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dataloader_lsmdc_retrieval.py
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dataloader_lsmdc_retrieval.py
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from __future__ import absolute_import
from __future__ import division
from __future__ import unicode_literals
from __future__ import print_function
import os
from torch.utils.data import Dataset
import numpy as np
import json
import math
from dataloaders.rawvideo_util import RawVideoExtractor
class LSMDC_DataLoader(Dataset):
"""LSMDC dataset loader."""
def __init__(
self,
subset,
data_path,
features_path,
tokenizer,
max_words=30,
feature_framerate=1.0,
max_frames=100,
image_resolution=224,
frame_order=0,
slice_framepos=0,
):
self.data_path = data_path
self.features_path = features_path
self.feature_framerate = feature_framerate
self.max_words = max_words
self.max_frames = max_frames
self.tokenizer = tokenizer
# 0: ordinary order; 1: reverse order; 2: random order.
self.frame_order = frame_order
assert self.frame_order in [0, 1, 2]
# 0: cut from head frames; 1: cut from tail frames; 2: extract frames uniformly.
self.slice_framepos = slice_framepos
assert self.slice_framepos in [0, 1, 2]
self.subset = subset
assert self.subset in ["train", "val", "test"]
video_json_path_dict = {}
video_json_path_dict["train"] = os.path.join(self.data_path, "LSMDC16_annos_training.csv")
video_json_path_dict["val"] = os.path.join(self.data_path, "LSMDC16_annos_val.csv")
video_json_path_dict["test"] = os.path.join(self.data_path, "LSMDC16_challenge_1000_publictect.csv")
# <CLIP_ID>\t<START_ALIGNED>\t<END_ALIGNED>\t<START_EXTRACTED>\t<END_EXTRACTED>\t<SENTENCE>
# <CLIP_ID> is not a unique identifier, i.e. the same <CLIP_ID> can be associated with multiple sentences.
# However, LSMDC16_challenge_1000_publictect.csv has no repeat instances
video_id_list = []
caption_dict = {}
with open(video_json_path_dict[self.subset], 'r') as fp:
for line in fp:
line = line.strip()
line_split = line.split("\t")
assert len(line_split) == 6
clip_id, start_aligned, end_aligned, start_extracted, end_extracted, sentence = line_split
caption_dict[len(caption_dict)] = (clip_id, sentence)
if clip_id not in video_id_list: video_id_list.append(clip_id)
video_dict = {}
for root, dub_dir, video_files in os.walk(self.features_path):
for video_file in video_files:
video_id_ = ".".join(video_file.split(".")[:-1])
if video_id_ not in video_id_list:
continue
file_path_ = os.path.join(root, video_file)
video_dict[video_id_] = file_path_
self.video_dict = video_dict
# Get all captions
self.iter2video_pairs_dict = {}
for clip_id, sentence in caption_dict.values():
if clip_id not in self.video_dict:
continue
self.iter2video_pairs_dict[len(self.iter2video_pairs_dict)] = (clip_id, sentence)
self.rawVideoExtractor = RawVideoExtractor(framerate=feature_framerate, size=image_resolution)
self.SPECIAL_TOKEN = {"CLS_TOKEN": "<|startoftext|>", "SEP_TOKEN": "<|endoftext|>",
"MASK_TOKEN": "[MASK]", "UNK_TOKEN": "[UNK]", "PAD_TOKEN": "[PAD]"}
def __len__(self):
return len(self.iter2video_pairs_dict)
def _get_video_id_from_pseduo(self, pseudo_video_id):
video_id = pseudo_video_id[2:]
return video_id
def _get_video_id_single(self, path):
pseudo_video_id_list = []
video_id_list = []
print('Loading json: {}'.format(path))
with open(path, 'r') as f:
json_data = json.load(f)
for pseudo_video_id in json_data:
if pseudo_video_id in pseudo_video_id_list:
print("reduplicate.")
