Question

我目前正在尝试将16位样本转换为32位浮点。但是，我遇到了一个问题，即我的32位浮点文件的音频时间减少了一半。（例如，我的输入是一个4秒16位PCM WAV，我的输出变成了两秒钟的IEEE浮点WAV。）这是代码。

using (WaveFileReader reader = new WaveFileReader(file.wav))
{
    IWaveProvider stream32 = new Wave16ToFloatProvider(reader);

    using (WaveFileWriter converted = new WaveFileWriter(temp.wav))
    {
        // Buffer length needs to be a power of 2 for FFT to work nicely.
        // However, make the buffer too long and pitches aren't detected fast enough.
        // Successful buffer sizes: 8192, 4096, 2048, 1024 (some
        // pitch detection algorithms need at least 2048).
        byte[] buffer = new byte[8192];
        int bytesRead;
        do
        {
            bytesRead = stream32.Read(buffer, 0, buffer.Length);
            converted.Write(buffer, 0, bytesRead);
        } while (bytesRead != 0 && converted.Length < reader.Length);
    }
}

Answer 1

退出条件：

} while (bytesRead != 0 && converted.Length < reader.Length);

看起来很可疑;它听起来就像你扩展数据一样，所以我们应该期望converted.Length 更多而不是reader.Length结束 - 所以我的猜测是这个退出条件导致它过早退出。

将16位转换为32位浮点

1 个答案: