The Tor Browser: media/libyuv/source/planar_functions.cc@6474c204b198 (annotated)

media/libyuv/source/planar_functions.cc@6474c204b198 (annotated)

media/libyuv/source/planar_functions.cc

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  *  Copyright 2011 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/planar_functions.h"
 #include <string.h>  // for memset()
 #include "libyuv/cpu_id.h"
 #ifdef HAVE_JPEG
 #include "libyuv/mjpeg_decoder.h"
 #endif
 #include "libyuv/row.h"
 #ifdef __cplusplus
 namespace libyuv {
 extern "C" {
 #endif
 // Copy a plane of data
 LIBYUV_API
 void CopyPlane(const uint8* src_y, int src_stride_y,
                uint8* dst_y, int dst_stride_y,
                int width, int height) {
   int y;
   void (*CopyRow)(const uint8* src, uint8* dst, int width) = CopyRow_C;
   // Coalesce rows.
   if (src_stride_y == width &&
       dst_stride_y == width) {
     width *= height;
     height = 1;
     src_stride_y = dst_stride_y = 0;
   }
 #if defined(HAS_COPYROW_X86)
   if (TestCpuFlag(kCpuHasX86) && IS_ALIGNED(width, 4)) {
     CopyRow = CopyRow_X86;
   }
 #endif
 #if defined(HAS_COPYROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(width, 32) &&
       IS_ALIGNED(src_y, 16) && IS_ALIGNED(src_stride_y, 16) &&
       IS_ALIGNED(dst_y, 16) && IS_ALIGNED(dst_stride_y, 16)) {
     CopyRow = CopyRow_SSE2;
   }
 #endif
 #if defined(HAS_COPYROW_ERMS)
   if (TestCpuFlag(kCpuHasERMS)) {
     CopyRow = CopyRow_ERMS;
   }
 #endif
 #if defined(HAS_COPYROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 32)) {
     CopyRow = CopyRow_NEON;
   }
 #endif
 #if defined(HAS_COPYROW_MIPS)
   if (TestCpuFlag(kCpuHasMIPS)) {
     CopyRow = CopyRow_MIPS;
   }
 #endif
   // Copy plane
   for (y = 0; y < height; ++y) {
     CopyRow(src_y, dst_y, width);
     src_y += src_stride_y;
     dst_y += dst_stride_y;
   }
 }
 // Copy I422.
 LIBYUV_API
 int I422Copy(const uint8* src_y, int src_stride_y,
              const uint8* src_u, int src_stride_u,
              const uint8* src_v, int src_stride_v,
              uint8* dst_y, int dst_stride_y,
              uint8* dst_u, int dst_stride_u,
              uint8* dst_v, int dst_stride_v,
              int width, int height) {
   int halfwidth = (width + 1) >> 1;
   if (!src_y || !src_u || !src_v ||
       !dst_y || !dst_u || !dst_v ||
       width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     src_y = src_y + (height - 1) * src_stride_y;
     src_u = src_u + (height - 1) * src_stride_u;
     src_v = src_v + (height - 1) * src_stride_v;
     src_stride_y = -src_stride_y;
     src_stride_u = -src_stride_u;
     src_stride_v = -src_stride_v;
   }
   CopyPlane(src_y, src_stride_y, dst_y, dst_stride_y, width, height);
   CopyPlane(src_u, src_stride_u, dst_u, dst_stride_u, halfwidth, height);
   CopyPlane(src_v, src_stride_v, dst_v, dst_stride_v, halfwidth, height);
   return 0;
 }
 // Copy I444.
 LIBYUV_API
 int I444Copy(const uint8* src_y, int src_stride_y,
              const uint8* src_u, int src_stride_u,
              const uint8* src_v, int src_stride_v,
              uint8* dst_y, int dst_stride_y,
              uint8* dst_u, int dst_stride_u,
              uint8* dst_v, int dst_stride_v,
              int width, int height) {
   if (!src_y || !src_u || !src_v ||
       !dst_y || !dst_u || !dst_v ||
       width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     src_y = src_y + (height - 1) * src_stride_y;
     src_u = src_u + (height - 1) * src_stride_u;
     src_v = src_v + (height - 1) * src_stride_v;
     src_stride_y = -src_stride_y;
     src_stride_u = -src_stride_u;
     src_stride_v = -src_stride_v;
   }
   CopyPlane(src_y, src_stride_y, dst_y, dst_stride_y, width, height);
   CopyPlane(src_u, src_stride_u, dst_u, dst_stride_u, width, height);
   CopyPlane(src_v, src_stride_v, dst_v, dst_stride_v, width, height);
   return 0;
 }
 // Copy I400.
 LIBYUV_API
 int I400ToI400(const uint8* src_y, int src_stride_y,
                uint8* dst_y, int dst_stride_y,
                int width, int height) {
   if (!src_y || !dst_y || width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     src_y = src_y + (height - 1) * src_stride_y;
     src_stride_y = -src_stride_y;
   }
   CopyPlane(src_y, src_stride_y, dst_y, dst_stride_y, width, height);
   return 0;
 }
 // Convert I420 to I400.
 LIBYUV_API
 int I420ToI400(const uint8* src_y, int src_stride_y,
                const uint8* src_u, int src_stride_u,
                const uint8* src_v, int src_stride_v,
                uint8* dst_y, int dst_stride_y,
                int width, int height) {
   if (!src_y || !dst_y || width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     src_y = src_y + (height - 1) * src_stride_y;
     src_stride_y = -src_stride_y;
   }
   CopyPlane(src_y, src_stride_y, dst_y, dst_stride_y, width, height);
   return 0;
 }
 // Mirror a plane of data.
 void MirrorPlane(const uint8* src_y, int src_stride_y,
                  uint8* dst_y, int dst_stride_y,
                  int width, int height) {
   int y;
   void (*MirrorRow)(const uint8* src, uint8* dst, int width) = MirrorRow_C;
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     src_y = src_y + (height - 1) * src_stride_y;
     src_stride_y = -src_stride_y;
   }
 #if defined(HAS_MIRRORROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 16)) {
     MirrorRow = MirrorRow_NEON;
   }
 #endif
 #if defined(HAS_MIRRORROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(width, 16)) {
     MirrorRow = MirrorRow_SSE2;
   }
 #endif
 #if defined(HAS_MIRRORROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && IS_ALIGNED(width, 16) &&
       IS_ALIGNED(src_y, 16) && IS_ALIGNED(src_stride_y, 16) &&
       IS_ALIGNED(dst_y, 16) && IS_ALIGNED(dst_stride_y, 16)) {
     MirrorRow = MirrorRow_SSSE3;
   }
 #endif
 #if defined(HAS_MIRRORROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && IS_ALIGNED(width, 32)) {
     MirrorRow = MirrorRow_AVX2;
   }
 #endif
   // Mirror plane
   for (y = 0; y < height; ++y) {
     MirrorRow(src_y, dst_y, width);
     src_y += src_stride_y;
     dst_y += dst_stride_y;
   }
 }
 // Convert YUY2 to I422.
 LIBYUV_API
 int YUY2ToI422(const uint8* src_yuy2, int src_stride_yuy2,
                uint8* dst_y, int dst_stride_y,
                uint8* dst_u, int dst_stride_u,
                uint8* dst_v, int dst_stride_v,
                int width, int height) {
   int y;
   void (*YUY2ToUV422Row)(const uint8* src_yuy2,
                          uint8* dst_u, uint8* dst_v, int pix) =
       YUY2ToUV422Row_C;
   void (*YUY2ToYRow)(const uint8* src_yuy2, uint8* dst_y, int pix) =
       YUY2ToYRow_C;
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     src_yuy2 = src_yuy2 + (height - 1) * src_stride_yuy2;
     src_stride_yuy2 = -src_stride_yuy2;
   }
   // Coalesce rows.
   if (src_stride_yuy2 == width * 2 &&
       dst_stride_y == width &&
       dst_stride_u * 2 == width &&
       dst_stride_v * 2 == width) {
     width *= height;
     height = 1;
     src_stride_yuy2 = dst_stride_y = dst_stride_u = dst_stride_v = 0;
   }
 #if defined(HAS_YUY2TOYROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && width >= 16) {
     YUY2ToUV422Row = YUY2ToUV422Row_Any_SSE2;
     YUY2ToYRow = YUY2ToYRow_Any_SSE2;
     if (IS_ALIGNED(width, 16)) {
       YUY2ToUV422Row = YUY2ToUV422Row_Unaligned_SSE2;
       YUY2ToYRow = YUY2ToYRow_Unaligned_SSE2;
       if (IS_ALIGNED(src_yuy2, 16) && IS_ALIGNED(src_stride_yuy2, 16)) {
         YUY2ToUV422Row = YUY2ToUV422Row_SSE2;
         if (IS_ALIGNED(dst_y, 16) && IS_ALIGNED(dst_stride_y, 16)) {
           YUY2ToYRow = YUY2ToYRow_SSE2;
         }
       }
     }
   }
 #endif
 #if defined(HAS_YUY2TOYROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && width >= 32) {
     YUY2ToUV422Row = YUY2ToUV422Row_Any_AVX2;
     YUY2ToYRow = YUY2ToYRow_Any_AVX2;
     if (IS_ALIGNED(width, 32)) {
       YUY2ToUV422Row = YUY2ToUV422Row_AVX2;
       YUY2ToYRow = YUY2ToYRow_AVX2;
     }
   }
 #endif
 #if defined(HAS_YUY2TOYROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
     YUY2ToYRow = YUY2ToYRow_Any_NEON;
     if (width >= 16) {
       YUY2ToUV422Row = YUY2ToUV422Row_Any_NEON;
     }
     if (IS_ALIGNED(width, 16)) {
       YUY2ToYRow = YUY2ToYRow_NEON;
       YUY2ToUV422Row = YUY2ToUV422Row_NEON;
     }
   }
 #endif
   for (y = 0; y < height; ++y) {
     YUY2ToUV422Row(src_yuy2, dst_u, dst_v, width);
     YUY2ToYRow(src_yuy2, dst_y, width);
     src_yuy2 += src_stride_yuy2;
     dst_y += dst_stride_y;
     dst_u += dst_stride_u;
     dst_v += dst_stride_v;
   }
   return 0;
 }
 // Convert UYVY to I422.
