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/*
* Simd Library (http://ermig1979.github.io/Simd).
*
* Copyright (c) 2011-2022 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.
*/
#include "Simd/SimdMemory.h"
#include "Simd/SimdImageSave.h"
#include "Simd/SimdImageSavePng.h"
#include "Simd/SimdBase.h"
#include "Simd/SimdCpu.h"
namespace Simd
{
namespace Base
{
const uint16_t ZlibLenC[30] = { 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 259 };
const uint8_t ZlibLenEb[29] = { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0 };
const uint16_t ZlibDistC[31] = { 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 32768 };
const uint8_t ZlibDistEb[30] = { 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13 };
#if defined(SIMD_PNG_ZLIB_BIT_REV_TABLE)
int ZlibBitRevTable[512];
static bool ZlibBitRevTableInit()
{
for (int i = 0; i < 512; i++)
{
int rev = 0, val = i;
for (size_t b = 0; b < 9; b++)
{
rev = (rev << 1) | (val & 1);
val >>= 1;
}
ZlibBitRevTable[i] = rev;
}
return true;
}
bool ZlibBitRevTableInited = ZlibBitRevTableInit();
#endif
uint32_t ZlibAdler32(uint8_t* data, int size)
{
uint32_t lo = 1, hi = 0;
for (int b = 0, n = (int)(size % 5552); b < size;)
{
for (int i = 0; i < n; ++i)
{
lo += data[b + i];
hi += lo;
}
lo %= 65521;
hi %= 65521;
b += n;
n = 5552;
}
return (hi << 16) | lo;
}
void ZlibCompress(uint8_t* data, int size, int quality, OutputMemoryStream& stream)
{
const int ZHASH = 16384;
if (quality < 5)
quality = 5;
const int basket = quality * 2;
Array32i hashTable(ZHASH * basket);
memset(hashTable.data, -1, hashTable.RawSize());
stream.Write(uint8_t(0x78));
stream.Write(uint8_t(0x5e));
stream.WriteBits(1, 1);
stream.WriteBits(1, 2);
int i = 0, j;
while (i < size - 3)
{
int h = ZlibHash(data + i) & (ZHASH - 1), best = 3;
uint8_t* bestLoc = 0;
int* hList = hashTable.data + h * basket;
for (j = 0; hList[j] != -1 && j < basket; ++j)
{
if (hList[j] > i - 32768)
{
int d = ZlibCount(data + hList[j], data + i, size - i);
if (d >= best)
{
best = d;
bestLoc = data + hList[j];
}
}
}
if (j == basket)
{
memcpy(hList, hList + quality, quality * sizeof(int));
memset(hList + quality, -1, quality * sizeof(int));
j = quality;
}
hList[j] = i;
if (bestLoc)
{
h = ZlibHash(data + i + 1) & (ZHASH - 1);
int* hList = hashTable.data + h * basket;
for (j = 0; hList[j] != -1 && j < basket; ++j)
{
if (hList[j] > i - 32767)
{
int e = ZlibCount(data + hList[j], data + i + 1, size - i - 1);
if (e > best)
{
bestLoc = NULL;
break;
}
}
}
}
if (bestLoc)
{
int d = (int)(data + i - bestLoc);
assert(d <= 32767 && best <= 258);
for (j = 0; best > Base::ZlibLenC[j + 1] - 1; ++j);
Base::ZlibHuff(j + 257, stream);
if (Base::ZlibLenEb[j])
stream.WriteBits(best - Base::ZlibLenC[j], Base::ZlibLenEb[j]);
for (j = 0; d > Base::ZlibDistC[j + 1] - 1; ++j);
stream.WriteBits(Base::ZlibBitRev(j, 5), 5);
if (Base::ZlibDistEb[j])
stream.WriteBits(d - Base::ZlibDistC[j], Base::ZlibDistEb[j]);
i += best;
}
else
{
ZlibHuffB(data[i], stream);
++i;
}
}
for (; i < size; ++i)
ZlibHuffB(data[i], stream);
ZlibHuff(256, stream);
stream.FlushBits();
stream.WriteBe32u(ZlibAdler32(data, size));
}
uint32_t EncodeLine0(const uint8_t* src, size_t stride, size_t n, size_t size, int8_t* dst)
{
uint32_t sum = 0;
for (size_t i = 0; i < size; ++i)
{
dst[i] = src[i];
sum += ::abs(dst[i]);
}
return sum;
}
uint32_t EncodeLine1(const uint8_t* src, size_t stride, size_t n, size_t size, int8_t* dst)
{
uint32_t sum = 0;
for (size_t i = 0; i < n; ++i)
{
dst[i] = src[i];
sum += ::abs(dst[i]);
}
for (size_t i = n; i < size; ++i)
{
dst[i] = src[i] - src[i - n];
sum += ::abs(dst[i]);
}
return sum;
}
uint32_t EncodeLine2(const uint8_t* src, size_t stride, size_t n, size_t size, int8_t* dst)
{
uint32_t sum = 0;
for (size_t i = 0; i < n; ++i)
{
dst[i] = src[i] - src[i - stride];
sum += ::abs(dst[i]);
}
for (size_t i = n; i < size; ++i)
{
dst[i] = src[i] - src[i - stride];
sum += ::abs(dst[i]);
}
return sum;
}
uint32_t EncodeLine3(const uint8_t* src, size_t stride, size_t n, size_t size, int8_t* dst)
{
uint32_t sum = 0;
