public void OpenFile(string path)
{
Stop();
if (ActiveStream != null)
{
SelectionBegin = TimeSpan.Zero;
SelectionEnd = TimeSpan.Zero;
ChannelPosition = 0;
}
StopAndCloseStream();
if (System.IO.File.Exists(path))
{
try
{
waveOutDevice = new WasapiOut(new MMDeviceEnumerator().GetDefaultAudioEndpoint(DataFlow.Render, Role.Multimedia), AudioClientShareMode.Shared, false, 2);
ActiveStream = new Mp3FileReader(path);
inputStream = new WaveChannel32(ActiveStream);
sampleAggregator = new SampleAggregator(fftDataSize);
inputStream.Sample += inputStream_Sample;
waveOutDevice.Init(inputStream);
ChannelLength = inputStream.TotalTime.TotalSeconds;
FileTag = File.Create(path);
GenerateWaveformData(path);
CanPlay = true;
}
catch (Exception ex)
{
MessageBox.Show($"{ex.GetType()}: {ex.Message}");
ActiveStream = null;
CanPlay = false;
}
}
}
private void waveformGenerateWorker_DoWork(object sender, DoWorkEventArgs e)
{
var waveformParams = e.Argument as WaveformGenerationParams;
var waveformMp3Stream = new Mp3FileReader(waveformParams.Path);
var waveformInputStream = new WaveChannel32(waveformMp3Stream);
waveformInputStream.Sample += waveStream_Sample;
var frameLength = fftDataSize;
var frameCount = (int)(waveformInputStream.Length / (double)frameLength);
var waveformLength = frameCount * 2;
var readBuffer = new byte[frameLength];
waveformAggregator = new SampleAggregator(frameLength);
var maxLeftPointLevel = float.MinValue;
var maxRightPointLevel = float.MinValue;
var currentPointIndex = 0;
var waveformCompressedPoints = new float[waveformParams.Points];
var waveformData = new List <float>();
var waveMaxPointIndexes = new List <int>();
for (var i = 1; i <= waveformParams.Points; i++)
{
waveMaxPointIndexes.Add((int)Math.Round(waveformLength * (i / (double)waveformParams.Points), 0));
}
var readCount = 0;
while (currentPointIndex * 2 < waveformParams.Points)
{
waveformInputStream.Read(readBuffer, 0, readBuffer.Length);
waveformData.Add(waveformAggregator.LeftMaxVolume);
waveformData.Add(waveformAggregator.RightMaxVolume);
if (waveformAggregator.LeftMaxVolume > maxLeftPointLevel)
{
maxLeftPointLevel = waveformAggregator.LeftMaxVolume;
}
if (waveformAggregator.RightMaxVolume > maxRightPointLevel)
{
maxRightPointLevel = waveformAggregator.RightMaxVolume;
}
if (readCount > waveMaxPointIndexes[currentPointIndex])
{
waveformCompressedPoints[currentPointIndex * 2] = maxLeftPointLevel;
waveformCompressedPoints[currentPointIndex * 2 + 1] = maxRightPointLevel;
maxLeftPointLevel = float.MinValue;
maxRightPointLevel = float.MinValue;
currentPointIndex++;
}
if (readCount % 3000 == 0)
{
var clonedData = (float[])waveformCompressedPoints.Clone();
Application.Current.Dispatcher.Invoke(() => { WaveformData = clonedData; });
}
if (waveformGenerateWorker.CancellationPending)
{
e.Cancel = true;
break;
}
readCount++;
}
var finalClonedData = (float[])waveformCompressedPoints.Clone();
Application.Current.Dispatcher.Invoke(() =>
{
fullLevelData = waveformData.ToArray();
WaveformData = finalClonedData;
});
waveformInputStream.Close();
waveformInputStream.Dispose();
waveformInputStream = null;
waveformMp3Stream.Close();
waveformMp3Stream.Dispose();
waveformMp3Stream = null;
}