private void InitializeSoundOut(IWaveSource soundSource)
{
// SoundOut implementation which plays the sound
this.soundOut = new WasapiOut(this.eventSync, this.audioClientShareMode, this.latency, ThreadPriority.Highest);
// MMNotificationClient
this.MMNotificationClient = new MMNotificationClient();
this.MMNotificationClient.DefaultDeviceChanged += this.MMNotificationClient_DefaultDeviceChanged;
// Initialize the soundOut
this.notificationSource = new SingleBlockNotificationStream(soundSource.ToSampleSource());
this.soundOut.Initialize(this.notificationSource.ToWaveSource(16));
// Create the FFT provider
this.fftProvider = new FftProvider(this.soundOut.WaveSource.WaveFormat.Channels, FftSize.Fft2048);
this.notificationSource.SingleBlockRead += this.InputStream_Sample;
this.soundOut.Stopped += this.SoundOutStoppedHandler;
this.soundOut.Volume = this.volume;
}
public ParticleMoveSystem(World world)
{
particleSet = world.GetEntities().With <Translation>().With <Velocity>().AsSet();
capture = new WasapiLoopbackCapture();
capture.Initialize();
var soundInSource = new SoundInSource(capture);
var source = soundInSource.ToSampleSource();
fft = new FftProvider(source.WaveFormat.Channels, fftSize);
var notificationSource = new SingleBlockNotificationStream(source);
notificationSource.SingleBlockRead += SingleBlockRead;
waveSource = notificationSource.ToWaveSource(16);
buffer = new byte[waveSource.WaveFormat.BytesPerSecond / 2];
soundInSource.DataAvailable += DataAvailable;
// capture.DataAvailable += (sender, args) => DataAvailable(sender, args);
capture.Start();
}
public WrapperSpectrumPlayer(CSCorePlayer player, SpectrumChannel channel,
ICollection <EventHandler <SingleBlockReadEventArgs> > inputStreamList)
{
this.player = player;
this.player.PropertyChanged += (_, __) => PropertyChanged(_, __);
this.soundOut = player.soundOut;
fftProvider = new FftProvider(2, FftSize.Fft1024);
if (channel != SpectrumChannel.Stereo)
{
if (channel == SpectrumChannel.Left)
{
if (this.player.notificationSource != null)
{
this.player.notificationSource.SingleBlockRead += InputStream_LeftSample;
}
inputStreamList.Add(InputStream_LeftSample);
}
if (channel == SpectrumChannel.Right)
{
if (this.player.notificationSource != null)
{
this.player.notificationSource.SingleBlockRead += InputStream_RightSample;
}
inputStreamList.Add(InputStream_RightSample);
}
}
else
{
if (this.player.notificationSource != null)
{
this.player.notificationSource.SingleBlockRead += InputStream_Sample;
}
inputStreamList.Add(InputStream_Sample);
}
}
private async Task Play()
{
if (IsPlaying)
{
Pause();
return;
}
if (_audioGraph == null)
{
var settings = new AudioGraphSettings(AudioRenderCategory.Media)
{
PrimaryRenderDevice = SelectedDevice
};
var createResult = await AudioGraph.CreateAsync(settings);
if (createResult.Status != AudioGraphCreationStatus.Success)
{
return;
}
_audioGraph = createResult.Graph;
_audioGraph.UnrecoverableErrorOccurred += OnAudioGraphError;
}
if (_deviceOutputNode == null)
{
var deviceResult = await _audioGraph.CreateDeviceOutputNodeAsync();
if (deviceResult.Status != AudioDeviceNodeCreationStatus.Success)
{
return;
}
_deviceOutputNode = deviceResult.DeviceOutputNode;
}
if (_frameOutputNode == null)
{
_frameOutputNode = _audioGraph.CreateFrameOutputNode();
_audioGraph.QuantumProcessed += GraphOnQuantumProcessed;
