Create some fundamental functions

Audio.py

@@ -0,0 +1,13 @@
+import pysine
+from Note import Note, NotePitch
+import time
+
+BREAK = 0
+
+def playNote(note, bpm):
+    frequency = note.toFrequency()
+    duration = 60 * 4 / note.duration / bpm
+    pysine.sine(frequency, duration)    
+    #TODO: duration powinno byc w prawdziwych nutach: 4 = cwierc, 2 = pol etc.
+
+    

Evaulator.py

@@ -1,9 +1,11 @@
+import os
 from Tokenizer import tokenize, TokenType
 from Parser import parse
 from AST import *
 import sys
 from Note import *
 import random
+import Midi
 
 class RuntimeException(Exception):
     pass
@@ -48,7 +50,7 @@ def evaluateFunctionCall(functionCall, environment):
     arguments = evaluateList(functionCall.arguments, environment)    
     for name, definition in environment.functions.items():
         if name == function:
-            return definition(arguments)
+            return definition(arguments, environment)
     raise RuntimeException(f"Function '{function}' does not exist")
         
 
@@ -129,7 +131,7 @@ def evaluate(input, environment):
     if isinstance(input, IdentifierNode):
         return evaluateIdentifier(input, environment)
   
-def rand(args):
+def rand(args, env):
     if len(args) == 1 and isinstance(args[0], list):
         return args[0][int(random.uniform(0, len(args[0])))]
 
@@ -144,16 +146,52 @@ def objectString(obj):
         return "(" + ", ".join([objectString(v) for v in obj]) + ")"
     raise RuntimeException(f"Don't know how to interpret {str(obj)}")
  
-def prt(args):
+def prt(args, env):
     print("".join([objectString(arg) for arg in args]))
 
-if __name__ == "__main__":
+def semitonesList(list):
+    withoutPauses = tuple(filter(lambda x: isinstance(x, Note), list))    
+    r = [Note.checkInterval(withoutPauses[i-1], withoutPauses[i]) for i, _ in enumerate(withoutPauses) if i != 0]
+    return r[0] if len(r) == 1 else r
 
+def semitones(args, env):
+    if len(args) > 0 and isinstance(args[0], list):
+        return semitonesList(args[0])
+    return semitonesList(args)
+
+def intervalList(list):    
+    r = [intervalToString(x) for x in list]
+    return r[0] if len(r) == 1 else r
+
+def interval(args, env):    
+    if len(args) > 0 and isinstance(args[0], list):        
+        return intervalList(args[0])
+    return intervalList(args)
+ 
+def transpose(args, env):
+    if len(args) > 1 and isinstance(args[0], int):
+        value = args[0]
+        transposed = []
+        for i, arg in enumerate(args):            
+            if i == 0:
+                continue
+            if not isinstance(arg, list):
+                return # is not list            
+            transposed.append([note.transpose(value) for note in arg if isinstance(note, Note)])
+        return transposed
+    else:
+        return # not valid signature
+ 
+if __name__ == "__main__":            
     functions = {
         'print': prt,
-        'midi': lambda args: print(":".join([str(type(arg)) for arg in args])),
+        'midi': Midi.play,
-        'type': lambda args: print(type(args[0])),
+        'pause': Midi.pause,
-        'random': rand
+        'type': lambda args, env: print(type(args[0])),
+        'random': rand,
+        'semitones': semitones,
+        'interval': interval,
+        'transpose': transpose
         
     }
     
@@ -163,6 +201,6 @@ if __name__ == "__main__":
     tokens = [token for token in tokenize(lines) if token.type != TokenType.COMMENT]
        
     ast = parse(tokens)                
-    environment = Environment([{}], functions)
+    environment = Environment([{ "bpm": 120 }], functions)
     evaluate(ast, environment)
     

