| |
| """Load one public eight-frame simulation observation, without model/GPU usage.""" |
| import argparse,hashlib,io,json,tarfile |
| from pathlib import Path |
| import numpy as np |
| from PIL import Image |
| from schema import validate |
|
|
| def load(root,row): |
| validate(row);root=Path(root) |
| with tarfile.open(root/row['media_archive'],'r:') as archive: |
| member=archive.getmember(row['media_member']) |
| if not member.isfile() or member.name!=row['media_member']:raise ValueError('Unsafe tar member') |
| data=archive.extractfile(member).read() |
| if hashlib.sha256(data).hexdigest()!=row['media_sha256']:raise ValueError('Media SHA256 mismatch') |
| with np.load(io.BytesIO(data),allow_pickle=False) as arrays: |
| if set(arrays.files)!={f'f{i}' for i in range(8)}:raise ValueError('Unknown NPZ fields') |
| frames=[] |
| for i in range(8): |
| a=arrays[f'f{i}'] |
| if a.dtype!=np.uint8 or a.ndim!=1:raise ValueError('Unexpected encoded frame') |
| im=Image.open(io.BytesIO(a.tobytes()));im.load() |
| if list(reversed(im.size))!=row['hw']:raise ValueError('Frame dimensions differ') |
| frames.append(im.convert('RGB')) |
| return frames,row |
|
|
| def main(): |
| p=argparse.ArgumentParser(description=__doc__);p.add_argument('--root',type=Path,default=Path(__file__).resolve().parents[1]);p.add_argument('--split',choices=('train','heldout'),default='train');p.add_argument('--index',type=int,default=0);p.add_argument('--gif',type=Path);a=p.parse_args() |
| with (a.root/'data'/(a.split+'.jsonl')).open() as f: |
| row=next(json.loads(line) for n,line in enumerate(f) if n==a.index) |
| frames,row=load(a.root,row) |
| if a.gif: |
| if a.gif.exists():raise ValueError('Will not overwrite an existing user file') |
| frames[0].save(a.gif,save_all=True,append_images=frames[1:],duration=180,loop=0) |
| print(json.dumps({'sample_id':row['sample_id'],'frames':len(frames),'source':row['source_dataset'],'task':row['task'],'image_size':frames[0].size,'model_loaded':False},indent=2)) |
| if __name__=='__main__':main() |
|
|
