/// <summary>
/// Constructor
/// <para>Initialises all fields.</para>
/// </summary>
/// <param name="song">Song that was serialised from the "SongName.xml".</param>
public UtilityHelper(Song song, ProgressBar progressBar)
{
//Init Buffer
AudioBuffer = new AudioBuffer();
ResultBuffer = new ResultBuffer();
//Init Classes
AudioRecording = new AudioRecording(AudioBuffer);
API_Helper = new API_Helper(AudioBuffer, ResultBuffer, ConfigFileHelper.ConfigApiAddress);
DataAnalyzer = new DataAnalyzer(ResultBuffer);
SongHelper.InitHelper(song);
SongHelper.ProgressMade += OnProgressMade;
_progressBar = progressBar;
cts = new CancellationTokenSource();
}
/// <summary>
/// Records audio data until the temporary buffer is full. The data is then added to the <see cref="AudioBuffer"/>/>
/// </summary>
/// <param name="ct">Token that throws an OperationCancelledException when the token state is set to cancel. Used to stop the task.</param>
/// <returns>Task, so the method can be run asynchronously</returns>
private async Task ReadDataToBuffer(CancellationToken ct)
{
ct.ThrowIfCancellationRequested();
SafeGetRecorder().StartRecording();
while (!ct.IsCancellationRequested)
{
//if (DevFlags.LoggingEnabled) Logger.RecordingLog("Looping");
await SafeGetRecorder().ReadAsync(InputBuffer, 0, InputBuffer.Length, 0);
RecordCount++;
AudioBuffer?.Add(new AudioData(InputBuffer, TimeHelper.GetElapsedTime()));
InputBuffer = new float[InputBuffer.Length];
if ((TimeHelper.GetElapsedTime() - 1000) > SongHelper.SongDuration)
{
Logger.RecordingLog("Duration of sog reached => stopping");
break;
}
}
SafeGetRecorder()?.Stop();
ct.ThrowIfCancellationRequested();
}
/// <summary>
/// Loop that reads the first entrance of the <see cref="AudioBuffer"/> and makes the API call.
/// The data that is recieved is pushed into the <see cref="ResultBuffer"/>./>
/// </summary>
/// <param name="ct">Token that throws an OperationCancelledException when the token state is set to cancel. Used to stop the task.</param>
/// <returns>Task, so the method can be run asynchronously.</returns>
private async Task ProcessingCycle(CancellationToken ct)
{
using (HttpClient httpClient = new HttpClient())
{
httpClient.Timeout = new TimeSpan(0, 0, 12);
while (true)
{
//if (DevFlags.LoggingEnabled) Logger.APILog("Looping");
ct.ThrowIfCancellationRequested();
if (AudioBuffer?.Peek() != null)
{
var data = AudioBuffer?.Get();
if (data != null)
{
EssentiaModel essentiaModel = new EssentiaModel(data.Data, data.Time);
var chordData = await DoAPICall(essentiaModel, httpClient, ct);
ResultBuffer.Add(chordData);
}
}
}
}
}
/// <summary>
/// Clean both buffers.
/// </summary>
private void EmptyBuffer()
{
AudioBuffer.Clean();
ResultBuffer.Clean();
}
/// <summary>
/// Frees the memory used by the <see cref="AudioRecorder"/> and empties the buffer.
/// </summary>
public void CleanUp()
{
SafeGetRecorder()?.Release();
AudioBuffer?.Clean();
}
