Move ACMRandom to acm_random.h

Change-Id: I1d99c56d1e1f521507978737fc661ca90af72507

test/acm_random.h

@@ -0,0 +1,48 @@
+/*
+ *  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.
+ */
+
+#ifndef LIBVPX_TEST_ACM_RANDOM_H_
+#define LIBVPX_TEST_ACM_RANDOM_H_
+
+#include <stdint.h>
+#include <stdlib.h>
+
+namespace libvpx_test {
+
+class ACMRandom {
+ public:
+  explicit ACMRandom(int seed) {
+    Reset(seed);
+  }
+
+  void Reset(int seed) {
+    srand(seed);
+  }
+
+  uint8_t Rand8(void) {
+    return (rand() >> 8) & 0xff;
+  }
+
+  int PseudoUniform(int range) {
+    return (rand() >> 8) % range;
+  }
+
+  int operator()(int n) {
+    return PseudoUniform(n);
+  }
+
+  static int DeterministicSeed(void) {
+    return 0xbaba;
+  }
+};
+
+}  // namespace libvpx_test
+
+#endif  // LIBVPX_TEST_ACM_RANDOM_H_