Matrix LiuWestParticleFilter::state_distribution(RNG *rng) const {
if (rng) {
Resampler resampler(particle_weights(), false);
return to_matrix(resampler(state_particles_, -1, *rng));
} else {
return to_matrix(state_particles_);
}
}
void SoundProcessor::downSample(const QByteArray& rawAudioByteArray, int sampleRate) {
// we want to convert it to the format that the audio-mixer wants
// which is signed, 16-bit, 24Khz
if (sampleRate == AudioConstants::SAMPLE_RATE) {
// no resampling needed
_data = rawAudioByteArray;
} else {
int numChannels = _isAmbisonic ? AudioConstants::AMBISONIC : (_isStereo ? AudioConstants::STEREO : AudioConstants::MONO);
AudioSRC resampler(sampleRate, AudioConstants::SAMPLE_RATE, numChannels);
// resize to max possible output
int numSourceFrames = rawAudioByteArray.size() / (numChannels * sizeof(AudioConstants::AudioSample));
int maxDestinationFrames = resampler.getMaxOutput(numSourceFrames);
int maxDestinationBytes = maxDestinationFrames * numChannels * sizeof(AudioConstants::AudioSample);
_data.resize(maxDestinationBytes);
int numDestinationFrames = resampler.render((int16_t*)rawAudioByteArray.data(),
(int16_t*)_data.data(),
numSourceFrames);
// truncate to actual output
int numDestinationBytes = numDestinationFrames * numChannels * sizeof(AudioConstants::AudioSample);
_data.resize(numDestinationBytes);
}
}
void operator()(
const float baseband_sample
) {
resampler(baseband_sample,
[this](const float interpolated_sample) {
this->resampler_callback(interpolated_sample);
}
);
}
void ResamplerTest::testUpsamplingTriangle()
{
generateTriangularSignal();
std::cout << "Test Upsampling Triangle" << std::endl;
Resampler resampler(44100);
performUpsampling(resampler);
AudioBuffer tmpInputBuffer(TMP_LOWSMPLR_BUFFER_LENGTH, AudioFormat::MONO());
AudioBuffer tmpOutputBuffer(TMP_HIGHSMPLR_BUFFER_LENGTH, AudioFormat(16000, 1));
tmpInputBuffer.copy(inputBuffer);
std::cout << "Input Buffer" << std::endl;
print_buffer(*tmpInputBuffer.getChannel(0));
tmpOutputBuffer.copy(outputBuffer);
std::cout << "Output Buffer" << std::endl;
print_buffer(*tmpOutputBuffer.getChannel(0));
}
void ResamplerTest::testUpsamplingRamp()
{
// generate input samples and store them in inputBuffer
generateRamp();
std::cout << "Test Upsampling Ramp" << std::endl;
Resampler resampler(44100);
performUpsampling(resampler);
AudioBuffer tmpInputBuffer(TMP_LOWSMPLR_BUFFER_LENGTH, AudioFormat::MONO());
AudioBuffer tmpOutputBuffer(TMP_HIGHSMPLR_BUFFER_LENGTH, AudioFormat(16000, 1));
tmpInputBuffer.copy(inputBuffer);
std::cout << "Input Buffer" << std::endl;
print_buffer(*tmpInputBuffer.getChannel(0));
tmpOutputBuffer.copy(outputBuffer);
std::cout << "Output Buffer" << std::endl;
print_buffer(*tmpOutputBuffer.getChannel(0));
}
AudioInjector* AudioInjector::playSound(const QString& soundUrl, const float volume, const float stretchFactor, const glm::vec3 position) {
if (soundUrl.isEmpty()) {
return NULL;
}
auto soundCache = DependencyManager::get<SoundCache>();
if (soundCache.isNull()) {
return NULL;
}
SharedSoundPointer sound = soundCache->getSound(QUrl(soundUrl));
if (sound.isNull() || !sound->isReady()) {
