增加即梦图片5.0和视频2.5的能力

lib/seedance/client.ts

@@ -1,9 +1,13 @@
 import { materialContentForProvider, type PromptMaterial } from "@/lib/prompt/assembler";
 import {
+  SEEDANCE_20_MODEL,
   VIDEO_DURATION_DEFAULT,
   VIDEO_RATIO_DEFAULT,
   VIDEO_RESOLUTION_DEFAULT,
   clampVideoDuration,
+  isSeedance25Model,
+  isSupportedSeedanceModel,
+  normalizeSeedanceModel,
   normalizeVideoDuration,
   normalizeVideoRatio,
   normalizeVideoResolution
@@ -16,6 +20,7 @@ export type SeedanceSettings = {
 };
 
 export type SeedanceCreateInput = {
+  model?: string;
   prompt: string;
   settings: SeedanceSettings;
   materials: PromptMaterial[];
@@ -35,13 +40,13 @@ export type SeedanceUsage = {
 };
 
 export function getSeedanceConfig() {
-  const model = process.env.SEEDANCE_MODEL || "doubao-seedance-2-0-260128";
+  const model = normalizeSeedanceModel(process.env.SEEDANCE_MODEL, SEEDANCE_20_MODEL);
   return {
     apiKey: process.env.SEEDANCE_API_KEY,
     baseUrl: process.env.SEEDANCE_BASE_URL || "https://ark.cn-beijing.volces.com/api/v3",
     model,
     ratio: normalizeVideoRatio(process.env.SEEDANCE_RATIO, VIDEO_RATIO_DEFAULT),
-    duration: clampVideoDuration(process.env.SEEDANCE_DURATION, VIDEO_DURATION_DEFAULT),
+    duration: clampVideoDuration(process.env.SEEDANCE_DURATION, VIDEO_DURATION_DEFAULT, { model }),
     resolution: normalizeVideoResolution(process.env.SEEDANCE_RESOLUTION, model, VIDEO_RESOLUTION_DEFAULT)
   };
 }
@@ -49,20 +54,26 @@ export function getSeedanceConfig() {
 export async function createSeedanceTask(input: SeedanceCreateInput) {
   const config = getSeedanceConfig();
   if (!config.apiKey) throw new Error("缺少 SEEDANCE_API_KEY。请在 .env.local 配置火山方舟 API Key。");
+  if (input.model !== undefined && !isSupportedSeedanceModel(input.model)) {
+    throw new Error("不支持的 Seedance 视频模型。");
+  }
+  const model = normalizeSeedanceModel(input.model, config.model);
   const materialContent = materialContentForProvider(input.materials, input.origin);
-  if (materialContent.length > 4) {
+  if (!isSeedance25Model(model) && materialContent.length > 4) {
     throw new Error("Seedance 2.0 最多支持 4 个素材（加上文本后 content 最多 5 项）。");
   }
+  if (isSeedance25Model(model)) validateSeedance25Materials(input.materials);
   const payload = {
-    model: config.model,
+    model,
     content: [
       { type: "text", text: input.prompt },
       ...materialContent
     ],
     generate_audio: true,
+    ...(isSeedance25Model(model) && materialContent.length > 0 ? { omni_reference_task_type: "auto" } : {}),
     ratio: normalizeVideoRatio(input.settings.ratio, config.ratio),
-    duration: normalizeVideoDuration(input.settings.duration) ?? config.duration,
-    resolution: normalizeVideoResolution(input.settings.resolution, config.model, config.resolution),
+    duration: normalizeVideoDuration(input.settings.duration, model) ?? config.duration,
+    resolution: normalizeVideoResolution(input.settings.resolution, model, config.resolution),
     watermark: false
   };
   const response = await fetch(`${config.baseUrl.replace(/\/$/, "")}/contents/generations/tasks`, {
@@ -84,6 +95,16 @@ export async function createSeedanceTask(input: SeedanceCreateInput) {
   };
 }
 
+function validateSeedance25Materials(materials: PromptMaterial[]) {
+  const counts = materials.reduce((result, material) => {
+    result[material.type] += 1;
+    return result;
+  }, { image: 0, video: 0, audio: 0 });
+  if (counts.image > 30 || counts.video > 10 || counts.audio > 10 || materials.length > 50) {
+    throw new Error("Seedance 2.5 最多支持 30 张图片、10 个视频和 10 个音频素材。");
+  }
+}
+
 export async function querySeedanceTask(providerTaskId: string): Promise<SeedanceQueryResult> {
   const config = getSeedanceConfig();
   if (!config.apiKey) throw new Error("缺少 SEEDANCE_API_KEY，无法查询真实生成任务。");