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libxpng.c
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#include "xpng.h"
static_assert(T_MAX >= 0);
#define RGB 3
#define RGBA 4
#define BITSTREAM_WRITE(b, C, B) b.bc = (b.bc << (C)) | (B), b.l += (C)
#define BITSTREAM_READ(b, C) ((b.bc >> (b.l -= (C))) & BITMASK(C))
#define BITSTREAM_FLUSH(b) if (b.l >= 32) *(b._p)++ = b.bc >> (b.l -= 32)
#define BITSTREAM_END(b) if (b.l > 0) *(b._p)++ = b.bc << (32 - b.l)
#define BITSTREAM_FILL(b) if (b.l < 32) { b.bc <<= 32, b.l += 32; if (b._p < b.DP) b.bc += *(b._p)++; }
#define BC(C, B) b->bc = (b->bc << (C)) + (B), b->l += (C)
#define BCF(C) ((b->bc >> (b->l -= (C))) & BITMASK(C))
#define FILL if (b->l < 32) { b->bc <<= 32, b->l += 32; if (b->_p < b->DP) b->bc += *(b->_p)++; }
#define FLUSH if (b->l >= 32) *(b->_p)++ = b->bc >> (b->l -= 32)
#define numBit(v) ((1 + (__builtin_clz(v) ^ 31)) & (-(v) >> 31))
#define pix_toU fin(3) { pix[i] = (s7_t)pix[i]; pix[i] = (pix[i] << 1) ^ (pix[i] >> 31); }
#define pix_toS fin(3) pix[i] = (pix[i] >> 1) ^ (-(pix[i] & 1));
#define pix_copy(to, from) fin(3) to[i] = from[i];
#define p1x_(pxsz) p[i - pxsz]
#define p1y_(pxsz) p[i - bpr]
#define p1x(operator) fin(3) pix[i] = pix[i] operator p1x_(RGB);
#define p1y(operator) fin(3) pix[i] = pix[i] operator p[i - bpr];
#define p2a_(pxsz) ((p[i - pxsz] + p[i - bpr] + 1) >> 1)
#define p2a(operator) fin(3) pix[i] = pix[i] operator p2a_(RGB);
#define p3a_(pxsz) ((((3 * p[i - pxsz] + 3 * p[i - bpr]) - 2 * p[(i - bpr) - pxsz]) + 2) >> 2)
#define p3a(operator) fin(3) pix[i] = pix[i] operator p3a_(RGB)
#define numB(from) nl = from[0] | from[1] | from[2]; nl = numBit(nl);
#define ENC_ \
pix_toU; numB(pix); F[0][(pl << 4) + nl]++, pl = *cx[pl]++ = nl; \
switch (nl) { \
case 0: break; \
case 1: F[1][*st[1]++ = (pix[0] << 2) | (pix[1] << 1) | pix[2]]++; break; \
case 2: F[2][*st[2]++ = (pix[0] << 4) | (pix[1] << 2) | pix[2]]++; break; \
default: fin(3) F[nl][*st[nl]++ = pix[i]]++; \
} p += RGB;
#define ENC(pr) pix_copy(pix, p); pr(-); ENC_
#define ENC4 \
pix_copy(pix, p); if (Y) p3a(-); else p2a(-); \
if (G) pix[0] -= pix[1], pix[2] -= pix[1]; ENC_
typedef struct task_t { u8_t *p, *f; u64_t w, h; } task_t;
typedef struct data_t { PTHSPT sp; task_t *t, *t_end; s63_t PXSZ, bpr; } data_t;
#define TILE (444 * 444)
NOINLINE static task_t* compute_props_of_each_tile(u64_t *N, const xpng_t *pm) {
task_t *r, *t; const u8_t *p = pm->p;
const s63_t PXSZ = 3 + pm->A, bpr = pm->w * PXSZ;
u64_t w0, w1, w, h0, h1, h, Nw, Nh;
if (pm->s <= TILE * PXSZ) Nw = Nh = 1, w0 = pm->w, h0 = pm->h; else {
if (pm->w < 444) w1 = w = pm->w, h1 = h = TILE / w;
else if (pm->h < 444) h1 = h = pm->h, w1 = w = TILE / h;
else w1 = w = h1 = h = 444;
u64_t _w = w / 2, _h = h / 2, r;
Nw = pm->w / w, w0 = w + (r = pm->w % w); if (r > _w) Nw++, w0 = (w1 = w0 / 2) + (w0 & 1);
Nh = pm->h / h, h0 = h + (r = pm->h % h); if (r > _h) Nh++, h0 = (h1 = h0 / 2) + (h0 & 1);
}
MALLOC(r = t, sizeof(task_t) * (*N = Nw * Nh)) ret t;
fin(Nh) {
fiN(j, Nw) {
t->w = (j == 0) ? w0 : (j == 1 ? w1 : w);
t->h = (i == 0) ? h0 : (i == 1 ? h1 : h);
t->p = (u8_t *)p; p += t->w * PXSZ;
t++;
}
p = pm->p + h0 * bpr + (i > 0 ? h1 * bpr + h * bpr * (i - 1) : 0);
}
ret r;
}
#define STEP 4
static_assert(STEP >= 2);
#define PP_RGBX(s) \
fin(3) { pix##s[i] = (s7_t)pix##s[i]; pix##s[i] = (pix##s[i] << 1) ^ (pix##s[i] >> 31); } \
n##s = pix##s[0] | pix##s[1] | pix##s[2]; F##s += numBit(n##s);
NOINLINE static u64_t pp_rgbx(const task_t *t, const s63_t bpr, const s63_t PXSZ) {
if (t->w < STEP || t->h < STEP) ret 0;
u32_t F1 = 0, F2 = 0, F3 = 0, F4 = 0;
const s63_t BPR = bpr * STEP, w = (t->w - t->w % STEP) * PXSZ, W = BPR - w;
const u8_t *p = t->p + (BPR - bpr) + (STEP - 1) * PXSZ,
*const P = p + BPR * (t->h / STEP),
*L = p + w;
s31_t pix1[3], pix2[3], pix3[3], pix4[3], n1, n2, n3, n4;