return NULL;
}
AudioInjectorOptions options;
options.stereo = sound->isStereo();
options.position = position;
options.volume = volume;
QByteArray samples = sound->getByteArray();
if (stretchFactor == 1.0f) {
return playSoundAndDelete(samples, options, NULL);
}
const int standardRate = AudioConstants::SAMPLE_RATE;
const int resampledRate = standardRate * stretchFactor;
const int channelCount = sound->isStereo() ? 2 : 1;
AudioSRC resampler(standardRate, resampledRate, channelCount);
const int nInputFrames = samples.size() / (channelCount * sizeof(int16_t));
const int maxOutputFrames = resampler.getMaxOutput(nInputFrames);
QByteArray resampled(maxOutputFrames * channelCount * sizeof(int16_t), '\0');
int nOutputFrames = resampler.render(reinterpret_cast<const int16_t*>(samples.data()),
reinterpret_cast<int16_t*>(resampled.data()),
nInputFrames);
Q_UNUSED(nOutputFrames);
return playSoundAndDelete(resampled, options, NULL);
}
void Sound::downSample(const QByteArray& rawAudioByteArray) {
// assume that this was a RAW file and is now an array of samples that are
// signed, 16-bit, 48Khz
// we want to convert it to the format that the audio-mixer wants
// which is signed, 16-bit, 24Khz
int numChannels = _isStereo ? 2 : 1;
AudioSRC resampler(48000, AudioConstants::SAMPLE_RATE, numChannels);
// resize to max possible output
int numSourceFrames = rawAudioByteArray.size() / (numChannels * sizeof(AudioConstants::AudioSample));
int maxDestinationFrames = resampler.getMaxOutput(numSourceFrames);
int maxDestinationBytes = maxDestinationFrames * numChannels * sizeof(AudioConstants::AudioSample);
_byteArray.resize(maxDestinationBytes);
int numDestinationFrames = resampler.render((int16_t*)rawAudioByteArray.data(),
(int16_t*)_byteArray.data(),
numSourceFrames);
// truncate to actual output
int numDestinationBytes = numDestinationFrames * numChannels * sizeof(AudioConstants::AudioSample);
_byteArray.resize(numDestinationBytes);
}
void test_resampler_one_way(uint32_t channels, uint32_t source_rate, uint32_t target_rate, float chunk_duration)
{
size_t chunk_duration_in_source_frames = static_cast<uint32_t>(ceil(chunk_duration * source_rate / 1000.));
float resampling_ratio = static_cast<float>(source_rate) / target_rate;
cubeb_resampler_speex_one_way<T> resampler(channels, source_rate, target_rate, 3);
auto_array<T> source(channels * source_rate * 10);
auto_array<T> destination(channels * target_rate * 10);
auto_array<T> expected(channels * target_rate * 10);
uint32_t phase_index = 0;
uint32_t offset = 0;
const uint32_t buf_len = 2; /* seconds */
// generate a sine wave in each channel, at the source sample rate
source.push_silence(channels * source_rate * buf_len);
while(offset != source.length()) {
float p = phase_index++ / static_cast<float>(source_rate);
for (uint32_t j = 0; j < channels; j++) {
source.data()[offset++] = 0.5 * sin(440. * 2 * PI * p);
}
}
dump("input.raw", source.data(), source.length());
expected.push_silence(channels * target_rate * buf_len);
// generate a sine wave in each channel, at the target sample rate.
// Insert silent samples at the beginning to account for the resampler latency.
