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import logging |
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import os |
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import sys |
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import io |
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import numpy as np |
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import torch |
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import torch.nn.functional as F |
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from .. import FairseqDataset |
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from ..data_utils import compute_mask_indices, get_buckets, get_bucketed_sizes |
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from fairseq.data.audio.audio_utils import ( |
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parse_path, |
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read_from_stored_zip, |
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is_sf_audio_data, |
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) |
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from fairseq.data.text_compressor import TextCompressor, TextCompressionLevel |
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logger = logging.getLogger(__name__) |
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class RawAudioDataset(FairseqDataset): |
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def __init__( |
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self, |
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sample_rate, |
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max_sample_size=None, |
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min_sample_size=0, |
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shuffle=True, |
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pad=False, |
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normalize=False, |
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compute_mask_indices=False, |
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**mask_compute_kwargs, |
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): |
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super().__init__() |
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self.sample_rate = sample_rate |
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self.sizes = [] |
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self.max_sample_size = ( |
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max_sample_size if max_sample_size is not None else sys.maxsize |
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) |
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self.min_sample_size = min_sample_size |
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self.pad = pad |
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self.shuffle = shuffle |
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self.normalize = normalize |
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self.compute_mask_indices = compute_mask_indices |
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if self.compute_mask_indices: |
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self.mask_compute_kwargs = mask_compute_kwargs |
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self._features_size_map = {} |
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self._C = mask_compute_kwargs["encoder_embed_dim"] |
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self._conv_feature_layers = eval(mask_compute_kwargs["conv_feature_layers"]) |
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def __getitem__(self, index): |
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raise NotImplementedError() |
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def __len__(self): |
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return len(self.sizes) |
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def postprocess(self, feats, curr_sample_rate): |
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if feats.dim() == 2: |
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feats = feats.mean(-1) |
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if curr_sample_rate != self.sample_rate: |
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raise Exception(f"sample rate: {curr_sample_rate}, need {self.sample_rate}") |
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assert feats.dim() == 1, feats.dim() |
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if self.normalize: |
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with torch.no_grad(): |
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feats = F.layer_norm(feats, feats.shape) |
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return feats |
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def crop_to_max_size(self, wav, target_size): |
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size = len(wav) |
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diff = size - target_size |
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if diff <= 0: |
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return wav |
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start = np.random.randint(0, diff + 1) |
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end = size - diff + start |
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return wav[start:end] |
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def _compute_mask_indices(self, dims, padding_mask): |
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B, T, C = dims |
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mask_indices, mask_channel_indices = None, None |
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if self.mask_compute_kwargs["mask_prob"] > 0: |
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mask_indices = compute_mask_indices( |
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(B, T), |
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padding_mask, |
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self.mask_compute_kwargs["mask_prob"], |
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self.mask_compute_kwargs["mask_length"], |
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self.mask_compute_kwargs["mask_selection"], |
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self.mask_compute_kwargs["mask_other"], |
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min_masks=2, |
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no_overlap=self.mask_compute_kwargs["no_mask_overlap"], |
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min_space=self.mask_compute_kwargs["mask_min_space"], |
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) |
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mask_indices = torch.from_numpy(mask_indices) |
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if self.mask_compute_kwargs["mask_channel_prob"] > 0: |
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mask_channel_indices = compute_mask_indices( |
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(B, C), |
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None, |
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self.mask_compute_kwargs["mask_channel_prob"], |
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self.mask_compute_kwargs["mask_channel_length"], |
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self.mask_compute_kwargs["mask_channel_selection"], |
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self.mask_compute_kwargs["mask_channel_other"], |
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no_overlap=self.mask_compute_kwargs["no_mask_channel_overlap"], |
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min_space=self.mask_compute_kwargs["mask_channel_min_space"], |
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) |
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mask_channel_indices = ( |
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torch.from_numpy(mask_channel_indices).unsqueeze(1).expand(-1, T, -1) |
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) |
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return mask_indices, mask_channel_indices |
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@staticmethod |
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def _bucket_tensor(tensor, num_pad, value): |
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return F.pad(tensor, (0, num_pad), value=value) |
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def collater(self, samples): |
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samples = [s for s in samples if s["source"] is not None] |
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if len(samples) == 0: |
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return {} |
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sources = [s["source"] for s in samples] |
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sizes = [len(s) for s in sources] |
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if self.pad: |
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target_size = min(max(sizes), self.max_sample_size) |
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else: |
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target_size = min(min(sizes), self.max_sample_size) |
