| /* |
| * 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 "signal_processing_library.h" |
| |
| WebRtc_Word32 WebRtcSpl_Energy(WebRtc_Word16* vector, int vector_length, int* scale_factor) |
| { |
| WebRtc_Word32 en = 0; |
| int i; |
| int scaling = WebRtcSpl_GetScalingSquare(vector, vector_length, vector_length); |
| int looptimes = vector_length; |
| WebRtc_Word16 *vectorptr = vector; |
| |
| for (i = 0; i < looptimes; i++) |
| { |
| en += WEBRTC_SPL_MUL_16_16_RSFT(*vectorptr, *vectorptr, scaling); |
| vectorptr++; |
| } |
| *scale_factor = scaling; |
| |
| return en; |
| } |