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import os
import datasets
import typing as tp
from pathlib import Path
SAMPLE_RATE = 44_100
EXTENSION = '.wav'
class Esc50Config(datasets.BuilderConfig):
"""BuilderConfig for ESC50."""
def __init__(self, features, **kwargs):
super(Esc50Config, self).__init__(version=datasets.Version("0.0.1", ""), **kwargs)
self.features = features
class ESC50(datasets.GeneratorBasedBuilder):
"""
The ESC50 dataset
"""
BUILDER_CONFIGS = [
Esc50Config(
features=datasets.Features(
{
"file": datasets.Value("string"),
"audio": datasets.Audio(sampling_rate=SAMPLE_RATE),
"sound": datasets.Value("string"),
"label": datasets.ClassLabel(names=ESC50_LABELS),
}
),
name="fold1",
description='',
),
Esc50Config(
features=datasets.Features(
{
"file": datasets.Value("string"),
"audio": datasets.Audio(sampling_rate=SAMPLE_RATE),
"sound": datasets.Value("string"),
"label": datasets.ClassLabel(names=ESC50_LABELS),
}
),
name="fold2",
description='',
),
]
def _info(self):
return datasets.DatasetInfo(
description='Environmental sound classification dataset',
features=self.config.features,
)
def _split_generators(self, dl_manager):
data_dir = dl_manager.download_and_extract("ESC-50-master.zip")
return [
datasets.SplitGenerator(
name=datasets.Split.TRAIN,
gen_kwargs={
"data_dir": data_dir,
"split": 'train'
},
),
datasets.SplitGenerator(
name=datasets.Split.TEST,
gen_kwargs={
"data_dir": data_dir,
"split": 'test'
},
),
]
def _generate_examples(self, data_dir, split):
_, _walker = fast_scandir(data_dir, [EXTENSION], recursive=True)
test_fold = self.config.name
train_fold = [f'fold{f}' for f in range(1, 11)]
train_fold.remove(test_fold)
for idx, fileid in enumerate(_walker):
fold = default_find_fold(fileid)
if split == 'train' and f'fold{fold}' in train_fold:
yield idx, {
'file': fileid,
'audio': fileid,
'sound': default_find_classes(fileid),
'label': default_find_classes(fileid)
}
elif split == 'test' and f'fold{fold}' in test_fold:
yield idx, {
'file': fileid,
'audio': fileid,
'sound': default_find_classes(fileid),
'label': default_find_classes(fileid)
}
def default_find_classes(audio_path):
id_ = Path(audio_path).stem.split('-')[-1]
return ESC50_ID2LABEL.get(int(id_))
def default_find_fold(audio_path):
fold = Path(audio_path).stem.split('-')[0]
return int(fold)
def fast_scandir(path: str, exts: tp.List[str], recursive: bool = False):
# Scan files recursively faster than glob
# From github.com/drscotthawley/aeiou/blob/main/aeiou/core.py
subfolders, files = [], []
try: # hope to avoid 'permission denied' by this try
for f in os.scandir(path):
try: # 'hope to avoid too many levels of symbolic links' error
if f.is_dir():
subfolders.append(f.path)
elif f.is_file():
if os.path.splitext(f.name)[1].lower() in exts:
files.append(f.path)
except Exception:
pass
except Exception:
pass
if recursive:
for path in list(subfolders):
sf, f = fast_scandir(path, exts, recursive=recursive)
subfolders.extend(sf)
files.extend(f) # type: ignore
return subfolders, files
ESC50_LABELS = [
"airplane",
"breathing",
"brushing_teeth",
"can_opening",
"car_horn",
"cat",
"chainsaw",
"chirping_birds",
"church_bells",
"clapping",
"clock_alarm",
"clock_tick",
"coughing",
"cow",
"crackling_fire",
"crickets",
"crow",
"crying_baby",
"dog",
"door_wood_creaks",
"door_wood_knock",
"drinking_sipping",
"engine",
"fireworks",
"footsteps",
"frog",
"glass_breaking",
"hand_saw",
"helicopter",
"hen",
"insects",
"keyboard_typing",
"laughing",
"mouse_click",
"pig",
"pouring_water",
"rain",
"rooster",
"sea_waves",
"sheep",
"siren",
"sneezing",
"snoring",
"thunderstorm",
"toilet_flush",
"train",
"vacuum_cleaner",
"washing_machine",
"water_drops",
"wind",
]
ESC50_LABEL2ID = {
"dog": 0,
"rooster": 1,
"pig": 2,
"cow": 3,
"frog": 4,
"cat": 5,
"hen": 6,
"insects": 7,
"sheep": 8,
"crow": 9,
"rain": 10,
"sea_waves": 11,
"crackling_fire": 12,
"crickets": 13,
"chirping_birds": 14,
"water_drops": 15,
"wind": 16,
"pouring_water": 17,
"toilet_flush": 18,
"thunderstorm": 19,
"crying_baby": 20,
"sneezing": 21,
"clapping": 22,
"breathing": 23,
"coughing": 24,
"footsteps": 25,
"laughing": 26,
"brushing_teeth": 27,
"snoring": 28,
"drinking_sipping": 29,
"door_wood_knock": 30,
"mouse_click": 31,
"keyboard_typing": 32,
"door_wood_creaks": 33,
"can_opening": 34,
"washing_machine": 35,
"vacuum_cleaner": 36,
"clock_alarm": 37,
"clock_tick": 38,
"glass_breaking": 39,
"helicopter": 40,
"chainsaw": 41,
"siren": 42,
"car_horn": 43,
"engine": 44,
"train": 45,
"church_bells": 46,
"airplane": 47,
"fireworks": 48,
"hand_saw": 49
}
ESC50_ID2LABEL = {v:k for k, v in ESC50_LABEL2ID.items()} |