if (PXSZ == 3) {
for (; p != P; L += BPR, p += W) {
for (; p != L; p += STEP * RGB) {
fin(3)
pix2[i] = pix1[i] = p[i] - p2a_(RGB),
pix4[i] = pix3[i] = p[i] - p3a_(RGB);
pix2[0] -= pix2[1], pix2[2] -= pix2[1];
pix4[0] -= pix4[1], pix4[2] -= pix4[1];
PP_RGBX(1); PP_RGBX(2); PP_RGBX(3); PP_RGBX(4);
}
}
} else {
for (; p != P; L += BPR, p += W) {
for (; p != L; p += STEP * RGBA) {
if (p[3] == 0) continue;
fin(3)
pix2[i] = pix1[i] = p[i] - p2a_(RGBA),
pix4[i] = pix3[i] = p[i] - p3a_(RGBA);
pix2[0] -= pix2[1], pix2[2] -= pix2[1];
pix4[0] -= pix4[1], pix4[2] -= pix4[1];
PP_RGBX(1); PP_RGBX(2); PP_RGBX(3); PP_RGBX(4);
}
}
}
u64_t m = 0, r = F1;
if (F2 < r) m = 1, r = F2;
if (F3 < r) m = 2, r = F3;
if (F4 < r) m = 3, r = F4;
ret (PXSZ & 4) | m;
}
#undef PP_RGBX
#undef STEP
typedef struct bitstream_t { u64_t bc; u32_t l, *_p, *DP; } bitstream_t;
#define N_INIT u64_t N; task_t *t = compute_props_of_each_tile(&N, pm); \
if (t == NULL) ret 1; if (T == 0) T = sysconf(_SC_NPROCESSORS_ONLN); if (N < T) T = N; \
data_t d = { .t = t, .t_end = t + N, \
.PXSZ = 3 + pm->A, .bpr = (RGB + pm->A) * pm->w }; PTHSPI(&d.sp);
#define GET_TASK PTHSPL(&d->sp); \
if (d->t == d->t_end) { PTHSPU(&d->sp); goto e; } t = d->t++; PTHSPU(&d->sp);
#define RANS64_L (1UL << 31)
typedef struct Rans64EncSymbol {
u64_t rcp_freq;
u32_t freq, bias, cmpl_freq, rcp_shift;
} Rans64EncSymbol;
static void compress_block(u32_t *F, const u64_t N, u8_t **st, const u64_t st_size,
u8_t **_res, bitstream_t *b, const int PROB_BITS) {
unless (BETWEEN(10, PROB_BITS, 15)) exit(1);
const u64_t PROB_SCALE = (1UL << PROB_BITS);
const u64_t nBit = numBit((int)(N - 1));
u32_t s = 0, cum[N + 1], *res = (u32_t *)*_res; cum[0] = 0;
if (st_size == 0) { *_res = *st = (u8_t *)(--res), *res = 4; return; }
fin(N) cum[i + 1] = cum[i] + F[i], s += (_Bool)F[i];
if (s == 1) {
*(--res) = st_size + (*(*st - 1) << 24),
*_res = *st = (u8_t *)(--res), *res = 8 + (1 << 24); return;
}
fix(1, N + 1, 1) cum[i] = (cum[i] * PROB_SCALE) / st_size;
fin(N) {
if (F[i] && cum[i + 1] == cum[i]) {
u32_t m = ~0u, best_steal, f;
fiN(j, N) { f = cum[j + 1] - cum[j]; if (f > 1 && f < m) m = f, best_steal = j; }
if (best_steal < i) fiX(j, best_steal + 1, i + 1, 1) cum[j]--;
else fiX(j, i + 1, best_steal + 1, 1) cum[j]++;
}
}
fin(N) F[i] = cum[i + 1] - cum[i];
Rans64EncSymbol e[N]; fin(N) {
e[i].freq = F[i];
e[i].cmpl_freq = (1 << PROB_BITS) - F[i];
if (F[i] < 2) {
e[i].rcp_freq = ~0UL;
e[i].rcp_shift = 0;
e[i].bias = cum[i] + ((1 << PROB_BITS) - 1);
} else {
u32_t shift = 0; while (F[i] > (1u << shift)) shift++;
u64_t x0, x1, t0, t1;
x0 = F[i] - 1;
x1 = 1UL << (shift + 31);
t1 = x1 / F[i];
x0 += (x1 % F[i]) << 32;
t0 = x0 / F[i];
e[i].rcp_freq = t0 + (t1 << 32);
e[i].rcp_shift = shift - 1;
e[i].bias = cum[i];
}
}
const u8_t *x = *st, *const X = x - st_size;
u64_t state0 = RANS64_L, state1 = RANS64_L;
if (st_size & 1) {
const Rans64EncSymbol *const sym0 = e + *(--x);
u64_t q0 = (uint64_t)(((unsigned __int128)state0 * sym0->rcp_freq) >> 64);
state0 += sym0->bias + (q0 >> sym0->rcp_shift) * sym0->cmpl_freq;
}
for (x -= 2; x >= X; x -= 2) {
const Rans64EncSymbol *const sym1 = e + x[1];
const Rans64EncSymbol *const sym0 = e + x[0];
if (state1 >= ((RANS64_L >> PROB_BITS) << 32) * sym1->freq)
*(--res) = (u32_t)state1, state1 >>= 32;
if (state0 >= ((RANS64_L >> PROB_BITS) << 32) * sym0->freq)
*(--res) = (u32_t)state0, state0 >>= 32;
u64_t q1 = (uint64_t)(((unsigned __int128)state1 * sym1->rcp_freq) >> 64);
state1 += sym1->bias + (q1 >> sym1->rcp_shift) * sym1->cmpl_freq;
u64_t q0 = (uint64_t)(((unsigned __int128)state0 * sym0->rcp_freq) >> 64);
state0 += sym0->bias + (q0 >> sym0->rcp_shift) * sym0->cmpl_freq;
}
*(u64_t *)(res -= 2) = state1, *(u64_t *)(res -= 2) = state0;
u32_t tab_size = (N - s) + s * (PROB_BITS + 1);
_Bool compr_tab = tab_size < N * PROB_BITS; tab_size = compr_tab ? tab_size : N * PROB_BITS;