 LIBYUV_API
 int UYVYToI422(const uint8* src_uyvy, int src_stride_uyvy,
                uint8* dst_y, int dst_stride_y,
                uint8* dst_u, int dst_stride_u,
                uint8* dst_v, int dst_stride_v,
                int width, int height) {
   int y;
   void (*UYVYToUV422Row)(const uint8* src_uyvy,
                          uint8* dst_u, uint8* dst_v, int pix) =
       UYVYToUV422Row_C;
   void (*UYVYToYRow)(const uint8* src_uyvy,
                      uint8* dst_y, int pix) = UYVYToYRow_C;
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     src_uyvy = src_uyvy + (height - 1) * src_stride_uyvy;
     src_stride_uyvy = -src_stride_uyvy;
   }
   // Coalesce rows.
   if (src_stride_uyvy == width * 2 &&
       dst_stride_y == width &&
       dst_stride_u * 2 == width &&
       dst_stride_v * 2 == width) {
     width *= height;
     height = 1;
     src_stride_uyvy = dst_stride_y = dst_stride_u = dst_stride_v = 0;
   }
 #if defined(HAS_UYVYTOYROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && width >= 16) {
     UYVYToUV422Row = UYVYToUV422Row_Any_SSE2;
     UYVYToYRow = UYVYToYRow_Any_SSE2;
     if (IS_ALIGNED(width, 16)) {
       UYVYToUV422Row = UYVYToUV422Row_Unaligned_SSE2;
       UYVYToYRow = UYVYToYRow_Unaligned_SSE2;
       if (IS_ALIGNED(src_uyvy, 16) && IS_ALIGNED(src_stride_uyvy, 16)) {
         UYVYToUV422Row = UYVYToUV422Row_SSE2;
         if (IS_ALIGNED(dst_y, 16) && IS_ALIGNED(dst_stride_y, 16)) {
           UYVYToYRow = UYVYToYRow_SSE2;
         }
       }
     }
   }
 #endif
 #if defined(HAS_UYVYTOYROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && width >= 32) {
     UYVYToUV422Row = UYVYToUV422Row_Any_AVX2;
     UYVYToYRow = UYVYToYRow_Any_AVX2;
     if (IS_ALIGNED(width, 32)) {
       UYVYToUV422Row = UYVYToUV422Row_AVX2;
       UYVYToYRow = UYVYToYRow_AVX2;
     }
   }
 #endif
 #if defined(HAS_UYVYTOYROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
     UYVYToYRow = UYVYToYRow_Any_NEON;
     if (width >= 16) {
       UYVYToUV422Row = UYVYToUV422Row_Any_NEON;
     }
     if (IS_ALIGNED(width, 16)) {
       UYVYToYRow = UYVYToYRow_NEON;
       UYVYToUV422Row = UYVYToUV422Row_NEON;
     }
   }
 #endif
   for (y = 0; y < height; ++y) {
     UYVYToUV422Row(src_uyvy, dst_u, dst_v, width);
     UYVYToYRow(src_uyvy, dst_y, width);
     src_uyvy += src_stride_uyvy;
     dst_y += dst_stride_y;
     dst_u += dst_stride_u;
     dst_v += dst_stride_v;
   }
   return 0;
 }
 // Mirror I400 with optional flipping
 LIBYUV_API
 int I400Mirror(const uint8* src_y, int src_stride_y,
                uint8* dst_y, int dst_stride_y,
                int width, int height) {
   if (!src_y || !dst_y ||
       width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     src_y = src_y + (height - 1) * src_stride_y;
     src_stride_y = -src_stride_y;
   }
   MirrorPlane(src_y, src_stride_y, dst_y, dst_stride_y, width, height);
   return 0;
 }
 // Mirror I420 with optional flipping
 LIBYUV_API
 int I420Mirror(const uint8* src_y, int src_stride_y,
                const uint8* src_u, int src_stride_u,
                const uint8* src_v, int src_stride_v,
                uint8* dst_y, int dst_stride_y,
                uint8* dst_u, int dst_stride_u,
                uint8* dst_v, int dst_stride_v,
                int width, int height) {
   int halfwidth = (width + 1) >> 1;
   int halfheight = (height + 1) >> 1;
   if (!src_y || !src_u || !src_v || !dst_y || !dst_u || !dst_v ||
       width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     halfheight = (height + 1) >> 1;
     src_y = src_y + (height - 1) * src_stride_y;
     src_u = src_u + (halfheight - 1) * src_stride_u;
     src_v = src_v + (halfheight - 1) * src_stride_v;
     src_stride_y = -src_stride_y;
     src_stride_u = -src_stride_u;
     src_stride_v = -src_stride_v;
   }
   if (dst_y) {
     MirrorPlane(src_y, src_stride_y, dst_y, dst_stride_y, width, height);
   }
   MirrorPlane(src_u, src_stride_u, dst_u, dst_stride_u, halfwidth, halfheight);
   MirrorPlane(src_v, src_stride_v, dst_v, dst_stride_v, halfwidth, halfheight);
   return 0;
 }
 // ARGB mirror.
 LIBYUV_API
 int ARGBMirror(const uint8* src_argb, int src_stride_argb,
                uint8* dst_argb, int dst_stride_argb,
                int width, int height) {
   int y;
   void (*ARGBMirrorRow)(const uint8* src, uint8* dst, int width) =
       ARGBMirrorRow_C;
   if (!src_argb || !dst_argb || width <= 0 || height == 0) {
     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;
   }
 #if defined(HAS_ARGBMIRRORROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && IS_ALIGNED(width, 4) &&
       IS_ALIGNED(src_argb, 16) && IS_ALIGNED(src_stride_argb, 16) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
     ARGBMirrorRow = ARGBMirrorRow_SSSE3;
   }
 #endif
 #if defined(HAS_ARGBMIRRORROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && IS_ALIGNED(width, 8)) {
     ARGBMirrorRow = ARGBMirrorRow_AVX2;
   }
 #endif
 #if defined(HAS_ARGBMIRRORROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 4)) {
     ARGBMirrorRow = ARGBMirrorRow_NEON;
   }
 #endif
   // Mirror plane
   for (y = 0; y < height; ++y) {
     ARGBMirrorRow(src_argb, dst_argb, width);
     src_argb += src_stride_argb;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Get a blender that optimized for the CPU, alignment and pixel count.
 // As there are 6 blenders to choose from, the caller should try to use
 // the same blend function for all pixels if possible.
 LIBYUV_API
 ARGBBlendRow GetARGBBlend() {
   void (*ARGBBlendRow)(const uint8* src_argb, const uint8* src_argb1,
                        uint8* dst_argb, int width) = ARGBBlendRow_C;
 #if defined(HAS_ARGBBLENDROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3)) {
     ARGBBlendRow = ARGBBlendRow_SSSE3;
     return ARGBBlendRow;
   }
 #endif
 #if defined(HAS_ARGBBLENDROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2)) {
     ARGBBlendRow = ARGBBlendRow_SSE2;
   }
 #endif
 #if defined(HAS_ARGBBLENDROW_NEON)
   if (TestCpuFlag(kCpuHasNEON)) {
     ARGBBlendRow = ARGBBlendRow_NEON;
   }
 #endif
   return ARGBBlendRow;
 }
 // Alpha Blend 2 ARGB images and store to destination.
 LIBYUV_API
 int ARGBBlend(const uint8* src_argb0, int src_stride_argb0,
               const uint8* src_argb1, int src_stride_argb1,
               uint8* dst_argb, int dst_stride_argb,
               int width, int height) {
   int y;
   void (*ARGBBlendRow)(const uint8* src_argb, const uint8* src_argb1,
                        uint8* dst_argb, int width) = GetARGBBlend();
   if (!src_argb0 || !src_argb1 || !dst_argb || width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     dst_argb = dst_argb + (height - 1) * dst_stride_argb;
     dst_stride_argb = -dst_stride_argb;
   }
   // Coalesce rows.
   if (src_stride_argb0 == width * 4 &&
       src_stride_argb1 == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb0 = src_stride_argb1 = dst_stride_argb = 0;
   }
   for (y = 0; y < height; ++y) {
     ARGBBlendRow(src_argb0, src_argb1, dst_argb, width);
     src_argb0 += src_stride_argb0;
     src_argb1 += src_stride_argb1;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Multiply 2 ARGB images and store to destination.
