blob: 2c6e06cade4e6b1f88d4df0f8229c5309c26822a [file] [log] [blame]
/*
* Copyright (c) 2012 The WebRTC 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 MODULES_AUDIO_CODING_NETEQ_RANDOM_VECTOR_H_
#define MODULES_AUDIO_CODING_NETEQ_RANDOM_VECTOR_H_
#include <string.h> // size_t
#include "rtc_base/constructormagic.h"
#include "typedefs.h" // NOLINT(build/include)
namespace webrtc {
// This class generates pseudo-random samples.
class RandomVector {
public:
static const size_t kRandomTableSize = 256;
static const int16_t kRandomTable[kRandomTableSize];
RandomVector() : seed_(777), seed_increment_(1) {}
void Reset();
void Generate(size_t length, int16_t* output);
void IncreaseSeedIncrement(int16_t increase_by);
// Accessors and mutators.
int16_t seed_increment() { return seed_increment_; }
void set_seed_increment(int16_t value) { seed_increment_ = value; }
private:
uint32_t seed_;
int16_t seed_increment_;
RTC_DISALLOW_COPY_AND_ASSIGN(RandomVector);
};
} // namespace webrtc
#endif // MODULES_AUDIO_CODING_NETEQ_RANDOM_VECTOR_H_