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rANS_static64c.c
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rANS_static64c.c
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#include "rans64.h"
typedef Rans64State RansState;
typedef Rans64EncSymbol RansEncSymbol;
typedef Rans64DecSymbol RansDecSymbol;
#define RansEncSymbolInit Rans64EncSymbolInit
#define RansEncInit Rans64EncInit
#define RansEncPutSymbol Rans64EncPutSymbol
#define RansEncFlush Rans64EncFlush
#define RansDecSymbolInit Rans64DecSymbolInit
#define RansDecInit Rans64DecInit
#define RansDecRenorm Rans64DecRenorm
#define RansDecGet Rans64DecGet
#define RansDecAdvanceSymbol Rans64DecAdvanceSymbol
/*-------------------------------------------------------------------------- */
/*
* Example wrapper to use the rans_byte.h functions included above.
*
* This demonstrates how to use, and unroll, an order-0 and order-1 frequency
* model.
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <assert.h>
#include <string.h>
#include <sys/time.h>
// 10 and 11 can be quite a bit faster, but 1-2% larger
#ifndef TF_SHIFT
# define TF_SHIFT 12
#endif
#define TOTFREQ (1<<TF_SHIFT)
#define ABS(a) ((a)>0?(a):-(a))
#ifndef BLK_SIZE
# define BLK_SIZE 1024*1024
#endif
// Room to allow for expanded BLK_SIZE on worst case compression.
#define BLK_SIZE2 ((int)(1.05*BLK_SIZE))
/*-----------------------------------------------------------------------------
* Memory to memory compression functions.
*
* These are original versions without any manual loop unrolling. They
* are easier to understand, but can be up to 2x slower.
*/
#define MAGIC 8
static void hist8(unsigned char *in, unsigned int in_size, int F0[256]) {
int F1[256+MAGIC] = {0}, F2[256+MAGIC] = {0}, F3[256+MAGIC] = {0};
int F4[256+MAGIC] = {0}, F5[256+MAGIC] = {0}, F6[256+MAGIC] = {0}, F7[256+MAGIC] = {0};
int i, i8 = in_size & ~8;
for (i = 0; i < i8; i+=8) {
F0[in[i+0]]++;
F1[in[i+1]]++;
F2[in[i+2]]++;
F3[in[i+3]]++;
F4[in[i+4]]++;
F5[in[i+5]]++;
F6[in[i+6]]++;
F7[in[i+7]]++;
}
while (i < in_size)
F0[in[i++]]++;
for (i = 0; i < 256; i++)
F0[i] += F1[i] + F2[i] + F3[i] + F4[i] + F5[i] + F6[i] + F7[i];
}
unsigned char *rans_compress_O0(unsigned char *in, unsigned int in_size,
unsigned int *out_size) {
int sz = ((int)(1.05*in_size + 257*257*3 + 8)) &~3;
unsigned char *out_buf = malloc(sz+4);
unsigned char *cp, *out_end;
RansEncSymbol syms[256];
RansState rans0, rans1, rans2, rans3;
uint8_t* ptr;
int F[256+MAGIC] = {0}, i, j, tab_size, rle, x, fsum = 0;
int m = 0, M = 0;
uint64_t tr;
if (!out_buf)
return NULL;
ptr = out_end = out_buf + sz;
// Compute statistics
hist8(in, in_size, F);
tr = ((uint64_t)TOTFREQ<<31)/in_size + (1<<30)/in_size;
// Normalise so T[i] == TOTFREQ
for (m = M = j = 0; j < 256; j++) {
if (!F[j])
continue;
if (m < F[j])
m = F[j], M = j;
if ((F[j] = (F[j]*tr)>>31) == 0)
F[j] = 1;
fsum += F[j];
}
fsum++;
if (fsum < TOTFREQ)
F[M] += TOTFREQ-fsum;
else
F[M] -= fsum-TOTFREQ;
//printf("F[%d]=%d\n", M, F[M]);
assert(F[M]>0);
// Encode statistics.
