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# 安全な解像度値のリスト
SAFE_RESOLUTIONS = [512, 640, 768, 960, 1080]
# 標準解像度のバケット設定
bucket_options = {
512: [
(352, 704),
(384, 640),
(416, 608),
(448, 576),
(480, 544),
(512, 512),
(544, 480),
(576, 448),
(608, 416),
(640, 384),
(704, 352),
],
640: [
(416, 960),
(448, 864),
(480, 832),
(512, 768),
(544, 704),
(576, 672),
(608, 640),
(640, 608),
(672, 576),
(704, 544),
(768, 512),
(832, 480),
(864, 448),
(960, 416),
],
768: [
(512, 1024),
(576, 960),
(640, 896),
(704, 832),
(768, 768),
(832, 704),
(896, 640),
(960, 576),
(1024, 512),
],
960: [
(640, 1280),
(704, 1152),
(768, 1024),
(832, 960),
(896, 896),
(960, 832),
(1024, 768),
(1152, 704),
(1280, 640),
],
1080: [
(720, 1440),
(768, 1344),
(832, 1248),
(896, 1152),
(960, 1080),
(1024, 1024),
(1080, 960),
(1152, 896),
(1248, 832),
(1344, 768),
(1440, 720),
],
}
def find_nearest_bucket(h, w, resolution=640):
"""最も適切なアスペクト比のバケットを見つける関数"""
# 安全な解像度に丸める
if resolution not in SAFE_RESOLUTIONS:
# 最も近い安全な解像度を選択
closest_resolution = min(SAFE_RESOLUTIONS, key=lambda x: abs(x - resolution))
print(f"Warning: Resolution {resolution} is not in safe list. Using {closest_resolution} instead.")
resolution = closest_resolution
min_metric = float('inf')
best_bucket = None
for (bucket_h, bucket_w) in bucket_options[resolution]:
# アスペクト比の差を計算
metric = abs(h * bucket_w - w * bucket_h)
if metric <= min_metric:
min_metric = metric
best_bucket = (bucket_h, bucket_w)
return best_bucket
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