diff options
Diffstat (limited to 'blog/post/2016-04-09.html')
| -rw-r--r-- | blog/post/2016-04-09.html | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/blog/post/2016-04-09.html b/blog/post/2016-04-09.html new file mode 100644 index 0000000..56d4aea --- /dev/null +++ b/blog/post/2016-04-09.html @@ -0,0 +1,186 @@ +<html><head> +<meta charset="utf-8"> +<meta name="viewport" content="width=device-width,initial-scale=1"> +<meta name="theme-color" content="#000000"> +<title>Chrisoft::Blog</title> +<script type="text/javascript" src="/panel.js"></script> +<script type="text/javascript" src="/blog/footnoter.js"></script> +<script type="text/javascript" src="/blog/aes-js.js"></script> +<script type="text/javascript" src="/blog/scrypt.js"></script> +<script type="text/javascript" src="/blog/sha256.js"></script> +<script type="text/javascript" src="/blog/decryptor.js"></script> +<link rel="stylesheet" type="text/css" href="/common.css"> +<link rel="stylesheet" type="text/css" href="/panel.css"> +<link rel="stylesheet" type="text/css" href="/theme0a.css" id="theme0a"> +<link rel="stylesheet" type="text/css" href="/theme0b.css" id="theme0b"> +<link rel="stylesheet" type="text/css" href="/theme1a.css" id="theme1a"> +<link rel="stylesheet" type="text/css" href="/theme1b.css" id="theme1b"> +<link rel="stylesheet" type="text/css" href="/theme2a.css" id="theme2a"> +<link rel="stylesheet" type="text/css" href="/theme2b.css" id="theme2b"> +<link rel="stylesheet" type="text/css" href="/theme3a.css" id="theme3a"> +<link rel="stylesheet" type="text/css" href="/theme3b.css" id="theme3b"> +<link rel="stylesheet" type="text/css" href="/blog/blogext.css"> +<script> +function ol() +{ + window.onresize=function() + { + if(window.innerWidth<768) + setupevents(); + else unsetevents(); + } + window.onresize(); + _decryptonload(); +} +function loadTheme(){ + var thm=document.cookie.replace(new RegExp("(?:(?:^|.*;\\s*)thm\\s*\\=\\s*([^;]*).*$)|^.*$"),"$1"); + if(thm.length<2||'0123z'.indexOf(thm[0])==-1||'abz'.indexOf(thm[1])==-1)thm='zz'; + var ent=""; + var d=new Date(); + if(thm[0]=='z') + { + var m=d.getMonth()+1; + if(m>=3&&m<6)thm='0'+thm[1]; + else if(m>=6&&m<9)thm='1'+thm[1]; + else if(m>=9&&m<12)thm='2'+thm[1]; + else thm='3'+thm[1]; + } + if(thm[1]=='z') + {if(d.getHours()>=18||d.getHours()<6)thm=thm[0]+'b';else thm=thm[0]+'a';} + ent=`theme${thm}`; + var R=new RegExp('theme[0-4][ab]'); + for(var i=0;i<document.styleSheets.length;++i) + { + if(R.exec(document.styleSheets[i].ownerNode.id)!==null&&document.styleSheets[i].ownerNode.id!=ent) + document.styleSheets[i].disabled=true; + else document.styleSheets[i].disabled=false; + } + var thmcolor=""; + switch(thm[0]) + { + case '0':thmcolor=thm[1]=='a'?'#f59dda':'#2f0933';break; + case '1':thmcolor=thm[1]=='a'?'#9df59d':'#090933';break; + case '2':thmcolor=thm[1]=='a'?'#edb47b':'#1f1205';break; + case '3':thmcolor=thm[1]=='a'?'#a0cdfa':'#051933';break; + } + document.querySelector("meta[name=theme-color]").setAttribute('content',thmcolor); +} +loadTheme(); +</script> +</head> +<body onload="ol()" style="overflow-x:hidden;"> + <div id="panel" class="TText"> + <ul id="panellist"> + <li><a href="/"><h1>Chrisoft</h1></a></li> + <li><a href="/blog"><h2>Blog</h2></a></li> + <li><a href="#"><h3 id="title">The MIDI File Format Specification and MIDI Implementation in QMidiPlayer</h3></a></li> + <li><span>Tags</span> + <ul id="tagslist"> + <li><a href="/blog/list/devel/">devel</a></li><li><a href="/blog/list/qmidiplayer/">qmidiplayer</a></li><li><a href="/blog/list/midi/">midi</a></li></ul> + </li> + <li id="tocouter"> + <span>Table of Contents</span> + <ul id="tocroot"> + <li><a class="toctarg" href="#tocanch0">Abstract</a></li><li><a class="toctarg" href="#tocanch1"></a></li></ul> + </li> + <li style="margin-left:-0.5em"><a