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cameracv/libs/opencv/3rdparty/openexr/IlmImf/ImfDeepScanLineInputFile.cpp

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2023-05-18 21:39:43 +03:00
///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2011, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// 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 Industrial Light & Magic 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.
//
///////////////////////////////////////////////////////////////////////////
//-----------------------------------------------------------------------------
//
// class DeepScanLineInputFile
//
//-----------------------------------------------------------------------------
#include <ImfDeepScanLineInputFile.h>
#include <ImfChannelList.h>
#include <ImfMisc.h>
#include <ImfStdIO.h>
#include <ImfCompressor.h>
#include <ImfXdr.h>
#include <ImfConvert.h>
#include <ImfThreading.h>
#include <ImfPartType.h>
#include <ImfVersion.h>
#include "ImfMultiPartInputFile.h"
#include "ImfDeepFrameBuffer.h"
#include "ImfInputStreamMutex.h"
#include "ImfInputPartData.h"
#include "ImathBox.h"
#include "ImathFun.h"
#include "IlmThreadPool.h"
#include "IlmThreadSemaphore.h"
#include "IlmThreadMutex.h"
#include "Iex.h"
#include <string>
#include <vector>
#include <assert.h>
#include <limits>
#include <algorithm>
#include "ImfNamespace.h"
OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER
using IMATH_NAMESPACE::Box2i;
using IMATH_NAMESPACE::divp;
using IMATH_NAMESPACE::modp;
using std::string;
using std::vector;
using std::ifstream;
using std::min;
using std::max;
using ILMTHREAD_NAMESPACE::Mutex;
using ILMTHREAD_NAMESPACE::Lock;
using ILMTHREAD_NAMESPACE::Semaphore;
using ILMTHREAD_NAMESPACE::Task;
using ILMTHREAD_NAMESPACE::TaskGroup;
using ILMTHREAD_NAMESPACE::ThreadPool;
namespace {
struct InSliceInfo
{
PixelType typeInFrameBuffer;
PixelType typeInFile;
char * base;
char* pointerArrayBase;
size_t xPointerStride;
size_t yPointerStride;
size_t sampleStride;
int xSampling;
int ySampling;
bool fill;
bool skip;
double fillValue;
InSliceInfo (PixelType typeInFrameBuffer = HALF,
char * base = NULL,
PixelType typeInFile = HALF,
size_t xPointerStride = 0,
size_t yPointerStride = 0,
size_t sampleStride = 0,
int xSampling = 1,
int ySampling = 1,
bool fill = false,
bool skip = false,
double fillValue = 0.0);
};
InSliceInfo::InSliceInfo (PixelType tifb,
char * b,
PixelType tifl,
size_t xpst,
size_t ypst,
size_t spst,
int xsm, int ysm,
bool f, bool s,
double fv)
:
typeInFrameBuffer (tifb),
typeInFile (tifl),
base(b),
xPointerStride (xpst),
yPointerStride (ypst),
sampleStride (spst),
xSampling (xsm),
ySampling (ysm),
fill (f),
skip (s),
fillValue (fv)
{
// empty
}
struct LineBuffer
{
const char * uncompressedData;
char * buffer;
Int64 packedDataSize;
Int64 unpackedDataSize;
int minY;
int maxY;
Compressor * compressor;
Compressor::Format format;
int number;
bool hasException;
string exception;
LineBuffer ();
~LineBuffer ();
inline void wait () {_sem.wait();}
inline void post () {_sem.post();}
private:
Semaphore _sem;
};
LineBuffer::LineBuffer ():
uncompressedData (0),
buffer (0),
packedDataSize (0),
compressor (0),
format (defaultFormat(compressor)),
number (-1),
hasException (false),
exception (),
_sem (1)
{
// empty
}
LineBuffer::~LineBuffer ()
{
if (compressor != 0)
delete compressor;
}
} // namespace
struct DeepScanLineInputFile::Data: public Mutex
{
Header header; // the image header
int version; // file's version
DeepFrameBuffer frameBuffer; // framebuffer to write into
LineOrder lineOrder; // order of the scanlines in file
int minX; // data window's min x coord
int maxX; // data window's max x coord
int minY; // data window's min y coord
int maxY; // data window's max x coord
vector<Int64> lineOffsets; // stores offsets in file for
// each line
bool fileIsComplete; // True if no scanlines are missing
// in the file
int nextLineBufferMinY; // minimum y of the next linebuffer
vector<size_t> bytesPerLine; // combined size of a line over all
// channels
vector<size_t> offsetInLineBuffer; // offset for each scanline in its
// linebuffer
vector<InSliceInfo*> slices; // info about channels in file
vector<LineBuffer*> lineBuffers; // each holds one line buffer
int linesInBuffer; // number of scanlines each buffer
// holds
int partNumber; // part number
int numThreads; // number of threads
bool multiPartBackwardSupport; // if we are reading a multipart file using single file API
MultiPartInputFile* multiPartFile; // for multipart files opened as single part
bool memoryMapped; // if the stream is memory mapped
Array2D<unsigned int> sampleCount; // the number of samples
// in each pixel
Array<unsigned int> lineSampleCount; // the number of samples
// in each line
Array<bool> gotSampleCount; // for each scanline, indicating if
// we have got its sample count table
char* sampleCountSliceBase; // pointer to the start of
// the sample count array
int sampleCountXStride; // x stride of the sample count array
int sampleCountYStride; // y stride of the sample count array
bool frameBufferValid; // set by setFrameBuffer: excepts if readPixelSampleCounts if false
Array<char> sampleCountTableBuffer;
// the buffer for sample count table
Compressor* sampleCountTableComp;
// the decompressor for sample count table
int combinedSampleSize; // total size of all channels combined: used to sanity check sample table size
int maxSampleCountTableSize;
// the max size in bytes for a pixel
// sample count table
InputStreamMutex* _streamData;
bool _deleteStream;
Data (int numThreads);
~Data ();
inline LineBuffer * getLineBuffer (int number); // hash function from line
// buffer indices into our
// vector of line buffers
};
DeepScanLineInputFile::Data::Data (int numThreads):
partNumber(-1),
numThreads(numThreads),
multiPartBackwardSupport(false),
multiPartFile(NULL),
memoryMapped(false),
frameBufferValid(false),
_streamData(NULL),
_deleteStream(false)
{
//
// We need at least one lineBuffer, but if threading is used,
// to keep n threads busy we need 2*n lineBuffers
//
lineBuffers.resize (max (1, 2 * numThreads));
for (size_t i = 0; i < lineBuffers.size(); i++)
lineBuffers[i] = 0;
sampleCountTableComp = 0;
}
DeepScanLineInputFile::Data::~Data ()
{
for (size_t i = 0; i < lineBuffers.size(); i++)
if (lineBuffers[i] != 0)
delete lineBuffers[i];
for (size_t i = 0; i < slices.size(); i++)
delete slices[i];
if (sampleCountTableComp != 0)
delete sampleCountTableComp;
if (multiPartBackwardSupport)
delete multiPartFile;
}
inline LineBuffer *
DeepScanLineInputFile::Data::getLineBuffer (int lineBufferNumber)
{
return lineBuffers[lineBufferNumber % lineBuffers.size()];
}
namespace {
void
reconstructLineOffsets (OPENEXR_IMF_INTERNAL_NAMESPACE::IStream &is,
LineOrder lineOrder,
vector<Int64> &lineOffsets)
{
Int64 position = is.tellg();
try
{
for (unsigned int i = 0; i < lineOffsets.size(); i++)
{
Int64 lineOffset = is.tellg();
int y;
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (is, y);
Int64 packed_offset;
Int64 packed_sample;
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (is, packed_offset);
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (is, packed_sample);
//next is unpacked sample table size - skip this too
Xdr::skip <StreamIO> (is, packed_offset+packed_sample+8);
if (lineOrder == INCREASING_Y)
lineOffsets[i] = lineOffset;
else
lineOffsets[lineOffsets.size() - i - 1] = lineOffset;
}
}
catch (...)