cp = out_buf+4;
for (x = rle = j = 0; j < 256; j++) {
if (F[j]) {
// j
if (rle) {
rle--;
} else {
*cp++ = j;
if (!rle && j && F[j-1]) {
for(rle=j+1; rle<256 && F[rle]; rle++)
;
rle -= j+1;
*cp++ = rle;
}
//fprintf(stderr, "%d: %d %d\n", j, rle, N[j]);
}
// F[j]
if (F[j]<128) {
*cp++ = F[j];
} else {
*cp++ = 128 | (F[j]>>8);
*cp++ = F[j]&0xff;
}
RansEncSymbolInit(&syms[j], x, F[j], TF_SHIFT);
x += F[j];
}
}
*cp++ = 0;
//write(1, out_buf+4, cp-(out_buf+4));
tab_size = cp-out_buf;
RansEncInit(&rans0);
RansEncInit(&rans1);
RansEncInit(&rans2);
RansEncInit(&rans3);
switch (i=(in_size&3)) {
case 3: RansEncPutSymbol(&rans2, (uint32_t **)&ptr, &syms[in[in_size-(i-2)]], TF_SHIFT);
case 2: RansEncPutSymbol(&rans1, (uint32_t **)&ptr, &syms[in[in_size-(i-1)]], TF_SHIFT);
case 1: RansEncPutSymbol(&rans0, (uint32_t **)&ptr, &syms[in[in_size-(i-0)]], TF_SHIFT);
case 0:
break;
}
for (i=(in_size &~3); i>0; i-=4) {
RansEncSymbol *s3 = &syms[in[i-1]];
RansEncSymbol *s2 = &syms[in[i-2]];
RansEncSymbol *s1 = &syms[in[i-3]];
RansEncSymbol *s0 = &syms[in[i-4]];
RansEncPutSymbol(&rans3, (uint32_t **)&ptr, s3, TF_SHIFT);
RansEncPutSymbol(&rans2, (uint32_t **)&ptr, s2, TF_SHIFT);
RansEncPutSymbol(&rans1, (uint32_t **)&ptr, s1, TF_SHIFT);
RansEncPutSymbol(&rans0, (uint32_t **)&ptr, s0, TF_SHIFT);
}
RansEncFlush(&rans3, (uint32_t **)&ptr);
RansEncFlush(&rans2, (uint32_t **)&ptr);
RansEncFlush(&rans1, (uint32_t **)&ptr);
RansEncFlush(&rans0, (uint32_t **)&ptr);
// Finalise block size and return it
*out_size = (out_end - ptr) + tab_size;
cp = out_buf;
*cp++ = (in_size>> 0) & 0xff;
*cp++ = (in_size>> 8) & 0xff;
*cp++ = (in_size>>16) & 0xff;
*cp++ = (in_size>>24) & 0xff;
memmove(out_buf + tab_size, ptr, out_end-ptr);
return out_buf;
}
typedef struct {
unsigned char R[TOTFREQ];
} ari_decoder;
unsigned char *rans_uncompress_O0(unsigned char *in, unsigned int in_size,
unsigned int *out_size) {
/* Load in the static tables */
unsigned char *cp = in + 4;
int i, j, x, out_sz, rle;
char *out_buf;
ari_decoder D;
RansDecSymbol syms[256];
out_sz = ((in[0])<<0) | ((in[1])<<8) | ((in[2])<<16) | ((in[3])<<24);
out_buf = malloc(out_sz);
if (!out_buf)
return NULL;
//fprintf(stderr, "out_sz=%d\n", out_sz);
// Precompute reverse lookup of frequency.
