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VolumetricDataSource.cpp
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/*
* VolumetricDataSource.cpp
*
* Copyright (C) 2014 by Visualisierungsinstitut der Universit�t Stuttgart.
* Alle rechte vorbehalten.
*/
#include "VolumetricDataSource.h"
#include "mmcore/param/BoolParam.h"
#include "mmcore/param/EnumParam.h"
#include "mmcore/param/FilePathParam.h"
#include "mmcore/param/FloatParam.h"
#include "mmcore/param/IntParam.h"
#include "mmcore/param/StringParam.h"
#include "mmcore/utility/log/Log.h"
#define STATIC_ARRAY_COUNT(ary) (sizeof(ary) / sizeof(*(ary)))
#ifndef FALSE
#define FALSE (0)
#endif /* !FALSE */
// static int CompareBufferSlots(
// const megamol::datraw::VolumetricDataSource::BufferSlot *& lhs,
// const megamol::datraw::VolumetricDataSource::BufferSlot *& rhs) {
//}
/*
* megamol::volume::VolumetricDataSource::VolumetricDataSource
*/
megamol::volume::VolumetricDataSource::VolumetricDataSource()
: Base()
, dataHash(-234895)
, fileInfo(nullptr)
, loaderThread(VolumetricDataSource::loadAsync)
, paramAsyncSleep("AsyncSleep", "The time in milliseconds that the loader sleeps between two frames.")
, paramAsyncWake("AsyncWake", "The time in milliseconds after that the loader wakes itself.")
, paramBuffers("Buffers", "The number of buffers for loading frames asynchronously.")
, paramFileName("FileName", "The path to the dat file to be loaded.")
, paramOutputDataSize("OutputDataSize", "Forces the scalar type to the specified size.")
, paramOutputDataType("OutputDataType", "Enforces the type of a scalar during loading.")
, paramLoadAsync("LoadAsync", "Start asynchronous loading of frames.")
, slotGetData("GetData", "Slot for requesting data from the source.") {
using geocalls::VolumetricDataCall;
core::param::EnumParam* enumParam = nullptr;
this->loaderStatus.store(LOADER_STATUS_STOPPED);
this->paramAsyncSleep.SetParameter(new core::param::IntParam(0, 0));
this->MakeSlotAvailable(&this->paramAsyncSleep);
this->paramAsyncWake.SetParameter(new core::param::IntParam(0, 0));
this->MakeSlotAvailable(&this->paramAsyncWake);
this->paramBuffers.SetParameter(new core::param::IntParam(2, 2));
this->MakeSlotAvailable(&this->paramBuffers);
this->paramFileName.SetParameter(new core::param::FilePathParam(""));
this->paramFileName.SetUpdateCallback(&VolumetricDataSource::onFileNameChanged);
this->MakeSlotAvailable(&this->paramFileName);
enumParam = new core::param::EnumParam(-1);
enumParam->SetTypePair(-1, "Auto");
enumParam->SetTypePair(1, "1 Byte/Scalar");
enumParam->SetTypePair(2, "2 Bytes/Scalar");
enumParam->SetTypePair(4, "4 Bytes/Scalar");
enumParam->SetTypePair(8, "8 Bytes/Scalar");
this->paramOutputDataSize.SetParameter(enumParam);
this->MakeSlotAvailable(&this->paramOutputDataSize);
enumParam = new core::param::EnumParam(-1);
enumParam->SetTypePair(-1, "Auto");
enumParam->SetTypePair(VolumetricDataCall::ScalarType::SIGNED_INTEGER, "int");
enumParam->SetTypePair(VolumetricDataCall::ScalarType::UNSIGNED_INTEGER, "uint");
enumParam->SetTypePair(VolumetricDataCall::ScalarType::FLOATING_POINT, "float");
this->paramOutputDataType.SetParameter(enumParam);
this->MakeSlotAvailable(&this->paramOutputDataType);
this->paramLoadAsync.SetParameter(new core::param::BoolParam(FALSE));
// this->paramLoadAsync.SetUpdateCallback(
// &VolumetricDataSource::onLoadAsyncChanged);
this->MakeSlotAvailable(&this->paramLoadAsync);
this->slotGetData.SetCallback(VolumetricDataCall::ClassName(),
VolumetricDataCall::FunctionName(VolumetricDataCall::IDX_GET_DATA), &VolumetricDataSource::onGetData);
this->slotGetData.SetCallback(VolumetricDataCall::ClassName(),
VolumetricDataCall::FunctionName(VolumetricDataCall::IDX_GET_EXTENTS), &VolumetricDataSource::onGetExtents);
this->slotGetData.SetCallback(VolumetricDataCall::ClassName(),
VolumetricDataCall::FunctionName(VolumetricDataCall::IDX_GET_METADATA), &VolumetricDataSource::onGetMetadata);
this->slotGetData.SetCallback(VolumetricDataCall::ClassName(),
