military-tech-voice3.0/backend/app/services/minimax_service.py

import os
import base64
import requests
from io import BytesIO

def synthesize_minimax(text, speed=1.0, pitch=0, volume=1.0, emotion='neutral'):
    """调用MiniMax TTS API"""
    api_key = os.getenv('MINIMAX_API_KEY', '')
    if not api_key:
        raise ValueError('MINIMAX_API_KEY未设置')
    
    # 将音量映射到0-100
    volume_int = int(volume * 100)
    
    url = 'https://api.minimax.chat/v1/t2a_v2'
    headers = {
        'Authorization': f'Bearer {api_key}',
        'Content-Type': 'application/json'
    }
    
    payload = {
        'model': 'speech-2.8-hd',
        'text': text,
        'stream': False,
        'voice_setting': {
            'voice_id': 'lanhao_military_v2',
            'speed': speed,
            'vol': volume_int,
            'pitch': pitch,
            'emotion': emotion,
        },
        'audio_setting': {
            'audio_sample_rate': 32000,
            'bitrate': 128000,
            'format': 'mp3'
        }
    }
    
    response = requests.post(url, json=payload, headers=headers, timeout=60)
    
    if response.status_code == 402:
        raise Exception('MiniMax 余额不足，请联系管理员充值')
    if response.status_code == 401 or response.status_code == 403:
        raise Exception('MiniMax API密钥无效，请联系管理员')
    if response.status_code == 429:
        raise Exception('MiniMax 请求过于频繁，请稍后再试')
    if response.status_code != 200:
        raise Exception(f'MiniMax 服务异常({response.status_code})，请稍后再试')
    
    result = response.json()
    
    if 'data' in result and 'audio' in result['data']:
        audio_hex = result['data']['audio']
        audio_bytes = bytes.fromhex(audio_hex)
        return audio_bytes
    
    raise Exception(f'MiniMax返回格式异常: {result}')