14b43beb7c
TBR=niklas.enbom@webrtc.org Review URL: https://webrtc-codereview.appspot.com/915006 git-svn-id: http://webrtc.googlecode.com/svn/trunk@2963 4adac7df-926f-26a2-2b94-8c16560cd09d
102 lines
3.5 KiB
C
102 lines
3.5 KiB
C
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/*
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* This file contains implementations of the iLBC specific functions
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* WebRtcSpl_ReverseOrderMultArrayElements()
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* WebRtcSpl_ElementwiseVectorMult()
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* WebRtcSpl_AddVectorsAndShift()
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* WebRtcSpl_AddAffineVectorToVector()
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* WebRtcSpl_AffineTransformVector()
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*
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*/
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#include "signal_processing_library.h"
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void WebRtcSpl_ReverseOrderMultArrayElements(WebRtc_Word16 *out, G_CONST WebRtc_Word16 *in,
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G_CONST WebRtc_Word16 *win,
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WebRtc_Word16 vector_length,
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WebRtc_Word16 right_shifts)
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{
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int i;
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WebRtc_Word16 *outptr = out;
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G_CONST WebRtc_Word16 *inptr = in;
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G_CONST WebRtc_Word16 *winptr = win;
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for (i = 0; i < vector_length; i++)
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{
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(*outptr++) = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(*inptr++,
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*winptr--, right_shifts);
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}
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}
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void WebRtcSpl_ElementwiseVectorMult(WebRtc_Word16 *out, G_CONST WebRtc_Word16 *in,
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G_CONST WebRtc_Word16 *win, WebRtc_Word16 vector_length,
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WebRtc_Word16 right_shifts)
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{
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int i;
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WebRtc_Word16 *outptr = out;
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G_CONST WebRtc_Word16 *inptr = in;
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G_CONST WebRtc_Word16 *winptr = win;
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for (i = 0; i < vector_length; i++)
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{
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(*outptr++) = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(*inptr++,
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*winptr++, right_shifts);
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}
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}
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void WebRtcSpl_AddVectorsAndShift(WebRtc_Word16 *out, G_CONST WebRtc_Word16 *in1,
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G_CONST WebRtc_Word16 *in2, WebRtc_Word16 vector_length,
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WebRtc_Word16 right_shifts)
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{
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int i;
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WebRtc_Word16 *outptr = out;
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G_CONST WebRtc_Word16 *in1ptr = in1;
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G_CONST WebRtc_Word16 *in2ptr = in2;
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for (i = vector_length; i > 0; i--)
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{
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(*outptr++) = (WebRtc_Word16)(((*in1ptr++) + (*in2ptr++)) >> right_shifts);
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}
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}
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void WebRtcSpl_AddAffineVectorToVector(WebRtc_Word16 *out, WebRtc_Word16 *in,
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WebRtc_Word16 gain, WebRtc_Word32 add_constant,
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WebRtc_Word16 right_shifts, int vector_length)
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{
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WebRtc_Word16 *inPtr;
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WebRtc_Word16 *outPtr;
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int i;
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inPtr = in;
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outPtr = out;
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for (i = 0; i < vector_length; i++)
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{
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(*outPtr++) += (WebRtc_Word16)((WEBRTC_SPL_MUL_16_16((*inPtr++), gain)
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+ (WebRtc_Word32)add_constant) >> right_shifts);
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}
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}
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void WebRtcSpl_AffineTransformVector(WebRtc_Word16 *out, WebRtc_Word16 *in,
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WebRtc_Word16 gain, WebRtc_Word32 add_constant,
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WebRtc_Word16 right_shifts, int vector_length)
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{
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WebRtc_Word16 *inPtr;
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WebRtc_Word16 *outPtr;
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int i;
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inPtr = in;
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outPtr = out;
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for (i = 0; i < vector_length; i++)
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{
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(*outPtr++) = (WebRtc_Word16)((WEBRTC_SPL_MUL_16_16((*inPtr++), gain)
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+ (WebRtc_Word32)add_constant) >> right_shifts);
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}
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}
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