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/******************************** MPEG Audio Encoder **************************
(C) Copyright Fraunhofer IIS (2001)
All Rights Reserved
Please be advised that this software and/or program delivery is
Confidential Information of Fraunhofer and subject to and covered by the
Fraunhofer IIS Software Evaluation Agreement
between Google Inc. and Fraunhofer
effective and in full force since March 1, 2012.
You may use this software and/or program only under the terms and
conditions described in the above mentioned Fraunhofer IIS Software
Evaluation Agreement. Any other and/or further use requires a separate agreement.
This software and/or program is protected by copyright law and international
treaties. Any reproduction or distribution of this software and/or program,
or any portion of it, may result in severe civil and criminal penalties, and
will be prosecuted to the maximum extent possible under law.
$Id$
Initial author: M.Lohwasser
contents/description: PNS parameters depending on bitrate and bandwidth
******************************************************************************/
#include "pnsparam.h"
#include "psy_configuration.h"
typedef struct {
SHORT startFreq;
/* Parameters for detection */
FIXP_SGL refPower;
FIXP_SGL refTonality;
SHORT tnsGainThreshold; /* scaled by TNS_PREDGAIN_SCALE (=1000) */
SHORT tnsPNSGainThreshold; /* scaled by TNS_PREDGAIN_SCALE (=1000) */
FIXP_SGL gapFillThr;
SHORT minSfbWidth;
USHORT detectionAlgorithmFlags;
} PNS_INFO_TAB;
typedef struct {
ULONG brFrom;
ULONG brTo;
UCHAR S22050;
UCHAR S24000;
UCHAR S32000;
UCHAR S44100;
UCHAR S48000;
} AUTO_PNS_TAB;
static const AUTO_PNS_TAB levelTable_mono[]= {
{0, 11999, 1, 1, 1, 1, 1,},
{12000, 19999, 1, 1, 1, 1, 1,},
{20000, 28999, 2, 1, 1, 1, 1,},
{29000, 40999, 4, 4, 4, 2, 2,},
{41000, 55999, 9, 9, 7, 7, 7,},
{56000, 79999, 0, 0, 0, 9, 9,},
{80000, 99999, 0, 0, 0, 0, 0,},
{100000,999999, 0, 0, 0, 0, 0,},
};
static const AUTO_PNS_TAB levelTable_stereo[]= {
{0, 11999, 1, 1, 1, 1, 1,},
{12000, 19999, 3, 1, 1, 1, 1,},
{20000, 28999, 3, 3, 3, 2, 2,},
{29000, 40999, 7, 6, 6, 5, 5,},
{41000, 55999, 9, 9, 7, 7, 7,},
{56000, 79999, 0, 0, 0, 0, 0,},
{80000, 99999, 0, 0, 0, 0, 0,},
{100000,999999, 0, 0, 0, 0, 0,},
};
static const PNS_INFO_TAB pnsInfoTab[] = {
/*0 pns off */
/*1*/ { 4000, FL2FXCONST_SGL(0.04), FL2FXCONST_SGL(0.06), 1150, 1200, FL2FXCONST_SGL(0.02), 8,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS /*| JUST_LONG_WINDOW*/ },
/*2*/ { 4000, FL2FXCONST_SGL(0.04), FL2FXCONST_SGL(0.07), 1130, 1300, FL2FXCONST_SGL(0.05), 8,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS /*| JUST_LONG_WINDOW*/ },
/*3*/ { 4100, FL2FXCONST_SGL(0.04), FL2FXCONST_SGL(0.07), 1100, 1400, FL2FXCONST_SGL(0.10), 8,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS /*| JUST_LONG_WINDOW*/ },
/*4*/ { 4100, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.10), 1100, 1400, FL2FXCONST_SGL(0.15), 8,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS /*| JUST_LONG_WINDOW*/ },
/*5*/ { 4300, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.10), 1100, 1400, FL2FXCONST_SGL(0.15), 8,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS | JUST_LONG_WINDOW },
/*6*/ { 5000, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.10), 1100, 1400, FL2FXCONST_SGL(0.25), 8,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS | JUST_LONG_WINDOW },
/*7*/ { 5500, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.12), 1100, 1400, FL2FXCONST_SGL(0.35), 8,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS | JUST_LONG_WINDOW },
/*8*/ { 6000, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.12), 1080, 1400, FL2FXCONST_SGL(0.40), 8,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS | JUST_LONG_WINDOW },
/*9*/ { 6000, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.14), 1070, 1400, FL2FXCONST_SGL(0.45), 8,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS | JUST_LONG_WINDOW },
};
static const AUTO_PNS_TAB levelTable_lowComplexity[]= {
//{0, 23999, 1, 1, 1, 1, 1,},
//{24000, 31999, 2, 2, 2, 2, 2,},
{0, 27999, 0, 0, 0, 0, 0,},
{28000, 31999, 2, 2, 2, 2, 2,},
{32000, 47999, 3, 3, 3, 3, 3,},
{48000, 48000, 4, 4, 4, 4, 4,},
{48001, 999999, 0, 0, 0, 0, 0,},
};
