Add essentiamath

src/algorithms/tonal/pitchyinprobabilities.cpp

@@ -321,7 +321,7 @@ void PitchYinProbabilities::compute() {
   bool isLowAmplitude = (RMS < _lowAmp);
 
   for (size_t iCandidate = 0; iCandidate < _freq.size(); ++iCandidate) {
-    Real pitchCents = hz2cents(_freq[iCandidate]);
+    Real pitchCents = hz2midi(_freq[iCandidate]);
     _freq[iCandidate] = pitchCents;
     if (isLowAmplitude) {
       // lower the probabilities of the frequencies by calculating the weighted sum

src/essentia/essentiamath.h

@@ -738,8 +738,88 @@ inline Real hz2hz(Real hz){
   return hz;
 }
 
-inline Real hz2cents(Real hz) {
-  return 12 * std::log(hz/440)/std::log(2.) + 69;
+inline Real cents2hz(Real frequencyB, Real cents) {
+  return frequencyB * powf(2.0, cents / 1200.0);
+}
+
+inline Real hz2cents(Real frequencyA, Real frequencyB) {
+  return 1200 * log2(frequencyA / frequencyB);
+}
+
+inline int hz2midi(Real hz, Real tuningFrequency) {
+  return 69 + (int) round(log2(hz / tuningFrequency) * 12);
+}
+
+inline Real midi2hz(int midiNoteNumber, Real tuningFrequency) {
+  return tuningFrequency * powf(2, (midiNoteNumber - 69) / 12.0);
+}
+
+inline std::string note2root(std::string note) {
+    return note.substr(0, note.size()-1);
+}
+
+inline int note2octave(std::string note) {
+    char octaveChar = note.back();
+    return octaveChar - '0';
+}
+
+inline std::string midi2note(int midiNoteNumber) {
+  const std::vector<std::string> ALL_NOTES { "A", "A#", "B", "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#" };
+  int nNotes = ALL_NOTES.size();
+  int CIdx = 3;
+  int diffCIdx = nNotes - CIdx;
+  int noteIdx = midiNoteNumber - 69;
+  int idx = abs(noteIdx) % nNotes;
+  int octave = (CIdx + 1) + floor((noteIdx + diffCIdx) / nNotes);
+  if (noteIdx < 0) {
+    idx = abs(idx - nNotes) % nNotes;
+  }
+  std::string closest_note = ALL_NOTES[idx] + std::to_string(octave);
+  return closest_note;
+}
+
+inline int note2midi(std::string note) {
+  const std::vector<std::string> ALL_NOTES { "A", "A#", "B", "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#" };
+  int octave = note2octave(note);
+  std::string root = note2root(note);
+  int nNotes = ALL_NOTES.size();
+  int CIdx = 3;
+
+  int noteIdx = floor((octave - (CIdx + 1)) * nNotes);
+  int idx = 0;
+  for (int i = 0; i < nNotes; i++) {
+      if (ALL_NOTES[i] == root) {
+        idx = i;
+        if (idx >= CIdx) {
+          idx = idx - nNotes;
+        }
+        i = nNotes;
+      }
+  }
+  int midiNote = noteIdx + 69 + idx;
+  return midiNote;
+}
+
+inline std::string hz2note(Real hz, Real tuningFrequency) {
+    int midiNoteNumber = hz2midi(hz, tuningFrequency);
+    return midi2note(midiNoteNumber);
+}
+
+inline int note2hz(std::string note, Real tuningFrequency) {
+    int midiNoteNumber = note2midi(note);
+    return midi2hz(midiNoteNumber, tuningFrequency);
+}
+
+inline int db2velocity (Real decibels, Real hearingThreshold) {
+  int velocity = 0;
+  if (decibels > hearingThreshold) {
+    velocity = (int)((hearingThreshold - decibels) * 127 / hearingThreshold);  // decibels should be negative
+  }
+  return velocity;
+}
+
+inline Real velocity2db(int velocity, Real hearingThreshold) {
+  return -(hearingThreshold * velocity / 127 -hearingThreshold);
 }
 
 inline int argmin(const std::vector<Real>& input) {

src/python/essentia/utils.py

@@ -63,6 +63,50 @@ def mel2hz(arg):
 def hz2mel(arg):
     return _essentia.hz2mel( _c.convertData(arg, _c.Edt.REAL) )
 
