import torch
from torch.nn.utils.rnn import pad_sequence


def slice_padding_fbank(speech, speech_lengths, vad_segments):
    speech_list = []
    speech_lengths_list = []
    for i, segment in enumerate(vad_segments):

        bed_idx = int(segment[0][0] * 16)
        end_idx = min(int(segment[0][1] * 16), speech_lengths[0])
        speech_i = speech[0, bed_idx:end_idx]
        speech_lengths_i = end_idx - bed_idx
        speech_list.append(speech_i)
        speech_lengths_list.append(speech_lengths_i)
    feats_pad = pad_sequence(speech_list, batch_first=True, padding_value=0.0)
    speech_lengths_pad = torch.Tensor(speech_lengths_list).int()
    return feats_pad, speech_lengths_pad


def slice_padding_audio_samples(speech, speech_lengths, vad_segments):
    speech_list = []
    speech_lengths_list = []
    for i, segment in enumerate(vad_segments):
        bed_idx = int(segment[0][0] * 16)
        end_idx = min(int(segment[0][1] * 16), speech_lengths)
        speech_i = speech[bed_idx:end_idx]
        speech_lengths_i = end_idx - bed_idx
        speech_list.append(speech_i)
        speech_lengths_list.append(speech_lengths_i)

    return speech_list, speech_lengths_list