offset = resampler.latency() * channels;
for (uint32_t i = 0; i < offset; i++) {
expected.data()[i] = 0.0f;
}
phase_index = 0;
while (offset != expected.length()) {
float p = phase_index++ / static_cast<float>(target_rate);
for (uint32_t j = 0; j < channels; j++) {
expected.data()[offset++] = 0.5 * sin(440. * 2 * PI * p);
}
}
dump("expected.raw", expected.data(), expected.length());
// resample by chunk
uint32_t write_offset = 0;
destination.push_silence(channels * target_rate * buf_len);
while (write_offset < destination.length())
{
size_t output_frames = static_cast<uint32_t>(floor(chunk_duration_in_source_frames / resampling_ratio));
uint32_t input_frames = resampler.input_needed_for_output(output_frames);
resampler.input(source.data(), input_frames);
source.pop(nullptr, input_frames * channels);
resampler.output(destination.data() + write_offset,
std::min(output_frames, (destination.length() - write_offset) / channels));
write_offset += output_frames * channels;
}
dump("output.raw", destination.data(), expected.length());
// compare, taking the latency into account
bool fuzzy_equal = true;
for (uint32_t i = resampler.latency() + 1; i < expected.length(); i++) {
float diff = fabs(expected.data()[i] - destination.data()[i]);
if (diff > epsilon<T>(resampling_ratio)) {
fprintf(stderr, "divergence at %d: %f %f (delta %f)\n", i, expected.data()[i], destination.data()[i], diff);
fuzzy_equal = false;
}
}
ASSERT_TRUE(fuzzy_equal);
}
bool EffectSBSMS::Process()
{
bool bGoodResult = true;
//Iterate over each track
//Track::All is needed because this effect needs to introduce silence in the group tracks to keep sync
this->CopyInputTracks(Track::All); // Set up mOutputTracks.
TrackListIterator iter(mOutputTracks);
Track* t;
mCurTrackNum = 0;
double maxDuration = 0.0;
// Must sync if selection length will change
bool mustSync = (rateStart != rateEnd);
Slide rateSlide(rateSlideType,rateStart,rateEnd);
Slide pitchSlide(pitchSlideType,pitchStart,pitchEnd);
mTotalStretch = rateSlide.getTotalStretch();
t = iter.First();
while (t != NULL) {
if (t->GetKind() == Track::Label &&
(t->GetSelected() || (mustSync && t->IsSyncLockSelected())) )
{
if (!ProcessLabelTrack(t)) {
bGoodResult = false;
break;
}
}
else if (t->GetKind() == Track::Wave && t->GetSelected() )
{
WaveTrack* leftTrack = (WaveTrack*)t;
//Get start and end times from track
mCurT0 = leftTrack->GetStartTime();
mCurT1 = leftTrack->GetEndTime();
//Set the current bounds to whichever left marker is
//greater and whichever right marker is less
mCurT0 = wxMax(mT0, mCurT0);
mCurT1 = wxMin(mT1, mCurT1);
// Process only if the right marker is to the right of the left marker
if (mCurT1 > mCurT0) {
sampleCount start;
sampleCount end;
start = leftTrack->TimeToLongSamples(mCurT0);
end = leftTrack->TimeToLongSamples(mCurT1);
WaveTrack* rightTrack = NULL;
if (leftTrack->GetLinked()) {
double t;
rightTrack = (WaveTrack*)(iter.Next());
//Adjust bounds by the right tracks markers
t = rightTrack->GetStartTime();
t = wxMax(mT0, t);
mCurT0 = wxMin(mCurT0, t);
t = rightTrack->GetEndTime();
t = wxMin(mT1, t);
mCurT1 = wxMax(mCurT1, t);
//Transform the marker timepoints to samples
start = leftTrack->TimeToLongSamples(mCurT0);
end = leftTrack->TimeToLongSamples(mCurT1);
mCurTrackNum++; // Increment for rightTrack, too.