{
//
// Suppress all exceptions. This functions is
// called only to reconstruct the line offset
// table for incomplete files, and exceptions
// are likely.
//
}
is.clear();
is.seekg (position);
}
void
readLineOffsets (OPENEXR_IMF_INTERNAL_NAMESPACE::IStream &is,
LineOrder lineOrder,
vector<Int64> &lineOffsets,
bool &complete)
{
for (unsigned int i = 0; i < lineOffsets.size(); i++)
{
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (is, lineOffsets[i]);
}
complete = true;
for (unsigned int i = 0; i < lineOffsets.size(); i++)
{
if (lineOffsets[i] <= 0)
{
//
// Invalid data in the line offset table mean that
// the file is probably incomplete (the table is
// the last thing written to the file). Either
// some process is still busy writing the file,
// or writing the file was aborted.
//
// We should still be able to read the existing
// parts of the file. In order to do this, we
// have to make a sequential scan over the scan
// line data to reconstruct the line offset table.
//
complete = false;
reconstructLineOffsets (is, lineOrder, lineOffsets);
break;
}
}
}
void
readPixelData (InputStreamMutex *streamData,
DeepScanLineInputFile::Data *ifd,
int minY,
char *&buffer,
Int64 &packedDataSize,
Int64 &unpackedDataSize)
{
//
// Read a single line buffer from the input file.
//
// If the input file is not memory-mapped, we copy the pixel data into
// into the array pointed to by buffer. If the file is memory-mapped,
// then we change where buffer points to instead of writing into the
// array (hence buffer needs to be a reference to a char *).
//
int lineBufferNumber = (minY - ifd->minY) / ifd->linesInBuffer;
Int64 lineOffset = ifd->lineOffsets[lineBufferNumber];
if (lineOffset == 0)
THROW (IEX_NAMESPACE::InputExc, "Scan line " << minY << " is missing.");
//
// Seek to the start of the scan line in the file,
// if necessary.
//
if (!isMultiPart(ifd->version))
{
if (ifd->nextLineBufferMinY != minY)
streamData->is->seekg (lineOffset);
}
else
{
//
// In a multi-part file, the file pointer may have been moved by
// other parts, so we have to ask tellg() where we are.
//
if (streamData->is->tellg() != ifd->lineOffsets[lineBufferNumber])
streamData->is->seekg (lineOffset);
}
//
// Read the data block's header.
//
int yInFile;
//
// Read the part number when we are dealing with a multi-part file.
//
if (isMultiPart(ifd->version))
{
int partNumber;
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*streamData->is, partNumber);
if (partNumber != ifd->partNumber)
{
THROW (IEX_NAMESPACE::ArgExc, "Unexpected part number " << partNumber
<< ", should be " << ifd->partNumber << ".");
}
}
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*streamData->is, yInFile);
if (yInFile != minY)
throw IEX_NAMESPACE::InputExc ("Unexpected data block y coordinate.");
Int64 sampleCountTableSize;
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*streamData->is, sampleCountTableSize);
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*streamData->is, packedDataSize);
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*streamData->is, unpackedDataSize);
//
// We make a check on the data size requirements here.
// Whilst we wish to store 64bit sizes on disk, not all the compressors
// have been made to work with such data sizes and are still limited to
// using signed 32 bit (int) for the data size. As such, this version
// insists that we validate that the data size does not exceed the data
// type max limit.
// @TODO refactor the compressor code to ensure full 64-bit support.
//
int compressorMaxDataSize = std::numeric_limits<int>::max();
if (packedDataSize > Int64(compressorMaxDataSize) ||
unpackedDataSize > Int64(compressorMaxDataSize))
{
THROW (IEX_NAMESPACE::ArgExc, "This version of the library does not support "
<< "the allocation of data with size > " << compressorMaxDataSize
<< " file unpacked size :" << unpackedDataSize
<< " file packed size :" << packedDataSize << ".\n");
}
//
// Skip the pixel sample count table because we have read this data.
//
Xdr::skip <StreamIO> (*streamData->is, sampleCountTableSize);
//
// Read the pixel data.
//
if (streamData->is->isMemoryMapped ())
buffer = streamData->is->readMemoryMapped (packedDataSize);
else
{
// (TODO) check if the packed data size is too big?
// (TODO) better memory management. Don't delete buffer all the time.
if (buffer != 0) delete[] buffer;
buffer = new char[packedDataSize];
streamData->is->read (buffer, packedDataSize);
}
//
// Keep track of which scan line is the next one in
// the file, so that we can avoid redundant seekg()
// operations (seekg() can be fairly expensive).
//
if (ifd->lineOrder == INCREASING_Y)
ifd->nextLineBufferMinY = minY + ifd->linesInBuffer;
else
ifd->nextLineBufferMinY = minY - ifd->linesInBuffer;
}
//
// A LineBufferTask encapsulates the task uncompressing a set of
// scanlines (line buffer) and copying them into the frame buffer.
