import os
import torchaudio
from pathlib import Path
from tqdm import tqdm

def resample_wav_to_16k(input_dir, output_dir):
    input_dir = Path(input_dir)
    output_dir = Path(output_dir)

    wav_paths = list(input_dir.rglob("*.wav"))

    for wav_path in tqdm(wav_paths):
        # 读取音频
        waveform, sr = torchaudio.load(wav_path)

        # 重采样为 16kHz（如果不是）
        if sr != 16000:
            resampler = torchaudio.transforms.Resample(orig_freq=sr, new_freq=16000)
            waveform = resampler(waveform)

        # 构造输出路径（保持相对路径结构）
        relative_path = wav_path.relative_to(input_dir)
        target_path = output_dir / relative_path

        # 创建目标目录
        target_path.parent.mkdir(parents=True, exist_ok=True)

        # 保存为16kHz wav
        torchaudio.save(target_path.as_posix(), waveform, 16000)
        # print(f"Saved: {target_path}")

# 使用示例
resample_wav_to_16k("/apdcephfs_nj7/share_303172353/ggyzhang/projects/v2s/home/xj_data/jishengpeng/WavReward/jsp_code/realdialogue_audio",
    "/apdcephfs_nj7/share_303172353/ggyzhang/projects/v2s/home/xj_data/jishengpeng/WavReward/jsp_code/realdialogue_audio16k")