rotate_test.cc

/*
 *  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 <stdlib.h>
#include <time.h>

#include "libyuv/rotate.h"
#include "../unit_test/unit_test.h"
#include "libyuv/cpu_id.h"

namespace libyuv {

void PrintArray(uint8 *array, int w, int h) {
  for (int i = 0; i < h; ++i) {
    for (int j = 0; j < w; ++j) {
      printf("%4d", (signed char)array[i * w + j]);
    }
    printf("\n");
  }
}

TEST_F(libyuvTest, Transpose) {
  int iw, ih, ow, oh;
  int err = 0;
  iw = benchmark_width_;
  ih = benchmark_height_;
  int i;
  ow = ih;
  oh = iw;

  align_buffer_64(input, iw * ih)
  align_buffer_64(output_1, ow * oh)
  align_buffer_64(output_2, iw * ih)

  for (i = 0; i < iw * ih; ++i) {
    input[i] = i;
  }

  TransposePlane(input,    iw, output_1, ow, iw, ih);
  TransposePlane(output_1, ow, output_2, oh, ow, oh);

  for (i = 0; i < iw * ih; ++i) {
    if (input[i] != output_2[i]) {
      err++;
    }
  }

  if (err) {
    printf("input %dx%d \n", iw, ih);
    PrintArray(input, iw, ih);

    printf("transpose 1\n");
    PrintArray(output_1, ow, oh);

    printf("transpose 2\n");
    PrintArray(output_2, iw, ih);
  }

  free_aligned_buffer_64(input)
  free_aligned_buffer_64(output_1)
  free_aligned_buffer_64(output_2)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, TransposeUV) {
  int iw, ih, ow, oh;
  int err = 0;
  iw = benchmark_width_;
  ih = benchmark_height_;
  int i;

  ow = ih;
  oh = iw;

  align_buffer_64(input, 2 * iw * ih)
  align_buffer_64(output_a1, ow * oh)
  align_buffer_64(output_b1, ow * oh)
  align_buffer_64(output_a2, iw * ih)
  align_buffer_64(output_b2, iw * ih)

  for (i = 0; i < 2 * iw * ih; i += 2) {
    input[i] = i >> 1;
    input[i + 1] = -(i >> 1);
  }

  TransposeUV(input, iw * 2, output_a1, ow, output_b1, ow, iw, ih);

  TransposePlane(output_a1, ow, output_a2, oh, ow, oh);
  TransposePlane(output_b1, ow, output_b2, oh, ow, oh);

  for (i = 0; i < 2 * iw * ih; i += 2) {
    if (input[i] != output_a2[i >> 1]) {
      err++;
    }
    if (input[i + 1] != output_b2[i >> 1]) {
      err++;
    }
  }

  if (err) {
    printf("input %dx%d \n", iw, ih);
    PrintArray(input, iw, ih);

    printf("transpose 1\n");
    PrintArray(output_a1, ow, oh);
    PrintArray(output_b1, ow, oh);

    printf("transpose 2\n");
    PrintArray(output_a2, oh, ow);
    PrintArray(output_b2, oh, ow);
  }

  free_aligned_buffer_64(input)
  free_aligned_buffer_64(output_a1)
  free_aligned_buffer_64(output_b1)
  free_aligned_buffer_64(output_a2)
  free_aligned_buffer_64(output_b2)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, RotatePlane90) {
  int iw, ih, ow, oh;
  int err = 0;
  iw = benchmark_width_;
  ih = benchmark_height_;
  int i;

  ow = ih;
  oh = iw;

  align_buffer_64(input, iw * ih)
  align_buffer_64(output_0, iw * ih)
  align_buffer_64(output_90, ow * oh)
  align_buffer_64(output_180, iw * ih)
  align_buffer_64(output_270, ow * oh)

  for (i = 0; i < iw * ih; ++i) {
    input[i] = i;
  }

  RotatePlane90(input,      iw, output_90,  ow, iw, ih);
  RotatePlane90(output_90,  ow, output_180, oh, ow, oh);
  RotatePlane90(output_180, oh, output_270, ow, oh, ow);
  RotatePlane90(output_270, ow, output_0,   iw, ow, oh);

  for (i = 0; i < iw * ih; ++i) {
    if (input[i] != output_0[i]) {
      err++;
    }
  }

  if (err) {
    printf("input %dx%d \n", iw, ih);
    PrintArray(input, iw, ih);

    printf("output 90\n");
    PrintArray(output_90, ow, oh);

    printf("output 180\n");
    PrintArray(output_180, iw, ih);

    printf("output 270\n");
    PrintArray(output_270, ow, oh);

    printf("output 0\n");
    PrintArray(output_0, iw, ih);
  }

  free_aligned_buffer_64(input)
  free_aligned_buffer_64(output_0)
  free_aligned_buffer_64(output_90)
  free_aligned_buffer_64(output_180)
  free_aligned_buffer_64(output_270)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, RotateUV90) {
  int iw, ih, ow, oh;
  int err = 0;
  iw = benchmark_width_;
  ih = benchmark_height_;
  int i;

  ow = ih;
  oh = (iw + 1) / 2;

  align_buffer_64(input, iw * ih)
  align_buffer_64(output_0_u, ow * oh)
  align_buffer_64(output_0_v, ow * oh)
  align_buffer_64(output_90_u, ow * oh)
  align_buffer_64(output_90_v, ow * oh)
  align_buffer_64(output_180_u, ow * oh)
  align_buffer_64(output_180_v, ow * oh)

  for (i = 0; i < iw * ih; i += 2) {
    input[i] = i >> 1;
    input[i + 1] = -(i >> 1);
  }

  RotateUV90(input, iw, output_90_u, ow, output_90_v, ow, (iw + 1) / 2, ih);

  RotatePlane90(output_90_u, ow, output_180_u, oh, ow, oh);
  RotatePlane90(output_90_v, ow, output_180_v, oh, ow, oh);

  RotatePlane180(output_180_u, ow, output_0_u, ow, ow, oh);
  RotatePlane180(output_180_v, ow, output_0_v, ow, ow, oh);

  for (i = 0; i < (ow * oh); ++i) {
    if (output_0_u[i] != (uint8)i) {
      err++;
    }
    if (output_0_v[i] != (uint8)(-i)) {
      err++;
    }
  }

  if (err) {
    printf("input %dx%d \n", iw, ih);
    PrintArray(input, iw, ih);

    printf("output 90_u\n");
    PrintArray(output_90_u, ow, oh);

    printf("output 90_v\n");
    PrintArray(output_90_v, ow, oh);

    printf("output 180_u\n");
    PrintArray(output_180_u, oh, ow);

    printf("output 180_v\n");
    PrintArray(output_180_v, oh, ow);

    printf("output 0_u\n");
    PrintArray(output_0_u, oh, ow);

    printf("output 0_v\n");
    PrintArray(output_0_v, oh, ow);
  }

  free_aligned_buffer_64(input)
  free_aligned_buffer_64(output_0_u)
  free_aligned_buffer_64(output_0_v)
  free_aligned_buffer_64(output_90_u)
  free_aligned_buffer_64(output_90_v)
  free_aligned_buffer_64(output_180_u)
  free_aligned_buffer_64(output_180_v)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, RotateUV180) {
  int iw, ih, ow, oh;
  int err = 0;
  iw = benchmark_width_;
  ih = benchmark_height_;
  int i;

  ow = (iw + 1) / 2;
  oh = ih;

  align_buffer_64(input, iw * ih)
  align_buffer_64(output_0_u, ow * oh)
  align_buffer_64(output_0_v, ow * oh)
  align_buffer_64(output_90_u, ow * oh)
  align_buffer_64(output_90_v, ow * oh)
  align_buffer_64(output_180_u, ow * oh)
  align_buffer_64(output_180_v, ow * oh)

  for (i = 0; i < iw * ih; i += 2) {
    input[i] = i >> 1;
    input[i + 1] = -(i >> 1);
  }

