/// <summary>
/// The pitch was detected - add the record
/// </summary>
/// <param name="pitch"></param>
private void AddPitchRecord(float pitch)
{
var midiNote = 0;
var midiCents = 0;
MusicalTemperament.PitchToMidiNote(pitch, out midiNote, out midiCents);
var record = new PitchRecord();
record.RecordIndex = m_curPitchIndex;
record.Pitch = pitch;
record.MidiNote = midiNote;
record.MidiCents = midiCents;
m_curPitchRecord = record;
if (m_recordPitchRecords)
{
if (m_pitchRecordHistorySize > 0 && m_pitchRecords.Count >= m_pitchRecordHistorySize)
{
m_pitchRecords.RemoveAt(0);
}
m_pitchRecords.Add(record);
}
if (PitchDetected != null)
{
PitchDetected(this, record);
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="fSampleRate"></param>
/// <param name="minFreq"></param>
/// <param name="maxFreq"></param>
/// <param name="fFreqStep"></param>
public PitchDsp(double sampleRate, float minPitch, float maxPitch, float detectLevelThreshold)
{
m_sampleRate = sampleRate;
m_minPitch = minPitch;
m_maxPitch = maxPitch;
m_detectLevelThreshold = detectLevelThreshold;
m_minNote = (int)(MusicalTemperament.PitchToMidiNote(m_minPitch) + 0.5f) + 2;
m_maxNote = (int)(MusicalTemperament.PitchToMidiNote(m_maxPitch) + 0.5f) - 2;
m_blockLen44 = (int)(m_sampleRate / m_minPitch + 0.5f);
m_blockLen34 = (m_blockLen44 * 3) / 4;
m_blockLen24 = m_blockLen44 / 2;
m_blockLen14 = m_blockLen44 / 4;
m_numCourseSteps = (int)((Math.Log((double)m_maxPitch / (double)m_minPitch) / Math.Log(2.0)) * kCourseOctaveSteps + 0.5) + 3;
m_pCourseFreqOffset = new float[m_numCourseSteps + 10000];
m_pCourseFreq = new float[m_numCourseSteps + 10000];
m_detectCurve = new float[m_numCourseSteps];
var freqStep = 1.0 / Math.Pow(2.0, 1.0 / kCourseOctaveSteps);
var curFreq = m_maxPitch / freqStep;
// frequency is stored from high to low
for (int idx = 0; idx < m_numCourseSteps; idx++)
{
m_pCourseFreq[idx] = (float)curFreq;
m_pCourseFreqOffset[idx] = (float)(m_sampleRate / curFreq);
curFreq *= freqStep;
}
for (int idx = 0; idx < kScanHiSize; idx++)
{
m_scanHiOffset[idx] = (float)Math.Pow(kScanHiFreqStep, (kScanHiSize / 2) - idx);
}
}
public MusicXmlDecoder(string fileName)
: base()
{
scorepartwise score;
using (var reader = new StreamReader(fileName))
{
score = (scorepartwise)_xmlSerializer.Deserialize(reader);
}
Events = new List <MusicalEvent>();
double divisions = 1;
Beats = 4;
BeatType = 4;
Tempo = 120;
int currentEventNumber = 0;
foreach (var meause in score.part[0].measure)
{
foreach (var item in meause.Items)
{
var attributes = item as attributes;
if (attributes != null)
{
if (attributes.divisions != 0)
{
divisions = (double)(attributes.divisions);
}
if (attributes.time != null)
{
Beats = Convert.ToInt32(attributes.time[0].Items[0]);
}
if (attributes.time != null)
{
BeatType = Convert.ToInt32(attributes.time[0].Items[1]);
}
}
var direction = item as direction;
if (direction != null)
{
var sound = direction.sound;
if (sound != null && sound.tempo != 0.0m)
{
Tempo = (int)sound.tempo;
}
}
var note = item as note;
if (note != null && (note.staff == null || int.Parse(note.staff) == 1))
{
var pitch = note.Items[0] as pitch;
if (pitch != null)
{
Events.Add(new MusicalEvent
{
Number = currentEventNumber++,
MidiNote = MusicalTemperament.NoteNameToMidiNote(pitch.step.ToString(), (int)pitch.alter, int.Parse(pitch.octave)),
Duration = Convert.ToDouble(note.Items[1]) / divisions
});
}
else
{
var rest = note.Items[0] as rest;
if (rest != null)
{
Events.Add(new MusicalEvent
{
Number = currentEventNumber++,
MidiNote = -1,
Duration = Convert.ToDouble(note.Items[1]) / divisions
});
}
}
}
}
}
}