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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| /****************** | ||
| 《【Demo库】【格式转换】-amr格式转成其他格式》 | ||
| 作者：高坚果 | ||
| 时间：2020-6-24 22:54:41 | ||
| 文档： | ||
| Recorder.AMR2Other(newSet,amrBlob,True,False) | ||
| newSet：Recorder的set参数，用来生成新格式，注意：要先加载好新格式的编码引擎 | ||
| amrBlob：amr二进制数据，注意只支持AMR-NB编码（8000hz） | ||
| True: fn(blob,duration,mockRec) 和Recorder的stop函数参数一致，mockRec为转码时用到的Recorder对象引用 | ||
| False: fn(errMsg) 和Recorder的stop函数参数一致 | ||
| ******************/ | ||
|
|
||
| //=====amr转其他格式核心函数========== | ||
| Recorder.AMR2Other=function(newSet,amrBlob,True,False){ | ||
| var reader=new FileReader(); | ||
| reader.onload=function(){ | ||
| var amr=new Uint8Array(reader.result); | ||
| Recorder.AMR.decode(amr,function(pcm){ | ||
| var rec=Recorder(newSet).mock(pcm,8000); | ||
| rec.stop(function(blob,duration){ | ||
| True(blob,duration,rec); | ||
| },False); | ||
| },False); | ||
| }; | ||
| reader.readAsArrayBuffer(amrBlob); | ||
| }; | ||
| //=====END========================= | ||
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| //转换测试 | ||
| var test=function(amrBlob){ | ||
| if(!amrBlob){ | ||
| Runtime.Log("无数据源，请先录音",1); | ||
| return; | ||
| }; | ||
| var set={ | ||
| type:"mp3" | ||
| ,sampleRate:16000 | ||
| ,bitRate:16 | ||
| }; | ||
|
|
||
| //数据格式一 Blob | ||
| Recorder.AMR2Other(set,amrBlob,function(blob,duration,rec){ | ||
| console.log(blob,(window.URL||webkitURL).createObjectURL(blob)); | ||
| Runtime.Log("amr src blob 转换成 mp3...",2); | ||
| Runtime.LogAudio(blob,duration,rec); | ||
| },function(msg){ | ||
| Runtime.Log(msg,1); | ||
| }); | ||
|
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||
| //数据格式二 Base64 模拟 | ||
| var reader=new FileReader(); | ||
| reader.onloadend=function(){ | ||
| var base64=(/.+;\s*base64\s*,\s*(.+)$/i.exec(reader.result)||[])[1]; | ||
|
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||
| //数据格式二核心代码，以上代码无关紧要 | ||
| var bstr=atob(base64),n=bstr.length,u8arr=new Uint8Array(n); | ||
| while(n--){ | ||
| u8arr[n]=bstr.charCodeAt(n); | ||
| }; | ||
|
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| Recorder.AMR2Other(set,new Blob([u8arr.buffer]),function(blob,duration,rec){ | ||
| Runtime.Log("amr as base64 转换成 mp3...",2); | ||
| Runtime.LogAudio(blob,duration,rec); | ||
| },function(msg){ | ||
| Runtime.Log(msg,1); | ||
| }); | ||
| }; | ||
| reader.readAsDataURL(amrBlob); | ||
| }; | ||
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| //=====以下代码无关紧要，音频数据源，采集原始音频用的================== | ||
| //加载录音框架 | ||
| Runtime.Import([ | ||
| {url:RootFolder+"/src/recorder-core.js",check:function(){return !window.Recorder}} | ||
| ,{url:"https://cdn.jsdelivr.net/gh/xiangyuecn/Recorder@latest/dist/engine/mp3.js",check:function(){return !Recorder.prototype.mp3}} | ||
| ,{url:"https://cdn.jsdelivr.net/gh/xiangyuecn/Recorder@latest/dist/engine/beta-amr.js",check:function(){return !Recorder.prototype.amr}} | ||
| ]); | ||
|
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||
| //显示控制按钮 | ||
| Runtime.Ctrls([ | ||
| {name:"开始amr录音",click:"recStart"} | ||
| ,{name:"结束录音并转换",click:"recStop"} | ||
|
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||
| ,{choiceFile:{ | ||
| multiple:false | ||
| ,name:"amr" | ||
| ,mime:"audio/amr" | ||
| ,process:function(fileName,arrayBuffer,filesCount,fileIdx,endCall){ | ||
| test(new Blob([arrayBuffer])); | ||
| endCall(); | ||
| } | ||
| }} | ||
| ]); | ||
|
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| //调用录音 | ||
| var rec; | ||
| function recStart(){ | ||
| rec=Recorder({ | ||
| type:"amr" | ||
| ,onProcess:function(buffers,powerLevel,bufferDuration,bufferSampleRate){ | ||
| Runtime.Process.apply(null,arguments); | ||
| } | ||
| }); | ||
| var t=setTimeout(function(){ | ||
| Runtime.Log("无法录音：权限请求被忽略（超时假装手动点击了确认对话框）",1); | ||
| },8000); | ||
|
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||
| rec.open(function(){//打开麦克风授权获得相关资源 | ||
| clearTimeout(t); | ||
| rec.start();//开始录音 | ||
| },function(msg,isUserNotAllow){//用户拒绝未授权或不支持 | ||
| clearTimeout(t); | ||
| Runtime.Log((isUserNotAllow?"UserNotAllow，":"")+"无法录音:"+msg, 1); | ||
| }); | ||
| }; | ||
| function recStop(){ | ||
| rec.stop(function(blob,duration){ | ||
| rec.close();//释放录音资源 | ||
|
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| Runtime.LogAudio(blob,duration,rec); | ||
|
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| test(blob); | ||
| },function(msg){ | ||
| Runtime.Log("录音失败:"+msg, 1); | ||
| }); | ||
| }; |
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