From bd9ec023eefc4b5d26fa8b66c4338e97104f0f96 Mon Sep 17 00:00:00 2001
From: Maze Winther <mazewinther@gmail.com>
Date: Wed, 1 Apr 2026 19:27:49 +0200
Subject: refactor: split constants by domain and isolate timeline panel from
 core

---
 apps/web/src/lib/retime/audio-stretch.ts |  2 +-
 apps/web/src/lib/retime/index.ts         |  1 +
 apps/web/src/lib/retime/presets.ts       |  2 +-
 apps/web/src/lib/retime/rate.ts          | 25 +++++++++++++++++++++++++
 apps/web/src/lib/retime/resolve.ts       |  2 +-
 5 files changed, 29 insertions(+), 3 deletions(-)
 create mode 100644 apps/web/src/lib/retime/rate.ts

(limited to 'apps/web/src/lib/retime')

diff --git a/apps/web/src/lib/retime/audio-stretch.ts b/apps/web/src/lib/retime/audio-stretch.ts
index f8dd297c..92902dff 100644
--- a/apps/web/src/lib/retime/audio-stretch.ts
+++ b/apps/web/src/lib/retime/audio-stretch.ts
@@ -1,5 +1,5 @@
 import { PitchShifter } from "soundtouchjs";
-import { clampRetimeRate, shouldMaintainPitch } from "@/constants/retime-constants";
+import { clampRetimeRate, shouldMaintainPitch } from "@/lib/retime/rate";
 import type { RetimeConfig } from "@/lib/timeline";
 import { getSourceTimeAtClipTime } from "./resolve";
 
diff --git a/apps/web/src/lib/retime/index.ts b/apps/web/src/lib/retime/index.ts
index ca6725dd..2ab1d10f 100644
--- a/apps/web/src/lib/retime/index.ts
+++ b/apps/web/src/lib/retime/index.ts
@@ -1,3 +1,4 @@
+export * from "./rate";
 export * from "./audio-stretch";
 export * from "./presets";
 export * from "./resolve";
diff --git a/apps/web/src/lib/retime/presets.ts b/apps/web/src/lib/retime/presets.ts
index 777c0219..fbd391ff 100644
--- a/apps/web/src/lib/retime/presets.ts
+++ b/apps/web/src/lib/retime/presets.ts
@@ -1,5 +1,5 @@
 import type { RetimeConfig } from "@/lib/timeline";
-import { clampRetimeRate } from "@/constants/retime-constants";
+import { clampRetimeRate } from "@/lib/retime/rate";
 
 export function buildConstantRetime({
 	rate,
diff --git a/apps/web/src/lib/retime/rate.ts b/apps/web/src/lib/retime/rate.ts
new file mode 100644
index 00000000..75ea530b
--- /dev/null
+++ b/apps/web/src/lib/retime/rate.ts
@@ -0,0 +1,25 @@
+export const DEFAULT_RETIME_RATE = 1;
+export const MIN_RETIME_RATE = 0.01;
+export const MAX_RETIME_RATE = 5;
+
+export function clampRetimeRate({ rate }: { rate: number }): number {
+	if (!Number.isFinite(rate) || rate <= 0) {
+		return DEFAULT_RETIME_RATE;
+	}
+
+	return Math.min(Math.max(rate, MIN_RETIME_RATE), MAX_RETIME_RATE);
+}
+
+export function canMaintainPitch({ rate }: { rate: number }): boolean {
+	return Number.isFinite(rate) && rate > 0;
+}
+
+export function shouldMaintainPitch({
+	rate,
+	maintainPitch,
+}: {
+	rate: number;
+	maintainPitch?: boolean;
+}): boolean {
+	return maintainPitch === true && canMaintainPitch({ rate });
+}
diff --git a/apps/web/src/lib/retime/resolve.ts b/apps/web/src/lib/retime/resolve.ts
index 31a562be..5e7236d5 100644
--- a/apps/web/src/lib/retime/resolve.ts
+++ b/apps/web/src/lib/retime/resolve.ts
@@ -1,5 +1,5 @@
 import type { RetimeConfig } from "@/lib/timeline";
-import { clampRetimeRate } from "@/constants/retime-constants";
+import { clampRetimeRate } from "@/lib/retime/rate";
 
 function getSafeRate({ rate }: { rate: number }): number {
 	return clampRetimeRate({ rate });
-- 
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