rle = x = 0;
j = *cp++;
do {
int F, C;
if ((F = *cp++) >= 128) {
F &= ~128;
F = ((F & 127) << 8) | *cp++;
}
C = x;
RansDecSymbolInit(&syms[j], C, F);
/* Build reverse lookup table */
//if (!D.R) D.R = (unsigned char *)malloc(TOTFREQ);
memset(&D.R[x], j, F);
x += F;
if (!rle && j+1 == *cp) {
j = *cp++;
rle = *cp++;
} else if (rle) {
rle--;
j++;
} else {
j = *cp++;
}
} while(j);
assert(x < TOTFREQ);
RansState rans0, rans1, rans2, rans3;
uint8_t *ptr = cp;
RansDecInit(&rans0, (uint32_t **)&ptr);
RansDecInit(&rans1, (uint32_t **)&ptr);
RansDecInit(&rans2, (uint32_t **)&ptr);
RansDecInit(&rans3, (uint32_t **)&ptr);
int out_end = (out_sz&~3);
RansState R[4];
R[0] = rans0;
R[1] = rans1;
R[2] = rans2;
R[3] = rans3;
uint32_t mask = (1u << TF_SHIFT)-1;
#if 0
for (i=0; i < out_end; i+=4) {
uint32_t m[4] = {R[0] & mask,
R[1] & mask,
R[2] & mask,
R[3] & mask};
uint8_t c[4] = {D.R[m[0]],
D.R[m[1]],
D.R[m[2]],
D.R[m[3]]};
out_buf[i+0] = c[0];
out_buf[i+1] = c[1];
out_buf[i+2] = c[2];
out_buf[i+3] = c[3];
// RansDecAdvanceSymbolStep(&R[0], &syms[c[0]], TF_SHIFT);
// RansDecAdvanceSymbolStep(&R[1], &syms[c[1]], TF_SHIFT);
// RansDecAdvanceSymbolStep(&R[2], &syms[c[2]], TF_SHIFT);
// RansDecAdvanceSymbolStep(&R[3], &syms[c[3]], TF_SHIFT);
R[0] = syms[c[0]].freq * (R[0]>>TF_SHIFT);
R[1] = syms[c[1]].freq * (R[1]>>TF_SHIFT);
R[2] = syms[c[2]].freq * (R[2]>>TF_SHIFT);
R[3] = syms[c[3]].freq * (R[3]>>TF_SHIFT);
R[0] += m[0] - syms[c[0]].start;
R[1] += m[1] - syms[c[1]].start;
R[2] += m[2] - syms[c[2]].start;
R[3] += m[3] - syms[c[3]].start;
RansDecRenorm(&R[0], (uint32_t **)&ptr);
RansDecRenorm(&R[1], (uint32_t **)&ptr);
RansDecRenorm(&R[2], (uint32_t **)&ptr);
RansDecRenorm(&R[3], (uint32_t **)&ptr);
}
#else
for (i=0; i < out_end; i+=4) {
uint32_t m[4];
uint8_t c[4];
out_buf[i+0] = c[0] = D.R[m[0] = R[0] & mask];
R[0] = syms[c[0]].freq * (R[0]>>TF_SHIFT);
R[0] += m[0] - syms[c[0]].start;
out_buf[i+1] = c[1] = D.R[m[1] = R[1] & mask];
R[1] = syms[c[1]].freq * (R[1]>>TF_SHIFT);
R[1] += m[1] - syms[c[1]].start;
out_buf[i+2] = c[2] = D.R[m[2] = R[2] & mask];
R[2] = syms[c[2]].freq * (R[2]>>TF_SHIFT);
R[2] += m[2] - syms[c[2]].start;
out_buf[i+3] = c[3] = D.R[m[3] = R[3] & mask];
R[3] = syms[c[3]].freq * (R[3]>>TF_SHIFT);
R[3] += m[3] - syms[c[3]].start;
RansDecRenorm(&R[0], (uint32_t **)&ptr);
RansDecRenorm(&R[1], (uint32_t **)&ptr);
RansDecRenorm(&R[2], (uint32_t **)&ptr);
RansDecRenorm(&R[3], (uint32_t **)&ptr);
}
#endif
rans0 = R[0];
rans1 = R[1];
rans2 = R[2];
rans3 = R[3];
switch(out_sz&3) {
unsigned char c;
case 0:
break;
case 1:
c = D.R[RansDecGet(&rans0, TF_SHIFT)];
RansDecAdvanceSymbol(&rans0, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end] = c;
break;
case 2:
c = D.R[RansDecGet(&rans0, TF_SHIFT)];
RansDecAdvanceSymbol(&rans0, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end] = c;
c = D.R[RansDecGet(&rans1, TF_SHIFT)];
RansDecAdvanceSymbol(&rans1, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end+1] = c;
break;
case 3:
c = D.R[RansDecGet(&rans0, TF_SHIFT)];
RansDecAdvanceSymbol(&rans0, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end] = c;
c = D.R[RansDecGet(&rans1, TF_SHIFT)];
RansDecAdvanceSymbol(&rans1, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end+1] = c;
c = D.R[RansDecGet(&rans2, TF_SHIFT)];
RansDecAdvanceSymbol(&rans2, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end+2] = c;
break;
}
*out_size = out_sz;
//if (D.R) free(D.R);
return (unsigned char *)out_buf;
}
unsigned char *rans_uncompress_O0b(unsigned char *in, unsigned int in_size,
unsigned int *out_size) {
/* Load in the static tables */
unsigned char *cp = in + 4;
int i, j, x, out_sz, rle;
char *out_buf;
ari_decoder D;
RansDecSymbol syms[256];
out_sz = ((in[0])<<0) | ((in[1])<<8) | ((in[2])<<16) | ((in[3])<<24);
out_buf = malloc(out_sz);
if (!out_buf)
return NULL;
//fprintf(stderr, "out_sz=%d\n", out_sz);
// Precompute reverse lookup of frequency.
