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//----------------------------------------------------------------------------//
/*
* Copyright (c) 2014 Sony Pictures Imageworks Inc
* Pixar Animation Studios
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution. Neither the name of Sony Pictures Imageworks nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
//----------------------------------------------------------------------------//
/*! \file OgSparseDataReader.h
\brief Contains functions controlling the loading of sparse fields.
*/
//----------------------------------------------------------------------------//
#ifndef _INCLUDED_Field3D_OgSparseDataReader_H_
#define _INCLUDED_Field3D_OgSparseDataReader_H_
//----------------------------------------------------------------------------//
#include <hdf5.h>
#include <string.h> // for memcpy
#include <zlib.h>
#include "OgIO.h"
#include "Hdf5Util.h"
//----------------------------------------------------------------------------//
#include "ns.h"
FIELD3D_NAMESPACE_OPEN
//----------------------------------------------------------------------------//
// OgSparseDataReader
//----------------------------------------------------------------------------//
//! This class gets used by SparseFieldIO and SparseFileManager to read
//! the block data. On creation it will open the data set and not close
//! it until the object is destroyed
//! \note This class should not be accessed by multiple threads. Instead,
//! instantiate a separate one for each thread.
//! \ingroup file_int
template <class Data_T>
class OgSparseDataReader
{
public:
// Constructors --------------------------------------------------------------
//! Constructor. Requires knowledge of the Ogawa location where data
//! is stored
OgSparseDataReader(const OgIGroup &location, const size_t valuesPerBlock,
const size_t occupiedBlocks, const bool isCompressed);
// Main methods --------------------------------------------------------------
//! Sets the reader's thread id
void setThreadId(const size_t id);
//! Reads a block, storing the data in result, which is assumed to contain
//! enough room for m_valuesPerBlock entries.
void readBlock(const size_t idx, Data_T *result);
private:
// Data members --------------------------------------------------------------
//! Og Dataset
OgIDataset<Data_T> m_dataset;
//! Compressed Og Dataset
OgICDataset<Data_T> m_cDataset;
//! Number of voxels per block
const size_t m_numVoxels;
//! Data name string
const std::string k_dataStr;
//! Whether the data is compressed
const bool m_isCompressed;
//! Thread ID. Used to alert Ogawa that different threads are accessing
//! the API concurrently.
size_t m_threadId;
//! Cache for decompression
std::vector<uint8_t> m_compressionCache;
};
//----------------------------------------------------------------------------//
// OgSparseDataReader implementations
//----------------------------------------------------------------------------//
template <class Data_T>
OgSparseDataReader<Data_T>::OgSparseDataReader(const OgIGroup &location,
const size_t numVoxels,
const size_t occupiedBlocks,
const bool isCompressed)
: m_numVoxels(numVoxels),
k_dataStr("data"),
m_isCompressed(isCompressed),
m_threadId(0)
{
using namespace Exc;
if (isCompressed) {
// Find the dataset
m_cDataset = location.findCompressedDataset<Data_T>(k_dataStr);
// Check validity
if (!m_cDataset.isValid()) {
throw ReadDataException("Couldn't open compressed data set: " +
k_dataStr);
}
// Check element count
if (m_cDataset.numDataElements() != occupiedBlocks) {
throw ReadDataException("Block count mismatch in SparseDataReader");
}
// Check data type
OgDataType typeOnDisk = location.compressedDatasetType(k_dataStr);
if (typeOnDisk != OgawaTypeTraits<Data_T>::typeEnum()) {
throw ReadDataException("Data type mismatch in SparseDataReader");
}
// Set the compresession cache size
m_compressionCache.resize(compressBound(numVoxels * sizeof(Data_T)));
} else {
// Find the dataset
m_dataset = location.findDataset<Data_T>(k_dataStr);
// Check validity
if (!m_dataset.isValid()) {
throw ReadDataException("Couldn't open data set: " + k_dataStr);
}
// Check element count
if (m_dataset.numDataElements() != occupiedBlocks) {
throw ReadDataException("Block count mismatch in SparseDataReader");
}
// Check data type
OgDataType typeOnDisk = location.datasetType(k_dataStr);
if (typeOnDisk != OgawaTypeTraits<Data_T>::typeEnum()) {
throw ReadDataException("Data type mismatch in SparseDataReader");
}
}
}
//----------------------------------------------------------------------------//
template <class Data_T>
void OgSparseDataReader<Data_T>::setThreadId(const size_t id)
{
m_threadId = id;
}
//----------------------------------------------------------------------------//
template <class Data_T>
void OgSparseDataReader<Data_T>::readBlock(const size_t idx, Data_T *result)
{
using namespace Exc;
if (m_isCompressed) {
// Length of compressed data
const uint64_t length = m_cDataset.dataSize(idx, m_threadId);
// Read data into compression cache
m_cDataset.getData(idx, &m_compressionCache[0], m_threadId);
// Target location
uint8_t *ucmpData = reinterpret_cast<uint8_t *>(result);
// Length of uncompressed data is stored here
uLong ucmpLen = m_numVoxels * sizeof(Data_T);
// Uncompress
int status = uncompress(ucmpData, &ucmpLen, &m_compressionCache[0],
length);
if (status != Z_OK) {
std::cout << "ERROR in uncompress: " << status
<< " " << ucmpLen << " " << length << std::endl;
return;
}
} else {
m_dataset.getData(idx, result, OGAWA_THREAD);
}
}
//----------------------------------------------------------------------------//
FIELD3D_NAMESPACE_HEADER_CLOSE
//----------------------------------------------------------------------------//
#endif
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