  RotateUV180(input, iw, output_180_u, ow, output_180_v, ow, (iw + 1) / 2, ih);

  RotatePlane90(output_180_u, ow, output_90_u, oh, ow, oh);
  RotatePlane90(output_180_v, ow, output_90_v, oh, ow, oh);

  RotatePlane90(output_90_u, oh, output_0_u, ow, oh, ow);
  RotatePlane90(output_90_v, oh, output_0_v, ow, oh, ow);

  for (i = 0; i < (ow * oh); ++i) {
    if (output_0_u[i] != (uint8)i) {
      err++;
    }
    if (output_0_v[i] != (uint8)(-i)) {
      err++;
    }
  }

  if (err) {
    printf("input %dx%d \n", iw, ih);
    PrintArray(input, iw, ih);

    printf("output 180_u\n");
    PrintArray(output_180_u, oh, ow);

    printf("output 180_v\n");
    PrintArray(output_180_v, oh, ow);

    printf("output 90_u\n");
    PrintArray(output_90_u, oh, ow);

    printf("output 90_v\n");
    PrintArray(output_90_v, oh, ow);

    printf("output 0_u\n");
    PrintArray(output_0_u, ow, oh);

    printf("output 0_v\n");
    PrintArray(output_0_v, ow, oh);
  }

  free_aligned_buffer_64(input)
  free_aligned_buffer_64(output_0_u)
  free_aligned_buffer_64(output_0_v)
  free_aligned_buffer_64(output_90_u)
  free_aligned_buffer_64(output_90_v)
  free_aligned_buffer_64(output_180_u)
  free_aligned_buffer_64(output_180_v)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, RotateUV270) {
  int iw, ih, ow, oh;
  int err = 0;
  iw = benchmark_width_;
  ih = benchmark_height_;
  int i;

  ow = ih;
  oh = (iw + 1) / 2;

  align_buffer_64(input, iw * ih)
  align_buffer_64(output_0_u, ow * oh)
  align_buffer_64(output_0_v, ow * oh)
  align_buffer_64(output_270_u, ow * oh)
  align_buffer_64(output_270_v, ow * oh)
  align_buffer_64(output_180_u, ow * oh)
  align_buffer_64(output_180_v, ow * oh)

  for (i = 0; i < iw * ih; i += 2) {
    input[i] = i >> 1;
    input[i + 1] = -(i >> 1);
  }

  RotateUV270(input, iw, output_270_u, ow, output_270_v, ow,
                   (iw + 1) / 2, ih);

  RotatePlane270(output_270_u, ow, output_180_u, oh, ow, oh);
  RotatePlane270(output_270_v, ow, output_180_v, oh, ow, oh);

  RotatePlane180(output_180_u, ow, output_0_u, ow, ow, oh);
  RotatePlane180(output_180_v, ow, output_0_v, ow, ow, oh);

  for (i = 0; i < (ow * oh); ++i) {
    if (output_0_u[i] != (uint8)i) {
      err++;
    }
    if (output_0_v[i] != (uint8)(-i)) {
      err++;
    }
  }

  if (err) {
    printf("input %dx%d \n", iw, ih);
    PrintArray(input, iw, ih);

    printf("output 270_u\n");
    PrintArray(output_270_u, ow, oh);

    printf("output 270_v\n");
    PrintArray(output_270_v, ow, oh);

    printf("output 180_u\n");
    PrintArray(output_180_u, oh, ow);

    printf("output 180_v\n");
    PrintArray(output_180_v, oh, ow);

    printf("output 0_u\n");
    PrintArray(output_0_u, oh, ow);

    printf("output 0_v\n");
    PrintArray(output_0_v, oh, ow);
  }

  free_aligned_buffer_64(input)
  free_aligned_buffer_64(output_0_u)
  free_aligned_buffer_64(output_0_v)
  free_aligned_buffer_64(output_270_u)
  free_aligned_buffer_64(output_270_v)
  free_aligned_buffer_64(output_180_u)
  free_aligned_buffer_64(output_180_v)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, RotatePlane180) {
  int iw, ih, ow, oh;
  int err = 0;
  iw = benchmark_width_;
  ih = benchmark_height_;
  int i;

  ow = iw;
  oh = ih;

  align_buffer_64(input, iw * ih)
  align_buffer_64(output_0, iw * ih)
  align_buffer_64(output_180, iw * ih)

  for (i = 0; i < iw * ih; ++i) {
    input[i] = i;
  }

  RotatePlane180(input,      iw, output_180, ow, iw, ih);
  RotatePlane180(output_180, ow, output_0,   iw, ow, oh);

  for (i = 0; i < iw * ih; ++i) {
    if (input[i] != output_0[i]) {
      err++;
    }
  }

  if (err) {
    printf("input %dx%d \n", iw, ih);
    PrintArray(input, iw, ih);

    printf("output 180\n");
    PrintArray(output_180, iw, ih);

    printf("output 0\n");
    PrintArray(output_0, iw, ih);
  }

  free_aligned_buffer_64(input)
  free_aligned_buffer_64(output_0)
  free_aligned_buffer_64(output_180)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, RotatePlane270) {
  int iw, ih, ow, oh;
  int err = 0;
  iw = benchmark_width_;
  ih = benchmark_height_;
  int i;

  ow = ih;
  oh = iw;

  align_buffer_64(input, iw * ih)
  align_buffer_64(output_0, iw * ih)
  align_buffer_64(output_90, ow * oh)
  align_buffer_64(output_180, iw * ih)
  align_buffer_64(output_270, ow * oh)

  for (i = 0; i < iw * ih; ++i)
    input[i] = i;

