1e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent/* 2e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * 4e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * Use of this source code is governed by a BSD-style license 5e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * that can be found in the LICENSE file in the root of the source 6e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * tree. An additional intellectual property rights grant can be found 7e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * in the file PATENTS. All contributing project authors may 8e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * be found in the AUTHORS file in the root of the source tree. 9e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent */ 10e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 11e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 12e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent/* 13e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * This file contains the function WebRtcSpl_Energy(). 14e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * The description header can be found in signal_processing_library.h 15e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * 16e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent */ 17e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 18e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent#include "signal_processing_library.h" 19e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 20e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric LaurentWebRtc_Word32 WebRtcSpl_Energy(WebRtc_Word16* vector, int vector_length, int* scale_factor) 21e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent{ 22e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtc_Word32 en = 0; 23e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent int i; 24e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent int scaling = WebRtcSpl_GetScalingSquare(vector, vector_length, vector_length); 25e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent int looptimes = vector_length; 26e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtc_Word16 *vectorptr = vector; 27e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 28e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent for (i = 0; i < looptimes; i++) 29e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent { 30e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent en += WEBRTC_SPL_MUL_16_16_RSFT(*vectorptr, *vectorptr, scaling); 31e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent vectorptr++; 32e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent } 33e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent *scale_factor = scaling; 34e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 35e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent return en; 36e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent} 37