torchaudio testing

audio_toolset/audio_io.py

@@ -1,3 +1,7 @@
+from typing import Union
+
+import torch
+
 try:
     import librosa
 except ImportError:  # pragma: no-cover
@@ -10,9 +14,6 @@ except ImportError:  # pragma: no-cover
                       ' install it with `pip install scikit-learn`.')
 
 
-import numpy as np
-
-
 def scale_minmax(x, min_val=0.0, max_val=1.0):
     x_std = (x - x.min()) / (x.max() - x.min())
     x_scaled = x_std * (max_val - min_val) + min_val
@@ -47,13 +48,12 @@ class MFCC(object):
 
 class NormalizeLocal(object):
     def __init__(self):
-        self.cache: np.ndarray
         pass
 
     def __repr__(self):
         return f'{self.__class__.__name__}({self.__dict__})'
 
-    def __call__(self, x: np.ndarray):
+    def __call__(self, x: torch.Tensor):
         mean = x.mean()
         std = x.std() + 0.0001
 
@@ -61,37 +61,47 @@ class NormalizeLocal(object):
         # tensor = tensor.__sub__(mean).__div__(std)
         # Numpy Version
         x = (x - mean) / std
-        x[np.isnan(x)] = 0
+
-        x[np.isinf(x)] = 0
+        x[torch.isnan(x)] = 0
+        x[torch.isinf(x)] = 0
+
         return x
 
 
 class NormalizeMelband(object):
     def __init__(self):
-        self.cache: np.ndarray
+
         pass
 
     def __repr__(self):
         return f'{self.__class__.__name__}({self.__dict__})'
 
-    def __call__(self, x: np.ndarray):
+    def __call__(self, x: torch.Tensor):
         mean = x.mean(-1).unsqueeze(-1)
         std = x.std(-1).unsqueeze(-1)
 
         x = x.__sub__(mean).__div__(std)
-        x[np.isnan(x)] = 0
+        x[torch.isnan(x)] = 0
-        x[np.isinf(x)] = 0
+        x[torch.isinf(x)] = 0
         return x
 
 
-class AudioToMel(object):
+class LibrosaAudioToMel(object):
     def __init__(self, amplitude_to_db=False, power_to_db=False, **mel_kwargs):
         assert not all([amplitude_to_db, power_to_db]), "Choose amplitude_to_db or power_to_db, not both!"
+        # Mel kwargs are:
+        #   sr
+        #   n_mels
+        #   n_fft
+        #   hop_length
+
         self.mel_kwargs = mel_kwargs
         self.amplitude_to_db = amplitude_to_db
         self.power_to_db = power_to_db
 
     def __call__(self, y):
+        import numpy as np
+
         mel = librosa.feature.melspectrogram(y, **self.mel_kwargs)
         if self.amplitude_to_db:
             mel = librosa.amplitude_to_db(mel, ref=np.max)
@@ -111,6 +121,7 @@ class PowerToDB(object):
         return f'{self.__class__.__name__}({self.__dict__})'
 
     def __call__(self, x):
+        import numpy as np
         if self.running_max is not None:
             self.running_max = max(np.max(x), self.running_max)
             return librosa.power_to_db(x, ref=self.running_max)
@@ -137,11 +148,11 @@ class MelToImage(object):
 
     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)
+        mels = torch.log(x + 1e-9)  # add small number to avoid log(0)
 