//
class LineBufferTask : public Task
{
public:
LineBufferTask (TaskGroup *group,
DeepScanLineInputFile::Data *ifd,
LineBuffer *lineBuffer,
int scanLineMin,
int scanLineMax);
virtual ~LineBufferTask ();
virtual void execute ();
private:
DeepScanLineInputFile::Data * _ifd;
LineBuffer * _lineBuffer;
int _scanLineMin;
int _scanLineMax;
};
LineBufferTask::LineBufferTask
(TaskGroup *group,
DeepScanLineInputFile::Data *ifd,
LineBuffer *lineBuffer,
int scanLineMin,
int scanLineMax)
:
Task (group),
_ifd (ifd),
_lineBuffer (lineBuffer),
_scanLineMin (scanLineMin),
_scanLineMax (scanLineMax)
{
// empty
}
LineBufferTask::~LineBufferTask ()
{
//
// Signal that the line buffer is now free
//
_lineBuffer->post ();
}
void
LineBufferTask::execute ()
{
try
{
//
// Uncompress the data, if necessary
//
if (_lineBuffer->uncompressedData == 0)
{
Int64 uncompressedSize = 0;
int maxY = min (_lineBuffer->maxY, _ifd->maxY);
for (int i = _lineBuffer->minY - _ifd->minY;
i <= maxY - _ifd->minY;
++i)
{
uncompressedSize += (int) _ifd->bytesPerLine[i];
}
//
// Create the compressor everytime when we want to use it,
// because we don't know maxBytesPerLine beforehand.
// (TODO) optimize this. don't do this every time.
//
if (_lineBuffer->compressor != 0)
delete _lineBuffer->compressor;
Int64 maxBytesPerLine = 0;
for (int i = _lineBuffer->minY - _ifd->minY;
i <= maxY - _ifd->minY;
++i)
{
if (_ifd->bytesPerLine[i] > maxBytesPerLine)
maxBytesPerLine = _ifd->bytesPerLine[i];
}
_lineBuffer->compressor = newCompressor(_ifd->header.compression(),
maxBytesPerLine,
_ifd->header);
if (_lineBuffer->compressor &&
_lineBuffer->packedDataSize < uncompressedSize)
{
_lineBuffer->format = _lineBuffer->compressor->format();
_lineBuffer->packedDataSize = _lineBuffer->compressor->uncompress
(_lineBuffer->buffer, _lineBuffer->packedDataSize,
_lineBuffer->minY, _lineBuffer->uncompressedData);
}
else
{
//
// If the line is uncompressed, it's in XDR format,
// regardless of the compressor's output format.
//
_lineBuffer->format = Compressor::XDR;
_lineBuffer->uncompressedData = _lineBuffer->buffer;
}
}
int yStart, yStop, dy;
if (_ifd->lineOrder == INCREASING_Y)
{
yStart = _scanLineMin;
yStop = _scanLineMax + 1;
dy = 1;
}
else
{
yStart = _scanLineMax;
yStop = _scanLineMin - 1;
dy = -1;
}
for (int y = yStart; y != yStop; y += dy)
{
//
// Convert one scan line's worth of pixel data back
// from the machine-independent representation, and
// store the result in the frame buffer.
//
const char *readPtr = _lineBuffer->uncompressedData +
_ifd->offsetInLineBuffer[y - _ifd->minY];
//
// Iterate over all image channels.
//
for (unsigned int i = 0; i < _ifd->slices.size(); ++i)
{
//
// Test if scan line y of this channel contains any data
// (the scan line contains data only if y % ySampling == 0).
//
InSliceInfo &slice = *_ifd->slices[i];
if (modp (y, slice.ySampling) != 0)
continue;
//
// Find the x coordinates of the leftmost and rightmost
// sampled pixels (i.e. pixels within the data window
// for which x % xSampling == 0).
//
//
// Fill the frame buffer with pixel data.
//
if (slice.skip)
{
//
// The file contains data for this channel, but
// the frame buffer contains no slice for this channel.
//
skipChannel (readPtr, slice.typeInFile,
_ifd->lineSampleCount[y - _ifd->minY]);
}
else
{
//
// The frame buffer contains a slice for this channel.
//
int width = (_ifd->maxX - _ifd->minX + 1);
copyIntoDeepFrameBuffer (readPtr, slice.base,
(char*) (&_ifd->sampleCount[0][0]
- _ifd->minX
- _ifd->minY * width),
sizeof(unsigned int) * 1,
sizeof(unsigned int) * width,
y, _ifd->minX, _ifd->maxX,
0, 0,
0, 0,
slice.sampleStride,
slice.xPointerStride,
slice.yPointerStride,
slice.fill,
slice.fillValue, _lineBuffer->format,
slice.typeInFrameBuffer,
slice.typeInFile);
}
}
}
}
catch (std::exception &e)
{
if (!_lineBuffer->hasException)
{
_lineBuffer->exception = e.what();
_lineBuffer->hasException = true;
}
}
catch (...)
{
if (!_lineBuffer->hasException)
{
_lineBuffer->exception = "unrecognized exception";
_lineBuffer->hasException = true;
}
}
}
LineBufferTask *
newLineBufferTask
(TaskGroup *group,
DeepScanLineInputFile::Data *ifd,
int number,
int scanLineMin,
int scanLineMax)
{
//
// Wait for a line buffer to become available, fill the line
// buffer with raw data from the file if necessary, and create
// a new LineBufferTask whose execute() method will uncompress
// the contents of the buffer and copy the pixels into the
// frame buffer.
//
LineBuffer *lineBuffer = ifd->getLineBuffer (number);
try
{
lineBuffer->wait ();
if (lineBuffer->number != number)
{
lineBuffer->minY = ifd->minY + number * ifd->linesInBuffer;
lineBuffer->maxY = lineBuffer->minY + ifd->linesInBuffer - 1;
lineBuffer->number = number;
lineBuffer->uncompressedData = 0;
readPixelData (ifd->_streamData, ifd, lineBuffer->minY,
lineBuffer->buffer,
lineBuffer->packedDataSize,
lineBuffer->unpackedDataSize);
}
}
catch (std::exception &e)
{
if (!lineBuffer->hasException)
{
lineBuffer->exception = e.what();
lineBuffer->hasException = true;
}
lineBuffer->number = -1;
lineBuffer->post();
throw;
}
catch (...)
{
//
// Reading from the file caused an exception.
// Signal that the line buffer is free, and
// re-throw the exception.
