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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,304 +1,4 @@ | ||
| __version__ = "1.0.0-beta.0" | ||
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| from collections import namedtuple | ||
| from struct import Struct | ||
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| __all__ = [ | ||
| "read", | ||
| "new_file", | ||
| "Parser", | ||
| "Writer", | ||
| "File", | ||
| "Header", | ||
| "Note", | ||
| "Layer", | ||
| "Instrument", | ||
| ] | ||
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| CURRENT_NBS_VERSION = 5 | ||
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| BYTE = Struct("<B") | ||
| SHORT = Struct("<H") | ||
| SSHORT = Struct("<h") | ||
| INT = Struct("<I") | ||
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| Instrument = namedtuple("Instrument", ["id", "name", "file", "pitch", "press_key"]) | ||
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| class Note( | ||
| namedtuple( | ||
| "Note", ["tick", "layer", "instrument", "key", "velocity", "panning", "pitch"] | ||
| ) | ||
| ): | ||
| def __new__(cls, tick, layer, instrument, key, velocity=100, panning=0, pitch=0): | ||
| return super().__new__( | ||
| cls, tick, layer, instrument, key, velocity, panning, pitch | ||
| ) | ||
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| class Layer(namedtuple("Layer", ["id", "name", "lock", "volume", "panning"])): | ||
| def __new__(cls, id, name="", lock=False, volume=100, panning=0): | ||
| return super().__new__(cls, id, name, lock, volume, panning) | ||
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| def read(filename): | ||
| with open(filename, "rb") as buff: | ||
| return Parser(buff).read_file() | ||
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| def new_file(**header): | ||
| return File(Header(**header), [], [Layer(0, "", False, 100, 0)], []) | ||
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| class Header(object): | ||
| def __init__(self, **header): | ||
| header_values = { | ||
| "version": header.get("version", CURRENT_NBS_VERSION), | ||
| "default_instruments": header.get("default_instruments", 16), | ||
| "song_length": header.get("song_length", 0), | ||
| "song_layers": header.get("song_layers", 0), | ||
| "song_name": header.get("song_name", ""), | ||
| "song_author": header.get("song_author", ""), | ||
| "original_author": header.get("original_author", ""), | ||
| "description": header.get("description", ""), | ||
| "tempo": header.get("tempo", 10.0), | ||
| "auto_save": header.get("auto_save", False), | ||
| "auto_save_duration": header.get("auto_save_duration", 10), | ||
| "time_signature": header.get("time_signature", 4), | ||
| "minutes_spent": header.get("minutes_spent", 0), | ||
| "left_clicks": header.get("left_clicks", 0), | ||
| "right_clicks": header.get("right_clicks", 0), | ||
| "blocks_added": header.get("blocks_added", 0), | ||
| "blocks_removed": header.get("blocks_removed", 0), | ||
| "song_origin": header.get("song_origin", ""), | ||
| "loop": header.get("loop", False), | ||
| "max_loop_count": header.get("max_loop_count", 0), | ||
| "loop_start": header.get("loop_start", 0), | ||
| } | ||
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| for key, value in header_values.items(): | ||
| setattr(self, key, value) | ||
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| class File(object): | ||
| def __init__(self, header, notes, layers, instruments): | ||
| self.header = header | ||
| self.notes = notes | ||
| self.layers = layers | ||
| self.instruments = instruments | ||
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| def update_header(self, version): | ||
| self.header.version = version | ||
| if self.notes: | ||
| self.header.song_length = self.notes[-1].tick | ||
| self.header.song_layers = len(self.layers) | ||
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| def save(self, filename, version=CURRENT_NBS_VERSION): | ||
| self.update_header(version) | ||
| with open(filename, "wb") as buff: | ||
| Writer(buff).encode_file(self, version) | ||
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| def __iter__(self): | ||
| if not self.notes: | ||
| return | ||
| chord = [] | ||
