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https://chromium.googlesource.com/libyuv/libyuv
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4f7fd808b7
The existing Neon code only makes use of 64-bit vectors throughout which limits the performance on larger cores. To avoid this, swap the Neon code from a Wx8 implementation to a Wx16 implementation and process blocks of 16 full vectors at a time. The original code also handled widths that were not exact multiples of 16, however this should already be handled by the "any" kernel so it is removed. Finally, avoid duplicating the TransposeWx16_C fallback kernel definition in all architectures that need it, and just put it once in rotate_common.cc instead. Observed speedups for TransposePlane across a range of micro-architectures: Cortex-A53: -40.0% Cortex-A55: -20.7% Cortex-A57: -43.9% Cortex-A510: -43.5% Cortex-A520: -43.9% Cortex-A720: -31.1% Cortex-X2: -38.3% Cortex-X4: -43.6% Change-Id: Ic7c4d5f24eb27091d743ddc00cd95ef178b6984e Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5545459 Reviewed-by: Frank Barchard <fbarchard@chromium.org>
209 lines
6.2 KiB
C++
209 lines
6.2 KiB
C++
/*
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* Copyright 2011 The LibYuv 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 "libyuv/rotate_row.h"
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#include "libyuv/row.h"
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#ifdef __cplusplus
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namespace libyuv {
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extern "C" {
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#endif
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void TransposeWx8_C(const uint8_t* src,
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int src_stride,
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uint8_t* dst,
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int dst_stride,
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int width) {
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int i;
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for (i = 0; i < width; ++i) {
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dst[0] = src[0 * src_stride];
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dst[1] = src[1 * src_stride];
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dst[2] = src[2 * src_stride];
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dst[3] = src[3 * src_stride];
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dst[4] = src[4 * src_stride];
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dst[5] = src[5 * src_stride];
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dst[6] = src[6 * src_stride];
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dst[7] = src[7 * src_stride];
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++src;
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dst += dst_stride;
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}
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}
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void TransposeWx16_C(const uint8_t* src,
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int src_stride,
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uint8_t* dst,
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int dst_stride,
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int width) {
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TransposeWx8_C(src, src_stride, dst, dst_stride, width);
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TransposeWx8_C((src + 8 * src_stride), src_stride, (dst + 8), dst_stride,
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width);
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}
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void TransposeUVWx8_C(const uint8_t* src,
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int src_stride,
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uint8_t* dst_a,
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int dst_stride_a,
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uint8_t* dst_b,
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int dst_stride_b,
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int width) {
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int i;
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for (i = 0; i < width; ++i) {
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dst_a[0] = src[0 * src_stride + 0];
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dst_b[0] = src[0 * src_stride + 1];
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dst_a[1] = src[1 * src_stride + 0];
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dst_b[1] = src[1 * src_stride + 1];
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dst_a[2] = src[2 * src_stride + 0];
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dst_b[2] = src[2 * src_stride + 1];
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dst_a[3] = src[3 * src_stride + 0];
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dst_b[3] = src[3 * src_stride + 1];
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dst_a[4] = src[4 * src_stride + 0];
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dst_b[4] = src[4 * src_stride + 1];
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dst_a[5] = src[5 * src_stride + 0];
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dst_b[5] = src[5 * src_stride + 1];
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dst_a[6] = src[6 * src_stride + 0];
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dst_b[6] = src[6 * src_stride + 1];
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dst_a[7] = src[7 * src_stride + 0];
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dst_b[7] = src[7 * src_stride + 1];
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src += 2;
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dst_a += dst_stride_a;
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dst_b += dst_stride_b;
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}
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}
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void TransposeWxH_C(const uint8_t* src,
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int src_stride,
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uint8_t* dst,
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int dst_stride,
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int width,
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int height) {
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int i;
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for (i = 0; i < width; ++i) {
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int j;
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for (j = 0; j < height; ++j) {
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dst[i * dst_stride + j] = src[j * src_stride + i];
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}
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}
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}
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void TransposeUVWxH_C(const uint8_t* src,
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int src_stride,
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uint8_t* dst_a,
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int dst_stride_a,
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uint8_t* dst_b,
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int dst_stride_b,
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int width,
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int height) {
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int i;
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for (i = 0; i < width * 2; i += 2) {