VolumetricDataCall::FunctionName(VolumetricDataCall::IDX_START_ASYNC), &VolumetricDataSource::onStartAsync);
this->slotGetData.SetCallback(VolumetricDataCall::ClassName(),
VolumetricDataCall::FunctionName(VolumetricDataCall::IDX_STOP_ASYNC), &VolumetricDataSource::onStopAsync);
this->slotGetData.SetCallback(VolumetricDataCall::ClassName(),
VolumetricDataCall::FunctionName(VolumetricDataCall::IDX_TRY_GET_DATA), &VolumetricDataSource::onTryGetData);
this->MakeSlotAvailable(&this->slotGetData);
}
/*
* megamol::volume::VolumetricDataSource::~VolumetricDataSource
*/
megamol::volume::VolumetricDataSource::~VolumetricDataSource() {
this->Release();
ASSERT(this->fileInfo == nullptr);
}
/*
* megamol::volume::VolumetricDataSource::calcFrameSize
*/
size_t megamol::volume::VolumetricDataSource::calcFrameSize() const {
ASSERT(this->fileInfo != nullptr);
return ::datRaw_getBufferSize(this->fileInfo, this->getOutputDataFormat());
}
/*
* megamol::volume::VolumetricDataSource::create
*/
bool megamol::volume::VolumetricDataSource::create() {
if (!this->paramFileName.Param<core::param::FilePathParam>()->Value().empty()) {
this->onFileNameChanged(this->paramFileName);
}
return true;
}
/*
* megamol::volume::VolumetricDataSource::getOutputDataFormat
*/
DatRawDataFormat megamol::volume::VolumetricDataSource::getOutputDataFormat() const {
using geocalls::VolumetricDataCall;
using megamol::core::utility::log::Log;
auto sizeParam = this->paramOutputDataSize.Param<core::param::EnumParam>();
auto typeParam = this->paramOutputDataType.Param<core::param::EnumParam>();
VolumetricDataCall::ScalarType scalarType = (typeParam->Value() >= 0)
? static_cast<VolumetricDataCall::ScalarType>(typeParam->Value())
: this->metadata.ScalarType;
size_t scalarLength = (sizeParam->Value() >= 0) ? sizeParam->Value() : this->metadata.ScalarLength;
switch (scalarType) {
case VolumetricDataCall::ScalarType::SIGNED_INTEGER:
switch (scalarLength) {
case 1:
return DatRawDataFormat::DR_FORMAT_CHAR;
case 2:
return DatRawDataFormat::DR_FORMAT_SHORT;
case 4:
return DatRawDataFormat::DR_FORMAT_INT;
case 8:
return DatRawDataFormat::DR_FORMAT_LONG;
default:
Log::DefaultLog.WriteError("Unsupported scalar "
"length %u in combination with type %d.",
scalarLength, static_cast<std::underlying_type_t<VolumetricDataCall::ScalarType>>(scalarType));
return DatRawDataFormat::DR_FORMAT_NONE;
}
case VolumetricDataCall::ScalarType::UNSIGNED_INTEGER:
switch (scalarLength) {
case 1:
return DatRawDataFormat::DR_FORMAT_UCHAR;
case 2:
return DatRawDataFormat::DR_FORMAT_USHORT;
case 4:
return DatRawDataFormat::DR_FORMAT_UINT;
case 8:
return DatRawDataFormat::DR_FORMAT_ULONG;
default:
Log::DefaultLog.WriteError("Unsupported scalar "
"length %u in combination with type %d.",
scalarLength, static_cast<std::underlying_type_t<VolumetricDataCall::ScalarType>>(scalarType));
return DatRawDataFormat::DR_FORMAT_NONE;
}
case VolumetricDataCall::ScalarType::FLOATING_POINT:
switch (scalarLength) {
case 2:
return DatRawDataFormat::DR_FORMAT_HALF;
case 4:
return DatRawDataFormat::DR_FORMAT_FLOAT;
case 8:
return DatRawDataFormat::DR_FORMAT_DOUBLE;
default:
Log::DefaultLog.WriteError("Unsupported scalar "
"length %u in combination with type %d.",
scalarLength, static_cast<std::underlying_type_t<VolumetricDataCall::ScalarType>>(scalarType));
return DatRawDataFormat::DR_FORMAT_NONE;
}
case VolumetricDataCall::ScalarType::BITS:
return DatRawDataFormat::DR_FORMAT_RAW;
case VolumetricDataCall::ScalarType::UNKNOWN:
default:
return DatRawDataFormat::DR_FORMAT_NONE;
}
}
/*
* megamol::volume::VolumetricDataSource::onFileNameChanged
*/
bool megamol::volume::VolumetricDataSource::onFileNameChanged(core::param::ParamSlot& slot) {
using geocalls::VolumetricDataCall;
using megamol::core::utility::log::Log;
/* Allocate header or prepare it for re-use. */
if (this->fileInfo == nullptr) {
this->fileInfo = new DatRawFileInfo();
} else {
::datRaw_freeInfo(this->fileInfo);
}
bool isAsync = this->paramLoadAsync.Param<core::param::BoolParam>()->Value();
if (isAsync) {
// Cancel loading the previous data set before settings a new one.