  RotatePlane270(input,      iw, output_270, ow, iw, ih);
  RotatePlane270(output_270, ow, output_180, oh, ow, oh);
  RotatePlane270(output_180, oh, output_90,  ow, oh, ow);
  RotatePlane270(output_90,  ow, output_0,   iw, ow, oh);

  for (i = 0; i < iw * ih; ++i) {
    if (input[i] != output_0[i]) {
      err++;
    }
  }

  if (err) {
    printf("input %dx%d \n", iw, ih);
    PrintArray(input, iw, ih);

    printf("output 270\n");
    PrintArray(output_270, ow, oh);

    printf("output 180\n");
    PrintArray(output_180, iw, ih);

    printf("output 90\n");
    PrintArray(output_90, ow, oh);

    printf("output 0\n");
    PrintArray(output_0, iw, ih);
  }

  free_aligned_buffer_64(input)
  free_aligned_buffer_64(output_0)
  free_aligned_buffer_64(output_90)
  free_aligned_buffer_64(output_180)
  free_aligned_buffer_64(output_270)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, RotatePlane90and270) {
  int iw, ih, ow, oh;
  int err = 0;
  iw = benchmark_width_;
  ih = benchmark_height_;
  int i;

  ow = ih;
  oh = iw;

  align_buffer_64(input, iw * ih)
  align_buffer_64(output_0, iw * ih)
  align_buffer_64(output_90, ow * oh)

  for (i = 0; i < iw * ih; ++i) {
    input[i] = i;
  }

  RotatePlane90(input,      iw, output_90,  ow, iw, ih);
  RotatePlane270(output_90, ow, output_0,   iw, ow, oh);

  for (i = 0; i < iw * ih; ++i) {
    if (input[i] != output_0[i]) {
      err++;
    }
  }

  if (err) {
    printf("intput %dx%d\n", iw, ih);
    PrintArray(input, iw, ih);

    printf("output \n");
    PrintArray(output_90, ow, oh);

    printf("output \n");
    PrintArray(output_0, iw, ih);
  }

  free_aligned_buffer_64(input)
  free_aligned_buffer_64(output_0)
  free_aligned_buffer_64(output_90)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, RotatePlane90Pitch) {
  int iw, ih;
  int err = 0;
  iw = benchmark_width_;
  ih = benchmark_height_;
  int i;

  int ow = ih;
  int oh = iw;

  align_buffer_64(input, iw * ih)
  align_buffer_64(output_0, iw * ih)
  align_buffer_64(output_90, ow * oh)

  for (i = 0; i < iw * ih; ++i) {
    input[i] = i;
  }

  RotatePlane90(input, iw,
                output_90 + (ow + 1) / 2, ow,
                (iw + 1) / 2, (ih + 1) / 2);
  RotatePlane90(input + ((iw + 1) / 2), iw,
                output_90 + (ow + 1) / 2 + ow * ((oh + 1) / 2), ow,
                (iw + 1) / 2, (ih + 1) / 2);
  RotatePlane90(input + iw * ((ih + 1) / 2), iw,
                output_90, ow,
                (iw + 1) / 2, (ih + 1) / 2);
  RotatePlane90(input + ((iw + 1) / 2) + iw * ((ih + 1) / 2), iw,
                output_90 + ow * ((oh + 1) / 2), ow,
                (iw + 1) / 2, (ih + 1) / 2);

  RotatePlane270(output_90, ih, output_0,   iw, ow, oh);

  for (i = 0; i < iw * ih; ++i) {
    if (input[i] != output_0[i]) {
      err++;
    }
  }

  if (err) {
    printf("intput %dx%d\n", iw, ih);
    PrintArray(input, iw, ih);

    printf("output \n");
    PrintArray(output_90, ow, oh);

    printf("output \n");
    PrintArray(output_0, iw, ih);
  }

  free_aligned_buffer_64(input)
  free_aligned_buffer_64(output_0)
  free_aligned_buffer_64(output_90)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, RotatePlane270Pitch) {
  int iw, ih, ow, oh;
  int err = 0;
  iw = benchmark_width_;
  ih = benchmark_height_;
  int i;

  ow = ih;
  oh = iw;

  align_buffer_64(input, iw * ih)
  align_buffer_64(output_0, iw * ih)
  align_buffer_64(output_270, ow * oh)

  for (i = 0; i < iw * ih; ++i) {
    input[i] = i;
  }

  RotatePlane270(input, iw,
                 output_270 + ow * ((oh + 1) / 2), ow,
                 (iw + 1) / 2, (ih + 1) / 2);
  RotatePlane270(input + ((iw + 1) / 2), iw,
                 output_270, ow,
                 (iw + 1) / 2, (ih + 1) / 2);
  RotatePlane270(input + iw * ((ih + 1) / 2), iw,
                 output_270 + (ow + 1) / 2 + ow * ((oh + 1) / 2), ow,
                 (iw + 1) / 2, (ih + 1) / 2);
  RotatePlane270(input + ((iw + 1) / 2) + iw * ((ih + 1) / 2), iw,
                 output_270 + (ow + 1) / 2, ow,
                 (iw + 1) / 2, (ih + 1) / 2);

  RotatePlane90(output_270, ih, output_0,   iw, ow, oh);

  for (i = 0; i < iw * ih; ++i) {
    if (input[i] != output_0[i]) {
      err++;
    }
  }

  if (err) {
    printf("intput %dx%d\n", iw, ih);
    PrintArray(input, iw, ih);

    printf("output \n");
    PrintArray(output_270, ow, oh);

    printf("output \n");
    PrintArray(output_0, iw, ih);
  }

  free_aligned_buffer_64(input)
  free_aligned_buffer_64(output_0)
  free_aligned_buffer_64(output_270)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, I420Rotate90) {
  int err = 0;

  int yw = benchmark_width_;
  int yh = benchmark_height_;
  int b = 128;
  int uvw = (yw + 1) / 2;
  int uvh = (yh + 1) / 2;

  int i, j;

  int y_plane_size = (yw + b * 2) * (yh + b * 2);
  int uv_plane_size = (uvw + b * 2) * (uvh + b * 2);

  srandom(time(NULL));

  align_buffer_64(orig_y, y_plane_size)
  align_buffer_64(orig_u, uv_plane_size)
  align_buffer_64(orig_v, uv_plane_size)
  align_buffer_64(ro0_y, y_plane_size)
  align_buffer_64(ro0_u, uv_plane_size)
  align_buffer_64(ro0_v, uv_plane_size)
  align_buffer_64(ro90_y, y_plane_size)
  align_buffer_64(ro90_u, uv_plane_size)
  align_buffer_64(ro90_v, uv_plane_size)
  align_buffer_64(ro270_y, y_plane_size)
  align_buffer_64(ro270_u, uv_plane_size)
  align_buffer_64(ro270_v, uv_plane_size)
  memset(orig_y, 0, y_plane_size);
  memset(orig_u, 0, uv_plane_size);
  memset(orig_v, 0, uv_plane_size);
  memset(ro0_y, 0, y_plane_size);
  memset(ro0_u, 0, uv_plane_size);
  memset(ro0_v, 0, uv_plane_size);
  memset(ro90_y, 0, y_plane_size);
  memset(ro90_u, 0, uv_plane_size);
  memset(ro90_v, 0, uv_plane_size);
  memset(ro270_y, 0, y_plane_size);
  memset(ro270_u, 0, uv_plane_size);
  memset(ro270_v, 0, uv_plane_size);