if (tab_size + 8 * (*_res - (u8_t *)res) >= nBit * st_size) {
for (u8_t *X = *st, *x = X - st_size; x < X; x++) { BC(nBit, *x); FLUSH; }
res = (u32_t *)*_res, *(--res) = st_size,
*_res = *st = (u8_t *)(--res), *res = 8 + (2 << 24); return;
}
if (compr_tab) fin(N) { if (F[i]) BC(PROB_BITS + 1, F[i] + PROB_SCALE); else BC(1, 0); FLUSH; }
else fin(N) { BC(PROB_BITS, F[i]); FLUSH; }
*(--res) = st_size, *st = (u8_t *)(--res),
*res = (*_res - (u8_t *)res) + ((3 + compr_tab) << 24), *_res = (u8_t *)res;
}
static void decompress_block(const u8_t *f, const u64_t N, u8_t *x,
bitstream_t *b, const int PROB_BITS) {
unless (BETWEEN(10, PROB_BITS, 15)) exit(1);
const u64_t PROB_SCALE = (1UL << PROB_BITS);
const u64_t nBit = numBit((int)(N - 1));
const u32_t *res = (u32_t *)f,
*const R = (u32_t *)(f + (*res & BITMASK(24))), type = *res++ >> 24;
switch (type) {
case 1: memset(x, *res >> 24, *res & BITMASK(24)); ret;
case 2: fin(*res) { FILL; x[i] = BCF(nBit); } ret;
case 3:
case 4: break;
default: ret;
}
u32_t st_size = *res++, F[N], cum[N + 1]; cum[0] = 0;
if (type == 3) fin(N) { FILL; F[i] = BCF(PROB_BITS); }
else fin(N) { FILL; if ((F[i] = BCF(1))) F[i] = BCF(PROB_BITS); }
fin(N) cum[i + 1] = cum[i] + F[i];
u8_t cum2sym[PROB_SCALE]; fin(N) memset(cum2sym + cum[i], i, F[i]);
if (res + 4 > R) ret; u64_t state0 = *(u64_t *)res, state1 = *(u64_t *)(res + 2); res += 4;
for (u8_t *const X = x + (st_size & ~1u); x < X; x += 2) {
x[0] = cum2sym[state0 & BITMASK(PROB_BITS)];
x[1] = cum2sym[state1 & BITMASK(PROB_BITS)];
state0 = (F[x[0]] * (state0 >> PROB_BITS) + (state0 & BITMASK(PROB_BITS))) - cum[x[0]];
state1 = (F[x[1]] * (state1 >> PROB_BITS) + (state1 & BITMASK(PROB_BITS))) - cum[x[1]];
if (state0 < RANS64_L) { state0 = (state0 << 32) | *res; if (res < R) res++; }
if (state1 < RANS64_L) { state1 = (state1 << 32) | *res; if (res < R) res++; }
}
if (st_size & 1) *x = cum2sym[state0 & BITMASK(PROB_BITS)];
}
static inline u64_t bitstream_dword_aligned(const u64_t num_bits) {
ret (num_bits / 32) * 4 + (num_bits % 32 ? 4 : 0);
}
NOINLINE static u64_t compress_block_v2(u32_t *const F, const u64_t _N,
const u8_t *const in, const u64_t in_size,
u8_t *const out, const int PROB_BITS) {
unless (BETWEEN(10, PROB_BITS, 15)) exit(1);
const u64_t PROB_SCALE = (1UL << PROB_BITS); u32_t *res = (u32_t *)out;
if (in_size == 0) { *res = 4; ret 4; }
int nit = _N; while (F[--nit] == 0);
const u64_t nBit = numBit(nit), N = nit + 1;
u32_t s = 0, cum[N + 1]; cum[0] = 0;
fin(N) cum[i + 1] = cum[i] + F[i], s += (_Bool)F[i];
if (s == 1) { res[0] = 8 + (1 << 24), res[1] = in_size + (in[0] << 24); ret 8; }
res += 3;
fix(1, N + 1, 1) cum[i] = (cum[i] * PROB_SCALE) / in_size;
fin(N) {
if (F[i] && cum[i + 1] == cum[i]) {
u32_t m = ~0u, best_steal, f;
fiN(j, N) { f = cum[j + 1] - cum[j]; if (f > 1 && f < m) m = f, best_steal = j; }
if (best_steal < i) fiX(j, best_steal + 1, i + 1, 1) cum[j]--;
else fiX(j, i + 1, best_steal + 1, 1) cum[j]++;
}
}
fin(N) F[i] = cum[i + 1] - cum[i];
Rans64EncSymbol e[N]; fin(N) {
e[i].freq = F[i];
e[i].cmpl_freq = (1 << PROB_BITS) - F[i];
if (F[i] < 2) {
e[i].rcp_freq = ~0UL;
e[i].rcp_shift = 0;
e[i].bias = cum[i] + ((1 << PROB_BITS) - 1);
} else {
u32_t shift = 0; while (F[i] > (1u << shift)) shift++;
u64_t x0, x1, t0, t1;
x0 = F[i] - 1;
x1 = 1UL << (shift + 31);
t1 = x1 / F[i];
x0 += (x1 % F[i]) << 32;
t0 = x0 / F[i];
e[i].rcp_freq = t0 + (t1 << 32);
e[i].rcp_shift = shift - 1;
e[i].bias = cum[i];
}
}
const u8_t *x = in, *const X = x + (in_size & ~1u);
u64_t state0 = RANS64_L, state1 = RANS64_L;
for (; x < X; x += 2) {
const Rans64EncSymbol *const sym0 = e + x[0];
const Rans64EncSymbol *const sym1 = e + x[1];
if (state0 >= ((RANS64_L >> PROB_BITS) << 32) * sym0->freq)
*res++ = (u32_t)state0, state0 >>= 32;
if (state1 >= ((RANS64_L >> PROB_BITS) << 32) * sym1->freq)
