500 lines
21 KiB
Rust
500 lines
21 KiB
Rust
use std::path::PathBuf;
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use std::sync::{Arc, Mutex};
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use anyhow::{Context, Result};
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use chrono::Utc;
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use lesavka_common::lesavka::{
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CalibrationAction, CalibrationRequest, CalibrationState as ProtoCalibrationState,
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};
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use crate::upstream_media_runtime::UpstreamMediaRuntime;
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pub const FACTORY_MJPEG_AUDIO_OFFSET_US: i64 = 0;
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pub const FACTORY_MJPEG_VIDEO_OFFSET_1280X720_20_US: i64 = 162_659;
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pub const FACTORY_MJPEG_VIDEO_OFFSET_1280X720_30_US: i64 = 135_090;
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pub const FACTORY_MJPEG_VIDEO_OFFSET_1920X1080_20_US: i64 = 160_045;
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pub const FACTORY_MJPEG_VIDEO_OFFSET_1920X1080_30_US: i64 = 127_952;
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pub const FACTORY_MJPEG_AUDIO_MODE_OFFSETS_US: &str =
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"1280x720@20=0,1280x720@30=0,1920x1080@20=0,1920x1080@30=0";
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pub const FACTORY_MJPEG_VIDEO_MODE_OFFSETS_US: &str =
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"1280x720@20=162659,1280x720@30=135090,1920x1080@20=160045,1920x1080@30=127952";
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// Direct UVC/UAC output-delay probes against the lab RC target showed a
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// per-mode sync center for MJPEG/UVC video. This is output-path compensation,
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// not a freshness buffer. The scalar fallback follows the default UVC mode.
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pub const FACTORY_MJPEG_VIDEO_OFFSET_US: i64 = FACTORY_MJPEG_VIDEO_OFFSET_1280X720_30_US;
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const LEGACY_FACTORY_MJPEG_AUDIO_OFFSET_US: i64 = -45_000;
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const PREVIOUS_FACTORY_MJPEG_AUDIO_OFFSET_US: i64 = 720_000;
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const PREVIOUS_TUNED_MJPEG_AUDIO_OFFSET_US: i64 = 1_260_000;
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const PREVIOUS_FACTORY_MJPEG_VIDEO_OFFSET_US: i64 = 0;
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const PREVIOUS_DELAYED_FACTORY_MJPEG_VIDEO_OFFSET_US: i64 = 350_000;
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const PREVIOUS_BROWSER_FACTORY_MJPEG_VIDEO_OFFSET_US: i64 = 130_000;
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const PREVIOUS_SCALAR_FACTORY_MJPEG_VIDEO_OFFSET_US: i64 = 170_000;
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const PREVIOUS_OVERSHOT_FACTORY_MJPEG_VIDEO_OFFSET_US: i64 = 1_090_000;
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const PROFILE: &str = "mjpeg";
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const FACTORY_CONFIDENCE: &str = "factory";
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const PREVIOUS_OFFSET_LIMIT_US: i64 = 500_000;
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const OFFSET_LIMIT_US: i64 = 1_500_000;
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#[derive(Debug, Clone, PartialEq, Eq)]
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struct CalibrationSnapshot {
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profile: String,
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factory_audio_offset_us: i64,
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factory_video_offset_us: i64,
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default_audio_offset_us: i64,
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default_video_offset_us: i64,
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active_audio_offset_us: i64,
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active_video_offset_us: i64,
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source: String,
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confidence: String,
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updated_at: String,
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detail: String,
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}
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#[derive(Debug)]
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pub struct CalibrationStore {
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path: PathBuf,
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runtime: Arc<UpstreamMediaRuntime>,
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state: Mutex<CalibrationSnapshot>,
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}
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impl CalibrationStore {
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/// Keeps `load` explicit because it sits on calibration state, where persisted and factory offsets must stay auditable.
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/// Inputs are the typed parameters; output is the return value or side effect.