//
lineBuffer->exception = "unrecognized exception";
lineBuffer->hasException = true;
lineBuffer->number = -1;
lineBuffer->post();
throw;
}
scanLineMin = max (lineBuffer->minY, scanLineMin);
scanLineMax = min (lineBuffer->maxY, scanLineMax);
return new LineBufferTask (group, ifd, lineBuffer,
scanLineMin, scanLineMax);
}
} // namespace
void DeepScanLineInputFile::initialize(const Header& header)
{
try
{
if (header.type() != DEEPSCANLINE)
throw IEX_NAMESPACE::ArgExc("Can't build a DeepScanLineInputFile from "
"a type-mismatched part.");
if(header.version()!=1)
{
THROW(IEX_NAMESPACE::ArgExc, "Version " << header.version() << " not supported for deepscanline images in this version of the library");
}
_data->header = header;
_data->lineOrder = _data->header.lineOrder();
const Box2i &dataWindow = _data->header.dataWindow();
_data->minX = dataWindow.min.x;
_data->maxX = dataWindow.max.x;
_data->minY = dataWindow.min.y;
_data->maxY = dataWindow.max.y;
_data->sampleCount.resizeErase(_data->maxY - _data->minY + 1,
_data->maxX - _data->minX + 1);
_data->lineSampleCount.resizeErase(_data->maxY - _data->minY + 1);
Compressor* compressor = newCompressor(_data->header.compression(),
0,
_data->header);
_data->linesInBuffer = numLinesInBuffer (compressor);
delete compressor;
_data->nextLineBufferMinY = _data->minY - 1;
int lineOffsetSize = (dataWindow.max.y - dataWindow.min.y +
_data->linesInBuffer) / _data->linesInBuffer;
_data->lineOffsets.resize (lineOffsetSize);
for (size_t i = 0; i < _data->lineBuffers.size(); i++)
_data->lineBuffers[i] = new LineBuffer ();
_data->gotSampleCount.resizeErase(_data->maxY - _data->minY + 1);
for (int i = 0; i < _data->maxY - _data->minY + 1; i++)
_data->gotSampleCount[i] = false;
_data->maxSampleCountTableSize = min(_data->linesInBuffer, _data->maxY - _data->minY + 1) *
(_data->maxX - _data->minX + 1) *
sizeof(unsigned int);
_data->sampleCountTableBuffer.resizeErase(_data->maxSampleCountTableSize);
_data->sampleCountTableComp = newCompressor(_data->header.compression(),
_data->maxSampleCountTableSize,
_data->header);
_data->bytesPerLine.resize (_data->maxY - _data->minY + 1);
const ChannelList & c=header.channels();
_data->combinedSampleSize=0;
for(ChannelList::ConstIterator i=c.begin();i!=c.end();i++)
{
switch(i.channel().type)
{
case OPENEXR_IMF_INTERNAL_NAMESPACE::HALF :
_data->combinedSampleSize+=Xdr::size<half>();
break;
case OPENEXR_IMF_INTERNAL_NAMESPACE::FLOAT :
_data->combinedSampleSize+=Xdr::size<float>();
break;
case OPENEXR_IMF_INTERNAL_NAMESPACE::UINT :
_data->combinedSampleSize+=Xdr::size<unsigned int>();
break;
default :
THROW(IEX_NAMESPACE::ArgExc, "Bad type for channel " << i.name() << " initializing deepscanline reader");
}
}
}
catch (...)
{
delete _data;
_data=NULL;
throw;
}
}
DeepScanLineInputFile::DeepScanLineInputFile(InputPartData* part)
{
_data = new Data(part->numThreads);
_data->_deleteStream=false;
_data->_streamData = part->mutex;
_data->memoryMapped = _data->_streamData->is->isMemoryMapped();
_data->version = part->version;
initialize(part->header);
_data->lineOffsets = part->chunkOffsets;
_data->partNumber = part->partNumber;
}
DeepScanLineInputFile::DeepScanLineInputFile
(const char fileName[], int numThreads)
:
_data (new Data (numThreads))
{
_data->_streamData = new InputStreamMutex();
_data->_deleteStream = true;
OPENEXR_IMF_INTERNAL_NAMESPACE::IStream* is = 0;
try
{
is = new StdIFStream (fileName);
readMagicNumberAndVersionField(*is, _data->version);
//
// Backward compatibility to read multpart file.
//
if (isMultiPart(_data->version))
{
compatibilityInitialize(*is);
return;
}
_data->_streamData->is = is;
_data->memoryMapped = is->isMemoryMapped();
_data->header.readFrom (*_data->_streamData->is, _data->version);
_data->header.sanityCheck (isTiled (_data->version));
initialize(_data->header);
readLineOffsets (*_data->_streamData->is,
_data->lineOrder,
_data->lineOffsets,
_data->fileIsComplete);
}
catch (IEX_NAMESPACE::BaseExc &e)
{
if (is) delete is;
if (_data && _data->_streamData) delete _data->_streamData;
if (_data) delete _data;
REPLACE_EXC (e, "Cannot read image file "
"\"" << fileName << "\". " << e.what());
throw;
}
catch (...)
{
if (is) delete is;
if (_data && _data->_streamData) delete _data->_streamData;
if (_data) delete _data;
throw;
}
}
DeepScanLineInputFile::DeepScanLineInputFile
(const Header &header,
OPENEXR_IMF_INTERNAL_NAMESPACE::IStream *is,
int version,
int numThreads)
:
_data (new Data (numThreads))
{
_data->_streamData=new InputStreamMutex();
_data->_deleteStream=false;
_data->_streamData->is = is;
_data->memoryMapped = is->isMemoryMapped();
_data->version =version;
initialize (header);
readLineOffsets (*_data->_streamData->is,
_data->lineOrder,
_data->lineOffsets,
_data->fileIsComplete);
}
DeepScanLineInputFile::~DeepScanLineInputFile ()
{
if (_data->_deleteStream)
delete _data->_streamData->is;
if (_data)
{
if (!_data->memoryMapped)
for (size_t i = 0; i < _data->lineBuffers.size(); i++)
delete [] _data->lineBuffers[i]->buffer;
//
// Unless this file was opened via the multipart API, delete the streamdata
// object too.
// (TODO) it should be "isMultiPart(data->version)", but when there is only
// single part,
// (see the above constructor) the version field is not set.
//
// (TODO) we should have a way to tell if the stream data is owned by this
// file or by a parent multipart file.