 LIBYUV_API
 int ARGBMultiply(const uint8* src_argb0, int src_stride_argb0,
                  const uint8* src_argb1, int src_stride_argb1,
                  uint8* dst_argb, int dst_stride_argb,
                  int width, int height) {
   int y;
   void (*ARGBMultiplyRow)(const uint8* src0, const uint8* src1, uint8* dst,
                           int width) = ARGBMultiplyRow_C;
   if (!src_argb0 || !src_argb1 || !dst_argb || width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     dst_argb = dst_argb + (height - 1) * dst_stride_argb;
     dst_stride_argb = -dst_stride_argb;
   }
   // Coalesce rows.
   if (src_stride_argb0 == width * 4 &&
       src_stride_argb1 == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb0 = src_stride_argb1 = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBMULTIPLYROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && width >= 4) {
     ARGBMultiplyRow = ARGBMultiplyRow_Any_SSE2;
     if (IS_ALIGNED(width, 4)) {
       ARGBMultiplyRow = ARGBMultiplyRow_SSE2;
     }
   }
 #endif
 #if defined(HAS_ARGBMULTIPLYROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && width >= 8) {
     ARGBMultiplyRow = ARGBMultiplyRow_Any_AVX2;
     if (IS_ALIGNED(width, 8)) {
       ARGBMultiplyRow = ARGBMultiplyRow_AVX2;
     }
   }
 #endif
 #if defined(HAS_ARGBMULTIPLYROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
     ARGBMultiplyRow = ARGBMultiplyRow_Any_NEON;
     if (IS_ALIGNED(width, 8)) {
       ARGBMultiplyRow = ARGBMultiplyRow_NEON;
     }
   }
 #endif
   // Multiply plane
   for (y = 0; y < height; ++y) {
     ARGBMultiplyRow(src_argb0, src_argb1, dst_argb, width);
     src_argb0 += src_stride_argb0;
     src_argb1 += src_stride_argb1;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Add 2 ARGB images and store to destination.
 LIBYUV_API
 int ARGBAdd(const uint8* src_argb0, int src_stride_argb0,
             const uint8* src_argb1, int src_stride_argb1,
             uint8* dst_argb, int dst_stride_argb,
             int width, int height) {
   int y;
   void (*ARGBAddRow)(const uint8* src0, const uint8* src1, uint8* dst,
                      int width) = ARGBAddRow_C;
   if (!src_argb0 || !src_argb1 || !dst_argb || width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     dst_argb = dst_argb + (height - 1) * dst_stride_argb;
     dst_stride_argb = -dst_stride_argb;
   }
   // Coalesce rows.
   if (src_stride_argb0 == width * 4 &&
       src_stride_argb1 == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb0 = src_stride_argb1 = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBADDROW_SSE2) && defined(_MSC_VER)
   if (TestCpuFlag(kCpuHasSSE2)) {
     ARGBAddRow = ARGBAddRow_SSE2;
   }
 #endif
 #if defined(HAS_ARGBADDROW_SSE2) && !defined(_MSC_VER)
   if (TestCpuFlag(kCpuHasSSE2) && width >= 4) {
     ARGBAddRow = ARGBAddRow_Any_SSE2;
     if (IS_ALIGNED(width, 4)) {
       ARGBAddRow = ARGBAddRow_SSE2;
     }
   }
 #endif
 #if defined(HAS_ARGBADDROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && width >= 8) {
     ARGBAddRow = ARGBAddRow_Any_AVX2;
     if (IS_ALIGNED(width, 8)) {
       ARGBAddRow = ARGBAddRow_AVX2;
     }
   }
 #endif
 #if defined(HAS_ARGBADDROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
     ARGBAddRow = ARGBAddRow_Any_NEON;
     if (IS_ALIGNED(width, 8)) {
       ARGBAddRow = ARGBAddRow_NEON;
     }
   }
 #endif
   // Add plane
   for (y = 0; y < height; ++y) {
     ARGBAddRow(src_argb0, src_argb1, dst_argb, width);
     src_argb0 += src_stride_argb0;
     src_argb1 += src_stride_argb1;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Subtract 2 ARGB images and store to destination.
 LIBYUV_API
 int ARGBSubtract(const uint8* src_argb0, int src_stride_argb0,
                  const uint8* src_argb1, int src_stride_argb1,
                  uint8* dst_argb, int dst_stride_argb,
                  int width, int height) {
   int y;
   void (*ARGBSubtractRow)(const uint8* src0, const uint8* src1, uint8* dst,
                           int width) = ARGBSubtractRow_C;
   if (!src_argb0 || !src_argb1 || !dst_argb || width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     dst_argb = dst_argb + (height - 1) * dst_stride_argb;
     dst_stride_argb = -dst_stride_argb;
   }
   // Coalesce rows.
   if (src_stride_argb0 == width * 4 &&
       src_stride_argb1 == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb0 = src_stride_argb1 = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBSUBTRACTROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && width >= 4) {
     ARGBSubtractRow = ARGBSubtractRow_Any_SSE2;
     if (IS_ALIGNED(width, 4)) {
       ARGBSubtractRow = ARGBSubtractRow_SSE2;
     }
   }
 #endif
 #if defined(HAS_ARGBSUBTRACTROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && width >= 8) {
     ARGBSubtractRow = ARGBSubtractRow_Any_AVX2;
     if (IS_ALIGNED(width, 8)) {
       ARGBSubtractRow = ARGBSubtractRow_AVX2;
     }
   }
 #endif
 #if defined(HAS_ARGBSUBTRACTROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
     ARGBSubtractRow = ARGBSubtractRow_Any_NEON;
     if (IS_ALIGNED(width, 8)) {
       ARGBSubtractRow = ARGBSubtractRow_NEON;
     }
   }
 #endif
   // Subtract plane
   for (y = 0; y < height; ++y) {
     ARGBSubtractRow(src_argb0, src_argb1, dst_argb, width);
     src_argb0 += src_stride_argb0;
     src_argb1 += src_stride_argb1;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Convert I422 to BGRA.
 LIBYUV_API
 int I422ToBGRA(const uint8* src_y, int src_stride_y,
                const uint8* src_u, int src_stride_u,
                const uint8* src_v, int src_stride_v,
                uint8* dst_bgra, int dst_stride_bgra,
                int width, int height) {
   int y;
   void (*I422ToBGRARow)(const uint8* y_buf,
                         const uint8* u_buf,
                         const uint8* v_buf,
                         uint8* rgb_buf,
                         int width) = I422ToBGRARow_C;
   if (!src_y || !src_u || !src_v ||
       !dst_bgra ||
       width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     dst_bgra = dst_bgra + (height - 1) * dst_stride_bgra;
     dst_stride_bgra = -dst_stride_bgra;
   }
   // Coalesce rows.
   if (src_stride_y == width &&
       src_stride_u * 2 == width &&
       src_stride_v * 2 == width &&
       dst_stride_bgra == width * 4) {
     width *= height;
     height = 1;
     src_stride_y = src_stride_u = src_stride_v = dst_stride_bgra = 0;
   }
 #if defined(HAS_I422TOBGRAROW_NEON)
   if (TestCpuFlag(kCpuHasNEON)) {
     I422ToBGRARow = I422ToBGRARow_Any_NEON;
     if (IS_ALIGNED(width, 16)) {
       I422ToBGRARow = I422ToBGRARow_NEON;
     }
   }
 #elif defined(HAS_I422TOBGRAROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && width >= 8) {
     I422ToBGRARow = I422ToBGRARow_Any_SSSE3;
     if (IS_ALIGNED(width, 8)) {
       I422ToBGRARow = I422ToBGRARow_Unaligned_SSSE3;
       if (IS_ALIGNED(dst_bgra, 16) && IS_ALIGNED(dst_stride_bgra, 16)) {
         I422ToBGRARow = I422ToBGRARow_SSSE3;
       }
     }
   }
 #elif defined(HAS_I422TOBGRAROW_MIPS_DSPR2)
   if (TestCpuFlag(kCpuHasMIPS_DSPR2) && IS_ALIGNED(width, 4) &&
       IS_ALIGNED(src_y, 4) && IS_ALIGNED(src_stride_y, 4) &&
       IS_ALIGNED(src_u, 2) && IS_ALIGNED(src_stride_u, 2) &&
       IS_ALIGNED(src_v, 2) && IS_ALIGNED(src_stride_v, 2) &&
       IS_ALIGNED(dst_bgra, 4) && IS_ALIGNED(dst_stride_bgra, 4)) {
     I422ToBGRARow = I422ToBGRARow_MIPS_DSPR2;
   }
 #endif
   for (y = 0; y < height; ++y) {
     I422ToBGRARow(src_y, src_u, src_v, dst_bgra, width);
     dst_bgra += dst_stride_bgra;
     src_y += src_stride_y;
     src_u += src_stride_u;
     src_v += src_stride_v;
   }
   return 0;
 }
 // Convert I422 to ABGR.
 LIBYUV_API
 int I422ToABGR(const uint8* src_y, int src_stride_y,
                const uint8* src_u, int src_stride_u,
                const uint8* src_v, int src_stride_v,
                uint8* dst_abgr, int dst_stride_abgr,
                int width, int height) {
   int y;
   void (*I422ToABGRRow)(const uint8* y_buf,
                         const uint8* u_buf,
                         const uint8* v_buf,
                         uint8* rgb_buf,
                         int width) = I422ToABGRRow_C;
   if (!src_y || !src_u || !src_v ||
       !dst_abgr ||
       width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     dst_abgr = dst_abgr + (height - 1) * dst_stride_abgr;
     dst_stride_abgr = -dst_stride_abgr;
   }
   // Coalesce rows.
   if (src_stride_y == width &&
       src_stride_u * 2 == width &&
       src_stride_v * 2 == width &&
       dst_stride_abgr == width * 4) {
     width *= height;
     height = 1;
     src_stride_y = src_stride_u = src_stride_v = dst_stride_abgr = 0;
   }
 #if defined(HAS_I422TOABGRROW_NEON)
   if (TestCpuFlag(kCpuHasNEON)) {
     I422ToABGRRow = I422ToABGRRow_Any_NEON;
     if (IS_ALIGNED(width, 16)) {
       I422ToABGRRow = I422ToABGRRow_NEON;
     }
   }
 #elif defined(HAS_I422TOABGRROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && width >= 8) {
     I422ToABGRRow = I422ToABGRRow_Any_SSSE3;
     if (IS_ALIGNED(width, 8)) {
       I422ToABGRRow = I422ToABGRRow_Unaligned_SSSE3;
       if (IS_ALIGNED(dst_abgr, 16) && IS_ALIGNED(dst_stride_abgr, 16)) {
         I422ToABGRRow = I422ToABGRRow_SSSE3;
       }
     }
   }
 #endif
   for (y = 0; y < height; ++y) {
     I422ToABGRRow(src_y, src_u, src_v, dst_abgr, width);
     dst_abgr += dst_stride_abgr;
     src_y += src_stride_y;
     src_u += src_stride_u;
     src_v += src_stride_v;
   }
   return 0;
 }
 // Convert I422 to RGBA.
