From 71ed46bd844ceb2ca3e95b0fb706b11e77798b55 Mon Sep 17 00:00:00 2001
From: Martin Turoci <martin.turoci@h2o.ai>
Date: Thu, 10 Aug 2023 10:37:07 +0200
Subject: [PATCH] fix: Attempt to sync Safari track. #1601

---
 ui/src/audio_annotator.tsx | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ui/src/audio_annotator.tsx b/ui/src/audio_annotator.tsx
index e0c6a83e6e..a57f42d90b 100644
--- a/ui/src/audio_annotator.tsx
+++ b/ui/src/audio_annotator.tsx
@@ -51,6 +51,7 @@ export interface AudioAnnotator {
 const
   WAVEFORM_HEIGHT = 200,
   BODY_MIN_HEGHT = 370,
+  TRACK_SYNC_OFFSET = 0.05,
   css = stylesheet({
     body: {
       minHeight: BODY_MIN_HEGHT,
@@ -167,7 +168,7 @@ export const XAudioAnnotator = ({ model }: { model: AudioAnnotator }) => {
       }
     },
     onAudioEnded = () => setIsPlaying(false),
-    onTrackChange = (value: F, _range?: [F, F]) => skipToTime(value)(),
+    onTrackChange = (value: F, _range?: [F, F]) => skipToTime(value - (isPlaying ? TRACK_SYNC_OFFSET : 0))(),
     onVolumeChange = (v: F) => {
       if (gainNodeRef.current) gainNodeRef.current.gain.value = v
       setVolumeIcon(v === 0 ? 'VolumeDisabled' : (v < 0.3 ? 'Volume1' : (v < 0.75 ? 'Volume2' : 'Volume3')))
@@ -238,7 +239,7 @@ export const XAudioAnnotator = ({ model }: { model: AudioAnnotator }) => {
               styles={{ root: { minWidth: 180 }, slideBox: { padding: 0 } }}
               // HACK: React doesn't allow for skipping batch updates in 3rd party components. 
               // Add a small offset to sync canvas and slider tracks.
-              value={currentTime + (isPlaying ? 0.05 : 0)}
+              value={currentTime + (isPlaying ? TRACK_SYNC_OFFSET : 0)}
               max={duration}
               step={0.01}
               onChange={onTrackChange}