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-rw-r--r--media/libstagefright/codecs/aacenc/src/psy_configuration.c104
1 files changed, 52 insertions, 52 deletions
diff --git a/media/libstagefright/codecs/aacenc/src/psy_configuration.c b/media/libstagefright/codecs/aacenc/src/psy_configuration.c
index 8e599b0..02d92ab 100644
--- a/media/libstagefright/codecs/aacenc/src/psy_configuration.c
+++ b/media/libstagefright/codecs/aacenc/src/psy_configuration.c
@@ -88,17 +88,17 @@ Word32 GetSRIndex(Word32 sampleRate)
*
* function name: atan_1000
* description: calculates 1000*atan(x/1000)
-* based on atan approx for x > 0
+* based on atan approx for x > 0
* atan(x) = x/((float)1.0f+(float)0.280872f*x*x) if x < 1
* = pi/2 - x/((float)0.280872f +x*x) if x >= 1
* return: 1000*atan(x/1000)
*
**********************************************************************************/
-static Word16 atan_1000(Word32 val)
+static Word16 atan_1000(Word32 val)
{
Word32 y;
-
+
if(L_sub(val, 1000) < 0) {
y = extract_l(((1000 * val) / (1000 + ((val * val) / ATAN_COEF1))));
}
@@ -126,9 +126,9 @@ static Word16 BarcLineValue(Word16 noOfLines, Word16 fftLine, Word32 samplingFre
/* center frequency of fft line */
center_freq = (fftLine * samplingFreq) / (noOfLines << 1);
temp = atan_1000((center_freq << 2) / (3*10));
- bvalFFTLine =
+ bvalFFTLine =
(26600 * atan_1000((center_freq*76) / 100) + 7*temp*temp) / (2*1000*1000 / BARC_SCALE);
-
+
return saturate(bvalFFTLine);
}
@@ -148,17 +148,17 @@ static void initThrQuiet(Word16 numPb,
for(i=0; i<numPb; i++) {
Word16 bv1, bv2;
-
+
if (i>0)
bv1 = (pbBarcVal[i] + pbBarcVal[i-1]) >> 1;
else
bv1 = pbBarcVal[i] >> 1;
-
+
if (i < (numPb - 1))
bv2 = (pbBarcVal[i] + pbBarcVal[i+1]) >> 1;
else {
- bv2 = pbBarcVal[i];
+ bv2 = pbBarcVal[i];
}
bv1 = min((bv1 / BARC_SCALE), max_bark);
@@ -166,9 +166,9 @@ static void initThrQuiet(Word16 numPb,
barcThrQuiet = min(BARC_THR_QUIET[bv1], BARC_THR_QUIET[bv2]);
-
+
/*
- we calculate
+ we calculate
pow(10.0f,(float)(barcThrQuiet - ABS_LEV)*0.1)*(float)ABS_LOW*(pbOffset[i+1] - pbOffset[i]);
*/
@@ -196,47 +196,47 @@ static void initSpreading(Word16 numPb,
Word16 i;
Word16 maskLowSprEn, maskHighSprEn;
-
+
if (sub(blockType, SHORT_WINDOW) != 0) {
- maskLowSprEn = maskLowSprEnLong;
-
+ maskLowSprEn = maskLowSprEnLong;
+
if (bitrate > 22000)
maskHighSprEn = maskHighSprEnLong;
else
maskHighSprEn = maskHighSprEnLongLowBr;
}
else {
- maskLowSprEn = maskLowSprEnShort;
- maskHighSprEn = maskHighSprEnShort;
+ maskLowSprEn = maskLowSprEnShort;
+ maskHighSprEn = maskHighSprEnShort;
}
for(i=0; i<numPb; i++) {
-
+
if (i > 0) {
Word32 dbVal;
Word16 dbark = pbBarcValue[i] - pbBarcValue[i-1];
/*
- we calulate pow(10.0f, -0.1*dbVal/BARC_SCALE)
+ we calulate pow(10.0f, -0.1*dbVal/BARC_SCALE)
*/
dbVal = (maskHigh * dbark);
pbMaskHiFactor[i] = round16(pow2_xy(L_negate(dbVal), (Word32)LOG2_1000)); /* 0.301 log10(2) */
-
+
dbVal = (maskLow * dbark);
- pbMaskLoFactor[i-1] = round16(pow2_xy(L_negate(dbVal),(Word32)LOG2_1000));
-
-
+ pbMaskLoFactor[i-1] = round16(pow2_xy(L_negate(dbVal),(Word32)LOG2_1000));
+
+
dbVal = (maskHighSprEn * dbark);
- pbMaskHiFactorSprEn[i] = round16(pow2_xy(L_negate(dbVal),(Word32)LOG2_1000));
+ pbMaskHiFactorSprEn[i] = round16(pow2_xy(L_negate(dbVal),(Word32)LOG2_1000));
dbVal = (maskLowSprEn * dbark);
pbMaskLoFactorSprEn[i-1] = round16(pow2_xy(L_negate(dbVal),(Word32)LOG2_1000));
}
else {
- pbMaskHiFactor[i] = 0;
- pbMaskLoFactor[numPb-1] = 0;
+ pbMaskHiFactor[i] = 0;
+ pbMaskLoFactor[numPb-1] = 0;
- pbMaskHiFactorSprEn[i] = 0;
- pbMaskLoFactorSprEn[numPb-1] = 0;
+ pbMaskHiFactorSprEn[i] = 0;
+ pbMaskLoFactorSprEn[numPb-1] = 0;
}
}
@@ -258,12 +258,12 @@ static void initBarcValues(Word16 numPb,
Word16 i;
Word16 pbBval0, pbBval1;
- pbBval0 = 0;
