@aituber-onair/voice/dist/cjs/engines/OpenAiEngine.js

Voice synthesis library for AITuber OnAir

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.OpenAiEngine = void 0;
const voiceEngine_1 = require("../constants/voiceEngine");
/**
 * OpenAI TTS voice synthesis engine
 */
class OpenAiEngine {
    constructor() {
        this.speed = 1.0;
        this.model = 'tts-1';
    }
    /**
     * Set speaking speed (0.25 - 4.0)
     */
    setSpeed(speed) {
        const clamped = Math.max(0.25, Math.min(4.0, speed));
        this.speed = Number.isFinite(clamped) ? clamped : 1.0;
    }
    /**
     * Set TTS model (tts-1, tts-1-hd, gpt-4o-mini-tts)
     */
    setModel(model) {
        const trimmed = model.trim();
        this.model = trimmed.length > 0 ? trimmed : 'tts-1';
    }
    async fetchAudio(input, speaker, apiKey) {
        if (!apiKey) {
            throw new Error('OpenAI API key is required');
        }
        if (!speaker) {
            throw new Error('OpenAI TTS voice name is required');
        }
        const talk = input;
        const text = talk.message.trim();
        if (!text) {
            throw new Error('Input text is empty');
        }
        const response = await fetch(voiceEngine_1.OPENAI_TTS_API_URL, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                Authorization: `Bearer ${apiKey}`,
            },
            body: JSON.stringify({
                model: this.model,
                voice: speaker,
                input: text,
                speed: this.speed,
            }),
        });
        if (!response.ok) {
            const errorText = await response.text().catch(() => '');
            console.error('Failed to fetch TTS from OpenAI TTS:', response.status, errorText);
            throw new Error('Failed to fetch TTS from OpenAI TTS.');
        }
        const blob = await response.blob();
        return await blob.arrayBuffer();
    }
    getTestMessage(textVoiceText) {
        return textVoiceText || 'OpenAI TTSを使用します';
    }
}
exports.OpenAiEngine = OpenAiEngine;