Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

1 files changed, 876 insertions, 0 deletions

diff --git a/third_party/aom/test/dct16x16_test.cc b/third_party/aom/test/dct16x16_test.cc
new file mode 100644
index 000000000..89263ce89
--- /dev/null
+++ b/third_party/aom/test/dct16x16_test.cc
@@ -0,0 +1,876 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+*/
+
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
+
+#include "./av1_rtcd.h"
+#include "./aom_dsp_rtcd.h"
+#include "test/acm_random.h"
+#include "test/clear_system_state.h"
+#include "test/register_state_check.h"
+#include "test/util.h"
+#include "av1/common/entropy.h"
+#include "av1/common/scan.h"
+#include "aom/aom_codec.h"
+#include "aom/aom_integer.h"
+#include "aom_ports/mem.h"
+#include "aom_ports/msvc.h"  // for round()
+
+using libaom_test::ACMRandom;
+
+namespace {
+
+const int kNumCoeffs = 256;
+const double C1 = 0.995184726672197;
+const double C2 = 0.98078528040323;
+const double C3 = 0.956940335732209;
+const double C4 = 0.923879532511287;
+const double C5 = 0.881921264348355;
+const double C6 = 0.831469612302545;
+const double C7 = 0.773010453362737;
+const double C8 = 0.707106781186548;
+const double C9 = 0.634393284163646;
+const double C10 = 0.555570233019602;
+const double C11 = 0.471396736825998;
+const double C12 = 0.38268343236509;
+const double C13 = 0.290284677254462;
+const double C14 = 0.195090322016128;
+const double C15 = 0.098017140329561;
+
+void butterfly_16x16_dct_1d(double input[16], double output[16]) {
+  double step[16];
+  double intermediate[16];
+  double temp1, temp2;
+
+  // step 1
+  step[0] = input[0] + input[15];
+  step[1] = input[1] + input[14];
+  step[2] = input[2] + input[13];
+  step[3] = input[3] + input[12];
+  step[4] = input[4] + input[11];
+  step[5] = input[5] + input[10];
+  step[6] = input[6] + input[9];
+  step[7] = input[7] + input[8];
+  step[8] = input[7] - input[8];
+  step[9] = input[6] - input[9];
+  step[10] = input[5] - input[10];
+  step[11] = input[4] - input[11];
+  step[12] = input[3] - input[12];
+  step[13] = input[2] - input[13];
+  step[14] = input[1] - input[14];
+  step[15] = input[0] - input[15];
+
+  // step 2
+  output[0] = step[0] + step[7];
+  output[1] = step[1] + step[6];
+  output[2] = step[2] + step[5];
+  output[3] = step[3] + step[4];
+  output[4] = step[3] - step[4];
+  output[5] = step[2] - step[5];
+  output[6] = step[1] - step[6];
+  output[7] = step[0] - step[7];
+
+  temp1 = step[8] * C7;
+  temp2 = step[15] * C9;
+  output[8] = temp1 + temp2;
+
+  temp1 = step[9] * C11;
+  temp2 = step[14] * C5;
+  output[9] = temp1 - temp2;
+
+  temp1 = step[10] * C3;
+  temp2 = step[13] * C13;
+  output[10] = temp1 + temp2;
+
+  temp1 = step[11] * C15;
+  temp2 = step[12] * C1;
+  output[11] = temp1 - temp2;
+
+  temp1 = step[11] * C1;
+  temp2 = step[12] * C15;
+  output[12] = temp2 + temp1;
+
+  temp1 = step[10] * C13;
+  temp2 = step[13] * C3;
+  output[13] = temp2 - temp1;
+
+  temp1 = step[9] * C5;
+  temp2 = step[14] * C11;
+  output[14] = temp2 + temp1;
+
+  temp1 = step[8] * C9;
+  temp2 = step[15] * C7;
+  output[15] = temp2 - temp1;
+
+  // step 3
+  step[0] = output[0] + output[3];
+  step[1] = output[1] + output[2];
+  step[2] = output[1] - output[2];
+  step[3] = output[0] - output[3];
+
+  temp1 = output[4] * C14;
+  temp2 = output[7] * C2;
+  step[4] = temp1 + temp2;
+
+  temp1 = output[5] * C10;
+  temp2 = output[6] * C6;
+  step[5] = temp1 + temp2;
+
+  temp1 = output[5] * C6;
+  temp2 = output[6] * C10;
+  step[6] = temp2 - temp1;
+
+  temp1 = output[4] * C2;
+  temp2 = output[7] * C14;
+  step[7] = temp2 - temp1;
+
+  step[8] = output[8] + output[11];
+  step[9] = output[9] + output[10];
+  step[10] = output[9] - output[10];
+  step[11] = output[8] - output[11];
+
+  step[12] = output[12] + output[15];
+  step[13] = output[13] + output[14];
+  step[14] = output[13] - output[14];
+  step[15] = output[12] - output[15];
+
+  // step 4
+  output[0] = (step[0] + step[1]);
+  output[8] = (step[0] - step[1]);
+
+  temp1 = step[2] * C12;
+  temp2 = step[3] * C4;
+  temp1 = temp1 + temp2;
+  output[4] = 2 * (temp1 * C8);
+
+  temp1 = step[2] * C4;
+  temp2 = step[3] * C12;
+  temp1 = temp2 - temp1;
+  output[12] = 2 * (temp1 * C8);
+
+  output[2] = 2 * ((step[4] + step[5]) * C8);
+  output[14] = 2 * ((step[7] - step[6]) * C8);
+
