set wav sample rate and PCM for h5 (#919)

zhaomingwork

2023-09-04 5d15727b1e545a17793a5776bbe5c35b87654398

 funasr/runtime/html5/static/main.js

@@ -45,6 +45,7 @@


var isfilemode=false;  // if it is in file mode

var file_ext="";

var file_sample_rate=16000; //for wav file sample rate

var file_data_array;  // array to save file data

 

var totalsend=0;

@@ -70,6 +71,7 @@
      }

   

}



upfile.onclick=function()

{

      btnStart.disabled = true;

@@ -77,25 +79,108 @@
      btnConnect.disabled=false;

   

}



// from https://github.com/xiangyuecn/Recorder/tree/master

var readWavInfo=function(bytes){

   //读取wav文件头，统一成44字节的头

   if(bytes.byteLength<44){

      return null;

   };

   var wavView=bytes;

   var eq=function(p,s){

      for(var i=0;i<s.length;i++){

         if(wavView[p+i]!=s.charCodeAt(i)){

            return false;

         };

      };

      return true;

   };

	
   if(eq(0,"RIFF")&&eq(8,"WAVEfmt ")){

 
      var numCh=wavView[22];

      if(wavView[20]==1 && (numCh==1||numCh==2)){//raw pcm 单或双声道

         var sampleRate=wavView[24]+(wavView[25]<<8)+(wavView[26]<<16)+(wavView[27]<<24);

         var bitRate=wavView[34]+(wavView[35]<<8);

         var heads=[wavView.subarray(0,12)],headSize=12;//head只保留必要的块

         //搜索data块的位置

         var dataPos=0; // 44 或有更多块

         for(var i=12,iL=wavView.length-8;i<iL;){

            if(wavView[i]==100&&wavView[i+1]==97&&wavView[i+2]==116&&wavView[i+3]==97){//eq(i,"data")

               heads.push(wavView.subarray(i,i+8));

               headSize+=8;

               dataPos=i+8;break;

            }

            var i0=i;

            i+=4;

            i+=4+wavView[i]+(wavView[i+1]<<8)+(wavView[i+2]<<16)+(wavView[i+3]<<24);

            if(i0==12){//fmt 
               heads.push(wavView.subarray(i0,i));

               headSize+=i-i0;

            }

         }

         if(dataPos){

            var wavHead=new Uint8Array(headSize);

            for(var i=0,n=0;i<heads.length;i++){

               wavHead.set(heads[i],n);n+=heads[i].length;

            }

            return {

               sampleRate:sampleRate

               ,bitRate:bitRate

               ,numChannels:numCh

               ,wavHead44:wavHead

               ,dataPos:dataPos

            };

         };

      };

   };

   return null;

};



upfile.onchange = function () {

　　　　　　var len = this.files.length;  

            for(let i = 0; i < len; i++) {



                let fileAudio = new FileReader();

                fileAudio.readAsArrayBuffer(this.files[i]);  

 
            file_ext=this.files[i].name.split('.').pop().toLowerCase();



                var audioblob;

                fileAudio.onload = function() {

                 var audioblob= fileAudio.result;

                audioblob = fileAudio.result;

 
				 
             file_data_array=audioblob;

             console.log(audioblob);

 
                  

                 info_div.innerHTML='请点击连接进行识别';

               
 
                }



　　　　　　　　　　fileAudio.onerror = function(e) {

　　　　　　　　　　　　console.log('error' + e);

　　　　　　　　　　}

            }

         // for wav file, we  get the sample rate

         if(file_ext=="wav")

            for(let i = 0; i < len; i++) {



                let fileAudio = new FileReader();

                fileAudio.readAsArrayBuffer(this.files[i]);  
                fileAudio.onload = function() {

                audioblob = new Uint8Array(fileAudio.result);

 
            // for wav file, we can get the sample rate

            var info=readWavInfo(audioblob);

               console.log(info);

               file_sample_rate=info.sampleRate;

	 
 
                }



　　　　　　 
            }

 
        }



function play_file()