260 lines
7.2 KiB
C
260 lines
7.2 KiB
C
/**
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Copyright (C) powturbo 2015-2018
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GPL v2 License
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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- email : powturbo [AT] gmail.com
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- github : https://github.com/powturbo
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- homepage : https://sites.google.com/site/powturbo/
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- twitter : https://twitter.com/powturbo
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TurboRLE - "Most efficient and fastest Run Length Encoding"
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**/
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#ifndef USIZE
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#include <string.h>
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#ifdef __SSE__
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#include <emmintrin.h>
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#endif
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#include "trle.h"
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#include "trle_.h"
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//------------------------------------- RLE with Escape char ------------------------------------------------------------------
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//#define MEMSAFE
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#define SRLE8 32 // 16//
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#define USIZE 8
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#include "trled.c"
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#if SRLE8
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unsigned _srled8(const unsigned char *__restrict in, unsigned char *__restrict out, unsigned outlen, unsigned char e) {
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const uint8_t *ip = in;
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uint8_t *op = out, c;
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uint32_t i;
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#ifdef __SSE__
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__m128i ev = _mm_set1_epi8(e);
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#endif
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if(outlen >= SRLE8)
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while(op < out+(outlen-SRLE8)) {
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#ifdef __SSE__ // TODO: test _mm_cmpestrm/_mm_cmpestri on sse4
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uint32_t mask;
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__m128i u,v = _mm_loadu_si128((__m128i*)ip); _mm_storeu_si128((__m128i *)op, v); mask = _mm_movemask_epi8(_mm_cmpeq_epi8(v, ev)); if(mask) goto a; op += 16; ip += 16;
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#if SRLE8 >= 32
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u = _mm_loadu_si128((__m128i*)ip); _mm_storeu_si128((__m128i *)op, u); mask = _mm_movemask_epi8(_mm_cmpeq_epi8(u, ev)); if(mask) goto a; op += 16; ip += 16;
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#endif
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__builtin_prefetch(ip+512, 0);
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continue;
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a: i = ctz32(mask);
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op += i; ip += i+1;
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{
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#else
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if(likely((c = *(uint8_t *)ip) != e)) {
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ip++;
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*op++ = c;
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} else {
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#endif
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vbget32(ip, i);
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if(likely(i)) {
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uint8_t c = *ip++;
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i += TMIN;
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rmemset(op, c, i);
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} else
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*op++ = e;
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}
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}
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#define rmemset8(_op_, _c_, _i_) while(_i_--) *_op_++ = _c_
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while(op < out+outlen)
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if(likely((c = *ip) != e)) {
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ip++;
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*op++ = c;
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} else {
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int i;
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ip++;
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vbget32(ip, i);
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if(likely(i)) {
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c = *ip++;
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i += TMIN;
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rmemset8(op, c, i);
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} else
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*op++ = e;
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}
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return ip - in;
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}
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#endif
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unsigned _srled(const unsigned char *__restrict in, unsigned char *__restrict out, unsigned outlen) {
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return _srled8(in+1, out, outlen, *in);
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}
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unsigned srled(const unsigned char *__restrict in, unsigned inlen, unsigned char *__restrict out, unsigned outlen) {
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if(inlen == outlen)
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memcpy(out, in, outlen);
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else if(inlen == 1)
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memset(out, in[0], outlen);
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else
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return _srled8(in+1, out, outlen, *in);
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return inlen;
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}
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//------------------------------------- TurboRLE ------------------------------------------
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unsigned _trled(const unsigned char *__restrict in, unsigned char *__restrict out, unsigned outlen) {
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uint8_t b[256] = {0},*op = out;
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const uint8_t *ip;
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int m = -1, i, c;
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if(outlen < 1)
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return 0;
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if(!*in++)
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return _srled8(in+1, out, outlen, *in)+2;
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for(ip = in; ip < in+32; ip++)
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for(i = 0; i < 8; ++i)
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if(((*ip) >> i) & 1)
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b[(ip-in)<<3 | i] = ++m+1;
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if(outlen >= 32)
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while(op < out+(outlen-32)) {
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if(b[*ip]) goto a; *op++ = *ip++;
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if(b[*ip]) goto a; *op++ = *ip++;
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if(b[*ip]) goto a; *op++ = *ip++;
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if(b[*ip]) goto a; *op++ = *ip++;
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if(b[*ip]) goto a; *op++ = *ip++;
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if(b[*ip]) goto a; *op++ = *ip++;