+  temp1 = step[4] - step[5];
+  temp2 = step[6] + step[7];
+  output[6] = (temp1 + temp2);
+  output[10] = (temp1 - temp2);
+
+  intermediate[8] = step[8] + step[14];
+  intermediate[9] = step[9] + step[15];
+
+  temp1 = intermediate[8] * C12;
+  temp2 = intermediate[9] * C4;
+  temp1 = temp1 - temp2;
+  output[3] = 2 * (temp1 * C8);
+
+  temp1 = intermediate[8] * C4;
+  temp2 = intermediate[9] * C12;
+  temp1 = temp2 + temp1;
+  output[13] = 2 * (temp1 * C8);
+
+  output[9] = 2 * ((step[10] + step[11]) * C8);
+
+  intermediate[11] = step[10] - step[11];
+  intermediate[12] = step[12] + step[13];
+  intermediate[13] = step[12] - step[13];
+  intermediate[14] = step[8] - step[14];
+  intermediate[15] = step[9] - step[15];
+
+  output[15] = (intermediate[11] + intermediate[12]);
+  output[1] = -(intermediate[11] - intermediate[12]);
+
+  output[7] = 2 * (intermediate[13] * C8);
+
+  temp1 = intermediate[14] * C12;
+  temp2 = intermediate[15] * C4;
+  temp1 = temp1 - temp2;
+  output[11] = -2 * (temp1 * C8);
+
+  temp1 = intermediate[14] * C4;
+  temp2 = intermediate[15] * C12;
+  temp1 = temp2 + temp1;
+  output[5] = 2 * (temp1 * C8);
+}
+
+void reference_16x16_dct_2d(int16_t input[256], double output[256]) {
+  // First transform columns
+  for (int i = 0; i < 16; ++i) {
+    double temp_in[16], temp_out[16];
+    for (int j = 0; j < 16; ++j) temp_in[j] = input[j * 16 + i];
+    butterfly_16x16_dct_1d(temp_in, temp_out);
+    for (int j = 0; j < 16; ++j) output[j * 16 + i] = temp_out[j];
+  }
+  // Then transform rows
+  for (int i = 0; i < 16; ++i) {
+    double temp_in[16], temp_out[16];
+    for (int j = 0; j < 16; ++j) temp_in[j] = output[j + i * 16];
+    butterfly_16x16_dct_1d(temp_in, temp_out);
+    // Scale by some magic number
+    for (int j = 0; j < 16; ++j) output[j + i * 16] = temp_out[j] / 2;
+  }
+}
+
+typedef void (*FdctFunc)(const int16_t *in, tran_low_t *out, int stride);
+typedef void (*IdctFunc)(const tran_low_t *in, uint8_t *out, int stride);
+typedef void (*FhtFunc)(const int16_t *in, tran_low_t *out, int stride,
+                        int tx_type);
+typedef void (*IhtFunc)(const tran_low_t *in, uint8_t *out, int stride,
+                        int tx_type);
+
+typedef std::tr1::tuple<FdctFunc, IdctFunc, int, aom_bit_depth_t> Dct16x16Param;
+typedef std::tr1::tuple<FhtFunc, IhtFunc, int, aom_bit_depth_t> Ht16x16Param;
+typedef std::tr1::tuple<IdctFunc, IdctFunc, int, aom_bit_depth_t>
+    Idct16x16Param;
+
+void fdct16x16_ref(const int16_t *in, tran_low_t *out, int stride,
+                   int /*tx_type*/) {
+  aom_fdct16x16_c(in, out, stride);
+}
+
+void idct16x16_ref(const tran_low_t *in, uint8_t *dest, int stride,
+                   int /*tx_type*/) {
+  aom_idct16x16_256_add_c(in, dest, stride);
+}
+
+void fht16x16_ref(const int16_t *in, tran_low_t *out, int stride, int tx_type) {
+  av1_fht16x16_c(in, out, stride, tx_type);
+}
+
+void iht16x16_ref(const tran_low_t *in, uint8_t *dest, int stride,
+                  int tx_type) {
+  av1_iht16x16_256_add_c(in, dest, stride, tx_type);
+}
+
+#if CONFIG_HIGHBITDEPTH
+void iht16x16_10(const tran_low_t *in, uint8_t *out, int stride, int tx_type) {
+  av1_highbd_iht16x16_256_add_c(in, out, stride, tx_type, 10);
+}
+
+void iht16x16_12(const tran_low_t *in, uint8_t *out, int stride, int tx_type) {
+  av1_highbd_iht16x16_256_add_c(in, out, stride, tx_type, 12);
+}
+#endif  // CONFIG_HIGHBITDEPTH
+
+class Trans16x16TestBase {
+ public:
+  virtual ~Trans16x16TestBase() {}
+
+ protected:
+  virtual void RunFwdTxfm(int16_t *in, tran_low_t *out, int stride) = 0;
+
+  virtual void RunInvTxfm(tran_low_t *out, uint8_t *dst, int stride) = 0;
+
+  void RunAccuracyCheck() {
+    ACMRandom rnd(ACMRandom::DeterministicSeed());
+    uint32_t max_error = 0;
+    int64_t total_error = 0;
+    const int count_test_block = 10000;
+    for (int i = 0; i < count_test_block; ++i) {
+      DECLARE_ALIGNED(16, int16_t, test_input_block[kNumCoeffs]);
+      DECLARE_ALIGNED(16, tran_low_t, test_temp_block[kNumCoeffs]);
+      DECLARE_ALIGNED(16, uint8_t, dst[kNumCoeffs]);
+      DECLARE_ALIGNED(16, uint8_t, src[kNumCoeffs]);
+#if CONFIG_HIGHBITDEPTH
+      DECLARE_ALIGNED(16, uint16_t, dst16[kNumCoeffs]);
+      DECLARE_ALIGNED(16, uint16_t, src16[kNumCoeffs]);
+#endif
+
+      // Initialize a test block with input range [-mask_, mask_].
