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Dynamically selecting intra energy based on energy variations from the previous

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frame
This commit is contained in:
Jean-Marc Valin 2009-05-01 21:28:58 -04:00
parent 18a3b79d24
commit 32ec58cc3e
3 changed files with 25 additions and 6 deletions
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12
libcelt/quant_bands.c
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@ -84,6 +84,18 @@ static inline celt_word16_t amp2dB(celt_ener_t amp)
}
#endif
int intra_decision(celt_ener_t *eBands, celt_word16_t *oldEBands, int len)
{
int i;
celt_word32_t dist = 0;
for (i=0;i<len;i++)
{
celt_word16_t d = SUB16(amp2dB(eBands[i]), oldEBands[i]);
dist = MAC16_16(dist, d,d);
}
return SHR32(dist,16) > 64*len;
}
static const celt_word16_t base_resolution = QCONST16(6.f,8);
static const celt_word16_t base_resolution_1 = QCONST16(0.1666667f,15);