         # min-max scale to fit inside 8-bit range
-        img = scale_minmax(mels, 0, 255).astype(np.uint8)
+        img = scale_minmax(mels, 0, 255).int()
-        img = np.flip(img, axis=0)  # put low frequencies at the bottom in image
+        img = torch.flip(img, dims=(0,))  # put low frequencies at the bottom in image
-        img = 255 - img  # invert. make black==more energy
+        img = torch.as_tensor(255) - img  # invert. make black==more energy
-        img = img.astype(np.float32)
+        img = img.float()
         return img

audio_toolset/audio_to_mel_dataset.py

@@ -0,0 +1,163 @@
+import sys
+from pathlib import Path
+
+import pickle
+from abc import ABC
+from torch.utils.data import Dataset
+from torchvision.transforms import Compose
+
+from ml_lib.audio_toolset.audio_io import LibrosaAudioToMel, MelToImage
+from ml_lib.audio_toolset.mel_dataset import TorchMelDataset
+
+
+class _AudioToMelDataset(Dataset, ABC):
+
+    @property
+    def audio_file_duration(self):
+        raise NotImplementedError
+
+    @property
+    def sampling_rate(self):
+        raise NotImplementedError
+
+    def __init__(self, audio_file_path, label, sample_segment_len=1, sample_hop_len=1, reset=False,
+                 audio_augmentations=None, mel_augmentations=None, mel_kwargs=None, **kwargs):
+        self.ignored_kwargs = kwargs
+        self.mel_kwargs = mel_kwargs
+        self.reset = reset
+        self.audio_path = Path(audio_file_path)
+
+        mel_folder_suffix = self.audio_path.parent.parent.name
+        self.mel_file_path = Path(str(self.audio_path)
+                                  .replace(mel_folder_suffix, f'{mel_folder_suffix}_mel_folder')
+                                  .replace(self.audio_path.suffix, '.npy'))
+
+        self.audio_augmentations = audio_augmentations
+
+        self.dataset = TorchMelDataset(self.mel_file_path, sample_segment_len, sample_hop_len, label,
+                                       self.audio_file_duration, mel_kwargs['sample_rate'], mel_kwargs['hop_length'],
+                                       mel_kwargs['n_mels'], transform=mel_augmentations)
+
+    def _build_mel(self):
+        raise NotImplementedError
+
+    def __getitem__(self, item):
+        try:
+            return self.dataset[item]
+        except FileNotFoundError:
+            assert self._build_mel()
+        return self.dataset[item]
+
+    def __len__(self):
+        return len(self.dataset)
+
+
+import librosa
+
+
+class LibrosaAudioToMelDataset(_AudioToMelDataset):
+
+    @property
+    def audio_file_duration(self):
+        return librosa.get_duration(sr=self.mel_kwargs.get('sr', None), filename=self.audio_path)
+
+    @property
+    def sampling_rate(self):
+        return self.mel_kwargs.get('sr', None)
+
+    def __init__(self, audio_file_path, *args, **kwargs):
+
+        audio_file_path = Path(audio_file_path)
+        # audio_file, sampling_rate = librosa.load(self.audio_path, sr=sampling_rate)
+        mel_kwargs = kwargs.get('mel_kwargs', dict())
+        mel_kwargs.update(sr=mel_kwargs.get('sr', None) or librosa.get_samplerate(self.audio_path))
+        kwargs.update(mel_kwargs=mel_kwargs)
+
+        super(LibrosaAudioToMelDataset, self).__init__(audio_file_path, *args, **kwargs)
+
+        self._mel_transform = Compose([LibrosaAudioToMel(**mel_kwargs),
+                                       MelToImage()
