Audio Dataset

audio_toolset/audio_augmentation.py

@@ -15,6 +15,9 @@ class Speed(object):
         # noinspection PyTypeChecker
         self.max_amount = min(max(0, max_amount), 1)
 
+    def __repr__(self):
+        return f'{self.__class__.__name__}({self.__dict__})'
+
     def __call__(self, x):
         if self.speed_min == 1 and self.speed_max == 1:
             return x

audio_toolset/audio_io.py

@@ -37,6 +37,9 @@ class MFCC(object):
     def __init__(self, **kwargs):
         self.__dict__.update(kwargs)
 
+    def __repr__(self):
+        return f'{self.__class__.__name__}({self.__dict__})'
+
     def __call__(self, y):
         mfcc = librosa.feature.mfcc(y, **self.__dict__)
         return mfcc
@@ -47,6 +50,9 @@ class NormalizeLocal(object):
         self.cache: np.ndarray
         pass
 
+    def __repr__(self):
+        return f'{self.__class__.__name__}({self.__dict__})'
+
     def __call__(self, x: np.ndarray):
         mean = x.mean()
         std = x.std() + 0.0001
@@ -65,6 +71,9 @@ class NormalizeMelband(object):
         self.cache: np.ndarray
         pass
 
+    def __repr__(self):
+        return f'{self.__class__.__name__}({self.__dict__})'
+
     def __call__(self, x: np.ndarray):
         mean = x.mean(-1).unsqueeze(-1)
         std = x.std(-1).unsqueeze(-1)
@@ -98,6 +107,9 @@ class PowerToDB(object):
     def __init__(self, running_max=False):
         self.running_max = 0 if running_max else None
 
+    def __repr__(self):
+        return f'{self.__class__.__name__}({self.__dict__})'
+
     def __call__(self, x):
         if self.running_max is not None:
             self.running_max = max(np.max(x), self.running_max)
@@ -109,6 +121,9 @@ class LowPass(object):
     def __init__(self, sr=16000):
         self.sr = sr
 
+    def __repr__(self):
+        return f'{self.__class__.__name__}({self.__dict__})'
+
     def __call__(self, x):
         return butter_lowpass_filter(x, 1000, 1)
 
@@ -117,6 +132,9 @@ class MelToImage(object):
     def __init__(self):
         pass
 
+    def __repr__(self):
+        return f'{self.__class__.__name__}({self.__dict__})'
+
     def __call__(self, x):
         # Source to Solution: https://stackoverflow.com/a/57204349
         mels = np.log(x + 1e-9)  # add small number to avoid log(0)

audio_toolset/mel_dataset.py

@@ -0,0 +1,30 @@
+from pathlib import Path
+
+import numpy as np
+from torch.utils.data import Dataset
+
+
+class TorchMelDataset(Dataset):
+    def __init__(self, identifier, mel_path, segment_len, hop_len, label, padding=0, transform=None):
+        self.padding = padding
+        self.path = next(iter(Path(mel_path).glob(f'{identifier}_*')))
+        self.segment_len = segment_len
+        self.m, self.n = str(self.path).split('_')[-2:]  # get spectrogram dimensions
+        self.n = int(self.n.split('.', 1)[0])  # remove .npy
+        self.m, self.n = (int(i) for i in (self.m, self.n))
+        self.offsets = list(range(0, self.n - segment_len, hop_len))
+        self.label = label
+        self.transform = transform
+
+    def __getitem__(self, item):
+        start = self.offsets[item]
+        mel_spec = np.load(str(self.path), allow_pickle=True)
+        if self.padding > 0:
+            mel_spec = np.pad(mel_spec, pad_width=[(0, 0), (self.padding // 2, self.padding // 2)], mode='mean')
+        snippet = mel_spec[:, start: start + self.segment_len]
+        if self.transform:
+            snippet = self.transform(snippet)
+        return snippet, self.label
+
+    def __len__(self):
+        return len(self.offsets)

audio_toolset/mel_transforms.py

@@ -8,6 +8,9 @@ class Normalize(object):
     def __init__(self, min_db_level: Union[int, float]):
         self.min_db_level = min_db_level
 
+    def __repr__(self):
+        return f'{self.__class__.__name__}({self.__dict__})'
+
     def __call__(self, s: np.ndarray) -> np.ndarray:
         return np.clip((s - self.min_db_level) / -self.min_db_level, 0, 1)
 
@@ -17,5 +20,8 @@ class DeNormalize(object):
     def __init__(self, min_db_level: Union[int, float]):
         self.min_db_level = min_db_level
 
+    def __repr__(self):
+        return f'{self.__class__.__name__}({self.__dict__})'
+
     def __call__(self, s: np.ndarray) -> np.ndarray:
         return (np.clip(s, 0, 1) * -self.min_db_level) + self.min_db_level

modules/util.py

@@ -1,5 +1,3 @@
-from typing import List
-
 from functools import reduce
 
 from abc import ABC
@@ -13,6 +11,7 @@ from torch.nn import functional as F, Unfold
 # Utility - Modules
 ###################
 from ..utils.model_io import ModelParameters
+from ..utils.tools import locate_and_import_class
 
 try:
     import pytorch_lightning as pl
@@ -45,6 +44,15 @@ try:
         def size(self):
             return self.shape
 
+        @property
+        def dataset_class(self):
+            try:
+                return locate_and_import_class(self.params.class_name, folder_path='datasets')
+            except AttributeError as e:
+                raise AttributeError(f'The dataset alias you provided ("{self.params.class_name}") ' +
+                                     f'was not found!\n' +
+                                     f'{e}')
+
         def save_to_disk(self, model_path):
             Path(model_path, exist_ok=True).mkdir(parents=True, exist_ok=True)
             if not (model_path / 'model_class.obj').exists():
@@ -83,6 +91,7 @@ try:
 
 except ImportError:
     module_types = (nn.Module,)
+    pl = None
     pass  # Maybe post a hint to install pytorch-lightning.
 
 

utils/config.py

@@ -92,12 +92,21 @@ class Config(ConfigParser, ABC):
     @property
     def model_class(self):
         try:
-            return locate_and_import_class(self.model.type)
+            return locate_and_import_class(self.model.type, folder_path='models')
         except AttributeError as e:
             raise AttributeError(f'The model alias you provided ("{self.get("model", "type")}") ' +
                                  f'was not found!\n' +
                                  f'{e}')
 
+    @property
+    def data_class(self):
+        try:
+            return locate_and_import_class(self.data.class_name, folder_path='datasets')
+        except AttributeError as e:
+            raise AttributeError(f'The dataset alias you provided ("{self.get("data", "class_name")}") ' +
+                                 f'was not found!\n' +
+                                 f'{e}')
+
     # --------------------------------------------------
     # TODO: Do this programmatically; This did not work:
     # Initialize Default Sections as Property

utils/tools.py

@@ -41,10 +41,10 @@ def check_path(file_path):
     assert str(file_path).endswith('.pik')
 
 
-def locate_and_import_class(class_name, models_location: Union[str, PurePath] = 'models', forceload=False):
+def locate_and_import_class(class_name, folder_path: Union[str, PurePath] = ''):
     """Locate an object by name or dotted path, importing as necessary."""
-    models_location = Path(models_location)
+    folder_path = Path(folder_path)
-    module_paths = [x for x in models_location.rglob('*.py') if x.is_file() and '__init__' not in x.name]
+    module_paths = [x for x in folder_path.rglob('*.py') if x.is_file() and '__init__' not in x.name]
     for module_path in module_paths:
         mod = importlib.import_module('.'.join([x.replace('.py', '') for x in module_path.parts]))
         try: