static int i, j; //, k;
#endregion Fields
#region Methods
public static List<IdolWaveNote> GetWaveNotes(IdolWave _wave)
{
List<IdolWaveNote> result = new List<IdolWaveNote>();
/******/
//GetNotes(0, _wave.Data.Length - 1, _wave, result);
#region parallel
int chunk = _wave.Data.Length / bufferSize;
List<IdolWaveNote> result1 = new List<IdolWaveNote>();
List<IdolWaveNote> result2 = new List<IdolWaveNote>();
List<IdolWaveNote> result3 = new List<IdolWaveNote>();
List<IdolWaveNote> result4 = new List<IdolWaveNote>();
Parallel.Do(delegate()
{
GetNotes(0, chunk / 2 * bufferSize - 1, _wave, result1);
}
,
delegate()
{
GetNotes(chunk / 2 * bufferSize, _wave.Data.Length - 1, _wave, result2);
}
);
//Parallel.Do(delegate()
//{
// GetNotes(0, chunk / 4 * bufferSize - 1, _wave, result1);
//},
//delegate()
//{
// GetNotes(chunk / 4 * bufferSize, 2 * chunk / 4 * bufferSize - 1, _wave, result2);
//}
//,
//delegate()
//{
// GetNotes(2 * chunk / 4 * bufferSize, 3 * chunk / 4 * bufferSize - 1, _wave, result3);
//},
//delegate()
//{
// GetNotes(3 * chunk / 4 * bufferSize, _wave.Data.Length - 1, _wave, result4);
//}
//);
result.AddRange(result1);
result.AddRange(result2);
//result.AddRange(result3);
//result.AddRange(result4);
#endregion
/******/
return result;
}
public static IdolWave LoadWaveFile(byte[] waveBytes)
{
IdolWave result = new IdolWave();
ParseWave(result, waveBytes);
return result;
}
private static void ParseWave(IdolWave result, byte[] waveBytes)
{
i = 0;
//read ChunkID
result.ChunkID = BitConverter.ToString(waveBytes, i, 4);
i += 4;
//read ChunkSize
if (BitConverter.IsLittleEndian)
{
result.ChunkSize = BitConverter.ToInt32(waveBytes, i);
}
else
{
result.ChunkSize = swapByteOrder(BitConverter.ToInt32(waveBytes, i));
}
i += 4;
//read Format
result.Format = BitConverter.ToString(waveBytes, i, 4);
i += 4;
//read Subchunk1ID
result.Subchunk1ID = BitConverter.ToString(waveBytes, i, 4);
i += 4;
//read Subchunk1Size
if (BitConverter.IsLittleEndian)
{
result.Subchunk1Size = BitConverter.ToInt32(waveBytes, i);
}
else
{
result.Subchunk1Size = swapByteOrder(BitConverter.ToInt32(waveBytes, i));
}
i += 4;
//read AudioFormat
if (BitConverter.IsLittleEndian)
{
result.AudioFormat = BitConverter.ToUInt16(waveBytes, i);
}
else
{
result.AudioFormat = swapByteOrder(BitConverter.ToUInt16(waveBytes, i));
}
i += 2;
//read NumChannels
if (BitConverter.IsLittleEndian)
{
result.NumChannels = BitConverter.ToUInt16(waveBytes, i);
}
else
{
result.NumChannels = swapByteOrder(BitConverter.ToUInt16(waveBytes, i));
}
i += 2;
//read SampleRate
if (BitConverter.IsLittleEndian)
{
result.SampleRate = BitConverter.ToInt32(waveBytes, i);
}
else
{
result.SampleRate = swapByteOrder(BitConverter.ToInt32(waveBytes, i));
}
i += 4;
//read ByteRate
if (BitConverter.IsLittleEndian)
{
result.ByteRate = BitConverter.ToInt32(waveBytes, i);
}
else
{
result.ByteRate = swapByteOrder(BitConverter.ToInt32(waveBytes, i));
}
i += 4;
//read BlockAlign
if (BitConverter.IsLittleEndian)
{
result.BlockAlign = BitConverter.ToUInt16(waveBytes, i);
}
else
{
result.BlockAlign = swapByteOrder(BitConverter.ToUInt16(waveBytes, i));
}
i += 2;
//read BitsPerSample
if (BitConverter.IsLittleEndian)
{
result.BitsPerSample = BitConverter.ToUInt16(waveBytes, i);
}
else
{
result.BitsPerSample = swapByteOrder(BitConverter.ToUInt16(waveBytes, i));
}
i += 2;
//read Subchunk2ID
result.Subchunk2ID = BitConverter.ToString(waveBytes, i, 4);
i += 4;
//read Subchunk2Size
if (BitConverter.IsLittleEndian)
{
result.Subchunk2Size = BitConverter.ToInt32(waveBytes, i);
}
else
{
result.Subchunk2Size = swapByteOrder(BitConverter.ToInt32(waveBytes, i));
}
i += 4;
//read data
//result.Data = new byte[result.Subchunk2Size];
result.Data = new byte[waveBytes.Length - i];
j = 0;
while (i < waveBytes.Length - 1)
{
result.Data[j] = waveBytes[i];
i++;
j++;
}
}
private static void GetNotes(int startIdx, int endIdx, IdolWave _wave, List<IdolWaveNote> result)
{
IdolWaveNote waveNote;
//short[] waveShortBuffer = new short[bufferSize];
//float timeLength = 0.4f;
//short[] waveShortBuffer = new short[(int)(_wave.ByteRate / 2 * timeLength)];
//byte[] waveByteBuffer = new byte[(int)(_wave.ByteRate / 2 * timeLength)];
byte[] waveByteBuffer = new byte[bufferSize];
int waveIdx = startIdx;
int bufferIdx = 0;
AudioFrame audioFrame = new AudioFrame(false);
double MinFreq = 80;
double MaxFreq = 800;
int defaultIdx = -99;
int batchNo = 0;
while (waveIdx < endIdx)
{
batchNo++;
bufferIdx = 0;
/************************************************/
//while (waveIdx < endIdx &&
// bufferIdx < waveShortBuffer.Length)
//{
// waveShortBuffer[bufferIdx] = (Int16)swapByteOrder(BitConverter.ToUInt16(_wave.Data, waveIdx));
// waveIdx += _wave.NumChannels;
// bufferIdx++;
//}
//waveNote = IdolSoundAnalyzer.ProcessData(waveShortBuffer, _wave.SampleRate);
//IdolSoundAnalyzer.FindClosestNote((int)Math.Round(waveNote.freq), out closestFreq, out waveNote.NoteIdx, out waveNote.NoteName);
/************************************************/
while (waveIdx < endIdx &&
bufferIdx < waveByteBuffer.Length)
{
waveByteBuffer[bufferIdx] = _wave.Data[waveIdx];
waveIdx ++;
bufferIdx++;
}
audioFrame.ProcessMono(ref waveByteBuffer);
int fftBufferLength = audioFrame._fftLeft.Length;
int minSpectr = (int)(MinFreq * (fftBufferLength * 2) / _wave.SampleRate) + 1;
int index = minSpectr;
double max = audioFrame._fftLeft[index];
int usefullMaxSpectr = Math.Min((fftBufferLength * 2),
(int)(MaxFreq * (fftBufferLength * 2) / _wave.SampleRate) + 1);
List<Peak> peakList = new List<Peak>();
double current = max;
double last = max;
double last2 = max;
for (int i = index; i < usefullMaxSpectr; i++)
{
last2 = last;
last = current;
current = audioFrame._fftLeft[i];
if (last > 51)
{
if (last > last2 && last > current)
{
Peak peak = new Peak();
peak.Index = i - 1;
peak.Freq = _wave.SampleRate * (i - 1) / (audioFrame._fftLeft.Length * 2);
peak.Amp = audioFrame._fftLeft[i - 1];
peakList.Add(peak);
}
}
if (max < audioFrame._fftLeft[i])
{
max = audioFrame._fftLeft[i]; index = i;
}
}
double freq = 0;
if (peakList.Count > 0)
{
int i = 0;
bool found = false;
while (i < peakList.Count && !found)
{
if (peakList[i].Amp >= 58)
{
index = peakList[i].Index;
found = true;
}
else i++;
}
if (!found)
{
index = peakList[0].Index;
}
else
{
for (int j = 0; j < i; j++)
{
double ratio = peakList[i].Freq / peakList[j].Freq;
if (ratio >= 1 && (ratio % 1.0f < 0.1f || ratio % 1.0f > 0.9f))
{
index = peakList[j].Index;
if (peakList[j].Freq == 93)
{
peakList[j].Freq *= 1;
}
break;
}
}
}
}
freq = _wave.SampleRate * index / (audioFrame._fftLeft.Length * 2);
if (freq < MinFreq) freq = 0;
waveNote = new IdolWaveNote();
waveNote.freq = freq;
waveNote.max = audioFrame._fftLeft[index];
IdolSoundAnalyzer.FindClosestNote((int)Math.Round(waveNote.freq), out closestFreq, out waveNote.NoteIdx, out waveNote.NoteName);
/************************************************/
result.Add(waveNote);
}
}