*res++ = (u32_t)state1, state1 >>= 32;
u64_t q0 = (uint64_t)(((unsigned __int128)state0 * sym0->rcp_freq) >> 64);
state0 += sym0->bias + (q0 >> sym0->rcp_shift) * sym0->cmpl_freq;
u64_t q1 = (uint64_t)(((unsigned __int128)state1 * sym1->rcp_freq) >> 64);
state1 += sym1->bias + (q1 >> sym1->rcp_shift) * sym1->cmpl_freq;
}
if (in_size & 1) {
const Rans64EncSymbol *const sym0 = e + *x;
if (state0 >= ((RANS64_L >> PROB_BITS) << 32) * sym0->freq)
*res++ = (u32_t)state0, state0 >>= 32;
u64_t q0 = (uint64_t)(((unsigned __int128)state0 * sym0->rcp_freq) >> 64);
state0 += sym0->bias + (q0 >> sym0->rcp_shift) * sym0->cmpl_freq;
}
*(u64_t *)res = state0, *(u64_t *)(res + 2) = state1; res += 4;
const u32_t tab_size = N + s * PROB_BITS;
_Bool compr_tab = tab_size < N * PROB_BITS;
bitstream_t b = { ._p = res };
u32_t *o = (u32_t *)out;
o[1] = in_size | ((N - 2) << 24), o[2] = (res - (o + 2)) | (PROB_BITS << 24);
if (compr_tab)
fin(N) {
if (F[i]) BITSTREAM_WRITE(b, PROB_BITS + 1, F[i] + PROB_SCALE);
else BITSTREAM_WRITE(b, 1, 0);
BITSTREAM_FLUSH(b);
}
else
fin(N) {
BITSTREAM_WRITE(b, PROB_BITS, F[i]);
BITSTREAM_FLUSH(b);
}
BITSTREAM_END(b); u32_t csz = (u8_t *)b._p - out;
*o = csz | ((3 + compr_tab) << 24);
if (csz >= 8 + bitstream_dword_aligned(nBit * in_size)) {
b = (bitstream_t){ ._p = o + 2 }, out[7] = nBit;
for (const u8_t *x = in, *const X = x + in_size; x < X; x++) {
BITSTREAM_WRITE(b, nBit, *x); BITSTREAM_FLUSH(b);
}
BITSTREAM_END(b); *o = ((u8_t *)b._p - out) | (2 << 24);
ret *o & BITMASK(24);
}
ret csz;
}
NOINLINE static u64_t decompress_block_v2(const u8_t *const in, u8_t *const out, u64_t *const dsz) {
const u32_t *res = (u32_t *)in, type = *res >> 24; if (type == 0) { *dsz = 0; ret 4; }
const u64_t csz = *res++ & BITMASK(24); const u32_t *const end = (u32_t *)(in + csz);
bitstream_t b = { .DP = (u32_t *)end };
const u32_t out_size = *res & BITMASK(24), v2 = *res++ >> 24; *dsz = out_size;
switch (type) {
case 1: memset(out, v2, out_size); ret csz;
case 2:
b._p = (u32_t *)res;
fin(out_size) {
BITSTREAM_FILL(b);
out[i] = BITSTREAM_READ(b, v2);
}
ret csz;
}
const u32_t N = v2 + 2; u32_t F[N], cum[N + 1]; cum[0] = 0;
b._p = (u32_t *)res + (*res & BITMASK(24));
const int PROB_BITS = *res++ >> 24;
const u64_t PROB_SCALE = (1UL << PROB_BITS);
const u32_t *const R = res; res = (const u32_t *)(b._p);
if (type == 3)
fin(N) {
BITSTREAM_FILL(b);
F[i] = BITSTREAM_READ(b, PROB_BITS);
}
else
fin(N) {
BITSTREAM_FILL(b);
if ((F[i] = BITSTREAM_READ(b, 1))) F[i] = BITSTREAM_READ(b, PROB_BITS);
}
fin(N) cum[i + 1] = cum[i] + F[i];
u8_t cum2sym[PROB_SCALE]; fin(N) memset(cum2sym + cum[i], i, F[i]);
u64_t state1 = *(u64_t *)(res -= 2), state0 = *(u64_t *)(res -= 2);
u8_t *x = out + out_size;
if (out_size & 1) {
--x;
x[0] = cum2sym[state0 & BITMASK(PROB_BITS)];
state0 = (F[x[0]] * (state0 >> PROB_BITS) + (state0 & BITMASK(PROB_BITS))) - cum[x[0]];
if (state0 < RANS64_L) { if (res > R) --res; state0 = (state0 << 32) | *res; }
}
for (x -= 2; x >= out; x -= 2) {
x[1] = cum2sym[state1 & BITMASK(PROB_BITS)];
x[0] = cum2sym[state0 & BITMASK(PROB_BITS)];
state1 = (F[x[1]] * (state1 >> PROB_BITS) + (state1 & BITMASK(PROB_BITS))) - cum[x[1]];
state0 = (F[x[0]] * (state0 >> PROB_BITS) + (state0 & BITMASK(PROB_BITS))) - cum[x[0]];
if (state1 < RANS64_L) { if (res > R) --res; state1 = (state1 << 32) | *res; }
if (state0 < RANS64_L) { if (res > R) --res; state0 = (state0 << 32) | *res; }
}
ret csz;
}
#undef RANS64_L
#define M1E_ALPHA(A, pr) \
if (A == 4) { \
const int i = 3, v = (s7_t)(p[3] - pr(A)); \
FA[*cx[9]++ = (v << 1) ^ (v >> 31)]++; \
} \
if (A == 4 && p[3] == 0); else {
#define M1ENC_(A) \
pix_toU; numB(pix); F[(pl << 4) + nl]++, pl = *cx[pl]++ = nl; \
if (nl) { \
const int n2 = nl << 1, n3 = n2 + nl; \
BITSTREAM_WRITE(k, n3, (pix[0] << n2) | (pix[1] << nl) | pix[2]); \
BITSTREAM_FLUSH(k); \