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pub fn load(runtime: Arc<UpstreamMediaRuntime>) -> Self {
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let path = calibration_path();
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let state = std::fs::read_to_string(&path)
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.ok()
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.map(|raw| migrate_legacy_snapshot(parse_snapshot(&raw)))
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.unwrap_or_else(snapshot_from_env);
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runtime.set_playout_offsets(state.active_video_offset_us, state.active_audio_offset_us);
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Self {
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path,
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runtime,
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state: Mutex::new(state),
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}
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}
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pub fn current(&self) -> ProtoCalibrationState {
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self.state
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.lock()
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.expect("calibration mutex poisoned")
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.to_proto()
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}
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/// Keeps `apply` explicit because it sits on calibration state, where persisted and factory offsets must stay auditable.
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/// Inputs are the typed parameters; output is the return value or side effect.
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pub fn apply(&self, request: CalibrationRequest) -> Result<ProtoCalibrationState> {
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let mut state = self.state.lock().expect("calibration mutex poisoned");
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let action =
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CalibrationAction::try_from(request.action).unwrap_or(CalibrationAction::Unspecified);
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match action {
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CalibrationAction::Unspecified => {}
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CalibrationAction::RestoreDefault => {
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state.active_audio_offset_us = state.default_audio_offset_us;
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state.active_video_offset_us = state.default_video_offset_us;
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state.source = "default".to_string();
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state.confidence = "saved-default".to_string();
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state.detail = "restored saved upstream A/V calibration".to_string();
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touch(&mut state);
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}
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CalibrationAction::RestoreFactory => {
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state.active_audio_offset_us = state.factory_audio_offset_us;
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state.active_video_offset_us = state.factory_video_offset_us;
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state.source = "factory".to_string();
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state.confidence = FACTORY_CONFIDENCE.to_string();
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state.detail = "restored release-shipped MJPEG upstream calibration".to_string();
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touch(&mut state);
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}
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CalibrationAction::AdjustActive => {
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state.active_audio_offset_us = clamp_offset(
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state
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.active_audio_offset_us
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.saturating_add(request.audio_delta_us),
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);
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state.active_video_offset_us = clamp_offset(
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state
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.active_video_offset_us
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.saturating_add(request.video_delta_us),
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);
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state.source = "manual".to_string();
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state.confidence = "manual".to_string();
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state.detail = format!(
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"manual upstream A/V calibration nudge: audio {:+.1}ms, video {:+.1}ms",
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request.audio_delta_us as f64 / 1000.0,
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request.video_delta_us as f64 / 1000.0
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);
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touch(&mut state);
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}
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CalibrationAction::BlindEstimate => {
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state.active_audio_offset_us = clamp_offset(
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state
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.active_audio_offset_us
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.saturating_add(request.audio_delta_us),
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);
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state.active_video_offset_us = clamp_offset(
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state
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.active_video_offset_us
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.saturating_add(request.video_delta_us),
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);
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state.source = "blind".to_string();
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state.confidence = "estimated".to_string();
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state.detail = if request.note.trim().is_empty() {
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format!(
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"blind estimate applied from relay telemetry: delivery skew {:.1}ms, enqueue skew {:.1}ms",
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request.observed_delivery_skew_ms, request.observed_enqueue_skew_ms
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)
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} else {
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request.note
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};
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touch(&mut state);
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}
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CalibrationAction::SaveActiveAsDefault => {
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state.default_audio_offset_us = state.active_audio_offset_us;
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state.default_video_offset_us = state.active_video_offset_us;
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state.source = "default".to_string();
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state.confidence = "measured".to_string();
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state.detail = "saved current upstream A/V calibration as site default".to_string();
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touch(&mut state);
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}
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}
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self.runtime
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.set_playout_offsets(state.active_video_offset_us, state.active_audio_offset_us);
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persist_snapshot(&self.path, &state)?;
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Ok(state.to_proto())
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}
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/// Keeps `apply_transient_blind_estimate` explicit because it sits on calibration state, where persisted and factory offsets must stay auditable.