+def midi2hz(arg1, arg2=440.0):
+    return _essentia.midi2hz( _c.convertData(arg1, _c.Edt.INTEGER),
+                              _c.convertData(arg2, _c.Edt.REAL) )
+
+def hz2midi(arg1, arg2=440.0):
+    return _essentia.hz2midi( _c.convertData(arg1, _c.Edt.REAL),
+                              _c.convertData(arg2, _c.Edt.REAL) )
+
+def cents2hz(arg1, arg2):
+    return _essentia.cents2hz(_c.convertData(arg1, _c.Edt.REAL),
+                              _c.convertData(arg2, _c.Edt.REAL) )
+
+def hz2cents(arg1, arg2):
+    return _essentia.hz2cents(_c.convertData(arg1, _c.Edt.REAL),
+                              _c.convertData(arg2, _c.Edt.REAL) )
+
+def midi2note(arg):
+    return _essentia.midi2note( _c.convertData(arg, _c.Edt.INTEGER) )
+
+def note2midi(arg):
+    return _essentia.note2midi( _c.convertData(arg, _c.Edt.STRING) )
+
+def note2root(arg):
+    return _essentia.note2root( _c.convertData(arg, _c.Edt.STRING) )
+
+def note2octave(arg):
+    return _essentia.note2octave( _c.convertData(arg, _c.Edt.STRING) )
+
+def hz2note(arg1, arg2=440.0):
+    return _essentia.hz2note( _c.convertData(arg1, _c.Edt.REAL),
+                              _c.convertData(arg2, _c.Edt.REAL) )
+
+def note2hz(arg1, arg2=440.0):
+    return _essentia.note2hz( _c.convertData(arg1, _c.Edt.STRING),
+                              _c.convertData(arg2, _c.Edt.REAL) )
+
+def velocity2db(arg1, arg2=-96):
+    return _essentia.velocity2db( _c.convertData(arg1, _c.Edt.INTEGER),
+                                  _c.convertData(arg2, _c.Edt.REAL) )
+
+def db2velocity(arg1, arg2=-96):
+    return _essentia.db2velocity( _c.convertData(arg1, _c.Edt.REAL),
+                                  _c.convertData(arg2, _c.Edt.REAL) )
+
 def equivalentKey(arg):
     return _essentia.equivalentKey( _c.convertData(arg, _c.Edt.STRING) )
 
@@ -86,6 +130,12 @@ def derivative(array):
             'amp2db', 'db2amp',
             'bark2hz', 'hz2bark',
             'mel2hz', 'hz2mel',
+            'midi2hz', 'hz2midi',
+	    'cents2hz', 'hz2cents',
+	    'note2root', 'note2octave',
+            'midi2note', 'note2midi',
+            'hz2note', 'note2hz',
+            'velocity2db', 'db2velocity',
             'postProcessTicks',
             'normalize', 'derivative',
             'equivalentKey', 'lin2log']

src/python/globalfuncs.cpp

@@ -389,6 +389,167 @@ hzToMel(PyObject* notUsed, PyObject* arg) {
   return PyFloat_FromDouble( double(mel) );
 }
 
