM(4, 8); |
| sub_pixel_avg_varianceNxM(8, 4); |
| sub_pixel_avg_varianceNxM(8, 8); |
| sub_pixel_avg_varianceNxM(8, 16); |
| sub_pixel_avg_varianceNxM(16, 8); |
| sub_pixel_avg_varianceNxM(16, 16); |
| sub_pixel_avg_varianceNxM(16, 32); |
| sub_pixel_avg_varianceNxM(32, 16); |
| sub_pixel_avg_varianceNxM(32, 32); |
| sub_pixel_avg_varianceNxM(32, 64); |
| sub_pixel_avg_varianceNxM(64, 32); |
| sub_pixel_avg_varianceNxM(64, 64); |