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51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
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/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ_RANDOM_VECTOR_H_
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#define WEBRTC_MODULES_AUDIO_CODING_NETEQ_RANDOM_VECTOR_H_
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#include <string.h> // size_t
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#include "webrtc/base/constructormagic.h"
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#include "webrtc/typedefs.h"
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namespace webrtc {
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// This class generates pseudo-random samples.
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class RandomVector {
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public:
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static const int kRandomTableSize = 256;
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static const int16_t kRandomTable[kRandomTableSize];
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RandomVector()
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: seed_(777),
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seed_increment_(1) {
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}
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void Reset();
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void Generate(size_t length, int16_t* output);
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void IncreaseSeedIncrement(int16_t increase_by);
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// Accessors and mutators.
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int16_t seed_increment() { return seed_increment_; }
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void set_seed_increment(int16_t value) { seed_increment_ = value; }
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private:
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uint32_t seed_;
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int16_t seed_increment_;
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DISALLOW_COPY_AND_ASSIGN(RandomVector);
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ_RANDOM_VECTOR_H_
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