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, 108 insertions, 0 deletions

diff --git a/third_party/aom/test/av1_dct_test.cc b/third_party/aom/test/av1_dct_test.cc
new file mode 100644
index 000000000..691cc8b79
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+++ b/third_party/aom/test/av1_dct_test.cc
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+/*
+ * 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 <new>
+
+#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
+#include "test/acm_random.h"
+#include "test/util.h"
+#include "./aom_config.h"
+#include "aom_ports/msvc.h"
+
+#undef CONFIG_COEFFICIENT_RANGE_CHECKING
+#define CONFIG_COEFFICIENT_RANGE_CHECKING 1
+#define AV1_DCT_GTEST
+#include "av1/encoder/dct.c"
+
+using libaom_test::ACMRandom;
+
+namespace {
+void reference_dct_1d(const double *in, double *out, int size) {
+  const double kInvSqrt2 = 0.707106781186547524400844362104;
+  for (int k = 0; k < size; ++k) {
+    out[k] = 0;
+    for (int n = 0; n < size; ++n) {
+      out[k] += in[n] * cos(PI * (2 * n + 1) * k / (2 * size));
+    }
+    if (k == 0) out[k] = out[k] * kInvSqrt2;
+  }
+}
+
+typedef void (*FdctFuncRef)(const double *in, double *out, int size);
+typedef void (*IdctFuncRef)(const double *in, double *out, int size);
+typedef void (*FdctFunc)(const tran_low_t *in, tran_low_t *out);
+typedef void (*IdctFunc)(const tran_low_t *in, tran_low_t *out);
+
+class TransTestBase {
+ public:
+  virtual ~TransTestBase() {}
+
+ protected:
+  void RunFwdAccuracyCheck() {
+    tran_low_t *input = new tran_low_t[txfm_size_];
+    tran_low_t *output = new tran_low_t[txfm_size_];
+    double *ref_input = new double[txfm_size_];
+    double *ref_output = new double[txfm_size_];
+
+    ACMRandom rnd(ACMRandom::DeterministicSeed());
+    const int count_test_block = 5000;
+    for (int ti = 0; ti < count_test_block; ++ti) {
+      for (int ni = 0; ni < txfm_size_; ++ni) {
+        input[ni] = rnd.Rand8() - rnd.Rand8();
+        ref_input[ni] = static_cast<double>(input[ni]);
+      }
+
+      fwd_txfm_(input, output);
+      fwd_txfm_ref_(ref_input, ref_output, txfm_size_);
+
+      for (int ni = 0; ni < txfm_size_; ++ni) {
+        EXPECT_LE(
+            abs(output[ni] - static_cast<tran_low_t>(round(ref_output[ni]))),
+            max_error_);
+      }
+    }
+
+    delete[] input;
+    delete[] output;
+    delete[] ref_input;
+    delete[] ref_output;
+  }
+
+  double max_error_;
+  int txfm_size_;
+  FdctFunc fwd_txfm_;
+  FdctFuncRef fwd_txfm_ref_;
+};
+
+typedef std::tr1::tuple<FdctFunc, FdctFuncRef, int, int> FdctParam;
+class AV1FwdTxfm : public TransTestBase,
+                   public ::testing::TestWithParam<FdctParam> {
+ public:
+  virtual void SetUp() {
+    fwd_txfm_ = GET_PARAM(0);
+    fwd_txfm_ref_ = GET_PARAM(1);
+    txfm_size_ = GET_PARAM(2);
+    max_error_ = GET_PARAM(3);
+  }
+  virtual void TearDown() {}
+};
+
+TEST_P(AV1FwdTxfm, RunFwdAccuracyCheck) { RunFwdAccuracyCheck(); }
+
+INSTANTIATE_TEST_CASE_P(
+    C, AV1FwdTxfm,
+    ::testing::Values(FdctParam(&fdct4, &reference_dct_1d, 4, 1),
+                      FdctParam(&fdct8, &reference_dct_1d, 8, 1),
+                      FdctParam(&fdct16, &reference_dct_1d, 16, 2),
+                      FdctParam(&fdct32, &reference_dct_1d, 32, 3)));
+}  // namespace