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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/* encode.c - Encoding function for the iSAC coder */
#include <math.h>
#include "modules/audio_coding/codecs/isac/main/source/structs.h"
#include "modules/audio_coding/codecs/isac/main/source/codec.h"
#include "modules/audio_coding/codecs/isac/main/source/pitch_estimator.h"
void WebRtcIsac_InitMasking(MaskFiltstr *maskdata) {
int k;
for (k = 0; k < WINLEN; k++) {
maskdata->DataBufferLo[k] = 0.0;
maskdata->DataBufferHi[k] = 0.0;
}
for (k = 0; k < ORDERLO+1; k++) {
maskdata->CorrBufLo[k] = 0.0;
maskdata->PreStateLoF[k] = 0.0;
maskdata->PreStateLoG[k] = 0.0;
maskdata->PostStateLoF[k] = 0.0;
maskdata->PostStateLoG[k] = 0.0;
}
for (k = 0; k < ORDERHI+1; k++) {
maskdata->CorrBufHi[k] = 0.0;
maskdata->PreStateHiF[k] = 0.0;
maskdata->PreStateHiG[k] = 0.0;
maskdata->PostStateHiF[k] = 0.0;
maskdata->PostStateHiG[k] = 0.0;
}
maskdata->OldEnergy = 10.0;
return;
}
void WebRtcIsac_InitPostFilterbank(PostFiltBankstr *postfiltdata)
{
int k;
for (k = 0; k < 2*POSTQORDER; k++) {
postfiltdata->STATE_0_LOWER[k] = 0;
postfiltdata->STATE_0_UPPER[k] = 0;
postfiltdata->STATE_0_LOWER_float[k] = 0;
postfiltdata->STATE_0_UPPER_float[k] = 0;
}
/* High pass filter states */
postfiltdata->HPstates1[0] = 0.0;
postfiltdata->HPstates1[1] = 0.0;
postfiltdata->HPstates2[0] = 0.0;
postfiltdata->HPstates2[1] = 0.0;
postfiltdata->HPstates1_float[0] = 0.0f;
postfiltdata->HPstates1_float[1] = 0.0f;
postfiltdata->HPstates2_float[0] = 0.0f;
postfiltdata->HPstates2_float[1] = 0.0f;
return;
}
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