shithub: libvpx

ref: 6a92df2f3791d1fd2ec6b6a31eba418e450808a8
dir: /test/acm_random.h/

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/*
 *  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 <stdlib.h>

#include "vpx/vpx_integer.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_