 LIBYUV_API
 int I422ToRGBA(const uint8* src_y, int src_stride_y,
                const uint8* src_u, int src_stride_u,
                const uint8* src_v, int src_stride_v,
                uint8* dst_rgba, int dst_stride_rgba,
                int width, int height) {
   int y;
   void (*I422ToRGBARow)(const uint8* y_buf,
                         const uint8* u_buf,
                         const uint8* v_buf,
                         uint8* rgb_buf,
                         int width) = I422ToRGBARow_C;
   if (!src_y || !src_u || !src_v ||
       !dst_rgba ||
       width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     dst_rgba = dst_rgba + (height - 1) * dst_stride_rgba;
     dst_stride_rgba = -dst_stride_rgba;
   }
   // Coalesce rows.
   if (src_stride_y == width &&
       src_stride_u * 2 == width &&
       src_stride_v * 2 == width &&
       dst_stride_rgba == width * 4) {
     width *= height;
     height = 1;
     src_stride_y = src_stride_u = src_stride_v = dst_stride_rgba = 0;
   }
 #if defined(HAS_I422TORGBAROW_NEON)
   if (TestCpuFlag(kCpuHasNEON)) {
     I422ToRGBARow = I422ToRGBARow_Any_NEON;
     if (IS_ALIGNED(width, 16)) {
       I422ToRGBARow = I422ToRGBARow_NEON;
     }
   }
 #elif defined(HAS_I422TORGBAROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && width >= 8) {
     I422ToRGBARow = I422ToRGBARow_Any_SSSE3;
     if (IS_ALIGNED(width, 8)) {
       I422ToRGBARow = I422ToRGBARow_Unaligned_SSSE3;
       if (IS_ALIGNED(dst_rgba, 16) && IS_ALIGNED(dst_stride_rgba, 16)) {
         I422ToRGBARow = I422ToRGBARow_SSSE3;
       }
     }
   }
 #endif
   for (y = 0; y < height; ++y) {
     I422ToRGBARow(src_y, src_u, src_v, dst_rgba, width);
     dst_rgba += dst_stride_rgba;
     src_y += src_stride_y;
     src_u += src_stride_u;
     src_v += src_stride_v;
   }
   return 0;
 }
 // Convert NV12 to RGB565.
 LIBYUV_API
 int NV12ToRGB565(const uint8* src_y, int src_stride_y,
                  const uint8* src_uv, int src_stride_uv,
                  uint8* dst_rgb565, int dst_stride_rgb565,
                  int width, int height) {
   int y;
   void (*NV12ToRGB565Row)(const uint8* y_buf,
                           const uint8* uv_buf,
                           uint8* rgb_buf,
                           int width) = NV12ToRGB565Row_C;
   if (!src_y || !src_uv || !dst_rgb565 ||
       width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     dst_rgb565 = dst_rgb565 + (height - 1) * dst_stride_rgb565;
     dst_stride_rgb565 = -dst_stride_rgb565;
   }
 #if defined(HAS_NV12TORGB565ROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && width >= 8) {
     NV12ToRGB565Row = NV12ToRGB565Row_Any_SSSE3;
     if (IS_ALIGNED(width, 8)) {
       NV12ToRGB565Row = NV12ToRGB565Row_SSSE3;
     }
   }
 #elif defined(HAS_NV12TORGB565ROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
     NV12ToRGB565Row = NV12ToRGB565Row_Any_NEON;
     if (IS_ALIGNED(width, 8)) {
       NV12ToRGB565Row = NV12ToRGB565Row_NEON;
     }
   }
 #endif
   for (y = 0; y < height; ++y) {
     NV12ToRGB565Row(src_y, src_uv, dst_rgb565, width);
     dst_rgb565 += dst_stride_rgb565;
     src_y += src_stride_y;
     if (y & 1) {
       src_uv += src_stride_uv;
     }
   }
   return 0;
 }
 // Convert NV21 to RGB565.
 LIBYUV_API
 int NV21ToRGB565(const uint8* src_y, int src_stride_y,
                  const uint8* src_vu, int src_stride_vu,
                  uint8* dst_rgb565, int dst_stride_rgb565,
                  int width, int height) {
   int y;
   void (*NV21ToRGB565Row)(const uint8* y_buf,
                           const uint8* src_vu,
                           uint8* rgb_buf,
                           int width) = NV21ToRGB565Row_C;
   if (!src_y || !src_vu || !dst_rgb565 ||
       width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     dst_rgb565 = dst_rgb565 + (height - 1) * dst_stride_rgb565;
     dst_stride_rgb565 = -dst_stride_rgb565;
   }
 #if defined(HAS_NV21TORGB565ROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && width >= 8) {
     NV21ToRGB565Row = NV21ToRGB565Row_Any_SSSE3;
     if (IS_ALIGNED(width, 8)) {
       NV21ToRGB565Row = NV21ToRGB565Row_SSSE3;
     }
   }
 #elif defined(HAS_NV21TORGB565ROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
     NV21ToRGB565Row = NV21ToRGB565Row_Any_NEON;
     if (IS_ALIGNED(width, 8)) {
       NV21ToRGB565Row = NV21ToRGB565Row_NEON;
     }
   }
 #endif
   for (y = 0; y < height; ++y) {
     NV21ToRGB565Row(src_y, src_vu, dst_rgb565, width);
     dst_rgb565 += dst_stride_rgb565;
     src_y += src_stride_y;
     if (y & 1) {
       src_vu += src_stride_vu;
     }
   }
   return 0;
 }
 LIBYUV_API
 void SetPlane(uint8* dst_y, int dst_stride_y,
               int width, int height,
               uint32 value) {
   int y;
   uint32 v32 = value | (value << 8) | (value << 16) | (value << 24);
   void (*SetRow)(uint8* dst, uint32 value, int pix) = SetRow_C;
   // Coalesce rows.
   if (dst_stride_y == width) {
     width *= height;
     height = 1;
     dst_stride_y = 0;
   }
 #if defined(HAS_SETROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) &&
       IS_ALIGNED(width, 16) &&
       IS_ALIGNED(dst_y, 16) && IS_ALIGNED(dst_stride_y, 16)) {
     SetRow = SetRow_NEON;
   }
 #endif
 #if defined(HAS_SETROW_X86)
   if (TestCpuFlag(kCpuHasX86) && IS_ALIGNED(width, 4)) {
     SetRow = SetRow_X86;
   }
 #endif
   // Set plane
   for (y = 0; y < height; ++y) {
     SetRow(dst_y, v32, width);
     dst_y += dst_stride_y;
   }
 }
 // Draw a rectangle into I420
 LIBYUV_API
 int I420Rect(uint8* dst_y, int dst_stride_y,
              uint8* dst_u, int dst_stride_u,
              uint8* dst_v, int dst_stride_v,
              int x, int y,
              int width, int height,
              int value_y, int value_u, int value_v) {
   int halfwidth = (width + 1) >> 1;
   int halfheight = (height + 1) >> 1;
   uint8* start_y = dst_y + y * dst_stride_y + x;
   uint8* start_u = dst_u + (y / 2) * dst_stride_u + (x / 2);
   uint8* start_v = dst_v + (y / 2) * dst_stride_v + (x / 2);
   if (!dst_y || !dst_u || !dst_v ||
       width <= 0 || height <= 0 ||
       x < 0 || y < 0 ||
       value_y < 0 || value_y > 255 ||
       value_u < 0 || value_u > 255 ||
       value_v < 0 || value_v > 255) {
     return -1;
   }
   SetPlane(start_y, dst_stride_y, width, height, value_y);
   SetPlane(start_u, dst_stride_u, halfwidth, halfheight, value_u);
   SetPlane(start_v, dst_stride_v, halfwidth, halfheight, value_v);
   return 0;
 }
 // Draw a rectangle into ARGB
 LIBYUV_API
 int ARGBRect(uint8* dst_argb, int dst_stride_argb,
              int dst_x, int dst_y,
              int width, int height,
              uint32 value) {
   if (!dst_argb ||
       width <= 0 || height <= 0 ||
       dst_x < 0 || dst_y < 0) {
     return -1;
   }
   dst_argb += dst_y * dst_stride_argb + dst_x * 4;
   // Coalesce rows.
   if (dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     dst_stride_argb = 0;
   }
 #if defined(HAS_SETROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 16) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
     ARGBSetRows_NEON(dst_argb, value, width, dst_stride_argb, height);
     return 0;
   }
 #endif
 #if defined(HAS_SETROW_X86)
   if (TestCpuFlag(kCpuHasX86)) {
     ARGBSetRows_X86(dst_argb, value, width, dst_stride_argb, height);
     return 0;
   }
 #endif
   ARGBSetRows_C(dst_argb, value, width, dst_stride_argb, height);
   return 0;
 }
 // Convert unattentuated ARGB to preattenuated ARGB.
