libvpx/test/pp_filter_test.cc - platform/external/libvpx - Git at Google

 /*
  *  Copyright (c) 2012 The WebM 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 <limits.h>
 #include "./vpx_config.h"
 #include "./vpx_dsp_rtcd.h"
 #include "test/acm_random.h"
 #include "test/buffer.h"
 #include "test/clear_system_state.h"
 #include "test/register_state_check.h"
 #include "third_party/googletest/src/include/gtest/gtest.h"
 #include "vpx/vpx_integer.h"
 #include "vpx_mem/vpx_mem.h"

 using libvpx_test::ACMRandom;
 using libvpx_test::Buffer;

 typedef void (*VpxPostProcDownAndAcrossMbRowFunc)(
     unsigned char *src_ptr, unsigned char *dst_ptr, int src_pixels_per_line,
     int dst_pixels_per_line, int cols, unsigned char *flimit, int size);

 typedef void (*VpxMbPostProcAcrossIpFunc)(unsigned char *src, int pitch,
                                           int rows, int cols, int flimit);

 typedef void (*VpxMbPostProcDownFunc)(unsigned char *dst, int pitch, int rows,
                                       int cols, int flimit);

 namespace {

 // Compute the filter level used in post proc from the loop filter strength
 int q2mbl(int x) {
   if (x < 20) x = 20;

   x = 50 + (x - 50) * 10 / 8;
   return x * x / 3;
 }

 class VpxPostProcDownAndAcrossMbRowTest
     : public ::testing::TestWithParam<VpxPostProcDownAndAcrossMbRowFunc> {
  public:
   virtual void TearDown() { libvpx_test::ClearSystemState(); }
 };

 // Test routine for the VPx post-processing function
 // vpx_post_proc_down_and_across_mb_row_c.

 TEST_P(VpxPostProcDownAndAcrossMbRowTest, CheckFilterOutput) {
   // Size of the underlying data block that will be filtered.
   const int block_width = 16;
   const int block_height = 16;

   // 5-tap filter needs 2 padding rows above and below the block in the input.
   Buffer<uint8_t> src_image = Buffer<uint8_t>(block_width, block_height, 2);

   // Filter extends output block by 8 samples at left and right edges.
   // Though the left padding is only 8 bytes, the assembly code tries to
   // read 16 bytes before the pointer.
   Buffer<uint8_t> dst_image =
       Buffer<uint8_t>(block_width, block_height, 8, 16, 8, 8);

   uint8_t *const flimits =
       reinterpret_cast<uint8_t *>(vpx_memalign(16, block_width));
   (void)memset(flimits, 255, block_width);

   // Initialize pixels in the input:
   //   block pixels to value 1,
   //   border pixels to value 10.
   src_image.SetPadding(10);
   src_image.Set(1);

   // Initialize pixels in the output to 99.
   dst_image.Set(99);

   ASM_REGISTER_STATE_CHECK(GetParam()(
       src_image.TopLeftPixel(), dst_image.TopLeftPixel(), src_image.stride(),
       dst_image.stride(), block_width, flimits, 16));

   static const uint8_t kExpectedOutput[block_height] = {
     4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 4
   };

   uint8_t *pixel_ptr = dst_image.TopLeftPixel();
   for (int i = 0; i < block_height; ++i) {
     for (int j = 0; j < block_width; ++j) {
       ASSERT_EQ(kExpectedOutput[i], pixel_ptr[j]) << "at (" << i << ", " << j
                                                   << ")";
     }
     pixel_ptr += dst_image.stride();
   }

   vpx_free(flimits);
 };

 TEST_P(VpxPostProcDownAndAcrossMbRowTest, CheckCvsAssembly) {
   // Size of the underlying data block that will be filtered.
   // Y blocks are always a multiple of 16 wide and exactly 16 high. U and V
   // blocks are always a multiple of 8 wide and exactly 8 high.
   const int block_width = 136;
   const int block_height = 16;

   // 5-tap filter needs 2 padding rows above and below the block in the input.
   // SSE2 reads in blocks of 16. Pad an extra 8 in case the width is not %16.
   Buffer<uint8_t> src_image =
       Buffer<uint8_t>(block_width, block_height, 2, 2, 10, 2);

   // Filter extends output block by 8 samples at left and right edges.
   // Though the left padding is only 8 bytes, there is 'above' padding as well
   // so when the assembly code tries to read 16 bytes before the pointer it is
   // not a problem.
   // SSE2 reads in blocks of 16. Pad an extra 8 in case the width is not %16.
   Buffer<uint8_t> dst_image =
       Buffer<uint8_t>(block_width, block_height, 8, 8, 16, 8);
   Buffer<uint8_t> dst_image_ref = Buffer<uint8_t>(block_width, block_height, 8);

   // Filter values are set in blocks of 16 for Y and 8 for U/V. Each macroblock
   // can have a different filter. SSE2 assembly reads flimits in blocks of 16 so
   // it must be padded out.
   const int flimits_width = block_width % 16 ? block_width + 8 : block_width;
   uint8_t *const flimits =
       reinterpret_cast<uint8_t *>(vpx_memalign(16, flimits_width));

