649 lines
22 KiB
Rust
649 lines
22 KiB
Rust
//! `pixelpass doctor` — environment diagnostics.
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//!
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//! Screen-share failures are usually not pixelpass bugs but environment gaps:
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//! a missing GStreamer plugin, an X vs. Wayland mismatch, or — the common one —
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//! a GPU/driver with no working VA-API H.264 encoder, so the default
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//! `vah264enc` pipeline never produces a byte and the viewer "can't connect."
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//! `doctor` probes all of that up front and prints one actionable report, so a
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//! remote tester can read it over a call instead of us guessing from logs. It
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//! also validates any X11/Wayland test environment we stand up.
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//!
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//! Unlike [`crate::common::deps::check_host_binaries`], which bails on the first
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//! missing dependency, doctor runs *every* check and reports them together — a
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//! diagnostic wants the whole picture, not the first failure.
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use anyhow::Result;
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use std::time::Duration;
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use crate::common::deps;
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use crate::common::display::DisplayServer;
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use crate::common::endpoint;
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub enum Status {
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/// Working as needed.
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Ok,
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/// Degraded but not fatal (e.g. a fallback path is available).
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Warn,
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/// Screen-sharing will not work until this is fixed.
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Fail,
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/// Neutral fact, no judgement.
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Info,
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}
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impl Status {
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fn icon(self) -> char {
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match self {
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Self::Ok => '✓',
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Self::Warn => '!',
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Self::Fail => '✗',
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Self::Info => '·',
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}
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}
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}
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/// One line in the report: a status, a short label, a detail, and an optional
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/// remediation hint printed on its own indented line.
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pub struct Check {
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pub status: Status,
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pub label: String,
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pub detail: String,
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pub hint: Option<String>,
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}
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impl Check {
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fn new(status: Status, label: impl Into<String>, detail: impl Into<String>) -> Self {
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Self {
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status,
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label: label.into(),
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detail: detail.into(),
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hint: None,
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}
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}
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fn ok(label: impl Into<String>, detail: impl Into<String>) -> Self {
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Self::new(Status::Ok, label, detail)
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}
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fn warn(label: impl Into<String>, detail: impl Into<String>) -> Self {
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Self::new(Status::Warn, label, detail)
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}
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fn fail(label: impl Into<String>, detail: impl Into<String>) -> Self {
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Self::new(Status::Fail, label, detail)
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}
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fn info(label: impl Into<String>, detail: impl Into<String>) -> Self {
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Self::new(Status::Info, label, detail)
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}
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fn with_hint(mut self, hint: impl Into<String>) -> Self {
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self.hint = Some(hint.into());
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self
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}
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}
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/// Tally of the non-trivial statuses across every section.
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#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
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pub struct Summary {
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pub fails: usize,
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pub warns: usize,
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}
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/// A named group of checks, printed under a header.
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struct Section {
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name: &'static str,
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checks: Vec<Check>,
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}
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/// Run all diagnostics and print the report. Always prints; the process exit
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/// code is non-zero only when a hard failure (a `Fail`) was found, so scripts
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/// and CI can gate on it while a human still sees everything.
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pub async fn run(relay: Option<String>) -> Result<()> {
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let display = DisplayServer::detect();
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let sections = vec![
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system_section(display),
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capture_section(display),
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encode_section(),
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mux_audio_section(),
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viewer_section(),
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network_section(relay.as_deref()).await,
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];
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print_report(§ions);
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let summary = summarize(sections.iter().flat_map(|s| s.checks.iter()));
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print_summary(summary, §ions);
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if summary.fails > 0 {
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std::process::exit(1);
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}
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Ok(())
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}
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// ── sections ──────────────────────────────────────────────────────────────
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fn system_section(display: DisplayServer) -> Section {
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let mut checks = vec![
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Check::info(
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"pixelpass",
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format!("{} (gui: {})", env!("CARGO_PKG_VERSION"), gui_built()),
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),
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Check::info("distro", distro_detail()),
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display_check(display),
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];
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// Probe the actual X server when one is reachable — this is where an xlibre
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// vs. Xorg difference (the thing we most want to see on a tester's box)
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// shows up. Skip it on a pure Wayland session with no X at all.
