/**
Applies polyphase FIR filter
Coefficients create a 24 kHz low pass filter for a 192 kHz wave
*/
void AudioProcessing::TestSimpleConvolution( const juce::File & input )
{
const int polyphase4Size = sizeof(filterPhase0) / sizeof(float);
const int convolutionSize = 4 * polyphase4Size;
juce::AudioSampleBuffer convolutionFilter( 1, convolutionSize );
float * data = convolutionFilter.getWritePointer( 0 );
for ( int i = 0 ; i < polyphase4Size ; ++ i )
{
*data++ = filterPhase0[ i ];
*data++ = filterPhase1[ i ];
*data++ = filterPhase2[ i ];
*data++ = filterPhase3[ i ];
}
juce::AudioFormatManager audioFormatManager;
audioFormatManager.registerBasicFormats();
juce::AudioFormatReader * reader = audioFormatManager.createReaderFor( input );
if ( reader != nullptr )
{
// read file
juce::AudioSampleBuffer origin( (int)reader->numChannels, (int)reader->lengthInSamples );
reader->read( &origin, 0, (int)reader->lengthInSamples, 0, true, true );
// Convolve
juce::AudioSampleBuffer output;
convolution( origin, convolutionFilter, output );
output.applyGain(0.25f); // filter values use sample with 3 zeros per valid sample (1 / 4)
juce::String outputName = input.getFullPathName().substring(0, input.getFullPathName().length() - 4);
juce::File outputFile( outputName + "_convolution.wav" );
juce::FileOutputStream * outputStream = new juce::FileOutputStream( outputFile );
juce::WavAudioFormat wavAudioFormat;
juce::StringPairArray emptyArray;
juce::AudioFormatWriter * writer = wavAudioFormat.createWriterFor(
outputStream, reader->sampleRate, reader->numChannels, 24, emptyArray, 0 );
if ( writer != nullptr )
{
writer->writeFromAudioSampleBuffer( output, 0, output.getNumSamples() );
delete writer;
}
delete reader;
}
}
void AudioProcessing::TestOversampling( const juce::File & input )
{
juce::AudioFormatManager audioFormatManager;
audioFormatManager.registerBasicFormats();
juce::AudioFormatReader * reader = audioFormatManager.createReaderFor( input );
if ( reader != nullptr )
{
// read file
juce::AudioSampleBuffer origin( (int)reader->numChannels, (int)reader->lengthInSamples );
reader->read( &origin, 0, (int)reader->lengthInSamples, 0, true, true );
// Use polyphase FIR filter with coefficients for upsampling 4 times at 48KHz
juce::AudioSampleBuffer output;
polyphase4( origin, output );
juce::String outputName = input.getFullPathName().substring(0, input.getFullPathName().length() - 4);
juce::File outputFile( outputName + "_polyphase4.wav" );
juce::FileOutputStream * outputStream = new juce::FileOutputStream( outputFile );
juce::WavAudioFormat wavAudioFormat;
juce::StringPairArray emptyArray;
juce::AudioFormatWriter * writer = wavAudioFormat.createWriterFor(
outputStream, reader->sampleRate, reader->numChannels, 24, emptyArray, 0 );
if ( writer != nullptr )
{
writer->writeFromAudioSampleBuffer( output, 0, output.getNumSamples() );
delete writer;
}
delete reader;
}
}
void CodeFileList::addDirectory (const juce::File& file)
{
if (file.isDirectory())
{
juce::Array<juce::File> results;
file.findChildFiles (results, juce::File::findFiles, true, wildcards);
for (int i = results.size(); --i >= 0;)
files.addIfNotAlreadyThere (results.getReference (i).getFullPathName()); //N.B.: Don't use addFile() - it will be a redundant check to see if the file is valid
}
else
{
addFile (file.getFullPathName());
}
}
void InterfaceComponent::buttonClicked (juce::Button* button)
{
if (button == &btnBrowse)
{
juce::FileChooser chooser ("Select the folder which contains the code files you want to modularise");
if (chooser.browseForDirectory())
{
const juce::File folder (chooser.getResult());
txtSourceFileFolder.setText (folder.getFullPathName().trim(), juce::sendNotification);
txtDestinationFolder.setText (folder.getParentDirectory().getFullPathName().trim(), juce::sendNotification);
files = Modulariser (folder, true).getFiles();
fileListBox.setSelectedRows (juce::SparseSet<int>());
fileListBox.updateContent();
}
}
else if (button == &btnRefresh)
{
refresh();
}
else if (button == &btnGenerate)
{
const juce::String srcFolder (txtSourceFileFolder.getText().trim());
const juce::String destFolder (txtDestinationFolder.getText().trim());
if (srcFolder.isNotEmpty()
&& destFolder.isNotEmpty()
&& juce::File::isAbsolutePath (srcFolder)
&& juce::File::isAbsolutePath (destFolder))
{
Modulariser modulariser (files);
modulariser.saveTo (juce::File (destFolder),
srcFolder,
txtModuleFilename.getText().trim(),
txtHeaderGuard.getText().trim(),
txtNamespace.getText().trim());
}
}
}
void CodeFileList::addFile (const juce::File& file)
{
addFile (file.getFullPathName().trim());
}