private void ProcessWaveform(Audio2Midi audio2midi, float[] waveform)
{
// Start the stopwatch
Stopwatch sw = Stopwatch.StartNew();
// stereo waveform
float[] monoSignal = BassProxy.GetMonoSignal(waveform, audioChannels, BassProxy.MonoSummingType.Mix);
//float[] monoSignal = ReadTestSignal();
// divide it into chunks of bufferSize
var chunks = monoSignal.Split(bufferSize);
int chunkLength = chunks.Count();
Console.WriteLine("Chunk count: {0}", chunkLength);
int count = 1;
foreach (var chunk in chunks)
{
Console.Write("Processing chunk: {0} \r", count);
var chunkArray = chunk.ToArray();
if (chunkArray.Length < bufferSize)
{
// zero pad the last chunk
Array.Resize <float>(ref chunkArray, bufferSize);
}
audio2midi.Process(chunkArray);
count++;
}
sw.Stop();
Console.Out.WriteLine("Audio2Midi Processed All: Time used: {0} ms", sw.Elapsed.TotalMilliseconds);
}
//[Test]
public void TestPianoRoll()
{
var audio2Midi = new Audio2Midi();
var bitmap = new Bitmap(600, 785, PixelFormat.Format32bppArgb);
audio2Midi.RenderPianoRoll(bitmap, 42, 784);
bitmap.Save("piano_roll.png");
}
void Audio2MidiInitialise(string inputFilepath)
{
// init audio system
var audioSystem = BassProxy.Instance;
//float[] wavData = BassProxy.ReadMonoFromFile(inputFilepath, (int) sampleRate, 1000, 0);
float[] wavData = BassProxy.ReadMonoFromFile(inputFilepath, (int)sampleRate);
// calculate number of frames and the duration
frames = MathUtils.RoundAwayFromZero((double)wavData.Length / (double)bufferSize);
audioLength = (double)wavData.Length / (double)sampleRate * 1000;
audio2midi = new Audio2Midi();
audio2midi.IsTrackLoaded = true;
audio2midi.Initialize(sampleRate, audioChannels, audioLength, frames);
ProcessWaveform(audio2midi, wavData);
}
