189 lines
5.2 KiB
C
189 lines
5.2 KiB
C
/*
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** Copyright 2003-2010, VisualOn, Inc.
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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/*******************************************************************************
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File: grp_data.c
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Content: Short block grouping function
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*******************************************************************************/
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#include "basic_op.h"
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#include "psy_const.h"
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#include "interface.h"
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#include "grp_data.h"
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/*****************************************************************************
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*
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* function name: groupShortData
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* description: group short data for next quantization and coding
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*
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**********************************************************************************/
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void
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groupShortData(Word32 *mdctSpectrum,
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Word32 *tmpSpectrum,
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SFB_THRESHOLD *sfbThreshold,
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SFB_ENERGY *sfbEnergy,
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SFB_ENERGY *sfbEnergyMS,
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SFB_ENERGY *sfbSpreadedEnergy,
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const Word16 sfbCnt,
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const Word16 *sfbOffset,
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const Word16 *sfbMinSnr,
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Word16 *groupedSfbOffset,
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Word16 *maxSfbPerGroup,
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Word16 *groupedSfbMinSnr,
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const Word16 noOfGroups,
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const Word16 *groupLen)
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{
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Word32 i, j;
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Word32 line;
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Word32 sfb;
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Word32 grp;
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Word32 wnd;
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Word32 offset;
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Word32 highestSfb;
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/* for short: regroup and */
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/* cumulate energies und thresholds group-wise . */
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/* calculate sfbCnt */
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highestSfb = 0;
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for (wnd=0; wnd<TRANS_FAC; wnd++) {
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for (sfb=sfbCnt - 1; sfb>=highestSfb; sfb--) {
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for (line=(sfbOffset[sfb + 1] - 1); line>=sfbOffset[sfb]; line--) {
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if (mdctSpectrum[wnd*FRAME_LEN_SHORT+line] != 0) break;
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}
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if (line >= sfbOffset[sfb]) break;
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}
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highestSfb = max(highestSfb, sfb);
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}
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if (highestSfb < 0) {
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highestSfb = 0;
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}
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*maxSfbPerGroup = highestSfb + 1;
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/* calculate sfbOffset */
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i = 0;
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offset = 0;
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for (grp = 0; grp < noOfGroups; grp++) {
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for (sfb = 0; sfb < sfbCnt; sfb++) {
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groupedSfbOffset[i] = offset + sfbOffset[sfb] * groupLen[grp];
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i += 1;
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}
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offset += groupLen[grp] * FRAME_LEN_SHORT;
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}
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groupedSfbOffset[i] = FRAME_LEN_LONG;
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i += 1;
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/* calculate minSnr */
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i = 0;
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offset = 0;
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for (grp = 0; grp < noOfGroups; grp++) {
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for (sfb = 0; sfb < sfbCnt; sfb++) {
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groupedSfbMinSnr[i] = sfbMinSnr[sfb];
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i += 1;
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}
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offset += groupLen[grp] * FRAME_LEN_SHORT;
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}
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/* sum up sfbThresholds */
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wnd = 0;
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i = 0;
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for (grp = 0; grp < noOfGroups; grp++) {
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for (sfb = 0; sfb < sfbCnt; sfb++) {
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Word32 thresh = sfbThreshold->sfbShort[wnd][sfb];
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for (j=1; j<groupLen[grp]; j++) {
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thresh = L_add(thresh, sfbThreshold->sfbShort[wnd+j][sfb]);
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}
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sfbThreshold->sfbLong[i] = thresh;
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i += 1;
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}
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wnd += groupLen[grp];
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}
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/* sum up sfbEnergies left/right */
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wnd = 0;
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i = 0;
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for (grp = 0; grp < noOfGroups; grp++) {
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for (sfb = 0; sfb < sfbCnt; sfb++) {
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Word32 energy = sfbEnergy->sfbShort[wnd][sfb];
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for (j=1; j<groupLen[grp]; j++) {
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energy = L_add(energy, sfbEnergy->sfbShort[wnd+j][sfb]);
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}
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sfbEnergy->sfbLong[i] = energy;
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i += 1;
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}
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wnd += groupLen[grp];
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}
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/* sum up sfbEnergies mid/side */
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wnd = 0;
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i = 0;
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for (grp = 0; grp < noOfGroups; grp++) {
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for (sfb = 0; sfb < sfbCnt; sfb++) {
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Word32 energy = sfbEnergyMS->sfbShort[wnd][sfb];
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for (j=1; j<groupLen[grp]; j++) {
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energy = L_add(energy, sfbEnergyMS->sfbShort[wnd+j][sfb]);
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}
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sfbEnergyMS->sfbLong[i] = energy;
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i += 1;
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}
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wnd += groupLen[grp];
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}
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/* sum up sfbSpreadedEnergies */
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wnd = 0;
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i = 0;
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for (grp = 0; grp < noOfGroups; grp++) {
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for (sfb = 0; sfb < sfbCnt; sfb++) {
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Word32 energy = sfbSpreadedEnergy->sfbShort[wnd][sfb];
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for (j=1; j<groupLen[grp]; j++) {
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energy = L_add(energy, sfbSpreadedEnergy->sfbShort[wnd+j][sfb]);
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}
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sfbSpreadedEnergy->sfbLong[i] = energy;
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i += 1;
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}
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wnd += groupLen[grp];
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}
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/* re-group spectrum */
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wnd = 0;
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i = 0;
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for (grp = 0; grp < noOfGroups; grp++) {
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for (sfb = 0; sfb < sfbCnt; sfb++) {
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for (j = 0; j < groupLen[grp]; j++) {
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Word16 lineOffset = FRAME_LEN_SHORT * (wnd + j);
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for (line = lineOffset + sfbOffset[sfb]; line < lineOffset + sfbOffset[sfb+1]; line++) {
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tmpSpectrum[i] = mdctSpectrum[line];
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i = i + 1;
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}
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}
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}
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wnd += groupLen[grp];
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}
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for(i=0;i<FRAME_LEN_LONG;i+=4) {
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mdctSpectrum[i] = tmpSpectrum[i];
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mdctSpectrum[i+1] = tmpSpectrum[i+1];
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mdctSpectrum[i+2] = tmpSpectrum[i+2];
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mdctSpectrum[i+3] = tmpSpectrum[i+3];
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}
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}
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