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

/*
 *  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.
 */

/*
 * This file contains the implementation of functions
 * WebRtcSpl_MaxAbsValueW16C()
 * WebRtcSpl_MaxAbsValueW32C()
 * WebRtcSpl_MaxValueW16C()
 * WebRtcSpl_MaxValueW32C()
 * WebRtcSpl_MinValueW16C()
 * WebRtcSpl_MinValueW32C()
 * WebRtcSpl_MaxAbsIndexW16()
 * WebRtcSpl_MaxIndexW16()
 * WebRtcSpl_MaxIndexW32()
 * WebRtcSpl_MinIndexW16()
 * WebRtcSpl_MinIndexW32()
 *
 */

#include <stdlib.h>
#include <limits.h>

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

// TODO(bjorn/kma): Consolidate function pairs (e.g. combine
//   WebRtcSpl_MaxAbsValueW16C and WebRtcSpl_MaxAbsIndexW16 into a single one.)
// TODO(kma): Move the next six functions into min_max_operations_c.c.

// Maximum absolute value of word16 vector. C version for generic platforms.
int16_t WebRtcSpl_MaxAbsValueW16C(const int16_t* vector, size_t length) { … }

// Maximum absolute value of word32 vector. C version for generic platforms.
int32_t WebRtcSpl_MaxAbsValueW32C(const int32_t* vector, size_t length) { … }

// Maximum value of word16 vector. C version for generic platforms.
int16_t WebRtcSpl_MaxValueW16C(const int16_t* vector, size_t length) { … }

// Maximum value of word32 vector. C version for generic platforms.
int32_t WebRtcSpl_MaxValueW32C(const int32_t* vector, size_t length) { … }

// Minimum value of word16 vector. C version for generic platforms.
int16_t WebRtcSpl_MinValueW16C(const int16_t* vector, size_t length) { … }

// Minimum value of word32 vector. C version for generic platforms.
int32_t WebRtcSpl_MinValueW32C(const int32_t* vector, size_t length) { … }

// Index of maximum absolute value in a word16 vector.
size_t WebRtcSpl_MaxAbsIndexW16(const int16_t* vector, size_t length) { … }

int16_t WebRtcSpl_MaxAbsElementW16(const int16_t* vector, size_t length) { … }

// Index of maximum value in a word16 vector.
size_t WebRtcSpl_MaxIndexW16(const int16_t* vector, size_t length) { … }

// Index of maximum value in a word32 vector.
size_t WebRtcSpl_MaxIndexW32(const int32_t* vector, size_t length) { … }

// Index of minimum value in a word16 vector.
size_t WebRtcSpl_MinIndexW16(const int16_t* vector, size_t length) { … }

// Index of minimum value in a word32 vector.
size_t WebRtcSpl_MinIndexW32(const int32_t* vector, size_t length) { … }

// Finds both the minimum and maximum elements in an array of 16-bit integers.
void WebRtcSpl_MinMaxW16(const int16_t* vector, size_t length,
                         int16_t* min_val, int16_t* max_val) { … }