}
sampleCount trackStart = leftTrack->TimeToLongSamples(leftTrack->GetStartTime());
sampleCount trackEnd = leftTrack->TimeToLongSamples(leftTrack->GetEndTime());
// SBSMS has a fixed sample rate - we just convert to its sample rate and then convert back
float srTrack = leftTrack->GetRate();
float srProcess = bLinkRatePitch?srTrack:44100.0;
// the resampler needs a callback to supply its samples
ResampleBuf rb;
sampleCount maxBlockSize = leftTrack->GetMaxBlockSize();
rb.blockSize = maxBlockSize;
rb.buf = (audio*)calloc(rb.blockSize,sizeof(audio));
rb.leftTrack = leftTrack;
rb.rightTrack = rightTrack?rightTrack:leftTrack;
rb.leftBuffer = (float*)calloc(maxBlockSize,sizeof(float));
rb.rightBuffer = (float*)calloc(maxBlockSize,sizeof(float));
// Samples in selection
sampleCount samplesIn = end-start;
// Samples for SBSMS to process after resampling
sampleCount samplesToProcess = (sampleCount) ((float)samplesIn*(srProcess/srTrack));
SlideType outSlideType;
SBSMSResampleCB outResampleCB;
sampleCount processPresamples = 0;
sampleCount trackPresamples = 0;
if(bLinkRatePitch) {
rb.bPitch = true;
outSlideType = rateSlideType;
outResampleCB = resampleCB;
rb.offset = start;
rb.end = end;
rb.iface = new SBSMSInterfaceSliding(&rateSlide,&pitchSlide,
bPitchReferenceInput,
samplesToProcess,0,
NULL);
} else {
rb.bPitch = false;
outSlideType = (srProcess==srTrack?SlideIdentity:SlideConstant);
outResampleCB = postResampleCB;
rb.ratio = srProcess/srTrack;
rb.quality = new SBSMSQuality(&SBSMSQualityStandard);
rb.resampler = new Resampler(resampleCB, &rb, srProcess==srTrack?SlideIdentity:SlideConstant);
rb.sbsms = new SBSMS(rightTrack?2:1,rb.quality,true);
rb.SBSMSBlockSize = rb.sbsms->getInputFrameSize();
rb.SBSMSBuf = (audio*)calloc(rb.SBSMSBlockSize,sizeof(audio));
processPresamples = wxMin(rb.quality->getMaxPresamples(),
(long)((float)(start-trackStart)*(srProcess/srTrack)));
trackPresamples = wxMin(start-trackStart,
(long)((float)(processPresamples)*(srTrack/srProcess)));
rb.offset = start - trackPresamples;
rb.end = trackEnd;
rb.iface = new SBSMSEffectInterface(rb.resampler,
&rateSlide,&pitchSlide,
bPitchReferenceInput,
samplesToProcess,processPresamples,
rb.quality);
}
Resampler resampler(outResampleCB,&rb,outSlideType);
audio outBuf[SBSMSOutBlockSize];
float outBufLeft[2*SBSMSOutBlockSize];
float outBufRight[2*SBSMSOutBlockSize];
// Samples in output after SBSMS
sampleCount samplesToOutput = rb.iface->getSamplesToOutput();
// Samples in output after resampling back
sampleCount samplesOut = (sampleCount) ((float)samplesToOutput * (srTrack/srProcess));
// Duration in track time
double duration = (mCurT1-mCurT0) * mTotalStretch;
if(duration > maxDuration)
maxDuration = duration;
TimeWarper *warper = createTimeWarper(mCurT0,mCurT1,maxDuration,rateStart,rateEnd,rateSlideType);
SetTimeWarper(warper);
rb.outputLeftTrack = mFactory->NewWaveTrack(leftTrack->GetSampleFormat(),
leftTrack->GetRate());
if(rightTrack)
rb.outputRightTrack = mFactory->NewWaveTrack(rightTrack->GetSampleFormat(),
rightTrack->GetRate());
long pos = 0;
long outputCount = -1;
// process
while(pos<samplesOut && outputCount) {
long frames;
if(pos+SBSMSOutBlockSize>samplesOut) {
frames = samplesOut - pos;
} else {
frames = SBSMSOutBlockSize;
}
outputCount = resampler.read(outBuf,frames);
for(int i = 0; i < outputCount; i++) {
outBufLeft[i] = outBuf[i][0];
if(rightTrack)
outBufRight[i] = outBuf[i][1];
}
pos += outputCount;
rb.outputLeftTrack->Append((samplePtr)outBufLeft, floatSample, outputCount);
if(rightTrack)
rb.outputRightTrack->Append((samplePtr)outBufRight, floatSample, outputCount);
double frac = (double)pos/(double)samplesOut;
int nWhichTrack = mCurTrackNum;
if(rightTrack) {
nWhichTrack = 2*(mCurTrackNum/2);
if (frac < 0.5)
frac *= 2.0; // Show twice as far for each track, because we're doing 2 at once.
else {
nWhichTrack++;
frac -= 0.5;
frac *= 2.0; // Show twice as far for each track, because we're doing 2 at once.
