(self, img_paths, image_size, offload_video_to_cpu, img_mean, img_std)
| 107 | """ |
| 108 | |
| 109 | def __init__(self, img_paths, image_size, offload_video_to_cpu, img_mean, img_std): |
| 110 | self.img_paths = img_paths |
| 111 | self.image_size = image_size |
| 112 | self.offload_video_to_cpu = offload_video_to_cpu |
| 113 | self.img_mean = img_mean |
| 114 | self.img_std = img_std |
| 115 | # items in `self._images` will be loaded asynchronously |
| 116 | self.images = [None] * len(img_paths) |
| 117 | # catch and raise any exceptions in the async loading thread |
| 118 | self.exception = None |
| 119 | # video_height and video_width be filled when loading the first image |
| 120 | self.video_height = None |
| 121 | self.video_width = None |
| 122 | |
| 123 | # load the first frame to fill video_height and video_width and also |
| 124 | # to cache it (since it's most likely where the user will click) |
| 125 | self.__getitem__(0) |
| 126 | |
| 127 | # load the rest of frames asynchronously without blocking the session start |
| 128 | def _load_frames(): |
| 129 | try: |
| 130 | for n in tqdm(range(len(self.images)), desc="frame loading (JPEG)"): |
| 131 | self.__getitem__(n) |
| 132 | except Exception as e: |
| 133 | self.exception = e |
| 134 | |
| 135 | self.thread = Thread(target=_load_frames, daemon=True) |
| 136 | self.thread.start() |
| 137 | |
| 138 | def __getitem__(self, index): |
| 139 | if self.exception is not None: |
nothing calls this directly
no test coverage detected