auto-save 2026-05-18 23:55 (+5, ~9)

src/lib/videoProviders.ts

@@ -0,0 +1,87 @@
+import type { VideoGenerationRequest, VideoGenerationResponse } from './types';
+
+export const SEEDANCE_MODEL = process.env.SEEDANCE_MODEL || 'seedance-1-0-pro';
+const SEEDANCE_API_BASE = process.env.SEEDANCE_API_BASE || 'https://ark.cn-beijing.volces.com/api/v3';
+
+function durationOrDefault(duration?: number): number {
+  return Math.min(Math.max(duration ?? 6, 3), 10);
+}
+
+function normalizeStatus(status?: string): VideoGenerationResponse['status'] {
+  if (status === 'succeeded') return 'succeeded';
+  if (status === 'failed') return 'failed';
+  if (status === 'processing' || status === 'running') return 'processing';
+  return 'submitted';
+}
+
+export async function generateSeedanceVideo(opts: VideoGenerationRequest): Promise<VideoGenerationResponse> {
+  const key = process.env.SEEDANCE_API_KEY;
+  if (!key) throw new Error('SEEDANCE_API_KEY missing');
+  if (!opts.prompt?.trim()) throw new Error('prompt required');
+
+  const content: Array<Record<string, unknown>> = [{ type: 'text', text: opts.prompt.trim() }];
+  if (opts.imageUrl) {
+    content.push({ type: 'image_url', image_url: { url: opts.imageUrl } });
+  }
+
+  const res = await fetch(`${SEEDANCE_API_BASE}/contents/generations/tasks`, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+      Authorization: `Bearer ${key}`,
+    },
+    body: JSON.stringify({
+      model: SEEDANCE_MODEL,
+      content,
+      duration: durationOrDefault(opts.duration),
+      ratio: opts.ratio || '16:9',
+      resolution: opts.resolution || '1080p',
+    }),
+  });
+
+  if (!res.ok) throw new Error(`Seedance ${res.status}: ${await res.text()}`);
+  const raw = await res.json() as {
+    id?: string;
+    task_id?: string;
+    status?: string;
+    video_url?: string;
+    output?: { video_url?: string; url?: string };
+  };
+
+  return {
+    provider: 'seedance',
+    model: SEEDANCE_MODEL,
+    taskId: raw.task_id || raw.id,
+    status: normalizeStatus(raw.status),
+    videoUrl: raw.video_url || raw.output?.video_url || raw.output?.url,
+    raw,
+  };
+}
+
+export async function getSeedanceVideoTask(taskId: string): Promise<VideoGenerationResponse> {
+  const key = process.env.SEEDANCE_API_KEY;
+  if (!key) throw new Error('SEEDANCE_API_KEY missing');
+  if (!taskId) throw new Error('taskId required');
+
+  const res = await fetch(`${SEEDANCE_API_BASE}/contents/generations/tasks/${encodeURIComponent(taskId)}`, {
+    headers: { Authorization: `Bearer ${key}` },
+  });
+
+  if (!res.ok) throw new Error(`Seedance ${res.status}: ${await res.text()}`);
+  const raw = await res.json() as {
+    id?: string;
+    task_id?: string;
+    status?: string;
+    video_url?: string;
+    output?: { video_url?: string; url?: string };
+  };
+
+  return {
+    provider: 'seedance',
+    model: SEEDANCE_MODEL,
+    taskId: raw.task_id || raw.id || taskId,
+    status: normalizeStatus(raw.status),
+    videoUrl: raw.video_url || raw.output?.video_url || raw.output?.url,
+    raw,
+  };
+}