+static PyObject*
+midiToHz(PyObject* notUsed, PyObject* args) {
+  // parse args to get Source alg, name and source alg and source name
+  vector<PyObject*> argsV = unpack(args);
+  if  (argsV.size() != 2 ||
+    (!PyLong_Check(argsV[0]) || !PyFloat_Check(argsV[1]))) {
+    PyErr_SetString(PyExc_ValueError, "expecting arguments (int midiNoteNumber, Real tuningFrequency)");
+    return NULL;
+  }
+  Real hz = midi2hz( long( PyLong_AsLong(argsV[0]) ),  Real( PyFloat_AS_DOUBLE(argsV[1])) );
+  return PyFloat_FromDouble( double(hz) );
+}
+
+static PyObject*
+hzToMidi(PyObject* notUsed, PyObject* args) {
+  // parse args to get Source alg, name and source alg and source name
+  vector<PyObject*> argsV = unpack(args);
+  if (argsV.size() != 2 ||
+  (!PyFloat_Check(argsV[0]) || !PyFloat_Check(argsV[1]))) {
+    PyErr_SetString(PyExc_ValueError, "expecting arguments (Real hertz, Real tuningFrequency)");
+    return NULL;
+  }
+
+  int midi = hz2midi( Real( PyFloat_AS_DOUBLE(argsV[0]) ), Real( PyFloat_AS_DOUBLE(argsV[1])) );
+  return PyLong_FromLong( int(midi) );
+}
+
+static PyObject*
+hzToCents(PyObject* notUsed, PyObject* args) {
+  // parse args to get Source alg, name and source alg and source name
+  vector<PyObject*> argsV = unpack(args);
+
+  if (argsV.size() != 2 || !PyFloat_Check(argsV[0]) || !PyFloat_Check(argsV[1])) {
+    PyErr_SetString(PyExc_TypeError, (char*)"expecting arguments (Real frequencyA, Real frequencyB)");
+    return NULL;
+  }
+
+  int cents = hz2cents( Real( PyFloat_AS_DOUBLE(argsV[0]) ), Real( PyFloat_AS_DOUBLE(argsV[1]) ) );
+  return PyFloat_FromDouble( int(cents) );
+}
+
+static PyObject*
+centsToHz(PyObject* notUsed, PyObject* args) {
+  // parse args to get Source alg, name and source alg and source name
+  vector<PyObject*> argsV = unpack(args);
+
+  if (argsV.size() != 2 || !PyFloat_Check(argsV[0]) || !PyFloat_Check(argsV[1])) {
+    PyErr_SetString(PyExc_TypeError, (char*)"expecting arguments (Real frequencyB, Real cents)");
+    return NULL;
+  }
+
+  Real hz = cents2hz( Real( PyFloat_AS_DOUBLE(argsV[0]) ), Real( PyFloat_AS_DOUBLE(argsV[1]) ) );
+  return PyFloat_FromDouble( hz );
+}
+
+static PyObject*
+midiToNote(PyObject* notUsed, PyObject* arg) {
+
+  if (!PyLong_Check(arg)) {
+    PyErr_SetString(PyExc_TypeError, (char*)"expecting arguments (int midiNoteNumber)");
+    return NULL;
+  }
+
+  std::string note = midi2note( long( PyLong_AsLong(arg) ) );
+  const char *c_note = note.c_str();
+  return PyString_FromString( c_note );
+}
+
+static PyObject*
+noteToMidi(PyObject* notUsed, PyObject* arg) {
+
+  if (!PyString_Check(arg)) {
+    PyErr_SetString(PyExc_TypeError, (char*)"expecting arguments (string note)");
+    return NULL;
+  }
+
+  int octave = note2midi( PyString_AS_STRING(arg) );
+  return PyLong_FromLong( int(octave) );
+}
+
+static PyObject*
+noteToRoot(PyObject* notUsed, PyObject* arg) {
+
+  if (!PyString_Check(arg)) {
+    PyErr_SetString(PyExc_TypeError, (char*)"expecting arguments (string note)");
+    return NULL;
+  }
+
+  std::string root = note2root( PyString_AS_STRING(arg) );
+  const char *c_root = root.c_str();
+  return PyString_FromString( c_root );
+}
+
+static PyObject*
+noteToOctave(PyObject* notUsed, PyObject* arg) {
+
+  if (!PyString_Check(arg)) {
+    PyErr_SetString(PyExc_TypeError, (char*)"expecting arguments (string note)");
+    return NULL;
+  }
+
+  int octave = note2octave( PyString_AS_STRING(arg) );
+  return PyLong_FromLong( int(octave) );
+}
+
+static PyObject*
+hzToNote(PyObject* notUsed, PyObject* args) {
+  // parse args to get Source alg, name and source alg and source name
+  vector<PyObject*> argsV = unpack(args);
+  if (argsV.size() != 2 ||
+  (!PyFloat_Check(argsV[0]) || !PyFloat_Check(argsV[1]))) {
+    PyErr_SetString(PyExc_ValueError, "expecting arguments (Real hertz, Real tuningFrequency)");
+    return NULL;
+  }
+
+  std::string note = hz2note( Real( PyFloat_AS_DOUBLE(argsV[0]) ), Real( PyFloat_AS_DOUBLE(argsV[1]) ) );
+  const char *c_note = note.c_str();
+  return PyString_FromString( c_note );
+}
+
+static PyObject*
+noteToHz(PyObject* notUsed, PyObject* args) {
+  // parse args to get Source alg, name and source alg and source name
+  vector<PyObject*> argsV = unpack(args);
+  if (argsV.size() != 2 ||
+  (!PyString_Check(argsV[0]) || !PyFloat_Check(argsV[1]))) {
+    PyErr_SetString(PyExc_ValueError, "expecting arguments (string note, Real tuningFrequency)");
+    return NULL;
+  }
+
+  Real hz = note2hz( PyString_AS_STRING(argsV[0]), Real( PyFloat_AS_DOUBLE(argsV[1]) ) );
+  return PyFloat_FromDouble( hz );
+}
+
+static PyObject*
+velocityToDb(PyObject* notUsed, PyObject* args) {
+  // parse args to get Source alg, name and source alg and source name
+  vector<PyObject*> argsV = unpack(args);
+  if (argsV.size() != 2 ||
+  (!PyLong_Check(argsV[0]) || !PyFloat_Check(argsV[1]))) {
+    PyErr_SetString(PyExc_ValueError, "expecting arguments (int velocity, Real hearingThreshold)");
+    return NULL;
+  }
+
+  Real db = velocity2db( long( PyLong_AsLong(argsV[0]) ), Real( PyFloat_AS_DOUBLE(argsV[1]) ) );
+  return PyFloat_FromDouble( db );
+}
+
+static PyObject*
+dbToVelocity(PyObject* notUsed, PyObject* args) {
+  // parse args to get Source alg, name and source alg and source name
+  vector<PyObject*> argsV = unpack(args);
+  if (argsV.size() != 2 ||
+  (!PyFloat_Check(argsV[0]) || !PyFloat_Check(argsV[1]))) {
+    PyErr_SetString(PyExc_ValueError, "expecting arguments (Real decibels, Real hearingThreshold)");
+    return NULL;
+  }
+
+  long velocity = db2velocity( Real( PyFloat_AS_DOUBLE(argsV[0])), Real( PyFloat_AS_DOUBLE(argsV[1])) );
+  return PyLong_FromLong( int(velocity) );
+}
 