Log::DefaultLog.WriteInfo(_T("Halting asynchronous loading thread ")
_T("in preparation for changing the data set."));
this->stopAsyncLoad(true);
Log::DefaultLog.WriteInfo(_T("Halting asynchronous loading thread ")
_T("in preparation for changing the data set."));
}
/* Read the header. */
vislib::StringA fileName(
this->paramFileName.Param<core::param::FilePathParam>()->Value().generic_u8string().c_str());
if (::datRaw_readHeader(fileName.PeekBuffer(), this->fileInfo, nullptr) != FALSE) {
Log::DefaultLog.WriteInfo(_T("Successfully loaded dat file %hs."), fileName.PeekBuffer());
static_assert(STATIC_ARRAY_COUNT(this->metadata.SliceDists) == STATIC_ARRAY_COUNT(this->metadata.Resolution),
"Dimension of "
"slice distance and resolution arrays match.");
static_assert(STATIC_ARRAY_COUNT(this->metadata.SliceDists) == STATIC_ARRAY_COUNT(this->metadata.IsUniform),
"Dimension of "
"slice distance and uniformity flag arrays match.");
int dimensions = vislib::math::Min(
static_cast<int>(STATIC_ARRAY_COUNT(this->metadata.SliceDists)), this->fileInfo->dimensions);
// Erase *all* old slice distances from heap.
::ZeroMemory(this->metadata.SliceDists, sizeof(this->metadata.SliceDists));
switch (this->fileInfo->gridType) {
case DR_GRID_CARTESIAN:
this->metadata.GridType = VolumetricDataCall::GridType::CARTESIAN;
Log::DefaultLog.WriteInfo(_T("The grid is cartesian."));
for (int i = 0; i < dimensions; ++i) {
this->metadata.SliceDists[i] = this->fileInfo->sliceDist + i;
this->metadata.IsUniform[i] = true;
Log::DefaultLog.WriteInfo(_T("The grid is uniform in ")
_T("dimension %d and has a slice distance of %f."),
i, this->metadata.SliceDists[i][0]);
}
break;
case DR_GRID_RECTILINEAR:
this->metadata.GridType = VolumetricDataCall::GridType::RECTILINEAR;
Log::DefaultLog.WriteInfo(_T("The grid is rectilinear."));
for (int i = 0, j = 0; i < dimensions; ++i) {
this->metadata.SliceDists[i] = this->fileInfo->sliceDist + j;
/* Determine uniformity of the dimension. */
this->metadata.IsUniform[i] = true;
float reference = this->fileInfo->sliceDist[j];
for (; j < this->fileInfo->resolution[i]; ++j) {
if (this->fileInfo->sliceDist[j] != reference) {
this->metadata.IsUniform[i] = false;
// Do *not* break! We need 'j' to determine the
// start of the next dimension.
}
}
Log::DefaultLog.WriteInfo(_T("The grid is%s uniform ")
_T("in dimension %d."),
this->metadata.IsUniform[i] ? _T("") : _T(" not"), i);
}
break;
case DR_GRID_TETRAHEDRAL:
this->metadata.GridType = VolumetricDataCall::GridType::TETRAHEDRAL;
Log::DefaultLog.WriteWarn(_T("The grid is tetrahedral. ")
_T("Tetrahedral grids are currently not supported."));
break;
default:
Log::DefaultLog.WriteError(_T("The data set uses the ")
_T("unexpected grid type %d."),
this->fileInfo->gridType);
case DR_GRID_NONE:
this->metadata.GridType = VolumetricDataCall::GridType::NONE;
break;
}
::ZeroMemory(&this->metadata.Resolution, sizeof(this->metadata.Resolution));
for (int i = 0; i < dimensions; ++i) {
ASSERT(this->fileInfo->resolution[i] >= 0);
this->metadata.Resolution[i] = this->fileInfo->resolution[i];
Log::DefaultLog.WriteInfo(_T("Resolution in dimension %d ")
_T("is %u."),
i, this->metadata.Resolution[i]);
}
::ZeroMemory(&this->metadata.Origin, sizeof(this->metadata.Origin));
for (int i = 0; i < dimensions; ++i) {
this->metadata.Origin[i] = this->fileInfo->origin[i];
Log::DefaultLog.WriteInfo(_T("Origin in dimension %d ")
_T("is %f."),
i, this->metadata.Origin[i]);
}
this->metadata.Components = this->fileInfo->numComponents;
Log::DefaultLog.WriteInfo(_T("Each voxel comprises %u scalars."), this->metadata.Components);
switch (this->fileInfo->dataFormat) {
case DR_FORMAT_CHAR:
case DR_FORMAT_SHORT:
case DR_FORMAT_INT:
case DR_FORMAT_LONG:
this->metadata.ScalarType = VolumetricDataCall::ScalarType::SIGNED_INTEGER;
