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/*
* Simd Library (http://ermig1979.github.io/Simd).
*
* Copyright (c) 2011-2021 Yermalayeu Ihar.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __SimdImageSavePng_h__
#define __SimdImageSavePng_h__
#include "Simd/SimdImageSave.h"
#include "Simd/SimdLoad.h"
#define SIMD_PNG_ZLIB_BIT_REV_TABLE
namespace Simd
{
namespace Base
{
extern const uint16_t ZlibLenC[30];
extern const uint8_t ZlibLenEb[29];
extern const uint16_t ZlibDistC[31];
extern const uint8_t ZlibDistEb[30];
#if defined(SIMD_PNG_ZLIB_BIT_REV_TABLE)
const int ZlibBitRevShift = 9;
const int ZlibBitRevSize = 1 << ZlibBitRevShift;
extern int ZlibBitRevTable[ZlibBitRevSize];
SIMD_INLINE int ZlibBitRev(int bits, int count)
{
assert(bits < ZlibBitRevSize&& count <= ZlibBitRevShift);
return ZlibBitRevTable[bits] >> (ZlibBitRevShift - count);
}
#else
SIMD_INLINE int ZlibBitRev(int bits, int count)
{
int rev = 0;
for (size_t b = 0; b < count; b++)
{
rev = (rev << 1) | (bits & 1);
bits >>= 1;
}
return rev;
}
#endif
SIMD_INLINE uint32_t ZlibHash(const uint8_t* data)
{
uint32_t hash = data[0] + (data[1] << 8) + (data[2] << 16);
hash ^= hash << 3;
hash += hash >> 5;
hash ^= hash << 4;
hash += hash >> 17;
hash ^= hash << 25;
hash += hash >> 6;
return hash;
}
SIMD_INLINE void ZlibHuffA(int bits, int count, OutputMemoryStream& stream)
{
stream.WriteBits(ZlibBitRev(bits, count), count);
}
SIMD_INLINE void ZlibHuff1(int bits, OutputMemoryStream& stream)
{
ZlibHuffA(0x30 + bits, 8, stream);
}
SIMD_INLINE void ZlibHuff2(int bits, OutputMemoryStream& stream)
{
ZlibHuffA(0x190 + bits - 144, 9, stream);
}
SIMD_INLINE void ZlibHuff3(int bits, OutputMemoryStream& stream)
{
ZlibHuffA(0 + bits - 256, 7, stream);
}
SIMD_INLINE void ZlibHuff4(int bits, OutputMemoryStream& stream)
{
ZlibHuffA(0xc0 + bits - 280, 8, stream);
}
SIMD_INLINE void ZlibHuff(int bits, OutputMemoryStream& stream)
{
if (bits <= 143)
ZlibHuff1(bits, stream);
else if (bits <= 255)
ZlibHuff2(bits, stream);
else if (bits <= 279)
ZlibHuff3(bits, stream);
else
ZlibHuff4(bits, stream);
}
SIMD_INLINE void ZlibHuffB(int bits, OutputMemoryStream& stream)
{
if (bits <= 143)
ZlibHuff1(bits, stream);
else
ZlibHuff2(bits, stream);
}
SIMD_INLINE int ZlibCount(const uint8_t* a, const uint8_t* b, int limit)
{
limit = Min(limit, 258);
int i = 0;
#if defined(SIMD_X64_ENABLE) || defined(SIMD_ARM64_ENABLE)
int limit8 = limit & (~7);
for (; i < limit8; i += 8)
if (*(uint64_t*)(a + i) != *(uint64_t*)(b + i))
break;
#else
int limit4 = limit & (~3);
for (; i < limit4; i += 4)
if (*(uint32_t*)(a + i) != *(uint32_t*)(b + i))
break;
#endif
for (; i < limit; i += 1)
if (a[i] != b[i])
break;
return i;
}
SIMD_INLINE uint8_t Paeth(int a, int b, int c)
{
int p = a + b - c, pa = abs(p - a), pb = abs(p - b), pc = abs(p - c);
if (pa <= pb && pa <= pc)
return uint8_t(a);
if (pb <= pc)
return uint8_t(b);
return uint8_t(c);
}
}
#ifdef SIMD_SSE41_ENABLE
namespace Sse41
{
SIMD_INLINE int ZlibCount(const uint8_t* a, const uint8_t* b, int limit)
{
limit = Min(limit, 258);
int i = 0;
int limit16 = limit & (~15);
for (; i < limit16; i += 16)
if (_mm_movemask_epi8(_mm_cmpeq_epi8(_mm_loadu_si128((__m128i*)(a + i)), _mm_loadu_si128((__m128i*)(b + i)))) != 0xFFFF)
break;
#if defined(SIMD_X64_ENABLE)
int limit8 = limit & (~7);
for (; i < limit8; i += 8)
if (*(uint64_t*)(a + i) != *(uint64_t*)(b + i))
break;
#else
int limit4 = limit & (~3);
for (; i < limit4; i += 4)
if (*(uint32_t*)(a + i) != *(uint32_t*)(b + i))
break;
#endif
for (; i < limit; i += 1)
if (a[i] != b[i])
break;
return i;
}
}
#endif// SIMD_SSE41_ENABLE
#ifdef SIMD_AVX2_ENABLE
namespace Avx2
{
SIMD_INLINE int ZlibCount(const uint8_t* a, const uint8_t* b, int limit)
{
limit = Min(limit, 258);
int i = 0;
for (; i < limit; i += 32)
{
__m256i _a = _mm256_loadu_si256((__m256i*)(a + i));
__m256i _b = _mm256_loadu_si256((__m256i*)(b + i));
uint32_t mask = _mm256_movemask_epi8(_mm256_cmpeq_epi8(_a, _b));
if (mask != 0xFFFFFFFF)
{
i += _tzcnt_u32(~mask);
break;
}
}
return Min(i, limit);
}
}
#endif// SIMD_AVX2_ENABLE
#ifdef SIMD_AVX512BW_ENABLE
namespace Avx512bw
{
SIMD_INLINE int ZlibCount(const uint8_t* a, const uint8_t* b, int limit)
{
limit = Min(limit, 258);
int i = 0;
for (; i < limit; i += 64)
{
__m512i _a = _mm512_loadu_si512(a + i);
__m512i _b = _mm512_loadu_si512(b + i);
uint64_t mask = _mm512_cmp_epi8_mask(_a, _b, _MM_CMPINT_NE);
if (mask != 0)
{
i += (int)FirstNotZero64(mask);
break;
}
}
return Min(i, limit);
}
}
#endif// SIMD_AVX512BW_ENABLE
#ifdef SIMD_NEON_ENABLE
namespace Neon
{
}
#endif// SIMD_NEON_ENABLE
}
#endif//__SimdImageSavePng_h__
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