From 5545a8983ff0ef1fb52e64aef8e66fa9b13c1cbb Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <email@mattatobin.com>
Date: Tue, 7 Apr 2020 23:30:51 -0400
Subject: Move aom source to a sub-directory under media/libaom

There is no damned reason to treat this differently than any other media lib given its license and there never was.
---
 media/libaom/src/test/scan_test.cc | 133 +++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 media/libaom/src/test/scan_test.cc

(limited to 'media/libaom/src/test/scan_test.cc')

diff --git a/media/libaom/src/test/scan_test.cc b/media/libaom/src/test/scan_test.cc
new file mode 100644
index 000000000..dee2ab5a6
--- /dev/null
+++ b/media/libaom/src/test/scan_test.cc
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2018, 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 "third_party/googletest/src/googletest/include/gtest/gtest.h"
+#include "av1/common/scan.h"
+#include "av1/common/txb_common.h"
+#include "test/av1_txfm_test.h"
+
+static int scan_test(const int16_t *scan, const int16_t *iscan, int si, int r,
+                     int c, int w) {
+  if (iscan[r * w + c] != si || scan[si] != r * w + c) {
+    printf("r %d c %d ref_iscan %d iscan %d ref_scan %d scan %d\n", r, c, si,
+           iscan[r * w + c], r * w + c, scan[si]);
+    return 1;
+  } else {
+    return 0;
+  }
+}
+
+int scan_order_test(const SCAN_ORDER *scan_order, int w, int h,
+                    SCAN_MODE mode) {
+  const int16_t *scan = scan_order->scan;
+  const int16_t *iscan = scan_order->iscan;
+  int dim = w + h - 1;
+  if (mode == SCAN_MODE_ZIG_ZAG) {
+    int si = 0;
+    for (int i = 0; i < dim; ++i) {
+      if (i % 2 == 0) {
+        for (int c = 0; c < w; ++c) {
+          int r = i - c;
+          if (r >= 0 && r < h) {
+            if (scan_test(scan, iscan, si, r, c, w)) return 1;
+            ++si;
+          }
+        }
+      } else {
+        for (int r = 0; r < h; ++r) {
+          int c = i - r;
+          if (c >= 0 && c < w) {
+            if (scan_test(scan, iscan, si, r, c, w)) return 1;
+            ++si;
+          }
+        }
+      }
+    }
+  } else if (mode == SCAN_MODE_COL_DIAG) {
+    int si = 0;
+    for (int i = 0; i < dim; ++i) {
+      for (int c = 0; c < w; ++c) {
+        int r = i - c;
+        if (r >= 0 && r < h) {
+          if (scan_test(scan, iscan, si, r, c, w)) return 1;
+          ++si;
+        }
+      }
+    }
+  } else if (mode == SCAN_MODE_ROW_DIAG) {
+    int si = 0;
+    for (int i = 0; i < dim; ++i) {
+      for (int r = 0; r < h; ++r) {
+        int c = i - r;
+        if (c >= 0 && c < w) {
+          if (scan_test(scan, iscan, si, r, c, w)) return 1;
+          ++si;
+        }
+      }
+    }
+  } else if (mode == SCAN_MODE_ROW_1D) {
+    int si = 0;
+    for (int r = 0; r < h; ++r) {
+      for (int c = 0; c < w; ++c) {
+        if (scan_test(scan, iscan, si, r, c, w)) return 1;
+        ++si;
+      }
+    }
+  } else {
+    assert(mode == SCAN_MODE_COL_1D);
+    int si = 0;
+    for (int c = 0; c < w; ++c) {
+      for (int r = 0; r < h; ++r) {
+        if (scan_test(scan, iscan, si, r, c, w)) return 1;
+        ++si;
+      }
+    }
+  }
+  return 0;
+}
+
+TEST(Av1ScanTest, Dependency) {
+  for (int tx_size = TX_4X4; tx_size < TX_SIZES_ALL; ++tx_size) {
+    const int org_rows = tx_size_high[(TX_SIZE)tx_size];
+    const int org_cols = tx_size_wide[(TX_SIZE)tx_size];
+    const int rows = get_txb_high((TX_SIZE)tx_size);
+    const int cols = get_txb_wide((TX_SIZE)tx_size);
+    for (int tx_type = 0; tx_type < TX_TYPES; ++tx_type) {
+      if (libaom_test::IsTxSizeTypeValid(static_cast<TX_SIZE>(tx_size),
+                                         static_cast<TX_TYPE>(tx_type)) ==
+          false) {
+        continue;
+      }
+      SCAN_MODE scan_mode;
+      TX_CLASS tx_class = tx_type_to_class[(TX_TYPE)tx_type];
+      if (tx_class == TX_CLASS_2D) {
+        if (rows == cols) {
+          scan_mode = SCAN_MODE_ZIG_ZAG;
+        } else if (rows > cols) {
+          scan_mode = SCAN_MODE_ROW_DIAG;
+        } else {
+          scan_mode = SCAN_MODE_COL_DIAG;
+        }
+      } else if (tx_class == TX_CLASS_VERT) {
+        scan_mode = SCAN_MODE_ROW_1D;
+      } else {
+        assert(tx_class == TX_CLASS_HORIZ);
+        scan_mode = SCAN_MODE_COL_1D;
+      }
+      const SCAN_ORDER *scan_order =
+          get_default_scan((TX_SIZE)tx_size, (TX_TYPE)tx_type);
+      ASSERT_EQ(scan_order_test(scan_order, cols, rows, scan_mode), 0)
+          << "scan mismatch tx_class " << tx_class << " tx_type " << tx_type
+          << " tx_w " << org_cols << " tx_h " << org_rows << " scan_mode "
+          << scan_mode << "\n";
+    }
+  }
+}
-- 
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