chromium/third_party/webrtc/common_audio/signal_processing/randomization_functions.c

/*
 *  Copyright (c) 2011 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.
 */


/*
 * This file contains implementations of the randomization functions
 * WebRtcSpl_RandU()
 * WebRtcSpl_RandN()
 * WebRtcSpl_RandUArray()
 *
 * The description header can be found in signal_processing_library.h
 *
 */

#include "common_audio/signal_processing/include/signal_processing_library.h"

static const uint32_t kMaxSeedUsed = …;

static const int16_t kRandNTable[] = …;

static uint32_t IncreaseSeed(uint32_t* seed) { … }

int16_t WebRtcSpl_RandU(uint32_t* seed) { … }

int16_t WebRtcSpl_RandN(uint32_t* seed) { … }

// Creates an array of uniformly distributed variables.
int16_t WebRtcSpl_RandUArray(int16_t* vector,
                             int16_t vector_length,
                             uint32_t* seed) { … }