36e1ad9b5d
According to project structure discussed with Andrew. We want to flatten out the hierarchy and minimize the number of GYP files. No changes at all are being made in the source files; they are just moved. The only modified files are the GYP file and Android.mk Kevin: I updated relative paths in Android.mk so please verify it is correct, since I don't know how to build that. Review URL: http://webrtc-codereview.appspot.com/256006 git-svn-id: http://webrtc.googlecode.com/svn/trunk@894 4adac7df-926f-26a2-2b94-8c16560cd09d
80 lines
3.1 KiB
C
80 lines
3.1 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_CbMemEnergy.c
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******************************************************************/
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#include "defines.h"
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#include "constants.h"
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#include "cb_mem_energy_calc.h"
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/*----------------------------------------------------------------*
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* Function WebRtcIlbcfix_CbMemEnergy computes the energy of all
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* the vectors in the codebook memory that will be used in the
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* following search for the best match.
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*----------------------------------------------------------------*/
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void WebRtcIlbcfix_CbMemEnergy(
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WebRtc_Word16 range,
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WebRtc_Word16 *CB, /* (i) The CB memory (1:st section) */
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WebRtc_Word16 *filteredCB, /* (i) The filtered CB memory (2:nd section) */
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WebRtc_Word16 lMem, /* (i) Length of the CB memory */
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WebRtc_Word16 lTarget, /* (i) Length of the target vector */
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WebRtc_Word16 *energyW16, /* (o) Energy in the CB vectors */
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WebRtc_Word16 *energyShifts, /* (o) Shift value of the energy */
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WebRtc_Word16 scale, /* (i) The scaling of all energy values */
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WebRtc_Word16 base_size /* (i) Index to where the energy values should be stored */
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) {
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WebRtc_Word16 *ppi, *ppo, *pp;
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WebRtc_Word32 energy, tmp32;
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/* Compute the energy and store it in a vector. Also the
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* corresponding shift values are stored. The energy values
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* are reused in all three stages. */
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/* Calculate the energy in the first block of 'lTarget' sampels. */
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ppi = CB+lMem-lTarget-1;
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ppo = CB+lMem-1;
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pp=CB+lMem-lTarget;
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energy = WebRtcSpl_DotProductWithScale( pp, pp, lTarget, scale);
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/* Normalize the energy and store the number of shifts */
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energyShifts[0] = (WebRtc_Word16)WebRtcSpl_NormW32(energy);
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tmp32 = WEBRTC_SPL_LSHIFT_W32(energy, energyShifts[0]);
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energyW16[0] = (WebRtc_Word16)WEBRTC_SPL_RSHIFT_W32(tmp32, 16);
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/* Compute the energy of the rest of the cb memory
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* by step wise adding and subtracting the next
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* sample and the last sample respectively. */
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WebRtcIlbcfix_CbMemEnergyCalc(energy, range, ppi, ppo, energyW16, energyShifts, scale, 0);
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/* Next, precompute the energy values for the filtered cb section */
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energy=0;
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pp=filteredCB+lMem-lTarget;
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energy = WebRtcSpl_DotProductWithScale( pp, pp, lTarget, scale);
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/* Normalize the energy and store the number of shifts */
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energyShifts[base_size] = (WebRtc_Word16)WebRtcSpl_NormW32(energy);
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tmp32 = WEBRTC_SPL_LSHIFT_W32(energy, energyShifts[base_size]);
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energyW16[base_size] = (WebRtc_Word16)WEBRTC_SPL_RSHIFT_W32(tmp32, 16);
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ppi = filteredCB + lMem - 1 - lTarget;
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ppo = filteredCB + lMem - 1;
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WebRtcIlbcfix_CbMemEnergyCalc(energy, range, ppi, ppo, energyW16, energyShifts, scale, base_size);
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}
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