| current_tick = self.notes[0].tick | ||
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| for note in sorted(self.notes, key=lambda n: n.tick): | ||
| if note.tick == current_tick: | ||
| chord.append(note) | ||
| else: | ||
| chord.sort(key=lambda n: n.layer) | ||
| yield current_tick, chord | ||
| current_tick, chord = note.tick, [note] | ||
| yield current_tick, chord | ||
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| class Parser(object): | ||
| def __init__(self, buff): | ||
| self.buffer = buff | ||
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| def read_file(self): | ||
| values = self.parse_header() | ||
| header = Header(**values) | ||
| version = values["version"] | ||
| return File( | ||
| header, | ||
| list(self.parse_notes(version)), | ||
| list(self.parse_layers(header.song_layers, version)), | ||
| list(self.parse_instruments(version)), | ||
| ) | ||
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| def read_numeric(self, fmt): | ||
| return fmt.unpack(self.buffer.read(fmt.size))[0] | ||
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| def read_string(self): | ||
| length = self.read_numeric(INT) | ||
| return self.buffer.read(length).decode(encoding="cp1252") | ||
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| def jump(self): | ||
| value = -1 | ||
| while True: | ||
| jump = self.read_numeric(SHORT) | ||
| if not jump: | ||
| break | ||
| value += jump | ||
| yield value | ||
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| def parse_header(self): | ||
| song_length = self.read_numeric(SHORT) | ||
| if song_length == 0: | ||
| # A song length of 0 indicates the Open Note Block Studio format | ||
| version = self.read_numeric(BYTE) | ||
| else: | ||
| version = 0 | ||
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| return { | ||
| "version": version, | ||
| "default_instruments": self.read_numeric(BYTE) if version > 0 else 10, | ||
| "song_length": self.read_numeric(SHORT) if version >= 3 else song_length, | ||
| "song_layers": self.read_numeric(SHORT), | ||
| "song_name": self.read_string(), | ||
| "song_author": self.read_string(), | ||
| "original_author": self.read_string(), | ||
| "description": self.read_string(), | ||
| "tempo": self.read_numeric(SHORT) / 100.0, | ||
| "auto_save": self.read_numeric(BYTE) == 1, | ||
| "auto_save_duration": self.read_numeric(BYTE), | ||
| "time_signature": self.read_numeric(BYTE), | ||
| "minutes_spent": self.read_numeric(INT), | ||
| "left_clicks": self.read_numeric(INT), | ||
| "right_clicks": self.read_numeric(INT), | ||
| "blocks_added": self.read_numeric(INT), | ||
| "blocks_removed": self.read_numeric(INT), | ||
| "song_origin": self.read_string(), | ||
| "loop": self.read_numeric(BYTE) == 1 if version >= 4 else False, | ||
| "max_loop_count": self.read_numeric(BYTE) if version >= 4 else 0, | ||
| "loop_start": self.read_numeric(SHORT) if version >= 4 else 0, | ||
| } | ||
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| def parse_notes(self, version): | ||
| for current_tick in self.jump(): | ||
| for current_layer in self.jump(): | ||
| instrument = self.read_numeric(BYTE) | ||
| key = self.read_numeric(BYTE) | ||
| velocity = self.read_numeric(BYTE) if version >= 4 else 100 | ||
| panning = self.read_numeric(BYTE) - 100 if version >= 4 else 0 | ||
| pitch = self.read_numeric(SSHORT) if version >= 4 else 0 | ||
| yield Note( | ||
| current_tick, | ||
| current_layer, | ||
| instrument, | ||
| key, | ||
| velocity, | ||
| panning, | ||
| pitch, | ||
| ) | ||
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| def parse_layers(self, layers_count, version): | ||
| for i in range(layers_count): | ||
| name = self.read_string() | ||
| lock = self.read_numeric(BYTE) == 1 if version >= 4 else False | ||
| volume = self.read_numeric(BYTE) | ||
| panning = self.read_numeric(BYTE) - 100 if version >= 2 else 0 | ||
| yield Layer(i, name, lock, volume, panning) | ||
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| def parse_instruments(self, version): | ||
| for i in range(self.read_numeric(BYTE)): | ||
| name = self.read_string() | ||
| sound_file = self.read_string() | ||
| pitch = self.read_numeric(BYTE) | ||