Log::DefaultLog.WriteInfo(_T("Scalars are signed ")
_T("integers."));
break;
case DR_FORMAT_UCHAR:
case DR_FORMAT_USHORT:
case DR_FORMAT_UINT:
case DR_FORMAT_ULONG:
this->metadata.ScalarType = VolumetricDataCall::ScalarType::UNSIGNED_INTEGER;
Log::DefaultLog.WriteInfo(_T("Scalars are unsigned ")
_T("integers."));
break;
case DR_FORMAT_HALF:
case DR_FORMAT_FLOAT:
case DR_FORMAT_DOUBLE:
this->metadata.ScalarType = VolumetricDataCall::ScalarType::FLOATING_POINT;
Log::DefaultLog.WriteInfo(_T("Scalars are floating ")
_T("point numbers."));
break;
case DR_FORMAT_RAW:
this->metadata.ScalarType = VolumetricDataCall::ScalarType::BITS;
Log::DefaultLog.WriteInfo(_T("Scalars are raw bits."));
break;
case DR_FORMAT_NONE:
default:
this->metadata.ScalarType = VolumetricDataCall::ScalarType::UNKNOWN;
Log::DefaultLog.WriteWarn(_T("The type of the scalar ")
_T("values is unkown."));
break;
}
this->metadata.ScalarLength = ::datRaw_getFormatSize(this->fileInfo->dataFormat);
Log::DefaultLog.WriteInfo(_T("Scalar values comprise %u bytes."), this->metadata.ScalarLength);
this->metadata.NumberOfFrames = this->fileInfo->timeSteps;
Log::DefaultLog.WriteInfo(_T("The data set comprises %u frames."), this->metadata.NumberOfFrames);
/* Compute extents. */
::ZeroMemory(this->metadata.Extents, sizeof(this->metadata.Extents));
for (int d = 0; (d < STATIC_ARRAY_COUNT(this->metadata.Extents)) && (d < this->fileInfo->dimensions); ++d) {
switch (this->fileInfo->gridType) {
case DatRawGridType::DR_GRID_CARTESIAN:
this->metadata.Extents[d] =
this->fileInfo->sliceDist[d] * static_cast<float>(this->fileInfo->resolution[d] - 1);
break;
case DatRawGridType::DR_GRID_RECTILINEAR:
if (this->metadata.IsUniform[d]) {
this->metadata.Extents[d] =
this->fileInfo->sliceDist[d] * static_cast<float>(this->fileInfo->resolution[d] - 1);
} else {
int r = this->fileInfo->resolution[d];
this->metadata.Extents[d] = this->fileInfo->sliceDist[r - 1] * static_cast<float>(r - 1);
}
case DatRawGridType::DR_GRID_NONE:
case DatRawGridType::DR_GRID_TETRAHEDRAL:
default:
throw vislib::IllegalStateException(_T("The available ")
_T("grid type is not supported."),
__FILE__, __LINE__);
}
}
} else {
Log::DefaultLog.WriteError(_T("Failed to read and parse dat file ")
_T("%hs."),
fileName.PeekBuffer());
SAFE_DELETE(this->fileInfo);
}
/* Signal data having changed (this is always the case). */
++this->dataHash;
/* Restart loader if asynchronous loading was selected. */
if (isAsync) {
Log::DefaultLog.WriteInfo(_T("Resuming asynchronous loading thread ")
_T("after changing the data set."));
this->startAsyncLoad();
}
return true;
}
/*
* megamol::volume::VolumetricDataSource::onGetData
*/
bool megamol::volume::VolumetricDataSource::onGetData(core::Call& call) {
using core::param::BoolParam;
using core::param::IntParam;
using geocalls::VolumetricDataCall;
using megamol::core::utility::log::Log;
int expected = 0;
bool retval = false;
VolumetricDataCall& c = dynamic_cast<VolumetricDataCall&>(call);
if (c.DataHash() != this->dataHash) {
try {
/* Evaluate parameter changes. */
bool isAsync = this->paramLoadAsync.Param<BoolParam>()->Value();
size_t cntBuffers = this->paramBuffers.Param<IntParam>()->Value();
if (cntBuffers != this->buffers.Count()) {
bool isResume = this->suspendAsyncLoad(true);
this->assertBuffersUnsafe(cntBuffers);
if (isResume) {
this->resumeAsyncLoad();
}
}
if (isAsync && this->loaderStatus != LOADER_STATUS_RUNNING) {
this->startAsyncLoad();
}
/* Do the actual work. */
c.SetDataHash(this->dataHash);
/* Sanity check. */
if (this->fileInfo == nullptr) {
throw vislib::IllegalStateException(_T("A valid dat file must be ")
_T("loaded before the data can be read."),
__FILE__, __LINE__);
}
/*
* Search whether we have the requested frame buffered. The synchronous
* and the asynchronous case will handle this differently.
*/
auto bufferIdx = this->bufferForFrameIDUnsafe(c.FrameID());
if (isAsync) {
/* Loader is running asynchronously, try to get data from buffer. */
if (c.GetData() != nullptr) {
throw vislib::IllegalStateException(_T("A user-defined ")
_T("destination buffer cannot be used if asynchronous ")
_T("loading has been enabled."),
__FILE__, __LINE__);
}
// The loader cannot change the number of buffers. Therefore, we do
// not lock the buffers here.
// Note: Only the UI thread shall reallocate buffers, so we to not
// lock here and allow the loader thread to continue.
ASSERT(this->buffers.Count() > 0);
/* Get the buffer we use for loading the requested frame. */
auto buffer = (bufferIdx >= 0) ? this->buffers[bufferIdx] : nullptr;
/*
* Cancel all non-running requests and search buffers we can
* potentially reuse to load the requested frame and the ones after
* that (both, for the current frame as well as for the follow-up
* frames).
*/
vislib::Array<BufferSlot*> oldBuffers(this->buffers.Count());
vislib::Array<BufferSlot*> unusedBuffers(this->buffers.Count());
for (size_t i = 0; i < this->buffers.Count(); ++i) {
auto b = this->buffers[i % this->buffers.Count()];
if (b != buffer) {
if (b->status.load() == BUFFER_STATUS_UNUSED) {
unusedBuffers.Add(b);
}
if (b->status.load() == BUFFER_STATUS_READY) {
oldBuffers.Add(b);
}
expected = BUFFER_STATUS_PENDING;
if (b->status.compare_exchange_strong(expected, BUFFER_STATUS_UNUSED)) {
unusedBuffers.Add(b);
}
} /* end if (b != buffer) */
} /* end for (size_t i = 0; i < this->buffers.Count(); ++i) */
if (buffer == nullptr) {
/*
* If we do not have the frame, request it using a free or
* reusable buffer.
*/
if (!unusedBuffers.IsEmpty()) {
buffer = unusedBuffers[0];
unusedBuffers.RemoveFirst();
} else if (!oldBuffers.IsEmpty()) {
buffer = oldBuffers[0];
oldBuffers.RemoveFirst();
}
}
if (buffer != nullptr) {
/*
* Request loading only if the buffer is not yet ready or
* already being queued.
*/
if (buffer->FrameID != c.FrameID()) {
buffer->FrameID = c.FrameID();
buffer->status.store(BUFFER_STATUS_UNUSED);
}
expected = BUFFER_STATUS_UNUSED;
buffer->status.compare_exchange_strong(expected, BUFFER_STATUS_PENDING);
/* Ensure that loading the requested frame starts now. */
this->evtStartLoading.Set();
/* Request follow-up frames. */
for (size_t i = 1; (i < this->metadata.NumberOfFrames) && (i < this->buffers.Count() - 1); ++i) {
unsigned int frameID = (c.FrameID() + i) % (unsigned int) this->metadata.NumberOfFrames;
if (this->bufferForFrameIDUnsafe(frameID) < 0) {
BufferSlot* bs = nullptr;
if (!unusedBuffers.IsEmpty()) {
bs = unusedBuffers.First();
unusedBuffers.RemoveFirst();
} else if (!oldBuffers.IsEmpty()) {
bs = oldBuffers.First();
oldBuffers.RemoveFirst();
}
if (bs != nullptr) {
#if defined(DEBUG) || defined(_DEBUG)
Log::DefaultLog.WriteInfo(_T("Queueing frame %u ")
_T("to be loaded for future use."),
frameID);
#endif /* defined(DEBUG) || defined(_DEBUG) */
bs->FrameID = frameID;
bs->status.store(BUFFER_STATUS_PENDING);
ASSERT(this->bufferForFrameIDUnsafe(frameID) != -1);
} /* end if (bs != nullptr) */
} /* end if (this->bufferForFrameIDUnsafe(frameID) == -1) */
}
/* Ensure that the loader thread is awake. */
this->evtStartLoading.Set();
/* Wait for the requested data if not yet loaded. */
#if 0
expected = BUFFER_STATUS_READY;
while (!buffer->status.compare_exchange_strong(expected,
BUFFER_STATUS_USED)) {
expected = BUFFER_STATUS_READY;
//vislib::sys::Thread::Reschedule();
this->evtStartLoading.Set();
}
#else
int expecteds[] = {BUFFER_STATUS_READY, BUFFER_STATUS_USED};
this->spinExchange(
buffer->status, BUFFER_STATUS_USED, expecteds, STATIC_ARRAY_COUNT(expecteds), false);
#endif
ASSERT(buffer->status == BUFFER_STATUS_USED);
/* Move the stuff to the call and set the unlocker. */
c.SetData(buffer->Buffer.At(0), 1);
VolumetricDataSource::setUnlocker(c, buffer);
retval = true;
} else {
/* We do not have buffers left, which is a fatal error. */
Log::DefaultLog.WriteError(_T("There are insufficient ")
_T("buffers for loading the frame with ID %u."),
c.FrameID());
retval = false;
}
} else {
/* Loader is running synchronously, complete the request. */
size_t cnt = vislib::math::Max<size_t>(1, c.GetAvailableFrames());
size_t frameSize = this->calcFrameSize();
size_t loadStart = 0;
vislib::Array<void*> dst(cnt);
if (c.GetData() == nullptr) {
/*
* If the call does not request a direct copy to a target buffer
* that the caller provides, allocate local memory and return
* the data from there.
