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what's going on here why is this not working

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tildearrow 2022-09-28 04:16:07 -05:00
parent 828bac32bd
commit 8cc15b398d
1 changed files with 66 additions and 20 deletions
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86
src/engine/brrUtils.c
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@ -92,6 +92,12 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart) {
short o1=0;
short o2=0;
short o0=0;
short o1f1=0;
short o1f2=0;
short o1f3=0;
short o2f1=0;
short o2f2=0;
short o2f3=0;
int last1=0;
int last2=0;
@ -132,6 +138,13 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart) {
range1=0;
range2=0;
range3=0;
o2f1=o2;
o2f2=o2;
o2f3=o2;
o1f1=o1;
o1f2=o1;
o1f3=o1;
// first pass
for (int j=0; j<16; j++) {
int s=NEXT_SAMPLE;
@ -150,26 +163,34 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart) {
o2=o1;
o1=s;
}
// calculate range of values
for (int j=0; j<16; j++) {
short s=pred1[j];
if (s<0) s=-s;
while (range1<10 && s>((8<<range1)-1)) range1++;
while (range1<12 && s>((8<<range1)-1)) range1++;
s=pred2[j];
if (s<0) s=-s;
while (range2<7 && s>((8<<range2)-1)) range2++;
while (range2<12 && s>((8<<range2)-1)) range2++;
s=pred3[j];
if (s<0) s=-s;
while (range3<7 && s>((8<<range3)-1)) range3++;
while (range3<12 && s>((8<<range3)-1)) range3++;
}
// second pass
int prevLast1=last1;
int prevLast2=last2;
for (int j=0; j<16; j++) {
short s=pred1[j];
o0=s>>range1;
if (range1) if (s&(1<<(range1>>1))) o0++;
int s=NEXT_SAMPLE;
pred1[j]=s-(((int)o1f1*15)>>4);
if (pred1[j]<-32768) pred1[j]=-32768;
if (pred1[j]>32767) pred1[j]=32767;
o0=pred1[j]>>range1;
if (range1) if (pred1[j]&(1<<(range1>>1))) o0++;
if (o0>7) o0=7;
if (o0<-8) o0=-8;
if (range1>=10) if (o0<-7) o0=-7;
o=o0&15;
if (j&1) {
next1[j>>1]|=o;
@ -177,12 +198,23 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart) {
next1[j>>1]=o<<4;
}
s=pred2[j];
o0=s>>range2;
if (range2) if (s&(1<<(range2>>1))) o0++;
nextDec=o;
DO_ONE_DEC(range1);
o2f1=last2<<1;
o1f1=last1<<1;
}
last1=prevLast1;
last2=prevLast2;
for (int j=0; j<16; j++) {
int s=NEXT_SAMPLE;
pred2[j]=s+(((int)o2f2*15)>>4)-(((int)o1f2*61)>>5);
if (pred2[j]<-32768) pred2[j]=-32768;
if (pred2[j]>32767) pred2[j]=32767;
o0=pred2[j]>>range2;
if (range2) if (pred2[j]&(1<<(range2>>1))) o0++;
if (o0>7) o0=7;
if (o0<-8) o0=-8;
if (range2>=7) if (o0<-7) o0=-7;
o=o0&15;
if (j&1) {
next2[j>>1]|=o;
@ -190,19 +222,37 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart) {
next2[j>>1]=o<<4;
}
s=pred3[j];
o0=s>>range3;
if (range3) if (s&(1<<(range3>>1))) o0++;
nextDec=o;
DO_ONE_DEC(range2);
o2f2=last2<<1;
o1f2=last1<<1;
}
last1=prevLast1;
last2=prevLast2;
for (int j=0; j<16; j++) {
int s=NEXT_SAMPLE;
pred3[j]=s+(((int)o2f3*13)>>4)-(((int)o1f3*115)>>6);
if (pred3[j]<-32768) pred3[j]=-32768;
if (pred3[j]>32767) pred3[j]=32767;
o0=pred3[j]>>range3;
if (range3) if (pred3[j]&(1<<(range3>>1))) o0++;
if (o0>7) o0=7;
if (o0<-8) o0=-8;
if (range3>=7) if (o0<-7) o0=-7;
o=o0&15;
if (j&1) {
next3[j>>1]|=o;
} else {
next3[j>>1]=o<<4;
}
nextDec=o;
DO_ONE_DEC(range3);
o2f3=last2<<1;
o1f3=last1<<1;
}
last1=prevLast1;
last2=prevLast2;
}
if (i && i!=loopStart) {
@ -235,7 +285,6 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart) {
avgError[0]+=error;
if (error>maxError[0]) maxError[0]=error;
}
avgError[0]>>=4;
last1=prevLast1;
last2=prevLast2;
@ -255,7 +304,6 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart) {
if (error>maxError[1]) maxError[1]=error;
//printf("%6d | %6d => %6d\n",s,nextDec<<1,error);
}
avgError[1]>>=4;
last1=prevLast1;
last2=prevLast2;
@ -275,7 +323,6 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart) {
if (error>maxError[2]) maxError[2]=error;
//printf("%6d | %6d => %6d\n",s,nextDec<<1,error);
}
avgError[2]>>=4;
last1=prevLast1;
last2=prevLast2;
@ -295,7 +342,6 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart) {
if (error>maxError[3]) maxError[3]=error;
//printf("%6d | %6d => %6d\n",s,nextDec<<1,error);
}
avgError[3]>>=4;
last1=prevLast1;
last2=prevLast2;
@ -308,7 +354,7 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart) {
filter=j;
}
}
//printf("block %ld: %8d %8d -> %d\n",i>>4,avgError[0],avgError[1],filter);
printf("block %ld: %8d %8d %8d %8d -> %d\n",i>>4,avgError[0],avgError[1],avgError[2],avgError[3],filter);
} else {
// don't filter on the first or loop block
filter=0;