 // An unattenutated ARGB alpha blend uses the formula
 // p = a * f + (1 - a) * b
 // where
 //   p is output pixel
 //   f is foreground pixel
 //   b is background pixel
 //   a is alpha value from foreground pixel
 // An preattenutated ARGB alpha blend uses the formula
 // p = f + (1 - a) * b
 // where
 //   f is foreground pixel premultiplied by alpha
 LIBYUV_API
 int ARGBAttenuate(const uint8* src_argb, int src_stride_argb,
                   uint8* dst_argb, int dst_stride_argb,
                   int width, int height) {
   int y;
   void (*ARGBAttenuateRow)(const uint8* src_argb, uint8* dst_argb,
                            int width) = ARGBAttenuateRow_C;
   if (!src_argb || !dst_argb || width <= 0 || height == 0) {
     return -1;
   }
   if (height < 0) {
     height = -height;
     src_argb = src_argb + (height - 1) * src_stride_argb;
     src_stride_argb = -src_stride_argb;
   }
   // Coalesce rows.
   if (src_stride_argb == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBATTENUATEROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && width >= 4 &&
       IS_ALIGNED(src_argb, 16) && IS_ALIGNED(src_stride_argb, 16) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
     ARGBAttenuateRow = ARGBAttenuateRow_Any_SSE2;
     if (IS_ALIGNED(width, 4)) {
       ARGBAttenuateRow = ARGBAttenuateRow_SSE2;
     }
   }
 #endif
 #if defined(HAS_ARGBATTENUATEROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && width >= 4) {
     ARGBAttenuateRow = ARGBAttenuateRow_Any_SSSE3;
     if (IS_ALIGNED(width, 4)) {
       ARGBAttenuateRow = ARGBAttenuateRow_SSSE3;
     }
   }
 #endif
 #if defined(HAS_ARGBATTENUATEROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && width >= 8) {
     ARGBAttenuateRow = ARGBAttenuateRow_Any_AVX2;
     if (IS_ALIGNED(width, 8)) {
       ARGBAttenuateRow = ARGBAttenuateRow_AVX2;
     }
   }
 #endif
 #if defined(HAS_ARGBATTENUATEROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
     ARGBAttenuateRow = ARGBAttenuateRow_Any_NEON;
     if (IS_ALIGNED(width, 8)) {
       ARGBAttenuateRow = ARGBAttenuateRow_NEON;
     }
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBAttenuateRow(src_argb, dst_argb, width);
     src_argb += src_stride_argb;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Convert preattentuated ARGB to unattenuated ARGB.
 LIBYUV_API
 int ARGBUnattenuate(const uint8* src_argb, int src_stride_argb,
                     uint8* dst_argb, int dst_stride_argb,
                     int width, int height) {
   int y;
   void (*ARGBUnattenuateRow)(const uint8* src_argb, uint8* dst_argb,
                              int width) = ARGBUnattenuateRow_C;
   if (!src_argb || !dst_argb || width <= 0 || height == 0) {
     return -1;
   }
   if (height < 0) {
     height = -height;
     src_argb = src_argb + (height - 1) * src_stride_argb;
     src_stride_argb = -src_stride_argb;
   }
   // Coalesce rows.
   if (src_stride_argb == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBUNATTENUATEROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && width >= 4) {
     ARGBUnattenuateRow = ARGBUnattenuateRow_Any_SSE2;
     if (IS_ALIGNED(width, 4)) {
       ARGBUnattenuateRow = ARGBUnattenuateRow_SSE2;
     }
   }
 #endif
 #if defined(HAS_ARGBUNATTENUATEROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && width >= 8) {
     ARGBUnattenuateRow = ARGBUnattenuateRow_Any_AVX2;
     if (IS_ALIGNED(width, 8)) {
       ARGBUnattenuateRow = ARGBUnattenuateRow_AVX2;
     }
   }
 #endif
 // TODO(fbarchard): Neon version.
   for (y = 0; y < height; ++y) {
     ARGBUnattenuateRow(src_argb, dst_argb, width);
     src_argb += src_stride_argb;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Convert ARGB to Grayed ARGB.
 LIBYUV_API
 int ARGBGrayTo(const uint8* src_argb, int src_stride_argb,
                uint8* dst_argb, int dst_stride_argb,
                int width, int height) {
   int y;
   void (*ARGBGrayRow)(const uint8* src_argb, uint8* dst_argb,
                       int width) = ARGBGrayRow_C;
   if (!src_argb || !dst_argb || width <= 0 || height == 0) {
     return -1;
   }
   if (height < 0) {
     height = -height;
     src_argb = src_argb + (height - 1) * src_stride_argb;
     src_stride_argb = -src_stride_argb;
   }
   // Coalesce rows.
   if (src_stride_argb == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBGRAYROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && IS_ALIGNED(width, 8) &&
       IS_ALIGNED(src_argb, 16) && IS_ALIGNED(src_stride_argb, 16) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
     ARGBGrayRow = ARGBGrayRow_SSSE3;
   }
 #elif defined(HAS_ARGBGRAYROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 8)) {
     ARGBGrayRow = ARGBGrayRow_NEON;
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBGrayRow(src_argb, dst_argb, width);
     src_argb += src_stride_argb;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Make a rectangle of ARGB gray scale.
 LIBYUV_API
 int ARGBGray(uint8* dst_argb, int dst_stride_argb,
              int dst_x, int dst_y,
              int width, int height) {
   int y;
   void (*ARGBGrayRow)(const uint8* src_argb, uint8* dst_argb,
                       int width) = ARGBGrayRow_C;
   uint8* dst = dst_argb + dst_y * dst_stride_argb + dst_x * 4;
   if (!dst_argb || width <= 0 || height <= 0 || dst_x < 0 || dst_y < 0) {
     return -1;
   }
   // Coalesce rows.
   if (dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBGRAYROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && IS_ALIGNED(width, 8) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
     ARGBGrayRow = ARGBGrayRow_SSSE3;
   }
 #elif defined(HAS_ARGBGRAYROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 8)) {
     ARGBGrayRow = ARGBGrayRow_NEON;
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBGrayRow(dst, dst, width);
     dst += dst_stride_argb;
   }
   return 0;
 }
 // Make a rectangle of ARGB Sepia tone.
 LIBYUV_API
 int ARGBSepia(uint8* dst_argb, int dst_stride_argb,
               int dst_x, int dst_y, int width, int height) {
   int y;
   void (*ARGBSepiaRow)(uint8* dst_argb, int width) = ARGBSepiaRow_C;
   uint8* dst = dst_argb + dst_y * dst_stride_argb + dst_x * 4;
   if (!dst_argb || width <= 0 || height <= 0 || dst_x < 0 || dst_y < 0) {
     return -1;
   }
   // Coalesce rows.
   if (dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBSEPIAROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && IS_ALIGNED(width, 8) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
     ARGBSepiaRow = ARGBSepiaRow_SSSE3;
   }
 #elif defined(HAS_ARGBSEPIAROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 8)) {
     ARGBSepiaRow = ARGBSepiaRow_NEON;
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBSepiaRow(dst, width);
     dst += dst_stride_argb;
   }
   return 0;
 }
 // Apply a 4x4 matrix to each ARGB pixel.
 // Note: Normally for shading, but can be used to swizzle or invert.
 LIBYUV_API
 int ARGBColorMatrix(const uint8* src_argb, int src_stride_argb,
                     uint8* dst_argb, int dst_stride_argb,
                     const int8* matrix_argb,
                     int width, int height) {
   int y;
   void (*ARGBColorMatrixRow)(const uint8* src_argb, uint8* dst_argb,
       const int8* matrix_argb, int width) = ARGBColorMatrixRow_C;
   if (!src_argb || !dst_argb || !matrix_argb || width <= 0 || height == 0) {
     return -1;
   }
   if (height < 0) {
     height = -height;
     src_argb = src_argb + (height - 1) * src_stride_argb;
     src_stride_argb = -src_stride_argb;
   }
   // Coalesce rows.
   if (src_stride_argb == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBCOLORMATRIXROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && IS_ALIGNED(width, 8) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
     ARGBColorMatrixRow = ARGBColorMatrixRow_SSSE3;
   }
 #elif defined(HAS_ARGBCOLORMATRIXROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 8)) {
     ARGBColorMatrixRow = ARGBColorMatrixRow_NEON;
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBColorMatrixRow(src_argb, dst_argb, matrix_argb, width);
     src_argb += src_stride_argb;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Apply a 4x3 matrix to each ARGB pixel.
 // Deprecated.
 LIBYUV_API
 int RGBColorMatrix(uint8* dst_argb, int dst_stride_argb,
                    const int8* matrix_rgb,
                    int dst_x, int dst_y, int width, int height) {
   SIMD_ALIGNED(int8 matrix_argb[16]);
   uint8* dst = dst_argb + dst_y * dst_stride_argb + dst_x * 4;
   if (!dst_argb || !matrix_rgb || width <= 0 || height <= 0 ||
       dst_x < 0 || dst_y < 0) {
     return -1;
   }
   // Convert 4x3 7 bit matrix to 4x4 6 bit matrix.
   matrix_argb[0] = matrix_rgb[0] / 2;
   matrix_argb[1] = matrix_rgb[1] / 2;
   matrix_argb[2] = matrix_rgb[2] / 2;
   matrix_argb[3] = matrix_rgb[3] / 2;
   matrix_argb[4] = matrix_rgb[4] / 2;
   matrix_argb[5] = matrix_rgb[5] / 2;
   matrix_argb[6] = matrix_rgb[6] / 2;
   matrix_argb[7] = matrix_rgb[7] / 2;
   matrix_argb[8] = matrix_rgb[8] / 2;
   matrix_argb[9] = matrix_rgb[9] / 2;
   matrix_argb[10] = matrix_rgb[10] / 2;
   matrix_argb[11] = matrix_rgb[11] / 2;
   matrix_argb[14] = matrix_argb[13] = matrix_argb[12] = 0;
   matrix_argb[15] = 64;  // 1.0
   return ARGBColorMatrix((const uint8*)(dst), dst_stride_argb,
                          dst, dst_stride_argb,
                          &matrix_argb[0], width, height);
 }
 // Apply a color table each ARGB pixel.