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if display == DisplayServer::X11 || std::env::var_os("DISPLAY").is_some() {
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checks.push(x_server_check());
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}
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Section {
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name: "System",
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checks,
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}
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}
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fn capture_section(display: DisplayServer) -> Section {
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let mut checks = vec![
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bin_check("gst-launch-1.0", "gstreamer tools"),
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bin_check("gst-inspect-1.0", "gstreamer tools"),
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];
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match display {
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DisplayServer::Wayland => {
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checks.push(gst_check("pipewiresrc", "Wayland capture"));
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}
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DisplayServer::X11 => {
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checks.push(gst_check("ximagesrc", "X11 capture"));
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checks.push(match deps::which("xwininfo") {
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Some(p) => Check::ok("window picker", p.display().to_string())
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.with_hint("needed only for `--window` (share a single window)"),
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None => Check::info("window picker", "xwininfo not found")
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.with_hint("optional — only `--window` needs it"),
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});
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}
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DisplayServer::Unknown => {
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checks.push(
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Check::info("capture backend", "unknown — cannot probe a source element")
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.with_hint("force one with `--display-server x11|wayland` when hosting"),
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);
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}
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}
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Section {
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name: "Capture (host)",
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checks,
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}
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}
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fn encode_section() -> Section {
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Section {
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name: "Encode",
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checks: vec![hardware_encode_check(), software_encode_check()],
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}
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}
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/// The load-bearing check for the common "viewer can't connect" report: the
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/// default host pipeline uses `vah264enc`, which needs both the GStreamer VA
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/// plugin *and* a GPU/driver that actually exposes an H.264 encode entrypoint.
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/// A box with the plugin but no encode entrypoint (or no render node) produces
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/// no video — the exact silent failure `--no-hwencode` works around.
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fn hardware_encode_check() -> Check {
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if !deps::gst_element_exists("vah264enc") {
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return Check::warn("hardware H.264", "vah264enc plugin not installed").with_hint(format!(
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"{} — or just host with `--no-hwencode` (software x264)",
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deps::install_hint_for_gst_element("vah264enc")
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));
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}
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if !has_render_node() {
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return Check::warn(
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"hardware H.264",
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"vah264enc present, but no DRM render node (/dev/dri/renderD*)",
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)
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.with_hint("GPU encode is unavailable here — host with `--no-hwencode`");
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}
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match vainfo_output() {
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Some(out) if vainfo_has_h264_encode(&out) => Check::ok(
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"hardware H.264",
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"VA-API H.264 encode available (vah264enc)",
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),
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Some(_) => Check::warn(
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"hardware H.264",
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"vah264enc present, but VA-API reports no H.264 encode entrypoint",
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)
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.with_hint("this GPU/driver can't hardware-encode H.264 — host with `--no-hwencode`"),
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None => Check::info(
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"hardware H.264",
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"vah264enc + render node present; couldn't confirm the VA-API encode entrypoint",
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)
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.with_hint("install `vainfo` (libva-utils) to verify, or just test a real host session"),
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}
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}
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fn software_encode_check() -> Check {
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if deps::gst_element_exists("x264enc") {
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Check::ok("software H.264", "x264enc available (`--no-hwencode`)")
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} else {
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Check::warn("software H.264", "x264enc not installed").with_hint(format!(
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"{} — the fallback for GPUs without VA-API H.264 encode",
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deps::install_hint_for_gst_element("x264enc")
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))
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}
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}
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fn mux_audio_section() -> Section {
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// These live in plugins-bad/-good/-libav and plugins-base; all are required
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// for either backend, so a miss here is a hard Fail.
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let tail = [
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"h264parse",
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"mpegtsmux",
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"aacparse",
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"avenc_aac",
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"pulsesrc",
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"videoscale",
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];
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let missing: Vec<&str> = tail
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.iter()
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.copied()
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.filter(|e| !deps::gst_element_exists(e))
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.collect();
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let tail_check = if missing.is_empty() {
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Check::ok("mux + audio tail", tail.join(", "))
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} else {
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Check::fail(
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"mux + audio tail",
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format!("missing: {}", missing.join(", ")),
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)
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.with_hint(deps::install_hint_for_gst_element(missing[0]))
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};
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Section {
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name: "Mux / audio",
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checks: vec![tail_check, bin_check("pactl", "pactl")],
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}
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}
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fn viewer_section() -> Section {
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let mpv = deps::which("mpv");
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let vlc = deps::which("vlc");
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let check = match (mpv, vlc) {
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(Some(p), _) => Check::ok("player", format!("mpv ({})", p.display())),
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(None, Some(p)) => Check::ok("player", format!("vlc ({})", p.display()))
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.with_hint("mpv is the recommended player; vlc needs the dvb + ffmpeg plugins"),
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(None, None) => Check::warn("player", "neither mpv nor vlc found")
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.with_hint("a viewer needs one of them; the GUI launches mpv by default"),
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};
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Section {
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name: "Viewer",
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checks: vec![check],
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}
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}
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/// Bind a real video-plane endpoint and wait briefly for a relay, mirroring
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/// what a host does. Directly relevant to "couldn't connect": if this machine
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/// can't reach a relay, hole-punching to a peer is unlikely to work either.
