/**
 * Demofly TTS integration — Kokoro via sherpa-onnx-node native bindings.
 *
 * Parses narration.md, generates per-scene WAV
 * files using OfflineTts, outputs to <projectDir>/audio/<sceneId>.wav.
 */
export interface TtsOptions {
    voice?: string;
    speed?: number;
    lang?: string;
    modelDir?: string;
    sceneFilter?: string;
}
export interface TtsResult {
    sceneId: string;
    filePath: string;
    durationS: number;
    peakMemoryMb: number;
    elapsedS: number;
}
export interface TranscriptScene {
    sceneId: string;
    text: string;
}
/**
 * Parse a narration.md file into per-scene narration text.
 * Extracts plain text from beats, stripping directives like [warmly], [pause: 0.3s],
 * _(silent portion)_ notes, and markdown headers.
 *
 * Scene IDs default to "scene-N" (matching timing.json convention).
 * Override with explicit ID in header: ## Scene 1: Title {#my-custom-id}
 */
/**
 * Parse narration.md — extracts narration text from `<narration>` tags.
 *
 * Only text inside `<narration>...</narration>` is extracted. Everything
 * outside (headers, word budgets, metadata, comments) is ignored.
 *
 * Format:
 *   ## Scene 1: Title
 *   ### Beat 1.1 — Label [at 0ms, window: 5.2s]
 *   **Word budget**: 8 words
 *   <narration>Welcome to the app. It's really simple.</narration>
 */
export declare function parseTranscript(content: string): TranscriptScene[];
/**
 * Generate TTS audio for a single piece of text.
 */
export declare function generateAudio(text: string, outputPath: string, options?: TtsOptions, ttsInstance?: any): TtsResult;
/**
 * Generate TTS for all scenes in a narration document.
 * Accepts narration.md with `<narration>` tag format.
 * Returns array of results and writes WAV files to <projectDir>/audio/.
 */
export declare function generateAllAudio(narrationPath: string, projectDir: string, options?: TtsOptions): TtsResult[];
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