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-rw-r--r--libSBRdec/src/sbr_dec.cpp18
-rw-r--r--libSBRdec/src/sbrdec_drc.cpp37
-rw-r--r--libSBRdec/src/sbrdec_drc.h1
-rw-r--r--libSBRdec/src/sbrdecoder.cpp19
4 files changed, 53 insertions, 22 deletions
diff --git a/libSBRdec/src/sbr_dec.cpp b/libSBRdec/src/sbr_dec.cpp
index 5a8b320..bd3cd10 100644
--- a/libSBRdec/src/sbr_dec.cpp
+++ b/libSBRdec/src/sbr_dec.cpp
@@ -585,14 +585,16 @@ sbr_dec ( HANDLE_SBR_DEC hSbrDec, /*!< handle to Decoder channel */
int maxShift = 0;
- if (hSbrDec->sbrDrcChannel.prevFact_exp > maxShift) {
- maxShift = hSbrDec->sbrDrcChannel.prevFact_exp;
- }
- if (hSbrDec->sbrDrcChannel.currFact_exp > maxShift) {
- maxShift = hSbrDec->sbrDrcChannel.currFact_exp;
- }
- if (hSbrDec->sbrDrcChannel.nextFact_exp > maxShift) {
- maxShift = hSbrDec->sbrDrcChannel.nextFact_exp;
+ if (hSbrDec->sbrDrcChannel.enable != 0) {
+ if (hSbrDec->sbrDrcChannel.prevFact_exp > maxShift) {
+ maxShift = hSbrDec->sbrDrcChannel.prevFact_exp;
+ }
+ if (hSbrDec->sbrDrcChannel.currFact_exp > maxShift) {
+ maxShift = hSbrDec->sbrDrcChannel.currFact_exp;
+ }
+ if (hSbrDec->sbrDrcChannel.nextFact_exp > maxShift) {
+ maxShift = hSbrDec->sbrDrcChannel.nextFact_exp;
+ }
}
/* copy DRC data to right channel (with PS both channels use the same DRC gains) */
diff --git a/libSBRdec/src/sbrdec_drc.cpp b/libSBRdec/src/sbrdec_drc.cpp
index ce5247a..7497b66 100644
--- a/libSBRdec/src/sbrdec_drc.cpp
+++ b/libSBRdec/src/sbrdec_drc.cpp
@@ -115,17 +115,17 @@ void sbrDecoder_drcInitChannel (
}
for (band = 0; band < (64); band++) {
- hDrcData->prevFact_mag[band] = (FIXP_DBL)MAXVAL_DBL /*FL2FXCONST_DBL(1.0f)*/;
+ hDrcData->prevFact_mag[band] = FL2FXCONST_DBL(0.5f);
}
for (band = 0; band < SBRDEC_MAX_DRC_BANDS; band++) {
- hDrcData->currFact_mag[band] = (FIXP_DBL)MAXVAL_DBL /*FL2FXCONST_DBL(1.0f)*/;
- hDrcData->nextFact_mag[band] = (FIXP_DBL)MAXVAL_DBL /*FL2FXCONST_DBL(1.0f)*/;
+ hDrcData->currFact_mag[band] = FL2FXCONST_DBL(0.5f);
+ hDrcData->nextFact_mag[band] = FL2FXCONST_DBL(0.5f);
}
- hDrcData->prevFact_exp = 0;
- hDrcData->currFact_exp = 0;
- hDrcData->nextFact_exp = 0;
+ hDrcData->prevFact_exp = 1;
+ hDrcData->currFact_exp = 1;
+ hDrcData->nextFact_exp = 1;
hDrcData->numBandsCurr = 0;
hDrcData->numBandsNext = 0;
@@ -238,7 +238,7 @@ void sbrDecoder_drcApplySlot (
}
else {
if (j >= offset[hDrcData->drcInterpolationSchemeCurr - 1]) {
- alphaValue = FL2FXCONST_DBL(1.0f);
+ alphaValue = (FIXP_DBL)MAXVAL_DBL;
}
}
}
@@ -262,7 +262,7 @@ void sbrDecoder_drcApplySlot (
}
else {
if (j >= offset[hDrcData->drcInterpolationSchemeNext - 1]) {
- alphaValue = FL2FXCONST_DBL(1.0f);
+ alphaValue = (FIXP_DBL)MAXVAL_DBL;
}
}
@@ -301,7 +301,7 @@ void sbrDecoder_drcApplySlot (
}
else {
if (j >= offset[hDrcData->drcInterpolationSchemeNext - 1]) {
- alphaValue = FL2FXCONST_DBL(1.0f);
+ alphaValue = (FIXP_DBL)MAXVAL_DBL;
}
}
}
@@ -322,7 +322,7 @@ void sbrDecoder_drcApplySlot (
for (band = 0; band < (int)numBands; band++) {
int bottomQmf, topQmf;
- FIXP_DBL drcFact_mag = FL2FXCONST_DBL(1.0f);
+ FIXP_DBL drcFact_mag = (FIXP_DBL)MAXVAL_DBL;
topMdct = (bandTop[band]+1) << 2;
@@ -361,7 +361,13 @@ void sbrDecoder_drcApplySlot (
}
/* interpolate */