//
if (_data->partNumber == -1 && _data->_streamData)
delete _data->_streamData;
delete _data;
}
}
void
DeepScanLineInputFile::compatibilityInitialize(OPENEXR_IMF_INTERNAL_NAMESPACE::IStream& is)
{
is.seekg(0);
//
// Construct a MultiPartInputFile, initialize TiledInputFile
// with the part 0 data.
// (TODO) maybe change the third parameter of the constructor of MultiPartInputFile later.
//
_data->multiPartBackwardSupport = true;
_data->multiPartFile = new MultiPartInputFile(is, _data->numThreads);
InputPartData* part = _data->multiPartFile->getPart(0);
multiPartInitialize(part);
}
void DeepScanLineInputFile::multiPartInitialize(InputPartData* part)
{
_data->_streamData = part->mutex;
_data->memoryMapped = _data->_streamData->is->isMemoryMapped();
_data->version = part->version;
initialize(part->header);
_data->lineOffsets = part->chunkOffsets;
_data->partNumber = part->partNumber;
}
const char *
DeepScanLineInputFile::fileName () const
{
return _data->_streamData->is->fileName();
}
const Header &
DeepScanLineInputFile::header () const
{
return _data->header;
}
int
DeepScanLineInputFile::version () const
{
return _data->version;
}
void
DeepScanLineInputFile::setFrameBuffer (const DeepFrameBuffer &frameBuffer)
{
Lock lock (*_data->_streamData);
//
// Check if the new frame buffer descriptor is
// compatible with the image file header.
//
const ChannelList &channels = _data->header.channels();
for (DeepFrameBuffer::ConstIterator j = frameBuffer.begin();
j != frameBuffer.end();
++j)
{
ChannelList::ConstIterator i = channels.find (j.name());
if (i == channels.end())
continue;
if (i.channel().xSampling != j.slice().xSampling ||
i.channel().ySampling != j.slice().ySampling)
THROW (IEX_NAMESPACE::ArgExc, "X and/or y subsampling factors "
"of \"" << i.name() << "\" channel "
"of input file \"" << fileName() << "\" are "
"not compatible with the frame buffer's "
"subsampling factors.");
}
//
// Store the pixel sample count table.
// (TODO) Support for different sampling rates?
//
const Slice& sampleCountSlice = frameBuffer.getSampleCountSlice();
if (sampleCountSlice.base == 0)
{
throw IEX_NAMESPACE::ArgExc ("Invalid base pointer, please set a proper sample count slice.");
}
else
{
_data->sampleCountSliceBase = sampleCountSlice.base;
_data->sampleCountXStride = sampleCountSlice.xStride;
_data->sampleCountYStride = sampleCountSlice.yStride;
}
//
// Initialize the slice table for readPixels().
//
vector<InSliceInfo*> slices;
ChannelList::ConstIterator i = channels.begin();
for (DeepFrameBuffer::ConstIterator j = frameBuffer.begin();
j != frameBuffer.end();
++j)
{
while (i != channels.end() && strcmp (i.name(), j.name()) < 0)
{
//
// Channel i is present in the file but not
// in the frame buffer; data for channel i
// will be skipped during readPixels().
//
slices.push_back (new InSliceInfo (i.channel().type,
NULL,
i.channel().type,
0,
0,
0, // sampleStride
i.channel().xSampling,
i.channel().ySampling,
false, // fill
true, // skip
0.0)); // fillValue
++i;
}
bool fill = false;
if (i == channels.end() || strcmp (i.name(), j.name()) > 0)
{
//
// Channel i is present in the frame buffer, but not in the file.
// In the frame buffer, slice j will be filled with a default value.
//
fill = true;
}
slices.push_back (new InSliceInfo (j.slice().type,
j.slice().base,
fill? j.slice().type:
i.channel().type,
j.slice().xStride,
j.slice().yStride,
j.slice().sampleStride,
j.slice().xSampling,
j.slice().ySampling,
fill,
false, // skip
j.slice().fillValue));
if (i != channels.end() && !fill)
++i;
}
//
// Client may want data to be filled in multiple arrays,
// so we reset gotSampleCount and bytesPerLine.
//
for (long i = 0; i < _data->gotSampleCount.size(); i++)
_data->gotSampleCount[i] = false;
for (size_t i = 0; i < _data->bytesPerLine.size(); i++)
_data->bytesPerLine[i] = 0;
//
// Store the new frame buffer.
//
_data->frameBuffer = frameBuffer;
for (size_t i = 0; i < _data->slices.size(); i++)
delete _data->slices[i];
_data->slices = slices;
_data->frameBufferValid = true;
}
const DeepFrameBuffer &
DeepScanLineInputFile::frameBuffer () const
{
Lock lock (*_data->_streamData);
return _data->frameBuffer;
}
bool
DeepScanLineInputFile::isComplete () const
{
return _data->fileIsComplete;
}
void
DeepScanLineInputFile::readPixels (int scanLine1, int scanLine2)
{
try
{
Lock lock (*_data->_streamData);
if (_data->slices.size() == 0)
throw IEX_NAMESPACE::ArgExc ("No frame buffer specified "
"as pixel data destination.");
int scanLineMin = min (scanLine1, scanLine2);
int scanLineMax = max (scanLine1, scanLine2);
if (scanLineMin < _data->minY || scanLineMax > _data->maxY)
throw IEX_NAMESPACE::ArgExc ("Tried to read scan line outside "
"the image file's data window.");
for (int i = scanLineMin; i <= scanLineMax; i++)
{
if (_data->gotSampleCount[i - _data->minY] == false)
throw IEX_NAMESPACE::ArgExc ("Tried to read scan line without "
"knowing the sample counts, please"
"read the sample counts first.");
}
//
// We impose a numbering scheme on the lineBuffers where the first
// scanline is contained in lineBuffer 1.
//
// Determine the first and last lineBuffer numbers in this scanline
// range. We always attempt to read the scanlines in the order that
// they are stored in the file.
//
int start, stop, dl;
if (_data->lineOrder == INCREASING_Y)
{
start = (scanLineMin - _data->minY) / _data->linesInBuffer;
stop = (scanLineMax - _data->minY) / _data->linesInBuffer + 1;
dl = 1;
}
else
{
start = (scanLineMax - _data->minY) / _data->linesInBuffer;
stop = (scanLineMin - _data->minY) / _data->linesInBuffer - 1;
dl = -1;
}
//
// Create a task group for all line buffer tasks. When the
// task group goes out of scope, the destructor waits until
// all tasks are complete.
