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update brrUtils

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tildearrow 2022-09-25 00:44:05 -05:00
parent e75f23fa61
commit 608254f07a
1 changed files with 8 additions and 5 deletions
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13
src/engine/brrUtils.c
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@ -100,30 +100,33 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart) {
}
#define DO_ONE_SAMPLE \
if (next&8) next|=0xfffffff8; \
if (next&8) next|=0xfffffff0; \
\
next<<=(buf[0]>>4); /* range */ \
next>>=1; \
\
switch (control&0xc) { /* filter */ \
case 0: \
break; \
case 4: \
next+=(last1*15)/16; \
next+=last1+((-last1)>>4); \
break; \
case 8: \
next+=((last2*61)/32)-((last1*15)/16); \
next+=last1*2+((-last1*3)>>5)-last2+(last2>>4); \
break; \
case 12: \
next+=((last2*115)/64)-((last1*13)/16); \
next+=last1*2+((-last1*13)>>6)-last2+((last2*3)>>4); \
break; \
} \
\
if (next>32767) next=32767; \
if (next<-32768) next=-32768; \
next&=0x7fff; \
if (next&0x4000) next|=0xffff8000; \
\
last2=last1; \
last1=next; \
*out=next; \
*out=next<<1; \
out++;
// TODO: