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bug: format identity issue for mp3

SharpMusic/src/SharpMusic.DllHellP/Extensions/FFmpegExtensions.cs

Lines 20 to 32 in d513762

public static SampleFormat ToSampleFormat(this AVCodecParameters parameters)
{
return (parameters.bits_per_raw_sample is not 0
? parameters.bits_per_raw_sample
: parameters.bits_per_coded_sample) switch
{
0 => SampleFormat.None,
8 when parameters.format is 0 => SampleFormat.Unsigned8,
16 when parameters.format > 0 => SampleFormat.Signed16,
32 when parameters.format > 0 => SampleFormat.Signed32,
_ => throw new ArgumentOutOfRangeException(nameof(parameters), parameters, null)
};
}

这里播放mp3的时候遇到了bits_per_raw_sample和bits_per_coded_sample都为零，而format值为8的情况
扩展方法没有正确处理这种情况直接返回了SampleFormat.None

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