   ACMRandom rnd;
   rnd.Reset(ACMRandom::DeterministicSeed());
   // Initialize pixels in the input:
   //   block pixels to random values.
   //   border pixels to value 10.
   src_image.SetPadding(10);
   src_image.Set(&rnd, &ACMRandom::Rand8);

   for (int blocks = 0; blocks < block_width; blocks += 8) {
     (void)memset(flimits, 0, sizeof(*flimits) * flimits_width);

     for (int f = 0; f < 255; f++) {
       (void)memset(flimits + blocks, f, sizeof(*flimits) * 8);

       dst_image.Set(0);
       dst_image_ref.Set(0);

       vpx_post_proc_down_and_across_mb_row_c(
           src_image.TopLeftPixel(), dst_image_ref.TopLeftPixel(),
           src_image.stride(), dst_image_ref.stride(), block_width, flimits,
           block_height);
       ASM_REGISTER_STATE_CHECK(
           GetParam()(src_image.TopLeftPixel(), dst_image.TopLeftPixel(),
                      src_image.stride(), dst_image.stride(), block_width,
                      flimits, block_height));

       ASSERT_TRUE(dst_image.CheckValues(dst_image_ref));
     }
   }

   vpx_free(flimits);
 }

 class VpxMbPostProcAcrossIpTest
     : public ::testing::TestWithParam<VpxMbPostProcAcrossIpFunc> {
  public:
   virtual void TearDown() { libvpx_test::ClearSystemState(); }

  protected:
   void SetCols(unsigned char *s, int rows, int cols, int src_width) {
     for (int r = 0; r < rows; r++) {
       for (int c = 0; c < cols; c++) {
         s[c] = c;
       }
       s += src_width;
     }
   }

   void RunComparison(const unsigned char *expected_output, unsigned char *src_c,
                      int rows, int cols, int src_pitch) {
     for (int r = 0; r < rows; r++) {
       for (int c = 0; c < cols; c++) {
         ASSERT_EQ(expected_output[c], src_c[c]) << "at (" << r << ", " << c
                                                 << ")";
       }
       src_c += src_pitch;
     }
   }

   void RunFilterLevel(unsigned char *s, int rows, int cols, int src_width,
                       int filter_level, const unsigned char *expected_output) {
     ASM_REGISTER_STATE_CHECK(
         GetParam()(s, src_width, rows, cols, filter_level));
     RunComparison(expected_output, s, rows, cols, src_width);
   }
 };

 TEST_P(VpxMbPostProcAcrossIpTest, CheckLowFilterOutput) {
   const int rows = 16;
   const int cols = 16;

   Buffer<uint8_t> src = Buffer<uint8_t>(cols, rows, 8, 8, 17, 8);
   src.SetPadding(10);
   SetCols(src.TopLeftPixel(), rows, cols, src.stride());

   Buffer<uint8_t> expected_output = Buffer<uint8_t>(cols, rows, 0);
   SetCols(expected_output.TopLeftPixel(), rows, cols, expected_output.stride());

   RunFilterLevel(src.TopLeftPixel(), rows, cols, src.stride(), q2mbl(0),
                  expected_output.TopLeftPixel());
 }

 TEST_P(VpxMbPostProcAcrossIpTest, CheckMediumFilterOutput) {
   const int rows = 16;
   const int cols = 16;

   Buffer<uint8_t> src = Buffer<uint8_t>(cols, rows, 8, 8, 17, 8);
   src.SetPadding(10);
   SetCols(src.TopLeftPixel(), rows, cols, src.stride());

   static const unsigned char kExpectedOutput[cols] = {
     2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 13
   };

   RunFilterLevel(src.TopLeftPixel(), rows, cols, src.stride(), q2mbl(70),
                  kExpectedOutput);
 }

 TEST_P(VpxMbPostProcAcrossIpTest, CheckHighFilterOutput) {
   const int rows = 16;
   const int cols = 16;

   Buffer<uint8_t> src = Buffer<uint8_t>(cols, rows, 8, 8, 17, 8);
   src.SetPadding(10);
   SetCols(src.TopLeftPixel(), rows, cols, src.stride());

   static const unsigned char kExpectedOutput[cols] = {
     2, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 11, 12, 13, 13
   };

   RunFilterLevel(src.TopLeftPixel(), rows, cols, src.stride(), INT_MAX,
                  kExpectedOutput);

   SetCols(src.TopLeftPixel(), rows, cols, src.stride());

   RunFilterLevel(src.TopLeftPixel(), rows, cols, src.stride(), q2mbl(100),
                  kExpectedOutput);
 }

 TEST_P(VpxMbPostProcAcrossIpTest, CheckCvsAssembly) {
   const int rows = 16;
   const int cols = 16;

   Buffer<uint8_t> c_mem = Buffer<uint8_t>(cols, rows, 8, 8, 17, 8);
   Buffer<uint8_t> asm_mem = Buffer<uint8_t>(cols, rows, 8, 8, 17, 8);