} } p += A;
#define M1ENC(A, pr) M1E_ALPHA(A, pr); fin(3) pix[i] = p[i] - pr(A); M1ENC_(A)
#define M1ENC4(A, Y, G) M1E_ALPHA(A, p1x_) \
fin(3) pix[i] = p[i] - ((Y) ? p3a_(A) : p2a_(A)); \
if (G) pix[0] -= pix[1], pix[2] -= pix[1]; M1ENC_(A)
#define M1E3(func_name, A, Y, G) \
NOINLINE static void func_name(u32_t *const F, bitstream_t *_k, u8_t **const cx, \
const s63_t bpr, const u64_t W, const u8_t *p, const u8_t *const P, const u8_t *L) { \
bitstream_t k = *_k; s31_t pix[3], nl; u32_t pl = 0; u32_t *const FA = F + 256; \
for (; p != L;) { M1ENC(A, p1x_); } p += W; \
for (; p != P;) { M1ENC(A, p1y_); for (L += bpr; p != L;) { M1ENC4(A, Y, G); } p += W; } \
*_k = k; \
}
M1E3(m1e_300, 3, 0, 0)
M1E3(m1e_301, 3, 0, 1)
M1E3(m1e_310, 3, 1, 0)
M1E3(m1e_311, 3, 1, 1)
M1E3(m1e_400, 4, 0, 0)
M1E3(m1e_401, 4, 0, 1)
M1E3(m1e_410, 4, 1, 0)
M1E3(m1e_411, 4, 1, 1)
#undef M1E3
static PTHTF(enc_1_th) {
data_t *const d = data; task_t *t;
const s63_t PXSZ = d->PXSZ, bpr = d->bpr;
u8_t *xp[10]; MALLOC(xp[0], 5e6) ret NULL;
fix(1, 10, 1) xp[i] = xp[i - 1] + 500000;
t: GET_TASK
u32_t F[512] = {}; u8_t *f, *cx[10];
memcpy(cx, xp, 8 * 10); MALLOC(t->f = f, 3e6) goto e;
bitstream_t k = { ._p = (u32_t *)(f + 8) }; fin(PXSZ) BITSTREAM_WRITE(k, 8, t->p[i]);
const u8_t *p = t->p, *const P = p + bpr * t->h, *L = p + t->w * PXSZ; p += PXSZ;
const u64_t W = bpr - t->w * PXSZ, pr = pp_rgbx(t, bpr, PXSZ);
(typeof(m1e_300)* []){
m1e_300, m1e_301, m1e_310, m1e_311,
m1e_400, m1e_401, m1e_410, m1e_411
}[pr](F, &k, cx, bpr, W, p, P, L);
BITSTREAM_END(k); u64_t sz = *(u32_t *)(f + 4) = (u8_t *)(k._p) - (f + 4); f += 4 + sz;
fin(9) f += compress_block_v2(F + i * 16, 9, xp[i], cx[i] - xp[i], f, 12);
if (PXSZ == 4) f += compress_block_v2(F + 256, 256, xp[9], cx[9] - xp[9], f, 15);
u64_t tsz = t->w * t->h * PXSZ + 4, fsz = f - t->f;
if (fsz < tsz)
t->f = f = realloc(t->f, fsz), *(u32_t *)f = (1 << 28) + (pr << 24) + fsz;
else {
t->f = f = realloc(t->f, tsz); *(u32_t *)f = tsz; f += 4;
for (p = t->p; p != P; p += bpr, f += t->w * PXSZ) memcpy(f, p, t->w * PXSZ);
}
goto t; e: free(xp[0]); return NULL;
}
#define G_p1x(to, operator) to = to operator p[0 - RGB];
#define G_p1y(to, operator) to = to operator p[0 - bpr];
#define G_p2a(to, operator) to = to operator ((p[0 - RGB] + p[0 - bpr] + 1) >> 1);
#define G_p3a(to, operator) to = \
to operator ((((3 * p[0 - RGB] + 3 * p[0 - bpr]) - 2 * p[(0 - bpr) - RGB]) + 2) >> 2);
#define G_toU(from) from = (s7_t)from; from = (from << 1) ^ (from >> 31);
#define ENC_GRAY(pr) \
if ((pix_0 = p[0]) != p[1] || p[1] != p[2]) ret 0; pr(pix_0, -); \
G_toU(pix_0); fin(4) F[i][*st[i]++ = pix_0]++; p += RGB;
NOINLINE static _Bool is_grayscale(const s63_t bpr, task_t *t, u8_t *const *const xp) {
if (t->p[0] != t->p[1] || t->p[1] != t->p[2]) ret 0; u8_t *res[4], *st[4], *f;
memcpy(st, xp, sizeof(u8_t *) * 4); memcpy(res, xp + 5, sizeof(u8_t *) * 4);
bitstream_t b[4] = {
{ ._p = (u32_t *)(xp[15] + 4), .l = 8, .bc = t->p[0] },
{ ._p = (u32_t *)(xp[16] + 4), .l = 8, .bc = t->p[0] },
{ ._p = (u32_t *)(xp[17] + 4), .l = 8, .bc = t->p[0] },
{ ._p = (u32_t *)(xp[18] + 4), .l = 8, .bc = t->p[0] }
};
const u64_t W = bpr - t->w * 3; u32_t F[4][256] = {};
s31_t pix_0, pix_1, pix_2, pix_3;
const u8_t *p = t->p, *const P = p + bpr * t->h, *L = p + t->w * RGB; p += RGB;
for (; p != L;) { ENC_GRAY(G_p1x); } p += W;
for (; p != P;) { ENC_GRAY(G_p1y); for (L += bpr; p != L; p += RGB) {
if ((pix_0 = pix_1 = pix_2 = pix_3 = p[0]) != p[1] || p[1] != p[2]) ret 0;
G_p1x(pix_0, -); G_toU(pix_0); F[0][*st[0]++ = pix_0]++;
G_p1y(pix_1, -); G_toU(pix_1); F[1][*st[1]++ = pix_1]++;
G_p2a(pix_2, -); G_toU(pix_2); F[2][*st[2]++ = pix_2]++;
G_p3a(pix_3, -); G_toU(pix_3); F[3][*st[3]++ = pix_3]++;
} p += W; }
size_t bsz = 1e6, rsz = 1e6, tsz, m = 0;
fin(4) {
compress_block(F[i], 256, st + i, st[i] - xp[0 + i], res + i, b + i, 15);
