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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| /********************** public functions *********************/ | ||
| function playSound(id) | ||
| { | ||
| var snd=getObject(4,id); | ||
| var f=new GFile(snd); | ||
| var sound=undefined; | ||
| switch (snd.charCodeAt(7)) | ||
| { | ||
| case 0: //straight 8 | ||
| sound=doSampled(f); | ||
| break; | ||
| case 1: //MIDI | ||
| break; | ||
| case 2: //compressed 4 | ||
| sound=doCompressed(f); | ||
| break; | ||
| } | ||
| if (sound==undefined) return 0; | ||
| if (soundSupport && !muted) | ||
| sound.play(); | ||
| return sound.time(); | ||
| } | ||
|
|
||
| /********************** private functions *********************/ | ||
|
|
||
| function doSampled(f) | ||
| { | ||
| var soundlen=0; | ||
| var numParts=f.r16(); | ||
| for (var part=0;part<numParts;part++) | ||
| { | ||
| f.r16(); //sampleDataOffset | ||
| soundlen+=f.r16(); //sampleLen | ||
| f.r16(); //type | ||
| f.r16(); | ||
| } | ||
| f.seek(8,f.set); | ||
| var freq=f.r16(); | ||
| var sound=new Sound(soundlen,freq); | ||
| var pos=0; | ||
| var ch; | ||
| for (var part=0;part<numParts;part++) | ||
| { | ||
| f.seek(2+part*8,f.set); | ||
| var ofs=f.r16(); | ||
| var len=f.r16(); | ||
| f.seek(ofs,f.set); | ||
| for (var i=0;i<len;i++) | ||
| sound.data[pos++]=f.r8(); | ||
| } | ||
| return sound; | ||
| } | ||
| var wavtable=[0x7f,0x7e,0x7c,0x78,0x70,0x60,0x40,0x01, | ||
| 0x80,0x81,0x83,0x87,0x8f,0x9f,0xbf,0xff]; | ||
| function doCompressed(f) | ||
| { | ||
| var soundlen=0; | ||
| var numParts=f.r16(); | ||
| for (var part=0;part<numParts;part++) | ||
| { | ||
| f.r16(); //sampleDataOffset | ||
| soundlen+=f.r16()*2; //sampleLength | ||
| f.r16(); //type | ||
| f.r16(); //freq | ||
| } | ||
| f.seek(8,f.set); | ||
| var freq=f.r16(); | ||
| var sound=new Sound(soundlen,freq); | ||
| var pos=0; | ||
| for (var part=0;part<numParts;part++) | ||
| { | ||
| f.seek(2+part*8,f.set); | ||
| var ofs=f.r16(); | ||
| var len=f.r16()*2; | ||
| f.seek(ofs,f.set); | ||
| var ch; | ||
| for (var i=0;i<len;i++) | ||
| { | ||
| if (i&1) ch>>=4; | ||
| else ch=f.r8(); | ||
| sound.data[pos++]=wavtable[ch&0xf]; | ||
| } | ||
| } | ||
| return sound; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| /********************** public functions *********************/ | ||
|
|
||
|
|
||
| /********************** private functions *********************/ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| /********************** public functions *********************/ | ||
| var soundSupport=false; | ||
| var muted=false; | ||
|
|
||
| try { | ||
| var type=document.createElement('audio').canPlayType('audio/wav'); | ||
| soundSupport=type!='' && type!='no'; | ||
| } catch (e) {} | ||
|
|
||
| /** | ||
| * @constructor | ||
| */ | ||
| function Sound(len,freq) | ||
| { | ||
| this.data=new Array(len); | ||
| this.len=len; | ||
| this.freq=freq; | ||
| } | ||
| Sound.prototype.time=function() | ||
| { | ||
| return this.len/this.freq; | ||
| } | ||
| Sound.prototype.play=function() | ||
| { | ||
| var audio=$(document.createElement('audio')); | ||
| $(document.body).append(audio); | ||
| audio.attr("src","data:audio/x-wav;base64,"+towav(this)); | ||
| var vol=getSetting('volume'); | ||
| if (vol==null) vol=50; | ||
| audio.attr('volume',vol/100); | ||
| audio.bind('ended',function(){ | ||
| audio.remove(); | ||
| }); | ||
| audio.get(0).play(); | ||
| } | ||
|
|
||
| /********************** private functions *********************/ | ||
|
|
||
| function encode64(input) | ||
| { | ||
| var key="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"+ | ||
| "0123456789+/="; | ||
| var output=''; | ||
| var chr1,chr2,chr3; | ||
| var enc1,enc2,enc3,enc4; | ||
| var i=0; | ||
| do { | ||
| chr1=input[i++]; | ||
| chr2=input[i++]; | ||
| chr3=input[i++]; | ||
| enc1=chr1>>2; | ||
| enc2=(chr1&3)<<4; | ||
| if (chr2==undefined) | ||
| enc3=enc4=64; | ||
| else if (chr3==undefined) | ||
| { | ||
| enc2|=chr2>>4; | ||
| enc3=(chr2&15)<<2; | ||
| enc4=64; | ||
| } | ||
| else | ||
| { | ||
| enc2|=chr2>>4; | ||
| enc3=((chr2&15)<<2)|(chr3>>6); | ||
| enc4=chr3&63; | ||
| } | ||
| output+=key.charAt(enc1)+ | ||
| key.charAt(enc2)+ | ||
| key.charAt(enc3)+ | ||
| key.charAt(enc4); | ||
| } while (i<input.length); | ||
| return output; | ||
| } | ||
| function towav(snd) | ||
| { | ||
| var wav=new Array(44+snd.len); | ||
| wav[0]=82; wav[1]=73; wav[2]=70; wav[3]=70; //RIFF | ||
| var sublen=36+snd.len; | ||
| wav[4]=sublen&0xff; wav[5]=(sublen>>8)&0xff; | ||
| wav[6]=(sublen>>16)&0xff; wav[7]=(sublen>>24)&0xff; | ||
| wav[8]=87; wav[9]=65; wav[10]=86; wav[11]=69; //WAVE | ||
| wav[12]=102; wav[13]=109; wav[14]=116; wav[15]=32; //fmt | ||
| wav[16]=0x10; wav[17]=0; wav[18]=0; wav[19]=0; //chunksize | ||
| wav[20]=1; wav[21]=0; //pcm | ||
| wav[22]=1; wav[23]=0; //mono | ||
| wav[24]=snd.freq&0xff; wav[25]=(snd.freq>>8)&0xff; | ||
| wav[26]=(snd.freq>>16)&0xff; wav[27]=(snd.freq>>24)&0xff; | ||
| wav[28]=wav[24]; wav[29]=wav[25]; | ||
| wav[30]=wav[26]; wav[31]=wav[27]; //byte rate | ||
| wav[32]=1; wav[33]=0; //block align | ||
| wav[34]=8; wav[35]=0; //bits per sample | ||
| wav[36]=100; wav[37]=97; wav[38]=116; wav[39]=97; //data | ||
| wav[40]=snd.len&0xff; wav[41]=(snd.len>>8)&0xff; | ||
| wav[42]=(snd.len>>16)&0xff; wav[43]=(snd.len>>24)&0xff; | ||
| for (var i=0;i<snd.len;i++) | ||
| wav[44+i]=snd.data[i]; | ||
| return encode64(wav); | ||
| } |