Create standalone browser port of LTX Athena with authenticated native API transport

2026-09-29 17:59:23 +02:00
commit 1333b0c36b
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+// Resolution tier options for local retake/extend. Offers the source resolution plus
+// standard lower tiers (named by short edge: 1080p / 720p / 540p). Grid sizes such as
+// 576/704/1088 map to the nearest named tier. The backend snaps the chosen size to a
+// valid (÷32, not-upscaled) resolution. Local only — the cloud preserves source resolution.
+
+export interface ResolutionOption {
+  key: string
+  label: string
+  // null = "Original" (backend uses the source resolution, still ÷32-corrected).
+  width: number | null
+  height: number | null
+}
+
+const STANDARD_TIERS = [1080, 720, 540]
+const NAMED_TIERS = [2160, 1440, 1080, 720, 540] as const
+
+/** Map a pixel short-edge (incl. /64 grid sizes like 576, 704, 1088) to the picker tier name. */
+export function namedResolutionTier(shortEdge: number): (typeof NAMED_TIERS)[number] {
+  return NAMED_TIERS.reduce((best, tier) =>
+    Math.abs(tier - shortEdge) < Math.abs(best - shortEdge) ? tier : best,
+  )
+}
+
+export function namedResolutionDisplayName(tier: number): string {
+  return tier >= 2160 ? '4K' : `${tier}p`
+}
+
+/** Display label for generation resolution ids (`2160p` → `4K`). */
+export function videoGenerationResolutionLabel(resolution: string): string {
+  return resolution === '2160p' ? '4K' : resolution
+}
+
+export function resolutionOptions(width: number, height: number): ResolutionOption[] {
+  if (!width || !height) return []
+  const shortEdge = Math.min(width, height)
+  const longEdge = Math.max(width, height)
+  const portrait = height > width
+
+  const originalTier = namedResolutionTier(shortEdge)
+
+  const options: ResolutionOption[] = [
+    { key: 'original', label: `${namedResolutionDisplayName(originalTier)} (Original)`, width: null, height: null },
+  ]
+  for (const tier of STANDARD_TIERS) {
+    // Only smaller tiers, and drop the one that already maps to Original.
+    if (tier >= shortEdge || tier === originalTier) continue
+    const long = Math.round((longEdge * tier) / shortEdge)
+    options.push({
+      key: String(tier),
+      label: `${tier}p`,
+      width: portrait ? tier : long,
+      height: portrait ? long : tier,
+    })
+  }
+  return options
+}