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int j;
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for (j = 0; j < height; ++j) {
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dst_a[((i >> 1) * dst_stride_a) + j] = src[i + (j * src_stride)];
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dst_b[((i >> 1) * dst_stride_b) + j] = src[i + (j * src_stride) + 1];
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}
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}
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}
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void TransposeWx8_16_C(const uint16_t* src,
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int src_stride,
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uint16_t* dst,
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int dst_stride,
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int width) {
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int i;
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for (i = 0; i < width; ++i) {
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dst[0] = src[0 * src_stride];
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dst[1] = src[1 * src_stride];
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dst[2] = src[2 * src_stride];
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dst[3] = src[3 * src_stride];
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dst[4] = src[4 * src_stride];
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dst[5] = src[5 * src_stride];
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dst[6] = src[6 * src_stride];
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dst[7] = src[7 * src_stride];
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++src;
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dst += dst_stride;
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}
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}
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void TransposeWxH_16_C(const uint16_t* src,
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int src_stride,
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uint16_t* dst,
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int dst_stride,
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int width,
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int height) {
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int i;
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for (i = 0; i < width; ++i) {
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int j;
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for (j = 0; j < height; ++j) {
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dst[i * dst_stride + j] = src[j * src_stride + i];
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}
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}
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}
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// Transpose 32 bit values (ARGB)
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void Transpose4x4_32_C(const uint8_t* src,
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int src_stride,
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uint8_t* dst,
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int dst_stride,
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int width) {
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const uint8_t* src1 = src + src_stride;
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const uint8_t* src2 = src1 + src_stride;
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const uint8_t* src3 = src2 + src_stride;
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uint8_t* dst1 = dst + dst_stride;
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uint8_t* dst2 = dst1 + dst_stride;
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uint8_t* dst3 = dst2 + dst_stride;
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int i;
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for (i = 0; i < width; i += 4) {
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uint32_t p00 = ((uint32_t*)(src))[0];
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uint32_t p10 = ((uint32_t*)(src))[1];
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uint32_t p20 = ((uint32_t*)(src))[2];
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uint32_t p30 = ((uint32_t*)(src))[3];
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uint32_t p01 = ((uint32_t*)(src1))[0];
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uint32_t p11 = ((uint32_t*)(src1))[1];
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uint32_t p21 = ((uint32_t*)(src1))[2];
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uint32_t p31 = ((uint32_t*)(src1))[3];
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uint32_t p02 = ((uint32_t*)(src2))[0];
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uint32_t p12 = ((uint32_t*)(src2))[1];
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uint32_t p22 = ((uint32_t*)(src2))[2];
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uint32_t p32 = ((uint32_t*)(src2))[3];
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uint32_t p03 = ((uint32_t*)(src3))[0];
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uint32_t p13 = ((uint32_t*)(src3))[1];
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uint32_t p23 = ((uint32_t*)(src3))[2];
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uint32_t p33 = ((uint32_t*)(src3))[3];
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((uint32_t*)(dst))[0] = p00;
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((uint32_t*)(dst))[1] = p01;
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((uint32_t*)(dst))[2] = p02;
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((uint32_t*)(dst))[3] = p03;
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((uint32_t*)(dst1))[0] = p10;
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((uint32_t*)(dst1))[1] = p11;
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((uint32_t*)(dst1))[2] = p12;
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((uint32_t*)(dst1))[3] = p13;
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((uint32_t*)(dst2))[0] = p20;
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((uint32_t*)(dst2))[1] = p21;
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((uint32_t*)(dst2))[2] = p22;
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((uint32_t*)(dst2))[3] = p23;
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((uint32_t*)(dst3))[0] = p30;
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((uint32_t*)(dst3))[1] = p31;
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((uint32_t*)(dst3))[2] = p32;
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((uint32_t*)(dst3))[3] = p33;
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src += src_stride * 4; // advance 4 rows
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src1 += src_stride * 4;
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src2 += src_stride * 4;
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src3 += src_stride * 4;
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dst += 4 * 4; // advance 4 columns
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dst1 += 4 * 4;
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dst2 += 4 * 4;
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dst3 += 4 * 4;
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}
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}
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#ifdef __cplusplus
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} // extern "C"
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} // namespace libyuv
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#endif
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