24024
d4b28a731a
- 新增 SystemNotification 模型，实现系统通知的数据存储 - 管理后台新增通知相关接口，支持通知的增删改查 - 用户端新增接口，获取最新激活通知并支持标记已读 - 在前端首页添加全局通知弹窗，实现通知自动轮询及已读同步 - 生成历史记录中兼容支持图片缩略图及新旧图片格式 - 优化后台图片同步逻辑，新增缩略图生成与存储 - 支持上传参考图的拖拽、粘贴、多文件上传及排序功能 - 增加购买积分页面入口及菜单项，调整菜单结构 - 日志系统由 Redis 列表迁移为有序集合，保留 30 天日志 - 优化日志页面样式，提升可读性及滚动体验 - 调整部分模板布局为自定义滚动条容器，增强视觉一致性
85 lines
2.0 KiB
Python
85 lines
2.0 KiB
Python
#
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# The Python Imaging Library.
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# $Id$
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#
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# MPEG file handling
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#
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# History:
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# 95-09-09 fl Created
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#
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# Copyright (c) Secret Labs AB 1997.
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# Copyright (c) Fredrik Lundh 1995.
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#
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# See the README file for information on usage and redistribution.
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#
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from __future__ import annotations
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from . import Image, ImageFile
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from ._binary import i8
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from ._typing import SupportsRead
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#
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# Bitstream parser
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class BitStream:
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def __init__(self, fp: SupportsRead[bytes]) -> None:
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self.fp = fp
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self.bits = 0
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self.bitbuffer = 0
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def next(self) -> int:
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return i8(self.fp.read(1))
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def peek(self, bits: int) -> int:
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while self.bits < bits:
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self.bitbuffer = (self.bitbuffer << 8) + self.next()
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self.bits += 8
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return self.bitbuffer >> (self.bits - bits) & (1 << bits) - 1
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def skip(self, bits: int) -> None:
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while self.bits < bits:
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self.bitbuffer = (self.bitbuffer << 8) + i8(self.fp.read(1))
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self.bits += 8
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self.bits = self.bits - bits
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def read(self, bits: int) -> int:
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v = self.peek(bits)
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self.bits = self.bits - bits
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return v
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def _accept(prefix: bytes) -> bool:
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return prefix.startswith(b"\x00\x00\x01\xb3")
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##
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# Image plugin for MPEG streams. This plugin can identify a stream,
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# but it cannot read it.
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class MpegImageFile(ImageFile.ImageFile):
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format = "MPEG"
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format_description = "MPEG"
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def _open(self) -> None:
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assert self.fp is not None
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s = BitStream(self.fp)
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if s.read(32) != 0x1B3:
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msg = "not an MPEG file"
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raise SyntaxError(msg)
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self._mode = "RGB"
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self._size = s.read(12), s.read(12)
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# --------------------------------------------------------------------
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# Registry stuff
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Image.register_open(MpegImageFile.format, MpegImageFile, _accept)
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Image.register_extensions(MpegImageFile.format, [".mpg", ".mpeg"])
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Image.register_mime(MpegImageFile.format, "video/mpeg")
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