}
}
if (TrackProgress(nWhichTrack, frac))
return false;
}
rb.outputLeftTrack->Flush();
if(rightTrack)
rb.outputRightTrack->Flush();
bool bResult =
leftTrack->ClearAndPaste(mCurT0, mCurT1, rb.outputLeftTrack,
true, false, GetTimeWarper());
wxASSERT(bResult); // TO DO: Actually handle this.
wxUnusedVar(bResult);
if(rightTrack)
{
bResult =
rightTrack->ClearAndPaste(mCurT0, mCurT1, rb.outputRightTrack,
true, false, GetTimeWarper());
wxASSERT(bResult); // TO DO: Actually handle this.
}
}
mCurTrackNum++;
}
else if (mustSync && t->IsSyncLockSelected())
{
t->SyncLockAdjust(mCurT1, mCurT0 + (mCurT1 - mCurT0) * mTotalStretch);
}
//Iterate to the next track
t = iter.Next();
}
if (bGoodResult)
ReplaceProcessedTracks(bGoodResult);
// Update selection
mT0 = mCurT0;
mT1 = mCurT0 + maxDuration;
return bGoodResult;
}
void WSMSGridder::Predict(double* real, double* imaginary)
{
if(imaginary==0 && IsComplex())
throw std::runtime_error("Missing imaginary in complex prediction");
if(imaginary!=0 && !IsComplex())
throw std::runtime_error("Imaginary specified in non-complex prediction");
MSData* msDataVector = new MSData[MeasurementSetCount()];
_hasFrequencies = false;
for(size_t i=0; i!=MeasurementSetCount(); ++i)
initializeMeasurementSet(i, msDataVector[i]);
double minW = msDataVector[0].minW;
double maxW = msDataVector[0].maxW;
for(size_t i=1; i!=MeasurementSetCount(); ++i)
{
if(msDataVector[i].minW < minW) minW = msDataVector[i].minW;
if(msDataVector[i].maxW > maxW) maxW = msDataVector[i].maxW;
}
_gridder = std::unique_ptr<WStackingGridder>(new WStackingGridder(_actualInversionWidth, _actualInversionHeight, _actualPixelSizeX, _actualPixelSizeY, _cpuCount, _imageBufferAllocator, AntialiasingKernelSize(), OverSamplingFactor()));
_gridder->SetGridMode(_gridMode);
if(_denormalPhaseCentre)
_gridder->SetDenormalPhaseCentre(_phaseCentreDL, _phaseCentreDM);
_gridder->SetIsComplex(IsComplex());
//_imager->SetImageConjugatePart(Polarization() == Polarization::YX && IsComplex());
_gridder->PrepareWLayers(WGridSize(), double(_memSize)*(7.0/10.0), minW, maxW);
if(Verbose())
{
for(size_t i=0; i!=MeasurementSetCount(); ++i)
countSamplesPerLayer(msDataVector[i]);
}
double *resizedReal = 0, *resizedImag = 0;
if(ImageWidth()!=_actualInversionWidth || ImageHeight()!=_actualInversionHeight)
{
FFTResampler resampler(ImageWidth(), ImageHeight(), _actualInversionWidth, _actualInversionHeight, _cpuCount);
if(imaginary == 0)
{
resizedReal = _imageBufferAllocator->Allocate(ImageWidth() * ImageHeight());
resampler.RunSingle(real, resizedReal);
real = resizedReal;
}
else {
resizedReal = _imageBufferAllocator->Allocate(ImageWidth() * ImageHeight());
resizedImag = _imageBufferAllocator->Allocate(ImageWidth() * ImageHeight());
resampler.Start();
resampler.AddTask(real, resizedReal);
resampler.AddTask(imaginary, resizedImag);
resampler.Finish();
real = resizedReal;
imaginary = resizedImag;
}
}
for(size_t pass=0; pass!=_gridder->NPasses(); ++pass)
{
std::cout << "Fourier transforms for pass " << pass << "... ";
