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tune(sync): add hdmi audio holdback default

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This commit is contained in:
Brad Stein 2026-04-27 02:56:07 -03:00
parent f8e53d5969
commit 55ef0f4d32
7 changed files with 14 additions and 13 deletions
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6
Cargo.lock generated
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@ -1642,7 +1642,7 @@ checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
[[package]]
name = "lesavka_client"
version = "0.14.12"
version = "0.14.13"
dependencies = [
"anyhow",
"async-stream",
@ -1676,7 +1676,7 @@ dependencies = [
[[package]]
name = "lesavka_common"
version = "0.14.12"
version = "0.14.13"
dependencies = [
"anyhow",
"base64",
@ -1688,7 +1688,7 @@ dependencies = [
[[package]]
name = "lesavka_server"
version = "0.14.12"
version = "0.14.13"
dependencies = [
"anyhow",
"base64",

2
client/Cargo.toml
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@ -4,7 +4,7 @@ path = "src/main.rs"
[package]
name = "lesavka_client"
version = "0.14.12"
version = "0.14.13"
edition = "2024"
[dependencies]

2
common/Cargo.toml
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@ -1,6 +1,6 @@
[package]
name = "lesavka_common"
version = "0.14.12"
version = "0.14.13"
edition = "2024"
build = "build.rs"

2
docs/operational-env.md
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@ -185,7 +185,7 @@ Hardware-facing assumptions belong near the code that uses them; this file is th
| `LESAVKA_UAC_BUFFER_TIME_US` | server audio sink latency override |
| `LESAVKA_UAC_COMPENSATION_US` | server audio sink latency override |
| `LESAVKA_UAC_DEV` | server hardware/device override |
| `LESAVKA_UAC_HDMI_COMPENSATION_US` | server HDMI audio sink latency override |
| `LESAVKA_UAC_HDMI_COMPENSATION_US` | server HDMI audio sink latency override; defaults to `205000` to hold gadget audio back toward the host-observed HDMI video path |
| `LESAVKA_UAC_LATENCY_TIME_US` | server audio sink latency override |
| `LESAVKA_UAC_SESSION_CLOCK_ALIGN` | server audio sink clock-alignment override; defaults to `0` |
| `LESAVKA_TEST_CAM_U32` | test/build contract variable; not runtime operator config |

2
scripts/install/server.sh
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@ -492,7 +492,7 @@ fi
printf 'LESAVKA_HDMI_PRESENTATION_DELAY_US=%s\n' "${LESAVKA_HDMI_PRESENTATION_DELAY_US:-180000}"
printf 'LESAVKA_UAC_DEV=%s\n' "${LESAVKA_UAC_DEV:-hw:UAC2Gadget,0}"
printf 'LESAVKA_ALSA_DEV=%s\n' "${LESAVKA_ALSA_DEV:-hw:UAC2Gadget,0}"
printf 'LESAVKA_UAC_HDMI_COMPENSATION_US=%s\n' "${LESAVKA_UAC_HDMI_COMPENSATION_US:-0}"
printf 'LESAVKA_UAC_HDMI_COMPENSATION_US=%s\n' "${LESAVKA_UAC_HDMI_COMPENSATION_US:-205000}"
printf 'LESAVKA_UAC_SESSION_CLOCK_ALIGN=%s\n' "${LESAVKA_UAC_SESSION_CLOCK_ALIGN:-0}"
printf 'LESAVKA_UPSTREAM_PLAYOUT_DELAY_MS=%s\n' "${LESAVKA_UPSTREAM_PLAYOUT_DELAY_MS:-1000}"
printf 'LESAVKA_UPSTREAM_AUDIO_PLAYOUT_OFFSET_US=%s\n' "${LESAVKA_UPSTREAM_AUDIO_PLAYOUT_OFFSET_US:-0}"

2
server/Cargo.toml
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@ -10,7 +10,7 @@ bench = false
[package]
name = "lesavka_server"
version = "0.14.12"
version = "0.14.13"
edition = "2024"
autobins = false

11
server/src/audio/voice_input.rs
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@ -86,9 +86,10 @@ fn voice_sink_compensation_us() -> i64 {
fn default_voice_sink_compensation_us() -> i64 {
let cfg = crate::camera::current_camera_config();
if cfg.output == crate::camera::CameraOutput::Hdmi {
// HDMI now prefers MJPEG on hosts without hardware H.264 decode, which
// removed the old video-side lag that justified the large audio pad.
non_negative_voice_sink_timing_env("LESAVKA_UAC_HDMI_COMPENSATION_US", 0)
// Bench captures on the real HDMI/UAC host path still show gadget audio
// arriving about 205 ms ahead of the HDMI camera feed once the shared
// upstream playout is stable, so keep a modest default audio holdback.
non_negative_voice_sink_timing_env("LESAVKA_UAC_HDMI_COMPENSATION_US", 205_000)
} else {
0
}
@ -413,8 +414,8 @@ mod voice_sink_timing_tests {
temp_env::with_var_unset("LESAVKA_UAC_HDMI_COMPENSATION_US", || {
temp_env::with_var("LESAVKA_CAM_OUTPUT", Some("hdmi"), || {
update_camera_config();
assert_eq!(default_voice_sink_compensation_us(), 0);
assert_eq!(voice_sink_compensation_us(), 0);
assert_eq!(default_voice_sink_compensation_us(), 205_000);
assert_eq!(voice_sink_compensation_us(), 205_000);
});
});
});