rle = x = 0;
j = *cp++;
do {
int F, C;
if ((F = *cp++) >= 128) {
F &= ~128;
F = ((F & 127) << 8) | *cp++;
}
C = x;
RansDecSymbolInit(&syms[j], C, F);
/* Build reverse lookup table */
//if (!D.R) D.R = (unsigned char *)malloc(TOTFREQ);
memset(&D.R[x], j, F);
x += F;
// Alternative to the memset and x+=F above: ~0.4% speed overall.
if (0){
int z = x+F;
uint32_t i4 = (j<<24)|(j<<16)|(j<<8)|j;
while (x+4<z) {
*((uint32_t *)&D.R[x])=i4;
x+=4;
}
while (x<z) D.R[x++]=j;
}
if (!rle && j+1 == *cp) {
j = *cp++;
rle = *cp++;
} else if (rle) {
rle--;
j++;
} else {
j = *cp++;
}
} while(j);
assert(x < TOTFREQ);
RansState rans0, rans1, rans2, rans3;
uint8_t *ptr = cp;
RansDecInit(&rans0, (uint32_t **)&ptr);
RansDecInit(&rans1, (uint32_t **)&ptr);
RansDecInit(&rans2, (uint32_t **)&ptr);
RansDecInit(&rans3, (uint32_t **)&ptr);
int out_end = (out_sz&~3);
RansState R[4];
R[0] = rans0;
R[1] = rans1;
R[2] = rans2;
R[3] = rans3;
uint32_t mask = (1u << TF_SHIFT)-1;
for (i=0; i < out_end; i+=4) {
uint32_t m[4] = {R[0] & mask,
R[1] & mask,
R[2] & mask,
R[3] & mask};
uint8_t c[4] = {D.R[m[0]],
D.R[m[1]],
D.R[m[2]],
D.R[m[3]]};
out_buf[i+0] = c[0];
out_buf[i+1] = c[1];
out_buf[i+2] = c[2];
out_buf[i+3] = c[3];
// RansDecAdvanceSymbolStep(&R[0], &syms[c[0]], TF_SHIFT);
// RansDecAdvanceSymbolStep(&R[1], &syms[c[1]], TF_SHIFT);
// RansDecAdvanceSymbolStep(&R[2], &syms[c[2]], TF_SHIFT);
// RansDecAdvanceSymbolStep(&R[3], &syms[c[3]], TF_SHIFT);
R[0] = syms[c[0]].freq * (R[0]>>TF_SHIFT);
R[0] += m[0] - syms[c[0]].start;
R[1] = syms[c[1]].freq * (R[1]>>TF_SHIFT);
R[1] += m[1] - syms[c[1]].start;
R[2] = syms[c[2]].freq * (R[2]>>TF_SHIFT);
R[2] += m[2] - syms[c[2]].start;
R[3] = syms[c[3]].freq * (R[3]>>TF_SHIFT);
R[3] += m[3] - syms[c[3]].start;
RansDecRenorm(&R[0], (uint32_t **)&ptr);
RansDecRenorm(&R[1], (uint32_t **)&ptr);
RansDecRenorm(&R[2], (uint32_t **)&ptr);
RansDecRenorm(&R[3], (uint32_t **)&ptr);
}
rans0 = R[0];
rans1 = R[1];
rans2 = R[2];
rans3 = R[3];
switch(out_sz&3) {
unsigned char c;
case 0:
break;
case 1:
c = D.R[RansDecGet(&rans0, TF_SHIFT)];
RansDecAdvanceSymbol(&rans0, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end] = c;
break;
case 2:
c = D.R[RansDecGet(&rans0, TF_SHIFT)];
RansDecAdvanceSymbol(&rans0, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end] = c;
c = D.R[RansDecGet(&rans1, TF_SHIFT)];
RansDecAdvanceSymbol(&rans1, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end+1] = c;
break;
case 3:
c = D.R[RansDecGet(&rans0, TF_SHIFT)];
RansDecAdvanceSymbol(&rans0, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end] = c;
