123 lines
4.7 KiB
Python
123 lines
4.7 KiB
Python
"""Collection of converters"""
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from ziffers import zparse, Ziffers, Pitch, Rest, Chord, accidentals_from_note_name
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try:
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from music21 import converter, note, stream, meter, chord, environment, tempo, key
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music21_imported: bool = True
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except ImportError:
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music21_imported: bool = False
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try:
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import ctcsound
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csound_imported: bool = True
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except (ImportError, TypeError) as Error:
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csound_imported: bool = False
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def ziffers_to_csound_score(ziffers: Ziffers, bpm: int=80, amp: float=1500, instr: (int|str)=1) -> str:
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""" Transform Ziffers object to Csound score in format:
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i {instrument} {start time} {duration} {amplitude} {frequency} """
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if not csound_imported:
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raise ImportError("Install Csound")
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score = ""
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instr = f'"{instr}"' if isinstance(instr, str) else instr
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start_time = 0
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for item in ziffers.evaluated_values:
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if isinstance(item, Chord):
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for freq, dur in zip(item.get_freq(), item.get_duration()):
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score += f"i {instr} {start_time} {dur * 4 * 60 / bpm} {amp} {freq:.2f}\n"
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start_time += max(item.get_duration()) * 4 * 60 / bpm
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elif isinstance(item, Rest):
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score += f"i {instr} {start_time} {item.get_duration() * 4 * 60 / bpm} {amp} 0\n"
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elif isinstance(item, Pitch):
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score += f"i {instr} {start_time} {item.get_duration() * 4 * 60 / bpm} {amp} {item.get_freq():.2f}\n"
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start_time += item.get_duration() * 4 * 60 / bpm
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return score
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def to_music21(expression: str | Ziffers, **options):
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"""Helper for passing options to the parser"""
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if not music21_imported:
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raise ImportError("Install Music21 library")
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# Register the ZiffersMusic21 converter
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converter.registerSubConverter(ZiffersMusic21)
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if isinstance(expression, Ziffers):
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if options:
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options["preparsed"] = expression
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else:
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options = {"preparsed": expression}
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options = {"ziffers": options}
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return converter.parse("PREPARSED", format="ziffers", keywords=options)
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if options:
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options = {"ziffers": options}
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return converter.parse(expression, format="ziffers", keywords=options)
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test = converter.parse(expression, format="ziffers")
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return test
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def set_musescore_path(path: str):
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"""Helper for setting the Musescore path"""
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settings = environment.UserSettings()
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# Default windows path:
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# 'C:\\Program Files\\MuseScore 3\\bin\\MuseScore3.exe'
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settings["musicxmlPath"] = path
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settings["musescoreDirectPNGPath"] = path
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if music21_imported:
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# pylint: disable=locally-disabled, invalid-name, unused-argument, attribute-defined-outside-init
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class ZiffersMusic21(converter.subConverters.SubConverter):
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"""Ziffers converter to Music21"""
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registerFormats = ("ziffers",)
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registerInputExtensions = ("zf",)
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def parseData(self, dataString, number=None):
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"""Parses Ziffers string to Music21 object"""
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# Look for options in keywords object
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keywords = self.keywords["keywords"]
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if "ziffers" in keywords:
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options = keywords["ziffers"]
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if "preparsed" in options:
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parsed = options["preparsed"]
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else:
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parsed = zparse(dataString, **options)
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else:
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parsed = zparse(dataString)
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note_stream = stream.Part()
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if "time" in options:
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m_item = meter.TimeSignature(options["time"]) # Common time
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else:
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m_item = meter.TimeSignature("c") # Common time
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note_stream.insert(0, m_item)
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if "key" in options:
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accidentals = accidentals_from_note_name(options["key"])
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if "scale" in options and options["scale"].upper() == "MINOR":
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accidentals-=3 # If minor, subtract 3 from accidentals
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note_stream.append(key.KeySignature(accidentals))
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if "bpm" in options:
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note_stream.append(tempo.MetronomeMark(number=options["bpm"]))
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for item in parsed:
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if isinstance(item, Pitch):
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m_item = note.Note(item.note)
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m_item.duration.quarterLength = item.duration * 4
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elif isinstance(item, Rest):
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m_item = note.Rest(item.duration * 4)
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elif isinstance(item, Chord):
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m_item = chord.Chord(item.notes)
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m_item.duration.quarterLength = item.duration * 4
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note_stream.append(m_item)
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# TODO: Is this ok?
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self.stream = note_stream.makeMeasures() |