REFERENCE_TIME CTimeStretchFilter::DrainBuffers(IMediaSample* pSample, REFERENCE_TIME rtNewStart)
{
Log("TS - DrainBuffers - rtNewStart: %6.3f", rtNewStart / 10000000.0);
uint unprocessedSamplesBefore = numUnprocessedSamples();
uint zeros = flushEx() - 32; // Magic 32 to keep the SoundTouch's output in sync
uint unprocessedSamplesAfter = numUnprocessedSamples();
UINT32 outFramesAfter = numSamples();
UINT32 totalSamples = zeros + unprocessedSamplesBefore;
UINT32 totalProcessedSamples = totalSamples - unprocessedSamplesAfter;
Log("TS - DrainBuffers - unprocessedSamplesBefore: %u zeros: %u unprocessedSamplesAfter: %u outFramesAfter: %u duration %6.3f",
unprocessedSamplesBefore, zeros, unprocessedSamplesAfter, outFramesAfter, (double)unprocessedSamplesBefore * (double) UNITS / (double) m_pOutputFormat->Format.nSamplesPerSec);
REFERENCE_TIME rtAHwTime = 0;
REFERENCE_TIME rtRCTime = 0;
REFERENCE_TIME estimatedExtraSampleDuration = (((int)zeros - (int)unprocessedSamplesAfter) * UNITS) / m_pOutputFormat->Format.nSamplesPerSec;
double bias = m_pClock->GetBias();
double adjustment = m_pClock->Adjustment();
m_pClock->GetHWTime(&rtRCTime, &rtAHwTime);
double AVMult = m_pClock->SuggestedAudioMultiplier(rtAHwTime, rtRCTime, bias, adjustment);
setTempoInternal(AVMult, 1.0);
CreateOutput(totalProcessedSamples, outFramesAfter, bias, adjustment, AVMult, true);
// Empty SoundTouch's buffers
clear();
pSample->SetDiscontinuity(false);
return estimatedExtraSampleDuration;
}
HRESULT CTimeStretchFilter::CheckSample(IMediaSample* pSample)
{
if (!pSample)
return S_OK;
AM_MEDIA_TYPE *pmt = NULL;
bool bFormatChanged = false;
HRESULT hr = S_OK;
if (SUCCEEDED(pSample->GetMediaType(&pmt)) && pmt)
bFormatChanged = !FormatsEqual((WAVEFORMATEXTENSIBLE*)pmt->pbFormat, m_pInputFormat);
if (bFormatChanged)
{
uint unprocessedSamplesBefore = numUnprocessedSamples();
uint zeros = flushEx();
uint unprocessedSamplesAfter = numUnprocessedSamples();
UINT32 outFramesAfter = numSamples();
UINT32 totalSamples = zeros + unprocessedSamplesBefore;
UINT32 totalProcessedSamples = totalSamples - unprocessedSamplesAfter;
//double bias = (double)totalProcessedSamples / (double)outFramesAfter;
REFERENCE_TIME estimatedSampleDuration = totalProcessedSamples * UNITS / m_pOutputFormat->Format.nSamplesPerSec;
double bias = m_pClock->GetBias();
double adjustment = m_pClock->Adjustment();
double AVMult = m_pClock->SuggestedAudioMultiplier(estimatedSampleDuration, bias, adjustment);
setTempoInternal(AVMult, 1.0);
CreateOutput(totalProcessedSamples, outFramesAfter, bias, adjustment, AVMult, true);
// Empty SoundTouch's buffers
clear();
// Apply format change
ChannelOrder chOrder;
hr = NegotiateFormat((WAVEFORMATEXTENSIBLE*)pmt->pbFormat, 1, &chOrder);
pSample->SetDiscontinuity(false);
if (FAILED(hr))
{
DeleteMediaType(pmt);
Log("CTimeStretchFilter::CheckFormat failed to change format: 0x%08x", hr);
return hr;
}
else
{
m_chOrder = chOrder;
return S_FALSE; // format changed
}
}
return S_OK;
}
void CTimeStretchFilter::CreateOutput(UINT32 nInFrames, UINT32 nOutFrames, double dBias, double dAdjustment, double dAVMult, bool bFlushPartialSample)
{
HRESULT hr = S_OK;
UINT32 maxBufferFrames = DEFAULT_OUT_BUFFER_SIZE / m_pOutputFormat->Format.nBlockAlign;
UINT32 nOutFramesTotal = 0;
while (nOutFrames > 0)
{
// try to get an output buffer if none available
