float[] Read(RIFFWaveReader reader, string instrument, double progressGap)
{
const long sampleBlock = 8192;
double progressSrc = task.Progress;
float[] read = new float[reader.Length * reader.ChannelCount];
for (long sample = 0; sample < read.LongLength;)
{
double progress = sample / (double)read.LongLength;
reader.ReadBlock(read, sample, Math.Min(sample += sampleBlock, read.LongLength));
task.UpdateProgressBar(progressSrc + progressGap * progress);
task.UpdateStatusLazy(string.Format("Reading {0} ({1})...", instrument, progress.ToString("0.00%")));
}
task.UpdateProgressBar(progressSrc + progressGap);
task.UpdateStatus(string.Format("Reading {0} (100%)...", instrument));
reader.Dispose();
return(read);
}
/// <summary>
/// Import an audio file for processing.
/// </summary>
void OpenFile(object _, RoutedEventArgs e)
{
OpenFileDialog dialog = new() {
Filter = dialogFilter
};
if (dialog.ShowDialog() == true)
{
try {
reader = new RIFFWaveReader(dialog.FileName);
reader.ReadHeader();
} catch (Exception ex) {
ShowError(ex.Message);
return;
}
loadedFile = dialog.FileName;
fileName.Text = Path.GetFileName(dialog.FileName);
SetStandardLayout(sourceChannels);
SetStandardLayout(targetChannels);
export.IsEnabled = true;
}
}
void Process()
{
task.UpdateProgressBar(0);
task.UpdateStatus("Reading headers...");
if (string.IsNullOrEmpty(path) || !Directory.Exists(path))
{
ProcessError("No valid path was selected.");
return;
}
string bassPath = Path.Combine(path, "bass.wav"), drumsPath = Path.Combine(path, "drums.wav"),
otherPath = Path.Combine(path, "other.wav"), pianoPath = Path.Combine(path, "piano.wav"),
vocalsPath = Path.Combine(path, "vocals.wav");
if (!File.Exists(bassPath) || !File.Exists(drumsPath) || !File.Exists(otherPath) || !File.Exists(vocalsPath))
{
ProcessError("Essence files not found. Please export with at least 4 parts.");
return;
}
RIFFWaveReader bassReader = null, drumsReader = null, otherReader = null, pianoReader = null, vocalsReader = null;
try {
bassReader = new RIFFWaveReader(new BinaryReader(File.Open(bassPath, FileMode.Open)));
bassReader.ReadHeader();
drumsReader = new RIFFWaveReader(new BinaryReader(File.Open(drumsPath, FileMode.Open)));
drumsReader.ReadHeader();
otherReader = new RIFFWaveReader(new BinaryReader(File.Open(otherPath, FileMode.Open)));
otherReader.ReadHeader();
vocalsReader = new RIFFWaveReader(new BinaryReader(File.Open(vocalsPath, FileMode.Open)));
vocalsReader.ReadHeader();
if (File.Exists(pianoPath))
{
pianoReader = new RIFFWaveReader(new BinaryReader(File.Open(pianoPath, FileMode.Open)));
pianoReader.ReadHeader();
}
} catch (IOException ex) {
if (bassReader != null)
{
bassReader.Dispose();
}
if (drumsReader != null)
{
drumsReader.Dispose();
}
if (pianoReader != null)
{
pianoReader.Dispose();
}
if (otherReader != null)
{
otherReader.Dispose();
}
if (vocalsReader != null)
{
vocalsReader.Dispose();
}
ProcessError(ex.Message);
return;
}
float[] finalMix = new float[bassReader.Length * 8];
float[] source = Read(bassReader, "bass", pianoReader == null ? .1 : .08);
Render(source, finalMix, GetMatrix(bass), GetLFE(bassLFE), "bass", pianoReader == null ? .1 : .08);
source = Read(drumsReader, "drums", pianoReader == null ? .1 : .08);
Render(source, finalMix, GetMatrix(drums), GetLFE(drumsLFE), "drums", pianoReader == null ? .1 : .08);
if (pianoReader != null)
{
source = Read(pianoReader, "piano", .08);
Render(source, finalMix, GetMatrix(piano), GetLFE(pianoLFE), "piano", .08);
}
source = Read(otherReader, "other", pianoReader == null ? .1 : .08);
Render(source, finalMix, GetMatrix(other), GetLFE(otherLFE), "other", pianoReader == null ? .1 : .08);
source = Read(vocalsReader, "vocals", pianoReader == null ? .1 : .08);
Render(source, finalMix, GetMatrix(vocals), GetLFE(vocalsLFE), "vocals", pianoReader == null ? .1 : .08);
task.UpdateProgressBar(.8);
task.UpdateStatus("Checking peaks...");
float peak = 1;
for (long i = 0; i < finalMix.LongLength; ++i)
{
if (peak < Math.Abs(finalMix[i]))
{
peak = Math.Abs(finalMix[i]);
}
}
if (peak != 1)
{
task.UpdateProgressBar(.85);
task.UpdateStatus("Normalizing...");
float mul = 1 / peak;
for (long i = 0; i < finalMix.LongLength; ++i)
{
finalMix[i] *= mul;
}
}
task.UpdateProgressBar(.9);
task.UpdateStatus("Exporting to render.wav (0.00%)...");
using (RIFFWaveWriter writer = new RIFFWaveWriter(new BinaryWriter(File.Open(Path.Combine(path, "render.wav"), FileMode.Create)),
8, bassReader.Length, bassReader.SampleRate, BitDepth.Int16)) {
writer.WriteHeader();
const long blockSize = 8192;
for (long sample = 0; sample < finalMix.LongLength;)
{
double progress = sample / (double)finalMix.LongLength;
writer.WriteBlock(finalMix, sample, Math.Min(sample += blockSize, finalMix.LongLength));
task.UpdateProgressBar(.9 + .1 * progress);
task.UpdateStatusLazy(string.Format("Exporting to render.wav ({0})...", progress.ToString("0.00%")));
}
}
task.UpdateProgressBar(1);
task.UpdateStatus("Finished!");
}