   // When level >= 100, the filter behaves the same as the level = INT_MAX
   // When level < 20, it behaves the same as the level = 0
   for (int level = 0; level < 100; level++) {
     c_mem.SetPadding(10);
     asm_mem.SetPadding(10);
     SetCols(c_mem.TopLeftPixel(), rows, cols, c_mem.stride());
     SetCols(asm_mem.TopLeftPixel(), rows, cols, asm_mem.stride());

     vpx_mbpost_proc_across_ip_c(c_mem.TopLeftPixel(), c_mem.stride(), rows,
                                 cols, q2mbl(level));
     ASM_REGISTER_STATE_CHECK(GetParam()(
         asm_mem.TopLeftPixel(), asm_mem.stride(), rows, cols, q2mbl(level)));

     ASSERT_TRUE(asm_mem.CheckValues(c_mem));
   }
 }

 class VpxMbPostProcDownTest
     : public ::testing::TestWithParam<VpxMbPostProcDownFunc> {
  public:
   virtual void TearDown() { libvpx_test::ClearSystemState(); }

  protected:
   void SetRows(unsigned char *src_c, int rows, int cols, int src_width) {
     for (int r = 0; r < rows; r++) {
       memset(src_c, r, cols);
       src_c += src_width;
     }
   }

   void RunComparison(const unsigned char *expected_output, unsigned char *src_c,
                      int rows, int cols, int src_pitch) {
     for (int r = 0; r < rows; r++) {
       for (int c = 0; c < cols; c++) {
         ASSERT_EQ(expected_output[r * rows + c], src_c[c]) << "at (" << r
                                                            << ", " << c << ")";
       }
       src_c += src_pitch;
     }
   }

   void RunFilterLevel(unsigned char *s, int rows, int cols, int src_width,
                       int filter_level, const unsigned char *expected_output) {
     ASM_REGISTER_STATE_CHECK(
         GetParam()(s, src_width, rows, cols, filter_level));
     RunComparison(expected_output, s, rows, cols, src_width);
   }
 };

 TEST_P(VpxMbPostProcDownTest, CheckHighFilterOutput) {
   const int rows = 16;
   const int cols = 16;

   Buffer<uint8_t> src_c = Buffer<uint8_t>(cols, rows, 8, 8, 8, 17);
   src_c.SetPadding(10);

   SetRows(src_c.TopLeftPixel(), rows, cols, src_c.stride());

   static const unsigned char kExpectedOutput[rows * cols] = {
     2,  2,  1,  1,  2,  2,  2,  2,  2,  2,  1,  1,  2,  2,  2,  2,  2,  2,  2,
     2,  3,  2,  2,  2,  2,  2,  2,  2,  3,  2,  2,  2,  3,  3,  3,  3,  3,  3,
     3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  4,  4,  3,  4,  4,  3,  3,  3,
     4,  4,  3,  4,  4,  3,  3,  4,  5,  4,  4,  4,  4,  4,  4,  4,  5,  4,  4,
     4,  4,  4,  4,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,
     5,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  7,  7,
     7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  8,  8,  8,  8,  8,
     8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  9,  8,  9,  9,  8,  8,  8,  9,
     9,  8,  9,  9,  8,  8,  8,  9,  9,  10, 10, 9,  9,  9,  10, 10, 9,  10, 10,
     9,  9,  9,  10, 10, 10, 11, 10, 10, 10, 11, 10, 11, 10, 11, 10, 10, 10, 11,
     10, 11, 11, 11, 11, 11, 11, 11, 12, 11, 11, 11, 11, 11, 11, 11, 12, 11, 12,
     12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 12,
     13, 12, 13, 12, 12, 12, 13, 12, 13, 12, 13, 12, 13, 13, 13, 14, 13, 13, 13,
     13, 13, 13, 13, 14, 13, 13, 13, 13
   };

   RunFilterLevel(src_c.TopLeftPixel(), rows, cols, src_c.stride(), INT_MAX,
                  kExpectedOutput);

   src_c.SetPadding(10);
   SetRows(src_c.TopLeftPixel(), rows, cols, src_c.stride());
   RunFilterLevel(src_c.TopLeftPixel(), rows, cols, src_c.stride(), q2mbl(100),
                  kExpectedOutput);
 }

 TEST_P(VpxMbPostProcDownTest, CheckMediumFilterOutput) {
   const int rows = 16;
   const int cols = 16;

   Buffer<uint8_t> src_c = Buffer<uint8_t>(cols, rows, 8, 8, 8, 17);
   src_c.SetPadding(10);

