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fix: 修复 v4l2loopback 的 DQBUF 兼容问题

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mofeng-git
2026-07-17 23:25:24 +08:00
parent 563c808836
commit eaa114f40c
2 changed files with 4 additions and 2 deletions
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4
libs/v4l2r/src/ioctl/dqbuf.rs
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@@ -2,6 +2,7 @@ use crate::ioctl::ioctl_and_convert;
use crate::ioctl::IoctlConvertError;
use crate::ioctl::IoctlConvertResult;
use crate::ioctl::UncheckedV4l2Buffer;
use crate::memory::MemoryType;
use crate::QueueType;
use std::convert::TryFrom;
@@ -51,12 +52,13 @@ pub type DqBufError<CE> = IoctlConvertError<DqBufIoctlError, CE>;
pub type DqBufResult<O, CE> = IoctlConvertResult<O, DqBufIoctlError, CE>;
/// Safe wrapper around the `VIDIOC_DQBUF` ioctl.
pub fn dqbuf<O>(fd: &impl AsRawFd, queue: QueueType) -> DqBufResult<O, O::Error>
pub fn dqbuf<O>(fd: &impl AsRawFd, queue: QueueType, memory: MemoryType) -> DqBufResult<O, O::Error>
where
O: TryFrom<UncheckedV4l2Buffer>,
O::Error: std::fmt::Debug,
{
let mut v4l2_buf = UncheckedV4l2Buffer::new_for_querybuf(queue, None);
v4l2_buf.0.memory = memory as u32;
ioctl_and_convert(
unsafe { ioctl::vidioc_dqbuf(fd.as_raw_fd(), v4l2_buf.as_mut()) }