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/*
* 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 <stddef.h>
#include <stdint.h>
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) {}
RandomVector(const RandomVector&) = delete;
RandomVector& operator=(const RandomVector&) = delete;
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_;
};
} // namespace webrtc
#endif // MODULES_AUDIO_CODING_NETEQ_RANDOM_VECTOR_H_
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