c = D.R[RansDecGet(&rans1, TF_SHIFT)];
RansDecAdvanceSymbol(&rans1, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end+1] = c;
c = D.R[RansDecGet(&rans2, TF_SHIFT)];
RansDecAdvanceSymbol(&rans2, (uint32_t **)&ptr, &syms[c], TF_SHIFT);
out_buf[out_end+2] = c;
break;
}
*out_size = out_sz;
//if (D.R) free(D.R);
return (unsigned char *)out_buf;
}
static void hist1_4(unsigned char *in, unsigned int in_size,
int F0[256][256], int *T0) {
int T1[256+MAGIC] = {0}, T2[256+MAGIC] = {0}, T3[256+MAGIC] = {0};
unsigned int idiv4 = in_size/4;
int i;
unsigned char c0, c1, c2, c3;
unsigned char *in0 = in + 0;
unsigned char *in1 = in + idiv4;
unsigned char *in2 = in + idiv4*2;
unsigned char *in3 = in + idiv4*3;
unsigned char last_0 = 0, last_1 = in1[-1], last_2 = in2[-1], last_3 = in3[-1];
//unsigned char last_0 = 0, last_1 = 0, last_2 = 0, last_3 = 0;
unsigned char *in0_end = in1;
while (in0 < in0_end) {
F0[last_0][c0 = *in0++]++;
T0[last_0]++;
last_0 = c0;
F0[last_1][c1 = *in1++]++;
T1[last_1]++;
last_1 = c1;
F0[last_2][c2 = *in2++]++;
T2[last_2]++;
last_2 = c2;
F0[last_3][c3 = *in3++]++;
T3[last_3]++;
last_3 = c3;
}
while (in3 < in + in_size) {
F0[last_3][c3 = *in3++]++;
T3[last_3]++;
last_3 = c3;
}
for (i = 0; i < 256; i++) {
T0[i]+=T1[i]+T2[i]+T3[i];
}
}
unsigned char *rans_compress_O1(unsigned char *in, unsigned int in_size,
unsigned int *out_size) {
unsigned char *out_buf = malloc(1.05*in_size + 257*257*3 + 4);
unsigned char *cp = out_buf, *out_end;
unsigned int tab_size, rle_i, rle_j;
RansEncSymbol syms[256][256];
if (!out_buf)
return NULL;
out_end = out_buf + (int)(1.05*in_size) + 257*257*3 + 4;
cp = out_buf+4;
int F[256][256] = {0}, T[256+MAGIC] = {0}, i, j;
//memset(F, 0, 256*256*sizeof(int));
//memset(T, 0, 256*sizeof(int));
hist1_4(in, in_size, F, T);
F[0][in[1*(in_size>>2)]]++;
F[0][in[2*(in_size>>2)]]++;
F[0][in[3*(in_size>>2)]]++;
T[0]+=3;
// Normalise so T[i] == TOTFREQ
for (rle_i = i = 0; i < 256; i++) {
int t2, m, M;
unsigned int x;
if (T[i] == 0)
continue;
//uint64_t p = (TOTFREQ * TOTFREQ) / t;
double p = ((double)TOTFREQ)/T[i];
for (t2 = m = M = j = 0; j < 256; j++) {
if (!F[i][j])
continue;
if (m < F[i][j])
m = F[i][j], M = j;
//if ((F[i][j] = (F[i][j] * p) / TOTFREQ) == 0)
if ((F[i][j] *= p) == 0)
F[i][j] = 1;
t2 += F[i][j];
}
t2++;
if (t2 < TOTFREQ)
F[i][M] += TOTFREQ-t2;
else
F[i][M] -= t2-TOTFREQ;
// Store frequency table
// i
if (rle_i) {
rle_i--;
} else {
*cp++ = i;
// FIXME: could use order-0 statistics to observe which alphabet
// symbols are present and base RLE on that ordering instead.