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collated_sources = sources[0].new_zeros(len(sources), target_size) |
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padding_mask = ( |
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torch.BoolTensor(collated_sources.shape).fill_(False) if self.pad else None |
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) |
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for i, (source, size) in enumerate(zip(sources, sizes)): |
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diff = size - target_size |
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if diff == 0: |
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collated_sources[i] = source |
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elif diff < 0: |
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assert self.pad |
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collated_sources[i] = torch.cat( |
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[source, source.new_full((-diff,), 0.0)] |
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) |
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padding_mask[i, diff:] = True |
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else: |
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collated_sources[i] = self.crop_to_max_size(source, target_size) |
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input = {"source": collated_sources} |
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out = {"id": torch.LongTensor([s["id"] for s in samples])} |
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if self.pad: |
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input["padding_mask"] = padding_mask |
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if hasattr(self, "num_buckets") and self.num_buckets > 0: |
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assert self.pad, "Cannot bucket without padding first." |
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bucket = max(self._bucketed_sizes[s["id"]] for s in samples) |
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num_pad = bucket - collated_sources.size(-1) |
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if num_pad: |
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input["source"] = self._bucket_tensor(collated_sources, num_pad, 0) |
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input["padding_mask"] = self._bucket_tensor(padding_mask, num_pad, True) |
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if self.compute_mask_indices: |
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B = input["source"].size(0) |
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T = self._get_mask_indices_dims(input["source"].size(-1)) |
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padding_mask_reshaped = input["padding_mask"].clone() |
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extra = padding_mask_reshaped.size(1) % T |
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if extra > 0: |
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padding_mask_reshaped = padding_mask_reshaped[:, :-extra] |
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padding_mask_reshaped = padding_mask_reshaped.view( |
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padding_mask_reshaped.size(0), T, -1 |
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) |
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padding_mask_reshaped = padding_mask_reshaped.all(-1) |
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input["padding_count"] = padding_mask_reshaped.sum(-1).max().item() |
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mask_indices, mask_channel_indices = self._compute_mask_indices( |
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(B, T, self._C), |
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padding_mask_reshaped, |
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) |
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input["mask_indices"] = mask_indices |
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input["mask_channel_indices"] = mask_channel_indices |
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out["sample_size"] = mask_indices.sum().item() |
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out["net_input"] = input |
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return out |
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def _get_mask_indices_dims(self, size, padding=0, dilation=1): |
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if size not in self._features_size_map: |
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L_in = size |
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for (_, kernel_size, stride) in self._conv_feature_layers: |
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L_out = L_in + 2 * padding - dilation * (kernel_size - 1) - 1 |
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L_out = 1 + L_out // stride |
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L_in = L_out |
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self._features_size_map[size] = L_out |
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return self._features_size_map[size] |
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def num_tokens(self, index): |
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return self.size(index) |
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def size(self, index): |
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"""Return an example's size as a float or tuple. This value is used when |
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filtering a dataset with ``--max-positions``.""" |
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if self.pad: |
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return self.sizes[index] |
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return min(self.sizes[index], self.max_sample_size) |
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def ordered_indices(self): |
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"""Return an ordered list of indices. Batches will be constructed based |
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on this order.""" |
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if self.shuffle: |
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order = [np.random.permutation(len(self))] |
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order.append( |
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np.minimum( |
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np.array(self.sizes), |
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self.max_sample_size, |
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) |
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) |
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return np.lexsort(order)[::-1] |
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else: |
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return np.arange(len(self)) |
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def set_bucket_info(self, num_buckets): |
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self.num_buckets = num_buckets |
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if self.num_buckets > 0: |
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self._collated_sizes = np.minimum( |
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np.array(self.sizes), |
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self.max_sample_size, |
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) |
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self.buckets = get_buckets( |
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self._collated_sizes, |
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self.num_buckets, |
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) |
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self._bucketed_sizes = get_bucketed_sizes( |
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self._collated_sizes, self.buckets |
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) |
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logger.info( |
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f"{len(self.buckets)} bucket(s) for the audio dataset: " |
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f"{self.buckets}" |
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) |
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class FileAudioDataset(RawAudioDataset): |
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def __init__( |
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self, |
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manifest_path, |
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sample_rate, |
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max_sample_size=None, |
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min_sample_size=0, |
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shuffle=True, |
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pad=False, |
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normalize=False, |
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num_buckets=0, |
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compute_mask_indices=False, |
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text_compression_level=TextCompressionLevel.none, |