*
* In this case, we might already have preloaded the requested
* frame into an existing buffer. If so, reuse the existing
* buffer and preload the following frames if requested.
*
* Note that preloading to a data source-local buffer does not
* enable the caller to immediately get the data.
*/
dst.SetCount(vislib::math::Min(this->assertBuffersUnsafe(cnt, true), cnt));
if ((bufferIdx >= 0) && (this->buffers[bufferIdx]->status == BUFFER_STATUS_READY)) {
loadStart = 1;
dst[0] = this->buffers[bufferIdx]->Buffer.At(0);
retval = true;
} else {
loadStart = 0;
bufferIdx = 0;
}
for (size_t i = loadStart; i < dst.Count(); ++i) {
size_t idx = i % dst.Count();
this->buffers[idx]->FrameID = c.FrameID() + (unsigned int) i;
this->buffers[idx]->Buffer.AssertSize(frameSize);
this->buffers[idx]->status.store(BUFFER_STATUS_READY);
dst[i] = this->buffers[idx]->Buffer.At(0);
}
ASSERT(this->buffers[bufferIdx]->Buffer.At(0) == dst[0]);
this->buffers[bufferIdx]->status.store(BUFFER_STATUS_USED);
c.SetData(dst[0], 1);
VolumetricDataSource::setUnlocker(c, this->buffers[bufferIdx]);
} else {
/*
* The caller requests us to copy directly to the memory that is
* provided in the call. We assume this memory to be contiguous
* and large enough to hold all requested frames.
*/
dst.SetCount(cnt);
for (size_t i = 0; i < dst.Count(); ++i) {
dst[i] = static_cast<BYTE*>(c.GetData()) + i * frameSize;
}
loadStart = 0;
// No local buffer is required here. The data pointer is already
// set by the caller.
} /* end if (c.GetData() == nullptr) */
retval = true;
for (size_t i = loadStart; i < cnt; ++i) {
auto buffer = dst[i];
auto frameID = c.FrameID() + i;
auto format = this->getOutputDataFormat();
#if (defined(DEBUG) || defined(_DEBUG))
Log::DefaultLog.WriteInfo("Loading frame %u in format "
"%hs to 0x%p",
frameID, ::datRaw_getDataFormatName(format), reinterpret_cast<void const*>(dst.PeekElements()));
#endif /* (defined(DEBUG) || defined(_DEBUG)) */
retval = (::datRaw_loadStep(this->fileInfo, static_cast<int>(frameID), &buffer, format) != 0);
::datRaw_close(this->fileInfo);
if (!retval) {
Log::DefaultLog.WriteError("Loading frame %u failed.", frameID);
break;
}
} /* end for (size_t i = 0; i < dst.Count(); ++i) */
} /* end if (this->paramLoadAsync.Param<BoolParam>()->Value()) */
} catch (vislib::Exception& e) {
Log::DefaultLog.WriteError(e.GetMsg());
retval = false;
} catch (...) {
Log::DefaultLog.WriteError("Unexpected exception in callback "
"onGetData (please check the call).");
retval = false;
}
if (retval) {
const VolumetricDataCall& vdc = dynamic_cast<VolumetricDataCall&>(call);
switch (this->getOutputDataFormat()) {
case DR_FORMAT_UCHAR:
this->calcMinMax<uint8_t>(vdc.GetData(), this->mins, this->maxes, *fileInfo, metadata);
break;
case DR_FORMAT_FLOAT:
this->calcMinMax<float>(vdc.GetData(), this->mins, this->maxes, *fileInfo, metadata);
break;
case DR_FORMAT_DOUBLE:
this->calcMinMax<double>(vdc.GetData(), this->mins, this->maxes, *fileInfo, metadata);
break;
case DR_FORMAT_USHORT:
this->calcMinMax<uint16_t>(vdc.GetData(), this->mins, this->maxes, *fileInfo, metadata);
break;
case DR_FORMAT_SHORT:
this->calcMinMax<int16_t>(vdc.GetData(), this->mins, this->maxes, *fileInfo, metadata);
break;
case DR_FORMAT_RAW:
megamol::core::utility::log::Log::DefaultLog.WriteWarn(
"Cannot determine min/max of BITS volume. Setting to [0,1].");
this->mins.resize(this->metadata.Components, 0.0);
this->maxes.resize(this->metadata.Components, 1.0);
break;
default:
megamol::core::utility::log::Log::DefaultLog.WriteWarn(
"Cannot determine min/max of unknown volume. Setting to [0,1].");
this->mins.resize(this->metadata.Components, 0.0);
this->maxes.resize(this->metadata.Components, 1.0);
break;
}
this->metadata.MinValues = this->mins.data();
this->metadata.MaxValues = this->maxes.data();
}
} else {
retval = true;
}
return retval;
}
/*
* megamol::volume::VolumetricDataSource::onGetExtents
*/
bool megamol::volume::VolumetricDataSource::onGetExtents(core::Call& call) {
using geocalls::VolumetricDataCall;
using megamol::core::utility::log::Log;
try {
VolumetricDataCall& c = dynamic_cast<VolumetricDataCall&>(call);
/* Sanity check. */
if (this->fileInfo == nullptr) {
throw vislib::IllegalStateException(_T("A valid dat file must be ")
_T("loaded before the extents can be retrieved."),
__FILE__, __LINE__);
}
/*
* If the file info is available, metadata are also available. We can
* use them to avoid doing the same thing twice.
