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# Copyright (c) ByteDance, Inc. and its affiliates.
# Copyright (c) Chutong Meng
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
# Based on fairseq (https://github.com/facebookresearch/fairseq)
import logging
import fairseq
import torch
import torch.nn.functional as F
from fairseq.data.audio.audio_utils import get_features_or_waveform
logger = logging.getLogger("dump_feature")
class HubertFeatureReader(object):
def __init__(self, ckpt_path: str, layer: int, device: str, max_chunk=1600000):
(
model,
cfg,
task,
) = fairseq.checkpoint_utils.load_model_ensemble_and_task([ckpt_path])
self.device = device
logger.info(f"device = {self.device}")
self.model = model[0].eval().to(self.device)
self.task = task
self.layer = layer
self.max_chunk = max_chunk
logger.info(f"TASK CONFIG:\n{self.task.cfg}")
logger.info(f" max_chunk = {self.max_chunk}")
def read_audio(self, path, ref_len=None):
wav = get_features_or_waveform(path, need_waveform=True, use_sample_rate=self.task.cfg.sample_rate)
if wav.ndim == 2:
wav = wav.mean(-1)
assert wav.ndim == 1, wav.ndim
if ref_len is not None and abs(ref_len - len(wav)) > 160:
logger.warning(f"ref {ref_len} != read {len(wav)} ({path})")
return wav
def get_feats(self, path, ref_len=None):
x = self.read_audio(path, ref_len=ref_len)
with torch.no_grad():
x = torch.from_numpy(x).float().to(self.device)
if self.task.cfg.normalize:
x = F.layer_norm(x, x.shape)
x = x.view(1, -1)
feat = []
for start in range(0, x.size(1), self.max_chunk):
x_chunk = x[:, start: start + self.max_chunk]
feat_chunk, _ = self.model.extract_features(
source=x_chunk,
padding_mask=None,
mask=False,
output_layer=self.layer,
)
feat.append(feat_chunk)
return torch.cat(feat, 1).squeeze(0)
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