   SetRows(src_c.TopLeftPixel(), rows, cols, src_c.stride());

   static const unsigned char kExpectedOutput[rows * cols] = {
     2,  2,  1,  1,  2,  2,  2,  2,  2,  2,  1,  1,  2,  2,  2,  2,  2,  2,  2,
     2,  3,  2,  2,  2,  2,  2,  2,  2,  3,  2,  2,  2,  2,  2,  2,  2,  2,  2,
     2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  3,  3,  3,  3,  3,  3,  3,  3,  3,
     3,  3,  3,  3,  3,  3,  3,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,
     4,  4,  4,  4,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,
     5,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  7,  7,
     7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  8,  8,  8,  8,  8,
     8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  9,  9,  9,  9,  9,  9,  9,  9,
     9,  9,  9,  9,  9,  9,  9,  9,  10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
     10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
     11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13,
     13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 13, 12,
     13, 12, 13, 12, 12, 12, 13, 12, 13, 12, 13, 12, 13, 13, 13, 14, 13, 13, 13,
     13, 13, 13, 13, 14, 13, 13, 13, 13
   };

   RunFilterLevel(src_c.TopLeftPixel(), rows, cols, src_c.stride(), q2mbl(70),
                  kExpectedOutput);
 }

 TEST_P(VpxMbPostProcDownTest, CheckLowFilterOutput) {
   const int rows = 16;
   const int cols = 16;

   Buffer<uint8_t> src_c = Buffer<uint8_t>(cols, rows, 8, 8, 8, 17);
   src_c.SetPadding(10);

   SetRows(src_c.TopLeftPixel(), rows, cols, src_c.stride());

   unsigned char *expected_output = new unsigned char[rows * cols];
   ASSERT_TRUE(expected_output != NULL);
   SetRows(expected_output, rows, cols, cols);

   RunFilterLevel(src_c.TopLeftPixel(), rows, cols, src_c.stride(), q2mbl(0),
                  expected_output);

   delete[] expected_output;
 }

 TEST_P(VpxMbPostProcDownTest, CheckCvsAssembly) {
   const int rows = 16;
   const int cols = 16;

   ACMRandom rnd;
   rnd.Reset(ACMRandom::DeterministicSeed());

   Buffer<uint8_t> src_c = Buffer<uint8_t>(cols, rows, 8, 8, 8, 17);
   Buffer<uint8_t> src_asm = Buffer<uint8_t>(cols, rows, 8, 8, 8, 17);

   for (int level = 0; level < 100; level++) {
     src_c.SetPadding(10);
     src_asm.SetPadding(10);
     src_c.Set(&rnd, &ACMRandom::Rand8);
     src_asm.CopyFrom(src_c);

     vpx_mbpost_proc_down_c(src_c.TopLeftPixel(), src_c.stride(), rows, cols,
                            q2mbl(level));
     ASM_REGISTER_STATE_CHECK(GetParam()(
         src_asm.TopLeftPixel(), src_asm.stride(), rows, cols, q2mbl(level)));
     ASSERT_TRUE(src_asm.CheckValues(src_c));

     src_c.SetPadding(10);
     src_asm.SetPadding(10);
     src_c.Set(&rnd, &ACMRandom::Rand8Extremes);
     src_asm.CopyFrom(src_c);

     vpx_mbpost_proc_down_c(src_c.TopLeftPixel(), src_c.stride(), rows, cols,
                            q2mbl(level));
     ASM_REGISTER_STATE_CHECK(GetParam()(
         src_asm.TopLeftPixel(), src_asm.stride(), rows, cols, q2mbl(level)));
     ASSERT_TRUE(src_asm.CheckValues(src_c));
   }
 }

 INSTANTIATE_TEST_CASE_P(
     C, VpxPostProcDownAndAcrossMbRowTest,
     ::testing::Values(vpx_post_proc_down_and_across_mb_row_c));

 INSTANTIATE_TEST_CASE_P(C, VpxMbPostProcAcrossIpTest,
                         ::testing::Values(vpx_mbpost_proc_across_ip_c));

 INSTANTIATE_TEST_CASE_P(C, VpxMbPostProcDownTest,
                         ::testing::Values(vpx_mbpost_proc_down_c));

 #if HAVE_SSE2
 INSTANTIATE_TEST_CASE_P(
     SSE2, VpxPostProcDownAndAcrossMbRowTest,
     ::testing::Values(vpx_post_proc_down_and_across_mb_row_sse2));

 INSTANTIATE_TEST_CASE_P(SSE2, VpxMbPostProcAcrossIpTest,
                         ::testing::Values(vpx_mbpost_proc_across_ip_sse2));

 INSTANTIATE_TEST_CASE_P(SSE2, VpxMbPostProcDownTest,
                         ::testing::Values(vpx_mbpost_proc_down_sse2));
 #endif  // HAVE_SSE2

 #if HAVE_NEON
 INSTANTIATE_TEST_CASE_P(
     NEON, VpxPostProcDownAndAcrossMbRowTest,
     ::testing::Values(vpx_post_proc_down_and_across_mb_row_neon));

 INSTANTIATE_TEST_CASE_P(NEON, VpxMbPostProcAcrossIpTest,
                         ::testing::Values(vpx_mbpost_proc_across_ip_neon));

 INSTANTIATE_TEST_CASE_P(NEON, VpxMbPostProcDownTest,
                         ::testing::Values(vpx_mbpost_proc_down_neon));
 #endif  // HAVE_NEON

 #if HAVE_MSA
 INSTANTIATE_TEST_CASE_P(
     MSA, VpxPostProcDownAndAcrossMbRowTest,
     ::testing::Values(vpx_post_proc_down_and_across_mb_row_msa));