//
{
TaskGroup taskGroup;
//
// Add the line buffer tasks.
//
// The tasks will execute in the order that they are created
// because we lock the line buffers during construction and the
// constructors are called by the main thread. Hence, in order
// for a successive task to execute the previous task which
// used that line buffer must have completed already.
//
for (int l = start; l != stop; l += dl)
{
ThreadPool::addGlobalTask (newLineBufferTask (&taskGroup,
_data, l,
scanLineMin,
scanLineMax));
}
//
// finish all tasks
//
}
//
// Exeption handling:
//
// LineBufferTask::execute() may have encountered exceptions, but
// those exceptions occurred in another thread, not in the thread
// that is executing this call to ScanLineInputFile::readPixels().
// LineBufferTask::execute() has caught all exceptions and stored
// the exceptions' what() strings in the line buffers.
// Now we check if any line buffer contains a stored exception; if
// this is the case then we re-throw the exception in this thread.
// (It is possible that multiple line buffers contain stored
// exceptions. We re-throw the first exception we find and
// ignore all others.)
//
const string *exception = 0;
for (size_t i = 0; i < _data->lineBuffers.size(); ++i)
{
LineBuffer *lineBuffer = _data->lineBuffers[i];
if (lineBuffer->hasException && !exception)
exception = &lineBuffer->exception;
lineBuffer->hasException = false;
}
if (exception)
throw IEX_NAMESPACE::IoExc (*exception);
}
catch (IEX_NAMESPACE::BaseExc &e)
{
REPLACE_EXC (e, "Error reading pixel data from image "
"file \"" << fileName() << "\". " << e.what());
throw;
}
}
void
DeepScanLineInputFile::readPixels (int scanLine)
{
readPixels (scanLine, scanLine);
}
void
DeepScanLineInputFile::rawPixelData (int firstScanLine,
char *pixelData,
Int64 &pixelDataSize)
{
int minY = lineBufferMinY
(firstScanLine, _data->minY, _data->linesInBuffer);
int lineBufferNumber = (minY - _data->minY) / _data->linesInBuffer;
Int64 lineOffset = _data->lineOffsets[lineBufferNumber];
if (lineOffset == 0)
THROW (IEX_NAMESPACE::InputExc, "Scan line " << minY << " is missing.");
// enter the lock here - prevent another thread reseeking the file during read
Lock lock (*_data->_streamData);
//
// Seek to the start of the scan line in the file,
//
if (_data->_streamData->is->tellg() != _data->lineOffsets[lineBufferNumber])
_data->_streamData->is->seekg (lineOffset);
//
// Read the data block's header.
//
int yInFile;
//
// Read the part number when we are dealing with a multi-part file.
//
if (isMultiPart(_data->version))
{
int partNumber;
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*_data->_streamData->is, partNumber);
if (partNumber != _data->partNumber)
{
THROW (IEX_NAMESPACE::ArgExc, "Unexpected part number " << partNumber
<< ", should be " << _data->partNumber << ".");
}
}
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*_data->_streamData->is, yInFile);
if (yInFile != minY)
throw IEX_NAMESPACE::InputExc ("Unexpected data block y coordinate.");
Int64 sampleCountTableSize;
Int64 packedDataSize;
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*_data->_streamData->is, sampleCountTableSize);
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*_data->_streamData->is, packedDataSize);
// total requirement for reading all the data
Int64 totalSizeRequired=28+sampleCountTableSize+packedDataSize;
bool big_enough = totalSizeRequired<=pixelDataSize;
pixelDataSize = totalSizeRequired;
// was the block we were given big enough?
if(!big_enough || pixelData==NULL)
{
// special case: seek stream back to start if we are at the beginning (regular reading pixels assumes it doesn't need to seek
// in single part files)
if(!isMultiPart(_data->version))
{
if (_data->nextLineBufferMinY == minY)
_data->_streamData->is->seekg (lineOffset);
}
// leave lock here - bail before reading more data
return;
}
// copy the values we have read into the output block
*(int *) pixelData = yInFile;
*(Int64 *) (pixelData+4) =sampleCountTableSize;
*(Int64 *) (pixelData+12) = packedDataSize;
// didn't read the unpackedsize - do that now
Xdr::read<StreamIO> (*_data->_streamData->is, *(Int64 *) (pixelData+20));
// read the actual data
_data->_streamData->is->read(pixelData+28, sampleCountTableSize+packedDataSize);
// special case: seek stream back to start if we are at the beginning (regular reading pixels assumes it doesn't need to seek
// in single part files)
if(!isMultiPart(_data->version))
{
if (_data->nextLineBufferMinY == minY)
_data->_streamData->is->seekg (lineOffset);
}
// leave lock here
}
void DeepScanLineInputFile::readPixels (const char* rawPixelData,
const DeepFrameBuffer& frameBuffer,
int scanLine1,
int scanLine2) const
{
//
// read header from block - already converted from Xdr to native format
//
int data_scanline = *(int *) rawPixelData;
Int64 sampleCountTableDataSize=*(Int64 *) (rawPixelData+4);
Int64 packedDataSize = *(Int64 *) (rawPixelData+12);
Int64 unpackedDataSize = *(Int64 *) (rawPixelData+20);
//
// Uncompress the data, if necessary
//
Compressor * decomp = NULL;
const char * uncompressed_data;
Compressor::Format format = Compressor::XDR;
if(packedDataSize <unpackedDataSize)
{
decomp = newCompressor(_data->header.compression(),
unpackedDataSize,
_data->header);
decomp->uncompress(rawPixelData+28+sampleCountTableDataSize,
packedDataSize,
data_scanline, uncompressed_data);
format = decomp->format();
}
else
{
//
// If the line is uncompressed, it's in XDR format,
// regardless of the compressor's output format.
//
format = Compressor::XDR;
uncompressed_data = rawPixelData+28+sampleCountTableDataSize;
}
int yStart, yStop, dy;
if (_data->lineOrder == INCREASING_Y)
{
yStart = scanLine1;
yStop = scanLine2 + 1;
dy = 1;
}
else
{
yStart = scanLine2;
yStop = scanLine1 - 1;
dy = -1;
}
const char* samplecount_base = frameBuffer.getSampleCountSlice().base;
int samplecount_xstride = frameBuffer.getSampleCountSlice().xStride;
int samplecount_ystride = frameBuffer.getSampleCountSlice().yStride;
//
// For each line within the block, get the count of bytes.
