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capricV2EX 第 228267 号会员，加入于 2017-04-29 07:50:15 +08:00 |
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4 天前 回复了 jeddida 创建的主题 › FFmpeg › 有大佬开发过 ffmpeg 吗？用 c++调用 ffmpeg API 解码视频流 CPU 占用率高，求解决办法 |
用 libmpv 启用 hwdec=auto ，或者使用 ffmpeg 硬件加速+libplacebo ，播放器非常复杂，要颜色映射，hdr/sdr ，还要向上向下缩放，还有同步策略和丢帧策略，做不好不是卡就是画面偏色或者资源占用高
14 天前 回复了 bler 创建的主题 › 程序员 › 除了 VMware,virtualbox 意外，还有其他什么创建一个独立环境的工具吗 |
@bler docker+qemu+kvm 装 windows, macOS 。https://github.com/dockur/windows ，https://github.com/dockur/macos
18 天前 回复了 52txr 创建的主题 › 程序员 › 有人用过 Win10 Tiny10 极限精简版吗？我的旧电脑看着带不动正常版本了 |
我跑 visual studio 2022 和 rust 自动化 runner ，用来编译代码，tiny10/tiny11 没有问题，是在 linux 下 qemu 跑的，不是物理机 https://github.com/dockur/windows
18 天前 回复了 bli22ard 创建的主题 › 程序员 › rust 中看似非常简单操作，竟然导致段错误 |
建议用 https://github.com/rust-cross/cargo-zigbuild 或者 https://github.com/cross-rs/cross 静态链接 musl ，不要静态链接 glibc ，可以动态链接 2012 年的 glibc2.17 ，就可以在主流相同指令集的 linux 上跑起来，比如 cargo zigbuild --target aarch64-unknown-linux-gnu.2.17
55 天前 回复了 HkMuxxx 创建的主题 › iPhone › iPhone 镜像耗电吗？ |
不是 DLNA ，AirPlay 镜像是屏幕声音录制，编码，加密，传输，显示端接收、解密，解码渲染，加密和编码有硬件加速，具体耗电量还得结合码率、画质看
60 天前 回复了 yuan321 创建的主题 › Apple › 刚刚看了新款的 mac mini 在京东上上架了，但是不支持国补 |
楼上用的哪里的国补啊，我看北京的用不了啊
97 天前 回复了 bli22ard 创建的主题 › Rust › rust TcpStream 为什么设计读写一体 |
@bli22ard 实现在这里，就是很简单的 Arc 和 clone
```rust
/// Owned read half of a [`TcpStream`], created by [`into_split`].
///
/// Reading from an `OwnedReadHalf` is usually done using the convenience methods found
/// on the [`AsyncReadExt`] trait.
///
/// [`TcpStream`]: TcpStream
/// [`into_split`]: TcpStream::into_split()
/// [`AsyncReadExt`]: trait@crate::io::AsyncReadExt
#[derive(Debug)]
pub struct OwnedReadHalf {
inner: Arc<TcpStream>,
}
/// Owned write half of a [`TcpStream`], created by [`into_split`].
///
/// Note that in the [`AsyncWrite`] implementation of this type, [`poll_shutdown`] will
/// shut down the TCP stream in the write direction. Dropping the write half
/// will also shut down the write half of the TCP stream.
///
/// Writing to an `OwnedWriteHalf` is usually done using the convenience methods found
/// on the [`AsyncWriteExt`] trait.
///
/// [`TcpStream`]: TcpStream
/// [`into_split`]: TcpStream::into_split()
/// [`AsyncWrite`]: trait@crate::io::AsyncWrite
/// [`poll_shutdown`]: fn@crate::io::AsyncWrite::poll_shutdown
/// [`AsyncWriteExt`]: trait@crate::io::AsyncWriteExt
#[derive(Debug)]
pub struct OwnedWriteHalf {
inner: Arc<TcpStream>,
shutdown_on_drop: bool,
}
pub(crate) fn split_owned(stream: TcpStream) -> (OwnedReadHalf, OwnedWriteHalf) {
let arc = Arc::new(stream);
let read = OwnedReadHalf {
inner: Arc::clone(&arc),
};
let write = OwnedWriteHalf {
inner: arc,
shutdown_on_drop: true,
};
(read, write)
}
```
```rust
/// Owned read half of a [`TcpStream`], created by [`into_split`].
///
/// Reading from an `OwnedReadHalf` is usually done using the convenience methods found
/// on the [`AsyncReadExt`] trait.
///
/// [`TcpStream`]: TcpStream
/// [`into_split`]: TcpStream::into_split()
/// [`AsyncReadExt`]: trait@crate::io::AsyncReadExt
#[derive(Debug)]
pub struct OwnedReadHalf {
inner: Arc<TcpStream>,
}
/// Owned write half of a [`TcpStream`], created by [`into_split`].
///
/// Note that in the [`AsyncWrite`] implementation of this type, [`poll_shutdown`] will
/// shut down the TCP stream in the write direction. Dropping the write half
/// will also shut down the write half of the TCP stream.
///
/// Writing to an `OwnedWriteHalf` is usually done using the convenience methods found
/// on the [`AsyncWriteExt`] trait.
///
/// [`TcpStream`]: TcpStream
/// [`into_split`]: TcpStream::into_split()
/// [`AsyncWrite`]: trait@crate::io::AsyncWrite
/// [`poll_shutdown`]: fn@crate::io::AsyncWrite::poll_shutdown
/// [`AsyncWriteExt`]: trait@crate::io::AsyncWriteExt
#[derive(Debug)]
pub struct OwnedWriteHalf {
inner: Arc<TcpStream>,
shutdown_on_drop: bool,
}
pub(crate) fn split_owned(stream: TcpStream) -> (OwnedReadHalf, OwnedWriteHalf) {
let arc = Arc::new(stream);
let read = OwnedReadHalf {
inner: Arc::clone(&arc),
};
let write = OwnedWriteHalf {
inner: arc,
shutdown_on_drop: true,
};
(read, write)
}
```
98 天前 回复了 bli22ard 创建的主题 › Rust › rust TcpStream 为什么设计读写一体 |
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