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35 lines
1.1 KiB
35 lines
1.1 KiB
8 years ago
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"""Contains the volume perturb augmentation model."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from data_utils.augmentor.base import AugmentorBase
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class ShiftPerturbAugmentor(AugmentorBase):
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"""Augmentation model for adding random shift perturbation.
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:param rng: Random generator object.
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:type rng: random.Random
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:param min_shift_ms: Minimal shift in milliseconds.
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:type min_shift_ms: float
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:param max_shift_ms: Maximal shift in milliseconds.
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:type max_shift_ms: float
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"""
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def __init__(self, rng, min_shift_ms, max_shift_ms):
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self._min_shift_ms = min_shift_ms
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self._max_shift_ms = max_shift_ms
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self._rng = rng
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def transform_audio(self, audio_segment):
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"""Shift audio.
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Note that this is an in-place transformation.
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:param audio_segment: Audio segment to add effects to.
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:type audio_segment: AudioSegmenet|SpeechSegment
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"""
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shift_ms = self._rng.uniform(self._min_shift_ms, self._max_shift_ms)
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audio_segment.shift(shift_ms)
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