if(Verbose()) std::cout << '\n';
else std::cout << std::flush;
if(imaginary == 0)
_gridder->InitializePrediction(real);
else
_gridder->InitializePrediction(real, imaginary);
_gridder->StartPredictionPass(pass);
std::cout << "Predicting...\n";
for(size_t i=0; i!=MeasurementSetCount(); ++i)
predictMeasurementSet(msDataVector[i]);
}
if(ImageWidth()!=_actualInversionWidth || ImageHeight()!=_actualInversionHeight)
{
_imageBufferAllocator->Free(resizedReal);
_imageBufferAllocator->Free(resizedImag);
}
size_t totalRowsWritten = 0, totalMatchingRows = 0;
for(size_t i=0; i!=MeasurementSetCount(); ++i)
{
totalRowsWritten += msDataVector[i].totalRowsProcessed;
totalMatchingRows += msDataVector[i].matchingRows;
}
std::cout << "Total rows written: " << totalRowsWritten;
if(totalMatchingRows != 0)
std::cout << " (overhead: " << std::max(0.0, round(totalRowsWritten * 100.0 / totalMatchingRows - 100.0)) << "%)";
std::cout << '\n';
delete[] msDataVector;
}
void WSMSGridder::Invert()
{
MSData* msDataVector = new MSData[MeasurementSetCount()];
_hasFrequencies = false;
for(size_t i=0; i!=MeasurementSetCount(); ++i)
initializeMeasurementSet(i, msDataVector[i]);
double minW = msDataVector[0].minW;
double maxW = msDataVector[0].maxW;
for(size_t i=1; i!=MeasurementSetCount(); ++i)
{
if(msDataVector[i].minW < minW) minW = msDataVector[i].minW;
if(msDataVector[i].maxW > maxW) maxW = msDataVector[i].maxW;
}
_gridder = std::unique_ptr<WStackingGridder>(new WStackingGridder(_actualInversionWidth, _actualInversionHeight, _actualPixelSizeX, _actualPixelSizeY, _cpuCount, _imageBufferAllocator, AntialiasingKernelSize(), OverSamplingFactor()));
_gridder->SetGridMode(_gridMode);
if(_denormalPhaseCentre)
_gridder->SetDenormalPhaseCentre(_phaseCentreDL, _phaseCentreDM);
_gridder->SetIsComplex(IsComplex());
//_imager->SetImageConjugatePart(Polarization() == Polarization::YX && IsComplex());
_gridder->PrepareWLayers(WGridSize(), double(_memSize)*(7.0/10.0), minW, maxW);
if(Verbose())
{
for(size_t i=0; i!=MeasurementSetCount(); ++i)
countSamplesPerLayer(msDataVector[i]);
}
_totalWeight = 0.0;
for(size_t pass=0; pass!=_gridder->NPasses(); ++pass)
{
std::cout << "Gridding pass " << pass << "... ";
if(Verbose()) std::cout << '\n';
else std::cout << std::flush;
_inversionWorkLane.reset(new ao::lane<InversionWorkItem>(2048));
_gridder->StartInversionPass(pass);
for(size_t i=0; i!=MeasurementSetCount(); ++i)
{
_inversionWorkLane->clear();
MSData& msData = msDataVector[i];
const MultiBandData selectedBand(msData.SelectedBand());
boost::thread thread(&WSMSGridder::workThreadParallel, this, &selectedBand);
gridMeasurementSet(msData);
_inversionWorkLane->write_end();
thread.join();
}
_inversionWorkLane.reset();
std::cout << "Fourier transforms...\n";
_gridder->FinishInversionPass();
}
if(Verbose())
{
size_t totalRowsRead = 0, totalMatchingRows = 0;
for(size_t i=0; i!=MeasurementSetCount(); ++i)
{
totalRowsRead += msDataVector[i].totalRowsProcessed;