+ pbBval0 = 0;
for(i=0; i<numPb; i++){
pbBval1 = BarcLineValue(numLines, pbOffset[i+1], samplingFrequency);
pbBval[i] = (pbBval0 + pbBval1) >> 1;
- pbBval0 = pbBval1;
+ pbBval0 = pbBval1;
}
}
@@ -295,38 +295,38 @@ static void initMinSnr(const Word32 bitrate,
pePerWindow = bits2pe(extract_l((bitrate * numLines) / samplerate));
- pbVal0 = 0;
+ pbVal0 = 0;
for (sfb=0; sfb<sfbActive; sfb++) {
pbVal1 = (pbBarcVal[sfb] << 1) - pbVal0;
barcWidth = pbVal1 - pbVal0;
- pbVal0 = pbVal1;
+ pbVal0 = pbVal1;
/* allow at least 2.4% of pe for each active barc */
pePart = ((pePerWindow * 24) * (max_bark * barcWidth)) /
(pbBarcVal[sfbActive-1] * (sfbOffset[sfb+1] - sfbOffset[sfb]));
-
-
- pePart = min(pePart, 8400);
+
+
+ pePart = min(pePart, 8400);
pePart = max(pePart, 1400);
/* minSnr(n) = 1/(2^sfbPemin(n)/w(n) - 1.5)*/
/* we add an offset of 2^16 to the pow functions */
/* 0xc000 = 1.5*(1 << 15)*/
-
+
snr = pow2_xy((pePart - 16*1000),1000) - 0x0000c000;
-
+
if(snr > 0x00008000)
{
shift = norm_l(snr);
- snr = Div_32(0x00008000 << shift, snr << shift);
+ snr = Div_32(0x00008000 << shift, snr << shift);
}
else
{
snr = 0x7fffffff;
}
-
+
/* upper limit is -1 dB */
snr = min(snr, c_maxsnr);
/* lower limit is -25 dB */
@@ -354,7 +354,7 @@ Word16 InitPsyConfigurationLong(Word32 bitrate,
/*
init sfb table
*/
- samplerateindex = GetSRIndex(samplerate);
+ samplerateindex = GetSRIndex(samplerate);
psyConf->sfbCnt = sfBandTotalLong[samplerateindex];
psyConf->sfbOffset = sfBandTabLong + sfBandTabLongOffset[samplerateindex];
psyConf->sampRateIdx = samplerateindex;
@@ -391,19 +391,19 @@ Word16 InitPsyConfigurationLong(Word32 bitrate,
/*
init ratio
*/
- psyConf->ratio = c_ratio;
+ psyConf->ratio = c_ratio;
- psyConf->maxAllowedIncreaseFactor = 2;
- psyConf->minRemainingThresholdFactor = c_minRemainingThresholdFactor; /* 0.01 *(1 << 15)*/
+ psyConf->maxAllowedIncreaseFactor = 2;
+ psyConf->minRemainingThresholdFactor = c_minRemainingThresholdFactor; /* 0.01 *(1 << 15)*/
- psyConf->clipEnergy = c_maxClipEnergyLong;
+ psyConf->clipEnergy = c_maxClipEnergyLong;
psyConf->lowpassLine = extract_l((bandwidth<<1) * FRAME_LEN_LONG / samplerate);
for (sfb = 0; sfb < psyConf->sfbCnt; sfb++) {
if (sub(psyConf->sfbOffset[sfb], psyConf->lowpassLine) >= 0)
break;
}
- psyConf->sfbActive = sfb;
+ psyConf->sfbActive = sfb;
/*
calculate minSnr
@@ -429,7 +429,7 @@ Word16 InitPsyConfigurationLong(Word32 bitrate,
Word16 InitPsyConfigurationShort(Word32 bitrate,
Word32 samplerate,
Word16 bandwidth,
- PSY_CONFIGURATION_SHORT *psyConf)
+ PSY_CONFIGURATION_SHORT *psyConf)
{
Word32 samplerateindex;
Word16 sfbBarcVal[MAX_SFB_SHORT];
@@ -437,7 +437,7 @@ Word16 InitPsyConfigurationShort(Word32 bitrate,
/*
init sfb table
*/
- samplerateindex = GetSRIndex(samplerate);
+ samplerateindex = GetSRIndex(samplerate);
psyConf->sfbCnt = sfBandTotalShort[samplerateindex];
psyConf->sfbOffset = sfBandTabShort + sfBandTabShortOffset[samplerateindex];
psyConf->sampRateIdx = samplerateindex;
@@ -473,21 +473,21 @@ Word16 InitPsyConfigurationShort(Word32 bitrate,
/*
init ratio
*/
- psyConf->ratio = c_ratio;
+ psyConf->ratio = c_ratio;
- psyConf->maxAllowedIncreaseFactor = 2;
- psyConf->minRemainingThresholdFactor = c_minRemainingThresholdFactor;
+ psyConf->maxAllowedIncreaseFactor = 2;
+ psyConf->minRemainingThresholdFactor = c_minRemainingThresholdFactor;
- psyConf->clipEnergy = c_maxClipEnergyShort;
+ psyConf->clipEnergy = c_maxClipEnergyShort;
psyConf->lowpassLine = extract_l(((bandwidth << 1) * FRAME_LEN_SHORT) / samplerate);
-
+
for (sfb = 0; sfb < psyConf->sfbCnt; sfb++) {
-
+
if (psyConf->sfbOffset[sfb] >= psyConf->lowpassLine)
break;
}
- psyConf->sfbActive = sfb;
+ psyConf->sfbActive = sfb;
/*
calculate minSnr
generated by cgit v1.1 at 2024-05-28 21:34:16 +0000