  // fill image buffers with random data
  for (i = b; i < (yh + b); ++i) {
    for (j = b; j < (yw + b); ++j) {
      orig_y[i * (yw + b * 2) + j] = random() & 0xff;
    }
  }

  for (i = b; i < (uvh + b); ++i) {
    for (j = b; j < (uvw + b); ++j) {
      orig_u[i * (uvw + b * 2) + j] = random() & 0xff;
      orig_v[i * (uvw + b * 2) + j] = random() & 0xff;
    }
  }

  int y_off_0 = b * (yw + b * 2) + b;
  int uv_off_0 = b * (uvw + b * 2) + b;
  int y_off_90 = b * (yh + b * 2) + b;
  int uv_off_90 = b * (uvh + b * 2) + b;

  int y_st_0 = yw + b * 2;
  int uv_st_0 = uvw + b * 2;
  int y_st_90 = yh + b * 2;
  int uv_st_90 = uvh + b * 2;

  I420Rotate(orig_y + y_off_0, y_st_0,
             orig_u + uv_off_0, uv_st_0,
             orig_v + uv_off_0, uv_st_0,
             ro90_y + y_off_90, y_st_90,
             ro90_u + uv_off_90, uv_st_90,
             ro90_v + uv_off_90, uv_st_90,
             yw, yh,
             kRotateClockwise);

  I420Rotate(ro90_y + y_off_90, y_st_90,
             ro90_u + uv_off_90, uv_st_90,
             ro90_v + uv_off_90, uv_st_90,
             ro270_y + y_off_90, y_st_90,
             ro270_u + uv_off_90, uv_st_90,
             ro270_v + uv_off_90, uv_st_90,
             yh, yw,
             kRotate180);

  I420Rotate(ro270_y + y_off_90, y_st_90,
             ro270_u + uv_off_90, uv_st_90,
             ro270_v + uv_off_90, uv_st_90,
             ro0_y + y_off_0, y_st_0,
             ro0_u + uv_off_0, uv_st_0,
             ro0_v + uv_off_0, uv_st_0,
             yh, yw,
             kRotateClockwise);

  for (i = 0; i < y_plane_size; ++i) {
    if (orig_y[i] != ro0_y[i]) {
      ++err;
    }
  }

  for (i = 0; i < uv_plane_size; ++i) {
    if (orig_u[i] != ro0_u[i]) {
      ++err;
    }
    if (orig_v[i] != ro0_v[i]) {
      ++err;
    }
  }

  free_aligned_buffer_64(orig_y)
  free_aligned_buffer_64(orig_u)
  free_aligned_buffer_64(orig_v)
  free_aligned_buffer_64(ro0_y)
  free_aligned_buffer_64(ro0_u)
  free_aligned_buffer_64(ro0_v)
  free_aligned_buffer_64(ro90_y)
  free_aligned_buffer_64(ro90_u)
  free_aligned_buffer_64(ro90_v)
  free_aligned_buffer_64(ro270_y)
  free_aligned_buffer_64(ro270_u)
  free_aligned_buffer_64(ro270_v)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, I420Rotate270) {
  int err = 0;

  int yw = benchmark_width_;
  int yh = benchmark_height_;
  int b = 128;
  int uvw = (yw + 1) / 2;
  int uvh = (yh + 1) / 2;

  int i, j;

  int y_plane_size = (yw + b * 2) * (yh + b * 2);
  int uv_plane_size = (uvw + b * 2) * (uvh + b * 2);

  srandom(time(NULL));

  align_buffer_64(orig_y, y_plane_size)
  align_buffer_64(orig_u, uv_plane_size)
  align_buffer_64(orig_v, uv_plane_size)
  align_buffer_64(ro0_y, y_plane_size)
  align_buffer_64(ro0_u, uv_plane_size)
  align_buffer_64(ro0_v, uv_plane_size)
  align_buffer_64(ro90_y, y_plane_size)
  align_buffer_64(ro90_u, uv_plane_size)
  align_buffer_64(ro90_v, uv_plane_size)
  align_buffer_64(ro270_y, y_plane_size)
  align_buffer_64(ro270_u, uv_plane_size)
  align_buffer_64(ro270_v, uv_plane_size)
  memset(orig_y, 0, y_plane_size);
  memset(orig_u, 0, uv_plane_size);
  memset(orig_v, 0, uv_plane_size);
  memset(ro0_y, 0, y_plane_size);
  memset(ro0_u, 0, uv_plane_size);
  memset(ro0_v, 0, uv_plane_size);
  memset(ro90_y, 0, y_plane_size);
  memset(ro90_u, 0, uv_plane_size);
  memset(ro90_v, 0, uv_plane_size);
  memset(ro270_y, 0, y_plane_size);
  memset(ro270_u, 0, uv_plane_size);
  memset(ro270_v, 0, uv_plane_size);

  // fill image buffers with random data
  for (i = b; i < (yh + b); ++i) {
    for (j = b; j < (yw + b); ++j) {
      orig_y[i * (yw + b * 2) + j] = random() & 0xff;
    }
  }

  for (i = b; i < (uvh + b); ++i) {
    for (j = b; j < (uvw + b); ++j) {
      orig_u[i * (uvw + b * 2) + j] = random() & 0xff;
      orig_v[i * (uvw + b * 2) + j] = random() & 0xff;
    }
  }

  int y_off_0 = b * (yw + b * 2) + b;
  int uv_off_0 = b * (uvw + b * 2) + b;
  int y_off_90 = b * (yh + b * 2) + b;
  int uv_off_90 = b * (uvh + b * 2) + b;

  int y_st_0 = yw + b * 2;
  int uv_st_0 = uvw + b * 2;
  int y_st_90 = yh + b * 2;
  int uv_st_90 = uvh + b * 2;

  I420Rotate(orig_y + y_off_0, y_st_0,
             orig_u + uv_off_0, uv_st_0,
             orig_v + uv_off_0, uv_st_0,
             ro270_y + y_off_90, y_st_90,
             ro270_u + uv_off_90, uv_st_90,
             ro270_v + uv_off_90, uv_st_90,
             yw, yh,
             kRotateCounterClockwise);

  I420Rotate(ro270_y + y_off_90, y_st_90,
             ro270_u + uv_off_90, uv_st_90,
             ro270_v + uv_off_90, uv_st_90,
             ro90_y + y_off_90, y_st_90,
             ro90_u + uv_off_90, uv_st_90,
             ro90_v + uv_off_90, uv_st_90,
             yh, yw,
             kRotate180);