if (b[i].l > 0) *(b[i]._p)++ = b[i].bc << (32 - b[i].l);
size_t _bsz = *(u32_t *)(xp[15 + i]) = (u8_t *)(b[i]._p) - xp[15 + i], \
_rsz = xp[5 + i] - res[i];
if (_bsz + _rsz < bsz + rsz) m = i, bsz = _bsz, rsz = _rsz;
}
if (bsz + rsz >= (tsz = t->w * t->h)) {
MALLOC(t->f = f, tsz + 4) ret 0; *(u32_t *)f = tsz + 4 + (5 << 27); f += 4;
for (p = t->p, L = p + t->w * RGB; p != P; p += W, L += bpr)
for (; p != L; p += RGB) *f++ = *p;
ret 1;
}
MALLOC(t->f = f, bsz + rsz + 4) ret 0;
*(u32_t *)f = (bsz + rsz + 4) + (2 << 28) + (m << 24); f += 4;
memcpy(f, xp[15 + m], bsz); f += bsz; memcpy(f, res[m], rsz);
ret 1;
}
NOINLINE static _Bool is_single_color(task_t *t, const s63_t PXSZ, const s63_t bpr) {
const u64_t rsz = t->w * PXSZ;
const u8_t *const _p = t->p, *const L = _p + rsz,
*p = _p + PXSZ, *const P = _p + bpr * t->h;
for (; p < L; p += PXSZ) if (memcmp(_p, p, PXSZ)) ret 0;
for (p = _p + bpr; p < P; p += bpr) if (memcmp(_p, p, rsz)) ret 0;
CALLOC(t->f, 8) ret 0;
*(u32_t *)(t->f) = (255u << 24) | 8;
memcpy(t->f + 4, _p, PXSZ);
ret 1;
}
static PTHTF(enc_2_th) {
data_t *const d = data; task_t *t;
const s63_t PXSZ = d->PXSZ, bpr = d->bpr;
u8_t *f, *cx[9], *st[9], *xp[19]; MALLOC(xp[0], (u64_t)2e7) ret NULL;
fix(1, 19, 1) xp[i] = xp[i - 1] + 500000 * (i < 12 ? 1 : (i < 18 ? 3 : 4));
t: GET_TASK
if (is_single_color(t, PXSZ, bpr) || is_grayscale(bpr, t, xp)) goto t;
u32_t F[9][256] = {};
memcpy(cx, xp, 8 * 9); memcpy(st + 1, xp + 9, 8 * 8); xp[17] = xp[18];
bitstream_t b = { ._p = (u32_t *)(xp[18] + 4), .l = 24 };
fin(3) b.bc = (b.bc << 8) + t->p[i];
const u64_t W = bpr - t->w * PXSZ; s31_t pix[3], nl; u32_t pl = 0;
const u8_t *p = t->p, *const P = p + bpr * t->h, *L = p + t->w * PXSZ; p += PXSZ;
const u64_t pr = pp_rgbx(t, bpr, 3); const _Bool Y = pr & 2, G = pr & 1;
for (; p != L;) { ENC(p1x); } p += W;
for (; p != P;) { ENC(p1y); for (L += bpr; p != L;) { ENC4; } p += W; }
fin(9) compress_block(F[0] + i * 16, 9, cx + i, cx[i] - xp[i], xp + 17, &b, 14);
fix(1, 9, 1) compress_block(F[i], 1 << i * (i < 3 ? 3 : 1),
st + i, st[i] - xp[i + 8], xp + 17, &b, 14);
if (b.l > 0) *(b._p)++ = b.bc << (32 - b.l);
u64_t bsz = *(u32_t *)(xp[18]) = (u8_t *)(b._p) - xp[18], rsz = xp[18] - xp[17], tsz;
if (bsz + rsz >= (tsz = t->w * t->h * 3)) {
MALLOC(t->f = f, tsz + 4) goto e; *(u32_t *)f = tsz + 4; f += 4;
for (p = t->p; p != P; p += bpr, f += t->w * 3) memcpy(f, p, t->w * 3); goto t;
}
MALLOC(t->f = f, bsz + rsz + 4) goto e; u32_t m = (1 << 28) + (pr << 24);
*(u32_t *)f = (bsz + rsz + 4) + m; f += 4; memcpy(f, xp[18], bsz); f += bsz;
fin(9) { memcpy(f, cx[i], tsz = *(u32_t *)(cx[i]) & BITMASK(24)); f += tsz; }
fix(1, 9, 1) { memcpy(f, st[i], tsz = *(u32_t *)(st[i]) & BITMASK(24)); f += tsz; }
goto t; e: free(xp[0]); return NULL;
}
NOINLINE static _Bool normalize_RGBA(xpng_t *const d) {
if (d->A == 0) ret 0;
u32_t *p = (void *)(d->p), *const P = (void *)(d->p + d->s);
_Bool a = 0, inv_rgb = 0;
for (; p < P; p++) {
if ((*p >> 24) == 0 && *p != 0) { inv_rgb = 1; break; };
if ((*p >> 24) != 255) a = 1;
}
if (inv_rgb) {
p = (void *)(d->p); MALLOC(d->p, d->s) ret 1;
u32_t *p2 = (void *)(d->p);
for (; p < P; p++, p2++)
*p2 = (*p >> 24) ? *p : 0;
ret 0;
}
if (a) ret 0;
p = (void *)(d->p), d->s -= (d->s / 4), d->A = 0;
MALLOC(d->p, d->s) ret 1;
u8_t *p2 = d->p, *const P2 = p2 + (d->s - 3);
for (; p2 < P2; p2 += 3, p++)
*(u32_t *)p2 = *p;
*(u16_t *)p2 = *p, p2[2] = *p >> 16;
ret 0;
}
_Bool xpng_store_T(u64_t T, const u64_t mode, const xpng_t *const pm_, const char *const fn) {
#ifdef SYNC_IO
TIME_PAIR; TIME_GET_START;
if (pm_->w > (1 << 24) || !pm_->w || !(mode == 1 || mode == 2 || mode == 7) ||
pm_->h > (1 << 24) || !pm_->h || pm_->w * pm_->h * (3 + pm_->A) != pm_->s ||
pm_->p == NULL) ret 1;
const xpng_t pmv = *pm_, *const pm = &pmv;
if (normalize_RGBA((xpng_t *)pm)) ret 1;
if (pm->s <= 4) *(u64_t *)&mode = 7;
