音频优化之代码

这是我在项目里用的音频格式化代码：

public class SoundImportEditor : AssetPostprocessor
{
    public override uint GetVersion()
    {
        return 1;
    }

    const string SYMBOL_ANDROID = "Android";
    const string SYMBOL_IPHONE = "iPhone";
    const string DIR_SOUND = "Assets/Sound/";


    //背景音乐：Compress In Memory + Vorbis/MP3
    //经常播放的短音效：Decompress On Load + PCM
    //一般的音效：Compressed In Memory + ADPCM

    List<string> bgSound = new List<string>()
    {
        "BgBattle",
        "BgMainUi"
    };

    List<string> btnSound = new List<string>()
    {
        "battle_open_btn",
        "normal_choose",
        "normal_click",
        "normal_close",
        "normal_layout",
        "normal_menu"
    };

    bool NameInList(List<string> list, string name)
    {
        foreach (var item in list)
        {
            if (name.Contains(item))
                return true;
        }
        return false;
    }

    private void OnPostprocessAudio(AudioClip clip)
    {
        AudioImporter importer = assetImporter as AudioImporter;
        string versionStr = this.GetVersion().ToString();
        if (importer.userData == versionStr)
            return;
        string assetPath = importer.assetPath;
        if (!assetPath.Contains(DIR_SOUND))
            return;

        Debug.LogFormat("自动帮您导入音频 纠正格式 : {0}", assetPath);

        //ambisonic VR有用
        importer.ambisonic = false;
        importer.preloadAudioData = false;
        //channels 声道数
        importer.forceToMono = clip.channels <= 1;
        importer.userData = versionStr;

        AudioImporterSampleSettings setting = importer.defaultSampleSettings;
        setting.sampleRateSetting = AudioSampleRateSetting.OverrideSampleRate;
        setting.sampleRateOverride = 22050;

        if (NameInList(bgSound, assetPath))
        {
            importer.loadInBackground = true;

            setting.loadType = AudioClipLoadType.Streaming;
            setting.compressionFormat = AudioCompressionFormat.Vorbis;
            setting.quality = 0.5f;
        }
        else if (NameInList(btnSound, assetPath))
        {
            importer.loadInBackground = false;

            setting.loadType = AudioClipLoadType.DecompressOnLoad;
            setting.compressionFormat = AudioCompressionFormat.PCM;
        }
        else
        {
            importer.loadInBackground = false;

            setting.loadType = AudioClipLoadType.CompressedInMemory;
            setting.compressionFormat = AudioCompressionFormat.ADPCM;
        }

        importer.SetOverrideSampleSettings(SYMBOL_ANDROID, setting);
        importer.SetOverrideSampleSettings(SYMBOL_IPHONE, setting);

        importer.SaveAndReimport();
        EditorUtility.SetDirty(importer);
    }
}