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/// Inputs are the typed parameters; output is the return value or side effect.
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pub fn apply_transient_blind_estimate(
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&self,
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audio_delta_us: i64,
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video_delta_us: i64,
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observed_delivery_skew_ms: f32,
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observed_enqueue_skew_ms: f32,
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note: impl Into<String>,
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) -> ProtoCalibrationState {
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let mut state = self.state.lock().expect("calibration mutex poisoned");
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state.active_audio_offset_us =
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clamp_offset(state.active_audio_offset_us.saturating_add(audio_delta_us));
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state.active_video_offset_us =
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clamp_offset(state.active_video_offset_us.saturating_add(video_delta_us));
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state.source = "blind".to_string();
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state.confidence = "runtime-estimated".to_string();
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let note = note.into();
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state.detail = if note.trim().is_empty() {
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format!(
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"transient blind estimate from relay telemetry: delivery skew {:.1}ms, enqueue skew {:.1}ms",
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observed_delivery_skew_ms, observed_enqueue_skew_ms
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)
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} else {
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note
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};
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touch(&mut state);
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self.runtime
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.set_playout_offsets(state.active_video_offset_us, state.active_audio_offset_us);
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state.to_proto()
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}
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}
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impl CalibrationSnapshot {
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/// Keeps `to_proto` explicit because it sits on calibration state, where persisted and factory offsets must stay auditable.
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/// Inputs are the typed parameters; output is the return value or side effect.
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fn to_proto(&self) -> ProtoCalibrationState {
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ProtoCalibrationState {
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profile: self.profile.clone(),
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factory_audio_offset_us: self.factory_audio_offset_us,
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factory_video_offset_us: self.factory_video_offset_us,
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default_audio_offset_us: self.default_audio_offset_us,
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default_video_offset_us: self.default_video_offset_us,
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active_audio_offset_us: self.active_audio_offset_us,
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active_video_offset_us: self.active_video_offset_us,
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source: self.source.clone(),
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confidence: self.confidence.clone(),
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updated_at: self.updated_at.clone(),
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detail: self.detail.clone(),
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}
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}
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}
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pub fn calibration_path() -> PathBuf {
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std::env::var("LESAVKA_CALIBRATION_PATH")
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.ok()
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.filter(|path| !path.trim().is_empty())
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.map(PathBuf::from)
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.unwrap_or_else(|| PathBuf::from("/var/lib/lesavka/calibration.toml"))
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}
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/// Keeps `snapshot_from_env` explicit because it sits on calibration state, where persisted and factory offsets must stay auditable.
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/// Inputs are the typed parameters; output is the return value or side effect.
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fn snapshot_from_env() -> CalibrationSnapshot {
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let mode = current_uvc_mode();
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let factory_audio_offset_us = mode
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.as_deref()
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.and_then(|mode| lookup_mode_offset_us(FACTORY_MJPEG_AUDIO_MODE_OFFSETS_US, mode))
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.unwrap_or(FACTORY_MJPEG_AUDIO_OFFSET_US);
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let factory_video_offset_us = mode
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.as_deref()
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.and_then(|mode| lookup_mode_offset_us(FACTORY_MJPEG_VIDEO_MODE_OFFSETS_US, mode))
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.unwrap_or(FACTORY_MJPEG_VIDEO_OFFSET_US);
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let env_audio = configured_offset_us(
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"LESAVKA_UPSTREAM_AUDIO_PLAYOUT_MODE_OFFSETS_US",
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"LESAVKA_UPSTREAM_AUDIO_PLAYOUT_OFFSET_US",
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mode.as_deref(),
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is_stale_audio_offset_us,
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);
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let env_video = configured_offset_us(
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"LESAVKA_UPSTREAM_VIDEO_PLAYOUT_MODE_OFFSETS_US",
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"LESAVKA_UPSTREAM_VIDEO_PLAYOUT_OFFSET_US",
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mode.as_deref(),
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is_stale_video_offset_us,
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);
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let default_audio_offset_us = env_audio.unwrap_or(factory_audio_offset_us);
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let default_video_offset_us = env_video.unwrap_or(factory_video_offset_us);
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let source = if env_audio.is_some() || env_video.is_some() {
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"env".to_string()
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} else {
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"factory".to_string()
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};
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let confidence = if source == "factory" {
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FACTORY_CONFIDENCE.to_string()
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} else {
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"configured".to_string()
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};
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CalibrationSnapshot {
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profile: PROFILE.to_string(),
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factory_audio_offset_us,
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factory_video_offset_us,
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default_audio_offset_us,
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default_video_offset_us,
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active_audio_offset_us: default_audio_offset_us,
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active_video_offset_us: default_video_offset_us,
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source,
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confidence,
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updated_at: Utc::now().to_rfc3339(),
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detail: "loaded upstream A/V calibration defaults".to_string(),
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}
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}
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/// Keeps `parse_snapshot` explicit because it sits on calibration state, where persisted and factory offsets must stay auditable.