  I420Rotate(ro90_y + y_off_90, y_st_90,
             ro90_u + uv_off_90, uv_st_90,
             ro90_v + uv_off_90, uv_st_90,
             ro0_y + y_off_0, y_st_0,
             ro0_u + uv_off_0, uv_st_0,
             ro0_v + uv_off_0, uv_st_0,
             yh, yw,
             kRotateCounterClockwise);

  for (i = 0; i < y_plane_size; ++i) {
    if (orig_y[i] != ro0_y[i]) {
      ++err;
    }
  }

  for (i = 0; i < uv_plane_size; ++i) {
    if (orig_u[i] != ro0_u[i]) {
      ++err;
    }
    if (orig_v[i] != ro0_v[i]) {
      ++err;
    }
  }

  free_aligned_buffer_64(orig_y)
  free_aligned_buffer_64(orig_u)
  free_aligned_buffer_64(orig_v)
  free_aligned_buffer_64(ro0_y)
  free_aligned_buffer_64(ro0_u)
  free_aligned_buffer_64(ro0_v)
  free_aligned_buffer_64(ro90_y)
  free_aligned_buffer_64(ro90_u)
  free_aligned_buffer_64(ro90_v)
  free_aligned_buffer_64(ro270_y)
  free_aligned_buffer_64(ro270_u)
  free_aligned_buffer_64(ro270_v)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, NV12ToI420Rotate90) {
  int err = 0;

  int yw = benchmark_width_;
  int yh = benchmark_height_;
  int b = 128;
  int uvw = (yw + 1) / 2;
  int uvh = (yh + 1) / 2;
  int i, j;

  int y_plane_size = (yw + b * 2) * (yh + b * 2);
  int uv_plane_size = (uvw + b * 2) * (uvh + b * 2);
  int nv_uv_plane_size = (uvw * 2 + b * 2) * (uvh + b * 2);

  srandom(time(NULL));

  align_buffer_64(orig_y, y_plane_size)
  align_buffer_64(orig_uv, nv_uv_plane_size)
  align_buffer_64(ro0_y, y_plane_size)
  align_buffer_64(ro0_u, uv_plane_size)
  align_buffer_64(ro0_v, uv_plane_size)
  align_buffer_64(ro90_y, y_plane_size)
  align_buffer_64(ro90_u, uv_plane_size)
  align_buffer_64(ro90_v, uv_plane_size)
  memset(orig_y, 0, y_plane_size);
  memset(orig_uv, 0, uv_plane_size);
  memset(ro0_y, 0, y_plane_size);
  memset(ro0_u, 0, uv_plane_size);
  memset(ro0_v, 0, uv_plane_size);
  memset(ro90_y, 0, y_plane_size);
  memset(ro90_u, 0, uv_plane_size);
  memset(ro90_v, 0, uv_plane_size);

  // fill image buffers with random data
  for (i = b; i < (yh + b); ++i) {
    for (j = b; j < (yw + b); ++j) {
      orig_y[i * (yw + b * 2) + j] = random() & 0xff;
    }
  }

  for (i = b; i < (uvh + b); ++i) {
    for (j = b; j < (uvw * 2 + b); j += 2) {
      uint8 random_number = random() & 0x7f;
      orig_uv[i * (uvw * 2 + b * 2) + j] = random_number;
      orig_uv[i * (uvw * 2 + b * 2) + j + 1] = -random_number;
    }
  }

  int y_off_0 = b * (yw + b * 2) + b;
  int uv_off_0 = b * (uvw + b * 2) + b;
  int y_off_90 = b * (yh + b * 2) + b;
  int uv_off_90 = b * (uvh + b * 2) + b;

  int y_st_0 = yw + b * 2;
  int uv_st_0 = uvw + b * 2;
  int y_st_90 = yh + b * 2;
  int uv_st_90 = uvh + b * 2;

  NV12ToI420Rotate(orig_y + y_off_0, y_st_0,
                   orig_uv + y_off_0, y_st_0,
                   ro90_y + y_off_90, y_st_90,
                   ro90_u + uv_off_90, uv_st_90,
                   ro90_v + uv_off_90, uv_st_90,
                   yw, yh,
                   kRotateClockwise);

  I420Rotate(ro90_y + y_off_90, y_st_90,
             ro90_u + uv_off_90, uv_st_90,
             ro90_v + uv_off_90, uv_st_90,
             ro0_y + y_off_0, y_st_0,
             ro0_u + uv_off_0, uv_st_0,
             ro0_v + uv_off_0, uv_st_0,
             yh, yw,
             kRotateCounterClockwise);

  for (i = 0; i < y_plane_size; ++i) {
    if (orig_y[i] != ro0_y[i])
      ++err;
  }

  int zero_cnt = 0;

  for (i = 0; i < uv_plane_size; ++i) {
    if ((signed char)ro0_u[i] != -(signed char)ro0_v[i]) {
      ++err;
    }
    if (ro0_u[i] != 0) {
      ++zero_cnt;
    }
  }

  if (!zero_cnt) {
    ++err;
  }

  free_aligned_buffer_64(orig_y)
  free_aligned_buffer_64(orig_uv)
  free_aligned_buffer_64(ro0_y)
  free_aligned_buffer_64(ro0_u)
  free_aligned_buffer_64(ro0_v)
  free_aligned_buffer_64(ro90_y)
  free_aligned_buffer_64(ro90_u)
  free_aligned_buffer_64(ro90_v)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, NV12ToI420Rotate270) {
  int err = 0;

  int yw = benchmark_width_;
  int yh = benchmark_height_;
  int b = 128;
  int uvw = (yw + 1) / 2;
  int uvh = (yh + 1) / 2;

  int i, j;

  int y_plane_size = (yw + b * 2) * (yh + b * 2);
  int uv_plane_size = (uvw + b * 2) * (uvh + b * 2);
  int nv_uv_plane_size = (uvw * 2 + b * 2) * (uvh + b * 2);

  srandom(time(NULL));

  align_buffer_64(orig_y, y_plane_size)
  align_buffer_64(orig_uv, nv_uv_plane_size)
  align_buffer_64(ro0_y, y_plane_size)
  align_buffer_64(ro0_u, uv_plane_size)
  align_buffer_64(ro0_v, uv_plane_size)
  align_buffer_64(ro270_y, y_plane_size)
  align_buffer_64(ro270_u, uv_plane_size)
  align_buffer_64(ro270_v, uv_plane_size)
  memset(orig_y, 0, y_plane_size);
  memset(orig_uv, 0, nv_uv_plane_size);
  memset(ro0_y, 0, y_plane_size);
  memset(ro0_u, 0, uv_plane_size);
  memset(ro0_v, 0, uv_plane_size);
  memset(ro270_y, 0, y_plane_size);
  memset(ro270_u, 0, uv_plane_size);
  memset(ro270_v, 0, uv_plane_size);