//
int minYInLineBuffer = data_scanline;
int maxYInLineBuffer = min(minYInLineBuffer + _data->linesInBuffer - 1, _data->maxY);
vector<size_t> bytesPerLine(1+_data->maxY-_data->minY);
bytesPerDeepLineTable (_data->header,
minYInLineBuffer,
maxYInLineBuffer,
samplecount_base,
samplecount_xstride,
samplecount_ystride,
bytesPerLine);
//
// For each scanline within the block, get the offset.
//
vector<size_t> offsetInLineBuffer;
offsetInLineBufferTable (bytesPerLine,
minYInLineBuffer - _data->minY,
maxYInLineBuffer - _data->minY,
_data->linesInBuffer,
offsetInLineBuffer);
const ChannelList & channels=header().channels();
for (int y = yStart; y != yStop; y += dy)
{
const char *readPtr =uncompressed_data +
offsetInLineBuffer[y - _data->minY];
//
// need to know the total number of samples on a scanline to skip channels
// compute on demand: -1 means uncomputed
//
int lineSampleCount = -1;
//
// Iterate over all image channels in frame buffer
//
ChannelList::ConstIterator i = channels.begin();
for (DeepFrameBuffer::ConstIterator j = frameBuffer.begin();
j != frameBuffer.end();
++j)
{
while (i != channels.end() && strcmp (i.name(), j.name()) < 0)
{
//
// Channel i is present in the file but not
// in the frame buffer; skip
if(lineSampleCount==-1)
{
lineSampleCount=0;
const char * ptr = (samplecount_base+y*samplecount_ystride + samplecount_xstride*_data->minX);
for(int x=_data->minX;x<=_data->maxX;x++)
{
lineSampleCount+=*(const unsigned int *) ptr;
ptr+=samplecount_xstride;
}
}
skipChannel (readPtr, i.channel().type, lineSampleCount );
++i;
}
bool fill = false;
if (i == channels.end() || strcmp (i.name(), j.name()) > 0)
{
//
// Channel i is present in the frame buffer, but not in the file.
// In the frame buffer, slice j will be filled with a default value.
//
fill = true;
}
if (modp (y, i.channel().ySampling) == 0)
{
copyIntoDeepFrameBuffer (readPtr, j.slice().base,
samplecount_base,
samplecount_xstride,
samplecount_ystride,
y, _data->minX, _data->maxX,
0, 0,
0, 0,
j.slice().sampleStride,
j.slice().xStride,
j.slice().yStride,
fill,
j.slice().fillValue,
format,
j.slice().type,
i.channel().type);
++i;
}
}//next slice in framebuffer
}//next row in image
//
// clean up
//
delete decomp;
}
void DeepScanLineInputFile::readPixelSampleCounts (const char* rawPixelData,
const DeepFrameBuffer& frameBuffer,
int scanLine1,
int scanLine2) const
{
//
// read header from block - already converted from Xdr to native format
//
int data_scanline = *(int *) rawPixelData;
Int64 sampleCountTableDataSize=*(Int64 *) (rawPixelData+4);
int maxY;
maxY = min(data_scanline + _data->linesInBuffer - 1, _data->maxY);
if(scanLine1 != data_scanline)
{
THROW(IEX_NAMESPACE::ArgExc,"readPixelSampleCounts(rawPixelData,frameBuffer,"<< scanLine1 << ',' << scanLine2 << ") called with incorrect start scanline - should be " << data_scanline );
}
if(scanLine2 != maxY)
{
THROW(IEX_NAMESPACE::ArgExc,"readPixelSampleCounts(rawPixelData,frameBuffer,"<< scanLine1 << ',' << scanLine2 << ") called with incorrect end scanline - should be " << maxY );
}
//
// If the sample count table is compressed, we'll uncompress it.
//
Int64 rawSampleCountTableSize = (maxY - data_scanline + 1) * (_data->maxX - _data->minX + 1) *
Xdr::size <unsigned int> ();
Compressor * decomp=NULL;
const char* readPtr;
if (sampleCountTableDataSize < rawSampleCountTableSize)
{
decomp = newCompressor(_data->header.compression(),
rawSampleCountTableSize,
_data->header);
decomp->uncompress(rawPixelData+28,
sampleCountTableDataSize,
data_scanline,
readPtr);
}
else readPtr = rawPixelData+28;
char* base = frameBuffer.getSampleCountSlice().base;
int xStride = frameBuffer.getSampleCountSlice().xStride;
int yStride = frameBuffer.getSampleCountSlice().yStride;
for (int y = scanLine1; y <= scanLine2; y++)
{
int lastAccumulatedCount = 0;
for (int x = _data->minX; x <= _data->maxX; x++)
{
int accumulatedCount, count;
//
// Read the sample count for pixel (x, y).
//
Xdr::read <CharPtrIO> (readPtr, accumulatedCount);
if (x == _data->minX)
count = accumulatedCount;
else
count = accumulatedCount - lastAccumulatedCount;
lastAccumulatedCount = accumulatedCount;
//
// Store the data in both internal and external data structure.
//
sampleCount(base, xStride, yStride, x, y) = count;
}
}
if(decomp)
{
delete decomp;
}
}
namespace
{
void
readSampleCountForLineBlock(InputStreamMutex* streamData,
DeepScanLineInputFile::Data* data,
int lineBlockId)
{
streamData->is->seekg(data->lineOffsets[lineBlockId]);
if (isMultiPart(data->version))
{
int partNumber;
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*streamData->is, partNumber);
if (partNumber != data->partNumber)
throw IEX_NAMESPACE::ArgExc("Unexpected part number.");
}
int minY;
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*streamData->is, minY);
//
// Check the correctness of minY.
//
if (minY != data->minY + lineBlockId * data->linesInBuffer)
throw IEX_NAMESPACE::ArgExc("Unexpected data block y coordinate.");
int maxY;
maxY = min(minY + data->linesInBuffer - 1, data->maxY);
Int64 sampleCountTableDataSize;
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*streamData->is, sampleCountTableDataSize);
if(sampleCountTableDataSize>data->maxSampleCountTableSize)
{
THROW (IEX_NAMESPACE::ArgExc, "Bad sampleCountTableDataSize read from chunk "<< lineBlockId << ": expected " << data->maxSampleCountTableSize << " or less, got "<< sampleCountTableDataSize);
}
Int64 packedDataSize;
Int64 unpackedDataSize;
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*streamData->is, packedDataSize);
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (*streamData->is, unpackedDataSize);
//
// We make a check on the data size requirements here.