 INSTANTIATE_TEST_CASE_P(MSA, VpxMbPostProcAcrossIpTest,
                         ::testing::Values(vpx_mbpost_proc_across_ip_msa));

 INSTANTIATE_TEST_CASE_P(MSA, VpxMbPostProcDownTest,
                         ::testing::Values(vpx_mbpost_proc_down_msa));
 #endif  // HAVE_MSA

 }  // namespace
	/*
	* Copyright (c) 2012 The WebM 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 <limits.h>
	#include "./vpx_config.h"
	#include "./vpx_dsp_rtcd.h"
	#include "test/acm_random.h"
	#include "test/buffer.h"
	#include "test/clear_system_state.h"
	#include "test/register_state_check.h"
	#include "third_party/googletest/src/include/gtest/gtest.h"
	#include "vpx/vpx_integer.h"
	#include "vpx_mem/vpx_mem.h"

	using libvpx_test::ACMRandom;
	using libvpx_test::Buffer;

	typedef void (*VpxPostProcDownAndAcrossMbRowFunc)(
	unsigned char src_ptr, unsigned char dst_ptr, int src_pixels_per_line,
	int dst_pixels_per_line, int cols, unsigned char *flimit, int size);

	typedef void (VpxMbPostProcAcrossIpFunc)(unsigned char src, int pitch,
	int rows, int cols, int flimit);

	typedef void (VpxMbPostProcDownFunc)(unsigned char dst, int pitch, int rows,
	int cols, int flimit);

	namespace {

	// Compute the filter level used in post proc from the loop filter strength
	int q2mbl(int x) {
	if (x < 20) x = 20;

	x = 50 + (x - 50) * 10 / 8;
	return x * x / 3;
	}

	class VpxPostProcDownAndAcrossMbRowTest
	: public ::testing::TestWithParam<VpxPostProcDownAndAcrossMbRowFunc> {
	public:
	virtual void TearDown() { libvpx_test::ClearSystemState(); }
	};

	// Test routine for the VPx post-processing function
	// vpx_post_proc_down_and_across_mb_row_c.

	TEST_P(VpxPostProcDownAndAcrossMbRowTest, CheckFilterOutput) {
	// Size of the underlying data block that will be filtered.
	const int block_width = 16;
	const int block_height = 16;

	// 5-tap filter needs 2 padding rows above and below the block in the input.
	Buffer<uint8_t> src_image = Buffer<uint8_t>(block_width, block_height, 2);

	// Filter extends output block by 8 samples at left and right edges.
	// Though the left padding is only 8 bytes, the assembly code tries to
	// read 16 bytes before the pointer.
	Buffer<uint8_t> dst_image =
	Buffer<uint8_t>(block_width, block_height, 8, 16, 8, 8);

	uint8_t *const flimits =
	reinterpret_cast<uint8_t *>(vpx_memalign(16, block_width));
	(void)memset(flimits, 255, block_width);

	// Initialize pixels in the input:
	// block pixels to value 1,
	// border pixels to value 10.
	src_image.SetPadding(10);
	src_image.Set(1);

	// Initialize pixels in the output to 99.
	dst_image.Set(99);

	ASM_REGISTER_STATE_CHECK(GetParam()(
	src_image.TopLeftPixel(), dst_image.TopLeftPixel(), src_image.stride(),
	dst_image.stride(), block_width, flimits, 16));

	static const uint8_t kExpectedOutput[block_height] = {
	4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 4
	};

	uint8_t *pixel_ptr = dst_image.TopLeftPixel();
	for (int i = 0; i < block_height; ++i) {
	for (int j = 0; j < block_width; ++j) {
	ASSERT_EQ(kExpectedOutput[i], pixel_ptr[j]) << "at (" << i << ", " << j
	<< ")";
	}
	pixel_ptr += dst_image.stride();
	}

	vpx_free(flimits);
	};

	TEST_P(VpxPostProcDownAndAcrossMbRowTest, CheckCvsAssembly) {
	// Size of the underlying data block that will be filtered.
	// Y blocks are always a multiple of 16 wide and exactly 16 high. U and V
	// blocks are always a multiple of 8 wide and exactly 8 high.
	const int block_width = 136;
	const int block_height = 16;

	// 5-tap filter needs 2 padding rows above and below the block in the input.
	// SSE2 reads in blocks of 16. Pad an extra 8 in case the width is not %16.
	Buffer<uint8_t> src_image =
	Buffer<uint8_t>(block_width, block_height, 2, 2, 10, 2);

	// Filter extends output block by 8 samples at left and right edges.
	// Though the left padding is only 8 bytes, there is 'above' padding as well
	// so when the assembly code tries to read 16 bytes before the pointer it is
	// not a problem.
	// SSE2 reads in blocks of 16. Pad an extra 8 in case the width is not %16.
	Buffer<uint8_t> dst_image =
	Buffer<uint8_t>(block_width, block_height, 8, 8, 16, 8);
	Buffer<uint8_t> dst_image_ref = Buffer<uint8_t>(block_width, block_height, 8);