+      for (int j = 0; j < kNumCoeffs; ++j) {
+        if (bit_depth_ == AOM_BITS_8) {
+          src[j] = rnd.Rand8();
+          dst[j] = rnd.Rand8();
+          test_input_block[j] = src[j] - dst[j];
+#if CONFIG_HIGHBITDEPTH
+        } else {
+          src16[j] = rnd.Rand16() & mask_;
+          dst16[j] = rnd.Rand16() & mask_;
+          test_input_block[j] = src16[j] - dst16[j];
+#endif
+        }
+      }
+
+      ASM_REGISTER_STATE_CHECK(
+          RunFwdTxfm(test_input_block, test_temp_block, pitch_));
+      if (bit_depth_ == AOM_BITS_8) {
+        ASM_REGISTER_STATE_CHECK(RunInvTxfm(test_temp_block, dst, pitch_));
+#if CONFIG_HIGHBITDEPTH
+      } else {
+        ASM_REGISTER_STATE_CHECK(
+            RunInvTxfm(test_temp_block, CONVERT_TO_BYTEPTR(dst16), pitch_));
+#endif
+      }
+
+      for (int j = 0; j < kNumCoeffs; ++j) {
+#if CONFIG_HIGHBITDEPTH
+        const int32_t diff =
+            bit_depth_ == AOM_BITS_8 ? dst[j] - src[j] : dst16[j] - src16[j];
+#else
+        const int32_t diff = dst[j] - src[j];
+#endif
+        const uint32_t error = diff * diff;
+        if (max_error < error) max_error = error;
+        total_error += error;
+      }
+    }
+
+    EXPECT_GE(1u << 2 * (bit_depth_ - 8), max_error)
+        << "Error: 16x16 FHT/IHT has an individual round trip error > 1";
+
+    EXPECT_GE(count_test_block << 2 * (bit_depth_ - 8), total_error)
+        << "Error: 16x16 FHT/IHT has average round trip error > 1 per block";
+  }
+
+  void RunCoeffCheck() {
+    ACMRandom rnd(ACMRandom::DeterministicSeed());
+    const int count_test_block = 1000;
+    DECLARE_ALIGNED(16, int16_t, input_block[kNumCoeffs]);
+    DECLARE_ALIGNED(16, tran_low_t, output_ref_block[kNumCoeffs]);
+    DECLARE_ALIGNED(16, tran_low_t, output_block[kNumCoeffs]);
+
+    for (int i = 0; i < count_test_block; ++i) {
+      // Initialize a test block with input range [-mask_, mask_].
+      for (int j = 0; j < kNumCoeffs; ++j)
+        input_block[j] = (rnd.Rand16() & mask_) - (rnd.Rand16() & mask_);
+
+      fwd_txfm_ref(input_block, output_ref_block, pitch_, tx_type_);
+      ASM_REGISTER_STATE_CHECK(RunFwdTxfm(input_block, output_block, pitch_));
+
+      // The minimum quant value is 4.
+      for (int j = 0; j < kNumCoeffs; ++j)
+        EXPECT_EQ(output_block[j], output_ref_block[j]);
+    }
+  }
+
+  void RunMemCheck() {
+    ACMRandom rnd(ACMRandom::DeterministicSeed());
+    const int count_test_block = 1000;
+    DECLARE_ALIGNED(16, int16_t, input_extreme_block[kNumCoeffs]);
+    DECLARE_ALIGNED(16, tran_low_t, output_ref_block[kNumCoeffs]);
+    DECLARE_ALIGNED(16, tran_low_t, output_block[kNumCoeffs]);
+
+    for (int i = 0; i < count_test_block; ++i) {
+      // Initialize a test block with input range [-mask_, mask_].
+      for (int j = 0; j < kNumCoeffs; ++j) {
+        input_extreme_block[j] = rnd.Rand8() % 2 ? mask_ : -mask_;
+      }
+      if (i == 0) {
+        for (int j = 0; j < kNumCoeffs; ++j) input_extreme_block[j] = mask_;
+      } else if (i == 1) {
+        for (int j = 0; j < kNumCoeffs; ++j) input_extreme_block[j] = -mask_;
+      }
+
+      fwd_txfm_ref(input_extreme_block, output_ref_block, pitch_, tx_type_);
+      ASM_REGISTER_STATE_CHECK(
+          RunFwdTxfm(input_extreme_block, output_block, pitch_));
+
+      // The minimum quant value is 4.