 // Table contains 256 ARGB values.
 LIBYUV_API
 int ARGBColorTable(uint8* dst_argb, int dst_stride_argb,
                    const uint8* table_argb,
                    int dst_x, int dst_y, int width, int height) {
   int y;
   void (*ARGBColorTableRow)(uint8* dst_argb, const uint8* table_argb,
                             int width) = ARGBColorTableRow_C;
   uint8* dst = dst_argb + dst_y * dst_stride_argb + dst_x * 4;
   if (!dst_argb || !table_argb || width <= 0 || height <= 0 ||
       dst_x < 0 || dst_y < 0) {
     return -1;
   }
   // Coalesce rows.
   if (dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBCOLORTABLEROW_X86)
   if (TestCpuFlag(kCpuHasX86)) {
     ARGBColorTableRow = ARGBColorTableRow_X86;
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBColorTableRow(dst, table_argb, width);
     dst += dst_stride_argb;
   }
   return 0;
 }
 // Apply a color table each ARGB pixel but preserve destination alpha.
 // Table contains 256 ARGB values.
 LIBYUV_API
 int RGBColorTable(uint8* dst_argb, int dst_stride_argb,
                   const uint8* table_argb,
                   int dst_x, int dst_y, int width, int height) {
   int y;
   void (*RGBColorTableRow)(uint8* dst_argb, const uint8* table_argb,
                            int width) = RGBColorTableRow_C;
   uint8* dst = dst_argb + dst_y * dst_stride_argb + dst_x * 4;
   if (!dst_argb || !table_argb || width <= 0 || height <= 0 ||
       dst_x < 0 || dst_y < 0) {
     return -1;
   }
   // Coalesce rows.
   if (dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     dst_stride_argb = 0;
   }
 #if defined(HAS_RGBCOLORTABLEROW_X86)
   if (TestCpuFlag(kCpuHasX86)) {
     RGBColorTableRow = RGBColorTableRow_X86;
   }
 #endif
   for (y = 0; y < height; ++y) {
     RGBColorTableRow(dst, table_argb, width);
     dst += dst_stride_argb;
   }
   return 0;
 }
 // ARGBQuantize is used to posterize art.
 // e.g. rgb / qvalue * qvalue + qvalue / 2
 // But the low levels implement efficiently with 3 parameters, and could be
 // used for other high level operations.
 // dst_argb[0] = (b * scale >> 16) * interval_size + interval_offset;
 // where scale is 1 / interval_size as a fixed point value.
 // The divide is replaces with a multiply by reciprocal fixed point multiply.
 // Caveat - although SSE2 saturates, the C function does not and should be used
 // with care if doing anything but quantization.
 LIBYUV_API
 int ARGBQuantize(uint8* dst_argb, int dst_stride_argb,
                  int scale, int interval_size, int interval_offset,
                  int dst_x, int dst_y, int width, int height) {
   int y;
   void (*ARGBQuantizeRow)(uint8* dst_argb, int scale, int interval_size,
                           int interval_offset, int width) = ARGBQuantizeRow_C;
   uint8* dst = dst_argb + dst_y * dst_stride_argb + dst_x * 4;
   if (!dst_argb || width <= 0 || height <= 0 || dst_x < 0 || dst_y < 0 ||
       interval_size < 1 || interval_size > 255) {
     return -1;
   }
   // Coalesce rows.
   if (dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBQUANTIZEROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(width, 4) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
     ARGBQuantizeRow = ARGBQuantizeRow_SSE2;
   }
 #elif defined(HAS_ARGBQUANTIZEROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 8)) {
     ARGBQuantizeRow = ARGBQuantizeRow_NEON;
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBQuantizeRow(dst, scale, interval_size, interval_offset, width);
     dst += dst_stride_argb;
   }
   return 0;
 }
 // Computes table of cumulative sum for image where the value is the sum
 // of all values above and to the left of the entry. Used by ARGBBlur.
 LIBYUV_API
 int ARGBComputeCumulativeSum(const uint8* src_argb, int src_stride_argb,
                              int32* dst_cumsum, int dst_stride32_cumsum,
                              int width, int height) {
   int y;
   void (*ComputeCumulativeSumRow)(const uint8* row, int32* cumsum,
       const int32* previous_cumsum, int width) = ComputeCumulativeSumRow_C;
   int32* previous_cumsum = dst_cumsum;
   if (!dst_cumsum || !src_argb || width <= 0 || height <= 0) {
     return -1;
   }
 #if defined(HAS_CUMULATIVESUMTOAVERAGEROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2)) {
     ComputeCumulativeSumRow = ComputeCumulativeSumRow_SSE2;
   }
 #endif
   memset(dst_cumsum, 0, width * sizeof(dst_cumsum[0]) * 4);  // 4 int per pixel.
   for (y = 0; y < height; ++y) {
     ComputeCumulativeSumRow(src_argb, dst_cumsum, previous_cumsum, width);
     previous_cumsum = dst_cumsum;
     dst_cumsum += dst_stride32_cumsum;
     src_argb += src_stride_argb;
   }
   return 0;
 }
 // Blur ARGB image.
 // Caller should allocate CumulativeSum table of width * height * 16 bytes
 // aligned to 16 byte boundary. height can be radius * 2 + 2 to save memory
 // as the buffer is treated as circular.
 LIBYUV_API
 int ARGBBlur(const uint8* src_argb, int src_stride_argb,
              uint8* dst_argb, int dst_stride_argb,
              int32* dst_cumsum, int dst_stride32_cumsum,
              int width, int height, int radius) {
   int y;
   void (*ComputeCumulativeSumRow)(const uint8 *row, int32 *cumsum,
       const int32* previous_cumsum, int width) = ComputeCumulativeSumRow_C;
   void (*CumulativeSumToAverageRow)(const int32* topleft, const int32* botleft,
       int width, int area, uint8* dst, int count) = CumulativeSumToAverageRow_C;
   int32* cumsum_bot_row;
   int32* max_cumsum_bot_row;
   int32* cumsum_top_row;
   if (!src_argb || !dst_argb || width <= 0 || height == 0) {
     return -1;
   }
   if (height < 0) {
     height = -height;
     src_argb = src_argb + (height - 1) * src_stride_argb;
     src_stride_argb = -src_stride_argb;
   }
   if (radius > height) {
     radius = height;
   }
   if (radius > (width / 2 - 1)) {
     radius = width / 2 - 1;
   }
   if (radius <= 0) {
     return -1;
   }
 #if defined(HAS_CUMULATIVESUMTOAVERAGEROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2)) {
     ComputeCumulativeSumRow = ComputeCumulativeSumRow_SSE2;
     CumulativeSumToAverageRow = CumulativeSumToAverageRow_SSE2;
   }
 #endif
   // Compute enough CumulativeSum for first row to be blurred. After this
   // one row of CumulativeSum is updated at a time.
   ARGBComputeCumulativeSum(src_argb, src_stride_argb,
                            dst_cumsum, dst_stride32_cumsum,
                            width, radius);
   src_argb = src_argb + radius * src_stride_argb;
   cumsum_bot_row = &dst_cumsum[(radius - 1) * dst_stride32_cumsum];
   max_cumsum_bot_row = &dst_cumsum[(radius * 2 + 2) * dst_stride32_cumsum];
   cumsum_top_row = &dst_cumsum[0];
   for (y = 0; y < height; ++y) {
     int top_y = ((y - radius - 1) >= 0) ? (y - radius - 1) : 0;
     int bot_y = ((y + radius) < height) ? (y + radius) : (height - 1);
     int area = radius * (bot_y - top_y);
     int boxwidth = radius * 4;
     int x;
     int n;
     // Increment cumsum_top_row pointer with circular buffer wrap around.
     if (top_y) {
       cumsum_top_row += dst_stride32_cumsum;
       if (cumsum_top_row >= max_cumsum_bot_row) {
         cumsum_top_row = dst_cumsum;
       }
     }
     // Increment cumsum_bot_row pointer with circular buffer wrap around and
     // then fill in a row of CumulativeSum.
     if ((y + radius) < height) {
       const int32* prev_cumsum_bot_row = cumsum_bot_row;
       cumsum_bot_row += dst_stride32_cumsum;
       if (cumsum_bot_row >= max_cumsum_bot_row) {
         cumsum_bot_row = dst_cumsum;
       }
       ComputeCumulativeSumRow(src_argb, cumsum_bot_row, prev_cumsum_bot_row,
                               width);
       src_argb += src_stride_argb;
     }
     // Left clipped.
     for (x = 0; x < radius + 1; ++x) {
       CumulativeSumToAverageRow(cumsum_top_row, cumsum_bot_row,
                                 boxwidth, area, &dst_argb[x * 4], 1);
       area += (bot_y - top_y);
       boxwidth += 4;
     }
     // Middle unclipped.
     n = (width - 1) - radius - x + 1;
     CumulativeSumToAverageRow(cumsum_top_row, cumsum_bot_row,
                               boxwidth, area, &dst_argb[x * 4], n);
     // Right clipped.
     for (x += n; x <= width - 1; ++x) {
       area -= (bot_y - top_y);
       boxwidth -= 4;
       CumulativeSumToAverageRow(cumsum_top_row + (x - radius - 1) * 4,
                                 cumsum_bot_row + (x - radius - 1) * 4,
                                 boxwidth, area, &dst_argb[x * 4], 1);
     }
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Multiply ARGB image by a specified ARGB value.