	// Filter values are set in blocks of 16 for Y and 8 for U/V. Each macroblock
	// can have a different filter. SSE2 assembly reads flimits in blocks of 16 so
	// it must be padded out.
	const int flimits_width = block_width % 16 ? block_width + 8 : block_width;
	uint8_t *const flimits =
	reinterpret_cast<uint8_t *>(vpx_memalign(16, flimits_width));

	ACMRandom rnd;
	rnd.Reset(ACMRandom::DeterministicSeed());
	// Initialize pixels in the input:
	// block pixels to random values.
	// border pixels to value 10.
	src_image.SetPadding(10);
	src_image.Set(&rnd, &ACMRandom::Rand8);

	for (int blocks = 0; blocks < block_width; blocks += 8) {
	(void)memset(flimits, 0, sizeof(flimits) flimits_width);

	for (int f = 0; f < 255; f++) {
	(void)memset(flimits + blocks, f, sizeof(flimits) 8);

	dst_image.Set(0);
	dst_image_ref.Set(0);

	vpx_post_proc_down_and_across_mb_row_c(
	src_image.TopLeftPixel(), dst_image_ref.TopLeftPixel(),
	src_image.stride(), dst_image_ref.stride(), block_width, flimits,
	block_height);
	ASM_REGISTER_STATE_CHECK(
	GetParam()(src_image.TopLeftPixel(), dst_image.TopLeftPixel(),
	src_image.stride(), dst_image.stride(), block_width,
	flimits, block_height));

	ASSERT_TRUE(dst_image.CheckValues(dst_image_ref));
	}
	}

	vpx_free(flimits);
	}

	class VpxMbPostProcAcrossIpTest
	: public ::testing::TestWithParam<VpxMbPostProcAcrossIpFunc> {
	public:
	virtual void TearDown() { libvpx_test::ClearSystemState(); }

	protected:
	void SetCols(unsigned char *s, int rows, int cols, int src_width) {
	for (int r = 0; r < rows; r++) {
	for (int c = 0; c < cols; c++) {
	s[c] = c;
	}
	s += src_width;
	}
	}

	void RunComparison(const unsigned char expected_output, unsigned char src_c,
	int rows, int cols, int src_pitch) {
	for (int r = 0; r < rows; r++) {
	for (int c = 0; c < cols; c++) {
	ASSERT_EQ(expected_output[c], src_c[c]) << "at (" << r << ", " << c
	<< ")";
	}
	src_c += src_pitch;
	}
	}

	void RunFilterLevel(unsigned char *s, int rows, int cols, int src_width,
	int filter_level, const unsigned char *expected_output) {
	ASM_REGISTER_STATE_CHECK(
	GetParam()(s, src_width, rows, cols, filter_level));
	RunComparison(expected_output, s, rows, cols, src_width);
	}
	};

	TEST_P(VpxMbPostProcAcrossIpTest, CheckLowFilterOutput) {
	const int rows = 16;
	const int cols = 16;

	Buffer<uint8_t> src = Buffer<uint8_t>(cols, rows, 8, 8, 17, 8);
	src.SetPadding(10);
	SetCols(src.TopLeftPixel(), rows, cols, src.stride());

	Buffer<uint8_t> expected_output = Buffer<uint8_t>(cols, rows, 0);
	SetCols(expected_output.TopLeftPixel(), rows, cols, expected_output.stride());

	RunFilterLevel(src.TopLeftPixel(), rows, cols, src.stride(), q2mbl(0),
	expected_output.TopLeftPixel());
	}

	TEST_P(VpxMbPostProcAcrossIpTest, CheckMediumFilterOutput) {
	const int rows = 16;
	const int cols = 16;

	Buffer<uint8_t> src = Buffer<uint8_t>(cols, rows, 8, 8, 17, 8);
	src.SetPadding(10);
	SetCols(src.TopLeftPixel(), rows, cols, src.stride());

	static const unsigned char kExpectedOutput[cols] = {
	2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 13
	};

	RunFilterLevel(src.TopLeftPixel(), rows, cols, src.stride(), q2mbl(70),
	kExpectedOutput);
	}

	TEST_P(VpxMbPostProcAcrossIpTest, CheckHighFilterOutput) {
	const int rows = 16;
	const int cols = 16;

	Buffer<uint8_t> src = Buffer<uint8_t>(cols, rows, 8, 8, 17, 8);
	src.SetPadding(10);
	SetCols(src.TopLeftPixel(), rows, cols, src.stride());

	static const unsigned char kExpectedOutput[cols] = {
	2, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 11, 12, 13, 13
	};

	RunFilterLevel(src.TopLeftPixel(), rows, cols, src.stride(), INT_MAX,
	kExpectedOutput);

	SetCols(src.TopLeftPixel(), rows, cols, src.stride());

	RunFilterLevel(src.TopLeftPixel(), rows, cols, src.stride(), q2mbl(100),
	kExpectedOutput);
	}