+                                       ])
+
+
+    def _build_mel(self):
+        if self.reset:
+            self.mel_file_path.unlink(missing_ok=True)
+        if not self.mel_file_path.exists():
+            self.mel_file_path.parent.mkdir(parents=True, exist_ok=True)
+            raw_sample, _ = librosa.core.load(self.audio_path, sr=self.sampling_rate)
+            mel_sample = self._mel_transform(raw_sample)
+            with self.mel_file_path.open('wb') as mel_file:
+                pickle.dump(mel_sample, mel_file, protocol=pickle.HIGHEST_PROTOCOL)
+        else:
+            pass
+
+        return self.mel_file_path.exists()
+
+
+import torchaudio
+if sys.platform =='windows':
+    torchaudio.set_audio_backend('soundfile')
+else:
+    torchaudio.set_audio_backend('sox_io')
+
+
+class PyTorchAudioToMelDataset(_AudioToMelDataset):
+
+    @property
+    def audio_file_duration(self):
+        info_obj = torchaudio.info(self.audio_path)
+        return info_obj.num_frames / info_obj.sample_rate
+
+    @property
+    def sampling_rate(self):
+        return self.mel_kwargs['sample_rate']
+
+    def __init__(self, audio_file_path, *args, **kwargs):
+        super(PyTorchAudioToMelDataset, self).__init__(audio_file_path, *args, **kwargs)
+
+        audio_file_path = Path(audio_file_path)
+        # audio_file, sampling_rate = librosa.load(self.audio_path, sr=sampling_rate)
+
+        from torchaudio.transforms import MelSpectrogram
+        self._mel_transform = Compose([MelSpectrogram(**self.mel_kwargs),
+                                       MelToImage()
+                                       ])
+
+    def _build_mel(self):
+        if self.reset:
+            self.mel_file_path.unlink(missing_ok=True)
+        if not self.mel_file_path.exists():
+            self.mel_file_path.parent.mkdir(parents=True, exist_ok=True)
+            lock_file = Path(str(self.mel_file_path).replace(self.mel_file_path.suffix, '.lock'))
+            lock_file.touch(exist_ok=False)
+
+            try:
+                audio_sample, sample_rate = torchaudio.load(self.audio_path)
+            except RuntimeError:
+                import soundfile
+
+                data, samplerate = soundfile.read(self.audio_path)
+                # sf.available_formats()
+                # sf.available_subtypes()
+                soundfile.write(self.audio_path, data, samplerate, subtype='PCM_32')
+
+                audio_sample, sample_rate = torchaudio.load(self.audio_path)
+            if sample_rate != self.sampling_rate:
+                resample = torchaudio.transforms.Resample(orig_freq=int(sample_rate), new_freq=int(self.sampling_rate))
+                audio_sample = resample(audio_sample)
+            if audio_sample.shape[0] > 1:
+                # Transform Stereo to Mono
+                audio_sample = audio_sample.mean(dim=0, keepdim=True)
+            mel_sample = self._mel_transform(audio_sample)
+            with self.mel_file_path.open('wb') as mel_file:
+                pickle.dump(mel_sample, mel_file, protocol=pickle.HIGHEST_PROTOCOL)
+            lock_file.unlink()
+        else:
+            # print(f"Already existed.. Skipping {filename}")
+            # mel_file = mel_file
+            pass
+
+        # with mel_file.open(mode='rb') as f:
+        #     mel_sample = pickle.load(f, fix_imports=True)
+        return self.mel_file_path.exists()