totalMatchingRows += msDataVector[i].matchingRows;
}
std::cout << "Total rows read: " << totalRowsRead;
if(totalMatchingRows != 0)
std::cout << " (overhead: " << std::max(0.0, round(totalRowsRead * 100.0 / totalMatchingRows - 100.0)) << "%)";
std::cout << '\n';
}
if(NormalizeForWeighting())
_gridder->FinalizeImage(1.0/_totalWeight, false);
else {
std::cout << "Not dividing by normalization factor of " << _totalWeight << ".\n";
_gridder->FinalizeImage(1.0, true);
}
if(ImageWidth()!=_actualInversionWidth || ImageHeight()!=_actualInversionHeight)
{
FFTResampler resampler(_actualInversionWidth, _actualInversionHeight, ImageWidth(), ImageHeight(), _cpuCount);
if(IsComplex())
{
double *resizedReal = _imageBufferAllocator->Allocate(ImageWidth() * ImageHeight());
double *resizedImag = _imageBufferAllocator->Allocate(ImageWidth() * ImageHeight());
resampler.Start();
resampler.AddTask(_gridder->RealImage(), resizedReal);
resampler.AddTask(_gridder->ImaginaryImage(), resizedImag);
resampler.Finish();
_gridder->ReplaceRealImageBuffer(resizedReal);
_gridder->ReplaceImaginaryImageBuffer(resizedImag);
}
else {
double *resized = _imageBufferAllocator->Allocate(ImageWidth() * ImageHeight());
resampler.RunSingle(_gridder->RealImage(), resized);
_gridder->ReplaceRealImageBuffer(resized);
}
}
delete[] msDataVector;
}
static void test_resampler(void)
{
std::string fbody("sweep_440-3520_1s");
mcon::Vector<double> input;
mfio::Wave wave;
wave.Read(fbody + std::string(".wav"), input);
const int baseFs = wave.GetSamplingRate();
const int targetFs = 16000;
const double fp = 0.35;
const double fs = 0.45;
masp::Resampler resampler(targetFs, baseFs, fp, fs);
resampler.MakeFilterByWindowType(masp::Resampler::HANNING);
{
mcon::Vector<double> coefs;
resampler.GetCoefficients(coefs);
LOG("Length=%d\n", static_cast<int>(coefs.GetLength()));
}
{
mcon::Vector<double> output;
resampler.Convert(output, input);
output *= 32767.0/output.GetMaximumAbsolute();
mfio::Wave w(targetFs, wave.GetNumChannels(), wave.GetBitDepth());
w.Write(fbody + std::string("_resampled1.wav"), output);
}
const double ripple = 0.01;
const double decay = 80;
resampler.MakeFilterBySpec(ripple, decay);
{
mcon::Vector<double> coefs;
resampler.GetCoefficients(coefs);
LOG("Length=%d\n", static_cast<int>(coefs.GetLength()));
}
{
mcon::Vector<double> output;
resampler.Convert(output, input);
output *= 32767.0/output.GetMaximumAbsolute();
mfio::Wave w(targetFs, wave.GetNumChannels(), wave.GetBitDepth());
w.Write(fbody + std::string("_resampled2.wav"), output);
}
// サンプルの数を変更する
// ==> 実質的に周波数変換？
// ==> 違う気がする...
{
const int N = 100;
const double ratio = 1.5;
const double fp = 0.35;
const double fs = 0.45;
const double ripple = 0.01;
const double decay = 80;
mcon::Vector<double> src(N);
for (int k = 0; k < N; ++k)
{
src[k] = k;
}
resampler.Initialize(static_cast<int>(ratio * N), N, fp, fs);
resampler.MakeFilterBySpec(ripple, decay);
mcon::Vector<double> dst;
resampler.Convert(dst, src);
mfio::Csv::Write("sample_count_convert.csv", dst);
}
}
