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TurboPFor: TurboPFor decode

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2017-03-19 13:20:19 +01:00
parent faa37fef70
commit 51dadca462
1 changed files with 31 additions and 26 deletions
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57
vp4d.c
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@ -28,7 +28,7 @@
#include "conf.h"
#include "bitutil.h"
#include "bitpack.h"
#include "vint.h" //#include "vsimple.h"
#include "vint.h"
#include "vp4.h"
#define PAD8(__x) ( (((__x)+8-1)/8) )
@ -253,13 +253,14 @@ static ALIGNED(char, shuffles[16][16], 16) = {
#pragma GCC optimize ("align-functions=16")
ALWAYS_INLINE unsigned char *TEMPLATE2(_P4DEC, USIZE)(unsigned char *__restrict in, unsigned n, uint_t *__restrict out P4DELTA(uint_t start), unsigned b, unsigned bx ) {
uint_t ex[P4D_MAX+32];
#if USIZE == 64
b = ((b>>1)==63)?(64<<1):b;
#endif
if(!(b & 1))
return TEMPLATE2(BITUNPACKD, USIZE)(in, n, out P4DELTA(start), b>>1);
b >>= 1;
uint_t ex[P4D_MAX+64];
if(!(b & 0x80)) {
#if USIZE == 64
b = (b == 63)?64:b;
#endif
return TEMPLATE2(BITUNPACKD, USIZE)(in, n, out P4DELTA(start), b);
}
b &= 0x7f;
#if defined(VSIZE) && USIZE < 64
unsigned char *pb = in;
#if VSIZE == 128
@ -304,15 +305,15 @@ ALWAYS_INLINE unsigned char *TEMPLATE2(_P4DEC, USIZE)(unsigned char *__restrict
unsigned char *TEMPLATE2(P4DEC, USIZE)(unsigned char *__restrict in, unsigned n, uint_t *__restrict out P4DELTA(uint_t start) ) { if(!n) return in;
unsigned b = *in++, bx, i;
if(likely(!(b & 0x80))) {
if(b & 1)
if(likely(!(b & 0x40))) {
if(b & 0x80)
bx = *in++;
return TEMPLATE2(_P4DEC, USIZE)(in, n, out P4DELTA(start), b, bx);
}
#if USIZE > 8
else {
uint_t ex[P4D_MAX+32];
b = (b & 0x7f)>>1;
b &= 0x3f;
bx = *in++;
in = TEMPLATE2(BITUNPACK, USIZE)(in, n, out, b);
@ -354,35 +355,39 @@ size_t TEMPLATE2(P4NDEC, USIZE)(unsigned char *__restrict in, size_t n, uint_t *
*out++ = start;
--n;
#endif
for(op = out; op != out+(n&~(CSIZE-1)); op += CSIZE) { __builtin_prefetch(ip+512);
unsigned b = *ip++,bx,i;
if(likely(!(b & 0x80))) {
if(b & 1)
for(op = out; op != out+(n&~(CSIZE-1)); op += CSIZE) { __builtin_prefetch(ip+512);//ip = TEMPLATE2(P4DEC, USIZE)(ip, CSIZE, op P4DELTA(start));
unsigned b = *ip++, bx, i;
if(likely(!(b & 0x40))) {
if(b & 0x80)
bx = *ip++;
ip = TEMPLATE2(_P4DEC, USIZE)(ip, CSIZE, op P4DELTA(start), b, bx );
}
ip = TEMPLATE2(_P4DEC, USIZE)(ip, CSIZE, op P4DELTA(start), b, bx);
}
#if USIZE > 8
else {
uint_t ex[P4D_MAX+8];
b = (b & 0x7f)>>1;
bx = *ip++;
else {
uint_t ex[P4D_MAX+32];
b &= 0x3f;
bx = *ip++;
ip = TEMPLATE2(BITUNPACK, USIZE)(ip, CSIZE, op, b);
ip = TEMPLATE2(vbdec, USIZE)(ip, bx, ex);
for(i = 0; i != (bx & ~3); i += 4) {
for(i = 0; i != (bx & ~7); i += 8) {
op[ip[i ]] |= ex[i ] << b;
op[ip[i+1]] |= ex[i+1] << b;
op[ip[i+2]] |= ex[i+2] << b;
op[ip[i+3]] |= ex[i+3] << b;
}
op[ip[i+4]] |= ex[i+4] << b;
op[ip[i+5]] |= ex[i+5] << b;
op[ip[i+6]] |= ex[i+6] << b;
op[ip[i+7]] |= ex[i+7] << b;
}
for(;i < bx; i++)
op[ip[i]] |= ex[i] << b;
ip += bx;
#ifdef BITUNDD
TEMPLATE2(BITUNDD, USIZE)(op, CSIZE, start);
#endif
} // ip = TEMPLATE2(P4DEC, USIZE)(ip, CSIZE, op P4DELTA(start));
#endif
}
#endif
P4DELTA_(start = op[CSIZE-1]);
}
return TEMPLATE2(P4NDECS, USIZE)(ip, n&(CSIZE-1), op P4DELTA(start)) - in;