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async fn network_section(relay: Option<&str>) -> Section {
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let check = match endpoint::bind(relay).await {
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Ok(ep) => {
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let online = tokio::time::timeout(Duration::from_secs(8), ep.online())
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.await
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.is_ok();
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let relay_count = ep.addr().addrs.iter().filter(|a| a.is_relay()).count();
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let where_ = relay.map(|r| format!(" ({r})")).unwrap_or_default();
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// Close gracefully so iroh doesn't log a scary "Endpoint dropped
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// without calling close" error into the middle of the report.
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ep.close().await;
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if online && relay_count > 0 {
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Check::ok("relay", format!("home relay reachable{where_}"))
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} else if online {
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Check::warn(
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"relay",
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format!("endpoint online but no relay address{where_}"),
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)
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.with_hint(
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"n0 DNS discovery may still connect peers, but relay fallback is degraded",
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)
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} else {
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Check::warn("relay", format!("no relay connected within 8s{where_}")).with_hint(
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"check connectivity/firewall; peers behind NAT rely on the relay to rendezvous",
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)
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}
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}
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Err(e) => Check::fail("relay", format!("could not bind endpoint: {e}")),
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};
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Section {
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name: "Network",
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checks: vec![check],
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}
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}
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// ── small check builders ────────────────────────────────────────────────────
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fn bin_check(bin: &str, label: &str) -> Check {
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match deps::which(bin) {
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Some(p) => Check::ok(label, format!("{bin} ({})", p.display())),
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None => Check::fail(label, format!("{bin} not found on PATH"))
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.with_hint(deps::install_hint_for_bin(bin)),
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}
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}
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fn gst_check(element: &str, label: &str) -> Check {
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if deps::gst_element_exists(element) {
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Check::ok(label, element.to_string())
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} else {
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Check::fail(
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label,
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format!("GStreamer element `{element}` not available"),
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)
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.with_hint(deps::install_hint_for_gst_element(element))
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}
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}
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fn display_check(display: DisplayServer) -> Check {
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let env = display_env_summary();
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match display {
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DisplayServer::Wayland => Check::ok("display server", format!("Wayland ({env})")),
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DisplayServer::X11 => Check::ok("display server", format!("X11 ({env})")),
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DisplayServer::Unknown => Check::fail("display server", format!("undetected ({env})"))
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.with_hint(
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"no WAYLAND_DISPLAY/DISPLAY/XDG_SESSION_TYPE — capture can't start; \
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run inside a graphical session or pass `--display-server`",
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),
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}
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}
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/// Connect to the X server and report its vendor + version. This is how an
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/// xlibre server distinguishes itself from stock Xorg (vendor string / release
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/// number), which is exactly what we want to see on a tester's machine.
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fn x_server_check() -> Check {
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use x11rb::connection::Connection;
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match x11rb::connect(None) {
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Ok((conn, _screen)) => {
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let setup = conn.setup();
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let vendor = String::from_utf8_lossy(&setup.vendor);
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let detail = format!(
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"vendor \"{}\", protocol {}.{}, release {}",
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vendor.trim(),
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setup.protocol_major_version,
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setup.protocol_minor_version,
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setup.release_number,
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);
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let label = "X server";
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if vendor.to_lowercase().contains("xlibre") {
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Check::info(label, format!("XLibre — {detail}"))
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} else {
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Check::info(label, detail)
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}
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}
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Err(_) => Check::info("X server", "DISPLAY set but the X server is unreachable"),
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}
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}
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// ── environment helpers ─────────────────────────────────────────────────────
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fn gui_built() -> &'static str {
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if cfg!(feature = "gui") { "yes" } else { "no" }
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}
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fn distro_detail() -> String {
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let id = deps::detect_distro();
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let pretty = os_release_field("PRETTY_NAME");
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match (id, pretty) {
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(Some(id), Some(p)) => format!("{id} ({p})"),
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(Some(id), None) => id,
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(None, Some(p)) => p,
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(None, None) => "unknown".to_string(),
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}
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}
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fn os_release_field(key: &str) -> Option<String> {
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let contents = std::fs::read_to_string("/etc/os-release").ok()?;
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for line in contents.lines() {
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if let Some(rest) = line.strip_prefix(&format!("{key}=")) {
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return Some(rest.trim_matches('"').to_string());
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}
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}
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None
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}
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fn display_env_summary() -> String {
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let mut parts = Vec::new();
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for var in [
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"WAYLAND_DISPLAY",
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"DISPLAY",
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"XDG_SESSION_TYPE",
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"XDG_CURRENT_DESKTOP",
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] {
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if let Some(v) = std::env::var_os(var) {
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parts.push(format!("{var}={}", v.to_string_lossy()));
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}
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}
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if parts.is_empty() {
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"no display env vars set".to_string()
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} else {
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parts.join(", ")
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}
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}
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fn has_render_node() -> bool {
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let Ok(entries) = std::fs::read_dir("/dev/dri") else {
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return false;
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};
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entries
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.flatten()
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.any(|e| e.file_name().to_string_lossy().starts_with("renderD"))
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}
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fn vainfo_output() -> Option<String> {
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deps::which("vainfo")?;
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let out = std::process::Command::new("vainfo").output().ok()?;
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// vainfo prints its profile/entrypoint table to stdout; some builds also
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// spill driver banners to stderr. Concatenate both so parsing is robust.
