2.4.5 creator 支持播放base64的音效吗

[1150231541 (看不到)]

如题，之前用的1.9.3的自定义引擎，支持了播放base64音效，最近项目升级到2.4.5，发现 audioEngine 要使用AudioClip 去播放音效，请问可以支持base64 吗

[1150231541 (看不到)]

已解决，根据之前项目，在2.4.5的基础上简单修改了下引擎

1. CCAudioClip.js 增加base64 音效加载

    var LoadMode = cc.Enum({
        WEB_AUDIO: 0,
        DOM_AUDIO: 1,
        BASE64_AUDIO : 2,
    });
   
    setBase64Audio (base64) {
        this.loadMode = LoadMode.BASE64_AUDIO;
        this._nativeUrl = base64 || "";
    },
   
    _ensureLoaded (onComplete) {
        if (this.loaded) {
            return onComplete && onComplete();
        }
        else {
            if (onComplete) {
                this.once('load', onComplete);
            }
            if (!this._loading) {
                this._loading = true;
                let self = this;
                if (this.loadMode == LoadMode.BASE64_AUDIO) {
                    cc.assetManager.loadAny({
                        url : this._nativeUrl,
                    }, (err, audio) =>{
                        self._loading = false;
                        if (err) {
                            cc.error('load Base64Audio error : ' + err);
                            return;
                        }
                        self._nativeAsset = audio;
                    })
                } else {
                    cc.assetManager.postLoadNative(this, function (err) {
                        self._loading = false;
                    });
                }
   
            }
        }
    },
   

2. urlTransformer.js 增加base64 url ext 的解析
   parse 方法

    case RequestType.URL: 
        out.url = item.url;
        out.uuid = item.uuid || item.url;
        out.ext = item.ext || cc.path.extname(item.url);
        out.isNative = item.__isNative__ !== undefined ? item.__isNative__ : true;
        try {
            // add base64 ext
            let url = item.url;
            if (/^data:[^;]+;base64,/.test(url) && out.ext == "") {
                let ext = /^data:audio\/([^;,]+);/i.exec(url);
   
                if (ext) {
                    ext = ext[1].toLowerCase();
                }
                out.ext = "." + ext;
            }
        }
        catch(error){
            console.error (error.message);
        }
        break;
   

3. downloader.js 增加base64的 加载

    var context = __audioSupport.context;
   
    var DecNode = function () {
    }
   
    var decode_stream = function (decnode, url, onComplete) {
   
        try {
            
            context["decodeAudioData"] (decnode.buf,
            function(buffer){
                //success
   
                if (onComplete) {
                    onComplete(null, buffer);
                }
            },
            function () { // only on error attempt to sync on frame boundary
                // retry 
                if (cc.sys.os == cc.sys.OS_IOS || cc.sys.os == cc.sys.OS_OSX) {
                    // retry 
                    if (syncStream (decnode))  {
                        decode_stream (decnode,item,callback);
                    }
   
                    return ;
                }
   
                // none-IOS platform 
                if (callback && item) {
                    //error
                    callback('decode error - ' + item.id, null);
                }
   
            });
            
        } catch (e) {
   
        }
   
    }
   
    var loadBase64Audio = function (url, options, onComplete){
        try{
            var data = atob(url.split(',')[1]);
            var dataView = new Uint8Array(data.length);
            for (var i=0; i<data.length; ++i) {
                dataView[i] = data.charCodeAt(i);
            }
   
            let decnode     = new DecNode ();
            decnode.buf     = dataView.buffer;
            decnode.sync    = 0;
            decnode.retry   = 0;
   
            decode_stream (decnode, url, onComplete);         
        }
        catch(err){
            console.error (err.message);
        }
    }
   
    var downloadAudio = function (url, options, onComplete) {
        // add loadBase64Audio 
        if (/^data:[^;]+;base64,/.test(url)) {
            loadBase64Audio(url, options, onComplete);
        } else {
            // web audio need to download file as arrayBuffer
            if (options.audioLoadMode !== cc.AudioClip.LoadMode.DOM_AUDIO) {
                downloadArrayBuffer(url, options, onComplete);
            }
            else {
                downloadDomAudio(url, options, onComplete);
            }
        }
    }