mirror of
https://chromium.googlesource.com/libyuv/libyuv
synced 2025-12-07 01:06:46 +08:00
3de12ae1c6
Consolidate rotate files. Add unit tests for I420 and NV12 rotate functions. Fix remaining pitch/stride references. Review URL: http://webrtc-codereview.appspot.com/239001 git-svn-id: http://libyuv.googlecode.com/svn/trunk@32 16f28f9a-4ce2-e073-06de-1de4eb20be90
415 lines
13 KiB
C++
415 lines
13 KiB
C++
/*
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* Copyright (c) 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/planar_functions.h"
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#include "libyuv/rotate.h"
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#include "rotate_priv.h"
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namespace libyuv {
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typedef void (*reverse_uv_func)(const uint8*, uint8*, uint8*, int);
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typedef void (*reverse_func)(const uint8*, uint8*, int);
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typedef void (*rotate_uv_wx8_func)(const uint8*, int,
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uint8*, int,
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uint8*, int, int);
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typedef void (*rotate_uv_wxh_func)(const uint8*, int,
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uint8*, int,
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uint8*, int, int, int);
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typedef void (*rotate_wx8_func)(const uint8*, int, uint8*, int, int);
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typedef void (*rotate_wxh_func)(const uint8*, int, uint8*, int, int, int);
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#ifdef __ARM_NEON__
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extern "C" {
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void RestoreRegisters_NEON(unsigned long long *restore);
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void SaveRegisters_NEON(unsigned long long *store);
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void ReverseLine_NEON(const uint8* src, uint8* dst, int width);
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void ReverseLineUV_NEON(const uint8* src,
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uint8* dst_a, uint8* dst_b,
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int width);
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void TransposeWx8_NEON(const uint8* src, int src_stride,
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uint8* dst, int dst_stride, int width);
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void TransposeUVWx8_NEON(const uint8* src, int src_stride,
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uint8* dst_a, int dst_stride_a,
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uint8* dst_b, int dst_stride_b,
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int width);
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} // extern "C"
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#endif
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static void TransposeWx8_C(const uint8* src, int src_stride,
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uint8* dst, int dst_stride,
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int w) {
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int i, j;
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for (i = 0; i < w; ++i)
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for (j = 0; j < 8; ++j)
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dst[i * dst_stride + j] = src[j * src_stride + i];
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}
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static void TransposeWxH_C(const uint8* src, int src_stride,
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uint8* dst, int dst_stride,
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int width, int height) {
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int i, j;
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for (i = 0; i < width; ++i)
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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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void TransposePlane(const uint8* src, int src_stride,
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uint8* dst, int dst_stride,
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int width, int height) {
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int i = height;
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rotate_wx8_func TransposeWx8;
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rotate_wxh_func TransposeWxH;
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// do processor detection here.
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#ifdef __ARM_NEON__
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TransposeWx8 = TransposeWx8_NEON;
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TransposeWxH = TransposeWxH_C;
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#else
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TransposeWx8 = TransposeWx8_C;
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TransposeWxH = TransposeWxH_C;
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#endif
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// work across the source in 8x8 tiles
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while (i >= 8) {
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TransposeWx8(src, src_stride, dst, dst_stride, width);
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src += 8 * src_stride; // go down 8 rows
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dst += 8; // move over 8 columns
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i -= 8;
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}
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TransposeWxH(src, src_stride, dst, dst_stride, width, i);
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}
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void RotatePlane90(const uint8* src, int src_stride,
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uint8* dst, int dst_stride,
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int width, int height) {
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// Rotate by 90 is a transpose with the source read
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// from bottom to top. So set the source pointer to the end
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// of the buffer and flip the sign of the source stride.
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src += src_stride * (height - 1);
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src_stride = -src_stride;
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TransposePlane(src, src_stride, dst, dst_stride, width, height);
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}
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void RotatePlane270(const uint8* src, int src_stride,
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uint8* dst, int dst_stride,
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int width, int height) {
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// Rotate by 270 is a transpose with the destination written
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// from bottom to top. So set the destination pointer to the end
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// of the buffer and flip the sign of the destination stride.
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dst += dst_stride * (width - 1);
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dst_stride = -dst_stride;
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TransposePlane(src, src_stride, dst, dst_stride, width, height);
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}
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void ReverseLine_C(const uint8* src, uint8* dst, int width) {
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int i;
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src += width;
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for (i = 0; i < width; ++i) {
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--src;
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dst[i] = src[0];
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}
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}
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void RotatePlane180(const uint8* src, int src_stride,
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uint8* dst, int dst_stride,
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int width, int height) {
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int i;
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reverse_func ReverseLine;
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// TODO(frkoenig): do processor detection here.
