//GPU implementation of the MLS alg., the returns are in the graphics card
void MLSGpuVolumeMapping::updateMapping(const Vector3d* input, Vector3d* output)
{
//update VBO
_updateBuffer(m_pSrcObj, m_pDstObj, vboDefRefVertexArray, input, output);
//Perform GPU based deformation
const int timerid=4;
startFastTimer(timerid);
const int nv = m_pDstObj->m_nVertexCount;
runGpuMlsDeformation(
nv, //length of the problem (here is the vertex length)
vboRefVertexArray, //static vertex array of the reference model, float3
vboDefRefVertexArray, //deformed vertex array of the reference model, float3
//&m_pDeviceDefRefVertex[0].x,
vboNeighborArray, //neighbourhood array, or connectivity, int4
vboVertexArray, //static vertex array of the visual model, float3
vboDefVertexArray, //deformed vertex array of the visual model, float3
vboQuatArray); //rotation quaternion array, float4
stopFastTimer(timerid);
reportTimeDifference(timerid, "GPU MLS time is");
//Copy buffer
glBindBuffer(GL_ARRAY_BUFFER, vboDefVertexArray);
Vector3f *pDefVert = (Vector3f *)glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
if (pDefVert==NULL) return;
for (int i=0; i<m_pDstObj->m_nVertexCount; i++, pDefVert++){
output[i] = Vector3d(pDefVert->x, pDefVert->y, pDefVert->z);
//if (i<10) printf("%d: %lg %lg %lg\n", i, output[i].x, output[i].y, output[i].z);
}
//printf("\n\n");
glUnmapBuffer(GL_ARRAY_BUFFER);
glBindBuffer(GL_ARRAY_BUFFER, 0);
return;
}
/**
* @details
* Method to run the channeliser.
*
* The channeliser performs channelisation of a number of sub-bands containing
* a complex time series.
*
* Parallelisation, by means of openMP threads, is carried out by splitting
* the sub-bands as evenly as possible between threads.
*
* @param[in] timeSeries Buffer of time samples to be channelised.
* @param[out] spectrum Set of spectra produced.
*/
void PPFChanneliser::run(const TimeSeriesDataSetC32* timeSeries,
SpectrumDataSetC32* spectra)
{
// Perform a number of sanity checks on the input data.
_checkData(timeSeries);
// Make local copies of the data dimensions.
unsigned nSubbands = timeSeries->nSubbands();
unsigned nPolarisations = timeSeries->nPolarisations();
unsigned nTimeBlocks = timeSeries->nTimeBlocks();
unsigned nTimesPerBlock = timeSeries->nTimesPerBlock();
// Resize the output spectra blob (if required).
spectra->resize(nTimeBlocks, nSubbands, nPolarisations, _nChannels);
// Set the timing parameters - Only need the timestamp of the first packet
// for this version of the Channeliser.
spectra->setLofarTimestamp(timeSeries->getLofarTimestamp());
spectra->setBlockRate(timeSeries->getBlockRate() * _nChannels);
const float* coeffs = &_coeffs[0];
unsigned threadId = 0, nThreads = 0, start = 0, end = 0;
Complex *workBuffer = 0, *filteredSamples = 0;
Complex const * timeData = 0;
const Complex* timeStart = timeSeries->constData();
Complex* spectraStart = spectra->data();
if (_nChannels == 1)
{
// Loop over data to be channelised.
for (unsigned subband = 0; subband < nSubbands; ++subband)
{
for (unsigned pol = 0; pol < nPolarisations; ++pol)
{
for (unsigned block = 0; block < nTimeBlocks; ++block)
{
// Get pointer to time series array.
unsigned index = timeSeries->index(subband, nTimesPerBlock,
pol, nPolarisations, block, nTimeBlocks);
timeData = &timeStart[index];
for (unsigned t = 0; t < nTimesPerBlock; ++t) {
// FFT the filtered sub-band data to form a new spectrum.
unsigned indexSpectra = spectra->index(subband, nSubbands,
pol, nPolarisations, (nTimesPerBlock*block)+t, _nChannels);
// spectraStart = &spectra->data()[indexSpectra];
spectraStart[indexSpectra] = timeData[t];
}
}
}
}
} else {
// Set up work buffers (if required).
unsigned nFilterTaps = _ppfCoeffs.nTaps();
if (!_buffersInitialised)
_setupWorkBuffers(nSubbands, nPolarisations, _nChannels, nFilterTaps);
// Channeliser processing.
#pragma omp parallel \
shared(nTimeBlocks, nPolarisations, nSubbands, nFilterTaps, coeffs,\
timeStart, spectraStart) \
private(threadId, nThreads, start, end, workBuffer, filteredSamples, \
timeData)
{
threadId = omp_get_thread_num();
nThreads = omp_get_num_threads();
// Assign processing threads in a round robin fashion to subbands.
_assign_threads(start, end, nSubbands, nThreads, threadId);
// Pointer to work buffer for the thread.
filteredSamples = &_filteredData[threadId][0];
// Loop over data to be channelised.
for (unsigned subband = start; subband < end; ++subband)
{
for (unsigned pol = 0; pol < nPolarisations; ++pol)
{
for (unsigned block = 0; block < nTimeBlocks; ++block)
{
// Get pointer to time series array.
unsigned index = timeSeries->index(subband, nTimesPerBlock,
pol, nPolarisations, block, nTimeBlocks);
timeData = &timeStart[index];
// Get a pointer to the work buffer.
workBuffer = &(_workBuffer[subband * nPolarisations + pol])[0];
// Update buffered (lagged) data for the sub-band.
_updateBuffer(timeData, _nChannels, nFilterTaps, workBuffer);
// Apply the PPF.
_filter(workBuffer, nFilterTaps, _nChannels, coeffs, filteredSamples);
// FFT the filtered sub-band data to form a new spectrum.
unsigned indexSpectra = spectra->index(subband, nSubbands,
pol, nPolarisations, block, _nChannels);
_fft(filteredSamples, &spectraStart[indexSpectra]);
}
}
}
} // end of parallel region.
}
}
