public void OpenFile(string path)
{
this.Stop();
if (this.ActiveStream != null)
{
this.SelectionBegin = TimeSpan.Zero;
this.SelectionEnd = TimeSpan.Zero;
this.ChannelPosition = 0;
}
this.StopAndCloseStream();
if (File.Exists(path))
{
try
{
this.waveOutDevice = new WaveOut
{
DesiredLatency = 100
};
// ActiveStream = new Mp3FileReader(path);
this.ActiveStream = new WaveFileReader(path);
this.inputStream = new WaveChannel32(this.ActiveStream);
this.sampleAggregator = new SampleAggregator(this.fftDataSize);
this.inputStream.Sample += this.inputStream_Sample;
this.waveOutDevice.Init(this.inputStream);
this.ChannelLength = this.inputStream.TotalTime.TotalSeconds;
this.GenerateWaveformData(path);
this.CanPlay = true;
}
catch
{
this.ActiveStream = null;
this.CanPlay = false;
}
}
}
private void waveformGenerateWorker_DoWork(object sender, DoWorkEventArgs e)
{
var waveformParams = e.Argument as WaveformGenerationParams;
//Mp3FileReader waveformMp3Stream;
WaveFileReader waveformWaveStream;
WaveChannel32 waveformInputStream;
try
{
//waveformMp3Stream = new Mp3FileReader(waveformParams.Path);
//waveformInputStream = new WaveChannel32(waveformMp3Stream);
waveformWaveStream = new WaveFileReader(waveformParams.Path);
waveformInputStream = new WaveChannel32(waveformWaveStream);
}
catch (Exception) {
return; //why that object is set to null ref...?!
}
waveformInputStream.Sample += this.waveStream_Sample;
var frameLength = this.fftDataSize;
var frameCount = (int)(waveformInputStream.Length / (double)frameLength);
var waveformLength = frameCount * 2;
var readBuffer = new byte[frameLength];
this.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(this.waveformAggregator.LeftMaxVolume);
waveformData.Add(this.waveformAggregator.RightMaxVolume);
if (this.waveformAggregator.LeftMaxVolume > maxLeftPointLevel)
{
maxLeftPointLevel = this.waveformAggregator.LeftMaxVolume;
}
if (this.waveformAggregator.RightMaxVolume > maxRightPointLevel)
{
maxRightPointLevel = this.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();
DispatcherHelper.UIDispatcher.Invoke(() => { this.WaveformData = clonedData; });
}
if (this.waveformGenerateWorker.CancellationPending)
{
e.Cancel = true;
break;
}
readCount++;
}
var finalClonedData = (float[])waveformCompressedPoints.Clone();
DispatcherHelper.UIDispatcher.Invoke(() =>
{
this.fullLevelData = waveformData.ToArray();
this.WaveformData = finalClonedData;
});
waveformInputStream.Close();
waveformInputStream.Dispose();
waveformInputStream = null;
//waveformMp3Stream.Close();
//waveformMp3Stream.Dispose();
//waveformMp3Stream = null;
waveformWaveStream.Close();
waveformWaveStream.Dispose();
waveformWaveStream = null;
}