 LIBYUV_API
 int ARGBShade(const uint8* src_argb, int src_stride_argb,
               uint8* dst_argb, int dst_stride_argb,
               int width, int height, uint32 value) {
   int y;
   void (*ARGBShadeRow)(const uint8* src_argb, uint8* dst_argb,
                        int width, uint32 value) = ARGBShadeRow_C;
   if (!src_argb || !dst_argb || width <= 0 || height == 0 || value == 0u) {
     return -1;
   }
   if (height < 0) {
     height = -height;
     src_argb = src_argb + (height - 1) * src_stride_argb;
     src_stride_argb = -src_stride_argb;
   }
   // Coalesce rows.
   if (src_stride_argb == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBSHADEROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(width, 4) &&
       IS_ALIGNED(src_argb, 16) && IS_ALIGNED(src_stride_argb, 16) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
     ARGBShadeRow = ARGBShadeRow_SSE2;
   }
 #elif defined(HAS_ARGBSHADEROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 8)) {
     ARGBShadeRow = ARGBShadeRow_NEON;
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBShadeRow(src_argb, dst_argb, width, value);
     src_argb += src_stride_argb;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Interpolate 2 ARGB images by specified amount (0 to 255).
 LIBYUV_API
 int ARGBInterpolate(const uint8* src_argb0, int src_stride_argb0,
                     const uint8* src_argb1, int src_stride_argb1,
                     uint8* dst_argb, int dst_stride_argb,
                     int width, int height, int interpolation) {
   int y;
   void (*InterpolateRow)(uint8* dst_ptr, const uint8* src_ptr,
                          ptrdiff_t src_stride, int dst_width,
                          int source_y_fraction) = InterpolateRow_C;
   if (!src_argb0 || !src_argb1 || !dst_argb || width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     dst_argb = dst_argb + (height - 1) * dst_stride_argb;
     dst_stride_argb = -dst_stride_argb;
   }
   // Coalesce rows.
   if (src_stride_argb0 == width * 4 &&
       src_stride_argb1 == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb0 = src_stride_argb1 = dst_stride_argb = 0;
   }
 #if defined(HAS_INTERPOLATEROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && width >= 4) {
     InterpolateRow = InterpolateRow_Any_SSE2;
     if (IS_ALIGNED(width, 4)) {
       InterpolateRow = InterpolateRow_Unaligned_SSE2;
       if (IS_ALIGNED(src_argb0, 16) && IS_ALIGNED(src_stride_argb0, 16) &&
           IS_ALIGNED(src_argb1, 16) && IS_ALIGNED(src_stride_argb1, 16) &&
           IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
         InterpolateRow = InterpolateRow_SSE2;
       }
     }
   }
 #endif
 #if defined(HAS_INTERPOLATEROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && width >= 4) {
     InterpolateRow = InterpolateRow_Any_SSSE3;
     if (IS_ALIGNED(width, 4)) {
       InterpolateRow = InterpolateRow_Unaligned_SSSE3;
       if (IS_ALIGNED(src_argb0, 16) && IS_ALIGNED(src_stride_argb0, 16) &&
           IS_ALIGNED(src_argb1, 16) && IS_ALIGNED(src_stride_argb1, 16) &&
           IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
         InterpolateRow = InterpolateRow_SSSE3;
       }
     }
   }
 #endif
 #if defined(HAS_INTERPOLATEROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && width >= 8) {
     InterpolateRow = InterpolateRow_Any_AVX2;
     if (IS_ALIGNED(width, 8)) {
       InterpolateRow = InterpolateRow_AVX2;
     }
   }
 #endif
 #if defined(HAS_INTERPOLATEROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && width >= 4) {
     InterpolateRow = InterpolateRow_Any_NEON;
     if (IS_ALIGNED(width, 4)) {
       InterpolateRow = InterpolateRow_NEON;
     }
   }
 #endif
 #if defined(HAS_INTERPOLATEROWS_MIPS_DSPR2)
   if (TestCpuFlag(kCpuHasMIPS_DSPR2) && width >= 1 &&
       IS_ALIGNED(src_argb0, 4) && IS_ALIGNED(src_stride_argb0, 4) &&
       IS_ALIGNED(src_argb1, 4) && IS_ALIGNED(src_stride_argb1, 4) &&
       IS_ALIGNED(dst_argb, 4) && IS_ALIGNED(dst_stride_argb, 4)) {
     ScaleARGBFilterRows = InterpolateRow_MIPS_DSPR2;
   }
 #endif
   for (y = 0; y < height; ++y) {
     InterpolateRow(dst_argb, src_argb0, src_argb1 - src_argb0,
                    width * 4, interpolation);
     src_argb0 += src_stride_argb0;
     src_argb1 += src_stride_argb1;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Shuffle ARGB channel order.  e.g. BGRA to ARGB.
 LIBYUV_API
 int ARGBShuffle(const uint8* src_bgra, int src_stride_bgra,
                 uint8* dst_argb, int dst_stride_argb,
                 const uint8* shuffler, int width, int height) {
   int y;
   void (*ARGBShuffleRow)(const uint8* src_bgra, uint8* dst_argb,
                          const uint8* shuffler, int pix) = ARGBShuffleRow_C;
   if (!src_bgra || !dst_argb ||
       width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     src_bgra = src_bgra + (height - 1) * src_stride_bgra;
     src_stride_bgra = -src_stride_bgra;
   }
   // Coalesce rows.
   if (src_stride_bgra == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_bgra = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBSHUFFLEROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && width >= 4) {
     ARGBShuffleRow = ARGBShuffleRow_Any_SSE2;
     if (IS_ALIGNED(width, 4)) {
       ARGBShuffleRow = ARGBShuffleRow_SSE2;
     }
   }
 #endif
 #if defined(HAS_ARGBSHUFFLEROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && width >= 8) {
     ARGBShuffleRow = ARGBShuffleRow_Any_SSSE3;
     if (IS_ALIGNED(width, 8)) {
       ARGBShuffleRow = ARGBShuffleRow_Unaligned_SSSE3;
       if (IS_ALIGNED(src_bgra, 16) && IS_ALIGNED(src_stride_bgra, 16) &&
           IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
         ARGBShuffleRow = ARGBShuffleRow_SSSE3;
       }
     }
   }
 #endif
 #if defined(HAS_ARGBSHUFFLEROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && width >= 16) {
     ARGBShuffleRow = ARGBShuffleRow_Any_AVX2;
     if (IS_ALIGNED(width, 16)) {
       ARGBShuffleRow = ARGBShuffleRow_AVX2;
     }
   }
 #endif
 #if defined(HAS_ARGBSHUFFLEROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && width >= 4) {
     ARGBShuffleRow = ARGBShuffleRow_Any_NEON;
     if (IS_ALIGNED(width, 4)) {
       ARGBShuffleRow = ARGBShuffleRow_NEON;
     }
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBShuffleRow(src_bgra, dst_argb, shuffler, width);
     src_bgra += src_stride_bgra;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Sobel ARGB effect.
 static int ARGBSobelize(const uint8* src_argb, int src_stride_argb,
                         uint8* dst_argb, int dst_stride_argb,
                         int width, int height,
                         void (*SobelRow)(const uint8* src_sobelx,
                                          const uint8* src_sobely,
                                          uint8* dst, int width)) {
   int y;
   void (*ARGBToBayerRow)(const uint8* src_argb, uint8* dst_bayer,
                          uint32 selector, int pix) = ARGBToBayerGGRow_C;
   void (*SobelYRow)(const uint8* src_y0, const uint8* src_y1,
                     uint8* dst_sobely, int width) = SobelYRow_C;
   void (*SobelXRow)(const uint8* src_y0, const uint8* src_y1,
                     const uint8* src_y2, uint8* dst_sobely, int width) =
       SobelXRow_C;
   const int kEdge = 16;  // Extra pixels at start of row for extrude/align.
   if (!src_argb  || !dst_argb || width <= 0 || height == 0) {
     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;
   }
   // ARGBToBayer used to select G channel from ARGB.
 #if defined(HAS_ARGBTOBAYERGGROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && width >= 8 &&
       IS_ALIGNED(src_argb, 16) && IS_ALIGNED(src_stride_argb, 16)) {
     ARGBToBayerRow = ARGBToBayerGGRow_Any_SSE2;
     if (IS_ALIGNED(width, 8)) {
       ARGBToBayerRow = ARGBToBayerGGRow_SSE2;
     }
   }
 #endif
 #if defined(HAS_ARGBTOBAYERROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && width >= 8 &&
       IS_ALIGNED(src_argb, 16) && IS_ALIGNED(src_stride_argb, 16)) {
     ARGBToBayerRow = ARGBToBayerRow_Any_SSSE3;
     if (IS_ALIGNED(width, 8)) {
       ARGBToBayerRow = ARGBToBayerRow_SSSE3;
     }
   }
 #endif
 #if defined(HAS_ARGBTOBAYERGGROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
     ARGBToBayerRow = ARGBToBayerGGRow_Any_NEON;
     if (IS_ALIGNED(width, 8)) {
       ARGBToBayerRow = ARGBToBayerGGRow_NEON;
     }
   }
 #endif
 #if defined(HAS_SOBELYROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2)) {
     SobelYRow = SobelYRow_SSE2;
   }
 #endif
 #if defined(HAS_SOBELYROW_NEON)
   if (TestCpuFlag(kCpuHasNEON)) {
     SobelYRow = SobelYRow_NEON;
   }
 #endif
 #if defined(HAS_SOBELXROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2)) {
     SobelXRow = SobelXRow_SSE2;
   }
 #endif
 #if defined(HAS_SOBELXROW_NEON)
   if (TestCpuFlag(kCpuHasNEON)) {
     SobelXRow = SobelXRow_NEON;
   }
 #endif
   {
     // 3 rows with edges before/after.
     const int kRowSize = (width + kEdge + 15) & ~15;
     align_buffer_64(rows, kRowSize * 2 + (kEdge + kRowSize * 3 + kEdge));
     uint8* row_sobelx = rows;
     uint8* row_sobely = rows + kRowSize;
     uint8* row_y = rows + kRowSize * 2;
     // Convert first row.
     uint8* row_y0 = row_y + kEdge;
     uint8* row_y1 = row_y0 + kRowSize;
     uint8* row_y2 = row_y1 + kRowSize;
     ARGBToBayerRow(src_argb, row_y0, 0x0d090501, width);
     row_y0[-1] = row_y0[0];
     memset(row_y0 + width, row_y0[width - 1], 16);  // Extrude 16 for valgrind.
