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from __future__ import annotations
from logging import getLogger
from pathlib import Path
import keyboard
import librosa
import sounddevice as sd
import soundfile as sf
from rich.console import Console
from tqdm.rich import tqdm
LOG = getLogger(__name__)
def preprocess_classify(
input_dir: Path | str, output_dir: Path | str, create_new: bool = True
) -> None:
# paths
input_dir_ = Path(input_dir)
output_dir_ = Path(output_dir)
speed = 1
if not input_dir_.is_dir():
raise ValueError(f"{input_dir} is not a directory.")
output_dir_.mkdir(exist_ok=True)
console = Console()
# get audio paths and folders
audio_paths = list(input_dir_.glob("*.*"))
last_folders = [x for x in output_dir_.glob("*") if x.is_dir()]
console.print("Press ↑ or ↓ to change speed. Press any other key to classify.")
console.print(f"Folders: {[x.name for x in last_folders]}")
pbar_description = ""
pbar = tqdm(audio_paths)
for audio_path in pbar:
# read file
audio, sr = sf.read(audio_path)
# update description
duration = librosa.get_duration(y=audio, sr=sr)
pbar_description = f"{duration:.1f} {pbar_description}"
pbar.set_description(pbar_description)
while True:
# start playing
sd.play(librosa.effects.time_stretch(audio, rate=speed), sr, loop=True)
# wait for key press
key = str(keyboard.read_key())
if key == "down":
speed /= 1.1
console.print(f"Speed: {speed:.2f}")
elif key == "up":
speed *= 1.1
console.print(f"Speed: {speed:.2f}")
else:
break
# stop playing
sd.stop()
# print if folder changed
folders = [x for x in output_dir_.glob("*") if x.is_dir()]
if folders != last_folders:
console.print(f"Folders updated: {[x.name for x in folders]}")
last_folders = folders
# get folder
folder_candidates = [x for x in folders if x.name.startswith(key)]
if len(folder_candidates) == 0:
if create_new:
folder = output_dir_ / key
else:
console.print(f"No folder starts with {key}.")
continue
else:
if len(folder_candidates) > 1:
LOG.warning(
f"Multiple folders ({[x.name for x in folder_candidates]}) start with {key}. "
f"Using first one ({folder_candidates[0].name})."
)
folder = folder_candidates[0]
folder.mkdir(exist_ok=True)
# move file
new_path = folder / audio_path.name
audio_path.rename(new_path)
# update description
pbar_description = f"Last: {audio_path.name} -> {folder.name}"
# yield result
# yield audio_path, key, folder, new_path
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