+      for (int j = 0; j < kNumCoeffs; ++j) {
+        EXPECT_EQ(output_block[j], output_ref_block[j]);
+        EXPECT_GE(4 * DCT_MAX_VALUE << (bit_depth_ - 8), abs(output_block[j]))
+            << "Error: 16x16 FDCT has coefficient larger than 4*DCT_MAX_VALUE";
+      }
+    }
+  }
+
+  void RunQuantCheck(int dc_thred, int ac_thred) {
+    ACMRandom rnd(ACMRandom::DeterministicSeed());
+    const int count_test_block = 100000;
+    DECLARE_ALIGNED(16, int16_t, input_extreme_block[kNumCoeffs]);
+    DECLARE_ALIGNED(16, tran_low_t, output_ref_block[kNumCoeffs]);
+
+    DECLARE_ALIGNED(16, uint8_t, dst[kNumCoeffs]);
+    DECLARE_ALIGNED(16, uint8_t, ref[kNumCoeffs]);
+#if CONFIG_HIGHBITDEPTH
+    DECLARE_ALIGNED(16, uint16_t, dst16[kNumCoeffs]);
+    DECLARE_ALIGNED(16, uint16_t, ref16[kNumCoeffs]);
+#endif
+
+    for (int i = 0; i < count_test_block; ++i) {
+      // Initialize a test block with input range [-mask_, mask_].
+      for (int j = 0; j < kNumCoeffs; ++j) {
+        input_extreme_block[j] = rnd.Rand8() % 2 ? mask_ : -mask_;
+      }
+      if (i == 0)
+        for (int j = 0; j < kNumCoeffs; ++j) input_extreme_block[j] = mask_;
+      if (i == 1)
+        for (int j = 0; j < kNumCoeffs; ++j) input_extreme_block[j] = -mask_;
+
+      fwd_txfm_ref(input_extreme_block, output_ref_block, pitch_, tx_type_);
+
+      // clear reconstructed pixel buffers
+      memset(dst, 0, kNumCoeffs * sizeof(uint8_t));
+      memset(ref, 0, kNumCoeffs * sizeof(uint8_t));
+#if CONFIG_HIGHBITDEPTH
+      memset(dst16, 0, kNumCoeffs * sizeof(uint16_t));
+      memset(ref16, 0, kNumCoeffs * sizeof(uint16_t));
+#endif
+
+      // quantization with maximum allowed step sizes
+      output_ref_block[0] = (output_ref_block[0] / dc_thred) * dc_thred;
+      for (int j = 1; j < kNumCoeffs; ++j)
+        output_ref_block[j] = (output_ref_block[j] / ac_thred) * ac_thred;
+      if (bit_depth_ == AOM_BITS_8) {
+        inv_txfm_ref(output_ref_block, ref, pitch_, tx_type_);
+        ASM_REGISTER_STATE_CHECK(RunInvTxfm(output_ref_block, dst, pitch_));
+#if CONFIG_HIGHBITDEPTH
+      } else {
+        inv_txfm_ref(output_ref_block, CONVERT_TO_BYTEPTR(ref16), pitch_,
+                     tx_type_);
+        ASM_REGISTER_STATE_CHECK(
+            RunInvTxfm(output_ref_block, CONVERT_TO_BYTEPTR(dst16), pitch_));
+#endif
+      }
+      if (bit_depth_ == AOM_BITS_8) {
+        for (int j = 0; j < kNumCoeffs; ++j) EXPECT_EQ(ref[j], dst[j]);
+#if CONFIG_HIGHBITDEPTH
+      } else {
+        for (int j = 0; j < kNumCoeffs; ++j) EXPECT_EQ(ref16[j], dst16[j]);
+#endif
+      }
+    }
+  }
+
+  void RunInvAccuracyCheck() {
+    ACMRandom rnd(ACMRandom::DeterministicSeed());
+    const int count_test_block = 1000;
+    DECLARE_ALIGNED(16, int16_t, in[kNumCoeffs]);
+    DECLARE_ALIGNED(16, tran_low_t, coeff[kNumCoeffs]);
+    DECLARE_ALIGNED(16, uint8_t, dst[kNumCoeffs]);
+    DECLARE_ALIGNED(16, uint8_t, src[kNumCoeffs]);
+#if CONFIG_HIGHBITDEPTH
+    DECLARE_ALIGNED(16, uint16_t, dst16[kNumCoeffs]);
+    DECLARE_ALIGNED(16, uint16_t, src16[kNumCoeffs]);
+#endif  // CONFIG_HIGHBITDEPTH
+
+    for (int i = 0; i < count_test_block; ++i) {
+      double out_r[kNumCoeffs];
+
+      // Initialize a test block with input range [-255, 255].