// Whilst we wish to store 64bit sizes on disk, not all the compressors
// have been made to work with such data sizes and are still limited to
// using signed 32 bit (int) for the data size. As such, this version
// insists that we validate that the data size does not exceed the data
// type max limit.
// @TODO refactor the compressor code to ensure full 64-bit support.
//
int compressorMaxDataSize = std::numeric_limits<int>::max();
if (sampleCountTableDataSize > Int64(compressorMaxDataSize))
{
THROW (IEX_NAMESPACE::ArgExc, "This version of the library does not "
<< "support the allocation of data with size > "
<< compressorMaxDataSize
<< " file table size :" << sampleCountTableDataSize << ".\n");
}
streamData->is->read(data->sampleCountTableBuffer, sampleCountTableDataSize);
const char* readPtr;
//
// If the sample count table is compressed, we'll uncompress it.
//
if (sampleCountTableDataSize < data->maxSampleCountTableSize)
{
if(!data->sampleCountTableComp)
{
THROW(IEX_NAMESPACE::ArgExc,"Deep scanline data corrupt at chunk " << lineBlockId << " (sampleCountTableDataSize error)");
}
data->sampleCountTableComp->uncompress(data->sampleCountTableBuffer,
sampleCountTableDataSize,
minY,
readPtr);
}
else readPtr = data->sampleCountTableBuffer;
char* base = data->sampleCountSliceBase;
int xStride = data->sampleCountXStride;
int yStride = data->sampleCountYStride;
// total number of samples in block: used to check samplecount table doesn't
// reference more data than exists
size_t cumulative_total_samples=0;
for (int y = minY; y <= maxY; y++)
{
int yInDataWindow = y - data->minY;
data->lineSampleCount[yInDataWindow] = 0;
int lastAccumulatedCount = 0;
for (int x = data->minX; x <= data->maxX; x++)
{
int accumulatedCount, count;
//
// Read the sample count for pixel (x, y).
//
Xdr::read <CharPtrIO> (readPtr, accumulatedCount);
// sample count table should always contain monotonically
// increasing values.
if (accumulatedCount < lastAccumulatedCount)
{
THROW(IEX_NAMESPACE::ArgExc,"Deep scanline sampleCount data corrupt at chunk " << lineBlockId << " (negative sample count detected)");
}
count = accumulatedCount - lastAccumulatedCount;
lastAccumulatedCount = accumulatedCount;
//
// Store the data in both internal and external data structure.
//
data->sampleCount[yInDataWindow][x - data->minX] = count;
data->lineSampleCount[yInDataWindow] += count;
sampleCount(base, xStride, yStride, x, y) = count;
}
cumulative_total_samples+=data->lineSampleCount[yInDataWindow];
if(cumulative_total_samples*data->combinedSampleSize > unpackedDataSize)
{
THROW(IEX_NAMESPACE::ArgExc,"Deep scanline sampleCount data corrupt at chunk " << lineBlockId << ": pixel data only contains " << unpackedDataSize
<< " bytes of data but table references at least " << cumulative_total_samples*data->combinedSampleSize << " bytes of sample data" );
}
data->gotSampleCount[y - data->minY] = true;
}
}
void
fillSampleCountFromCache(int y, DeepScanLineInputFile::Data* data)
{
int yInDataWindow = y - data->minY;
char* base = data->sampleCountSliceBase;
int xStride = data->sampleCountXStride;
int yStride = data->sampleCountYStride;
for (int x = data->minX; x <= data->maxX; x++)
{
unsigned int count = data->sampleCount[yInDataWindow][x - data->minX];
sampleCount(base, xStride, yStride, x, y) = count;
}
}
} // namespace
void
DeepScanLineInputFile::readPixelSampleCounts (int scanline1, int scanline2)
{
Int64 savedFilePos = 0;
if(!_data->frameBufferValid)
{
throw IEX_NAMESPACE::ArgExc("readPixelSampleCounts called with no valid frame buffer");
}
try
{
Lock lock (*_data->_streamData);
savedFilePos = _data->_streamData->is->tellg();
int scanLineMin = min (scanline1, scanline2);
int scanLineMax = max (scanline1, scanline2);
if (scanLineMin < _data->minY || scanLineMax > _data->maxY)
throw IEX_NAMESPACE::ArgExc ("Tried to read scan line sample counts outside "
"the image file's data window.");
for (int i = scanLineMin; i <= scanLineMax; i++)
{
//
// if scanline is already read, it'll be in the cache
// otherwise, read from file, store in cache and in caller's framebuffer
//
if (_data->gotSampleCount[i - _data->minY])
{
fillSampleCountFromCache(i,_data);
}else{
int lineBlockId = ( i - _data->minY ) / _data->linesInBuffer;
readSampleCountForLineBlock ( _data->_streamData, _data, lineBlockId );
int minYInLineBuffer = lineBlockId * _data->linesInBuffer + _data->minY;
int maxYInLineBuffer = min ( minYInLineBuffer + _data->linesInBuffer - 1, _data->maxY );
//
// For each line within the block, get the count of bytes.
//
bytesPerDeepLineTable ( _data->header,
minYInLineBuffer,
maxYInLineBuffer,
_data->sampleCountSliceBase,
_data->sampleCountXStride,
_data->sampleCountYStride,
_data->bytesPerLine );
//
// For each scanline within the block, get the offset.
//
offsetInLineBufferTable ( _data->bytesPerLine,
minYInLineBuffer - _data->minY,
maxYInLineBuffer - _data->minY,
_data->linesInBuffer,
_data->offsetInLineBuffer );
}
}
_data->_streamData->is->seekg(savedFilePos);
}
catch (IEX_NAMESPACE::BaseExc &e)
{
REPLACE_EXC (e, "Error reading sample count data from image "
"file \"" << fileName() << "\". " << e.what());
_data->_streamData->is->seekg(savedFilePos);
throw;
}
}
void
DeepScanLineInputFile::readPixelSampleCounts(int scanline)
{
readPixelSampleCounts(scanline, scanline);
}
int
DeepScanLineInputFile::firstScanLineInChunk(int y) const
{
return int((y-_data->minY)/_data->linesInBuffer)*_data->linesInBuffer + _data->minY;
}
int
DeepScanLineInputFile::lastScanLineInChunk(int y) const
{
int minY = firstScanLineInChunk(y);
return min(minY+_data->linesInBuffer-1,_data->maxY);
}
OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT
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