if (i && T[i-1]) {
for(rle_i=i+1; rle_i<256 && T[rle_i]; rle_i++)
;
rle_i -= i+1;
*cp++ = rle_i;
}
}
int *F_i_ = F[i];
x = 0;
rle_j = 0;
for (j = 0; j < 256; j++) {
if (F_i_[j]) {
//fprintf(stderr, "F[%d][%d]=%d, x=%d\n", i, j, F_i_[j], x);
// j
if (rle_j) {
rle_j--;
} else {
*cp++ = j;
if (!rle_j && j && F_i_[j-1]) {
for(rle_j=j+1; rle_j<256 && F_i_[rle_j]; rle_j++)
;
rle_j -= j+1;
*cp++ = rle_j;
}
}
// F_i_[j]
if (F_i_[j]<128) {
*cp++ = F_i_[j];
} else {
*cp++ = 128 | (F_i_[j]>>8);
*cp++ = F_i_[j]&0xff;
}
RansEncSymbolInit(&syms[i][j], x, F_i_[j], TF_SHIFT);
x += F_i_[j];
}
}
*cp++ = 0;
}
*cp++ = 0;
//write(1, out_buf+4, cp-(out_buf+4));
tab_size = cp - out_buf;
assert(tab_size < 257*257*3);
RansState rans0, rans1, rans2, rans3;
RansEncInit(&rans0);
RansEncInit(&rans1);
RansEncInit(&rans2);
RansEncInit(&rans3);
uint8_t* ptr = out_end;
int isz4 = in_size>>2;
int i0 = 1*isz4-2;
int i1 = 2*isz4-2;
int i2 = 3*isz4-2;
int i3 = 4*isz4-2;
unsigned char l0 = in[i0+1];
unsigned char l1 = in[i1+1];
unsigned char l2 = in[i2+1];
unsigned char l3 = in[i3+1];
// Deal with the remainder
l3 = in[in_size-1];
for (i3 = in_size-2; i3 > 4*isz4-2; i3--) {
unsigned char c3 = in[i3];
RansEncPutSymbol(&rans3, (uint32_t **)&ptr, &syms[c3][l3], TF_SHIFT);
l3 = c3;
}
for (; i0 >= 0; i0--, i1--, i2--, i3--) {
unsigned char c0, c1, c2, c3;
RansEncSymbol *s3 = &syms[c3 = in[i3]][l3];
RansEncSymbol *s2 = &syms[c2 = in[i2]][l2];
RansEncSymbol *s1 = &syms[c1 = in[i1]][l1];
RansEncSymbol *s0 = &syms[c0 = in[i0]][l0];
RansEncPutSymbol(&rans3, (uint32_t **)&ptr, s3, TF_SHIFT);
RansEncPutSymbol(&rans2, (uint32_t **)&ptr, s2, TF_SHIFT);
RansEncPutSymbol(&rans1, (uint32_t **)&ptr, s1, TF_SHIFT);
RansEncPutSymbol(&rans0, (uint32_t **)&ptr, s0, TF_SHIFT);
l0 = c0;
l1 = c1;
l2 = c2;
l3 = c3;
}
RansEncPutSymbol(&rans3, (uint32_t **)&ptr, &syms[0][l3], TF_SHIFT);
RansEncPutSymbol(&rans2, (uint32_t **)&ptr, &syms[0][l2], TF_SHIFT);
RansEncPutSymbol(&rans1, (uint32_t **)&ptr, &syms[0][l1], TF_SHIFT);
RansEncPutSymbol(&rans0, (uint32_t **)&ptr, &syms[0][l0], TF_SHIFT);
RansEncFlush(&rans3, (uint32_t **)&ptr);
RansEncFlush(&rans2, (uint32_t **)&ptr);
RansEncFlush(&rans1, (uint32_t **)&ptr);
RansEncFlush(&rans0, (uint32_t **)&ptr);
*out_size = (out_end - ptr) + tab_size;
cp = out_buf;
*cp++ = (in_size>> 0) & 0xff;
*cp++ = (in_size>> 8) & 0xff;
*cp++ = (in_size>>16) & 0xff;
*cp++ = (in_size>>24) & 0xff;
memmove(out_buf + tab_size, ptr, out_end-ptr);
