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/*
** Copyright (c) 2018,2020 Valve Corporation
** Copyright (c) 2018,2020 LunarG, Inc.
**
** 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.
*/
#ifdef ENABLE_LZ4_COMPRESSION
#include "util/lz4_compressor.h"
#include "util/logging.h"
#include "lz4.h"
GFXRECON_BEGIN_NAMESPACE(gfxrecon)
GFXRECON_BEGIN_NAMESPACE(util)
size_t Lz4Compressor::Compress(const size_t uncompressed_size,
const uint8_t* uncompressed_data,
std::vector<uint8_t>* compressed_data,
size_t compressed_data_offset)
{
size_t data_size = 0;
if (nullptr == compressed_data)
{
return 0;
}
size_t lz4_compressed_size = LZ4_COMPRESSBOUND(uncompressed_size);
if ((compressed_data_offset + lz4_compressed_size) > compressed_data->size())
{
compressed_data->resize(compressed_data_offset + lz4_compressed_size);
}
int compressed_size_generated =
LZ4_compress_fast(reinterpret_cast<const char*>(uncompressed_data),
reinterpret_cast<char*>(compressed_data->data() + compressed_data_offset),
static_cast<const int32_t>(uncompressed_size),
static_cast<int32_t>(lz4_compressed_size),
1);
if (compressed_size_generated > 0)
{
data_size = compressed_size_generated;
}
return data_size;
}
size_t Lz4Compressor::Decompress(const size_t compressed_size,
const std::vector<uint8_t>& compressed_data,
const size_t expected_uncompressed_size,
std::vector<uint8_t>* uncompressed_data)
{
size_t data_size = 0;
if (nullptr == uncompressed_data)
{
return 0;
}
int uncompressed_size_generated = LZ4_decompress_safe(reinterpret_cast<const char*>(compressed_data.data()),
reinterpret_cast<char*>(uncompressed_data->data()),
static_cast<int32_t>(compressed_size),
static_cast<int32_t>(expected_uncompressed_size));
if (uncompressed_size_generated > 0)
{
data_size = uncompressed_size_generated;
}
else
{
GFXRECON_LOG_ERROR("LZ4 decompression failed with error %d", uncompressed_size_generated);
}
return data_size;
}
GFXRECON_END_NAMESPACE(util)
GFXRECON_END_NAMESPACE(gfxrecon)
#endif // ENABLE_LZ4_COMPRESSION
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