private static void TranscodeVirtual([NotNull] string source, [NotNull] string destination)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (destination == null)
{
throw new ArgumentNullException(nameof(destination));
}
using (var helper1 = new SfVirtualStreamHelper(File.OpenRead(source)))
using (var helper2 = new SfVirtualStreamHelper(File.Create(destination)))
using (var input = SndFile.OpenRead(helper1.Virtual))
using (var output = SndFile.OpenWrite(helper2.Virtual, SfFormat.DefaultWav))
{
if (input == null)
{
throw new InvalidOperationException(SndFile.GetErrorMessage());
}
if (output == null)
{
throw new InvalidOperationException(SndFile.GetErrorMessage());
}
TranscodeInternal(input, output);
}
}
private static int Main(string[] args)
{
var result = Parser.Default.ParseArguments <Options>(args);
if (result.Errors.Any()) // prints usage
{
Console.WriteLine("Return codes:");
Console.WriteLine(" Help : -2");
Console.WriteLine(" Error : -1");
foreach (var k in Enum.GetValues(typeof(Key)).Cast <Key>())
{
Console.WriteLine($" {k,-12} : {(int) k}");
}
Console.WriteLine();
Console.WriteLine("Credits :");
Console.WriteLine(" https://github.com/ibsh/libKeyFinder");
Console.WriteLine(" https://github.com/aybe/libKeyFinder.NET");
Console.WriteLine(" https://github.com/erikd/libsndfile");
return(-2);
}
var options = result.Value;
var path = options.Path;
if (!File.Exists(path))
{
Console.WriteLine("File not found");
return(-1);
}
var sf = SndFile.OpenRead(path);
if (sf == null)
{
Console.WriteLine($"File couldn't be opened: '{SndFile.GetErrorMessage()}'.");
return(-1);
}
var format = sf.Format;
var frames = Math.Min(Options.DefaultBlockSize, options.BlockSize);
var samples = frames * format.Channels;
var buffer = new double[samples];
var totalFrames = 0L;
var totalPercent = 0;
var kd = new KeyDetector(format.SampleRate, format.Channels, samples);
while (true)
{
var readFrames = sf.ReadFrames(buffer, frames);
if (readFrames <= 0)
{
break;
}
var readSamples = readFrames * format.Channels;
for (var i = 0; i < readSamples; i++)
{
kd.SetSample((uint)i, buffer[i]);
}
for (var i = readSamples; i < samples; i++)
{
kd.SetSample((uint)i, 0.0d);
}
kd.ProgressiveChromagram();
totalFrames += readFrames;
var percent = (int)((double)totalFrames / sf.Frames * 100.0d);
if (percent <= totalPercent)
{
continue;
}
var key1 = kd.KeyOfChromagram();
Console.WriteLine($"{percent,6}% : {key1,-12} ({(int) key1})");
totalPercent = percent;
}
kd.FinalChromagram();
var key2 = kd.KeyOfChromagram();
kd.Dispose();
sf.Dispose();
Console.WriteLine();
Console.WriteLine($"Finale : {key2,-12} ({(int) key2})");
return((int)key2);
}
/// <summary>
/// Generate a new buffer by reading in an audio file
/// </summary>
/// <param name="fileName"></param>
private void GenBuffer(string fileName)
{
// create a new file descriptor
var wavfile = SndFile.OpenRead(fileName);
if (wavfile.GetError() != SfError.NoError)
{
return;
}
// size of the wav file
long bufferSize = wavfile.Format.Channels * wavfile.Frames;
// read the sound data
short[] soundData = new short[bufferSize];
wavfile.ReadFrames(soundData, wavfile.Frames);
// type of the wave file
ALFormat subtype = 0;
if (wavfile.Format.Subtype == SfFormatSubtype.PCM_16)
{
if (wavfile.Format.Channels == 1)
{
subtype = ALFormat.Mono16;
}
else if (wavfile.Format.Channels == 2)
{
subtype = ALFormat.Stereo16;
}
}
else if (wavfile.Format.Subtype == SfFormatSubtype.PCM_S8)
{
if (wavfile.Format.Channels == 1)
{
subtype = ALFormat.Mono8;
}
else if (wavfile.Format.Channels == 2)
{
subtype = ALFormat.Stereo8;
}
}
// frequency of the sound file
int freq = wavfile.Format.SampleRate;
// dispose file descriptor
wavfile.Close();
wavfile.Dispose();
// unsupported file type, so return
if (subtype == 0)
{
return;
}
// create a openAL buffer
int buffer = AL.GenBuffer();
AL.BufferData(buffer, subtype, soundData, (int)bufferSize * sizeof(short), freq);
// assign it
_audioBuffers[fileName] = buffer;
}