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if(b[*ip]) goto a; *op++ = *ip++;
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if(b[*ip]) goto a; *op++ = *ip++;
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__builtin_prefetch(ip+256, 0);
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continue;
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a:
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c = b[*ip++];
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vbzget(ip, i, m, c-1);
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c = *ip++;
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i += 3;
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rmemset(op,c,i);
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}
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while(op < out+outlen) {
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if(likely(!(c = b[*ip])))
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*op++ = *ip++;
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else {
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ip++;
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vbzget(ip, i, m, c-1);
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c = *ip++;
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i += 3;
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rmemset8(op,c,i);
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}
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}
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return ip - in;
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}
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unsigned trled(const unsigned char *__restrict in, unsigned inlen, unsigned char *__restrict out, unsigned outlen) {
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if(inlen == outlen)
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memcpy(out, in, outlen);
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else if(inlen == 1)
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memset(out, in[0], outlen);
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else
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return _trled(in, out, outlen);
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return inlen;
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}
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#undef USIZE
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#undef rmemset
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#undef SRLE8
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#define USIZE 16
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#include "trled.c"
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#undef rmemset
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#undef USIZE
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#undef runcpy
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#define USIZE 32
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#include "trled.c"
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#undef rmemset
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#undef USIZE
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#undef runcpy
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#define USIZE 64
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#include "trled.c"
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#undef rmemset
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#undef USIZE
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#else
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#ifdef MEMSAFE
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#define rmemset(_op_, _c_, _i_) while(_i_--) *_op_++ = _c_
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#elif defined(__SSE__) && USIZE < 64
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#define rmemset(_op_, _c_, _i_) do { \
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__m128i *_up = (__m128i *)_op_, cv = TEMPLATE2(_mm_set1_epi, USIZE)(_c_);\
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_op_ += _i_;\
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do { _mm_storeu_si128( _up, cv); _mm_storeu_si128(_up+1, cv); _up+=2; } while(_up < (__m128i *)_op_);\
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} while(0)
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#else
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#define _cset64(_cc,_c_) _cc = _c_
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#define _cset32(_cc,_c_) _cc = _c_; _cc = _cc<<32|_cc
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#define _cset16(_cc,_c_) _cc = _c_; _cc = _cc<<48|_cc<<32|_cc<<16|_cc
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#define _cset8( _cc,_c_) _cc = (uint32_t)_c_<<24 | (uint32_t)_c_<<16 | (uint32_t)_c_<<8 | (uint32_t)_c_; _cc = _cc<<32|_cc
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#define rmemset(_op_, _c_, _i_) do { uint64_t _cc; uint8_t *_up = (uint8_t *)_op_; _op_ +=_i_;\
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TEMPLATE2(_cset, USIZE)(_cc,_c_);\
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do {\
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TEMPLATE2(ctou, USIZE)(_up) = _c_; _up += USIZE/8;\
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TEMPLATE2(ctou, USIZE)(_up) = _c_; _up += USIZE/8;\
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} while(_up < (uint8_t *)_op_);\
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} while(0)
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#endif
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#define uint_t TEMPLATE3(uint, USIZE, _t)
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#if !SRLE8
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unsigned TEMPLATE2(_srled, USIZE)(const unsigned char *__restrict in, unsigned char *__restrict cout, unsigned outlen, uint_t e) {
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uint_t *out = (uint_t *)cout, *op = out, c;
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const unsigned char *ip = in;
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while(op < out+outlen/sizeof(uint_t)) { __builtin_prefetch(ip +384, 0);
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if(likely((c = *(uint_t *)ip) != e)) {
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ip += sizeof(uint_t);
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*op++ = c;
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} else {
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int i;
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ip += sizeof(uint_t);
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vbget32(ip, i);
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if(likely(i)) {
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c = *(uint_t *)ip;
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ip += sizeof(uint_t);
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i += 3;
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rmemset(op, c, i);
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} else
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*op++ = e;
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}
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}
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#if USIZE > 8
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{ unsigned char *p = (unsigned char *)op;
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while(p < cout+outlen) *p++ = *ip++;
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}
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#endif
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return ip - in;
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}
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#endif
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unsigned TEMPLATE2(srled, USIZE)(const unsigned char *__restrict in, unsigned inlen, unsigned char *__restrict out, unsigned outlen, uint_t e) {
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if(inlen == outlen)
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memcpy(out, in, outlen);
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else if(inlen == 1)
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memset(out, in[0], outlen);
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else
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return TEMPLATE2(_srled, USIZE)(in, out, outlen, e);
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return inlen;
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}
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#endif
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