+      for (int j = 0; j < kNumCoeffs; ++j) {
+        if (bit_depth_ == AOM_BITS_8) {
+          src[j] = rnd.Rand8();
+          dst[j] = rnd.Rand8();
+          in[j] = src[j] - dst[j];
+#if CONFIG_HIGHBITDEPTH
+        } else {
+          src16[j] = rnd.Rand16() & mask_;
+          dst16[j] = rnd.Rand16() & mask_;
+          in[j] = src16[j] - dst16[j];
+#endif  // CONFIG_HIGHBITDEPTH
+        }
+      }
+
+      reference_16x16_dct_2d(in, out_r);
+      for (int j = 0; j < kNumCoeffs; ++j)
+        coeff[j] = static_cast<tran_low_t>(round(out_r[j]));
+
+      if (bit_depth_ == AOM_BITS_8) {
+        ASM_REGISTER_STATE_CHECK(RunInvTxfm(coeff, dst, 16));
+#if CONFIG_HIGHBITDEPTH
+      } else {
+        ASM_REGISTER_STATE_CHECK(
+            RunInvTxfm(coeff, CONVERT_TO_BYTEPTR(dst16), 16));
+#endif  // CONFIG_HIGHBITDEPTH
+      }
+
+      for (int j = 0; j < kNumCoeffs; ++j) {
+#if CONFIG_HIGHBITDEPTH
+        const int diff =
+            bit_depth_ == AOM_BITS_8 ? dst[j] - src[j] : dst16[j] - src16[j];
+#else
+        const int diff = dst[j] - src[j];
+#endif  // CONFIG_HIGHBITDEPTH
+        const uint32_t error = diff * diff;
+        EXPECT_GE(1u, error) << "Error: 16x16 IDCT has error " << error
+                             << " at index " << j;
+      }
+    }
+  }
+
+  void CompareInvReference(IdctFunc ref_txfm, int thresh) {
+    ACMRandom rnd(ACMRandom::DeterministicSeed());
+    const int count_test_block = 10000;
+    const int eob = 10;
+    const int16_t *scan = av1_default_scan_orders[TX_16X16].scan;
+    DECLARE_ALIGNED(16, tran_low_t, coeff[kNumCoeffs]);
+    DECLARE_ALIGNED(16, uint8_t, dst[kNumCoeffs]);
+    DECLARE_ALIGNED(16, uint8_t, ref[kNumCoeffs]);
+#if CONFIG_HIGHBITDEPTH
+    DECLARE_ALIGNED(16, uint16_t, dst16[kNumCoeffs]);
+    DECLARE_ALIGNED(16, uint16_t, ref16[kNumCoeffs]);
+#endif  // CONFIG_HIGHBITDEPTH
+
+    for (int i = 0; i < count_test_block; ++i) {
+      for (int j = 0; j < kNumCoeffs; ++j) {
+        if (j < eob) {
+          // Random values less than the threshold, either positive or negative
+          coeff[scan[j]] = rnd(thresh) * (1 - 2 * (i % 2));
+        } else {
+          coeff[scan[j]] = 0;
+        }
+        if (bit_depth_ == AOM_BITS_8) {
+          dst[j] = 0;
+          ref[j] = 0;
+#if CONFIG_HIGHBITDEPTH
+        } else {
+          dst16[j] = 0;
+          ref16[j] = 0;
+#endif  // CONFIG_HIGHBITDEPTH
+        }
+      }
+      if (bit_depth_ == AOM_BITS_8) {
+        ref_txfm(coeff, ref, pitch_);
+        ASM_REGISTER_STATE_CHECK(RunInvTxfm(coeff, dst, pitch_));
+      } else {
+#if CONFIG_HIGHBITDEPTH
+        ref_txfm(coeff, CONVERT_TO_BYTEPTR(ref16), pitch_);
+        ASM_REGISTER_STATE_CHECK(
+            RunInvTxfm(coeff, CONVERT_TO_BYTEPTR(dst16), pitch_));
+#endif  // CONFIG_HIGHBITDEPTH
+      }
+
+      for (int j = 0; j < kNumCoeffs; ++j) {
+#if CONFIG_HIGHBITDEPTH
+        const int diff =
+            bit_depth_ == AOM_BITS_8 ? dst[j] - ref[j] : dst16[j] - ref16[j];
+#else
+        const int diff = dst[j] - ref[j];
+#endif  // CONFIG_HIGHBITDEPTH
+        const uint32_t error = diff * diff;
+        EXPECT_EQ(0u, error) << "Error: 16x16 IDCT Comparison has error "
+                             << error << " at index " << j;
+      }
+    }
+  }
+
+  int pitch_;
+  int tx_type_;
+  aom_bit_depth_t bit_depth_;
+  int mask_;
+  FhtFunc fwd_txfm_ref;
+  IhtFunc inv_txfm_ref;
+};
+
+class Trans16x16DCT : public Trans16x16TestBase,
+                      public ::testing::TestWithParam<Dct16x16Param> {
+ public:
+  virtual ~Trans16x16DCT() {}
+
+  virtual void SetUp() {
+    fwd_txfm_ = GET_PARAM(0);
+    inv_txfm_ = GET_PARAM(1);
+    tx_type_ = GET_PARAM(2);
+    bit_depth_ = GET_PARAM(3);
+    pitch_ = 16;
+    fwd_txfm_ref = fdct16x16_ref;
+    inv_txfm_ref = idct16x16_ref;
+    mask_ = (1 << bit_depth_) - 1;
+    inv_txfm_ref = idct16x16_ref;
+  }
+  virtual void TearDown() { libaom_test::ClearSystemState(); }
+
+ protected:
+  void RunFwdTxfm(int16_t *in, tran_low_t *out, int stride) {
+    fwd_txfm_(in, out, stride);
+  }
+  void RunInvTxfm(tran_low_t *out, uint8_t *dst, int stride) {
+    inv_txfm_(out, dst, stride);
+  }
+
+  FdctFunc fwd_txfm_;
+  IdctFunc inv_txfm_;
+};
+
+TEST_P(Trans16x16DCT, AccuracyCheck) { RunAccuracyCheck(); }
+
+TEST_P(Trans16x16DCT, CoeffCheck) { RunCoeffCheck(); }
+
+TEST_P(Trans16x16DCT, MemCheck) { RunMemCheck(); }
+
+TEST_P(Trans16x16DCT, QuantCheck) {
+  // Use maximally allowed quantization step sizes for DC and AC
+  // coefficients respectively.