return out_buf;
}
unsigned char *rans_uncompress_O1(unsigned char *in, unsigned int in_size,
unsigned int *out_size) {
/* Load in the static tables */
unsigned char *cp = in + 4;
int i, j = -999, x, out_sz, rle_i, rle_j;
char *out_buf;
ari_decoder D[256];
RansDecSymbol syms[256][256];
//memset(D, 0, 256*sizeof(*D));
out_sz = ((in[0])<<0) | ((in[1])<<8) | ((in[2])<<16) | ((in[3])<<24);
out_buf = malloc(out_sz);
if (!out_buf)
return NULL;
//fprintf(stderr, "out_sz=%d\n", out_sz);
//i = *cp++;
rle_i = 0;
i = *cp++;
do {
rle_j = x = 0;
j = *cp++;
do {
int F, C;
if ((F = *cp++) >= 128) {
F &= ~128;
F = ((F & 127) << 8) | *cp++;
}
C = x;
//fprintf(stderr, "i=%d j=%d F=%d C=%d\n", i, j, D[i].F[j], D[i].C[j]);
if (!F)
F = TOTFREQ;
RansDecSymbolInit(&syms[i][j], C, F);
/* Build reverse lookup table */
//if (!D[i].R) D[i].R = (unsigned char *)malloc(TOTFREQ);
memset(&D[i].R[x], j, F);
x += F;
assert(x <= TOTFREQ);
if (!rle_j && j+1 == *cp) {
j = *cp++;
rle_j = *cp++;
} else if (rle_j) {
rle_j--;
j++;
} else {
j = *cp++;
}
} while(j);
if (!rle_i && i+1 == *cp) {
i = *cp++;
rle_i = *cp++;
} else if (rle_i) {
rle_i--;
i++;
} else {
i = *cp++;
}
} while (i);
// Precompute reverse lookup of frequency.
RansState rans0, rans1, rans2, rans3;
uint8_t *ptr = cp;
RansDecInit(&rans0, (uint32_t **)&ptr);
RansDecInit(&rans1, (uint32_t **)&ptr);
RansDecInit(&rans2, (uint32_t **)&ptr);
RansDecInit(&rans3, (uint32_t **)&ptr);
int isz4 = out_sz>>2;
int l0 = 0;
int l1 = 0;
int l2 = 0;
int l3 = 0;
int i4[] = {0*isz4, 1*isz4, 2*isz4, 3*isz4};
RansState R[4];
R[0] = rans0;
R[1] = rans1;
R[2] = rans2;
R[3] = rans3;
for (; i4[0] < isz4; i4[0]++, i4[1]++, i4[2]++, i4[3]++) {
uint32_t m[4] = {R[0] & ((1u << TF_SHIFT)-1),
R[1] & ((1u << TF_SHIFT)-1),
R[2] & ((1u << TF_SHIFT)-1),
R[3] & ((1u << TF_SHIFT)-1)};
uint8_t c[4] = {D[l0].R[m[0]],
D[l1].R[m[1]],
D[l2].R[m[2]],
D[l3].R[m[3]]};
out_buf[i4[0]] = c[0];
out_buf[i4[1]] = c[1];
out_buf[i4[2]] = c[2];
out_buf[i4[3]] = c[3];
//RansDecAdvanceSymbolStep(&R[0], &syms[l0][c[0]], TF_SHIFT);
//RansDecAdvanceSymbolStep(&R[1], &syms[l1][c[1]], TF_SHIFT);
//RansDecAdvanceSymbolStep(&R[2], &syms[l2][c[2]], TF_SHIFT);
//RansDecAdvanceSymbolStep(&R[3], &syms[l3][c[3]], TF_SHIFT);
R[0] = syms[l0][c[0]].freq * (R[0]>>TF_SHIFT);
R[1] = syms[l1][c[1]].freq * (R[1]>>TF_SHIFT);
R[2] = syms[l2][c[2]].freq * (R[2]>>TF_SHIFT);
R[3] = syms[l3][c[3]].freq * (R[3]>>TF_SHIFT);
R[0] += m[0] - syms[l0][c[0]].start;
R[1] += m[1] - syms[l1][c[1]].start;
R[2] += m[2] - syms[l2][c[2]].start;
R[3] += m[3] - syms[l3][c[3]].start;
RansDecRenorm(&R[0], (uint32_t **)&ptr);
RansDecRenorm(&R[1], (uint32_t **)&ptr);
RansDecRenorm(&R[2], (uint32_t **)&ptr);
RansDecRenorm(&R[3], (uint32_t **)&ptr);
l0 = c[0];
l1 = c[1];
l2 = c[2];
l3 = c[3];
}
rans0 = R[0];
rans1 = R[1];
rans2 = R[2];
rans3 = R[3];
// Remainder
for (; i4[3] < out_sz; i4[3]++) {
unsigned char c3 = D[l3].R[RansDecGet(&rans3, TF_SHIFT)];
out_buf[i4[3]] = c3;
RansDecAdvanceSymbol(&rans3, (uint32_t **)&ptr, &syms[l3][c3], TF_SHIFT);
l3 = c3;
}
*out_size = out_sz;
// for (i = 0; i < 256; i++)
// if (D[i].R) free(D[i].R);
return (unsigned char *)out_buf;
}
unsigned char *rans_uncompress_O1b(unsigned char *in, unsigned int in_size,
unsigned int *out_size) {
/* Load in the static tables */
unsigned char *cp = in + 4;
int i, j = -999, x, out_sz, rle_i, rle_j;
char *out_buf;
ari_decoder D[256];
RansDecSymbol syms[256][256];
//memset(D, 0, 256*sizeof(*D));
out_sz = ((in[0])<<0) | ((in[1])<<8) | ((in[2])<<16) | ((in[3])<<24);
out_buf = malloc(out_sz);
if (!out_buf)
return NULL;
//fprintf(stderr, "out_sz=%d\n", out_sz);
//i = *cp++;
rle_i = 0;
i = *cp++;
do {
rle_j = x = 0;
j = *cp++;
do {
int F, C;
if ((F = *cp++) >= 128) {
F &= ~128;
F = ((F & 127) << 8) | *cp++;
}
C = x;
//fprintf(stderr, "i=%d j=%d F=%d C=%d\n", i, j, D[i].F[j], D[i].C[j]);
if (!F)
F = TOTFREQ;
RansDecSymbolInit(&syms[i][j], C, F);
/* Build reverse lookup table */
//if (!D[i].R) D[i].R = (unsigned char *)malloc(TOTFREQ);
memset(&D[i].R[x], j, F);
x += F;
assert(x <= TOTFREQ);
if (!rle_j && j+1 == *cp) {
j = *cp++;
rle_j = *cp++;
} else if (rle_j) {
rle_j--;
j++;
} else {
j = *cp++;
}
} while(j);
if (!rle_i && i+1 == *cp) {
i = *cp++;
rle_i = *cp++;
} else if (rle_i) {
rle_i--;
i++;
} else {
i = *cp++;
}
} while (i);
// Precompute reverse lookup of frequency.
RansState rans0, rans1, rans2, rans3;
uint8_t *ptr = cp;
RansDecInit(&rans0, (uint32_t **)&ptr);
RansDecInit(&rans1, (uint32_t **)&ptr);
RansDecInit(&rans2, (uint32_t **)&ptr);
RansDecInit(&rans3, (uint32_t **)&ptr);
int isz4 = out_sz>>2;
int l0 = 0;
int l1 = 0;
int l2 = 0;
int l3 = 0;
int i4[] = {0*isz4, 1*isz4, 2*isz4, 3*isz4};
RansState R[4];
R[0] = rans0;
R[1] = rans1;
R[2] = rans2;
R[3] = rans3;
for (; i4[0] < isz4; i4[0]++, i4[1]++, i4[2]++, i4[3]++) {
uint32_t m[4] = {R[0] & ((1u << TF_SHIFT)-1),
R[1] & ((1u << TF_SHIFT)-1),