if (!m_pNextOutSample && FAILED(hr = RequestNextOutBuffer(m_rtInSampleTime)))
{
Log("CTimeStretchFilter::timestretch thread - Failed to get next output sample!");
break;
}
BYTE* pOutData = NULL;
m_pNextOutSample->GetPointer(&pOutData);
if (pOutData)
{
UINT32 nOffset = m_pNextOutSample->GetActualDataLength();
UINT32 nOffsetInFrames = nOffset / m_pOutputFormat->Format.nBlockAlign;
if (nOutFrames > maxBufferFrames - nOffsetInFrames)
nOutFrames = maxBufferFrames - nOffsetInFrames;
m_pNextOutSample->SetActualDataLength(nOffset + nOutFrames * m_pOutputFormat->Format.nBlockAlign);
pOutData += nOffset;
receiveSamplesInternal((short*)pOutData, nOutFrames);
nOutFramesTotal += nOutFrames;
if (m_pMediaType)
m_pNextOutSample->SetMediaType(m_pMediaType);
OutputSample(bFlushPartialSample);
nOutFrames = numSamples();
}
}
if (nOutFramesTotal > 0)
{
double rtSampleDuration = (double)nInFrames * (double)UNITS / (double)m_pOutputFormat->Format.nSamplesPerSec;
double rtProcessedSampleDuration = (double)(nOutFramesTotal) * (double)UNITS / (double)m_pOutputFormat->Format.nSamplesPerSec;
m_pClock->AudioResampled(rtProcessedSampleDuration, rtSampleDuration, dBias, dAdjustment, dAVMult);
//Log(m_pClock->DebugData());
}
}
uint CTimeStretchFilter::receiveSamplesInternal(short *outBuffer, uint maxSamples)
{
if (!m_Streams)
return 0;
uint outSamples = numSamples();
if (outSamples > maxSamples)
outSamples = maxSamples;
for (int i = 0; i < m_Streams->size(); i++)
{
m_Streams->at(i)->getBuffer((BYTE *)outBuffer, outSamples);
}
return outSamples;
}
std::vector<std::size_t> ConflictGraph::selectEssentialConstraints(){
std::vector<std::size_t> res;
for (std::size_t sample = 0; sample < numSamples(); sample++){
std::size_t numConflicts = 0;
std::size_t essentialConstraint = 0;
for(std::size_t constraint = 0; constraint < mData.size(); constraint++){
if(mData[constraint].test(sample)) {
numConflicts++;
essentialConstraint = constraint;
}
}
if(numConflicts == 1){
selectConstraint(essentialConstraint);
res.push_back(essentialConstraint);
}
}
return res;
}
void CTimeStretchFilter::CreateOutput(UINT32 nInFrames, UINT32 nOutFrames, double dBias, double dAdjustment, double dAVMult, bool bFlushPartialSample)
{
HRESULT hr = S_OK;
UINT32 maxBufferFrames = m_nOutBufferSize / m_pOutputFormat->Format.nBlockAlign;
UINT32 nOutFramesTotal = 0;
while (nOutFrames > 0)
{
// try to get an output buffer if none available
if (!m_pNextOutSample && FAILED(hr = RequestNextOutBuffer(m_rtInSampleTime)))
{
Log("CTimeStretchFilter::timestretch thread - Failed to get next output sample!");
break;
}
BYTE* pOutData = NULL;
m_pNextOutSample->GetPointer(&pOutData);
if (pOutData)
{
UINT32 nOffset = m_pNextOutSample->GetActualDataLength();
UINT32 nOffsetInFrames = nOffset / m_pOutputFormat->Format.nBlockAlign;
if (nOutFrames > maxBufferFrames - nOffsetInFrames)
nOutFrames = maxBufferFrames - nOffsetInFrames;
m_pNextOutSample->SetActualDataLength(nOffset + nOutFrames * m_pOutputFormat->Format.nBlockAlign);
pOutData += nOffset;
receiveSamplesInternal((short*)pOutData, nOutFrames);
nOutFramesTotal += nOutFrames;
if (m_pMediaType)
m_pNextOutSample->SetMediaType(m_pMediaType);
OutputSample(bFlushPartialSample);
nOutFrames = numSamples();
}
}
}
/**
* Returns a new ConflictGraph whose adjacency matrix consists
* only of the unique columns of the adjacency matrix of this graph.