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/// Inputs are the typed parameters; output is the return value or side effect.
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fn parse_snapshot(raw: &str) -> CalibrationSnapshot {
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let fallback = snapshot_from_env();
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let value = |key: &str| -> Option<String> {
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raw.lines().find_map(|line| {
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let trimmed = line.trim();
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let (left, right) = trimmed.split_once('=')?;
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(left.trim() == key).then(|| right.trim().trim_matches('"').to_string())
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})
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};
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let number = |key: &str, default: i64| -> i64 {
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value(key)
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.and_then(|raw| raw.parse::<i64>().ok())
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.map(clamp_offset)
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.unwrap_or(default)
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};
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CalibrationSnapshot {
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profile: value("profile").unwrap_or(fallback.profile),
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factory_audio_offset_us: fallback.factory_audio_offset_us,
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factory_video_offset_us: fallback.factory_video_offset_us,
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default_audio_offset_us: number(
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"default_audio_offset_us",
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fallback.default_audio_offset_us,
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),
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default_video_offset_us: number(
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"default_video_offset_us",
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fallback.default_video_offset_us,
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),
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active_audio_offset_us: number("active_audio_offset_us", fallback.active_audio_offset_us),
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active_video_offset_us: number("active_video_offset_us", fallback.active_video_offset_us),
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source: value("source").unwrap_or(fallback.source),
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confidence: value("confidence").unwrap_or(fallback.confidence),
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updated_at: value("updated_at").unwrap_or(fallback.updated_at),
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detail: value("detail").unwrap_or(fallback.detail),
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}
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}
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/// Keeps `migrate_legacy_snapshot` explicit because it sits on calibration state, where persisted and factory offsets must stay auditable.
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/// Inputs are the typed parameters; output is the return value or side effect.
