133 lines
3.6 KiB
Rust
133 lines
3.6 KiB
Rust
// server/src/camera.rs
|
|
|
|
#![cfg_attr(coverage, allow(dead_code, unused_imports, unused_variables))]
|
|
|
|
mod selection;
|
|
|
|
use std::sync::{OnceLock, RwLock};
|
|
|
|
use selection::select_camera_config;
|
|
|
|
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
|
|
pub enum CameraOutput {
|
|
Uvc,
|
|
Hdmi,
|
|
}
|
|
|
|
impl CameraOutput {
|
|
/// Return the canonical string name for the transport.
|
|
pub fn as_str(self) -> &'static str {
|
|
match self {
|
|
CameraOutput::Uvc => "uvc",
|
|
CameraOutput::Hdmi => "hdmi",
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
|
|
pub enum CameraCodec {
|
|
H264,
|
|
Mjpeg,
|
|
}
|
|
|
|
impl CameraCodec {
|
|
/// Return the canonical string name for the codec.
|
|
pub fn as_str(self) -> &'static str {
|
|
match self {
|
|
CameraCodec::H264 => "h264",
|
|
CameraCodec::Mjpeg => "mjpeg",
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
|
|
pub struct HdmiMode {
|
|
pub width: u32,
|
|
pub height: u32,
|
|
}
|
|
|
|
#[derive(Clone, Debug)]
|
|
pub struct HdmiConnector {
|
|
pub name: String,
|
|
pub id: Option<u32>,
|
|
pub modes: Vec<HdmiMode>,
|
|
}
|
|
|
|
#[derive(Clone, Debug)]
|
|
pub struct CameraConfig {
|
|
pub output: CameraOutput,
|
|
pub codec: CameraCodec,
|
|
pub width: u32,
|
|
pub height: u32,
|
|
pub fps: u32,
|
|
pub hdmi: Option<HdmiConnector>,
|
|
}
|
|
|
|
impl CameraConfig {
|
|
/// Return the HDMI display mode that should be driven on the wire.
|
|
///
|
|
/// Inputs: the selected camera config and optional HDMI mode overrides.
|
|
/// Outputs: a width/height pair for the physical display pipeline.
|
|
/// Why: the client webcam uplink can stay at a known-good capture profile
|
|
/// while HDMI output scales to a mode the capture adapter actually locks.
|
|
pub fn hdmi_display_size(&self) -> (u32, u32) {
|
|
if self.output != CameraOutput::Hdmi {
|
|
return (self.width, self.height);
|
|
}
|
|
|
|
if let (Some(width), Some(height)) = (
|
|
selection::read_u32_from_env("LESAVKA_HDMI_WIDTH"),
|
|
selection::read_u32_from_env("LESAVKA_HDMI_HEIGHT"),
|
|
) {
|
|
return (width, height);
|
|
}
|
|
|
|
self.hdmi
|
|
.as_ref()
|
|
.and_then(|hdmi| selection::preferred_hdmi_mode(&hdmi.modes))
|
|
.map(|mode| (mode.width, mode.height))
|
|
.unwrap_or((self.width, self.height))
|
|
}
|
|
}
|
|
|
|
static LAST_CONFIG: OnceLock<RwLock<CameraConfig>> = OnceLock::new();
|
|
|
|
/// Refresh the cached camera config from the current environment.
|
|
///
|
|
/// Inputs: none; the selector consults the current environment and local
|
|
/// `/sys/class/drm` state.
|
|
/// Outputs: the newly selected camera configuration, which is also stored as
|
|
/// the last-known config for future reads.
|
|
/// Why: callers need a single entrypoint for changing the active output mode
|
|
/// without re-implementing the selection rules.
|
|
pub fn update_camera_config() -> CameraConfig {
|
|
let cfg = select_camera_config();
|
|
let lock = LAST_CONFIG.get_or_init(|| RwLock::new(cfg.clone()));
|
|
*lock.write().unwrap() = cfg.clone();
|
|
cfg
|
|
}
|
|
|
|
#[cfg(coverage)]
|
|
pub fn current_camera_config() -> CameraConfig {
|
|
update_camera_config()
|
|
}
|
|
|
|
/// Return the last selected camera configuration.
|
|
///
|
|
/// Inputs: none.
|
|
/// Outputs: the cached camera configuration, or a freshly selected one when
|
|
/// the cache has not been initialized yet.
|
|
/// Why: call sites can read the active config without worrying about whether
|
|
/// initialization already happened in this process.
|
|
#[cfg(not(coverage))]
|
|
pub fn current_camera_config() -> CameraConfig {
|
|
if let Some(lock) = LAST_CONFIG.get() {
|
|
return lock.read().unwrap().clone();
|
|
}
|
|
update_camera_config()
|
|
}
|
|
|
|
#[cfg(test)]
|
|
#[path = "tests/camera.rs"]
|
|
mod tests;
|