else:
video_id = self._get_video_id_from_pseduo(pseudo_video_id)
pseudo_video_id_list.append(pseudo_video_id)
video_id_list.append(video_id)
return pseudo_video_id_list, video_id_list
def _get_captions_single(self, path):
pseudo_caption_dict = {}
with open(path, 'r') as f:
json_data = json.load(f)
for pseudo_video_id, v_ in json_data.items():
pseudo_caption_dict[pseudo_video_id] = {}
timestamps = v_["timestamps"]
pseudo_caption_dict[pseudo_video_id]["start"] = \
np.array([int(math.floor(float(itm[0]))) for itm in timestamps], dtype=object)
pseudo_caption_dict[pseudo_video_id]["end"] = \
np.array([int(math.ceil(float(itm[1]))) for itm in timestamps], dtype=object)
pseudo_caption_dict[pseudo_video_id]["text"] = np.array(v_["sentences"], dtype=object)
return pseudo_caption_dict
def _get_text(self, video_id, caption):
k = 1
choice_video_ids = [video_id]
pairs_text = np.zeros((k, self.max_words), dtype=np.long)
pairs_mask = np.zeros((k, self.max_words), dtype=np.long)
pairs_segment = np.zeros((k, self.max_words), dtype=np.long)
for i, video_id in enumerate(choice_video_ids):
words = self.tokenizer.tokenize(caption)
words = [self.SPECIAL_TOKEN["CLS_TOKEN"]] + words
total_length_with_CLS = self.max_words - 1
if len(words) > total_length_with_CLS:
words = words[:total_length_with_CLS]
words = words + [self.SPECIAL_TOKEN["SEP_TOKEN"]]
input_ids = self.tokenizer.convert_tokens_to_ids(words)
input_mask = [1] * len(input_ids)
segment_ids = [0] * len(input_ids)
while len(input_ids) < self.max_words:
input_ids.append(0)
input_mask.append(0)
segment_ids.append(0)
assert len(input_ids) == self.max_words
assert len(input_mask) == self.max_words
assert len(segment_ids) == self.max_words
pairs_text[i] = np.array(input_ids)
pairs_mask[i] = np.array(input_mask)
pairs_segment[i] = np.array(segment_ids)
return pairs_text, pairs_mask, pairs_segment, choice_video_ids
def _get_rawvideo(self, choice_video_ids):
video_mask = np.zeros((len(choice_video_ids), self.max_frames), dtype=np.long)
max_video_length = [0] * len(choice_video_ids)
# Pair x L x T x 3 x H x W
video = np.zeros((len(choice_video_ids), self.max_frames, 1, 3,
self.rawVideoExtractor.size, self.rawVideoExtractor.size), dtype=np.float)
try:
for i, video_id in enumerate(choice_video_ids):
video_path = self.video_dict[video_id]
raw_video_data = self.rawVideoExtractor.get_video_data(video_path)
raw_video_data = raw_video_data['video']
if len(raw_video_data.shape) > 3:
raw_video_data_clip = raw_video_data
# L x T x 3 x H x W
raw_video_slice = self.rawVideoExtractor.process_raw_data(raw_video_data_clip)
if self.max_frames < raw_video_slice.shape[0]:
if self.slice_framepos == 0:
video_slice = raw_video_slice[:self.max_frames, ...]
elif self.slice_framepos == 1:
video_slice = raw_video_slice[-self.max_frames:, ...]
else:
sample_indx = np.linspace(0, raw_video_slice.shape[0]-1, num=self.max_frames, dtype=int)
video_slice = raw_video_slice[sample_indx, ...]
else:
video_slice = raw_video_slice
video_slice = self.rawVideoExtractor.process_frame_order(video_slice, frame_order=self.frame_order)
slice_len = video_slice.shape[0]
max_video_length[i] = max_video_length[i] if max_video_length[i] > slice_len else slice_len
if slice_len < 1:
pass
else:
video[i][:slice_len, ...] = video_slice
else:
print("video path: {} error. video id: {}".format(video_path, video_id))
except Exception as excep:
print("Video ids: {}".format(choice_video_ids))
raise excep
for i, v_length in enumerate(max_video_length):
video_mask[i][:v_length] = [1] * v_length
return video, video_mask
def __getitem__(self, feature_idx):
clip_id, sentence = self.iter2video_pairs_dict[feature_idx]
pairs_text, pairs_mask, pairs_segment, choice_video_ids = self._get_text(clip_id, sentence)
video, video_mask = self._get_rawvideo(choice_video_ids)
return pairs_text, pairs_mask, pairs_segment, video, video_mask