Midi.py

@@ -0,0 +1,44 @@
+from Note import *
+import Audio
+import os
+import sys
+import time
+
+def parseNotes(notes):
+    map = { NotePitch.C: 'c', NotePitch.CIS: 'c#', NotePitch.D: 'd', NotePitch.DIS: 'd#',
+           NotePitch.E: 'e', NotePitch.F: 'f', NotePitch.FIS: 'f#', NotePitch.G: 'g',
+           NotePitch.GIS: 'g#', NotePitch.A: 'a', NotePitch.AIS: 'a#', NotePitch.H: 'b' }
+    parsed = [(f"{map[note.note]}{note.octave}", note.duration) for note in notes]
+    print(parsed)
+  
+def play(args, env):
+    if len(args) > 0 and isinstance(args[0], list):
+        playList(args[0], env)
+        return    
+    playList(args, env)        
+
+def playList(notes, env):
+    bpm = findVariable("bpm", env)
+    if all(isinstance(x, Note) or isinstance(x, int) for x in notes):
+        for x in notes:
+            if isinstance(x, Note):
+                Audio.playNote(x, bpm)
+            if isinstance(x, int):
+                doPause(x, bpm)
+    #sys.stdout = open(os.devnull, 'w')
+    #sys.stderr = open(os.devnull, 'w')
+    #sys.stdout = sys.__stdout__
+    #sys.stderr = sys.__stderr__    
+    
+def findVariable(name, environment):
+    for scope in reversed(environment.scopes):
+        if name in scope:
+            return scope[name]
+
+def pause(args, env):
+    bpm = findVariable("bpm", env)
+    value = args[0]
+    doPause(value, bpm)
+    
+def doPause(value, bpm):
+    time.sleep(60 * 4 / value / bpm)

Note.py

@@ -1,5 +1,6 @@
 from enum import Enum
 from Error import ParseError
+import math
 
 class NotePitch(Enum):
     C = 1
@@ -21,6 +22,26 @@ class NotePitch(Enum):
     def __repr__(self):
         return self.__str__()    
     
+    def toFrequency(self):
+        return {
+            NotePitch.C: 16.35,
+            NotePitch.CIS: 17.32,
+            NotePitch.D: 18.35,
+            NotePitch.DIS: 19.45,
+            NotePitch.E: 20.60,
+            NotePitch.F: 21.83,
+            NotePitch.FIS: 23.12,
+            NotePitch.G: 24.50,
+            NotePitch.GIS: 25.96,
+            NotePitch.A: 27.50,
+            NotePitch.AIS: 29.17,
+            NotePitch.H: 30.87
+        }[self]
+    
+    @staticmethod
+    def checkInterval(a, b):
+        return a.value - b.value
+    
     @staticmethod
     def toPitch(string):
         try:
@@ -41,7 +62,7 @@ class NotePitch(Enum):
         return [note[1] for note in NotePitch.__members__.items() if note[1].value >= aValue and note[1].value <= bValue]
 
 class Note:
-    def __init__(self, note, octave, duration):        
+    def __init__(self, note, octave = 4, duration = 4):        
         if type(note) == str:            
             self.note = NotePitch.toPitch(note)
         else:
@@ -49,6 +70,52 @@ class Note:
         self.octave = octave
         self.duration = duration        
     
+    def hash(self):
+        return f"{self.note.value}{self.octave}{self.duration}"
+    
+    def toFrequency(self):
+        return self.note.toFrequency() * 2 ** self.octave
+    
+    def transpose(self, interval):
+        origIntRepr = self._intRepr()
+        transposedIntRepr = origIntRepr + interval
+        pitch = transposedIntRepr % len(NotePitch)
+        note = NotePitch(pitch if pitch != 0 else self.note.value)
+        octave = int(transposedIntRepr / len(NotePitch))
+        return Note(note, octave, self.duration)
+    
+    def _intRepr(self):
+        return self.octave * len(NotePitch) + self.note.value
+    
+    def __str__(self):
+        return f"{self.note}({self.octave}')[{self.duration}]"
+    
+    def __repr__(self):
+        return self.__str__()
+    
+    @staticmethod
+    def checkInterval(a, b):
+        return a._intRepr() - b._intRepr()
+    
     @staticmethod
     def range(a, b):        
         return [Note(note, 1, 1) for note in NotePitch.range(a.note, b.note)]
+    
+def intervalToString(interval):
+    octaveInterval = int(abs(interval) / len(NotePitch))
+    pitchInterval = abs(interval) % len(NotePitch)
+    pitchIntervalName = {
+        0: "1",
+        1: "1>/2<",
+        2: "2",
+        3: "3<",
+        4: "3>",
+        5: "4",
+        6: "4>/5<",
+        7: "5",
+        8: "6<",
+        9: "6>",
+        10: "7<",
+        11: "7>"        
+    }
+    return (str(pitchIntervalName[pitchInterval]) + (f"(+{octaveInterval}')" if octaveInterval > 0 else ""))

Parser.py

@@ -17,8 +17,8 @@ def parseNote(input, parent):
     consumedChars = 1
     notePitch = value[consumedChars]
     consumedChars += 1
-    octave = 1
+    octave = 4
-    duration = 1
+    duration = 4
     if consumedChars < len(value) and value[consumedChars] in ('b', '#'):
         notePitch += value[consumedChars]
         consumedChars += 1