| press_key = self.read_numeric(BYTE) == 1 | ||
| yield Instrument(i, name, sound_file, pitch, press_key) | ||
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| class Writer(object): | ||
| def __init__(self, buff): | ||
| self.buffer = buff | ||
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| def encode_file(self, nbs_file, version): | ||
| self.write_header(nbs_file, version) | ||
| self.write_notes(nbs_file, version) | ||
| self.write_layers(nbs_file, version) | ||
| self.write_instruments(nbs_file, version) | ||
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| def encode_numeric(self, fmt, value): | ||
| self.buffer.write(fmt.pack(value)) | ||
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| def encode_string(self, value): | ||
| self.encode_numeric(INT, len(value)) | ||
| self.buffer.write(value.encode(encoding="cp1252")) | ||
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| def write_header(self, nbs_file, version): | ||
| header = nbs_file.header | ||
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| if version > 0: | ||
| self.encode_numeric(SHORT, 0) | ||
| self.encode_numeric(BYTE, version) | ||
| self.encode_numeric(BYTE, header.default_instruments) | ||
| else: | ||
| self.encode_numeric(SHORT, header.song_length) | ||
| if version >= 3: | ||
| self.encode_numeric(SHORT, header.song_length) | ||
| self.encode_numeric(SHORT, header.song_layers) | ||
| self.encode_string(header.song_name) | ||
| self.encode_string(header.song_author) | ||
| self.encode_string(header.original_author) | ||
| self.encode_string(header.description) | ||
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| self.encode_numeric(SHORT, int(header.tempo * 100)) | ||
| self.encode_numeric(BYTE, int(header.auto_save)) | ||
| self.encode_numeric(BYTE, header.auto_save_duration) | ||
| self.encode_numeric(BYTE, header.time_signature) | ||
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| self.encode_numeric(INT, header.minutes_spent) | ||
| self.encode_numeric(INT, header.left_clicks) | ||
| self.encode_numeric(INT, header.right_clicks) | ||
| self.encode_numeric(INT, header.blocks_added) | ||
| self.encode_numeric(INT, header.blocks_removed) | ||
| self.encode_string(header.song_origin) | ||
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| if version >= 4: | ||
| self.encode_numeric(BYTE, int(header.loop)) | ||
| self.encode_numeric(BYTE, header.max_loop_count) | ||
| self.encode_numeric(SHORT, header.loop_start) | ||
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| def write_notes(self, nbs_file, version): | ||
| current_tick = -1 | ||
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| for tick, chord in nbs_file: | ||
| self.encode_numeric(SHORT, tick - current_tick) | ||
| current_tick = tick | ||
| current_layer = -1 | ||
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| for note in chord: | ||
| self.encode_numeric(SHORT, note.layer - current_layer) | ||
| current_layer = note.layer | ||
| self.encode_numeric(BYTE, note.instrument) | ||
| self.encode_numeric(BYTE, note.key) | ||
| if version >= 4: | ||
| self.encode_numeric(BYTE, note.velocity) | ||
| self.encode_numeric(BYTE, note.panning + 100) | ||
| self.encode_numeric(SSHORT, note.pitch) | ||
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| self.encode_numeric(SHORT, 0) | ||
| self.encode_numeric(SHORT, 0) | ||
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| def write_layers(self, nbs_file, version): | ||
| for layer in nbs_file.layers: | ||
| self.encode_string(layer.name) | ||
| if version >= 4: | ||
| self.encode_numeric(BYTE, int(layer.lock)) | ||
| self.encode_numeric(BYTE, layer.volume) | ||
| if version >= 2: | ||
| self.encode_numeric(BYTE, layer.panning + 100) | ||
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| def write_instruments(self, nbs_file, version): | ||
| self.encode_numeric(BYTE, len(nbs_file.instruments)) | ||
| for instrument in nbs_file.instruments: | ||
| self.encode_string(instrument.name) | ||
| self.encode_string(instrument.file) | ||
| self.encode_numeric(BYTE, instrument.pitch) | ||
| self.encode_numeric(BYTE, int(instrument.press_key)) | ||
| from .file import * |
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