     ARGBToBayerRow(src_argb, row_y1, 0x0d090501, width);
     row_y1[-1] = row_y1[0];
     memset(row_y1 + width, row_y1[width - 1], 16);
     memset(row_y2 + width, 0, 16);
     for (y = 0; y < height; ++y) {
       // Convert next row of ARGB to Y.
       if (y < (height - 1)) {
         src_argb += src_stride_argb;
       }
       ARGBToBayerRow(src_argb, row_y2, 0x0d090501, width);
       row_y2[-1] = row_y2[0];
       row_y2[width] = row_y2[width - 1];
       SobelXRow(row_y0 - 1, row_y1 - 1, row_y2 - 1, row_sobelx, width);
       SobelYRow(row_y0 - 1, row_y2 - 1, row_sobely, width);
       SobelRow(row_sobelx, row_sobely, dst_argb, width);
       // Cycle thru circular queue of 3 row_y buffers.
       {
         uint8* row_yt = row_y0;
         row_y0 = row_y1;
         row_y1 = row_y2;
         row_y2 = row_yt;
       }
       dst_argb += dst_stride_argb;
     }
     free_aligned_buffer_64(rows);
   }
   return 0;
 }
 // Sobel ARGB effect.
 LIBYUV_API
 int ARGBSobel(const uint8* src_argb, int src_stride_argb,
               uint8* dst_argb, int dst_stride_argb,
               int width, int height) {
   void (*SobelRow)(const uint8* src_sobelx, const uint8* src_sobely,
                    uint8* dst_argb, int width) = SobelRow_C;
 #if defined(HAS_SOBELROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(width, 16) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
     SobelRow = SobelRow_SSE2;
   }
 #endif
 #if defined(HAS_SOBELROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 8)) {
     SobelRow = SobelRow_NEON;
   }
 #endif
   return ARGBSobelize(src_argb, src_stride_argb, dst_argb, dst_stride_argb,
                       width, height, SobelRow);
 }
 // Sobel ARGB effect with planar output.
 LIBYUV_API
 int ARGBSobelToPlane(const uint8* src_argb, int src_stride_argb,
                      uint8* dst_y, int dst_stride_y,
                      int width, int height) {
   void (*SobelToPlaneRow)(const uint8* src_sobelx, const uint8* src_sobely,
                           uint8* dst_, int width) = SobelToPlaneRow_C;
 #if defined(HAS_SOBELTOPLANEROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(width, 16) &&
       IS_ALIGNED(dst_y, 16) && IS_ALIGNED(dst_stride_y, 16)) {
     SobelToPlaneRow = SobelToPlaneRow_SSE2;
   }
 #endif
 #if defined(HAS_SOBELTOPLANEROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 16)) {
     SobelToPlaneRow = SobelToPlaneRow_NEON;
   }
 #endif
   return ARGBSobelize(src_argb, src_stride_argb, dst_y, dst_stride_y,
                       width, height, SobelToPlaneRow);
 }
 // SobelXY ARGB effect.
 // Similar to Sobel, but also stores Sobel X in R and Sobel Y in B.  G = Sobel.
 LIBYUV_API
 int ARGBSobelXY(const uint8* src_argb, int src_stride_argb,
                 uint8* dst_argb, int dst_stride_argb,
                 int width, int height) {
   void (*SobelXYRow)(const uint8* src_sobelx, const uint8* src_sobely,
                      uint8* dst_argb, int width) = SobelXYRow_C;
 #if defined(HAS_SOBELXYROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(width, 16) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
     SobelXYRow = SobelXYRow_SSE2;
   }
 #endif
 #if defined(HAS_SOBELXYROW_NEON)
   if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 8)) {
     SobelXYRow = SobelXYRow_NEON;
   }
 #endif
   return ARGBSobelize(src_argb, src_stride_argb, dst_argb, dst_stride_argb,
                       width, height, SobelXYRow);
 }
 // Apply a 4x4 polynomial to each ARGB pixel.
 LIBYUV_API
 int ARGBPolynomial(const uint8* src_argb, int src_stride_argb,
                    uint8* dst_argb, int dst_stride_argb,
                    const float* poly,
                    int width, int height) {
   int y;
   void (*ARGBPolynomialRow)(const uint8* src_argb,
                             uint8* dst_argb, const float* poly,
                             int width) = ARGBPolynomialRow_C;
   if (!src_argb || !dst_argb || !poly || width <= 0 || height == 0) {
     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;
   }
   // Coalesce rows.
   if (src_stride_argb == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBPOLYNOMIALROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(width, 2)) {
     ARGBPolynomialRow = ARGBPolynomialRow_SSE2;
   }
 #endif
 #if defined(HAS_ARGBPOLYNOMIALROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && TestCpuFlag(kCpuHasFMA3) &&
       IS_ALIGNED(width, 2)) {
     ARGBPolynomialRow = ARGBPolynomialRow_AVX2;
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBPolynomialRow(src_argb, dst_argb, poly, width);
     src_argb += src_stride_argb;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Apply a lumacolortable to each ARGB pixel.
 LIBYUV_API
 int ARGBLumaColorTable(const uint8* src_argb, int src_stride_argb,
                        uint8* dst_argb, int dst_stride_argb,
                        const uint8* luma,
                        int width, int height) {
   int y;
   void (*ARGBLumaColorTableRow)(const uint8* src_argb, uint8* dst_argb,
       int width, const uint8* luma, const uint32 lumacoeff) =
       ARGBLumaColorTableRow_C;
   if (!src_argb || !dst_argb || !luma || width <= 0 || height == 0) {
     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;
   }
   // Coalesce rows.
   if (src_stride_argb == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBLUMACOLORTABLEROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3) && IS_ALIGNED(width, 4)) {
     ARGBLumaColorTableRow = ARGBLumaColorTableRow_SSSE3;
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBLumaColorTableRow(src_argb, dst_argb, width, luma, 0x00264b0f);
     src_argb += src_stride_argb;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Copy Alpha from one ARGB image to another.
 LIBYUV_API
 int ARGBCopyAlpha(const uint8* src_argb, int src_stride_argb,
                   uint8* dst_argb, int dst_stride_argb,
                   int width, int height) {
   int y;
   void (*ARGBCopyAlphaRow)(const uint8* src_argb, uint8* dst_argb, int width) =
       ARGBCopyAlphaRow_C;
   if (!src_argb || !dst_argb || width <= 0 || height == 0) {
     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;
   }
   // Coalesce rows.
   if (src_stride_argb == width * 4 &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_argb = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBCOPYALPHAROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) &&
       IS_ALIGNED(src_argb, 16) && IS_ALIGNED(src_stride_argb, 16) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16) &&
       IS_ALIGNED(width, 8)) {
     ARGBCopyAlphaRow = ARGBCopyAlphaRow_SSE2;
   }
 #endif
 #if defined(HAS_ARGBCOPYALPHAROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && IS_ALIGNED(width, 16)) {
     ARGBCopyAlphaRow = ARGBCopyAlphaRow_AVX2;
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBCopyAlphaRow(src_argb, dst_argb, width);
     src_argb += src_stride_argb;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 // Copy a planar Y channel to the alpha channel of a destination ARGB image.
 LIBYUV_API
 int ARGBCopyYToAlpha(const uint8* src_y, int src_stride_y,
                      uint8* dst_argb, int dst_stride_argb,
                      int width, int height) {
   int y;
   void (*ARGBCopyYToAlphaRow)(const uint8* src_y, uint8* dst_argb, int width) =
       ARGBCopyYToAlphaRow_C;
   if (!src_y || !dst_argb || width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     src_y = src_y + (height - 1) * src_stride_y;
     src_stride_y = -src_stride_y;
   }
   // Coalesce rows.
   if (src_stride_y == width &&
       dst_stride_argb == width * 4) {
     width *= height;
     height = 1;
     src_stride_y = dst_stride_argb = 0;
   }
 #if defined(HAS_ARGBCOPYYTOALPHAROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2) &&
       IS_ALIGNED(src_y, 16) && IS_ALIGNED(src_stride_y, 16) &&
       IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16) &&
       IS_ALIGNED(width, 8)) {
     ARGBCopyYToAlphaRow = ARGBCopyYToAlphaRow_SSE2;
   }
 #endif
 #if defined(HAS_ARGBCOPYYTOALPHAROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2) && IS_ALIGNED(width, 16)) {
     ARGBCopyYToAlphaRow = ARGBCopyYToAlphaRow_AVX2;
   }
 #endif
   for (y = 0; y < height; ++y) {
     ARGBCopyYToAlphaRow(src_y, dst_argb, width);
     src_y += src_stride_y;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif

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media/libyuv/source/planar_functions.cc@6474c204b198 (annotated)

media/libyuv/source/planar_functions.cc