/**
 * Google's embedding wire format, shared by the synchronous adapter and the batch tier: task types,
 * the text prefixes gemini-embedding-2 reads instead, and parts.
 */
import type { EmbeddingInputType, EmbeddingProviderPart } from '../types/embeddings.js';
/** Google's task type for each input type, on the models that take one. */
export declare const GOOGLE_TASK_TYPES: Record<EmbeddingInputType, string>;
/** Whether a model reads its task from a text prefix rather than a task type, as gemini-embedding-2 does. */
export declare function usesTaskPrefix(model: string): boolean;
/**
 * An input's parts as Google's: text as text, the first carrying the task prefix when one is given,
 * and media inline, or by a Files API URI. Google does not fetch any other URL.
 */
export declare function googleParts(parts: readonly EmbeddingProviderPart[], prefixFor: EmbeddingInputType | undefined): ({
    text: string;
    inlineData?: undefined;
    fileData?: undefined;
} | {
    inlineData: {
        mimeType: string;
        data: string;
    };
    text?: undefined;
    fileData?: undefined;
} | {
    fileData: {
        mimeType: string;
        fileUri: string;
    };
    text?: undefined;
    inlineData?: undefined;
})[];