  // fill image buffers with random data
  for (i = b; i < (yh + b); ++i) {
    for (j = b; j < (yw + b); ++j) {
      orig_y[i * (yw + b * 2) + j] = random() & 0xff;
    }
  }

  for (i = b; i < (uvh + b); ++i) {
    for (j = b; j < (uvw * 2 + b); j += 2) {
      uint8 random_number = random() & 0x7f;
      orig_uv[i * (uvw * 2 + b * 2) + j] = random_number;
      orig_uv[i * (uvw * 2 + b * 2) + j + 1] = -random_number;
    }
  }

  int y_off_0 = b * (yw + b * 2) + b;
  int uv_off_0 = b * (uvw + b * 2) + b;
  int y_off_270 = b * (yh + b * 2) + b;
  int uv_off_270 = b * (uvh + b * 2) + b;

  int y_st_0 = yw + b * 2;
  int uv_st_0 = uvw + b * 2;
  int y_st_270 = yh + b * 2;
  int uv_st_270 = uvh + b * 2;

  NV12ToI420Rotate(orig_y + y_off_0, y_st_0,
                   orig_uv + y_off_0, y_st_0,
                   ro270_y + y_off_270, y_st_270,
                   ro270_u + uv_off_270, uv_st_270,
                   ro270_v + uv_off_270, uv_st_270,
                   yw, yh,
                   kRotateCounterClockwise);

  I420Rotate(ro270_y + y_off_270, y_st_270,
             ro270_u + uv_off_270, uv_st_270,
             ro270_v + uv_off_270, uv_st_270,
             ro0_y + y_off_0, y_st_0,
             ro0_u + uv_off_0, uv_st_0,
             ro0_v + uv_off_0, uv_st_0,
             yh, yw,
             kRotateClockwise);

  for (i = 0; i < y_plane_size; ++i) {
    if (orig_y[i] != ro0_y[i])
      ++err;
  }

  int zero_cnt = 0;

  for (i = 0; i < uv_plane_size; ++i) {
    if ((signed char)ro0_u[i] != -(signed char)ro0_v[i]) {
      ++err;
    }
    if (ro0_u[i] != 0) {
      ++zero_cnt;
    }
  }

  if (!zero_cnt) {
    ++err;
  }

  free_aligned_buffer_64(orig_y)
  free_aligned_buffer_64(orig_uv)
  free_aligned_buffer_64(ro0_y)
  free_aligned_buffer_64(ro0_u)
  free_aligned_buffer_64(ro0_v)
  free_aligned_buffer_64(ro270_y)
  free_aligned_buffer_64(ro270_u)
  free_aligned_buffer_64(ro270_v)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, NV12ToI420Rotate180) {
  int err = 0;

  int yw = benchmark_width_;
  int yh = benchmark_height_;
  int b = 128;
  int uvw = (yw + 1) / 2;
  int uvh = (yh + 1) / 2;

  int i, j;

  int y_plane_size = (yw + b * 2) * (yh + b * 2);
  int uv_plane_size = (uvw + b * 2) * (uvh + b * 2);
  int nv_uv_plane_size = (uvw * 2 + b * 2) * (uvh + b * 2);

  srandom(time(NULL));

  align_buffer_64(orig_y, y_plane_size)
  align_buffer_64(orig_uv, nv_uv_plane_size)
  align_buffer_64(ro0_y, y_plane_size)
  align_buffer_64(ro0_u, uv_plane_size)
  align_buffer_64(ro0_v, uv_plane_size)
  align_buffer_64(ro180_y, y_plane_size)
  align_buffer_64(ro180_u, uv_plane_size)
  align_buffer_64(ro180_v, uv_plane_size)
  memset(orig_y, 0, y_plane_size);
  memset(orig_uv, 0, nv_uv_plane_size);
  memset(ro0_y, 0, y_plane_size);
  memset(ro0_u, 0, uv_plane_size);
  memset(ro0_v, 0, uv_plane_size);
  memset(ro180_y, 0, y_plane_size);
  memset(ro180_u, 0, uv_plane_size);
  memset(ro180_v, 0, uv_plane_size);

  // fill image buffers with random data
  for (i = b; i < (yh + b); ++i) {
    for (j = b; j < (yw + b); ++j) {
      orig_y[i * (yw + b * 2) + j] = random() & 0xff;
    }
  }

  for (i = b; i < (uvh + b); ++i) {
    for (j = b; j < (uvw * 2 + b); j += 2) {
      uint8 random_number = random() & 0x7f;
      orig_uv[i * (uvw * 2 + b * 2) + j] = random_number;
      orig_uv[i * (uvw * 2 + b * 2) + j + 1] = -random_number;
    }
  }

  int y_off = b * (yw + b * 2) + b;
  int uv_off = b * (uvw + b * 2) + b;
  // TODO(fbarchard): rename to y_stride.
  int y_st = yw + b * 2;
  int uv_st = uvw + b * 2;

  NV12ToI420Rotate(orig_y + y_off, y_st,
                   orig_uv + y_off, y_st,
                   ro180_y + y_off, y_st,
                   ro180_u + uv_off, uv_st,
                   ro180_v + uv_off, uv_st,
                   yw, yh,
                   kRotate180);

  I420Rotate(ro180_y + y_off, y_st,
             ro180_u + uv_off, uv_st,
             ro180_v + uv_off, uv_st,
             ro0_y + y_off, y_st,
             ro0_u + uv_off, uv_st,
             ro0_v + uv_off, uv_st,
             yw, yh,
             kRotate180);

  for (i = 0; i < y_plane_size; ++i) {
    if (orig_y[i] != ro0_y[i]) {
      ++err;
    }
  }

  int zero_cnt = 0;

  for (i = 0; i < uv_plane_size; ++i) {
    if ((signed char)ro0_u[i] != -(signed char)ro0_v[i]) {
      ++err;
    }
    if (ro0_u[i] != 0) {
      ++zero_cnt;
    }
  }

  if (!zero_cnt) {
    ++err;
  }

  free_aligned_buffer_64(orig_y)
  free_aligned_buffer_64(orig_uv)
  free_aligned_buffer_64(ro0_y)
  free_aligned_buffer_64(ro0_u)
  free_aligned_buffer_64(ro0_v)
  free_aligned_buffer_64(ro180_y)
  free_aligned_buffer_64(ro180_u)
  free_aligned_buffer_64(ro180_v)