*/
ConflictGraph ConflictGraph::removeDuplicateColumns(){
std::set<std::vector<uint8_t>> uniqueColumns;
for(std::size_t s = 0; s < numSamples(); s++){
std::vector<uint8_t> column (mData.size(), 0);
for(std::size_t constraint = 0; constraint < mData.size(); constraint++){
column[constraint] = mData[constraint].test(s);
}
uniqueColumns.insert(column);
}
ConflictGraph res(mData.size());
for(auto& b : res.mData){
b.resize(uniqueColumns.size());
}
std::size_t sid = 0;
for(auto column : uniqueColumns){
for(std::size_t row = 0; row < mData.size(); row++){
res.mData[row].set(sid, column[row]);
}
sid++;
}
return res;
}
// Processing
DWORD CTimeStretchFilter::ThreadProc()
{
Log("CTimeStretchFilter::timestretch thread - starting up - thread ID: %d", m_ThreadId);
SetThreadName(0, "TimeStretchFilter");
AudioSinkCommand command;
CComPtr<IMediaSample> sample;
while (true)
{
m_csResources.Unlock();
HRESULT hr = GetNextSampleOrCommand(&command, &sample.p, INFINITE, &m_hSampleEvents, &m_dwSampleWaitObjects);
m_csResources.Lock();
if (hr == MPAR_S_THREAD_STOPPING)
{
Log("CTimeStretchFilter::timestretch thread - closing down - thread ID: %d", m_ThreadId);
SetEvent(m_hCurrentSampleReleased);
CloseThread();
m_csResources.Unlock();
return 0;
}
else
{
if (command == ASC_Flush)
{
Log("CTimeStretchFilter::timestretch thread - flushing");
m_rtInSampleTime = m_rtNextIncomingSampleTime = 0;
if (m_pNextOutSample)
m_pNextOutSample.Release();
flush();
sample.Release();
SetEvent(m_hCurrentSampleReleased);
}
else if (command == ASC_Pause || command == ASC_Resume)
continue;
else if (sample)
{
BYTE *pMediaBuffer = NULL;
long size = sample->GetActualDataLength();
if (sample->IsDiscontinuity() == S_OK)
{
sample->SetDiscontinuity(false);
m_bDiscontinuity = true;
}
if (CheckSample(sample) == S_FALSE)
{
DeleteMediaType(m_pMediaType);
sample->GetMediaType(&m_pMediaType);
}
CheckStreamContinuity(sample);
m_nSampleNum++;
hr = sample->GetPointer(&pMediaBuffer);
if ((hr == S_OK) && m_pMemAllocator)
{
uint unprocessedSamplesBefore = numUnprocessedSamples();
uint unprocessedSamplesAfter = 0;
UINT32 nFrames = size / m_pOutputFormat->Format.nBlockAlign;
REFERENCE_TIME estimatedSampleDuration = nFrames * UNITS / m_pOutputFormat->Format.nSamplesPerSec;
double bias = m_pClock->GetBias();
double adjustment = m_pClock->Adjustment();
double AVMult = m_pClock->SuggestedAudioMultiplier(estimatedSampleDuration, bias, adjustment);
setTempoInternal(AVMult, 1.0); // this should be the same as previous line, but in future we want to get rid of the 2nd parameter
// Process the sample
putSamplesInternal((const short*)pMediaBuffer, size / m_pOutputFormat->Format.nBlockAlign);
unprocessedSamplesAfter = numUnprocessedSamples();
UINT32 nInFrames = (size / m_pOutputFormat->Format.nBlockAlign) - unprocessedSamplesAfter + unprocessedSamplesBefore;
UINT32 nOutFrames = numSamples();
CreateOutput(nInFrames, nOutFrames, bias, adjustment, AVMult, false);
}
}
}
}
}
// Processing
DWORD CTimeStretchFilter::ThreadProc()
{
Log("CTimeStretchFilter::timestretch thread - starting up - thread ID: %d", m_ThreadId);
SetThreadName(0, "TimeStretchFilter");
AudioSinkCommand command;
CComPtr<IMediaSample> sample;
while (true)
{
m_csResources.Unlock();
HRESULT hr = GetNextSampleOrCommand(&command, &sample.p, INFINITE, &m_hSampleEvents, &m_dwSampleWaitObjects);
m_csResources.Lock();
if (hr == MPAR_S_THREAD_STOPPING)
{
Log("CTimeStretchFilter::timestretch thread - closing down - thread ID: %d", m_ThreadId);
SetEvent(m_hCurrentSampleReleased);
CloseThread();
m_csResources.Unlock();
return 0;
}
else
{
if (command == ASC_Flush)
{
Log("CTimeStretchFilter::timestretch thread - flushing");
m_rtInSampleTime = m_rtNextIncomingSampleTime = 0;
m_rtLastOuputStart = m_rtLastOuputEnd = -1;
if (m_pNextOutSample)
m_pNextOutSample.Release();
flush();
m_pClock->Flush();
sample.Release();
SetEvent(m_hCurrentSampleReleased);
}
else if (command == ASC_Pause || command == ASC_Resume)
continue;
else if (sample)
{
BYTE *pMediaBuffer = NULL;
long size = sample->GetActualDataLength();
if (sample->IsDiscontinuity() == S_OK)
{
sample->SetDiscontinuity(false);
m_bDiscontinuity = true;
}
REFERENCE_TIME rtDrained = 0;
if (CheckSample(sample, &rtDrained) == S_FALSE)
{
DeleteMediaType(m_pMediaType);
sample->GetMediaType(&m_pMediaType);
}
CheckStreamContinuity(sample, rtDrained);
m_nSampleNum++;
hr = sample->GetPointer(&pMediaBuffer);
if ((hr == S_OK) && m_pMemAllocator)
{
REFERENCE_TIME rtStart = 0;
REFERENCE_TIME rtAdjustedStart = 0;
REFERENCE_TIME rtEnd = 0;
REFERENCE_TIME rtAdjustedEnd = 0;
REFERENCE_TIME rtAHwTime = 0;
REFERENCE_TIME rtRCTime = 0;
m_pClock->GetHWTime(&rtRCTime, &rtAHwTime);
sample->GetTime(&rtStart, &rtEnd);
REFERENCE_TIME sampleDuration = rtEnd - rtStart;
uint unprocessedSamplesBefore = numUnprocessedSamples();
uint unprocessedSamplesAfter = 0;
UINT32 nFrames = size / m_pOutputFormat->Format.nBlockAlign;
double bias = m_pClock->GetBias();
double adjustment = m_pClock->Adjustment();
double AVMult = m_pClock->SuggestedAudioMultiplier(rtAHwTime, rtRCTime, bias, adjustment);
setTempoInternal(AVMult, 1.0);
if (m_rtLastOuputEnd == -1)
m_rtLastOuputEnd = rtStart / AVMult - 1;
m_rtLastOuputStart = m_rtLastOuputEnd + 1;
// Process the sample
putSamplesInternal((const short*)pMediaBuffer, size / m_pOutputFormat->Format.nBlockAlign);
unprocessedSamplesAfter = numUnprocessedSamples();
UINT32 nInFrames = (size / m_pOutputFormat->Format.nBlockAlign) - unprocessedSamplesAfter + unprocessedSamplesBefore;
UINT32 nOutFrames = numSamples();
// TODO: Soundtouch can provide less samples than asked (but never more) so a cummulative error is possible. This will not happen over the course of a long TV stint, but could be solved for correctness
// m_rtLastOuputEnd += (nOutFrames + unprocessedSamplesAfter - unprocessedSamplesBefore) * UNITS / m_pOutputFormat->Format.nSamplesPerSec;
//rtStart = m_rtInSampleTime;
rtEnd = rtStart + sampleDuration;
rtAdjustedStart = m_rtLastOuputEnd +1;
rtAdjustedEnd = rtAdjustedStart + sampleDuration / AVMult;
m_rtLastOuputEnd += sampleDuration / AVMult;
CreateOutput(nInFrames, nOutFrames, bias, adjustment, AVMult, false);
m_pClock->AddSample(rtStart, rtAdjustedStart, rtEnd, rtAdjustedEnd);
}
}
}
}
}
///////////////////////////////////////////////////////////
