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-rw-r--r--media/libstagefright/codecs/aacenc/src/sf_estim.c124
1 files changed, 62 insertions, 62 deletions
diff --git a/media/libstagefright/codecs/aacenc/src/sf_estim.c b/media/libstagefright/codecs/aacenc/src/sf_estim.c
index d34b365..ffe2e83 100644
--- a/media/libstagefright/codecs/aacenc/src/sf_estim.c
+++ b/media/libstagefright/codecs/aacenc/src/sf_estim.c
@@ -1,26 +1,26 @@
-/*
- ** Copyright 2003-2010, VisualOn, Inc.
- **
- ** Licensed under the Apache License, Version 2.0 (the "License");
- ** you may not use this file except in compliance with the License.
- ** You may obtain a copy of the License at
- **
- ** http://www.apache.org/licenses/LICENSE-2.0
- **
- ** Unless required by applicable law or agreed to in writing, software
- ** distributed under the License is distributed on an "AS IS" BASIS,
- ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- ** See the License for the specific language governing permissions and
- ** limitations under the License.
- */
-/*******************************************************************************
- File: sf_estim.c
-
- Content: Scale factor estimation functions
-
+/*
+ ** Copyright 2003-2010, VisualOn, Inc.
+ **
+ ** Licensed under the Apache License, Version 2.0 (the "License");
+ ** you may not use this file except in compliance with the License.
+ ** You may obtain a copy of the License at
+ **
+ ** http://www.apache.org/licenses/LICENSE-2.0
+ **
+ ** Unless required by applicable law or agreed to in writing, software
+ ** distributed under the License is distributed on an "AS IS" BASIS,
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ** See the License for the specific language governing permissions and
+ ** limitations under the License.
+ */
+/*******************************************************************************
+ File: sf_estim.c
+
+ Content: Scale factor estimation functions
+
*******************************************************************************/
-#include "basic_op.h"
+#include "basic_op.h"
#include "oper_32b.h"
#include "sf_estim.h"
#include "quantize.h"
@@ -45,12 +45,12 @@ constants reference in comments
#define FF_SQRT_BITS 7
#define FF_SQRT_TABLE_SIZE (1<<FF_SQRT_BITS - 1<<(FF_SQRT_BITS-2))
-#define COEF08_31 0x66666666 /* 0.8*(1 << 31) */
-#define PE_C1_8 24 /* PE_C1*8 */
-#define PE_C2_16 21 /* PE_C2*8/PE_C3 */
-#define PE_SCALE 0x059a /* 0.7 * (1 << (15 - 1 - 3))*/
-
-#define SCALE_ESTIMATE_COEF 0x5555 /* (8.8585/(4*log2(10))) * (1 << 15)*/
+#define COEF08_31 0x66666666 /* 0.8*(1 << 31) */
+#define PE_C1_8 24 /* PE_C1*8 */
+#define PE_C2_16 21 /* PE_C2*8/PE_C3 */
+#define PE_SCALE 0x059a /* 0.7 * (1 << (15 - 1 - 3))*/
+
+#define SCALE_ESTIMATE_COEF 0x5555 /* (8.8585/(4*log2(10))) * (1 << 15)*/
/*********************************************************************************
*
@@ -69,17 +69,17 @@ __inline Word32 formfac_sqrt(Word32 x)
postshift = preshift >> 1;
preshift = postshift << 1;
postshift = postshift + 8; /* sqrt/256 */
- if(preshift >= 0)
- y = x << preshift; /* now 1/4 <= y < 1 */
- else
- y = x >> (-preshift);
- y = formfac_sqrttable[y-32];
-
- if(postshift >= 0)
- y = y >> postshift;
- else
- y = y << (-postshift);
-
+ if(preshift >= 0)
+ y = x << preshift; /* now 1/4 <= y < 1 */
+ else
+ y = x >> (-preshift);
+ y = formfac_sqrttable[y-32];
+
+ if(postshift >= 0)
+ y = y >> postshift;
+ else
