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Diffstat (limited to 'third_party/libwebrtc/modules/audio_coding/neteq/random_vector.h')
-rw-r--r-- | third_party/libwebrtc/modules/audio_coding/neteq/random_vector.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_coding/neteq/random_vector.h b/third_party/libwebrtc/modules/audio_coding/neteq/random_vector.h new file mode 100644 index 0000000000..4a782f1116 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/neteq/random_vector.h @@ -0,0 +1,46 @@ +/* + * 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_ |