for (size_t i = 0; i < n; ++i)
{
dst[i] = src[i] - (src[i - stride] >> 1);
sum += ::abs(dst[i]);
}
for (size_t i = n; i < size; ++i)
{
dst[i] = src[i] - ((src[i - n] + src[i - stride]) >> 1);
sum += ::abs(dst[i]);
}
return sum;
}
uint32_t EncodeLine4(const uint8_t* src, size_t stride, size_t n, size_t size, int8_t* dst)
{
uint32_t sum = 0;
for (size_t i = 0; i < n; ++i)
{
dst[i] = (int8_t)(src[i] - src[i - stride]);
sum += ::abs(dst[i]);
}
for (size_t i = n; i < size; ++i)
{
dst[i] = src[i] - Paeth(src[i - n], src[i - stride], src[i - stride - n]);
sum += ::abs(dst[i]);
}
return sum;
}
uint32_t EncodeLine5(const uint8_t* src, size_t stride, size_t n, size_t size, int8_t* dst)
{
uint32_t sum = 0;
for (size_t i = 0; i < n; ++i)
{
dst[i] = src[i];
sum += ::abs(dst[i]);
}
for (size_t i = n; i < size; ++i)
{
dst[i] = src[i] - (src[i - n] >> 1);
sum += ::abs(dst[i]);
}
return sum;
}
uint32_t EncodeLine6(const uint8_t* src, size_t stride, size_t n, size_t size, int8_t* dst)
{
uint32_t sum = 0;
for (size_t i = 0; i < n; ++i)
{
dst[i] = src[i];
sum += ::abs(dst[i]);
}
for (size_t i = n; i < size; ++i)
{
dst[i] = src[i] - src[i - n];
sum += ::abs(dst[i]);
}
return sum;
}
ImagePngSaver::ImagePngSaver(const ImageSaverParam& param)
: ImageSaver(param)
, _channels(0)
, _size(0)
, _convert(NULL)
{
switch (_param.format)
{
case SimdPixelFormatGray8:
_channels = 1;
break;
case SimdPixelFormatBgr24:
_channels = 3;
break;
case SimdPixelFormatBgra32:
_channels = 4;
break;
case SimdPixelFormatRgb24:
_channels = 3;
break;
case SimdPixelFormatRgba32:
_channels = 4;
break;
default:
break;
}
_size = _param.width * _channels;
if (_param.format == SimdPixelFormatBgr24)
{
_convert = Base::BgrToRgb;
_buff.Resize(_param.height * _size);
}
else if (_param.format == SimdPixelFormatBgra32)
{
_convert = Base::BgraToRgba;
_buff.Resize(_param.height * _size);
}
_filt.Resize((_size + 1) * _param.height);
_line.Resize(_size * FILTERS);
_encode[0] = Base::EncodeLine0;
_encode[1] = Base::EncodeLine1;
_encode[2] = Base::EncodeLine2;
_encode[3] = Base::EncodeLine3;
_encode[4] = Base::EncodeLine4;
_encode[5] = Base::EncodeLine5;
_encode[6] = Base::EncodeLine6;
_compress = Base::ZlibCompress;
}
bool ImagePngSaver::ToStream(const uint8_t* src, size_t stride)
{
if (_convert)
{
_convert(src, _param.width, _param.height, stride, _buff.data, _size);
src = _buff.data;
stride = _size;
}
for (size_t row = 0; row < _param.height; ++row)
{
int bestFilter = 0, bestSum = INT_MAX;
for (int filter = 0; filter < FILTERS; filter++)
{
static const int TYPES[] = { 0, 1, 0, 5, 6, 0, 1, 2, 3, 4 };
int type = TYPES[filter + (row ? 1 : 0) * FILTERS];
int sum = _encode[type](src + stride * row, stride, _channels, _size, _line.data + _size * filter);
if (sum < bestSum)
{
bestSum = sum;
bestFilter = filter;
}
}
_filt[row * (_size + 1)] = (uint8_t)bestFilter;
memcpy(_filt.data + row * (_size + 1) + 1, _line.data + _size * bestFilter, _size);
}
OutputMemoryStream zlib(Simd::Min(_param.width * _param.height, Base::AlgCacheL1()));
_compress(_filt.data, (int)_filt.size, COMPRESSION, zlib);
WriteToStream(zlib.Data(), zlib.Size());
return true;
}
SIMD_INLINE void WriteCrc32(OutputMemoryStream& stream, size_t size)
{
stream.WriteBe32u(Base::Crc32(stream.Current() - size - 4, size + 4));
}
void ImagePngSaver::WriteToStream(const uint8_t* zlib, size_t zlen)
{
const uint8_t SIGNATURE[8] = { 137, 80, 78, 71, 13, 10, 26, 10 };
const int8_t CTYPE[5] = { -1, 0, 4, 2, 6 };
_stream.Reserve(8 + 12 + 13 + 12 + zlen + 12);
_stream.Write(SIGNATURE, 8);
_stream.WriteBe32u(13);
_stream.Write("IHDR", 4);
_stream.WriteBe32u((uint32_t)_param.width);
_stream.WriteBe32u((uint32_t)_param.height);
_stream.Write8u(8);
_stream.Write8u(CTYPE[_channels]);
_stream.Write8u(0);
_stream.Write8u(0);
_stream.Write8u(0);
WriteCrc32(_stream, 13);
_stream.WriteBe32u((uint32_t)zlen);
_stream.Write("IDAT", 4);
_stream.Write(zlib, zlen);
WriteCrc32(_stream, zlen);
_stream.WriteBe32u(0);
_stream.Write("IEND", 4);
WriteCrc32(_stream, 0);
}
}
}
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