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fn migrate_legacy_snapshot(mut state: CalibrationSnapshot) -> CalibrationSnapshot {
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let source_allows_migration = matches!(state.source.as_str(), "factory" | "env");
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let confidence_allows_migration = matches!(state.confidence.as_str(), "factory" | "configured");
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let clamped_previous_baseline = matches!(
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state.default_audio_offset_us,
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PREVIOUS_OFFSET_LIMIT_US | OFFSET_LIMIT_US
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) && state
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.detail
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.contains("loaded upstream A/V calibration defaults");
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let untouched_legacy_audio = (is_stale_audio_offset_us(state.default_audio_offset_us)
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|| state.default_audio_offset_us == state.factory_audio_offset_us
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|| clamped_previous_baseline)
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&& state.active_audio_offset_us == state.default_audio_offset_us;
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let untouched_legacy_video = is_stale_video_offset_us(state.default_video_offset_us)
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&& state.active_video_offset_us == state.default_video_offset_us;
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if state.profile == PROFILE
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&& source_allows_migration
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&& confidence_allows_migration
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&& untouched_legacy_audio
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&& untouched_legacy_video
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{
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let old_audio_offset_us = state.default_audio_offset_us;
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let old_video_offset_us = state.default_video_offset_us;
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state.default_audio_offset_us = state.factory_audio_offset_us;
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state.active_audio_offset_us = state.factory_audio_offset_us;
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state.default_video_offset_us = state.factory_video_offset_us;
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state.active_video_offset_us = state.factory_video_offset_us;
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state.source = "factory".to_string();
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state.confidence = FACTORY_CONFIDENCE.to_string();
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state.detail = format!(
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"migrated legacy MJPEG upstream A/V baseline from audio {:+.1}ms/video {:+.1}ms to audio {:+.1}ms/video {:+.1}ms",
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old_audio_offset_us as f64 / 1000.0,
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old_video_offset_us as f64 / 1000.0,
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state.factory_audio_offset_us as f64 / 1000.0,
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state.factory_video_offset_us as f64 / 1000.0
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);
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touch(&mut state);
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}
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state
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}
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/// Keeps `persist_snapshot` explicit because it sits on calibration state, where persisted and factory offsets must stay auditable.
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/// Inputs are the typed parameters; output is the return value or side effect.
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fn persist_snapshot(path: &PathBuf, state: &CalibrationSnapshot) -> Result<()> {
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if let Some(parent) = path.parent() {
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std::fs::create_dir_all(parent)
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.with_context(|| format!("creating calibration directory {}", parent.display()))?;
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}
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std::fs::write(path, serialize_snapshot(state))
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.with_context(|| format!("writing calibration state {}", path.display()))
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}
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/// Keeps `serialize_snapshot` explicit because it sits on calibration state, where persisted and factory offsets must stay auditable.
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/// Inputs are the typed parameters; output is the return value or side effect.
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fn serialize_snapshot(state: &CalibrationSnapshot) -> String {
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format!(
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"profile=\"{}\"\ndefault_audio_offset_us={}\ndefault_video_offset_us={}\nactive_audio_offset_us={}\nactive_video_offset_us={}\nsource=\"{}\"\nconfidence=\"{}\"\nupdated_at=\"{}\"\ndetail=\"{}\"\n",
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escape_value(&state.profile),
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state.default_audio_offset_us,
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state.default_video_offset_us,
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state.active_audio_offset_us,
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state.active_video_offset_us,
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escape_value(&state.source),
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escape_value(&state.confidence),
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escape_value(&state.updated_at),
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escape_value(&state.detail),
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)
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}
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fn touch(state: &mut CalibrationSnapshot) {
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state.updated_at = Utc::now().to_rfc3339();
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}
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fn configured_offset_us(
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mode_map_name: &str,
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scalar_name: &str,
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mode: Option<&str>,
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is_stale_scalar: impl Fn(i64) -> bool,
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) -> Option<i64> {
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mode.and_then(|mode| env_mode_offset_us(mode_map_name, mode))
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.or_else(|| env_i64(scalar_name).filter(|offset| !is_stale_scalar(*offset)))
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}
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/// Keeps `current_uvc_mode` explicit because it sits on calibration state, where persisted and factory offsets must stay auditable.
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/// Inputs are the typed parameters; output is the return value or side effect.
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fn current_uvc_mode() -> Option<String> {
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env_mode("UVC_MODE")
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.or_else(|| env_mode("LESAVKA_UVC_MODE"))
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.or_else(|| {
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let width = env_u32("LESAVKA_UVC_WIDTH")?;
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let height = env_u32("LESAVKA_UVC_HEIGHT")?;
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let fps = env_u32("LESAVKA_UVC_FPS")
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.or_else(|| {
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env_u32("LESAVKA_UVC_INTERVAL")
|
|
.and_then(|interval| (interval > 0).then_some(10_000_000 / interval))
|
|
})?
