ref: 6d225eb5f972f6a0d7b6eac7df652f5b664e2b31
dir: /third_party/libyuv/source/rotate_argb.cc/
/* * Copyright 2012 The LibYuv 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 "libyuv/rotate.h" #include "libyuv/cpu_id.h" #include "libyuv/convert.h" #include "libyuv/planar_functions.h" #include "libyuv/row.h" #ifdef __cplusplus namespace libyuv { extern "C" { #endif // ARGBScale has a function to copy pixels to a row, striding each source // pixel by a constant. #if !defined(LIBYUV_DISABLE_X86) && \ (defined(_M_IX86) || \ (defined(__x86_64__) && !defined(__native_client__)) || defined(__i386__)) #define HAS_SCALEARGBROWDOWNEVEN_SSE2 void ScaleARGBRowDownEven_SSE2(const uint8* src_ptr, int src_stride, int src_stepx, uint8* dst_ptr, int dst_width); #endif #if !defined(LIBYUV_DISABLE_NEON) && !defined(__native_client__) && \ (defined(__ARM_NEON__) || defined(LIBYUV_NEON) || defined(__aarch64__)) #define HAS_SCALEARGBROWDOWNEVEN_NEON void ScaleARGBRowDownEven_NEON(const uint8* src_ptr, int src_stride, int src_stepx, uint8* dst_ptr, int dst_width); #endif void ScaleARGBRowDownEven_C(const uint8* src_ptr, int, int src_stepx, uint8* dst_ptr, int dst_width); static void ARGBTranspose(const uint8* src, int src_stride, uint8* dst, int dst_stride, int width, int height) { int i; int src_pixel_step = src_stride >> 2; void (*ScaleARGBRowDownEven)(const uint8* src_ptr, int src_stride, int src_step, uint8* dst_ptr, int dst_width) = ScaleARGBRowDownEven_C; #if defined(HAS_SCALEARGBROWDOWNEVEN_SSE2) if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(height, 4)) { // Width of dest. ScaleARGBRowDownEven = ScaleARGBRowDownEven_SSE2; } #endif #if defined(HAS_SCALEARGBROWDOWNEVEN_NEON) if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(height, 4)) { // Width of dest. ScaleARGBRowDownEven = ScaleARGBRowDownEven_NEON; } #endif for (i = 0; i < width; ++i) { // column of source to row of dest. ScaleARGBRowDownEven(src, 0, src_pixel_step, dst, height); dst += dst_stride; src += 4; } } void ARGBRotate90(const uint8* src, int src_stride, uint8* dst, int dst_stride, int width, int height) { // Rotate by 90 is a ARGBTranspose with the source read // from bottom to top. So set the source pointer to the end // of the buffer and flip the sign of the source stride. src += src_stride * (height - 1); src_stride = -src_stride; ARGBTranspose(src, src_stride, dst, dst_stride, width, height); } void ARGBRotate270(const uint8* src, int src_stride, uint8* dst, int dst_stride, int width, int height) { // Rotate by 270 is a ARGBTranspose with the destination written // from bottom to top. So set the destination pointer to the end // of the buffer and flip the sign of the destination stride. dst += dst_stride * (width - 1); dst_stride = -dst_stride; ARGBTranspose(src, src_stride, dst, dst_stride, width, height); } void ARGBRotate180(const uint8* src, int src_stride, uint8* dst, int dst_stride, int width, int height) { // Swap first and last row and mirror the content. Uses a temporary row. align_buffer_64(row, width * 4); const uint8* src_bot = src + src_stride * (height - 1); uint8* dst_bot = dst + dst_stride * (height - 1); int half_height = (height + 1) >> 1; int y; void (*ARGBMirrorRow)(const uint8* src, uint8* dst, int width) = ARGBMirrorRow_C; void (*CopyRow)(const uint8* src, uint8* dst, int width) = CopyRow_C; #if defined(HAS_ARGBMIRRORROW_NEON) if (TestCpuFlag(kCpuHasNEON)) { ARGBMirrorRow = ARGBMirrorRow_Any_NEON; if (IS_ALIGNED(width, 4)) { ARGBMirrorRow = ARGBMirrorRow_NEON; } } #endif #if defined(HAS_ARGBMIRRORROW_SSE2) if (TestCpuFlag(kCpuHasSSE2)) { ARGBMirrorRow = ARGBMirrorRow_Any_SSE2; if (IS_ALIGNED(width, 4)) { ARGBMirrorRow = ARGBMirrorRow_SSE2; } } #endif #if defined(HAS_ARGBMIRRORROW_AVX2) if (TestCpuFlag(kCpuHasAVX2)) { ARGBMirrorRow = ARGBMirrorRow_Any_AVX2; if (IS_ALIGNED(width, 8)) { ARGBMirrorRow = ARGBMirrorRow_AVX2; } } #endif #if defined(HAS_COPYROW_SSE2) if (TestCpuFlag(kCpuHasSSE2)) { CopyRow = IS_ALIGNED(width * 4, 32) ? CopyRow_SSE2 : CopyRow_Any_SSE2; } #endif #if defined(HAS_COPYROW_AVX) if (TestCpuFlag(kCpuHasAVX)) { CopyRow = IS_ALIGNED(width * 4, 64) ? CopyRow_AVX : CopyRow_Any_AVX; } #endif #if defined(HAS_COPYROW_ERMS) if (TestCpuFlag(kCpuHasERMS)) { CopyRow = CopyRow_ERMS; } #endif #if defined(HAS_COPYROW_NEON) if (TestCpuFlag(kCpuHasNEON)) { CopyRow = IS_ALIGNED(width * 4, 32) ? CopyRow_NEON : CopyRow_Any_NEON; } #endif #if defined(HAS_COPYROW_MIPS) if (TestCpuFlag(kCpuHasMIPS)) { CopyRow = CopyRow_MIPS; } #endif // Odd height will harmlessly mirror the middle row twice. for (y = 0; y < half_height; ++y) { ARGBMirrorRow(src, row, width); // Mirror first row into a buffer ARGBMirrorRow(src_bot, dst, width); // Mirror last row into first row CopyRow(row, dst_bot, width * 4); // Copy first mirrored row into last src += src_stride; dst += dst_stride; src_bot -= src_stride; dst_bot -= dst_stride; } free_aligned_buffer_64(row); } LIBYUV_API int ARGBRotate(const uint8* src_argb, int src_stride_argb, uint8* dst_argb, int dst_stride_argb, int width, int height, enum RotationMode mode) { if (!src_argb || width <= 0 || height == 0 || !dst_argb) { return -1; } // Negative height means invert the image. if (height < 0) { height = -height; src_argb = src_argb + (height - 1) * src_stride_argb; src_stride_argb = -src_stride_argb; } switch (mode) { case kRotate0: // copy frame return ARGBCopy(src_argb, src_stride_argb, dst_argb, dst_stride_argb, width, height); case kRotate90: ARGBRotate90(src_argb, src_stride_argb, dst_argb, dst_stride_argb, width, height); return 0; case kRotate270: ARGBRotate270(src_argb, src_stride_argb, dst_argb, dst_stride_argb, width, height); return 0; case kRotate180: ARGBRotate180(src_argb, src_stride_argb, dst_argb, dst_stride_argb, width, height); return 0; default: break; } return -1; } #ifdef __cplusplus } // extern "C" } // namespace libyuv #endif