- drcFact_mag = fMult(alphaValue, drcFact2_mag) + fMult((FL2FXCONST_DBL(1.0f) - alphaValue), drcFact1_mag);
+ if (alphaValue == (FIXP_DBL)0) {
+ drcFact_mag = drcFact1_mag;
+ } else if (alphaValue == (FIXP_DBL)MAXVAL_DBL) {
+ drcFact_mag = drcFact2_mag;
+ } else {
+ drcFact_mag = fMult(alphaValue, drcFact2_mag) + fMult(((FIXP_DBL)MAXVAL_DBL - alphaValue), drcFact1_mag);
+ }
/* apply scaling */
qmfRealSlot[bin] = fMult(qmfRealSlot[bin], drcFact_mag);
@@ -481,6 +487,15 @@ void sbrDecoder_drcApply (
int col;
int maxShift = 0;
+ if (hDrcData == NULL) {
+ return;
+ }
+ if ( (hDrcData->enable == 0)
+ || ((hDrcData->numBandsCurr == 0) && (hDrcData->numBandsNext == 0))
+ ) {
+ return; /* Avoid changing the scaleFactor even though the processing is disabled. */
+ }
+
/* get max scale factor */
if (hDrcData->prevFact_exp > maxShift) {
maxShift = hDrcData->prevFact_exp;
diff --git a/libSBRdec/src/sbrdec_drc.h b/libSBRdec/src/sbrdec_drc.h
index 2577e89..14deff7 100644
--- a/libSBRdec/src/sbrdec_drc.h
+++ b/libSBRdec/src/sbrdec_drc.h
@@ -94,6 +94,7 @@ amm-info@iis.fraunhofer.de
#include "sbrdecoder.h"
+
#define SBRDEC_MAX_DRC_CHANNELS (6)
#define SBRDEC_MAX_DRC_BANDS ( 16 )
diff --git a/libSBRdec/src/sbrdecoder.cpp b/libSBRdec/src/sbrdecoder.cpp
index a40e5ba..192bdd2 100644
--- a/libSBRdec/src/sbrdecoder.cpp
+++ b/libSBRdec/src/sbrdecoder.cpp
@@ -137,7 +137,7 @@ amm-info@iis.fraunhofer.de
/* Decoder library info */
#define SBRDECODER_LIB_VL0 2
#define SBRDECODER_LIB_VL1 1
-#define SBRDECODER_LIB_VL2 2
+#define SBRDECODER_LIB_VL2 3
#define SBRDECODER_LIB_TITLE "SBR Decoder"
#define SBRDECODER_LIB_BUILD_DATE __DATE__
#define SBRDECODER_LIB_BUILD_TIME __TIME__
@@ -533,7 +533,7 @@ SBR_ERROR sbrDecoder_InitElement (
FDKmemclear(self->pSbrElement[elementIndex]->frameErrorFlag, ((1)+1)*sizeof(UCHAR));
/* Initialize this instance */
- sbrError = sbrDecoder_ResetElement(
+ sbrError = sbrDecoder_ResetElement(
self,
sampleRateIn,
sampleRateOut,
@@ -577,7 +577,7 @@ SBR_ERROR sbrDecoder_HeaderUpdate(
)
{
SBR_ERROR errorStatus = SBRDEC_OK;
-
+
/*
change of control data, reset decoder
*/
@@ -818,6 +818,7 @@ SBR_ERROR sbrDecoder_drcFeedChannel ( HANDLE_SBRDECODER self,
USHORT *pBandTop )
{
SBRDEC_DRC_CHANNEL *pSbrDrcChannelData = NULL;
+ int band, isValidData = 0;
if (self == NULL) {
return SBRDEC_NOT_INITIALIZED;
@@ -826,10 +827,21 @@ SBR_ERROR sbrDecoder_drcFeedChannel ( HANDLE_SBRDECODER self,
return SBRDEC_SET_PARAM_FAIL;
}
+ /* Search for gain values different to 1.0f */
+ for (band = 0; band < numBands; band += 1) {
+ if ( !((pNextFact_mag[band] == FL2FXCONST_DBL(0.5)) && (nextFact_exp == 1))
+ && !((pNextFact_mag[band] == (FIXP_DBL)MAXVAL_DBL) && (nextFact_exp == 0)) ) {
+ isValidData = 1;
+ break;
+ }
+ }
+
/* Find the right SBR channel */
pSbrDrcChannelData = sbrDecoder_drcGetChannel( self, ch );
if ( pSbrDrcChannelData != NULL ) {
+ if ( pSbrDrcChannelData->enable || isValidData )
+ { /* Activate processing only with real and valid data */
int i;
pSbrDrcChannelData->enable = 1;
@@ -844,6 +856,7 @@ SBR_ERROR sbrDecoder_drcFeedChannel ( HANDLE_SBRDECODER self,
pSbrDrcChannelData->nextFact_mag[i] = pNextFact_mag[i];
}
}
+ }
return SBRDEC_OK;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 05:06:01 +0000