 static PyObject*
 getEquivalentKey(PyObject* notUsed, PyObject* arg) {
@@ -1001,6 +1162,18 @@ static PyMethodDef Essentia__Methods[] = {
   { "hz2bark",       hzToBark,         METH_O, "Converts a frequency in Hz to a bark band" },
   { "mel2hz",        melToHz,          METH_O, "Converts a mel band to frequency in Hz" },
   { "hz2mel",        hzToMel,          METH_O, "Converts a frequency in Hz to a mel band" },
+  { "midi2hz",       midiToHz,         METH_VARARGS, "Converts a midi note number to frequency in Hz" },
+  { "hz2midi",       hzToMidi,         METH_VARARGS, "Converts a frequency in Hz to a midi note number" },
+  { "hz2cents",      hzToCents,        METH_VARARGS, "Returns the cents distance between two frequencies in Hz" },
+  { "cents2hz",      centsToHz,        METH_VARARGS, "Returns the frequency from a frequency in Hz and cents distance" },
+  { "midi2note",     midiToNote,       METH_O, "Converts a midi note number to note applying the international pitch standard (A4=440Hz)" },
+  { "note2midi",     noteToMidi,       METH_O, "Converts note (applying the international pitch standard A4=440Hz) to midi note number" },
+  { "note2root",     noteToRoot,       METH_O, "Returns the root of a note" },
+  { "note2octave",   noteToOctave,     METH_O, "Returns the octave of a note" },
+  { "hz2note",       hzToNote,         METH_VARARGS, "Converts a frequency in Hz to a note - applying the international pitch standard A4=440Hz" },
+  { "note2hz",       noteToHz,         METH_VARARGS, "Converts a note - applying the international pitch standard A4=440Hz - into a frequency in Hz" },
+  { "velocity2db",   velocityToDb,     METH_VARARGS, "Converts a velocity to a measure in dB" },
+  { "db2velocity",   dbToVelocity,     METH_VARARGS, "Converts a dB measure of power to velocity [0-127]" },
   { "lin2db",        linToDb,          METH_O, "Converts a linear measure of power to a measure in dB" },
   { "db2lin",        dbToLin,          METH_O, "Converts a dB measure of power to a linear measure" },
   { "db2pow",        dbToPow,          METH_O, "Converts a dB measure of power to a linear measure" },