}
if (_fileInputNode == null)
{
if (CurrentPlayingFile == null)
{
return;
}
var fileResult = await _audioGraph.CreateFileInputNodeAsync(CurrentPlayingFile);
if (fileResult.Status != AudioFileNodeCreationStatus.Success)
{
return;
}
_fileInputNode = fileResult.FileInputNode;
_fileInputNode.AddOutgoingConnection(_deviceOutputNode);
_fileInputNode.AddOutgoingConnection(_frameOutputNode);
Duration = _fileInputNode.Duration;
_fileInputNode.PlaybackSpeedFactor = PlaybackSpeed / 100.0;
_fileInputNode.OutgoingGain = Volume / 100.0;
_fileInputNode.FileCompleted += FileInputNodeOnFileCompleted;
}
Debug.WriteLine($" CompletedQuantumCount: {_audioGraph.CompletedQuantumCount}");
Debug.WriteLine($"SamplesPerQuantum: {_audioGraph.SamplesPerQuantum}");
Debug.WriteLine($"LatencyInSamples: {_audioGraph.LatencyInSamples}");
var channelCount = (int)_audioGraph.EncodingProperties.ChannelCount;
_fftProvider = new FftProvider(channelCount, FftSize.Fft2048);
_audioGraph.Start();
IsPlaying = true;
}
public string GetLevelsFromAudioFX(string audioType, string audioFile)
{
string audioFilename = Path.Combine(Executor.Current.ExpanderSharedFiles, audioType, audioFile);
string levelsFilename = Path.Combine(Executor.Current.ExpanderSharedFiles, audioType, audioFile + ".levels");
if (!File.Exists(levelsFilename))
{
using (ISampleSource source = CodecFactory.Instance.GetCodec(audioFilename).ToSampleSource())
{
var fftProvider = new FftProvider(source.WaveFormat.Channels, FftSize.Fft1024);
int millisecondsPerFrame = 1000 / 40;
long maxBufferLengthInSamples = source.GetRawElements(millisecondsPerFrame);
long bufferLength = Math.Min(source.Length, maxBufferLengthInSamples);
float[] buffer = new float[bufferLength];
int read = 0;
int totalSamplesRead = 0;
var fftData = new float[1024];
var list = new List <float>();
float highest = 0;
do
{
//determine how many samples to read
int samplesToRead = (int)Math.Min(source.Length - totalSamplesRead, buffer.Length);
read = source.Read(buffer, 0, samplesToRead);
if (read == 0)
{
break;
}
totalSamplesRead += read;
//add read data to the fftProvider
fftProvider.Add(buffer, read);
fftProvider.GetFftData(fftData);
float highestAmplitude = 0;
for (int i = 0; i < fftData.Length / 2; i++)
{
if (fftData[i] > highestAmplitude)
{
highestAmplitude = fftData[i];
}
}
list.Add(highestAmplitude);
if (highestAmplitude > highest)
{
highest = highestAmplitude;
}
} while (totalSamplesRead < source.Length);
if (highest > 0)
{
// Adjust to equalize
float adjustment = 1 / highest;
for (int i = 0; i < list.Count; i++)
{
list[i] *= adjustment;
}
}
using (var fs = File.Create(levelsFilename))
{
fs.Write(list.Select(x => (byte)(x * 255)).ToArray(), 0, list.Count);
}
}
}
return(levelsFilename);
}
/// <summary>
/// Entry point
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
// Validate cmd line args
if (args.Length != 1)
{
Console.WriteLine("Provide a valid music file location (mp3, wav, or m4a)");
return;
}
string filename = args[0];
if (!File.Exists(filename))
{
Console.Error.WriteLine("Could not find file: '{0}'", filename);
return;
}
// Read in audio file and initialize fft
IWaveSource waveSource;
ISampleSource sampleSource;
try
{
waveSource = CodecFactory.Instance.GetCodec(filename);
}
catch (NotSupportedException ex)
{
