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Method next_frame

rustcv-camera/src/camera.rs:113–123  ·  view source on GitHub ↗

Capture the next frame (zero-copy). 采集下一帧(零拷贝)。 The returned [`Frame`] borrows directly from the kernel's mmap buffer. No data is copied. The frame must be dropped before calling `next_frame()` again (enforced by the borrow checker). 返回的 [`Frame`] 直接借用内核的 mmap 缓冲区。 不进行数据拷贝。帧必须在再次调用 `next_frame()` 前被 drop (由借用检查器强制保证)。 # Blocking This call blocks until the next frame is ready from the camera. A

(&mut self)

Source from the content-addressed store, hash-verified

111 /// 此调用会阻塞直到摄像头的下一帧就绪。
112 /// 30fps 时约 33ms;120fps 时约 8.3ms。
113 pub fn next_frame(&mut self) -> Result<Frame<'_>> {
114 let raw = self.backend.dequeue()?;
115 Ok(Frame::new(
116 raw.data,
117 raw.width,
118 raw.height,
119 raw.pixel_format,
120 raw.sequence,
121 raw.timestamp_us,
122 ))
123 }
124
125 /// Capture and decode the next frame into a reusable [`Mat`].
126 /// 采集并解码下一帧到可复用的 [`Mat`]。

Callers 5

newMethod · 0.45
bench_raw_dqbufFunction · 0.45
bench_detailed_statsFunction · 0.45
read_decodedMethod · 0.45
mainFunction · 0.45

Calls 1

dequeueMethod · 0.45

Tested by

no test coverage detected