public byte[] adjustSpeed(byte[] data, double speedFactor)
{
MemoryStream msInput = new MemoryStream(data);
MemoryStream msOutput = new MemoryStream();
string tempfilename = $"{DateTime.Now.ToFileTimeUtc()}.wav";
using (var reader = new WaveFileReader(msInput))
{
var stupidIeeeNecessity = WaveFormat.CreateIeeeFloatWaveFormat(reader.WaveFormat.SampleRate, reader.WaveFormat.Channels);
using (var resampler = new MediaFoundationResampler(reader, stupidIeeeNecessity))
{
WaveFileWriter.CreateWaveFile(tempfilename, resampler);
}
}
using (var ieeeReader = new WaveFileReader(tempfilename))
{
var stwp = new SoundTouchWaveProvider(ieeeReader);
stwp.Tempo = speedFactor;
WaveFileWriter.WriteWavFileToStream(msOutput, stwp);
}
File.Delete(tempfilename);
return(msOutput.ToArray());
}
public static string finalLapMaker(string path, double factor)
{
int indexof = path.LastIndexOf('_');
string newpath = path.Substring(0, indexof) + "_f.wav";
if (Char.IsUpper(path[indexof + 1]))
{
newpath = path.Substring(0, indexof) + "_F.wav";
}
string temppath = path.Substring(0, indexof) + "_ieeetemp.wav";
using (var reader = new WaveFileReader(path))
{
var outFormat = WaveFormat.CreateIeeeFloatWaveFormat(reader.WaveFormat.SampleRate, reader.WaveFormat.Channels);
using (var resampler = new MediaFoundationResampler(reader, outFormat))
{
WaveFileWriter.CreateWaveFile(temppath, resampler);
}
}
using (var input = new WaveFileReader(temppath))
{
var stwp = new SoundTouchWaveProvider(input);
stwp.Tempo = factor;
WaveFileWriter.CreateWaveFile(newpath, stwp);
}
return(newpath);
}
public override PlaybackStates Play(Track track, WaveOutEvent player, string speed)
{
if (lastPlayback != track.FilePath)
{
player.Stop();
lastPlayback = track.FilePath;
}
if (player.PlaybackState == PlaybackState.Stopped)
{
var audioFile = new AudioFileReader(track.FilePath);
var output = new SoundTouchWaveProvider(audioFile);
if (speed == "0.5x")
{
output.RateChange = -50;
}
if (speed == "1.0x")
{
output.RateChange = 0;
}
if (speed == "1.5x")
{
output.RateChange = +50;
}
if (speed == "2.0x")
{
output.RateChange = +100;
}
player.Init(output);
}
player.Play();
return(new StatePaused());
}