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**mask_compute_kwargs, |
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): |
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super().__init__( |
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sample_rate=sample_rate, |
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max_sample_size=max_sample_size, |
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min_sample_size=min_sample_size, |
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shuffle=shuffle, |
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pad=pad, |
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normalize=normalize, |
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compute_mask_indices=compute_mask_indices, |
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**mask_compute_kwargs, |
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) |
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self.text_compressor = TextCompressor(level=text_compression_level) |
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skipped = 0 |
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self.fnames = [] |
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sizes = [] |
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self.skipped_indices = set() |
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with open(manifest_path, "r") as f: |
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self.root_dir = f.readline().strip() |
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for i, line in enumerate(f): |
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items = line.strip().split("\t") |
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assert len(items) == 2, line |
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sz = int(items[1]) |
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if min_sample_size is not None and sz < min_sample_size: |
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skipped += 1 |
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self.skipped_indices.add(i) |
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continue |
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self.fnames.append(self.text_compressor.compress(items[0])) |
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sizes.append(sz) |
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logger.info(f"loaded {len(self.fnames)}, skipped {skipped} samples") |
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self.sizes = np.array(sizes, dtype=np.int64) |
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try: |
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import pyarrow |
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self.fnames = pyarrow.array(self.fnames) |
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except: |
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logger.debug( |
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"Could not create a pyarrow array. Please install pyarrow for better performance" |
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) |
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pass |
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self.set_bucket_info(num_buckets) |
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def __getitem__(self, index): |
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import soundfile as sf |
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fn = self.fnames[index] |
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fn = fn if isinstance(self.fnames, list) else fn.as_py() |
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fn = self.text_compressor.decompress(fn) |
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path_or_fp = os.path.join(self.root_dir, fn) |
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_path, slice_ptr = parse_path(path_or_fp) |
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if len(slice_ptr) == 2: |
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byte_data = read_from_stored_zip(_path, slice_ptr[0], slice_ptr[1]) |
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assert is_sf_audio_data(byte_data) |
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path_or_fp = io.BytesIO(byte_data) |
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wav, curr_sample_rate = sf.read(path_or_fp, dtype="float32") |
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feats = torch.from_numpy(wav).float() |
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feats = self.postprocess(feats, curr_sample_rate) |
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return {"id": index, "source": feats} |
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class BinarizedAudioDataset(RawAudioDataset): |
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def __init__( |
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self, |
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data_dir, |
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split, |
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sample_rate, |
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max_sample_size=None, |
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min_sample_size=0, |
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shuffle=True, |
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pad=False, |
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normalize=False, |
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num_buckets=0, |
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compute_mask_indices=False, |
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**mask_compute_kwargs, |
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): |
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super().__init__( |
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sample_rate=sample_rate, |
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max_sample_size=max_sample_size, |
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min_sample_size=min_sample_size, |
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shuffle=shuffle, |
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pad=pad, |
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normalize=normalize, |
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compute_mask_indices=compute_mask_indices, |
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**mask_compute_kwargs, |
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) |
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from fairseq.data import data_utils, Dictionary |
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self.fnames_dict = Dictionary.load(os.path.join(data_dir, "dict.txt")) |
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root_path = os.path.join(data_dir, f"{split}.root") |
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if os.path.exists(root_path): |
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with open(root_path, "r") as f: |
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self.root_dir = next(f).strip() |
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else: |
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self.root_dir = None |
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fnames_path = os.path.join(data_dir, split) |
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self.fnames = data_utils.load_indexed_dataset(fnames_path, self.fnames_dict) |
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lengths_path = os.path.join(data_dir, f"{split}.lengths") |
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with open(lengths_path, "r") as f: |
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for line in f: |
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sz = int(line.rstrip()) |
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assert ( |
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sz >= min_sample_size |
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), f"Min sample size is not supported for binarized dataset, but found a sample with size {sz}" |
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self.sizes.append(sz) |
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self.sizes = np.array(self.sizes, dtype=np.int64) |
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self.set_bucket_info(num_buckets) |
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logger.info(f"loaded {len(self.fnames)} samples") |
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def __getitem__(self, index): |
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import soundfile as sf |
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fname = self.fnames_dict.string(self.fnames[index], separator="") |
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if self.root_dir: |
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fname = os.path.join(self.root_dir, fname) |
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wav, curr_sample_rate = sf.read(fname) |
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feats = torch.from_numpy(wav).float() |
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feats = self.postprocess(feats, curr_sample_rate) |
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return {"id": index, "source": feats} |
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