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Rearranging some miniz code to simplify it a bit.

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This commit is contained in:
Daviw Williams 2013-10-01 16:33:39 +02:00
parent 319a0ce352
commit 513c3a90b0
1 changed files with 16 additions and 25 deletions
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41
library/PolyVoxCore/include/PolyVoxCore/MinizBlockCompressor.inl
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@ -35,8 +35,7 @@ namespace PolyVox
:m_pDeflator(0) :m_pDeflator(0)
{ {
// Create and store the deflator. // Create and store the deflator.
tdefl_compressor* pDeflator = new tdefl_compressor; m_pDeflator = new tdefl_compressor;
m_pDeflator = /*reinterpret_cast<void*>*/(pDeflator);
// The number of dictionary probes to use at each compression level (0-10). 0=implies fastest/minimal possible probing. // The number of dictionary probes to use at each compression level (0-10). 0=implies fastest/minimal possible probing.
// The discontinuity is unsettling but may be explained by the 'iCompressionLevel <= 3' check later? // The discontinuity is unsettling but may be explained by the 'iCompressionLevel <= 3' check later?
@ -54,19 +53,27 @@ namespace PolyVox
MinizBlockCompressor<VoxelType>::~MinizBlockCompressor() MinizBlockCompressor<VoxelType>::~MinizBlockCompressor()
{ {
// Delete the deflator // Delete the deflator
tdefl_compressor* pDeflator = /*reinterpret_cast<tdefl_compressor*>*/(m_pDeflator); delete m_pDeflator;
delete pDeflator;
} }
template <typename VoxelType> template <typename VoxelType>
void MinizBlockCompressor<VoxelType>::compress(UncompressedBlock<VoxelType>* pSrcBlock, CompressedBlock<VoxelType>* pDstBlock) void MinizBlockCompressor<VoxelType>::compress(UncompressedBlock<VoxelType>* pSrcBlock, CompressedBlock<VoxelType>* pDstBlock)
{ {
// It seems we have to reinitialise the deflator for each fresh dataset (it's probably intended for streaming, which we're not doing here)
tdefl_status status = tdefl_init(m_pDeflator, NULL, NULL, m_uCompressionFlags);
if (status != TDEFL_STATUS_OKAY)
{
std::stringstream ss;
ss << "tdefl_init() failed with return code '" << status << "'";
POLYVOX_THROW(std::runtime_error, ss.str());
}
void* pSrcData = reinterpret_cast<void*>(pSrcBlock->getData()); void* pSrcData = reinterpret_cast<void*>(pSrcBlock->getData());
uint32_t uSrcLength = pSrcBlock->getDataSizeInBytes(); size_t uSrcLength = pSrcBlock->getDataSizeInBytes();
uint8_t tempBuffer[10000]; uint8_t tempBuffer[10000];
uint8_t* pDstData = reinterpret_cast<uint8_t*>( tempBuffer ); uint8_t* pDstData = reinterpret_cast<uint8_t*>( tempBuffer );
uint32_t uDstLength = 10000; size_t uDstLength = 10000;
uint32_t uCompressedLength = 0; uint32_t uCompressedLength = 0;
@ -138,26 +145,10 @@ namespace PolyVox
} }
template <typename VoxelType> template <typename VoxelType>
uint32_t MinizBlockCompressor<VoxelType>::compress(const void* pSrcData, uint32_t uSrcLength, void* pDstData, uint32_t uDstLength) uint32_t MinizBlockCompressor<VoxelType>::compress(const void* pSrcData, size_t uSrcLength, void* pDstData, size_t uDstLength)
{ {
//Get the deflator
tdefl_compressor* pDeflator = reinterpret_cast<tdefl_compressor*>(m_pDeflator);
// It seems we have to reinitialise the deflator for each fresh dataset (it's probably intended for streaming, which we're not doing here)
tdefl_status status = tdefl_init(pDeflator, NULL, NULL, m_uCompressionFlags);
if (status != TDEFL_STATUS_OKAY)
{
std::stringstream ss;
ss << "tdefl_init() failed with return code '" << status << "'";
POLYVOX_THROW(std::runtime_error, ss.str());
}
// Change the type to avoid compiler warnings
size_t ulSrcLength = uSrcLength;
size_t ulDstLength = uDstLength;
// Compress as much of the input as possible (or all of it) to the output buffer. // Compress as much of the input as possible (or all of it) to the output buffer.
status = tdefl_compress(pDeflator, pSrcData, &ulSrcLength, pDstData, &ulDstLength, TDEFL_FINISH); tdefl_status status = tdefl_compress(m_pDeflator, pSrcData, &uSrcLength, pDstData, &uDstLength, TDEFL_FINISH);
//Check whther the compression was successful. //Check whther the compression was successful.
if (status != TDEFL_STATUS_DONE) if (status != TDEFL_STATUS_DONE)
@ -168,7 +159,7 @@ namespace PolyVox
} }
// The compression modifies 'ulDstLength' to hold the new length. // The compression modifies 'ulDstLength' to hold the new length.
return ulDstLength; return uDstLength;
} }
template <typename VoxelType> template <typename VoxelType>