*/
/* Complete request. */
c.SetExtent((unsigned int) this->metadata.NumberOfFrames, this->metadata.Origin[0], this->metadata.Origin[1],
this->metadata.Origin[2], this->metadata.Extents[0] + this->metadata.Origin[0],
this->metadata.Extents[1] + this->metadata.Origin[1], this->metadata.Extents[2] + this->metadata.Origin[2]);
// Log::DefaultLog.WriteInfo( _T("Volume bounding box is ")
// _T("(%f, %f, %f) - (%f, %f, %f)."), 0.0f, 0.0f, 0.0f,
// this->metadata.Extents[0], this->metadata.Extents[1],
// this->metadata.Extents[2]);
return true;
} catch (vislib::Exception e) {
Log::DefaultLog.WriteError(e.GetMsg());
return false;
} catch (...) {
Log::DefaultLog.WriteError(_T("Unexpected exception in callback ")
_T("onGetExtents (please check the call)."));
return false;
}
}
/*
* megamol::volume::VolumetricDataSource::onGetMetadata
*/
bool megamol::volume::VolumetricDataSource::onGetMetadata(core::Call& call) {
using geocalls::VolumetricDataCall;
using megamol::core::utility::log::Log;
try {
VolumetricDataCall& c = dynamic_cast<VolumetricDataCall&>(call);
/* Sanity check. */
if (this->fileInfo == nullptr) {
throw vislib::IllegalStateException(_T("A valid dat file must be ")
_T("loaded before the meta data can be retrieved."),
__FILE__, __LINE__);
}
/*
* If the file info was set, we can assume that the metadata are
* up-to-date, because we update them immediately after parsing the
* dat file in the handler for file name changes.
*/
c.SetMetadata(&this->metadata);
return true;
} catch (vislib::Exception e) {
Log::DefaultLog.WriteError(e.GetMsg());
return false;
} catch (...) {
Log::DefaultLog.WriteError(_T("Unexpected exception in callback ")
_T("onGetMetadata (please check the call)."));
return false;
}
}
/*
* megamol::volume::VolumetricDataSource::onTryGetData
*/
bool megamol::volume::VolumetricDataSource::onTryGetData(core::Call& call) {
using geocalls::VolumetricDataCall;
using megamol::core::utility::log::Log;
int expected = 0;
bool retval = true;
try {
VolumetricDataCall& c = dynamic_cast<VolumetricDataCall&>(call);
c.SetDataHash(this->dataHash);
/* Sanity check. */
if (this->fileInfo == nullptr) {
throw vislib::IllegalStateException(_T("A valid dat file must be ")
_T("loaded before the data can be read."),
__FILE__, __LINE__);
}
if (c.GetAvailableFrames() != 1) {
Log::DefaultLog.WriteWarn(_T("When invoking TryGetData, exactly ")
_T("one frame can be requested from the data source."));
}
/* Try to get the data. */
auto bufferIdx = this->bufferForFrameIDUnsafe(c.FrameID());
void* data = nullptr;
size_t cnt = 0;
if (bufferIdx >= 0) {
auto buffer = this->buffers[bufferIdx];
int expected = BUFFER_STATUS_READY;
if (buffer->status.compare_exchange_strong(expected, BUFFER_STATUS_USED)) {
data = buffer->Buffer.At(0);
cnt = 1;
}
}
/* Update the call. */
if (data != nullptr) {
if (c.GetData() == nullptr) {
/*
* No user-provided buffer, pass the pointer and give
* ownership to the call by registering the unlocker.
