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| author | Matthias P. Braendli <matthias.braendli@mpb.li> | 2021-06-01 14:25:25 +0200 |
|---|---|---|
| committer | Matthias P. Braendli <matthias.braendli@mpb.li> | 2021-06-01 14:25:25 +0200 |
| commit | e778887e4e5589528b06b04404ce4c71aaae267a (patch) | |
| tree | fcce7bfb237a99ac174e16611f39bf363f6b280c /libSBRdec/src/lpp_tran.cpp | |
| parent | 97182034e8829014bdfc0449c2116d629196f1d4 (diff) | |
| parent | 801f67f671929311e0c9952c5f92d6e147c7b003 (diff) | |
| download | fdk-aac-e778887e4e5589528b06b04404ce4c71aaae267a.tar.gz fdk-aac-e778887e4e5589528b06b04404ce4c71aaae267a.tar.bz2 fdk-aac-e778887e4e5589528b06b04404ce4c71aaae267a.zip | |
Merge v2.0.2 into dabplus2
Diffstat (limited to 'libSBRdec/src/lpp_tran.cpp')
| -rw-r--r-- | libSBRdec/src/lpp_tran.cpp | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/libSBRdec/src/lpp_tran.cpp b/libSBRdec/src/lpp_tran.cpp index 6acb626..93e1158 100644 --- a/libSBRdec/src/lpp_tran.cpp +++ b/libSBRdec/src/lpp_tran.cpp @@ -1014,8 +1014,8 @@ void lppTransposerHBE( pSettings->nCols) + lowBandShift); - dynamicScale = fixMax( - 0, dynamicScale - 1); /* one additional bit headroom to prevent -1.0 */ + dynamicScale = + dynamicScale - 1; /* one additional bit headroom to prevent -1.0 */ /* Scale temporal QMF buffer. @@ -1194,6 +1194,9 @@ void lppTransposerHBE( } else { /* bw <= 0 */ int descale = fixMin(DFRACT_BITS - 1, (LPC_SCALE_FACTOR + dynamicScale)); + dynamicScale += + 1; /* prevent negativ scale factor due to 'one additional bit + headroom' */ for (i = startSample; i < stopSample; i++) { FIXP_DBL accu1, accu2; @@ -1210,9 +1213,9 @@ void lppTransposerHBE( dynamicScale; qmfBufferReal[i][loBand] = - (lowBandReal[LPC_ORDER + i] >> descale) + (accu1 << 1); + (lowBandReal[LPC_ORDER + i] >> descale) + (accu1 << (1 + 1)); qmfBufferImag[i][loBand] = - (lowBandImag[LPC_ORDER + i] >> descale) + (accu2 << 1); + (lowBandImag[LPC_ORDER + i] >> descale) + (accu2 << (1 + 1)); } } /* bw <= 0 */ |