id="prevp" href="2016-03-26.html">Prev post</a></li> + <li style="margin-left:-0.5em"><a id="nextp" href="2016-05-12.html">Next post</a></li> + </ul> + </div> + <div id="content"> + <h2 id="titleh" class="TText" style="font-wight:normal;">The MIDI File Format Specification and MIDI Implementation in QMidiPlayer</h2> + <div id="datetags" class="TText" style="margin-bottom:1em;">2016-04-09<br>#devel #qmidiplayer #midi</div> + <hr><div id="article" class="TText"> +<article> +<style> +article h2,article h3{border-bottom:1px solid #c0c0c0;overflow:hidden;} +</style> + +<h2 id="tocanch0" class="tvis">Abstract</h2> +<p> +This article is intended to be a reliable MIDI file format and implementation reference. +It takes QMidiPlayer as an example to illustrate how a basic software-based MIDI implementation works. +For the Chinese version, please visit <Chinese version link here>. +</p> + +<div style="padding:7px;border:1px solid #aaa;display:table;"> +<div style="text-align:center;"> +<b>Contents</b> [<a href="#" onclick="var e=document.getElementById("toc");if(e.style.display=="block"){e.style.display="none";this.innerHTML="show";}else {e.style.display="block";this.innerHTML="hide";}">hide</a>] +</div> +<style scoped=""> +ul{list-style-type:none;} +</style> +<ul style="font-size:0.9em;display:block;" id="toc"> + <li>1 Data Representations + <ul> + <li>1.1 Binary values</li> + <li>1.2 Variable length values</li> + </ul> + </li> + <li>2 Chunks + <ul> + <li>2.1 Header chunk</li> + <li>2.2 Track chunks</li> + </ul> + </li> + <li>3 Events + <ul> + <li>3.1 MIDI events + <ul> + <li>3.1.1 Running status</li> + </ul> + </li> + <li>3.2 Meta events</li> + <li>3.3 SysEx events</li> + </ul> + </li> + <li>4 Common MIDI Implementations + <ul> + <li>4.1 Pre-GM</li> + <li>4.2 GM</li> + <li>4.3 GS</li> + <li>4.4 XG</li> + <li>4.5 GM2</li> + </ul> + </li> + <li>5 Implementation details in QMidiPlayer</li> + <li>6 Appendix + <ul> + <li>6.1 List of known SysEx's</li> + <li>6.2 Instrument list</li> + <li>6.3 MIDI Effects</li> + </ul> + </li> + <li>7 References</li> +</ul> +</div> + +<h2 id="tocanch1" class="tvis"></h2> +<article> +</article></article></div><br><hr> + <div class="TText" id="notediv" style="font-size:80%;"></div> + <div id="insanch" style="height:3em;"></div> + <div id="footer" style=""> + <div id="pagesw" class="TText" style="width:100%;height:0.5em;"></div> + <div style="text-align:center;" class="TText"> + Proudly powered by SSBS <reduced style="font-size:70%;">(the static stupid blogging system)</reduced> 2.5 + <br> + Content licensed under CC BY-SA 4.0. <span id="purgep" style="display:none;font-size:70%;">This page has passphrase(s) stored. Click <a href="javascript:_purgep()">here</a> to purge.</span> + </div> + </div> + <div id="cmdbuf" class="TText" style="transition:500ms;padding:1em;font-size:2em;color:white;position:absolute;background-color:rgba(0,0,0,0.6);left:50%;top:50%;transform:translate(-50%,-50%);pointer-events:none;opacity:0;"> + </div> + </div> + <div id="decryptui" style="display:none;opacity:0;color:white;z-index:1000;position:fixed;left:0;top:0;width:100%;height:100%;background-color:rgba(0,0,0,0.4);transition:opacity 0.5s;"> + <div id="decryptdlg" class="TText" style="padding:10px 20px;position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background-color:rgba(0,0,0,0.6);"> + <div id="keyhint" style="margin-bottom:8px;"></div> + <div style="margin-bottom:8px;">Key: <input id="keyinp" type="text" style="color:#fff;"></div> + <div style="height:2.25em;"> + <button id="btndecrypt" onclick="decryptor(decid,document.getElementById('keyinp').value);" style="position:absolute;left:20px;">Decrypt</button> + <button onclick="hidedecryptui();" style="position:absolute;right:20px;">Cancel</button> + </div> + + </div> + + +</div></body></html>
\ No newline at end of file |