*/
c.SetData(data, cnt);
VolumetricDataSource::setUnlocker(c, this->buffers[bufferIdx]);
} else if (data != nullptr) {
/*
* Copy data to user-defined buffer and release local
* ownership (unlock immediately).
*/
ASSERT(bufferIdx >= 0);
::memcpy(c.GetData(), data, this->calcFrameSize());
c.SetData(c.GetData(), 1);
this->buffers[bufferIdx]->status.store(BUFFER_STATUS_READY);
}
} else {
/* Have no data, which is OK. No need to unlock anything here. */
c.SetData(nullptr, 0);
}
} catch (vislib::Exception e) {
Log::DefaultLog.WriteError(e.GetMsg());
retval = false;
} catch (...) {
Log::DefaultLog.WriteError(_T("Unexpected exception in callback ")
_T("onTryGetData (please check the call)."));
retval = false;
}
return retval;
}
/*
* megamol::volume::VolumetricDataSource::BUFFER_STATUS_DELETING
*/
const int megamol::volume::VolumetricDataSource::BUFFER_STATUS_DELETING = 5;
/*
* megamol::volume::VolumetricDataSource::BUFFER_STATUS_LOADING
*/
const int megamol::volume::VolumetricDataSource::BUFFER_STATUS_LOADING = 2;
/*
* megamol::volume::VolumetricDataSource::BUFFER_STATUS_PENDING
*/
const int megamol::volume::VolumetricDataSource::BUFFER_STATUS_PENDING = 1;
/*
* megamol::volume::VolumetricDataSource::BUFFER_STATUS_READY
*/
const int megamol::volume::VolumetricDataSource::BUFFER_STATUS_READY = 3;
/*
* megamol::volume::VolumetricDataSource::BUFFER_STATUS_UNUSED
*/
const int megamol::volume::VolumetricDataSource::BUFFER_STATUS_UNUSED = 0;
/*
* megamol::volume::VolumetricDataSource::BUFFER_STATUS_USED
*/
const int megamol::volume::VolumetricDataSource::BUFFER_STATUS_USED = 4;
/*
* megamol::volume::VolumetricDataSource::LOADER_STATUS_PAUSED
*/
const int megamol::volume::VolumetricDataSource::LOADER_STATUS_PAUSED = 2;
/*
* megamol::volume::VolumetricDataSource::LOADER_STATUS_PAUSING
*/
const int megamol::volume::VolumetricDataSource::LOADER_STATUS_PAUSING = 1;
/*
* megamol::volume::VolumetricDataSource::LOADER_STATUS_RUNNING
*/
const int megamol::volume::VolumetricDataSource::LOADER_STATUS_RUNNING = 0;
/*
* megamol::volume::VolumetricDataSource::LOADER_STATUS_STOPPED
*/
const int megamol::volume::VolumetricDataSource::LOADER_STATUS_STOPPED = 4;
/*
* megamol::volume::VolumetricDataSource::LOADER_STATUS_STOPPING
*/
const int megamol::volume::VolumetricDataSource::LOADER_STATUS_STOPPING = 3;
/*
* megamol::volume::VolumetricDataSource::onLoadAsyncChanged
*/
bool megamol::volume::VolumetricDataSource::onLoadAsyncChanged(core::param::ParamSlot& slot) {
// VLAUTOSTACKTRACE;
// using megamol::core::utility::log::Log;
// bool isEnabled = this->paramLoadAsync.Param<core::param::BoolParam>(
// )->Value();
// try {
// Log::DefaultLog.WriteInfo(_T("Asynchronous loading changed to %d ")
// _T("on user request."), isEnabled);
// this->continueLoading.store(isEnabled);
// if (isEnabled && !this->loaderThread.IsRunning()) {
// // Start loader if not running.
// this->assertBuffers();
// this->loaderThread.Start(this);
// }
// this->evtStartLoading.Set();
//} catch (vislib::Exception e) {
// Log::DefaultLog.WriteError( e.GetMsg());
//} catch (...) {
// Log::DefaultLog.WriteError( _T("Unexpected exception in callback ")
// _T("onLoadAsyncChanged."));
//}
return true;
}
/*
* megamol::volume::VolumetricDataSource::onMemorySaturationChanged
*/
bool megamol::volume::VolumetricDataSource::onMemorySaturationChanged(core::param::ParamSlot& slot) {
// TODO: Free memory if allowed staturation was shrinked.
return false;
}
/*
* megamol::volume::VolumetricDataSource::onStartAsync
*/
bool megamol::volume::VolumetricDataSource::onStartAsync(core::Call& call) {
this->paramLoadAsync.Param<core::param::BoolParam>()->SetValue(true);
return true;
}
/*
* megamol::volume::VolumetricDataSource::onStopAsync
*/
bool megamol::volume::VolumetricDataSource::onStopAsync(core::Call& call) {
this->paramLoadAsync.Param<core::param::BoolParam>()->SetValue(false);
return true;
}