v4l/video/capture/
parameters.rs

1use bitflags::bitflags;
2use std::{fmt, mem};
3
4use crate::fraction::Fraction;
5use crate::parameters::Capabilities;
6use crate::v4l_sys::*;
7
8bitflags! {
9    pub struct Modes: u32 {
10        const HIGH_QUALITY      = 0x1000;
11    }
12}
13
14impl From<u32> for Modes {
15    fn from(caps: u32) -> Self {
16        Self::from_bits_truncate(caps)
17    }
18}
19
20impl From<Modes> for u32 {
21    fn from(modes: Modes) -> Self {
22        modes.bits()
23    }
24}
25
26impl fmt::Display for Modes {
27    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
28        fmt::Debug::fmt(self, f)
29    }
30}
31
32#[derive(Debug, Copy, Clone)]
33/// Streaming parameters (single-planar)
34pub struct Parameters {
35    pub capabilities: Capabilities,
36    pub modes: Modes,
37    pub interval: Fraction,
38}
39
40impl Parameters {
41    pub fn new(frac: Fraction) -> Self {
42        Parameters {
43            capabilities: Capabilities::from(0),
44            modes: Modes::from(0),
45            interval: frac,
46        }
47    }
48
49    pub fn with_fps(fps: u32) -> Self {
50        Parameters {
51            capabilities: Capabilities::from(0),
52            modes: Modes::from(0),
53            interval: Fraction::new(1, fps),
54        }
55    }
56}
57
58impl fmt::Display for Parameters {
59    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
60        writeln!(f, "capabilities : {}", self.capabilities)?;
61        writeln!(f, "modes        : {}", self.modes)?;
62        writeln!(f, "interval     : {} [s]", self.interval)?;
63        Ok(())
64    }
65}
66
67impl From<v4l2_captureparm> for Parameters {
68    fn from(params: v4l2_captureparm) -> Self {
69        Self {
70            capabilities: Capabilities::from(params.capability),
71            modes: Modes::from(params.capturemode),
72            interval: Fraction::from(params.timeperframe),
73        }
74    }
75}
76
77impl From<Parameters> for v4l2_captureparm {
78    fn from(parameters: Parameters) -> Self {
79        Self {
80            capability: parameters.capabilities.into(),
81            capturemode: parameters.modes.into(),
82            timeperframe: parameters.interval.into(),
83            ..unsafe { mem::zeroed() }
84        }
85    }
86}
v4l/video/capture/parameters.rs

v4l/video/capture/
parameters.rs