+ y = y << (-postshift);
+
return y;
}
@@ -97,25 +97,25 @@ CalcFormFactorChannel(Word16 *logSfbFormFactor,
Word16 *logSfbEnergy,
PSY_OUT_CHANNEL *psyOutChan)
{
- Word32 sfbw, sfbw1;
+ Word32 sfbw, sfbw1;
Word32 i, j;
Word32 sfbOffs, sfb, shift;
-
- sfbw = sfbw1 = 0;
+
+ sfbw = sfbw1 = 0;
for (sfbOffs=0; sfbOffs<psyOutChan->sfbCnt; sfbOffs+=psyOutChan->sfbPerGroup){
for (sfb=0; sfb<psyOutChan->maxSfbPerGroup; sfb++) {
i = sfbOffs+sfb;
if (psyOutChan->sfbEnergy[i] > psyOutChan->sfbThreshold[i]) {
- Word32 accu, avgFormFactor,iSfbWidth;
+ Word32 accu, avgFormFactor,iSfbWidth;
Word32 *mdctSpec;
- sfbw = psyOutChan->sfbOffsets[i+1] - psyOutChan->sfbOffsets[i];
- iSfbWidth = invSBF[(sfbw >> 2) - 1];
+ sfbw = psyOutChan->sfbOffsets[i+1] - psyOutChan->sfbOffsets[i];
+ iSfbWidth = invSBF[(sfbw >> 2) - 1];
mdctSpec = psyOutChan->mdctSpectrum + psyOutChan->sfbOffsets[i];
accu = 0;
/* calc sum of sqrt(spec) */
- for (j=sfbw; j; j--) {
- accu += formfac_sqrt(L_abs(*mdctSpec)); mdctSpec++;
+ for (j=sfbw; j; j--) {
+ accu += formfac_sqrt(L_abs(*mdctSpec)); mdctSpec++;
}
logSfbFormFactor[i] = iLog4(accu);
logSfbEnergy[i] = iLog4(psyOutChan->sfbEnergy[i]);
@@ -158,8 +158,8 @@ static Word16 improveScf(Word32 *spec,
/* calc real distortion */
sfbDist = calcSfbDist(spec, sfbWidth, scf);
- *minScfCalculated = scf;
- if(!sfbDist)
+ *minScfCalculated = scf;
+ if(!sfbDist)
return scfBest;
if (sfbDist > thresh125) {
@@ -194,7 +194,7 @@ static Word16 improveScf(Word32 *spec,
}
*minScfCalculated = scf;
cnt = cnt + 1;
- }
+ }
*dist = sfbDistBest;
}
else {
@@ -419,7 +419,7 @@ static void assimilateSingleScf(PSY_OUT_CHANNEL *psyOutChan,
prevScfLast[j] = MAX_16;
prevScfNext[j] = MAX_16;
deltaPeLast[j] = MAX_16;
- }
+ }
sfbLast = -1;
sfbAct = -1;
@@ -713,20 +713,20 @@ EstimateScaleFactorsChannel(PSY_OUT_CHANNEL *psyOutChan,
for (i=0; i<psyOutChan->sfbCnt; i++) {
- Word32 sbfwith, sbfStart;
+ Word32 sbfwith, sbfStart;
Word32 *mdctSpec;
thresh = psyOutChan->sfbThreshold[i];
energy = psyOutChan->sfbEnergy[i];
-
- sbfStart = psyOutChan->sfbOffsets[i];
- sbfwith = psyOutChan->sfbOffsets[i+1] - sbfStart;
- mdctSpec = psyOutChan->mdctSpectrum+sbfStart;
+
+ sbfStart = psyOutChan->sfbOffsets[i];
+ sbfwith = psyOutChan->sfbOffsets[i+1] - sbfStart;
+ mdctSpec = psyOutChan->mdctSpectrum+sbfStart;
maxSpec = 0;
/* maximum of spectrum */
- for (j=sbfwith; j; j-- ) {
- Word32 absSpec = L_abs(*mdctSpec); mdctSpec++;
- maxSpec |= absSpec;
+ for (j=sbfwith; j; j-- ) {
+ Word32 absSpec = L_abs(*mdctSpec); mdctSpec++;
+ maxSpec |= absSpec;
}
/* scfs without energy or with thresh>energy are marked with MIN_16 */
@@ -737,7 +737,7 @@ EstimateScaleFactorsChannel(PSY_OUT_CHANNEL *psyOutChan,
energyPart = logSfbFormFactor[i];
thresholdPart = iLog4(thresh);
- /* -20 = 4*log2(6.75) - 32 */
+ /* -20 = 4*log2(6.75) - 32 */
scfInt = ((thresholdPart - energyPart - 20) * SCALE_ESTIMATE_COEF) >> 15;
minSfMaxQuant[i] = iLog4(maxSpec) - 68; /* 68 -16/3*log(MAX_QUANT+0.5-logCon)/log(2) + 1 */
@@ -748,9 +748,9 @@ EstimateScaleFactorsChannel(PSY_OUT_CHANNEL *psyOutChan,
}
/* find better scalefactor with analysis by synthesis */
- scfInt = improveScf(psyOutChan->mdctSpectrum+sbfStart,
- sbfwith,
- thresh, scfInt, minSfMaxQuant[i],
+ scfInt = improveScf(psyOutChan->mdctSpectrum+sbfStart,
+ sbfwith,
+ thresh, scfInt, minSfMaxQuant[i],
&sfbDist[i], &minScfCalculated[i]);
scf[i] = scfInt;
generated by cgit v1.1 at 2024-05-17 02:39:07 +0000