241 lines
7.4 KiB
C++
241 lines
7.4 KiB
C++
/*
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* Copyright 2012 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.h"
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#include "libyuv/convert.h"
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#include "libyuv/cpu_id.h"
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#include "libyuv/planar_functions.h"
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#include "libyuv/row.h"
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#include "libyuv/scale_row.h" /* for ScaleARGBRowDownEven_ */
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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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static void ARGBTranspose(const uint8_t* src_argb,
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int src_stride_argb,
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uint8_t* dst_argb,
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int dst_stride_argb,
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int width,
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int height) {
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int i;
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int src_pixel_step = src_stride_argb >> 2;
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void (*ScaleARGBRowDownEven)(
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const uint8_t* src_argb, ptrdiff_t src_stride_argb, int src_step,
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uint8_t* dst_argb, int dst_width) = ScaleARGBRowDownEven_C;
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#if defined(HAS_SCALEARGBROWDOWNEVEN_SSE2)
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if (TestCpuFlag(kCpuHasSSE2)) {
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ScaleARGBRowDownEven = ScaleARGBRowDownEven_Any_SSE2;
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if (IS_ALIGNED(height, 4)) { // Width of dest.
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ScaleARGBRowDownEven = ScaleARGBRowDownEven_SSE2;
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}
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}
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#endif
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#if defined(HAS_SCALEARGBROWDOWNEVEN_NEON)
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if (TestCpuFlag(kCpuHasNEON)) {
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ScaleARGBRowDownEven = ScaleARGBRowDownEven_Any_NEON;
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if (IS_ALIGNED(height, 4)) { // Width of dest.
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ScaleARGBRowDownEven = ScaleARGBRowDownEven_NEON;
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}
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}
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#endif
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#if defined(HAS_SCALEARGBROWDOWNEVEN_MSA)
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if (TestCpuFlag(kCpuHasMSA)) {
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ScaleARGBRowDownEven = ScaleARGBRowDownEven_Any_MSA;
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if (IS_ALIGNED(height, 4)) { // Width of dest.
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ScaleARGBRowDownEven = ScaleARGBRowDownEven_MSA;
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}
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}
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#endif
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#if defined(HAS_SCALEARGBROWDOWNEVEN_MMI)
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if (TestCpuFlag(kCpuHasMMI)) {
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ScaleARGBRowDownEven = ScaleARGBRowDownEven_Any_MMI;
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if (IS_ALIGNED(height, 4)) { // Width of dest.
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ScaleARGBRowDownEven = ScaleARGBRowDownEven_MMI;
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}
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}
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#endif
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for (i = 0; i < width; ++i) { // column of source to row of dest.
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ScaleARGBRowDownEven(src_argb, 0, src_pixel_step, dst_argb, height);
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dst_argb += dst_stride_argb;
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src_argb += 4;
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}
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}
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void ARGBRotate90(const uint8_t* src_argb,
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int src_stride_argb,
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uint8_t* dst_argb,
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int dst_stride_argb,
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int width,
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int height) {
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// Rotate by 90 is a ARGBTranspose 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_argb += src_stride_argb * (height - 1);
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src_stride_argb = -src_stride_argb;
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ARGBTranspose(src_argb, src_stride_argb, dst_argb, dst_stride_argb, width,
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height);
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}
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void ARGBRotate270(const uint8_t* src_argb,
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int src_stride_argb,
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uint8_t* dst_argb,
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int dst_stride_argb,
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int width,
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int height) {
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// Rotate by 270 is a ARGBTranspose 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_argb += dst_stride_argb * (width - 1);
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dst_stride_argb = -dst_stride_argb;
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ARGBTranspose(src_argb, src_stride_argb, dst_argb, dst_stride_argb, width,
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height);
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}
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void ARGBRotate180(const uint8_t* src_argb,
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int src_stride_argb,
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uint8_t* dst_argb,
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int dst_stride_argb,
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int width,
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int height) {
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// Swap first and last row and mirror the content. Uses a temporary row.
