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Makes stereo savings still less aggressive

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Caps the savings at 1 bit per (coded) sample. This doesn't really increase
the bitrate and fixes some issues, e.g. with IgorC's "twilight" sample.
This commit is contained in:
Jean-Marc Valin 2013-10-28 14:15:18 -04:00
parent 5484a28063
commit 9c23f5cdca
1 changed files with 1 additions and 0 deletions
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1
celt/celt_encoder.c
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@ -1156,6 +1156,7 @@ static int compute_vbr(const CELTMode *mode, AnalysisInfo *analysis, opus_int32
coded_stereo_dof = (eBands[coded_stereo_bands]<<LM)-coded_stereo_bands;
/* Maximum fraction of the bits we can save if the signal is mono. */
max_frac = DIV32_16(MULT16_16(QCONST16(0.8f, 15), coded_stereo_dof), coded_bins);
stereo_saving = MIN16(stereo_saving, QCONST16(1.f, 8));
/*printf("%d %d %d ", coded_stereo_dof, coded_bins, tot_boost);*/
target -= (opus_int32)MIN32(MULT16_32_Q15(max_frac,target),
SHR32(MULT16_16(stereo_saving-QCONST16(0.1f,8),(coded_stereo_dof<<BITRES)),8));