benchmarks/rnnt/ootb/inference/pytorch/parts/segment.py [107:170]:
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    @property
    def samples(self):
        return self._samples.copy()

    @property
    def sample_rate(self):
        return self._sample_rate

    @property
    def num_samples(self):
        return self._samples.shape[0]

    @property
    def duration(self):
        return self._samples.shape[0] / float(self._sample_rate)

    @property
    def rms_db(self):
        mean_square = np.mean(self._samples ** 2)
        return 10 * np.log10(mean_square)

    def gain_db(self, gain):
        self._samples *= 10. ** (gain / 20.)

    def pad(self, pad_size, symmetric=False):
        """Add zero padding to the sample. The pad size is given in number of samples.
        If symmetric=True, `pad_size` will be added to both sides. If false, `pad_size`
        zeros will be added only to the end.
        """
        self._samples = np.pad(self._samples,
                               (pad_size if symmetric else 0, pad_size),
                               mode='constant')

    def subsegment(self, start_time=None, end_time=None):
        """Cut the AudioSegment between given boundaries.
        Note that this is an in-place transformation.
        :param start_time: Beginning of subsegment in seconds.
        :type start_time: float
        :param end_time: End of subsegment in seconds.
        :type end_time: float
        :raise ValueError: If start_time or end_time is incorrectly set, e.g. out
                                             of bounds in time.
        """
        start_time = 0.0 if start_time is None else start_time
        end_time = self.duration if end_time is None else end_time
        if start_time < 0.0:
            start_time = self.duration + start_time
        if end_time < 0.0:
            end_time = self.duration + end_time
        if start_time < 0.0:
            raise ValueError("The slice start position (%f s) is out of "
                             "bounds." % start_time)
        if end_time < 0.0:
            raise ValueError("The slice end position (%f s) is out of bounds." %
                             end_time)
        if start_time > end_time:
            raise ValueError("The slice start position (%f s) is later than "
                             "the end position (%f s)." % (start_time, end_time))
        if end_time > self.duration:
            raise ValueError("The slice end position (%f s) is out of bounds "
                             "(> %f s)" % (end_time, self.duration))
        start_sample = int(round(start_time * self._sample_rate))
        end_sample = int(round(end_time * self._sample_rate))
        self._samples = self._samples[start_sample:end_sample]
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benchmarks/rnnt/ootb/train/common/audio.py [118:184]:
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    @property
    def samples(self):
        return self._samples.copy()

    @property
    def sample_rate(self):
        return self._sample_rate

    @property
    def num_samples(self):
        return self._samples.shape[0]

    @property
    def duration(self):
        return self._samples.shape[0] / float(self._sample_rate)

    @property
    def rms_db(self):
        mean_square = np.mean(self._samples ** 2)
        return 10 * np.log10(mean_square)

    def gain_db(self, gain):
        self._samples *= 10. ** (gain / 20.)

    def pad(self, pad_size, symmetric=False):
        """Add zero padding to the sample.

        The pad size is given in number of samples. If symmetric=True,
        `pad_size` will be added to both sides. If false, `pad_size` zeros
        will be added only to the end.
        """
        self._samples = np.pad(self._samples,
                               (pad_size if symmetric else 0, pad_size),
                               mode='constant')

    def subsegment(self, start_time=None, end_time=None):
        """Cut the AudioSegment between given boundaries.

        Note that this is an in-place transformation.
        :param start_time: Beginning of subsegment in seconds.
        :type start_time: float
        :param end_time: End of subsegment in seconds.
        :type end_time: float
        :raise ValueError: If start_time or end_time is incorrectly set, e.g. out
                                             of bounds in time.
        """
        start_time = 0.0 if start_time is None else start_time
        end_time = self.duration if end_time is None else end_time
        if start_time < 0.0:
            start_time = self.duration + start_time
        if end_time < 0.0:
            end_time = self.duration + end_time
        if start_time < 0.0:
            raise ValueError("The slice start position (%f s) is out of "
                             "bounds." % start_time)
        if end_time < 0.0:
            raise ValueError("The slice end position (%f s) is out of bounds." %
                             end_time)
        if start_time > end_time:
            raise ValueError("The slice start position (%f s) is later than "
                             "the end position (%f s)." % (start_time, end_time))
        if end_time > self.duration:
            raise ValueError("The slice end position (%f s) is out of bounds "
                             "(> %f s)" % (end_time, self.duration))
        start_sample = int(round(start_time * self._sample_rate))
        end_sample = int(round(end_time * self._sample_rate))
        self._samples = self._samples[start_sample:end_sample]
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