示例#1
0
        public Task <bool> LoadDataAsync(CancellationToken token = new CancellationToken())
        {
            return(Task.Factory.StartNew(() =>
            {
                try
                {
                    if (string.IsNullOrEmpty(Filename))
                    {
                        _samples = null;
                        SampleCount = 0;
                        Max = 0;
                        Length = TimeSpan.Zero;
                        Loading = false;
                        IsEmpty = true;
                        return false;
                    }

                    IsEmpty = false;

                    Console.WriteLine($"- Reading {Filename}");
                    _samples = new SampleBuffer(Filename);
                    SampleRate = _samples.SampleRate;
                    Length = _samples.Length;

                    token.ThrowIfCancellationRequested();

                    _samples.Analyze();

                    // We don't care about ones where the samples are all equal
                    if (Math.Abs(_samples.Min - _samples.Max) < 0.0001)
                    {
                        Console.WriteLine($"- {Filename} is silent");
                        // So we skip steps here
                        _samples.Dispose();
                        _samples = null;
                        SampleCount = 0;
                        Max = 0;
                        Loading = false;
                        return false;
                    }

                    SampleCount = _samples.Count;

                    token.ThrowIfCancellationRequested();

                    Max = Math.Max(Math.Abs(_samples.Max), Math.Abs(_samples.Min));

                    Console.WriteLine($"- Peak sample amplitude for {Filename} is {Max}");

                    Loading = false;
                    return true;
                }
                catch (TaskCanceledException)
                {
                    // Blank out if cancelled
                    Max = 0;
                    SampleRate = 0;
                    Length = TimeSpan.Zero;
                    _samples?.Dispose();
                    _samples = null;
                    Loading = false;
                    return false;
                }
                catch (Exception ex)
                {
                    ErrorMessage = ex.ToString();
                    Max = 0;
                    SampleRate = 0;
                    Length = TimeSpan.Zero;
                    _samples?.Dispose();
                    _samples = null;
                    Loading = false;
                    return false;
                }
                finally
                {
                    Changed?.Invoke(this, false);
                }
            }, token));
        }
示例#2
0
        public Task <bool> LoadDataAsync(CancellationToken token = new CancellationToken())
        {
            return(Task.Factory.StartNew(() =>
            {
                try
                {
                    ErrorMessage = "";

                    if (string.IsNullOrEmpty(Filename))
                    {
                        _samples = null;
                        SampleCount = 0;
                        Max = 0;
                        Length = TimeSpan.Zero;
                        Loading = false;
                        IsEmpty = true;
                        return false;
                    }

                    IsEmpty = false;

                    Console.WriteLine($"- Reading {Filename}");
                    _samples = new SampleBuffer(Filename, Side, HighPassFilter);
                    SampleRate = _samples.SampleRate;
                    Length = _samples.Length;

                    token.ThrowIfCancellationRequested();

                    _samples.Analyze();

                    SampleCount = _samples.Count;

                    token.ThrowIfCancellationRequested();

                    Max = Math.Max(Math.Abs(_samples.Max), Math.Abs(_samples.Min));

                    Console.WriteLine($"- Peak sample amplitude for {Filename} is {Max}");

                    if (string.IsNullOrEmpty(ExternalTriggerFilename))
                    {
                        // Point at the same SampleBuffer
                        _samplesForTrigger = _samples;
                    }
                    else
                    {
                        _samplesForTrigger = new SampleBuffer(ExternalTriggerFilename, Side, HighPassFilter);
                    }

                    Loading = false;
                    return true;
                }
                catch (TaskCanceledException)
                {
                    // Blank out if cancelled
                    Max = 0;
                    SampleRate = 0;
                    Length = TimeSpan.Zero;
                    _samples?.Dispose();
                    _samples = null;
                    Loading = false;
                    return false;
                }
                catch (Exception ex)
                {
                    ErrorMessage = ex.ToString();
                    Max = 0;
                    SampleRate = 0;
                    Length = TimeSpan.Zero;
                    _samples?.Dispose();
                    _samples = null;
                    Loading = false;
                    return false;
                }
                finally
                {
                    Changed?.Invoke(this, false);
                }
            }, token));
        }