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Diffstat (limited to 'libAACdec/src/aacdec_drc.cpp')
-rw-r--r--libAACdec/src/aacdec_drc.cpp64
1 files changed, 34 insertions, 30 deletions
diff --git a/libAACdec/src/aacdec_drc.cpp b/libAACdec/src/aacdec_drc.cpp
index 58abea2..9049353 100644
--- a/libAACdec/src/aacdec_drc.cpp
+++ b/libAACdec/src/aacdec_drc.cpp
@@ -42,7 +42,7 @@
#define DRC_PARAMETER_BITS ( 7 )
#define DRC_MAX_QUANT_STEPS ( 1<<DRC_PARAMETER_BITS )
#define DRC_MAX_QUANT_FACTOR ( DRC_MAX_QUANT_STEPS-1 )
-#define DRC_PARAM_QUANT_STEP ( FL2FXCONST_DBL(1.0f/(float)DRC_MAX_QUANT_STEPS) )
+#define DRC_PARAM_QUANT_STEP ( FL2FXCONST_DBL(1.0f/(float)DRC_MAX_QUANT_FACTOR) )
#define DRC_PARAM_SCALE ( 1 )
#define MAX_REFERENCE_LEVEL ( 127 )
@@ -99,6 +99,7 @@ void aacDecoder_drcInitChannelData (
pDrcChData->bandTop[0] = (1024 >> 2) - 1;
pDrcChData->drcValue[0] = 0;
pDrcChData->drcInterpolationScheme = 0;
+ pDrcChData->drcDataType = UNKNOWN_PAYLOAD;
}
}
@@ -130,7 +131,7 @@ AAC_DECODER_ERROR aacDecoder_drcSetParam (
if (self == NULL) {
return AAC_DEC_INVALID_HANDLE;
}
- self->params.cut = (FIXP_DBL)((INT)(DRC_PARAM_QUANT_STEP>>DRC_PARAM_SCALE) * (INT)(value+1));
+ self->params.cut = (FIXP_DBL)((INT)(DRC_PARAM_QUANT_STEP>>DRC_PARAM_SCALE) * (INT)value);
break;
case DRC_BOOST_SCALE:
/* set boost factor */
@@ -141,7 +142,7 @@ AAC_DECODER_ERROR aacDecoder_drcSetParam (
if (self == NULL) {
return AAC_DEC_INVALID_HANDLE;
}
- self->params.boost = (FIXP_DBL)((INT)(DRC_PARAM_QUANT_STEP>>DRC_PARAM_SCALE) * (INT)(value+1));
+ self->params.boost = (FIXP_DBL)((INT)(DRC_PARAM_QUANT_STEP>>DRC_PARAM_SCALE) * (INT)value);
break;
case TARGET_REF_LEVEL:
if ( value > MAX_REFERENCE_LEVEL
@@ -300,14 +301,13 @@ int aacDecoder_drcMarkPayload (
break;
case DVB_DRC_ANC_DATA:
+ bitCnt += 8;
/* check sync word */
if (FDKreadBits(bs, 8) == DVB_ANC_DATA_SYNC_BYTE)
{
int dmxLevelsPresent, compressionPresent;
int coarseGrainTcPresent, fineGrainTcPresent;
- bitCnt+=8;
-
/* bs_info field */
FDKreadBits(bs, 8); /* mpeg_audio_type, dolby_surround_mode, presentation_mode */
bitCnt+=8;
@@ -432,7 +432,7 @@ static int aacDecoder_drcParse (
}
/* Set DRC payload type */
- pDrcBs->type = MPEG_DRC_EXT_DATA;
+ pDrcBs->channelData.drcDataType = MPEG_DRC_EXT_DATA;
return (bitCnt);
}
@@ -515,23 +515,26 @@ static int aacDecoder_drcReadCompression (
if ( compressionOn ) {
/* A compression value is available so store the data just like MPEG DRC data */
- pDrcBs->channelData.drcValue[0] = compressionValue;
- pDrcBs->channelData.numBands = 1; /* one value for all bands */
- pDrcBs->pceInstanceTag = -1; /* not present */
- pDrcBs->progRefLevel = -1; /* not present */
+ pDrcBs->channelData.numBands = 1; /* One band ... */
+ pDrcBs->channelData.drcValue[0] = compressionValue; /* ... with one value ... */
+ pDrcBs->channelData.bandTop[0] = (1024 >> 2) - 1; /* ... comprising the whole spectrum. */
+ pDrcBs->pceInstanceTag = -1; /* Not present */
+ pDrcBs->progRefLevel = -1; /* Not present */
+ pDrcBs->channelData.drcDataType = DVB_DRC_ANC_DATA; /* Set DRC payload type to DVB. */
} else {
/* No compression value available */
/* CAUTION: It is not clearly defined by standard how to react in this situation. */
- pDrcBs->channelData.drcValue[0] = 0x7F; /* 0dB */
- pDrcBs->channelData.bandTop[0] = 0;
+ /* Turn down the compression value to aprox. 0dB */
+ pDrcBs->channelData.numBands = 1; /* One band ... */
