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More general Laplace encoder

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Jean-Marc Valin 2022-09-15 14:38:13 -04:00
parent 4414db08f9
commit 59dce643b1
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GPG key ID: 531A52533318F00A
5 changed files with 153 additions and 0 deletions
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21
celt/entdec.c
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@ -195,6 +195,27 @@ int ec_dec_icdf(ec_dec *_this,const unsigned char *_icdf,unsigned _ftb){
return ret;
}
int ec_dec_icdf16(ec_dec *_this,const opus_uint16 *_icdf,unsigned _ftb){
opus_uint32 r;
opus_uint32 d;
opus_uint32 s;
opus_uint32 t;
int ret;
s=_this->rng;
d=_this->val;
r=s>>_ftb;
ret=-1;
do{
t=s;
s=IMUL32(r,_icdf[++ret]);
}
while(d<s);
_this->val=d-s;
_this->rng=t-s;
ec_dec_normalize(_this);
return ret;
}
opus_uint32 ec_dec_uint(ec_dec *_this,opus_uint32 _ft){
unsigned ft;
unsigned s;