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let mut s = String::from_utf8_lossy(&out.stdout).into_owned();
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s.push_str(&String::from_utf8_lossy(&out.stderr));
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Some(s)
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}
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/// Pure: does a `vainfo` dump advertise an H.264 *encode* entrypoint? vainfo
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/// lists one `VAProfile… : VAEntrypoint…` pair per line; hardware H.264 encode
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/// is any `VAProfileH264*` profile paired with an `EncSlice`/`EncSliceLP`
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/// entrypoint. VLD-only H.264 (decode) does not count.
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fn vainfo_has_h264_encode(output: &str) -> bool {
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output.lines().any(|line| {
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line.contains("VAProfileH264")
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&& (line.contains("VAEntrypointEncSlice") || line.contains("VAEntrypointEncSliceLP"))
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})
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}
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// ── reporting ───────────────────────────────────────────────────────────────
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fn print_report(sections: &[Section]) {
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println!("pixelpass doctor\n");
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for section in sections {
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println!("{}", section.name);
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for check in §ion.checks {
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println!(
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" {} {:<16} {}",
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check.status.icon(),
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check.label,
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check.detail
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);
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if let Some(hint) = &check.hint {
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println!(" → {hint}");
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}
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}
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println!();
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}
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}
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fn summarize<'a>(checks: impl Iterator<Item = &'a Check>) -> Summary {
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let mut summary = Summary::default();
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for check in checks {
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match check.status {
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Status::Fail => summary.fails += 1,
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Status::Warn => summary.warns += 1,
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Status::Ok | Status::Info => {}
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}
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}
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summary
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}
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fn print_summary(summary: Summary, sections: &[Section]) {
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let hosting = hosting_verdict(sections);
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let counts = match (summary.fails, summary.warns) {
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(0, 0) => "all checks passed".to_string(),
|
|
(0, w) => format!("{w} warning{}", plural(w)),
|
|
(f, 0) => format!("{f} failure{}", plural(f)),
|
|
(f, w) => format!("{f} failure{}, {w} warning{}", plural(f), plural(w)),
|
|
};
|
|
println!("Summary: {counts}. {hosting}");
|
|
}
|
|
|
|
fn plural(n: usize) -> &'static str {
|
|
if n == 1 { "" } else { "s" }
|
|
}
|
|
|
|
/// A one-line verdict on whether this box can host, and how. Reads the actual
|
|
/// encode + capture checks rather than the raw tally so the advice is specific.
|
|
fn hosting_verdict(sections: &[Section]) -> String {
|
|
let find = |section: &str, label: &str| -> Option<Status> {
|
|
sections
|
|
.iter()
|
|
.find(|s| s.name == section)?
|
|
.checks
|
|
.iter()
|
|
.find(|c| c.label == label)
|
|
.map(|c| c.status)
|
|
};
|
|
|
|
let hw = find("Encode", "hardware H.264");
|
|
let sw_ok = find("Encode", "software H.264") == Some(Status::Ok);
|
|
let capture_broken = sections
|
|
.iter()
|
|
.find(|s| s.name == "Capture (host)")
|
|
.map(|s| s.checks.iter().any(|c| c.status == Status::Fail))
|
|
.unwrap_or(false);
|
|
|
|
if capture_broken {
|
|
"Hosting will fail: the capture backend is incomplete (see Capture above).".to_string()
|
|
} else if hw == Some(Status::Ok) {
|
|
"Hosting will work (hardware H.264 encode).".to_string()
|
|
} else if hw == Some(Status::Info) && sw_ok {
|
|
// Plugin + render node present but VA-API unverified (no vainfo): the
|
|
// default encoder is likely fine; `--no-hwencode` is the safe fallback.