|
|
.max(1);
|
|
Some(format!("{width}x{height}@{fps}"))
|
|
})
|
|
.or_else(|| {
|
|
let width = env_u32("LESAVKA_CAM_WIDTH")?;
|
|
let height = env_u32("LESAVKA_CAM_HEIGHT")?;
|
|
let fps = env_u32("LESAVKA_CAM_FPS")?.max(1);
|
|
Some(format!("{width}x{height}@{fps}"))
|
|
})
|
|
}
|
|
|
|
/// Keeps `env_mode` explicit because it sits on calibration state, where persisted and factory offsets must stay auditable.
|
|
/// Inputs are the typed parameters; output is the return value or side effect.
|
|
fn env_mode(name: &str) -> Option<String> {
|
|
std::env::var(name).ok().and_then(|value| {
|
|
let trimmed = value.trim();
|
|
let valid = trimmed.split_once('@').and_then(|(size, fps)| {
|
|
let (width, height) = size.split_once('x')?;
|
|
width.parse::<u32>().ok()?;
|
|
height.parse::<u32>().ok()?;
|
|
fps.parse::<u32>().ok()?;
|
|
Some(())
|
|
});
|
|
valid.map(|()| trimmed.to_string())
|
|
})
|
|
}
|
|
|
|
fn env_mode_offset_us(name: &str, mode: &str) -> Option<i64> {
|
|
std::env::var(name)
|
|
.ok()
|
|
.and_then(|map| lookup_mode_offset_us(&map, mode))
|
|
}
|
|
|
|
fn lookup_mode_offset_us(map: &str, mode: &str) -> Option<i64> {
|
|
map.split(',').find_map(|entry| {
|
|
let (key, value) = entry.trim().split_once('=')?;
|
|
(key.trim() == mode)
|
|
.then(|| value.trim().parse::<i64>().ok().map(clamp_offset))
|
|
.flatten()
|
|
})
|
|
}
|
|
|
|
fn env_i64(name: &str) -> Option<i64> {
|
|
std::env::var(name)
|
|
.ok()
|
|
.and_then(|value| value.trim().parse::<i64>().ok())
|
|
.map(clamp_offset)
|
|
}
|
|
|
|
fn env_u32(name: &str) -> Option<u32> {
|
|
std::env::var(name)
|
|
.ok()
|
|
.and_then(|value| value.trim().parse::<u32>().ok())
|
|
}
|
|
|
|
fn is_stale_audio_offset_us(offset: i64) -> bool {
|
|
matches!(
|
|
offset,
|
|
LEGACY_FACTORY_MJPEG_AUDIO_OFFSET_US
|
|
| PREVIOUS_FACTORY_MJPEG_AUDIO_OFFSET_US
|
|
| PREVIOUS_TUNED_MJPEG_AUDIO_OFFSET_US
|
|
)
|
|
}
|
|
|
|
fn is_stale_video_offset_us(offset: i64) -> bool {
|
|
matches!(
|
|
offset,
|
|
PREVIOUS_FACTORY_MJPEG_VIDEO_OFFSET_US
|
|
| PREVIOUS_DELAYED_FACTORY_MJPEG_VIDEO_OFFSET_US
|
|
| PREVIOUS_BROWSER_FACTORY_MJPEG_VIDEO_OFFSET_US
|
|
| PREVIOUS_SCALAR_FACTORY_MJPEG_VIDEO_OFFSET_US
|
|
| PREVIOUS_OVERSHOT_FACTORY_MJPEG_VIDEO_OFFSET_US
|
|
)
|
|
}
|
|
|
|
fn clamp_offset(value: i64) -> i64 {
|
|
value.clamp(-OFFSET_LIMIT_US, OFFSET_LIMIT_US)
|
|
}
|
|
|
|
fn escape_value(value: &str) -> String {
|
|
value.replace('\\', "\\\\").replace('"', "\\\"")
|
|
}
|
|
|
|
#[cfg(test)]
|
|
#[path = "calibration/tests/mod.rs"]
|
|
mod tests;
|