Console.Error.WriteLine("No supporting decoder for given file: '{0}'\n", filename);
Console.Error.WriteLine(ex.ToString());
return;
}
sampleSource = waveSource.ToSampleSource();
FftProvider fftProvider = new FftProvider(sampleSource.WaveFormat.Channels, FftSize.Fft1024);
List <Tuple <int, Complex[]> > fftResults = new List <Tuple <int, Complex[]> >();
int i = 0;
// Scrub through the audio 1024 samples at a time and perform fft on each chunk
while (sampleSource.Position < sampleSource.Length)
{
float[] samples = new float[1024];
sampleSource.Read(samples, 0, 1024);
fftProvider.Add(samples, samples.Count());
Complex[] result = new Complex[(int)fftProvider.FftSize];
if (fftProvider.GetFftData(result))
{
fftResults.Add(new Tuple <int, Complex[]>(i, result));
++i;
}
}
Console.WriteLine("FFT done");
// Stores the fundamental frequency and amplitude at each frame (1024 samples)
List <Tuple <double, double> > fundFreqs = new List <Tuple <double, double> >();
i = 0;
// For each fft output
foreach (var pair in fftResults)
{
// The output of the fft has a frequency domain and amplitude range.
// In this case, the index of the value represents frequency: index * ((sampleRate / 2) / (vals.Length / 2))
// The value at an index is the amplitude as a complex number. To normalize, calculate: sqrt(real^2 + imaginary^2), this can then be
// used to calculate dB level with dBspl equation (20 * log10(normal))
Complex[] vals = pair.Item2;
// Frequency buckets produced by fft. Size of each bucket depends on sample rate.
// 0 to N/2 of fft output is what we want, N/2 to N is garbage (negative frequencies)
int nyquistLength = vals.Length / 2;
// Nyquist rate is maximum possible reproducible sample frequency of a given sample rate
int nyquistRate = sampleSource.WaveFormat.SampleRate / 2;
// Normalize the amplitudes
double[] normals = new double[nyquistLength];
for (int j = 0; j < nyquistLength; ++j)
{
normals[j] = Math.Sqrt(Math.Pow(vals[j].Real, 2) + Math.Pow(vals[j].Imaginary, 2));
}
// Find the fundamental frequency and amplitude of that frequency
double fundFreq = 0;
double amplitude = double.NegativeInfinity; // in dB spl
int freqBucket = MaxIndex(normals);
if (freqBucket > 0)
{
fundFreq = freqBucket * (nyquistRate / nyquistLength);
}
if (fundFreq != 0)
{
amplitude = 20 * Math.Log10(normals[freqBucket]); // Convert to dB
}
fundFreqs.Add(new Tuple <double, double>(fundFreq, amplitude));
++i;
}
Console.WriteLine("Fundamental frequency analysis of each frame done");
Console.WriteLine("Writing results to csv (timestamp,frequency,amplitude)...");
FileStream outFileStream = null;
StreamWriter writer = null;
try
{
outFileStream = File.Create("out.csv");
writer = new StreamWriter(outFileStream);
for (int j = 0; j < fundFreqs.Count; ++j)
{
writer.WriteLine(string.Format("{0},{1},{2}", FrameIndexToTimestamp(j, sampleSource.WaveFormat.SampleRate, 1024), fundFreqs[j].Item1, fundFreqs[j].Item2));
}
writer.Close();
outFileStream.Close();
}
catch (Exception ex)
{
Console.Error.WriteLine("failed to write output:");
Console.Error.WriteLine(ex.ToString());
if (outFileStream != null)
{
outFileStream.Close();
}
if (writer != null)
{
writer.Close();
}
}
Console.WriteLine("Done");
Console.ReadKey(true);
}
public VisualizerCSCoreFft(int channels, int fftSize)
{
FftSize size = (FftSize)fftSize;
m_Fft = new FftProvider(channels, size);
}