/* conversion of old LC tuning tables to new (LD enc) structure (only entries which are actually used were converted) */
static const PNS_INFO_TAB pnsInfoTab_lowComplexity[] = {
/*0 pns off */
/* DEFAULT parameter set */
/*1*/ { 4100, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.16), 1100, 1400, FL2FXCONST_SGL(0.5), 16,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS | JUST_LONG_WINDOW },
/*2*/ { 4100, FL2FXCONST_SGL(0.05), FL2FXCONST_SGL(0.10), 1410, 1400, FL2FXCONST_SGL(0.5), 16,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS | JUST_LONG_WINDOW },
/*3*/ { 4100, FL2FXCONST_SGL(0.05), FL2FXCONST_SGL(0.10), 1100, 1400, FL2FXCONST_SGL(0.5), 16,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS | JUST_LONG_WINDOW },
/* LOWSUBST -> PNS is used less often than with DEFAULT parameter set (for br: 48000 - 79999) */
/*4*/ { 4100, FL2FXCONST_SGL(0.20), FL2FXCONST_SGL(0.10), 1410, 1400, FL2FXCONST_SGL(0.5), 16,
USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | USE_TNS_PNS | JUST_LONG_WINDOW },
};
/****************************************************************************
function to look up used pns level
****************************************************************************/
int FDKaacEnc_lookUpPnsUse (int bitRate, int sampleRate, int numChan, const int isLC) {
int hUsePns=0, size, i;
const AUTO_PNS_TAB *levelTable;
if (isLC) {
levelTable = &levelTable_lowComplexity[0];
size = sizeof(levelTable_lowComplexity);
} else
{ /* (E)LD */
levelTable = (numChan > 1) ? &levelTable_stereo[0] : &levelTable_mono[0];
size = (numChan > 1) ? sizeof(levelTable_stereo) : sizeof(levelTable_mono);
}
for(i = 0; i < (int) (size/sizeof(AUTO_PNS_TAB)); i++) {
if(((ULONG)bitRate >= levelTable[i].brFrom) &&
((ULONG)bitRate <= levelTable[i].brTo) )
break;
}
/* sanity check */
if ((int)(sizeof(pnsInfoTab)/sizeof(PNS_INFO_TAB)) < i ) {
return (PNS_TABLE_ERROR);
}
switch (sampleRate) {
case 22050: hUsePns = levelTable[i].S22050; break;
case 24000: hUsePns = levelTable[i].S24000; break;
case 32000: hUsePns = levelTable[i].S32000; break;
case 44100: hUsePns = levelTable[i].S44100; break;
case 48000: hUsePns = levelTable[i].S48000; break;
default:
if (isLC) {
hUsePns = levelTable[i].S48000;
}
break;
}
return (hUsePns);
}
/*****************************************************************************
functionname: FDKaacEnc_GetPnsParam
description: Gets PNS parameters depending on bitrate and bandwidth
returns: error status
input: Noiseparams struct, bitrate, sampling rate,
number of sfb's, pointer to sfb offset
output: PNS parameters
*****************************************************************************/
AAC_ENCODER_ERROR FDKaacEnc_GetPnsParam(NOISEPARAMS *np,
INT bitRate,
INT sampleRate,
INT sfbCnt,
const INT *sfbOffset,
INT *usePns,
INT numChan,
const int isLC)
{
int i, hUsePns;
const PNS_INFO_TAB *pnsInfo;
if (isLC) {
np->detectionAlgorithmFlags = IS_LOW_COMLEXITY;
pnsInfo = pnsInfoTab_lowComplexity;
}
else
{
np->detectionAlgorithmFlags = 0;
pnsInfo = pnsInfoTab;
}
if (*usePns<=0)
return AAC_ENC_OK;
/* new pns params */
hUsePns = FDKaacEnc_lookUpPnsUse (bitRate, sampleRate, numChan, isLC);
if (hUsePns == 0) {
*usePns = 0;
return AAC_ENC_OK;
}
if (hUsePns == PNS_TABLE_ERROR)
return AAC_ENC_PNS_TABLE_ERROR;
/* select correct row of tuning table */
pnsInfo += hUsePns-1;
np->startSfb = FDKaacEnc_FreqToBandWithRounding( pnsInfo->startFreq,
sampleRate,
sfbCnt,
sfbOffset );
np->detectionAlgorithmFlags |= pnsInfo->detectionAlgorithmFlags;
np->refPower = FX_SGL2FX_DBL(pnsInfo->refPower);
np->refTonality = FX_SGL2FX_DBL(pnsInfo->refTonality);
np->tnsGainThreshold = pnsInfo->tnsGainThreshold;
np->tnsPNSGainThreshold = pnsInfo->tnsPNSGainThreshold;
np->minSfbWidth = pnsInfo->minSfbWidth;
np->gapFillThr = (FIXP_SGL)pnsInfo->gapFillThr;
/* assuming a constant dB/Hz slope in the signal's PSD curve,
the detection threshold needs to be corrected for the width of the band */
for ( i = 0; i < (sfbCnt-1); i++)
{
INT qtmp, sfbWidth;
FIXP_DBL tmp;
sfbWidth = sfbOffset[i+1]-sfbOffset[i];
tmp = fPow(np->refPower, 0, sfbWidth, DFRACT_BITS-1-5, &qtmp);
np->powDistPSDcurve[i] = (FIXP_SGL)((LONG)(scaleValue(tmp, qtmp) >> 16));
}
np->powDistPSDcurve[sfbCnt] = np->powDistPSDcurve[sfbCnt-1];
return AAC_ENC_OK;
}
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