audio_toolset/mel_augmentation.py

@@ -1,63 +1,66 @@
+import torch
 import numpy as np
 
+from ml_lib.utils.transforms import _BaseTransformation
 
-class NoiseInjection(object):
 
-    def __init__(self, noise_factor: float, sigma=0.5, mu=0.5):
+class NoiseInjection(_BaseTransformation):
-        assert noise_factor >= 0, f'max_shift_ratio has to be greater then 0, but was: {noise_factor}.'
+
+    def __init__(self, noise_factor: float, sigma=1, mu=0):
+        super(NoiseInjection, self).__init__()
+        assert noise_factor >= 0, f'noise_factor has to be greater then 0, but was: {noise_factor}.'
         self.mu = mu
         self.sigma = sigma
         self.noise_factor = noise_factor
 
-    def __call__(self, x: np.ndarray):
+    def __call__(self, x):
         if self.noise_factor:
-            noise = np.random.uniform(0, self.noise_factor, size=x.shape)
+            noise = torch.normal(self.mu, self.sigma, size=x.shape, device=x.device) * self.noise_factor
             augmented_data = x + x * noise
-            # Cast back to same data type
-            augmented_data = augmented_data.astype(x.dtype)
             return augmented_data
         else:
             return x
 
 
-class LoudnessManipulator(object):
+class LoudnessManipulator(_BaseTransformation):
 
     def __init__(self, max_factor: float):
+        super(LoudnessManipulator, self).__init__()
         assert 1 > max_factor >= 0, f'max_shift_ratio has to be between [0,1], but was: {max_factor}.'
 
         self.max_factor = max_factor
 
-    def __call__(self, x: np.ndarray):
+    def __call__(self, x):
         if self.max_factor:
-            augmented_data = x + x * (np.random.random() * self.max_factor)
+            augmented_data = x + x * (torch.rand(1, device=x.device) * self.max_factor)
-            # Cast back to same data type
-            augmented_data = augmented_data.astype(x.dtype)
             return augmented_data
         else:
             return x
 
 
-class ShiftTime(object):
+class ShiftTime(_BaseTransformation):
 
     valid_shifts = ['right', 'left', 'any']
 
     def __init__(self, max_shift_ratio: float, shift_direction: str = 'any'):
+        super(ShiftTime, self).__init__()
         assert 1 > max_shift_ratio >= 0, f'max_shift_ratio has to be between [0,1], but was: {max_shift_ratio}.'
         assert shift_direction.lower() in self.valid_shifts, f'shift_direction has to be one of: {self.valid_shifts}'
         self.max_shift_ratio = max_shift_ratio
         self.shift_direction = shift_direction.lower()
 
-    def __call__(self, x: np.ndarray):
+    def __call__(self, x):
         if self.max_shift_ratio:
-            shift = np.random.randint(max(int(self.max_shift_ratio * x.shape[-1]), 1))
+            shift = torch.randint(max(int(self.max_shift_ratio * x.shape[-1]), 1), (1,)).item()
             if self.shift_direction == 'right':
                 shift = -1 * shift
             elif self.shift_direction == 'any':
-                direction = np.random.choice([1, -1], 1)
+                # The ugly pytorch alternative
+                # direction = [-1, 1][torch.multinomial(torch.as_tensor([1, 2]).float(), 1).item()]
+                direction = np.asscalar(np.random.choice([1, -1], 1))
                 shift = direction * shift
-            augmented_data = np.roll(x, shift)
+            augmented_data = torch.roll(x, shift, dims=-1)
             # Set to silence for heading/ tailing
-            shift = int(shift)
             if shift > 0:
                 augmented_data[:shift, :] = 0
             else:
@@ -67,12 +70,13 @@ class ShiftTime(object):
             return x
 
 
-class MaskAug(object):
+class MaskAug(_BaseTransformation):
 
     w_idx = -1
     h_idx = -2
 
     def __init__(self, duration_ratio_max=0.3, mask_with_noise=True):
+        super(MaskAug, self).__init__()
         assertion = f'"duration_ratio" has to be within [0..1], but was: {duration_ratio_max}'
         if isinstance(duration_ratio_max, (tuple, list)):
             assert all([0 < max_val < 1 for max_val in duration_ratio_max]), assertion
@@ -85,15 +89,20 @@ class MaskAug(object):
             else (duration_ratio_max, duration_ratio_max)
 
     def __call__(self, x):
+        assert x.ndim == 3, "This function was made to wotk with two-dimensional inputs"
         for dim in (self.w_idx, self.h_idx):
             if self.duration_ratio_max[dim]:
-                start = int(np.random.choice(x.shape[dim], 1))
+                if dim == self.w_idx and x.shape[dim] == 0:
-                v_max = x.shape[dim] * self.duration_ratio_max[dim]
+                    print(x)
-                size = int(np.random.randint(0, v_max, 1))
+                start = np.asscalar(np.random.choice(x.shape[dim], 1))
+                v_max = int(x.shape[dim] * self.duration_ratio_max[dim])
+                size = torch.randint(0, v_max, (1,)).item()
                 end = int(min(start + size, x.shape[dim]))
                 size = end - start
                 if dim == self.w_idx:
-                    x[:, start:end] = np.random.random((x.shape[self.h_idx], size)) if self.mask_with_noise else 0
+                    mask = torch.randn(size=(x.shape[self.h_idx], size), device=x.device) if self.mask_with_noise else 0
+                    x[:, :, start:end] = mask
                 else:
-                    x[start:end, :] = np.random.random((size, x.shape[self.w_idx])) if self.mask_with_noise else 0
+                    mask = torch.randn((size, x.shape[self.w_idx]), device=x.device) if self.mask_with_noise else 0
+                    x[:, start:end, :] = mask
         return x

