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Making qn code 16-bit clean while simplifying it

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This commit is contained in:
Jean-Marc Valin 2010-08-05 17:39:13 -04:00
parent 88c59a534b
commit aa995ddde3
1 changed files with 3 additions and 3 deletions
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6
libcelt/bands.c
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@ -413,7 +413,7 @@ static int compute_qn(int N, int b, int offset, int stereo)
int N2 = 2*N-1; int N2 = 2*N-1;
if (stereo && N==2) if (stereo && N==2)
N2--; N2--;
qb = (b+N2*offset)/(N2); qb = (b+N2*offset)/N2;
if (qb > (b>>1)-(1<<BITRES)) if (qb > (b>>1)-(1<<BITRES))
qb = (b>>1)-(1<<BITRES); qb = (b>>1)-(1<<BITRES);
@ -425,8 +425,8 @@ static int compute_qn(int N, int b, int offset, int stereo)
if (qb<(1<<BITRES>>1)) { if (qb<(1<<BITRES>>1)) {
qn = 1; qn = 1;
} else { } else {
qn = ((1<<(qb>>BITRES))*exp2_table8[qb&0x7] + (1<<14))>>14; qn = exp2_table8[qb&0x7]>>(14-(qb>>BITRES));
qn = qn>>1<<1; qn = (qn+1)>>1<<1;
if (qn>1024) if (qn>1024)
qn = 1024; qn = 1024;
} }