u32_t h[2] = { (pm->w - 1) | (mode << 24), (pm->h - 1) | (pm->A << 24) };
FILE *of = fopen(fn, "wb"); if (of == nil) ret 1;
if (mode == 7) ret fwrite(h, 1, 8, of) != 8 ||
fwrite(pm->p, 1, pm->s, of) != pm->s || fclose(of);
if (mode == 2) {
s63_t PXSZ = 3 + pm->A;
task_t t = { .p = pm->p, .w = pm->w, .h = pm->h, };
if (is_single_color(&t, PXSZ, t.w * PXSZ)) {
free(t.f); ((u8_t *)h)[7] |= 2;
if (fwrite( h, 1, 8, of) != 8 || fwrite(t.p, 1, PXSZ, of) != PXSZ) ret 1;
goto e;
}
}
if (pm->A && mode == 2) *(u64_t *)&mode = ((u8_t *)h)[3] = 1;
if (fwrite(h, 1, 8, of) != 8) ret 1;
N_INIT; if (spawn_and_wait(T, &d, 0, (void* []){ NULL, enc_1_th, enc_2_th }[mode])) ret 1;
TIME_GET_STOP; u64_t ns = TIME_DIFF_NS;
pf("encode, %3d thread%c: %5lu MPx/s\n",
(int)T, T > 1 ? 's' : ' ', (u64_t)((1e9 / ns) * (pm->s / (d.PXSZ * 1e6))));
u64_t x = 0;
fin(N) {
u32_t sz = *(u32_t *)(t[i].f) & BITMASK(24);
if (fwrite(t[i].f, 1, sz, of) != sz) ret 1;
x += sz, free(t[i].f);
}
if (x >= pm->s) {
((u8_t *)h)[3] = XPNG_COMPRESSION_TYPE_UNCOMPRESSED;
if (fclose(of)
|| (of = fopen(fn, "wb")) == NULL
|| fwrite(h, 1, 8, of) != 8
|| fwrite(pm->p, 1, pm->s, of) != pm->s) ret 1;
}
e: if (pm->p != pm_->p) free(pm->p);
ret (_Bool)fclose(of);
#else
#error
#endif
}
_Bool xpng_store(const u64_t mode, const xpng_t *pm, const char *const filename) {
ret xpng_store_T(T_MAX, mode, pm, filename);
}
#define M1DEC_(A, pr) \
if (A == 4) { \
int i = 3, v = *cx[9]++; \
v = (v >> 1) ^ (-(v & 1)); \
p[3] = v + pr(A); \
} \
if (A == 4 && p[3] == 0) *(u32_t *)p = 0; else { \
if ((nl = *cx[nl]++)) { \
BITSTREAM_FILL(k); \
const int n2 = nl << 1, n3 = n2 + nl; \
pix[2] = BITSTREAM_READ(k, n3); \
pix[0] = pix[2] >> n2, \
pix[1] = (pix[2] >> nl) & BITMASK(nl), \
pix[2] &= BITMASK(nl); \
} else fin(3) pix[i] = 0; pix_toS;
#define M1DEC(A, pr) M1DEC_(A, pr); fin(3) pix[i] += pr(A); pix_copy(p, pix); } p += A;
#define M1DEC4(A, Y, G) M1DEC_(A, p1x_); \
if (G) pix[0] += pix[1], pix[2] += pix[1]; \
fin(3) pix[i] += ((Y) ? p3a_(A) : p2a_(A)); pix_copy(p, pix); } p += A;
#define M1D3(func_name, A, Y, G) \
NOINLINE static void func_name(bitstream_t *_k, u8_t **const cx, \
const s63_t bpr, const u64_t W, u8_t *p, u8_t *const P, u8_t *L) { \
bitstream_t k = *_k; s31_t pix[3], nl = 0; \
for (; p != L;) { M1DEC(A, p1x_); } p += W; \
for (; p != P;) { M1DEC(A, p1y_); for (L += bpr; p != L;) { M1DEC4(A, Y, G); } p += W; } \
}
M1D3(m1d_300, 3, 0, 0)
M1D3(m1d_301, 3, 0, 1)
M1D3(m1d_310, 3, 1, 0)
M1D3(m1d_311, 3, 1, 1)
M1D3(m1d_400, 4, 0, 0)
M1D3(m1d_401, 4, 0, 1)
M1D3(m1d_410, 4, 1, 0)
M1D3(m1d_411, 4, 1, 1)
#undef M1D3
static PTHTF(dec_1_th) {
data_t *const d = data; task_t *t;
const s63_t PXSZ = d->PXSZ, bpr = d->bpr;
u8_t *xp; MALLOC(xp, 5e5 * (1 + (PXSZ == 4))) ret NULL;
t: GET_TASK
const u8_t *f = t->f; u8_t *cx[10]; cx[0] = xp;
u8_t *p = t->p, *const P = p + bpr * t->h, *L = p + t->w * PXSZ;
u32_t t_size = *(u32_t *)f & BITMASK(24), m = f[3]; f += 4;
if (!m) { for (; p != P; p += bpr, f += t->w * PXSZ) memcpy(p, f, t->w * PXSZ); goto t; }
bitstream_t k = { ._p = (u32_t *)(f + 4), .l = 32 };
k.DP = (u32_t *)(f += *(u32_t *)f), k.bc = *(k._p)++;
fin(PXSZ) t->p[i] = BITSTREAM_READ(k, 8);
u64_t dsz; fin(9) f += decompress_block_v2(f, cx[i], &dsz), cx[i + 1] = cx[i] + dsz;
if (PXSZ == 4) decompress_block_v2(f, cx[9], &dsz);
const u64_t W = bpr - t->w * PXSZ; p += PXSZ;
(typeof(m1d_300)* []){
m1d_300, m1d_301, m1d_310, m1d_311,
m1d_400, m1d_401, m1d_410, m1d_411
}[m & 7](&k, cx, bpr, W, p, P, L);
goto t; e: free(xp); return NULL;
}
#define DEC_GRAY(pr) \
pix = *st++; pix = (pix >> 1) ^ (-(pix & 1)); p[0] = p[1] = p[2] = pr(pix, +); p += RGB;
NOINLINE static void when_grayscale(const s63_t bpr, task_t *t, u8_t *const *const xp) {
u8_t *st = xp[0], *f = t->f + 4, m = t->f[3] & BITMASK(2);
u8_t *p = t->p, *const P = p + bpr * t->h, *L = p + t->w * RGB;
