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bb547203bf
In order to eliminate the WebRTC Subtree mirror in Chromium, WebRTC is moving the content of the src/webrtc directory up to the src/ directory. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38 Reviewed-on: https://webrtc-review.googlesource.com/1560 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19845}
67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
/*
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* Copyright (c) 2011 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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iLBC Speech Coder ANSI-C Source Code
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WebRtcIlbcfix_CbMemEnergyAugmentation.c
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******************************************************************/
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#include "defines.h"
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#include "constants.h"
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void WebRtcIlbcfix_CbMemEnergyAugmentation(
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int16_t *interpSamples, /* (i) The interpolated samples */
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int16_t *CBmem, /* (i) The CB memory */
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int scale, /* (i) The scaling of all energy values */
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size_t base_size, /* (i) Index to where energy values should be stored */
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int16_t *energyW16, /* (o) Energy in the CB vectors */
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int16_t *energyShifts /* (o) Shift value of the energy */
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){
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int32_t energy, tmp32;
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int16_t *ppe, *pp, *interpSamplesPtr;
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int16_t *CBmemPtr;
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size_t lagcount;
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int16_t *enPtr=&energyW16[base_size-20];
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int16_t *enShPtr=&energyShifts[base_size-20];
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int32_t nrjRecursive;
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CBmemPtr = CBmem+147;
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interpSamplesPtr = interpSamples;
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/* Compute the energy for the first (low-5) noninterpolated samples */
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nrjRecursive = WebRtcSpl_DotProductWithScale( CBmemPtr-19, CBmemPtr-19, 15, scale);
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ppe = CBmemPtr - 20;
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for (lagcount=20; lagcount<=39; lagcount++) {
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/* Update the energy recursively to save complexity */
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nrjRecursive += (*ppe * *ppe) >> scale;
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ppe--;
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energy = nrjRecursive;
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/* interpolation */
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energy += WebRtcSpl_DotProductWithScale(interpSamplesPtr, interpSamplesPtr, 4, scale);
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interpSamplesPtr += 4;
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/* Compute energy for the remaining samples */
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pp = CBmemPtr - lagcount;
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energy += WebRtcSpl_DotProductWithScale(pp, pp, SUBL-lagcount, scale);
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/* Normalize the energy and store the number of shifts */
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(*enShPtr) = (int16_t)WebRtcSpl_NormW32(energy);
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tmp32 = energy << *enShPtr;
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*enPtr = (int16_t)(tmp32 >> 16);
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enShPtr++;
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enPtr++;
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}
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}
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