ref: 808a560be6a71dd0d27f29c26f9fefb5e809d373
dir: /vpx_dsp/arm/subpel_variance_neon.c/
/* * 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_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 }, }; 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, unsigned int output_width, const uint8_t *filter) { const uint8x8_t f0 = vmov_n_u8(filter[0]); const uint8x8_t f1 = vmov_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[0], out); // Next row... src_ptr += src_pixels_per_line; output_ptr += output_width; } } 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 = vmov_n_u8(filter[0]); const uint8x8_t f1 = vmov_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)); } // Next row... src_ptr += src_pixels_per_line; output_ptr += output_width; } } unsigned int vpx_sub_pixel_variance8x8_neon(const uint8_t *src, int src_stride, int xoffset, int yoffset, const uint8_t *dst, int dst_stride, unsigned int *sse) { DECLARE_ALIGNED(16, uint8_t, temp2[8 * 8]); DECLARE_ALIGNED(16, uint8_t, fdata3[9 * 8]); var_filter_block2d_bil_w8(src, fdata3, src_stride, 1, 9, 8, bilinear_filters[xoffset]); var_filter_block2d_bil_w8(fdata3, temp2, 8, 8, 8, 8, bilinear_filters[yoffset]); return vpx_variance8x8_neon(temp2, 8, dst, dst_stride, sse); } unsigned int vpx_sub_pixel_variance16x16_neon(const uint8_t *src, int src_stride, int xoffset, int yoffset, const uint8_t *dst, int dst_stride, unsigned int *sse) { DECLARE_ALIGNED(16, uint8_t, temp2[16 * 16]); DECLARE_ALIGNED(16, uint8_t, fdata3[17 * 16]); var_filter_block2d_bil_w16(src, fdata3, src_stride, 1, 17, 16, bilinear_filters[xoffset]); var_filter_block2d_bil_w16(fdata3, temp2, 16, 16, 16, 16, bilinear_filters[yoffset]); return vpx_variance16x16_neon(temp2, 16, dst, dst_stride, sse); } unsigned int vpx_sub_pixel_variance32x32_neon(const uint8_t *src, int src_stride, int xoffset, int yoffset, const uint8_t *dst, int dst_stride, unsigned int *sse) { DECLARE_ALIGNED(16, uint8_t, temp2[32 * 32]); DECLARE_ALIGNED(16, uint8_t, fdata3[33 * 32]); var_filter_block2d_bil_w16(src, fdata3, src_stride, 1, 33, 32, bilinear_filters[xoffset]); var_filter_block2d_bil_w16(fdata3, temp2, 32, 32, 32, 32, bilinear_filters[yoffset]); return vpx_variance32x32_neon(temp2, 32, dst, dst_stride, sse); } unsigned int vpx_sub_pixel_variance64x64_neon(const uint8_t *src, int src_stride, int xoffset, int yoffset, const uint8_t *dst, int dst_stride, unsigned int *sse) { DECLARE_ALIGNED(16, uint8_t, temp2[64 * 64]); DECLARE_ALIGNED(16, uint8_t, fdata3[65 * 64]); var_filter_block2d_bil_w16(src, fdata3, src_stride, 1, 65, 64, bilinear_filters[xoffset]); var_filter_block2d_bil_w16(fdata3, temp2, 64, 64, 64, 64, bilinear_filters[yoffset]); return vpx_variance64x64_neon(temp2, 64, dst, dst_stride, sse); }