|
|
"Hosting should work (hardware H.264 likely; `--no-hwencode` is the fallback).".to_string()
|
|
} else if sw_ok {
|
|
"Hosting should work with `--no-hwencode` (software H.264 encode).".to_string()
|
|
} else {
|
|
"Hosting may fail: no working H.264 encoder found (see Encode above).".to_string()
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn vainfo_detects_h264_encode_entrypoint() {
|
|
// Realistic AMD/RADV-style dump: H.264 has both decode (VLD) and encode.
|
|
let dump = "\
|
|
VAProfileH264Main : VAEntrypointVLD
|
|
VAProfileH264Main : VAEntrypointEncSlice
|
|
VAProfileH264High : VAEntrypointVLD
|
|
VAProfileHEVCMain : VAEntrypointEncSlice";
|
|
assert!(vainfo_has_h264_encode(dump));
|
|
}
|
|
|
|
#[test]
|
|
fn vainfo_low_power_encode_counts() {
|
|
let dump = "VAProfileH264ConstrainedBaseline: VAEntrypointEncSliceLP";
|
|
assert!(vainfo_has_h264_encode(dump));
|
|
}
|
|
|
|
#[test]
|
|
fn vainfo_decode_only_h264_is_not_encode() {
|
|
// Decode-only H.264 (VLD) plus HEVC encode must NOT be read as H.264
|
|
// encode — this is exactly the "default encoder fails" case.
|
|
let dump = "\
|
|
VAProfileH264Main : VAEntrypointVLD
|
|
VAProfileH264High : VAEntrypointVLD
|
|
VAProfileHEVCMain : VAEntrypointEncSlice";
|
|
assert!(!vainfo_has_h264_encode(dump));
|
|
}
|
|
|
|
#[test]
|
|
fn vainfo_empty_is_not_encode() {
|
|
assert!(!vainfo_has_h264_encode(""));
|
|
}
|
|
|
|
#[test]
|
|
fn summarize_counts_fails_and_warns_only() {
|
|
let checks = [
|
|
Check::ok("a", "x"),
|
|
Check::info("b", "x"),
|
|
Check::warn("c", "x"),
|
|
Check::warn("d", "x"),
|
|
Check::fail("e", "x"),
|
|
];
|
|
let summary = summarize(checks.iter());
|
|
assert_eq!(summary, Summary { fails: 1, warns: 2 });
|
|
}
|
|
|
|
#[test]
|
|
fn hosting_verdict_prefers_hardware_then_software() {
|
|
let hw = vec![Section {
|
|
name: "Encode",
|
|
checks: vec![
|
|
Check::ok("hardware H.264", "ok"),
|
|
Check::ok("software H.264", "ok"),
|
|
],
|
|
}];
|
|
assert!(hosting_verdict(&hw).contains("hardware"));
|
|
|
|
let sw = vec![Section {
|
|
name: "Encode",
|
|
checks: vec![
|
|
Check::warn("hardware H.264", "no"),
|
|
Check::ok("software H.264", "ok"),
|
|
],
|
|
}];
|
|
assert!(sw_verdict_uses_no_hwencode(&hosting_verdict(&sw)));
|
|
|
|
let none = vec![Section {
|
|
name: "Encode",
|
|
checks: vec![
|
|
Check::warn("hardware H.264", "no"),
|
|
Check::warn("software H.264", "no"),
|
|
],
|
|
}];
|
|
assert!(hosting_verdict(&none).contains("may fail"));
|
|
}
|
|
|
|
fn sw_verdict_uses_no_hwencode(v: &str) -> bool {
|
|
v.contains("--no-hwencode")
|
|
}
|
|
|
|
#[test]
|
|
fn capture_failure_dominates_verdict() {
|
|
let sections = vec![
|
|
Section {
|
|
name: "Capture (host)",
|
|
checks: vec![Check::fail("X11 capture", "missing")],
|
|
},
|
|
Section {
|
|
name: "Encode",
|
|
checks: vec![Check::ok("hardware H.264", "ok")],
|
|
},
|
|
];
|
|
assert!(hosting_verdict(§ions).contains("capture"));
|
|
}
|
|
}
|