[4/4]解决USB摄像头打开相机预览界面绿屏

liyujie

2025-08-28 786ff4f4ca2374bdd9177f2e24b503d43e7a3b93

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SG_FLAG_DIRECT_IO        1
SG_FLAG_UNUSED_LUN_INHIBIT    2
SG_FLAG_MMAP_IO            4
SG_FLAG_NO_DXFER        0x10000
SG_FLAG_Q_AT_TAIL        0x10
SG_FLAG_Q_AT_HEAD        0x20