Import aom library

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

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

third_party/aom/test/av1_inv_txfm1d_test.cc

@@ -0,0 +1,87 @@
+/*
+ * 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 "test/av1_txfm_test.h"
+#include "av1/common/av1_fwd_txfm1d.h"
+#include "av1/common/av1_inv_txfm1d.h"
+
+using libaom_test::ACMRandom;
+using libaom_test::input_base;
+
+namespace {
+const int txfm_type_num = 2;
+const int txfm_size_ls[5] = { 4, 8, 16, 32, 64 };
+
+const TxfmFunc fwd_txfm_func_ls[][2] = {
+  { av1_fdct4_new, av1_fadst4_new },
+  { av1_fdct8_new, av1_fadst8_new },
+  { av1_fdct16_new, av1_fadst16_new },
+  { av1_fdct32_new, av1_fadst32_new },
+#if CONFIG_TX64X64
+  { av1_fdct64_new, NULL },
+#endif
+};
+
+const TxfmFunc inv_txfm_func_ls[][2] = {
+  { av1_idct4_new, av1_iadst4_new },
+  { av1_idct8_new, av1_iadst8_new },
+  { av1_idct16_new, av1_iadst16_new },
+  { av1_idct32_new, av1_iadst32_new },
+#if CONFIG_TX64X64
+  { av1_idct64_new, NULL },
+#endif
+};
+
+// the maximum stage number of fwd/inv 1d dct/adst txfm is 12
+const int8_t cos_bit[12] = { 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14 };
+const int8_t range_bit[12] = { 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32 };
+
+#define ARRAY_SIZE(x) (int)(sizeof(x) / sizeof(x[0]))
+
+TEST(av1_inv_txfm1d, round_trip) {
+  ACMRandom rnd(ACMRandom::DeterministicSeed());
+  for (int si = 0; si < ARRAY_SIZE(fwd_txfm_func_ls); ++si) {
+    int txfm_size = txfm_size_ls[si];
+
+    for (int ti = 0; ti < txfm_type_num; ++ti) {
+      TxfmFunc fwd_txfm_func = fwd_txfm_func_ls[si][ti];
+      TxfmFunc inv_txfm_func = inv_txfm_func_ls[si][ti];
+      int max_error = 2;
+
+      if (!fwd_txfm_func) continue;
+
+      const int count_test_block = 5000;
+      for (int ci = 0; ci < count_test_block; ++ci) {
+        int32_t input[64];
+        int32_t output[64];
+        int32_t round_trip_output[64];
+
+        assert(txfm_size <= ARRAY_SIZE(input));
+
+        for (int ni = 0; ni < txfm_size; ++ni) {
+          input[ni] = rnd.Rand16() % input_base - rnd.Rand16() % input_base;
+        }
+
+        fwd_txfm_func(input, output, cos_bit, range_bit);
+        inv_txfm_func(output, round_trip_output, cos_bit, range_bit);
+
+        for (int ni = 0; ni < txfm_size; ++ni) {
+          int node_err =
+              abs(input[ni] - round_shift(round_trip_output[ni],
+                                          get_max_bit(txfm_size) - 1));
+          EXPECT_LE(node_err, max_error);
+        }
+      }
+    }
+  }
+}
+
+}  // namespace