File: energy.c

package info (click to toggle)
thunderbird 1%3A140.5.0esr-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 4,609,032 kB
  • sloc: cpp: 7,672,739; javascript: 5,901,898; ansic: 3,898,899; python: 1,413,347; xml: 653,997; asm: 462,284; java: 180,927; sh: 113,491; makefile: 20,460; perl: 14,288; objc: 13,059; yacc: 4,583; pascal: 3,352; lex: 1,720; ruby: 1,222; exp: 762; sql: 715; awk: 580; php: 436; lisp: 430; sed: 70; csh: 10
file content (36 lines) | stat: -rw-r--r-- 1,098 bytes parent folder | download | duplicates (22) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
 
/*
 *  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 the function WebRtcSpl_Energy().
 * The description header can be found in signal_processing_library.h
 *
 */

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

int32_t WebRtcSpl_Energy(int16_t* vector,
                         size_t vector_length,
                         int* scale_factor) {
  int32_t en = 0;
  size_t i;
  int scaling =
      WebRtcSpl_GetScalingSquare(vector, vector_length, vector_length);
  size_t looptimes = vector_length;
  int16_t* vectorptr = vector;

  for (i = 0; i < looptimes; i++) {
    en += (*vectorptr * *vectorptr) >> scaling;
    vectorptr++;
  }
  *scale_factor = scaling;

  return en;
}