//
// Returns a data handler for the waveform
//
///////////////////////////////////////////////////////////
ptr<handlers::dataHandler> waveform::getIntegerData(std::uint32_t channel, std::int32_t paddingValue)
{
PUNTOEXE_FUNCTION_START(L"waveform::getIntegerData");
static std::int32_t uLawDecompressTable[256] =
{
-32124,-31100,-30076,-29052,-28028,-27004,-25980,-24956,
-23932,-22908,-21884,-20860,-19836,-18812,-17788,-16764,
-15996,-15484,-14972,-14460,-13948,-13436,-12924,-12412,
-11900,-11388,-10876,-10364, -9852, -9340, -8828, -8316,
-7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
-5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
-3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
-2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
-1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
-1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
-876, -844, -812, -780, -748, -716, -684, -652,
-620, -588, -556, -524, -492, -460, -428, -396,
-372, -356, -340, -324, -308, -292, -276, -260,
-244, -228, -212, -196, -180, -164, -148, -132,
-120, -112, -104, -96, -88, -80, -72, -64,
-56, -48, -40, -32, -24, -16, -8, 0,
32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
876, 844, 812, 780, 748, 716, 684, 652,
620, 588, 556, 524, 492, 460, 428, 396,
372, 356, 340, 324, 308, 292, 276, 260,
244, 228, 212, 196, 180, 164, 148, 132,
120, 112, 104, 96, 88, 80, 72, 64,
56, 48, 40, 32, 24, 16, 8, 0
};
static std::int32_t aLawDecompressTable[256] =
{
-5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
-7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
-2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
-3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
-22016,-20992,-24064,-23040,-17920,-16896,-19968,-18944,
-30208,-29184,-32256,-31232,-26112,-25088,-28160,-27136,
-11008,-10496,-12032,-11520,-8960, -8448, -9984, -9472,
-15104,-14592,-16128,-15616,-13056,-12544,-14080,-13568,
-344, -328, -376, -360, -280, -264, -312, -296,
-472, -456, -504, -488, -408, -392, -440, -424,
-88, -72, -120, -104, -24, -8, -56, -40,
-216, -200, -248, -232, -152, -136, -184, -168,
-1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
-1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
-688, -656, -752, -720, -560, -528, -624, -592,
-944, -912, -1008, -976, -816, -784, -880, -848,
5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
344, 328, 376, 360, 280, 264, 312, 296,
472, 456, 504, 488, 408, 392, 440, 424,
88, 72, 120, 104, 24, 8, 56, 40,
216, 200, 248, 232, 152, 136, 184, 168,
1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
688, 656, 752, 720, 560, 528, 624, 592,
944, 912, 1008, 976, 816, 784, 880, 848
};
// Lock the dataset during the interpretation of the
// dataset
///////////////////////////////////////////////////////////
lockObject lockDataSet(m_pDataSet);
// Get the original data
///////////////////////////////////////////////////////////
ptr<handlers::dataHandler> waveformData(m_pDataSet->getDataHandler(0x5400, 0x0, 0x1010, 0, false));
std::string sourceDataType(waveformData->getDataType());
// Get the interpretation, number of channels, number of
