export interface Voice {
character: string;
name: string;
id: number;
}
export interface AudioQuery {
speedScale: number;
[key: string]: any;
}
export class VoiceVoxService {
constructor(private baseUrl: string) {}
async getVoices(): Promise<Voice[]> {
const response = await fetch(`${this.baseUrl}/speakers`);
const speakers = await response.json() as any[];
const voices: Voice[] = [];
for (const speaker of speakers) {
for (const style of speaker.styles) {
voices.push({
character: speaker.name,
name: style.name,
id: style.id,
});
}
}
return voices;
}
async synthesize(
text: string,
voiceId: number,
speed: number,
): Promise<Buffer> {
// 音声クエリを作成
const queryResponse = await fetch(
`${this.baseUrl}/audio_query?speaker=${voiceId}&text=${
encodeURIComponent(text)
}`,
{ method: "POST" },
);
if (!queryResponse.ok) {
throw new Error(
`Failed to create audio query: ${queryResponse.statusText}`,
);
}
const query = await queryResponse.json() as AudioQuery;
// 話速を調整
query.speedScale = speed;
// 音声合成
const synthesisResponse = await fetch(
`${this.baseUrl}/synthesis?speaker=${voiceId}`,
{
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify(query),
},
);
if (!synthesisResponse.ok) {
throw new Error(
`Failed to synthesize audio: ${synthesisResponse.statusText}`,
);
}
const arrayBuffer = await synthesisResponse.arrayBuffer();
return Buffer.from(arrayBuffer);
}
}
