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| # Copyright 2022 The OFA-Sys Team. | |
| # All rights reserved. | |
| # This source code is licensed under the Apache 2.0 license | |
| # found in the LICENSE file in the root directory. | |
| import logging | |
| import re | |
| import torch.utils.data | |
| from fairseq.data import FairseqDataset | |
| logger = logging.getLogger(__name__) | |
| class OFADataset(FairseqDataset): | |
| def __init__(self, split, dataset, bpe, src_dict, tgt_dict): | |
| self.split = split | |
| self.dataset = dataset | |
| self.bpe = bpe | |
| self.src_dict = src_dict | |
| self.tgt_dict = tgt_dict | |
| self.bos = src_dict.bos() | |
| self.eos = src_dict.eos() | |
| self.pad = src_dict.pad() | |
| self.bos_item = torch.LongTensor([self.bos]) | |
| self.eos_item = torch.LongTensor([self.eos]) | |
| def __len__(self): | |
| return len(self.dataset) | |
| def encode_text(self, text, length=None, append_bos=False, append_eos=False, use_bpe=True): | |
| s = self.tgt_dict.encode_line( | |
| line=self.bpe.encode(text) if use_bpe else text, | |
| add_if_not_exist=False, | |
| append_eos=False | |
| ).long() | |
| if length is not None: | |
| s = s[:length] | |
| if append_bos: | |
| s = torch.cat([self.bos_item, s]) | |
| if append_eos: | |
| s = torch.cat([s, self.eos_item]) | |
| return s | |
| def pre_question(self, question, max_ques_words=None): | |
| question = question.lower().lstrip(",.!?*#:;~").replace('-', ' ').replace('/', ' ') | |
| question = re.sub( | |
| r"\s{2,}", | |
| ' ', | |
| question, | |
| ) | |
| question = question.rstrip('\n') | |
| question = question.strip(' ') | |
| # truncate question | |
| question_words = question.split(' ') | |
| if max_ques_words is not None and len(question_words) > max_ques_words: | |
| question = ' '.join(question_words[:max_ques_words]) | |
| return question | |
| def pre_caption(self, caption, max_words=None): | |
| caption = caption.lower().lstrip(",.!?*#:;~").replace('-', ' ').replace('/', ' ').replace('<person>', 'person') | |
| caption = re.sub( | |
| r"\s{2,}", | |
| ' ', | |
| caption, | |
| ) | |
| caption = caption.rstrip('\n') | |
| caption = caption.strip(' ') | |
| # truncate caption | |
| caption_words = caption.split(' ') | |
| if max_words is not None and len(caption_words) > max_words: | |
| caption = ' '.join(caption_words[:max_words]) | |
| return caption | |