  EXPECT_EQ(0, err);
}

TEST_F(libyuvTest, NV12ToI420RotateNegHeight90) {
  int y_err = 0, uv_err = 0;

  int yw = benchmark_width_;
  int yh = benchmark_height_;
  int b = 128;
  int uvw = (yw + 1) / 2;
  int uvh = (yh + 1) / 2;
  int i, j;

  int y_plane_size = (yw + b * 2) * (yh + b * 2);
  int uv_plane_size = (uvw + b * 2) * (uvh + b * 2);
  int nv_uv_plane_size = (uvw * 2 + b * 2) * (uvh + b * 2);

  srandom(time(NULL));

  align_buffer_64(orig_y, y_plane_size)
  align_buffer_64(orig_uv, nv_uv_plane_size)
  align_buffer_64(roa_y, y_plane_size)
  align_buffer_64(roa_u, uv_plane_size)
  align_buffer_64(roa_v, uv_plane_size)
  align_buffer_64(rob_y, y_plane_size)
  align_buffer_64(rob_u, uv_plane_size)
  align_buffer_64(rob_v, uv_plane_size)
  align_buffer_64(roc_y, y_plane_size)
  align_buffer_64(roc_u, uv_plane_size)
  align_buffer_64(roc_v, uv_plane_size)
  memset(orig_y, 0, y_plane_size);
  memset(orig_uv, 0, nv_uv_plane_size);
  memset(roa_y, 0, y_plane_size);
  memset(roa_u, 0, uv_plane_size);
  memset(roa_v, 0, uv_plane_size);
  memset(rob_y, 0, y_plane_size);
  memset(rob_u, 0, uv_plane_size);
  memset(rob_v, 0, uv_plane_size);
  memset(roc_y, 0, y_plane_size);
  memset(roc_u, 0, uv_plane_size);
  memset(roc_v, 0, uv_plane_size);

  // fill image buffers with random data
  for (i = b; i < (yh + b); ++i) {
    for (j = b; j < (yw + b); ++j) {
      orig_y[i * (yw + b * 2) + j] = random() & 0xff;
    }
  }

  for (i = b; i < (uvh + b); ++i) {
    for (j = b; j < (uvw * 2 + b); j += 2) {
      uint8 random_number = random() & 0x7f;
      orig_uv[i * (uvw * 2 + b * 2) + j] = random_number;
      orig_uv[i * (uvw * 2 + b * 2) + j + 1] = -random_number;
    }
  }

  int y_off_0 = b * (yw + b * 2) + b;
  int uv_off_0 = b * (uvw + b * 2) + b;
  int y_off_90 = b * (yh + b * 2) + b;
  int uv_off_90 = b * (uvh + b * 2) + b;

  int y_st_0 = yw + b * 2;
  int uv_st_0 = uvw + b * 2;
  int y_st_90 = yh + b * 2;
  int uv_st_90 = uvh + b * 2;

  NV12ToI420Rotate(orig_y + y_off_0, y_st_0,
                   orig_uv + y_off_0, y_st_0,
                   roa_y + y_off_90, y_st_90,
                   roa_u + uv_off_90, uv_st_90,
                   roa_v + uv_off_90, uv_st_90,
                   yw, -yh,
                   kRotateClockwise);

  I420Rotate(roa_y + y_off_90, y_st_90,
             roa_u + uv_off_90, uv_st_90,
             roa_v + uv_off_90, uv_st_90,
             rob_y + y_off_0, y_st_0,
             rob_u + uv_off_0, uv_st_0,
             rob_v + uv_off_0, uv_st_0,
             yh, -yw,
             kRotateCounterClockwise);

  I420Rotate(rob_y + y_off_0, y_st_0,
             rob_u + uv_off_0, uv_st_0,
             rob_v + uv_off_0, uv_st_0,
             roc_y + y_off_0, y_st_0,
             roc_u + uv_off_0, uv_st_0,
             roc_v + uv_off_0, uv_st_0,
             yw, yh,
             kRotate180);

  for (i = 0; i < y_plane_size; ++i) {
    if (orig_y[i] != roc_y[i]) {
      ++y_err;
    }
  }

  if (y_err) {
    printf("input %dx%d \n", yw, yh);
    PrintArray(orig_y, y_st_0, yh + b * 2);

    printf("rotate a\n");
    PrintArray(roa_y, y_st_90, y_st_0);

    printf("rotate b\n");
    PrintArray(rob_y, y_st_90, y_st_0);

    printf("rotate c\n");
    PrintArray(roc_y, y_st_0, y_st_90);
  }

  int zero_cnt = 0;

  for (i = 0; i < uv_plane_size; ++i) {
    if ((signed char)roc_u[i] != -(signed char)roc_v[i]) {
      ++uv_err;
    }
    if (rob_u[i] != 0) {
      ++zero_cnt;
    }
  }

  if (!zero_cnt) {
    ++uv_err;
  }

  if (uv_err) {
    printf("input %dx%d \n", uvw * 2, uvh);
    PrintArray(orig_uv, y_st_0, uvh + b * 2);

    printf("rotate a\n");
    PrintArray(roa_u, uv_st_90, uv_st_0);
    PrintArray(roa_v, uv_st_90, uv_st_0);

    printf("rotate b\n");
    PrintArray(rob_u, uv_st_90, uv_st_0);
    PrintArray(rob_v, uv_st_90, uv_st_0);

    printf("rotate c\n");
    PrintArray(roc_u, uv_st_0, uv_st_90);
    PrintArray(roc_v, uv_st_0, uv_st_90);
  }

  free_aligned_buffer_64(orig_y)
  free_aligned_buffer_64(orig_uv)
  free_aligned_buffer_64(roa_y)
  free_aligned_buffer_64(roa_u)
  free_aligned_buffer_64(roa_v)
  free_aligned_buffer_64(rob_y)
  free_aligned_buffer_64(rob_u)
  free_aligned_buffer_64(rob_v)
  free_aligned_buffer_64(roc_y)
  free_aligned_buffer_64(roc_u)
  free_aligned_buffer_64(roc_v)

  EXPECT_EQ(0, y_err + uv_err);
}

TEST_F(libyuvTest, NV12ToI420RotateNegHeight180) {
  int y_err = 0, uv_err = 0;

  int yw = benchmark_width_;
  int yh = benchmark_height_;
  int b = 128;
  int uvw = (yw + 1) / 2;
  int uvh = (yh + 1) / 2;
  int i, j;

  int y_plane_size = (yw + b * 2) * (yh + b * 2);
  int uv_plane_size = (uvw + b * 2) * (uvh + b * 2);
  int nv_uv_plane_size = (uvw * 2 + b * 2) * (uvh + b * 2);

  srandom(time(NULL));

  align_buffer_64(orig_y, y_plane_size)
  align_buffer_64(orig_uv, nv_uv_plane_size)
  align_buffer_64(roa_y, y_plane_size)
  align_buffer_64(roa_u, uv_plane_size)
  align_buffer_64(roa_v, uv_plane_size)
  align_buffer_64(rob_y, y_plane_size)
  align_buffer_64(rob_u, uv_plane_size)
  align_buffer_64(rob_v, uv_plane_size)
  memset(orig_y, 0, y_plane_size);
  memset(orig_uv, 0, nv_uv_plane_size);
  memset(roa_y, 0, y_plane_size);
  memset(roa_u, 0, uv_plane_size);
  memset(roa_v, 0, uv_plane_size);
  memset(rob_y, 0, y_plane_size);
  memset(rob_u, 0, uv_plane_size);
  memset(rob_v, 0, uv_plane_size);

