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Running
on
Zero
Running
on
Zero
File size: 1,839 Bytes
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# Copyright (c) 2021 Mobvoi Inc. (authors: Binbin Zhang)
# 2024 Alibaba Inc (authors: Xiang Lyu)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import json
import torchaudio
def read_lists(list_file):
lists = []
with open(list_file, 'r', encoding='utf8') as fin:
for line in fin:
lists.append(line.strip())
return lists
def read_json_lists(list_file):
lists = read_lists(list_file)
results = {}
for fn in lists:
with open(fn, 'r', encoding='utf8') as fin:
results.update(json.load(fin))
return results
def load_wav(wav, target_sr):
speech, sample_rate = torchaudio.load(wav)
speech = speech.mean(dim=0, keepdim=True)
if sample_rate != target_sr:
assert sample_rate > target_sr, 'wav sample rate {} must be greater than {}'.format(sample_rate, target_sr)
speech = torchaudio.transforms.Resample(orig_freq=sample_rate, new_freq=target_sr)(speech)
return speech
def speed_change(waveform, sample_rate, speed_factor: str):
effects = [
["tempo", speed_factor], # speed_factor
["rate", f"{sample_rate}"]
]
augmented_waveform, new_sample_rate = torchaudio.sox_effects.apply_effects_tensor(
waveform,
sample_rate,
effects
)
return augmented_waveform, new_sample_rate
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