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align_buffer_64(row, width * 4);
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const uint8_t* src_bot = src_argb + src_stride_argb * (height - 1);
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uint8_t* dst_bot = dst_argb + dst_stride_argb * (height - 1);
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int half_height = (height + 1) >> 1;
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int y;
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void (*ARGBMirrorRow)(const uint8_t* src_argb, uint8_t* dst_argb, int width) =
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ARGBMirrorRow_C;
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void (*CopyRow)(const uint8_t* src_argb, uint8_t* dst_argb, int width) =
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CopyRow_C;
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#if defined(HAS_ARGBMIRRORROW_NEON)
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if (TestCpuFlag(kCpuHasNEON)) {
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ARGBMirrorRow = ARGBMirrorRow_Any_NEON;
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if (IS_ALIGNED(width, 4)) {
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ARGBMirrorRow = ARGBMirrorRow_NEON;
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}
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}
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#endif
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#if defined(HAS_ARGBMIRRORROW_SSE2)
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if (TestCpuFlag(kCpuHasSSE2)) {
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ARGBMirrorRow = ARGBMirrorRow_Any_SSE2;
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if (IS_ALIGNED(width, 4)) {
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ARGBMirrorRow = ARGBMirrorRow_SSE2;
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}
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}
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#endif
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#if defined(HAS_ARGBMIRRORROW_AVX2)
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if (TestCpuFlag(kCpuHasAVX2)) {
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ARGBMirrorRow = ARGBMirrorRow_Any_AVX2;
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if (IS_ALIGNED(width, 8)) {
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ARGBMirrorRow = ARGBMirrorRow_AVX2;
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}
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}
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#endif
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#if defined(HAS_ARGBMIRRORROW_MSA)
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if (TestCpuFlag(kCpuHasMSA)) {
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ARGBMirrorRow = ARGBMirrorRow_Any_MSA;
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if (IS_ALIGNED(width, 16)) {
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ARGBMirrorRow = ARGBMirrorRow_MSA;
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}
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}
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#endif
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#if defined(HAS_ARGBMIRRORROW_MMI)
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if (TestCpuFlag(kCpuHasMMI)) {
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ARGBMirrorRow = ARGBMirrorRow_Any_MMI;
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if (IS_ALIGNED(width, 2)) {
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ARGBMirrorRow = ARGBMirrorRow_MMI;
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}
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}
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#endif
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#if defined(HAS_COPYROW_SSE2)
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if (TestCpuFlag(kCpuHasSSE2)) {
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CopyRow = IS_ALIGNED(width * 4, 32) ? CopyRow_SSE2 : CopyRow_Any_SSE2;
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}
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#endif
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#if defined(HAS_COPYROW_AVX)
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if (TestCpuFlag(kCpuHasAVX)) {
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CopyRow = IS_ALIGNED(width * 4, 64) ? CopyRow_AVX : CopyRow_Any_AVX;
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}
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#endif
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#if defined(HAS_COPYROW_ERMS)
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if (TestCpuFlag(kCpuHasERMS)) {
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CopyRow = CopyRow_ERMS;
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}
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#endif
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#if defined(HAS_COPYROW_NEON)
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if (TestCpuFlag(kCpuHasNEON)) {
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CopyRow = IS_ALIGNED(width * 4, 32) ? CopyRow_NEON : CopyRow_Any_NEON;
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}
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#endif
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// Odd height will harmlessly mirror the middle row twice.
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for (y = 0; y < half_height; ++y) {
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ARGBMirrorRow(src_argb, row, width); // Mirror first row into a buffer
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ARGBMirrorRow(src_bot, dst_argb, width); // Mirror last row into first row
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CopyRow(row, dst_bot, width * 4); // Copy first mirrored row into last
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src_argb += src_stride_argb;
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dst_argb += dst_stride_argb;
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src_bot -= src_stride_argb;
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dst_bot -= dst_stride_argb;
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}
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free_aligned_buffer_64(row);
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}
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LIBYUV_API
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int ARGBRotate(const uint8_t* src_argb,
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int src_stride_argb,
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uint8_t* dst_argb,
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int dst_stride_argb,
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int width,
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int height,
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enum RotationMode mode) {
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if (!src_argb || width <= 0 || height == 0 || !dst_argb) {
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return -1;
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}
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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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src_argb = src_argb + (height - 1) * src_stride_argb;
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src_stride_argb = -src_stride_argb;
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}
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switch (mode) {
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case kRotate0:
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// copy frame
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return ARGBCopy(src_argb, src_stride_argb, dst_argb, dst_stride_argb,
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width, height);
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case kRotate90:
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ARGBRotate90(src_argb, src_stride_argb, dst_argb, dst_stride_argb, width,
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height);
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return 0;
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case kRotate270:
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ARGBRotate270(src_argb, src_stride_argb, dst_argb, dst_stride_argb, width,
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height);
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return 0;
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case kRotate180:
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ARGBRotate180(src_argb, src_stride_argb, dst_argb, dst_stride_argb, width,
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height);
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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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#ifdef __cplusplus
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} // extern "C"
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} // namespace libyuv
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#endif
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