	TEST_P(VpxMbPostProcAcrossIpTest, CheckCvsAssembly) {
	const int rows = 16;
	const int cols = 16;

	Buffer<uint8_t> c_mem = Buffer<uint8_t>(cols, rows, 8, 8, 17, 8);
	Buffer<uint8_t> asm_mem = Buffer<uint8_t>(cols, rows, 8, 8, 17, 8);

	// When level >= 100, the filter behaves the same as the level = INT_MAX
	// When level < 20, it behaves the same as the level = 0
	for (int level = 0; level < 100; level++) {
	c_mem.SetPadding(10);
	asm_mem.SetPadding(10);
	SetCols(c_mem.TopLeftPixel(), rows, cols, c_mem.stride());
	SetCols(asm_mem.TopLeftPixel(), rows, cols, asm_mem.stride());

	vpx_mbpost_proc_across_ip_c(c_mem.TopLeftPixel(), c_mem.stride(), rows,
	cols, q2mbl(level));
	ASM_REGISTER_STATE_CHECK(GetParam()(
	asm_mem.TopLeftPixel(), asm_mem.stride(), rows, cols, q2mbl(level)));

	ASSERT_TRUE(asm_mem.CheckValues(c_mem));
	}
	}

	class VpxMbPostProcDownTest
	: public ::testing::TestWithParam<VpxMbPostProcDownFunc> {
	public:
	virtual void TearDown() { libvpx_test::ClearSystemState(); }

	protected:
	void SetRows(unsigned char *src_c, int rows, int cols, int src_width) {
	for (int r = 0; r < rows; r++) {
	memset(src_c, r, cols);
	src_c += src_width;
	}
	}

	void RunComparison(const unsigned char expected_output, unsigned char src_c,
	int rows, int cols, int src_pitch) {
	for (int r = 0; r < rows; r++) {
	for (int c = 0; c < cols; c++) {
	ASSERT_EQ(expected_output[r * rows + c], src_c[c]) << "at (" << r
	<< ", " << c << ")";
	}
	src_c += src_pitch;
	}
	}

	void RunFilterLevel(unsigned char *s, int rows, int cols, int src_width,
	int filter_level, const unsigned char *expected_output) {
	ASM_REGISTER_STATE_CHECK(
	GetParam()(s, src_width, rows, cols, filter_level));
	RunComparison(expected_output, s, rows, cols, src_width);
	}
	};

	TEST_P(VpxMbPostProcDownTest, CheckHighFilterOutput) {
	const int rows = 16;
	const int cols = 16;

	Buffer<uint8_t> src_c = Buffer<uint8_t>(cols, rows, 8, 8, 8, 17);
	src_c.SetPadding(10);

	SetRows(src_c.TopLeftPixel(), rows, cols, src_c.stride());

	static const unsigned char kExpectedOutput[rows * cols] = {
	2, 2, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 2, 2, 2, 2, 2, 2, 2,
	2, 3, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 3, 3, 3, 3, 3, 3,
	3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 3, 4, 4, 3, 3, 3,
	4, 4, 3, 4, 4, 3, 3, 4, 5, 4, 4, 4, 4, 4, 4, 4, 5, 4, 4,
	4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
	5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7,
	7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8,
	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 8, 9, 9, 8, 8, 8, 9,
	9, 8, 9, 9, 8, 8, 8, 9, 9, 10, 10, 9, 9, 9, 10, 10, 9, 10, 10,
	9, 9, 9, 10, 10, 10, 11, 10, 10, 10, 11, 10, 11, 10, 11, 10, 10, 10, 11,
	10, 11, 11, 11, 11, 11, 11, 11, 12, 11, 11, 11, 11, 11, 11, 11, 12, 11, 12,
	12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 12,
	13, 12, 13, 12, 12, 12, 13, 12, 13, 12, 13, 12, 13, 13, 13, 14, 13, 13, 13,
	13, 13, 13, 13, 14, 13, 13, 13, 13
	};

	RunFilterLevel(src_c.TopLeftPixel(), rows, cols, src_c.stride(), INT_MAX,
	kExpectedOutput);

	src_c.SetPadding(10);
	SetRows(src_c.TopLeftPixel(), rows, cols, src_c.stride());
	RunFilterLevel(src_c.TopLeftPixel(), rows, cols, src_c.stride(), q2mbl(100),
	kExpectedOutput);
	}

	TEST_P(VpxMbPostProcDownTest, CheckMediumFilterOutput) {
	const int rows = 16;
	const int cols = 16;

	Buffer<uint8_t> src_c = Buffer<uint8_t>(cols, rows, 8, 8, 8, 17);
	src_c.SetPadding(10);

	SetRows(src_c.TopLeftPixel(), rows, cols, src_c.stride());

	static const unsigned char kExpectedOutput[rows * cols] = {
	2, 2, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 2, 2, 2, 2, 2, 2, 2,
	2, 3, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2,
	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3,
	3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
	4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
	5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7,
	7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8,
	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9,
	9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
	10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
	11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13,
	13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 13, 12,
	13, 12, 13, 12, 12, 12, 13, 12, 13, 12, 13, 12, 13, 13, 13, 14, 13, 13, 13,
	13, 13, 13, 13, 14, 13, 13, 13, 13
	};