const u64_t W = bpr - t->w * RGB; s31_t pix;
if (t->f[3] & (1 << 3)) {
for (; p != P; p += W, L += bpr)
for (; p != L; p += RGB) p[0] = p[1] = p[2] = *f++;
ret;
}
bitstream_t b = { ._p = (u32_t *)(f + 4), .l = 32 };
b.DP = (u32_t *)(f += *(u32_t *)f), b.bc = *(b._p)++;
p[0] = p[1] = p[2] = (b.bc >> (b.l -= 8)) & 255; p += RGB;
decompress_block(f, 256, st, &b, 15);
for (; p != L;) { DEC_GRAY(G_p1x); } p += W;
for (; p != P;) { DEC_GRAY(G_p1y); for (L += bpr; p != L; p += RGB) {
pix = *st++; pix = (pix >> 1) ^ (-(pix & 1));
switch (m) {
case 0: G_p1x(pix, +); break;
case 1: G_p1y(pix, +); break;
case 2: G_p2a(pix, +); break;
case 3: G_p3a(pix, +);
}
p[0] = p[1] = p[2] = pix;
} p += W; }
}
#define DEC_ \
nl = *cx[nl]++; \
switch (nl) { \
case 0: fin(3) pix[i] = 0; break; \
case 1: pix[2] = *st[1]++, \
pix[0] = (pix[2] >> 2), pix[1] = (pix[2] >> 1) & 1, pix[2] &= 1; break; \
case 2: pix[2] = *st[2]++, \
pix[0] = (pix[2] >> 4), pix[1] = (pix[2] >> 2) & 3, pix[2] &= 3; break; \
default: fin(3) pix[i] = *st[nl]++; \
} pix_toS;
#define DEC(pr) DEC_; pr(+); pix_copy(p, pix); p += RGB;
#define DEC4 DEC_; \
if (G) pix[0] += pix[1], pix[2] += pix[1]; if (Y) p3a(+); else p2a(+); \
pix_copy(p, pix); p += RGB;
NOINLINE static void when_single_color(task_t *t, const s63_t PXSZ, const s63_t bpr) {
const u64_t rsz = t->w * PXSZ;
u8_t *const _p = t->p, *const L = _p + rsz,
*p = _p + PXSZ, *const P = _p + bpr * t->h;
memcpy(_p, t->f + 4, PXSZ);
for (; p < L; p += PXSZ) memcpy(p, _p, PXSZ);
for (p = _p + bpr; p < P; p += bpr) memcpy(p, _p, rsz);
}
static PTHTF(dec_2_th) {
data_t *const d = data; task_t *t;
const s63_t PXSZ = d->PXSZ, bpr = d->bpr;
u8_t *cx[9], *st[9], *xp[17]; MALLOC(xp[0], (u64_t)2e7) ret NULL;
fix(1, 17, 1) xp[i] = xp[i - 1] + 500000 * (i < 12 ? 1 : 3);
t: GET_TASK
const u8_t *f = t->f; u8_t *p = t->p, *const P = p + bpr * t->h, *L = p + t->w * 3;
u32_t t_size = *(u32_t *)f & BITMASK(24), m = f[3]; f += 4;
if (!m) { for (; p != P; p += bpr, f += t->w * 3) memcpy(p, f, t->w * 3); goto t; }
if (m == 255) { when_single_color(t, PXSZ, bpr); goto t; }
if ((m >> 4) == 2) { when_grayscale(bpr, t, xp); goto t; }
bitstream_t b = { ._p = (u32_t *)(f + 4), .l = 32 };
b.DP = (u32_t *)(f += *(u32_t *)f), b.bc = *(b._p)++;
fin(3) t->p[i] = (b.bc >> (b.l -= 8)) & 255;
memcpy(cx, xp, 8 * 9); memcpy(st + 1, xp + 9, 8 * 8);
fin(9) { decompress_block(f, 9, cx[i], &b, 14); f += *(u32_t *)f & BITMASK(24); }
fix(1, 9, 1) {
decompress_block(f, 1 << i * (i < 3 ? 3 : 1), st[i], &b, 14);
f += *(u32_t *)f & BITMASK(24);
}
s31_t pix[3], nl = 0; const u64_t W = bpr - t->w * 3; p += RGB; _Bool Y = m & 2, G = m & 1;
for (; p != L;) { DEC(p1x); } p += W;
for (; p != P;) { DEC(p1y); for (L += bpr; p != L;) { DEC4; } p += W; }
goto t; e: free(xp[0]); return NULL;
}
_Bool xpng_load_T(u64_t T, const char *const xpng, xpng_t *pm) {
#ifdef SYNC_IO
reg_t r; F_READ(xpng, &r) ret 1; TIME_PAIR; TIME_GET_START;
u64_t x = 8; const u32_t *h = (const u32_t *)(r.p);
pm->w = (h[0] & BITMASK(24)) + 1, pm->h = (h[1] & BITMASK(24)) + 1, pm->A = (h[1] >> 24) & 1;
const u64_t mode = h[0] >> 24;
unless (mode == 1 || mode == 2 || mode == 7) ret 1;
pm->s = (3 + pm->A) * pm->w * pm->h;
MALLOC(pm->p, pm->s) ret 1; if (mode == 7) ret !memcpy(pm->p, r.p + 8, pm->s);
if (r.s == 11 + pm->A && (r.p[7] & 2)) {
s63_t PXSZ = 3 + pm->A;
task_t t = { .p = pm->p, .w = pm->w, .h = pm->h, .f = r.p + 4 };
when_single_color(&t, PXSZ, t.w * PXSZ); ret 0;
}
N_INIT; fin(N) t[i].f = r.p + x, x += *(u32_t *)t[i].f & BITMASK(24);
if (spawn_and_wait(T, &d, 0, (void* []){ NULL, dec_1_th, dec_2_th }[mode])) ret 1;
TIME_GET_STOP; u64_t ns = TIME_DIFF_NS;
pf("decode, %3d thread%c: %5lu MPx/s\n",
(int)T, T > 1 ? 's' : ' ', (u64_t)((1e9 / ns) * (pm->s / (d.PXSZ * 1e6))));
ret 0;
#else
#error
#endif
}
_Bool xpng_load(const char *const xpng, xpng_t *pm) {