private static WaveFile MixWave(WaveFile wf1, WaveFile wf2, double fadeTime)
{
int FadeSamples = (int)(fadeTime * wf1.ByteRate / wf1.NumChannels); // number of samples affected by the crossfading
int FadeBytes = (int)(fadeTime * wf1.ByteRate); // number of affected bytes
WaveFile Result = new WaveFile(); // resulting Wave file
Result.FileSize = wf1.FileSize + wf2.DataSize - 2 * FadeBytes; // file size
Result.Format = "WAVE";
// copy information from the fmt chunk
Result.FmtChunkSize = wf1.FmtChunkSize;
Result.AudioFormat = wf1.AudioFormat;
Result.NumChannels = wf1.NumChannels;
Result.SampleRate = wf1.SampleRate;
Result.ByteRate = wf1.ByteRate;
Result.BlockAlign = wf1.BlockAlign;
Result.BitsPerSample = wf1.BitsPerSample;
Result.DataSize = wf1.DataSize + wf2.DataSize - 2 * FadeBytes; // new size of the data chunk
Result.Data = new int[wf1.NumChannels][]; // copy number of channels
int NumSamples = Result.DataSize / (Result.NumChannels * (Result.BitsPerSample / 8)); // number of samples in resulting file
// initialize data arrays for all samples and channels
for (int i = 0; i < Result.Data.Length; i++)
{
Result.Data[i] = new int[NumSamples];
}
int PosCounter = 0; // position of the current sample in the Wave file
// copy the samples from the first Wave file into the data field of the result file
for (int i = 0; i < wf1.Data[0].Length; i++)
{
// copy the current sample for all channels
for (int j = 0; j < wf1.NumChannels; j++)
{
// if the current sample is in the crossfading time, mix the amplitude value of the 1st file with the amplitude value of the 2nd file
if (i > wf1.Data[0].Length - FadeSamples)
{
Result.Data[j][PosCounter] = (int)(wf1.Data[j][i] * Factor(i - (wf1.Data[0].Length - FadeSamples), FadeSamples, 0) + wf2.Data[j][i - (wf1.Data[0].Length - FadeSamples)] * Factor(i - (wf1.Data[0].Length - FadeSamples), FadeSamples, 1));
//Result.Data[j][PosCounter] = (int)(wf1.Data[j][i] + wf2.Data[j][i - (wf1.Data[0].Length - FadeSamples)]);
}
else
Result.Data[j][PosCounter] = wf1.Data[j][i];
}
PosCounter++;
}
// copy the remaining samples
for (int i = FadeSamples; i < wf2.Data[0].Length; i++)
{
for (int j = 0; j < wf1.NumChannels; j++)
{
Result.Data[j][PosCounter] = wf2.Data[j][i];
}
PosCounter++;
}
return Result;
}
int SampleRate; // 6
#endregion Fields
#region Methods
public static void StoreMixWave(string path, WaveFile wf1, WaveFile wf2, double fadeTime)
{
WaveFile Mixed = MixWave(wf1, wf2, fadeTime); // Ergebnisdatei mischen
Mixed.StoreWave(path); // Ergebnisdatei auf Festplatte speichern
}
private void backgroundWorker4_DoWork(object sender, DoWorkEventArgs e)
{
while (bgw4_done < aantal_liedjes)
{
if (bgw3_done > 0)
{
if (bgw3_done > bgw4_done || bgw3_done == aantal_liedjes)
{
if (bgw4_done == 0)
{
System.IO.File.Copy(File.defaultDir + "\\faded\\" + (bgw4_done + 1) + ".wav", File.defaultDir + "\\total\\total.wav", true);
bgw4_done += 1;
}
else
{
if (System.IO.File.Exists(File.defaultDir + "\\faded\\" + (bgw4_done + 1).ToString() + ".wav"))
{
//MusicEditor.MixMp3(File.defaultDir + "\\total\\total.mp3", File.defaultDir + "\\faded\\" + (bgw4_done + 1) + ".mp3", (liedjes[bgw4_done - 1].FadeOut - new DateTime(2000, 1, 1)).TotalSeconds, File.defaultDir + "\\total\\total2.mp3");
WaveFile wf1 = new WaveFile();
wf1.LoadWave(File.defaultDir + "\\total\\total.wav");
WaveFile wf2 = new WaveFile();
wf2.LoadWave(File.defaultDir + "\\faded\\" + (bgw4_done + 1) + ".wav");
WaveFile.StoreMixWave(File.defaultDir + "\\total\\total2.wav", wf1, wf2, (liedjes[bgw4_done - 1].FadeOut - new DateTime(2000, 1, 1)).TotalSeconds);
System.IO.File.Delete(File.defaultDir + "\\total\\total.wav");
System.IO.File.Copy(File.defaultDir + "\\total\\total2.wav", File.defaultDir + "\\total\\total.wav");
System.IO.File.Delete(File.defaultDir + "\\total\\total2.wav");
bgw4_done += 1;
}
else
bgw4_done += 1;
}
backgroundWorker4.ReportProgress(1);
}
}
}
}