audio_toolset/mel_dataset.py

@@ -1,30 +1,40 @@
+import time
 from pathlib import Path
 
-import numpy as np
+import pickle
 from torch.utils.data import Dataset
 
+from ml_lib.modules.util import AutoPadToShape
+
 
 class TorchMelDataset(Dataset):
-    def __init__(self, identifier, mel_path, segment_len, hop_len, label, padding=0, transform=None):
+    def __init__(self, mel_path, sub_segment_len, sub_segment_hop_len, label, audio_file_len,
-        self.padding = padding
+                 sampling_rate, mel_hop_len, n_mels, transform=None, auto_pad_to_shape=True):
-        self.path = next(iter(Path(mel_path).glob(f'{identifier}_*')))
+        super(TorchMelDataset, self).__init__()
-        self.segment_len = segment_len
+        self.sampling_rate = sampling_rate
-        self.m, self.n = str(self.path).split('_')[-2:]  # get spectrogram dimensions
+        self.audio_file_len = audio_file_len
-        self.n = int(self.n.split('.', 1)[0])  # remove .npy
+        self.padding = AutoPadToShape((1, n_mels , sub_segment_len)) if auto_pad_to_shape else None
-        self.m, self.n = (int(i) for i in (self.m, self.n))
+        self.path = Path(mel_path)
-        self.offsets = list(range(0, self.n - segment_len, hop_len))
+        self.sub_segment_len = sub_segment_len
+        self.mel_hop_len = mel_hop_len
+        self.sub_segment_hop_len = sub_segment_hop_len
+        self.n = int((self.sampling_rate / self.mel_hop_len) * self.audio_file_len + 1)
+        self.offsets = list(range(0, self.n - self.sub_segment_len, self.sub_segment_hop_len))
         self.label = label
         self.transform = transform
 
     def __getitem__(self, item):
+        while Path(str(self.path).replace(self.path.suffix, '.lock')).exists():
+            time.sleep(0.01)
+        with self.path.open('rb') as mel_file:
+            mel_spec = pickle.load(mel_file, fix_imports=True)
         start = self.offsets[item]
-        mel_spec = np.load(str(self.path), allow_pickle=True)
+        snippet = mel_spec[:, : , start: start + self.sub_segment_len]
-        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)
+        if self.padding:
+            snippet = self.padding(snippet)
         return snippet, self.label
 
     def __len__(self):
-        return len(self.offsets)
+        return len(self.offsets)

modules/util.py

@@ -44,6 +44,9 @@ try:
         def size(self):
             return self.shape
 
+        def additional_scores(self, outputs):
+            raise NotImplementedError
+
         @property
         def dataset_class(self):
             try:

utils/transforms.py

@@ -1,6 +1,19 @@
+from abc import ABC
 from torchvision.transforms import ToTensor as TorchVisionToTensor
 
 
+class _BaseTransformation(ABC):
+
+    def __init__(self, *args):
+        pass
+
+    def __repr__(self):
+        return f'{self.__class__.__name__}({self.__dict__})'
+
+    def __call__(self, *args, **kwargs):
+        raise NotImplementedError
+
+
 class ToTensor(TorchVisionToTensor):
 
     def __call__(self, pic):