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#ifdef __ARM_NEON__
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ReverseLine = ReverseLine_NEON;
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#else
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ReverseLine = ReverseLine_C;
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#endif
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// Rotate by 180 is a mirror with the destination
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// written in reverse.
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dst += dst_stride * (height - 1);
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for (i = 0; i < height; ++i) {
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ReverseLine(src, dst, width);
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src += src_stride;
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dst -= dst_stride;
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}
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}
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static void TransposeUVWx8_C(const uint8* src, int src_stride,
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uint8* dst_a, int dst_stride_a,
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uint8* dst_b, int dst_stride_b,
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int w) {
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int i, j;
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for (i = 0; i < w * 2; i += 2)
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for (j = 0; j < 8; ++j) {
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dst_a[j + ((i >> 1) * dst_stride_a)] = src[i + (j * src_stride)];
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dst_b[j + ((i >> 1) * dst_stride_b)] = src[i + (j * src_stride) + 1];
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}
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}
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static void TransposeUVWxH_C(const uint8* src, int src_stride,
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uint8* dst_a, int dst_stride_a,
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uint8* dst_b, int dst_stride_b,
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int w, int h) {
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int i, j;
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for (i = 0; i < w*2; i += 2)
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for (j = 0; j < h; ++j) {
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dst_a[j + ((i >> 1) * dst_stride_a)] = src[i + (j * src_stride)];
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dst_b[j + ((i >> 1) * dst_stride_b)] = src[i + (j * src_stride) + 1];
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}
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}
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void TransposeUV(const uint8* src, int src_stride,
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uint8* dst_a, int dst_stride_a,
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uint8* dst_b, int dst_stride_b,
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int width, int height) {
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int i = height;
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rotate_uv_wx8_func TransposeWx8;
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rotate_uv_wxh_func TransposeWxH;
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// do processor detection here.
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#ifdef __ARM_NEON__
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unsigned long long store_reg[8];
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SaveRegisters_NEON(store_reg);
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TransposeWx8 = TransposeUVWx8_NEON;
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TransposeWxH = TransposeUVWxH_C;
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#else
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TransposeWx8 = TransposeUVWx8_C;
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TransposeWxH = TransposeUVWxH_C;
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#endif
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// work through the source in 8x8 tiles
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while (i >= 8) {
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TransposeWx8(src, src_stride,
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dst_a, dst_stride_a,
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dst_b, dst_stride_b,
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width);
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src += 8 * src_stride; // go down 8 rows
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dst_a += 8; // move over 8 columns
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dst_b += 8; // move over 8 columns
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i -= 8;
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}
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TransposeWxH(src, src_stride,
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dst_a, dst_stride_a,
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dst_b, dst_stride_b,
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width, i);
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#ifdef __ARM_NEON__
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RestoreRegisters_NEON(store_reg);
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#endif
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}
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void RotateUV90(const uint8* src, int src_stride,
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uint8* dst_a, int dst_stride_a,
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uint8* dst_b, int dst_stride_b,
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int width, int height) {
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src += src_stride * (height - 1);
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src_stride = -src_stride;
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TransposeUV(src, src_stride,
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dst_a, dst_stride_a,
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dst_b, dst_stride_b,
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width, height);
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}
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void RotateUV270(const uint8* src, int src_stride,
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uint8* dst_a, int dst_stride_a,
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uint8* dst_b, int dst_stride_b,
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int width, int height) {
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dst_a += dst_stride_a * (width - 1);
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dst_b += dst_stride_b * (width - 1);
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dst_stride_a = -dst_stride_a;
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dst_stride_b = -dst_stride_b;
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TransposeUV(src, src_stride,
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dst_a, dst_stride_a,
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dst_b, dst_stride_b,
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width, height);
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}
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static void ReverseLineUV_C(const uint8* src,
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uint8* dst_a, uint8* dst_b,
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int width) {
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int i;
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src += width << 1;
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for (i = 0; i < width; ++i) {
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src -= 2;
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dst_a[i] = src[0];
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dst_b[i] = src[1];
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}
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}
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void RotateUV180(const uint8* src, int src_stride,
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uint8* dst_a, int dst_stride_a,
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uint8* dst_b, int dst_stride_b,
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int width, int height) {
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int i;
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reverse_uv_func ReverseLine;
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// TODO(frkoenig) : do processor detection here.
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#ifdef __ARM_NEON__
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ReverseLine = ReverseLineUV_NEON;
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#else
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ReverseLine = ReverseLineUV_C;
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#endif
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dst_a += dst_stride_a * (height - 1);
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dst_b += dst_stride_b * (height - 1);
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for (i = 0; i < height; ++i) {
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ReverseLine(src, dst_a, dst_b, width);
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src += src_stride; // down one line at a time
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dst_a -= dst_stride_a; // nominally up one line at a time
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dst_b -= dst_stride_b; // nominally up one line at a time
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}
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}
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int I420Rotate(const uint8* src_y, int src_stride_y,
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const uint8* src_u, int src_stride_u,
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const uint8* src_v, int src_stride_v,
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uint8* dst_y, int dst_stride_y,
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uint8* dst_u, int dst_stride_u,
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uint8* dst_v, int dst_stride_v,
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int width, int height,
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RotationMode mode) {
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int halfwidth = (width + 1) >> 1;
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int halfheight = (height + 1) >> 1;
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// Negative height means invert the image.
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if (height < 0) {
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height = -height;
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halfheight = (height + 1) >> 1;
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src_y = src_y + (height - 1) * src_stride_y;
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src_u = src_u + (halfheight - 1) * src_stride_u;
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src_v = src_v + (halfheight - 1) * src_stride_v;
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src_stride_y = -src_stride_y;
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src_stride_u = -src_stride_u;
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src_stride_v = -src_stride_v;
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}
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switch (mode) {
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case kRotateNone:
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// copy frame
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return I420Copy(src_y, src_stride_y,
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src_u, src_stride_u,
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src_v, src_stride_v,
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dst_y, dst_stride_y,
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dst_u, dst_stride_u,
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dst_v, dst_stride_v,
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width, height);
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case kRotateClockwise:
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RotatePlane90(src_y, src_stride_y,
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dst_y, dst_stride_y,
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width, height);
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RotatePlane90(src_u, src_stride_u,
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dst_u, dst_stride_u,
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halfwidth, halfheight);
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RotatePlane90(src_v, src_stride_v,
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dst_v, dst_stride_v,
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halfwidth, halfheight);
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return 0;
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case kRotateCounterClockwise:
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RotatePlane270(src_y, src_stride_y,
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dst_y, dst_stride_y,
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width, height);
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RotatePlane270(src_u, src_stride_u,
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dst_u, dst_stride_u,
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halfwidth, halfheight);
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RotatePlane270(src_v, src_stride_v,
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dst_v, dst_stride_v,
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halfwidth, halfheight);
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return 0;
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case kRotate180:
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RotatePlane180(src_y, src_stride_y,
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dst_y, dst_stride_y,
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width, height);
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RotatePlane180(src_u, src_stride_u,
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dst_u, dst_stride_u,
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halfwidth, halfheight);
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RotatePlane180(src_v, src_stride_v,
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dst_v, dst_stride_v,
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halfwidth, halfheight);
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return 0;
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default:
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break;
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}
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return -1;
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}
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int NV12ToI420Rotate(const uint8* src_y, int src_stride_y,
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const uint8* src_uv, int src_stride_uv,
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uint8* dst_y, int dst_stride_y,
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uint8* dst_u, int dst_stride_u,
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uint8* dst_v, int dst_stride_v,
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int width, int height,
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RotationMode mode) {
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int halfwidth = (width + 1) >> 1;
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int halfheight = (height + 1) >> 1;
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// Negative height means invert the image.
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if (height < 0) {
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height = -height;
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halfheight = (height + 1) >> 1;
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src_y = src_y + (height - 1) * src_stride_y;
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src_uv = src_uv + (halfheight - 1) * src_stride_uv;
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src_stride_y = -src_stride_y;
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src_stride_uv = -src_stride_uv;
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}
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switch (mode) {
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case kRotateNone:
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// copy frame
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return NV12ToI420(src_y, src_uv, src_stride_y,
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dst_y, dst_stride_y,
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dst_u, dst_stride_u,
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dst_v, dst_stride_v,
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width, height);
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case kRotateClockwise:
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RotatePlane90(src_y, src_stride_y,
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dst_y, dst_stride_y,
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width, height);
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RotateUV90(src_uv, src_stride_uv,
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dst_u, dst_stride_u,
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dst_v, dst_stride_v,
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halfwidth, halfheight);
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return 0;
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case kRotateCounterClockwise:
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RotatePlane270(src_y, src_stride_y,
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dst_y, dst_stride_y,
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width, height);
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RotateUV270(src_uv, src_stride_uv,
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dst_u, dst_stride_u,
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dst_v, dst_stride_v,
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halfwidth, halfheight);
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return 0;
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case kRotate180:
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RotatePlane180(src_y, src_stride_y,
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dst_y, dst_stride_y,
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width, height);
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RotateUV180(src_uv, src_stride_uv,
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dst_u, dst_stride_u,
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dst_v, dst_stride_v,
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halfwidth, halfheight);
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return 0;
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default:
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break;
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}
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return -1;
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}
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} // namespace libyuv
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