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Made-with: Cursor

openclaw/extensions/google/music-generation-provider.ts

@@ -0,0 +1,176 @@
+import { GoogleGenAI } from "@google/genai";
+import { extensionForMime } from "openclaw/plugin-sdk/media-mime";
+import type {
+  GeneratedMusicAsset,
+  MusicGenerationProvider,
+  MusicGenerationRequest,
+} from "openclaw/plugin-sdk/music-generation";
+import { resolveApiKeyForProvider } from "openclaw/plugin-sdk/provider-auth-runtime";
+import { normalizeOptionalString } from "openclaw/plugin-sdk/text-runtime";
+import { normalizeGoogleApiBaseUrl } from "./api.js";
+import {
+  createGoogleMusicGenerationProviderMetadata,
+  DEFAULT_GOOGLE_MUSIC_MODEL,
+  GOOGLE_MAX_INPUT_IMAGES,
+  GOOGLE_PRO_MUSIC_MODEL,
+} from "./generation-provider-metadata.js";
+
+const DEFAULT_TIMEOUT_MS = 180_000;
+
+type GoogleInlineDataPart = {
+  mimeType?: string;
+  mime_type?: string;
+  data?: string;
+};
+
+type GoogleGenerateMusicResponse = {
+  candidates?: Array<{
+    content?: {
+      parts?: Array<{
+        text?: string;
+        inlineData?: GoogleInlineDataPart;
+        inline_data?: GoogleInlineDataPart;
+      }>;
+    };
+  }>;
+};
+
+function resolveConfiguredGoogleMusicBaseUrl(req: MusicGenerationRequest): string | undefined {
+  const configured = normalizeOptionalString(req.cfg?.models?.providers?.google?.baseUrl);
+  return configured ? normalizeGoogleApiBaseUrl(configured) : undefined;
+}
+
+function buildMusicPrompt(req: MusicGenerationRequest): string {
+  const parts = [req.prompt.trim()];
+  const lyrics = normalizeOptionalString(req.lyrics);
+  if (req.instrumental === true) {
+    parts.push("Instrumental only. No vocals, no sung lyrics, no spoken word.");
+  }
+  if (lyrics) {
+    parts.push(`Lyrics:\n${lyrics}`);
+  }
+  return parts.join("\n\n");
+}
+
+function resolveSupportedFormats(model: string): readonly string[] {
+  return model === GOOGLE_PRO_MUSIC_MODEL ? ["mp3", "wav"] : ["mp3"];
+}
+
+function resolveTrackFileName(params: { index: number; mimeType: string; model: string }): string {
+  const ext =
+    extensionForMime(params.mimeType)?.replace(/^\./u, "") ||
+    (params.model === GOOGLE_PRO_MUSIC_MODEL ? "wav" : "mp3");
+  return `track-${params.index + 1}.${ext}`;
+}
+
+function extractTracks(params: { payload: GoogleGenerateMusicResponse; model: string }): {
+  tracks: GeneratedMusicAsset[];
+  lyrics: string[];
+} {
+  const lyrics: string[] = [];
+  const tracks: GeneratedMusicAsset[] = [];
+  for (const candidate of params.payload.candidates ?? []) {
+    for (const part of candidate.content?.parts ?? []) {
+      const text = normalizeOptionalString(part.text);
+      if (text) {
+        lyrics.push(text);
+        continue;
+      }
+      const inline = part.inlineData ?? part.inline_data;
+      const data = normalizeOptionalString(inline?.data);
+      if (!data) {
+        continue;
+      }
+      const mimeType =
+        normalizeOptionalString(inline?.mimeType) ||
+        normalizeOptionalString(inline?.mime_type) ||
+        "audio/mpeg";
+      tracks.push({
+        buffer: Buffer.from(data, "base64"),
+        mimeType,
+        fileName: resolveTrackFileName({
+          index: tracks.length,
+          mimeType,
+          model: params.model,
+        }),
+      });
+    }
+  }
+  return { tracks, lyrics };
+}
+
+export function buildGoogleMusicGenerationProvider(): MusicGenerationProvider {
+  return {
+    ...createGoogleMusicGenerationProviderMetadata(),
+    async generateMusic(req) {
+      if ((req.inputImages?.length ?? 0) > GOOGLE_MAX_INPUT_IMAGES) {
+        throw new Error(
+          `Google music generation supports at most ${GOOGLE_MAX_INPUT_IMAGES} reference images.`,
+        );
+      }
+      const auth = await resolveApiKeyForProvider({
+        provider: "google",
+        cfg: req.cfg,
+        agentDir: req.agentDir,
+        store: req.authStore,
+      });
+      if (!auth.apiKey) {
+        throw new Error("Google API key missing");
+      }
+
+      const model = normalizeOptionalString(req.model) || DEFAULT_GOOGLE_MUSIC_MODEL;
+      if (req.format) {
+        const supportedFormats = resolveSupportedFormats(model);
+        if (!supportedFormats.includes(req.format)) {
+          throw new Error(
+            `Google music generation model ${model} supports ${supportedFormats.join(", ")} output.`,
+          );
+        }
+      }
+
+      const client = new GoogleGenAI({
+        apiKey: auth.apiKey,
+        httpOptions: {
+          ...(resolveConfiguredGoogleMusicBaseUrl(req)
+            ? { baseUrl: resolveConfiguredGoogleMusicBaseUrl(req) }
+            : {}),
+          timeout: req.timeoutMs ?? DEFAULT_TIMEOUT_MS,
+        },
+      });
+      const response = (await client.models.generateContent({
+        model,
+        contents: [
+          { text: buildMusicPrompt(req) },
+          ...(req.inputImages ?? []).map((image) => ({
+            inlineData: {
+              mimeType: normalizeOptionalString(image.mimeType) || "image/png",
+              data: image.buffer?.toString("base64") ?? "",
+            },
+          })),
+        ],
+        config: {
+          responseModalities: ["AUDIO", "TEXT"],
+        },
+      })) as GoogleGenerateMusicResponse;
+
+      const { tracks, lyrics } = extractTracks({
+        payload: response,
+        model,
+      });
+      if (tracks.length === 0) {
+        throw new Error("Google music generation response missing audio data");
+      }
+      return {
+        tracks,
+        ...(lyrics.length > 0 ? { lyrics } : {}),
+        model,
+        metadata: {
+          inputImageCount: req.inputImages?.length ?? 0,
+          instrumental: req.instrumental === true,
+          ...(normalizeOptionalString(req.lyrics) ? { requestedLyrics: true } : {}),
+          ...(req.format ? { requestedFormat: req.format } : {}),
+        },
+      };
+    },
+  };
+}