+  RunQuantCheck(1336, 1828);
+}
+
+TEST_P(Trans16x16DCT, InvAccuracyCheck) { RunInvAccuracyCheck(); }
+
+class Trans16x16HT : public Trans16x16TestBase,
+                     public ::testing::TestWithParam<Ht16x16Param> {
+ public:
+  virtual ~Trans16x16HT() {}
+
+  virtual void SetUp() {
+    fwd_txfm_ = GET_PARAM(0);
+    inv_txfm_ = GET_PARAM(1);
+    tx_type_ = GET_PARAM(2);
+    bit_depth_ = GET_PARAM(3);
+    pitch_ = 16;
+    fwd_txfm_ref = fht16x16_ref;
+    inv_txfm_ref = iht16x16_ref;
+    mask_ = (1 << bit_depth_) - 1;
+#if CONFIG_HIGHBITDEPTH
+    switch (bit_depth_) {
+      case AOM_BITS_10: inv_txfm_ref = iht16x16_10; break;
+      case AOM_BITS_12: inv_txfm_ref = iht16x16_12; break;
+      default: inv_txfm_ref = iht16x16_ref; break;
+    }
+#else
+    inv_txfm_ref = iht16x16_ref;
+#endif
+  }
+  virtual void TearDown() { libaom_test::ClearSystemState(); }
+
+ protected:
+  void RunFwdTxfm(int16_t *in, tran_low_t *out, int stride) {
+    fwd_txfm_(in, out, stride, tx_type_);
+  }
+  void RunInvTxfm(tran_low_t *out, uint8_t *dst, int stride) {
+    inv_txfm_(out, dst, stride, tx_type_);
+  }
+
+  FhtFunc fwd_txfm_;
+  IhtFunc inv_txfm_;
+};
+
+TEST_P(Trans16x16HT, AccuracyCheck) { RunAccuracyCheck(); }
+
+TEST_P(Trans16x16HT, CoeffCheck) { RunCoeffCheck(); }
+
+TEST_P(Trans16x16HT, MemCheck) { RunMemCheck(); }
+
+TEST_P(Trans16x16HT, QuantCheck) {
+  // The encoder skips any non-DC intra prediction modes,
+  // when the quantization step size goes beyond 988.
+  RunQuantCheck(429, 729);
+}
+
+class InvTrans16x16DCT : public Trans16x16TestBase,
+                         public ::testing::TestWithParam<Idct16x16Param> {
+ public:
+  virtual ~InvTrans16x16DCT() {}
+
+  virtual void SetUp() {
+    ref_txfm_ = GET_PARAM(0);
+    inv_txfm_ = GET_PARAM(1);
+    thresh_ = GET_PARAM(2);
+    bit_depth_ = GET_PARAM(3);
+    pitch_ = 16;
+    mask_ = (1 << bit_depth_) - 1;
+  }
+  virtual void TearDown() { libaom_test::ClearSystemState(); }
+
+ protected:
+  void RunFwdTxfm(int16_t * /*in*/, tran_low_t * /*out*/, int /*stride*/) {}
+  void RunInvTxfm(tran_low_t *out, uint8_t *dst, int stride) {
+    inv_txfm_(out, dst, stride);
+  }
+
+  IdctFunc ref_txfm_;
+  IdctFunc inv_txfm_;
+  int thresh_;
+};
+
+TEST_P(InvTrans16x16DCT, CompareReference) {
+  CompareInvReference(ref_txfm_, thresh_);
+}
+
+class PartialTrans16x16Test : public ::testing::TestWithParam<
+                                  std::tr1::tuple<FdctFunc, aom_bit_depth_t> > {
+ public:
+  virtual ~PartialTrans16x16Test() {}
+  virtual void SetUp() {
+    fwd_txfm_ = GET_PARAM(0);
+    bit_depth_ = GET_PARAM(1);
+  }
+
+  virtual void TearDown() { libaom_test::ClearSystemState(); }
+
+ protected:
+  aom_bit_depth_t bit_depth_;
+  FdctFunc fwd_txfm_;
+};
+
+TEST_P(PartialTrans16x16Test, Extremes) {
+#if CONFIG_HIGHBITDEPTH
+  const int16_t maxval =
+      static_cast<int16_t>(clip_pixel_highbd(1 << 30, bit_depth_));
+#else
+  const int16_t maxval = 255;
+#endif
+  const int minval = -maxval;
+  DECLARE_ALIGNED(16, int16_t, input[kNumCoeffs]);
+  DECLARE_ALIGNED(16, tran_low_t, output[kNumCoeffs]);
+
+  for (int i = 0; i < kNumCoeffs; ++i) input[i] = maxval;
+  output[0] = 0;
+  ASM_REGISTER_STATE_CHECK(fwd_txfm_(input, output, 16));
+  EXPECT_EQ((maxval * kNumCoeffs) >> 1, output[0]);
+
+  for (int i = 0; i < kNumCoeffs; ++i) input[i] = minval;
+  output[0] = 0;
+  ASM_REGISTER_STATE_CHECK(fwd_txfm_(input, output, 16));
+  EXPECT_EQ((minval * kNumCoeffs) >> 1, output[0]);
+}
+
+TEST_P(PartialTrans16x16Test, Random) {
+#if CONFIG_HIGHBITDEPTH
