af6d61c8a1
Replace FL Studio binary .flp output with REAPER text-based .rpp output using the rpp Python library (Perlence/rpp). - Add core/schema.py: DAW-agnostic data types (SongDefinition, TrackDef, ClipDef, MidiNote, PluginDef) - Add reaper_builder/: RPP file generation via rpp.Element + headless render via reaper.exe CLI - Add composer/converters.py: bridge rhythm.py/melodic.py note dicts to core.schema MidiNote objects - Rewrite scripts/compose.py: real generator pipeline with --render flag - Delete src/flp_builder/, src/scanner/, mcp/, flstudio-mcp/, old scripts - Add 40 passing tests (schema, builder, converters, compose, render)
65 lines
2.0 KiB
Python
65 lines
2.0 KiB
Python
"""Converters — transform generator output to MIDI notes for SongDefinition.
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rhythm generators → MidiNote list (channel → GM pitch mapping)
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melodic generators → MidiNote list (note["key"] = pitch directly)
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"""
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from __future__ import annotations
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from src.core.schema import MidiNote
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# ---------------------------------------------------------------------------
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# GM drum pitch mapping — channels 10-16
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# ---------------------------------------------------------------------------
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CHANNEL_PITCH: dict[int, int] = {
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10: 39, # perc (General MIDI channel 10 = percussion)
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11: 36, # kick
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12: 38, # snare
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13: 37, # rim
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14: 50, # perc2
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15: 42, # hihat
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16: 39, # clap
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}
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def rhythm_to_midi(note_dict: dict[int, list[dict]]) -> list[MidiNote]:
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"""Convert rhythm generator output (channel → note list) to MidiNote list.
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note_dict: {channel: [{"pos", "len", "key", "vel"}, ...]}
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- channel must be in CHANNEL_PITCH (10-16)
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- pitch = CHANNEL_PITCH[channel]
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- start = note["pos"]
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- duration = note["len"]
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- velocity = note["vel"]
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"""
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midi_notes: list[MidiNote] = []
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for channel, notes in note_dict.items():
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pitch = CHANNEL_PITCH.get(channel, 60)
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for note in notes:
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midi_notes.append(MidiNote(
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pitch=pitch,
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start=note["pos"],
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duration=note["len"],
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velocity=note["vel"],
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))
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return midi_notes
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def melodic_to_midi(note_list: list[dict]) -> list[MidiNote]:
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"""Convert melodic generator output (list of note dicts) to MidiNote list.
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note_list: [{"pos", "len", "key", "vel"}, ...]
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- pitch = note["key"] (directly used, not mapped)
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- start = note["pos"]
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- duration = note["len"]
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- velocity = note["vel"]
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"""
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return [
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MidiNote(
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pitch=note["key"],
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start=note["pos"],
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duration=note["len"],
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velocity=note["vel"],
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)
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for note in note_list
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] |