// samples
///////////////////////////////////////////////////////////
std::string waveformInterpretation(getInterpretation());
std::uint32_t numChannels(getChannels());
std::uint32_t numSamples(getSamples());
std::uint32_t originalPaddingValue(0);
bool bPaddingValueExists(false);
ptr<handlers::dataHandler> paddingTagHandler(m_pDataSet->getDataHandler(0x5400, 0, 0x100A, 0, false));
if(paddingTagHandler != 0)
{
originalPaddingValue = paddingTagHandler->getUnsignedLong(0);
bPaddingValueExists = true;
}
// Allocate a buffer for the destination data
///////////////////////////////////////////////////////////
ptr<buffer> waveformBuffer(new buffer(0, "SL"));
ptr<handlers::dataHandler> destinationHandler(waveformBuffer->getDataHandler(true, numSamples));
// Copy the data to the destination for unsigned values
///////////////////////////////////////////////////////////
std::uint32_t waveformPointer(channel);
std::uint32_t destinationPointer(0);
if(sourceDataType == "UB" || sourceDataType == "US")
{
for(std::uint32_t copySamples (numSamples); copySamples != 0; --copySamples)
{
std::uint32_t unsignedData(waveformData->getUnsignedLong(waveformPointer));
waveformPointer += numChannels;
if(bPaddingValueExists && unsignedData == originalPaddingValue)
{
destinationHandler->setSignedLong(destinationPointer++, paddingValue);
continue;
}
destinationHandler->setUnsignedLong(destinationPointer++, unsignedData);
}
return destinationHandler;
}
// Copy the data to the destination for signed values
///////////////////////////////////////////////////////////
int highBit(getBitsAllocated() - 1);
std::uint32_t testBit = ((std::uint32_t)1) << highBit;
std::uint32_t orBits = ((std::uint32_t)((std::int32_t)-1)) << highBit;
for(std::uint32_t copySamples (numSamples); copySamples != 0; --copySamples)
{
std::uint32_t unsignedData = waveformData->getUnsignedLong(waveformPointer);
waveformPointer += numChannels;
if(bPaddingValueExists && unsignedData == originalPaddingValue)
{
destinationHandler->setSignedLong(destinationPointer++, paddingValue);;
continue;
}
if((unsignedData & testBit) != 0)
{
unsignedData |= orBits;
}
destinationHandler->setSignedLong(destinationPointer++, (std::int32_t)unsignedData);
}
// Now decompress uLaw or aLaw
if(waveformInterpretation == "AB") // 8bits aLaw
{
for(std::uint32_t aLawSamples(0); aLawSamples != numSamples; ++aLawSamples)
{
std::uint32_t compressed(destinationHandler->getUnsignedLong(aLawSamples));
if(bPaddingValueExists && compressed == originalPaddingValue)
{
continue;
}
std::int32_t decompressed(aLawDecompressTable[compressed]);
destinationHandler->setSignedLong(aLawSamples, decompressed);
}
}
// Now decompress uLaw or aLaw
if(waveformInterpretation == "MB") // 8bits aLaw
{
for(std::uint32_t uLawSamples(0); uLawSamples != numSamples; ++uLawSamples)
{
std::uint32_t compressed(destinationHandler->getUnsignedLong(uLawSamples));
if(bPaddingValueExists && compressed == originalPaddingValue)
{
continue;
}
std::int32_t decompressed(uLawDecompressTable[compressed]);
destinationHandler->setSignedLong(uLawSamples, decompressed);
}
}
return destinationHandler;
PUNTOEXE_FUNCTION_END();
}