+  const int16_t maxval =
+      static_cast<int16_t>(clip_pixel_highbd(1 << 30, bit_depth_));
+#else
+  const int16_t maxval = 255;
+#endif
+  DECLARE_ALIGNED(16, int16_t, input[kNumCoeffs]);
+  DECLARE_ALIGNED(16, tran_low_t, output[kNumCoeffs]);
+  ACMRandom rnd(ACMRandom::DeterministicSeed());
+
+  int sum = 0;
+  for (int i = 0; i < kNumCoeffs; ++i) {
+    const int val = (i & 1) ? -rnd(maxval + 1) : rnd(maxval + 1);
+    input[i] = val;
+    sum += val;
+  }
+  output[0] = 0;
+  ASM_REGISTER_STATE_CHECK(fwd_txfm_(input, output, 16));
+  EXPECT_EQ(sum >> 1, output[0]);
+}
+
+using std::tr1::make_tuple;
+
+#if CONFIG_HIGHBITDEPTH
+INSTANTIATE_TEST_CASE_P(C, Trans16x16DCT,
+                        ::testing::Values(make_tuple(&aom_fdct16x16_c,
+                                                     &aom_idct16x16_256_add_c,
+                                                     0, AOM_BITS_8)));
+#else
+INSTANTIATE_TEST_CASE_P(C, Trans16x16DCT,
+                        ::testing::Values(make_tuple(&aom_fdct16x16_c,
+                                                     &aom_idct16x16_256_add_c,
+                                                     0, AOM_BITS_8)));
+#endif  // CONFIG_HIGHBITDEPTH
+
+#if CONFIG_HIGHBITDEPTH
+INSTANTIATE_TEST_CASE_P(
+    C, Trans16x16HT,
+    ::testing::Values(
+        make_tuple(&av1_highbd_fht16x16_c, &iht16x16_10, 0, AOM_BITS_10),
+        make_tuple(&av1_highbd_fht16x16_c, &iht16x16_10, 1, AOM_BITS_10),
+        make_tuple(&av1_highbd_fht16x16_c, &iht16x16_10, 2, AOM_BITS_10),
+        make_tuple(&av1_highbd_fht16x16_c, &iht16x16_10, 3, AOM_BITS_10),
+        make_tuple(&av1_highbd_fht16x16_c, &iht16x16_12, 0, AOM_BITS_12),
+        make_tuple(&av1_highbd_fht16x16_c, &iht16x16_12, 1, AOM_BITS_12),
+        make_tuple(&av1_highbd_fht16x16_c, &iht16x16_12, 2, AOM_BITS_12),
+        make_tuple(&av1_highbd_fht16x16_c, &iht16x16_12, 3, AOM_BITS_12),
+        make_tuple(&av1_fht16x16_c, &av1_iht16x16_256_add_c, 0, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_c, &av1_iht16x16_256_add_c, 1, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_c, &av1_iht16x16_256_add_c, 2, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_c, &av1_iht16x16_256_add_c, 3, AOM_BITS_8)));
+INSTANTIATE_TEST_CASE_P(
+    C, PartialTrans16x16Test,
+    ::testing::Values(make_tuple(&aom_highbd_fdct16x16_1_c, AOM_BITS_8),
+                      make_tuple(&aom_highbd_fdct16x16_1_c, AOM_BITS_10),
+                      make_tuple(&aom_highbd_fdct16x16_1_c, AOM_BITS_12)));
+#else
+INSTANTIATE_TEST_CASE_P(
+    C, Trans16x16HT,
+    ::testing::Values(
+        make_tuple(&av1_fht16x16_c, &av1_iht16x16_256_add_c, 0, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_c, &av1_iht16x16_256_add_c, 1, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_c, &av1_iht16x16_256_add_c, 2, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_c, &av1_iht16x16_256_add_c, 3, AOM_BITS_8)));
+INSTANTIATE_TEST_CASE_P(C, PartialTrans16x16Test,
+                        ::testing::Values(make_tuple(&aom_fdct16x16_1_c,
+                                                     AOM_BITS_8)));
+#endif  // CONFIG_HIGHBITDEPTH
+
+#if HAVE_NEON_ASM && !CONFIG_HIGHBITDEPTH
+INSTANTIATE_TEST_CASE_P(
+    NEON, Trans16x16DCT,
+    ::testing::Values(make_tuple(&aom_fdct16x16_c, &aom_idct16x16_256_add_neon,
+                                 0, AOM_BITS_8)));
+#endif
+
+#if HAVE_SSE2 && !CONFIG_HIGHBITDEPTH
+INSTANTIATE_TEST_CASE_P(
+    SSE2, Trans16x16DCT,
+    ::testing::Values(make_tuple(&aom_fdct16x16_sse2,