	RunFilterLevel(src_c.TopLeftPixel(), rows, cols, src_c.stride(), q2mbl(70),
	kExpectedOutput);
	}

	TEST_P(VpxMbPostProcDownTest, CheckLowFilterOutput) {
	const int rows = 16;
	const int cols = 16;

	Buffer<uint8_t> src_c = Buffer<uint8_t>(cols, rows, 8, 8, 8, 17);
	src_c.SetPadding(10);

	SetRows(src_c.TopLeftPixel(), rows, cols, src_c.stride());

	unsigned char expected_output = new unsigned char[rows cols];
	ASSERT_TRUE(expected_output != NULL);
	SetRows(expected_output, rows, cols, cols);

	RunFilterLevel(src_c.TopLeftPixel(), rows, cols, src_c.stride(), q2mbl(0),
	expected_output);

	delete[] expected_output;
	}

	TEST_P(VpxMbPostProcDownTest, CheckCvsAssembly) {
	const int rows = 16;
	const int cols = 16;

	ACMRandom rnd;
	rnd.Reset(ACMRandom::DeterministicSeed());

	Buffer<uint8_t> src_c = Buffer<uint8_t>(cols, rows, 8, 8, 8, 17);
	Buffer<uint8_t> src_asm = Buffer<uint8_t>(cols, rows, 8, 8, 8, 17);

	for (int level = 0; level < 100; level++) {
	src_c.SetPadding(10);
	src_asm.SetPadding(10);
	src_c.Set(&rnd, &ACMRandom::Rand8);
	src_asm.CopyFrom(src_c);

	vpx_mbpost_proc_down_c(src_c.TopLeftPixel(), src_c.stride(), rows, cols,
	q2mbl(level));
	ASM_REGISTER_STATE_CHECK(GetParam()(
	src_asm.TopLeftPixel(), src_asm.stride(), rows, cols, q2mbl(level)));
	ASSERT_TRUE(src_asm.CheckValues(src_c));

	src_c.SetPadding(10);
	src_asm.SetPadding(10);
	src_c.Set(&rnd, &ACMRandom::Rand8Extremes);
	src_asm.CopyFrom(src_c);

	vpx_mbpost_proc_down_c(src_c.TopLeftPixel(), src_c.stride(), rows, cols,
	q2mbl(level));
	ASM_REGISTER_STATE_CHECK(GetParam()(
	src_asm.TopLeftPixel(), src_asm.stride(), rows, cols, q2mbl(level)));
	ASSERT_TRUE(src_asm.CheckValues(src_c));
	}
	}

	INSTANTIATE_TEST_CASE_P(
	C, VpxPostProcDownAndAcrossMbRowTest,
	::testing::Values(vpx_post_proc_down_and_across_mb_row_c));

	INSTANTIATE_TEST_CASE_P(C, VpxMbPostProcAcrossIpTest,
	::testing::Values(vpx_mbpost_proc_across_ip_c));

	INSTANTIATE_TEST_CASE_P(C, VpxMbPostProcDownTest,
	::testing::Values(vpx_mbpost_proc_down_c));

	#if HAVE_SSE2
	INSTANTIATE_TEST_CASE_P(
	SSE2, VpxPostProcDownAndAcrossMbRowTest,
	::testing::Values(vpx_post_proc_down_and_across_mb_row_sse2));

	INSTANTIATE_TEST_CASE_P(SSE2, VpxMbPostProcAcrossIpTest,
	::testing::Values(vpx_mbpost_proc_across_ip_sse2));

	INSTANTIATE_TEST_CASE_P(SSE2, VpxMbPostProcDownTest,
	::testing::Values(vpx_mbpost_proc_down_sse2));
	#endif // HAVE_SSE2

	#if HAVE_NEON
	INSTANTIATE_TEST_CASE_P(
	NEON, VpxPostProcDownAndAcrossMbRowTest,
	::testing::Values(vpx_post_proc_down_and_across_mb_row_neon));

	INSTANTIATE_TEST_CASE_P(NEON, VpxMbPostProcAcrossIpTest,
	::testing::Values(vpx_mbpost_proc_across_ip_neon));

	INSTANTIATE_TEST_CASE_P(NEON, VpxMbPostProcDownTest,
	::testing::Values(vpx_mbpost_proc_down_neon));
	#endif // HAVE_NEON

	#if HAVE_MSA
	INSTANTIATE_TEST_CASE_P(
	MSA, VpxPostProcDownAndAcrossMbRowTest,
	::testing::Values(vpx_post_proc_down_and_across_mb_row_msa));

	INSTANTIATE_TEST_CASE_P(MSA, VpxMbPostProcAcrossIpTest,
	::testing::Values(vpx_mbpost_proc_across_ip_msa));

	INSTANTIATE_TEST_CASE_P(MSA, VpxMbPostProcDownTest,
	::testing::Values(vpx_mbpost_proc_down_msa));
	#endif // HAVE_MSA

	} // namespace