  // fill image buffers with random data
  for (i = b; i < (yh + b); ++i) {
    for (j = b; j < (yw + b); ++j) {
      orig_y[i * (yw + b * 2) + j] = random() & 0xff;
    }
  }

  for (i = b; i < (uvh + b); ++i) {
    for (j = b; j < (uvw * 2 + b); j += 2) {
      uint8 random_number = random() & 0x7f;
      orig_uv[i * (uvw * 2 + b * 2) + j] = random_number;
      orig_uv[i * (uvw * 2 + b * 2) + j + 1] = -random_number;
    }
  }

  int y_off = b * (yw + b * 2) + b;
  int uv_off = b * (uvw + b * 2) + b;

  int y_st = yw + b * 2;
  int uv_st = uvw + b * 2;

  NV12ToI420Rotate(orig_y + y_off, y_st,
                   orig_uv + y_off, y_st,
                   roa_y + y_off, y_st,
                   roa_u + uv_off, uv_st,
                   roa_v + uv_off, uv_st,
                   yw, -yh,
                   kRotate180);

  I420Rotate(roa_y + y_off, y_st,
             roa_u + uv_off, uv_st,
             roa_v + uv_off, uv_st,
             rob_y + y_off, y_st,
             rob_u + uv_off, uv_st,
             rob_v + uv_off, uv_st,
             yw, -yh,
             kRotate180);

  for (i = 0; i < y_plane_size; ++i) {
    if (orig_y[i] != rob_y[i])
      ++y_err;
  }

  if (y_err) {
    printf("input %dx%d \n", yw, yh);
    PrintArray(orig_y, y_st, yh + b * 2);

    printf("rotate a\n");
    PrintArray(roa_y, y_st, yh + b * 2);

    printf("rotate b\n");
    PrintArray(rob_y, y_st, yh + b * 2);
  }

  int zero_cnt = 0;

  for (i = 0; i < uv_plane_size; ++i) {
    if ((signed char)rob_u[i] != -(signed char)rob_v[i]) {
      ++uv_err;
    }
    if (rob_u[i] != 0) {
      ++zero_cnt;
    }
  }

  if (!zero_cnt) {
    ++uv_err;
  }

  if (uv_err) {
    printf("input %dx%d \n", uvw * 2, uvh);
    PrintArray(orig_uv, y_st, uvh + b * 2);

    printf("rotate a\n");
    PrintArray(roa_u, uv_st, uvh + b * 2);
    PrintArray(roa_v, uv_st, uvh + b * 2);

    printf("rotate b\n");
    PrintArray(rob_u, uv_st, uvh + b * 2);
    PrintArray(rob_v, uv_st, uvh + b * 2);
  }

  free_aligned_buffer_64(orig_y)
  free_aligned_buffer_64(orig_uv)
  free_aligned_buffer_64(roa_y)
  free_aligned_buffer_64(roa_u)
  free_aligned_buffer_64(roa_v)
  free_aligned_buffer_64(rob_y)
  free_aligned_buffer_64(rob_u)
  free_aligned_buffer_64(rob_v)

  EXPECT_EQ(0, y_err + uv_err);
}

TEST_F(libyuvTest, NV12ToI420SplitUV) {
  int err = 0;
  int yw = benchmark_width_;
  int yh = benchmark_height_;

  int b = 128;
  int uvw = (yw + 1) / 2;
  int uvh = (yh + 1) / 2;
  int i, j;

  int y_plane_size = (yw + b * 2) * (yh + b * 2);
  int uv_plane_size = (uvw + b * 2) * (uvh + b * 2);
  int nv_uv_plane_size = (uvw * 2 + b * 2) * (uvh + b * 2);

  align_buffer_64(src_y, y_plane_size)
  align_buffer_64(src_uv, nv_uv_plane_size)
  align_buffer_64(dst_y_c, y_plane_size)
  align_buffer_64(dst_u_c, uv_plane_size)
  align_buffer_64(dst_v_c, uv_plane_size)
  align_buffer_64(dst_y_opt, y_plane_size)
  align_buffer_64(dst_u_opt, uv_plane_size)
  align_buffer_64(dst_v_opt, uv_plane_size)

  memset(src_y, 0, y_plane_size);
  memset(src_uv, 0, nv_uv_plane_size);
  memset(dst_y_c, 0, y_plane_size);
  memset(dst_u_c, 0, uv_plane_size);
  memset(dst_v_c, 0, uv_plane_size);
  memset(dst_y_opt, 0, y_plane_size);
  memset(dst_u_opt, 0, uv_plane_size);
  memset(dst_v_opt, 0, uv_plane_size);

  // fill image buffers with random data
  for (i = b; i < (yh + b); ++i) {
    for (j = b; j < (yw + b); ++j) {
      src_y[i * (yw + b * 2) + j] = j;
    }
  }

  for (i = b; i < (uvh + b); ++i) {
    for (j = b; j < (uvw * 2 + b); j += 2) {
      uint8 num = j & 0x7f;
      src_uv[i * (uvw * 2 + b * 2) + j] = num;
      src_uv[i * (uvw * 2 + b * 2) + j + 1] = num;
    }
  }

  // TODO(fbarchard): Add b to pointers and use stride.
  MaskCpuFlags(0);  // Disable all CPU optimization.
  double c_time = get_time();
  NV12ToI420Rotate(src_y, yw,
                   src_uv, uvw * 2,
                   dst_y_c, yw,
                   dst_u_c, uvw,
                   dst_v_c, uvw,
                   yw, yh,
                   kRotate0);
  c_time = (get_time() - c_time);

  MaskCpuFlags(-1);  // Enable all CPU optimization.
  double opt_time = get_time();
  NV12ToI420Rotate(src_y, yw,
                   src_uv, uvw * 2,
                   dst_y_opt, yw,
                   dst_u_opt, uvw,
                   dst_v_opt, uvw,
                   yw, yh,
                   kRotate0);
  opt_time = (get_time() - opt_time);

  // Report performance of C vs OPT.
  printf("SplitUV %8d us C - %8d us OPT\n",
         static_cast<int>(c_time * 1e6), static_cast<int>(opt_time * 1e6));

  for (i = 0; i < uv_plane_size; ++i) {
    if ((dst_u_c[i] != dst_u_opt[i]) || (dst_v_c[i] != dst_v_opt[i])) {
      printf("%d. dst_u_c = 0x%x, dst_u_opt = 0x%x dst_v_c = 0x%x, "
             "dst_v_opt = 0x%x\n", i,
             dst_u_c[i], dst_u_opt[i], dst_v_c[i], dst_v_opt[i]);
      ++err;
    }
  }
  free_aligned_buffer_64(src_y)
  free_aligned_buffer_64(src_uv)
  free_aligned_buffer_64(dst_y_c)
  free_aligned_buffer_64(dst_u_c)
  free_aligned_buffer_64(dst_v_c)
  free_aligned_buffer_64(dst_y_opt)
  free_aligned_buffer_64(dst_u_opt)
  free_aligned_buffer_64(dst_v_opt)

  EXPECT_EQ(0, err);
}

}  // namespace libyuv