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06c2aa9f7b
WebRTC internal code should always use include paths that start from the root of the project and that clearly identify the header file. This allows 'gn check' to actually keep dependencies under control because 'gn check' cannot enforce anything if the include path is not fully qualified (starting from the root of the project). Bug: webrtc:8815 Change-Id: I36f01784fa5f5b77eefc02db479b1f7f6ee1a8c3 Reviewed-on: https://webrtc-review.googlesource.com/46263 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21871}
79 lines
3.1 KiB
C
79 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 "modules/audio_coding/codecs/ilbc/defines.h"
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#include "modules/audio_coding/codecs/ilbc/constants.h"
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#include "modules/audio_coding/codecs/ilbc/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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size_t range,
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int16_t *CB, /* (i) The CB memory (1:st section) */
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int16_t *filteredCB, /* (i) The filtered CB memory (2:nd section) */
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size_t lMem, /* (i) Length of the CB memory */
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size_t lTarget, /* (i) Length of the target vector */
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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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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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) {
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int16_t *ppi, *ppo, *pp;
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int32_t 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] = (int16_t)WebRtcSpl_NormW32(energy);
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tmp32 = energy << energyShifts[0];
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energyW16[0] = (int16_t)(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] = (int16_t)WebRtcSpl_NormW32(energy);
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tmp32 = energy << energyShifts[base_size];
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energyW16[base_size] = (int16_t)(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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