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

frontend/lib/genspace-multi-keyframe.ts

@@ -0,0 +1,81 @@
+export type GenSpaceMode =
+  | 'image'
+  | 'video'
+  | 'multi-keyframe'
+  | 'retake'
+  | 'extend'
+  | 'ic-lora'
+
+export function autoDurationOptionVisible(
+  mode: GenSpaceMode,
+  autoDurationAvailable: boolean,
+): boolean {
+  return mode !== 'multi-keyframe' && autoDurationAvailable
+}
+
+type MultiKeyframeCapabilities = {
+  multi_keyframe?: boolean
+}
+
+type ModeAvailability = {
+  canUseMultiKeyframe: boolean
+  canUseRetake: boolean
+  canUseExtend: boolean
+  canUseIcLora: boolean
+}
+
+export function canUseMultiKeyframeMode({
+  isLocalMode,
+  localCaps,
+  enableMultipleKeyframesVideos,
+}: {
+  isLocalMode: boolean
+  localCaps?: MultiKeyframeCapabilities | null
+  enableMultipleKeyframesVideos: boolean
+}): boolean {
+  return enableMultipleKeyframesVideos && isLocalMode && Boolean(localCaps?.multi_keyframe)
+}
+
+export function fallbackGenSpaceMode(
+  mode: GenSpaceMode,
+  availability: ModeAvailability,
+): GenSpaceMode {
+  if (mode === 'multi-keyframe' && !availability.canUseMultiKeyframe) return 'video'
+  if (mode === 'retake' && !availability.canUseRetake) return 'video'
+  if (mode === 'extend' && !availability.canUseExtend) return 'video'
+  if (mode === 'ic-lora' && !availability.canUseIcLora) return 'video'
+  return mode
+}
+
+export function modeOptionValues({
+  canUseMultiKeyframe,
+  canUseRetake,
+  canUseExtend,
+  canUseIcLora,
+}: ModeAvailability): GenSpaceMode[] {
+  return [
+    'image',
+    'video',
+    ...(canUseMultiKeyframe ? (['multi-keyframe'] as const) : []),
+    ...(canUseRetake ? (['retake'] as const) : []),
+    ...(canUseExtend ? (['extend'] as const) : []),
+    ...(canUseIcLora ? (['ic-lora'] as const) : []),
+  ]
+}
+
+export function isGenSpaceLibraryMode(mode: GenSpaceMode): boolean {
+  return mode === 'video' || mode === 'image'
+}
+
+export function modeAfterCompletedGeneration(generationMode: string): GenSpaceMode | null {
+  return generationMode === 'multi-keyframe' ? 'video' : null
+}
+
+export function isEnhanceAvailableForMode(mode: GenSpaceMode): boolean {
+  return mode === 'video' || mode === 'ic-lora' || mode === 'image' || mode === 'multi-keyframe'
+}
+
+/** Multi-keyframe cannot combine with A2V — leftover audio must not pick A2V envelopes or go on the wire. */
+export function genSpaceUsesAudioInput(mode: GenSpaceMode): boolean {
+  return mode === 'video'
+}