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TurboPFor: TurboPFor decode

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2018-03-09 17:57:52 +01:00
parent a572aa3a09
commit ffd2ba92e4
1 changed files with 32 additions and 19 deletions
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51
vp4d.c
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@ -117,23 +117,7 @@ extern char _shuffle_16[256][16];
#include "vp4d.c"
#define USIZE 64
#include "vp4d.c"
#define _P4DEC _p4dddec //deltaOfdelta
#define P4DEC p4dddec
#define P4NDEC p4ndddec
#define P4NDECS p4dddec
#define BITUNPACKD bitddunpack
#define _BITUNPACKD bitddunpack
#define BITUNDD bitdddec
#define USIZE 8
#include "vp4d.c"
#define USIZE 16
#include "vp4d.c"
#define USIZE 32
#include "vp4d.c"
#define USIZE 64
#include "vp4d.c"
#undef _P4DEC
#undef P4DEC
#undef BITUNPACK
@ -344,9 +328,38 @@ ALWAYS_INLINE unsigned char *TEMPLATE2(_P4DEC, USIZE)(unsigned char *__restrict
}
#else
{ unsigned k = 0;
uint_t *op;
for(op=out,i = 0; i < p4dn; i++,op += 64)
uint_t *op,*p;
for(op=out,i = 0; i < p4dn; i++,op += 64) {
#if 1 // faster
while(bb[i]) { unsigned x = ctz64(bb[i]); op[x] += ex[k++]<<b; bb[i] ^= (1ull<<x); }
#else
unsigned long long u = bb[i]; p = op;
#define OP(_i_) p[_i_] += ex[k++]<<b;
while(u) {
unsigned x = ctz64(u); u >>= x; p+=x;
switch(u&0xf) {
case 0: break; //0000
case 1: OP(0); break; //0001
case 2: OP(1); break; //0010
case 3: OP(1); OP(0); break; //0011
case 4: OP(2); break; //0100
case 5: OP(2); OP(0); break; //0101
case 6: OP(2); OP(1); break; //0110
case 7: OP(2); OP(1); OP(0); break; //0111
case 8: OP(3); break; //1000
case 9: OP(3); OP(0); break; //1001
case 10: OP(3); OP(1); break; //1010
case 11: OP(3); OP(1); OP(0); break; //1011
case 12: OP(3); OP(2); break; //1100
case 13: OP(3); OP(2); OP(0); break; //1101
case 14: OP(3); OP(2); OP(1); break; //1110
case 15: OP(3); OP(2); OP(1); OP(0); break; //1111
}
u >>= 4;
p += 4;
}
#endif
}
}
#endif
}