+ pDrcBs->channelData.drcValue[0] = 0x80; /* ... with aprox. 0dB ... */
+ pDrcBs->channelData.bandTop[0] = (1024 >> 2) - 1; /* ... comprising the whole spectrum. */
+ pDrcBs->channelData.drcDataType = DVB_DRC_ANC_DATA; /* Set DRC payload type to DVB. */
/* If compression_on field is set to "0" the compression_value field shall be "0000 0000". */
if (compressionValue != 0) {
return 0;
}
}
- /* Set DRC payload type now because the payload seems to be correct. */
- pDrcBs->type = DVB_DRC_ANC_DATA;
}
/* Read timecodes if available just to get the right amount of bits. */
@@ -617,7 +620,7 @@ static int aacDecoder_drcExtractAndMap (
CDrcPayload *pThreadBs = &threadBs[thread];
int numExclChns = 0;
- switch (pThreadBs->type) {
+ switch ((AACDEC_DRC_PAYLOAD_TYPE)pThreadBs->channelData.drcDataType) {
default:
continue;
case MPEG_DRC_EXT_DATA:
@@ -659,7 +662,7 @@ static int aacDecoder_drcExtractAndMap (
/* thread applies to this channel */
- if ( (pThreadBs->type == MPEG_DRC_EXT_DATA)
+ if ( (pThreadBs->channelData.drcDataType == MPEG_DRC_EXT_DATA)
&& ( (numExcludedChns[thread] == 0)
|| (!(pThreadBs->excludedChnsMask & (1<<ch))) ) ) {
present++;
@@ -678,6 +681,7 @@ static int aacDecoder_drcExtractAndMap (
{
CDrcPayload *pThreadBs = validThreadBs[thread];
INT exclMask = pThreadBs->excludedChnsMask;
+ AACDEC_DRC_PAYLOAD_TYPE drcPayloadType = (AACDEC_DRC_PAYLOAD_TYPE)pThreadBs->channelData.drcDataType;
int ch;
/* last progRefLevel transmitted is the one that is used
@@ -692,9 +696,9 @@ static int aacDecoder_drcExtractAndMap (
int mapedChannel = channelMapping[ch];
if ( ((exclMask & (1<<mapedChannel)) == 0)
- && ( ( self->params.applyHeavyCompression && (pThreadBs->type == DVB_DRC_ANC_DATA))
- || (!self->params.applyHeavyCompression && (pThreadBs->type == MPEG_DRC_EXT_DATA)) )
- ) {
+ && ( (drcPayloadType == MPEG_DRC_EXT_DATA)
+ || ((drcPayloadType == DVB_DRC_ANC_DATA) && self->params.applyHeavyCompression)
+ ) ) {
/* copy thread to channel */
pAacDecoderStaticChannelInfo[ch]->drcData = pThreadBs->channelData;
}
@@ -781,10 +785,17 @@ void aacDecoder_drcApply (
UCHAR drcVal = pDrcChData->drcValue[band];
top = fixMin((int)( (pDrcChData->bandTop[band]+1)<<2 ), aacFrameSize);
- if ( pParams->applyHeavyCompression ) {
+ fact_mantissa[band] = FL2FXCONST_DBL(0.5f);
+ fact_exponent[band] = 1;
+
+ if ( pParams->applyHeavyCompression
+ && ((AACDEC_DRC_PAYLOAD_TYPE)pDrcChData->drcDataType == DVB_DRC_ANC_DATA) )
+ {
INT compressionFactorVal_e;
- int valX = drcVal >> 4;
- int valY = drcVal & 0x0F;
+ int valX, valY;
+
+ valX = drcVal >> 4;
+ valY = drcVal & 0x0F;
/* calculate the unscaled heavy compression factor.
compressionFactor = 48.164 - 6.0206*valX - 0.4014*valY dB
@@ -801,11 +812,8 @@ void aacDecoder_drcApply (
fact_exponent[band] = DVB_COMPRESSION_SCALE - valX + compressionFactorVal_e;
}
- else {
- fact_mantissa[band] = FL2FXCONST_DBL(0.5f);
- fact_exponent[band] = 1;
- }
} else
+ if ((AACDEC_DRC_PAYLOAD_TYPE)pDrcChData->drcDataType == MPEG_DRC_EXT_DATA)
{
/* apply the scaled dynamic range control words to factor.
* if scaling drc_cut (or drc_boost), or control word drc_mantissa is 0
@@ -824,10 +832,6 @@ void aacDecoder_drcApply (
3+DRC_PARAM_SCALE,
&fact_exponent[band] );
}
- else {
- fact_mantissa[band] = FL2FXCONST_DBL(0.5f);
- fact_exponent[band] = 1;
- }
}
fact_mantissa[band] = fMult(fact_mantissa[band], norm_mantissa);
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-22 02:00:57 +0000