+                                 &aom_idct16x16_256_add_sse2, 0, AOM_BITS_8)));
+INSTANTIATE_TEST_CASE_P(
+    SSE2, Trans16x16HT,
+    ::testing::Values(make_tuple(&av1_fht16x16_sse2, &av1_iht16x16_256_add_sse2,
+                                 0, AOM_BITS_8),
+                      make_tuple(&av1_fht16x16_sse2, &av1_iht16x16_256_add_sse2,
+                                 1, AOM_BITS_8),
+                      make_tuple(&av1_fht16x16_sse2, &av1_iht16x16_256_add_sse2,
+                                 2, AOM_BITS_8),
+                      make_tuple(&av1_fht16x16_sse2, &av1_iht16x16_256_add_sse2,
+                                 3, AOM_BITS_8)));
+INSTANTIATE_TEST_CASE_P(SSE2, PartialTrans16x16Test,
+                        ::testing::Values(make_tuple(&aom_fdct16x16_1_sse2,
+                                                     AOM_BITS_8)));
+#endif  // HAVE_SSE2 && !CONFIG_HIGHBITDEPTH
+
+#if HAVE_AVX2 && !CONFIG_HIGHBITDEPTH
+INSTANTIATE_TEST_CASE_P(AVX2, PartialTrans16x16Test,
+                        ::testing::Values(make_tuple(&aom_fdct16x16_1_avx2,
+                                                     AOM_BITS_8)));
+#endif  // HAVE_AVX2 && !CONFIG_HIGHBITDEPTH
+
+#if HAVE_SSE2 && CONFIG_HIGHBITDEPTH
+INSTANTIATE_TEST_CASE_P(SSE2, Trans16x16DCT,
+                        ::testing::Values(make_tuple(&aom_fdct16x16_sse2,
+                                                     &aom_idct16x16_256_add_c,
+                                                     0, AOM_BITS_8)));
+INSTANTIATE_TEST_CASE_P(
+    SSE2, Trans16x16HT,
+    ::testing::Values(
+        make_tuple(&av1_fht16x16_sse2, &av1_iht16x16_256_add_c, 0, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_sse2, &av1_iht16x16_256_add_c, 1, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_sse2, &av1_iht16x16_256_add_c, 2, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_sse2, &av1_iht16x16_256_add_c, 3,
+                   AOM_BITS_8)));
+// TODO(luoyi):
+// For this test case, we should test function: aom_highbd_fdct16x16_1_sse2.
+// However this function is not available yet. if we mistakely test
+// aom_fdct16x16_1_sse2, it could only pass AOM_BITS_8/AOM_BITS_10 but not
+// AOM_BITS_12.
+INSTANTIATE_TEST_CASE_P(SSE2, PartialTrans16x16Test,
+                        ::testing::Values(make_tuple(&aom_fdct16x16_1_sse2,
+                                                     AOM_BITS_8)));
+#endif  // HAVE_SSE2 && CONFIG_HIGHBITDEPTH
+
+#if HAVE_MSA && !CONFIG_HIGHBITDEPTH
+INSTANTIATE_TEST_CASE_P(MSA, Trans16x16DCT,
+                        ::testing::Values(make_tuple(&aom_fdct16x16_msa,
+                                                     &aom_idct16x16_256_add_msa,
+                                                     0, AOM_BITS_8)));
+#if !CONFIG_EXT_TX
+// TODO(yaowu): re-enable this after msa versions are updated to match C.
+INSTANTIATE_TEST_CASE_P(
+    DISABLED_MSA, Trans16x16HT,
+    ::testing::Values(
+        make_tuple(&av1_fht16x16_msa, &av1_iht16x16_256_add_msa, 0, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_msa, &av1_iht16x16_256_add_msa, 1, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_msa, &av1_iht16x16_256_add_msa, 2, AOM_BITS_8),
+        make_tuple(&av1_fht16x16_msa, &av1_iht16x16_256_add_msa, 3,
+                   AOM_BITS_8)));
+#endif  // !CONFIG_EXT_TX
+INSTANTIATE_TEST_CASE_P(MSA, PartialTrans16x16Test,
+                        ::testing::Values(make_tuple(&aom_fdct16x16_1_msa,
+                                                     AOM_BITS_8)));
+#endif  // HAVE_MSA && !CONFIG_HIGHBITDEPTH
+}  // namespace