apps/monibuca
1
0
Fork 0
mirror of https://github.com/langhuihui/monibuca.git synced 2025-12-24 13:48:04 +08:00
Code Issues Packages Projects Releases Wiki Activity
Files
b9e19e75c84eb139ebd45a39dcbee2f917ef1aba
monibuca/dashboard/dist/docs/develop.html
langhuihui 543d735c41 完善文档
2020-01-30 21:31:09 +08:00

190 lines
32 KiB
HTML
Raw Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>插件开发 | Monibuca</title>
<meta name="description" content="">
<link rel="preload" href="/docs/assets/css/styles.d51c815b.css" as="style"><link rel="preload" href="/docs/assets/js/app.d51c815b.js" as="script"><link rel="preload" href="/docs/assets/js/2.190ec46a.js" as="script"><link rel="prefetch" href="/docs/assets/js/1.6babbc1d.js"><link rel="prefetch" href="/docs/assets/js/3.7646e76c.js"><link rel="prefetch" href="/docs/assets/js/4.08fbc0d9.js">
<link rel="stylesheet" href="/docs/assets/css/styles.d51c815b.css">
</head>
<body>
<div id="app" data-server-rendered="true"><div class="theme-container"><header class="navbar"><div class="sidebar-button"><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" role="img" viewBox="0 0 448 512" class="icon"><path fill="currentColor" d="M436 124H12c-6.627 0-12-5.373-12-12V80c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12z"></path></svg></div><a href="/docs/" class="home-link router-link-active"><!----><span class="site-name">
Monibuca
</span></a><div class="links"><div class="search-box"><input aria-label="Search" autocomplete="off" spellcheck="false" value=""><!----></div><!----></div></header><div class="sidebar-mask"></div><div class="sidebar"><!----><ul class="sidebar-links"><li><a href="/docs/" class="sidebar-link">起步</a></li><li><a href="/docs/develop.html" class="active sidebar-link">插件开发</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/docs/develop.html#插件的定义" class="sidebar-link">插件的定义</a></li><li class="sidebar-sub-header"><a href="/docs/develop.html#插件的安装" class="sidebar-link">插件的安装</a></li><li class="sidebar-sub-header"><a href="/docs/develop.html#开发订阅者插件" class="sidebar-link">开发订阅者插件</a></li><li class="sidebar-sub-header"><a href="/docs/develop.html#开发发布者插件" class="sidebar-link">开发发布者插件</a></li><li class="sidebar-sub-header"><a href="/docs/develop.html#开发钩子插件" class="sidebar-link">开发钩子插件</a></li></ul></li><li><a href="/docs/history.html" class="sidebar-link">更新日志</a></li><li><a href="/docs/plugins.html" class="sidebar-link">内置插件</a></li></ul></div><div class="page"><div class="content"><h1 id="插件开发"><a href="#插件开发" aria-hidden="true" class="header-anchor">#</a> 插件开发</h1><h2 id="插件的定义"><a href="#插件的定义" aria-hidden="true" class="header-anchor">#</a> 插件的定义</h2><p>所谓的插件，没有什么固定的规则，只需要完成<code>安装</code>操作即可。插件可以实现任意的功能扩展，最常见的是实现某种传输协议用来推流或者拉流</p><h2 id="插件的安装"><a href="#插件的安装" aria-hidden="true" class="header-anchor">#</a> 插件的安装</h2><p>下面是内置插件jessica的源码，代表了典型的插件安装</p><div class="language-go extra-class"><pre class="language-go"><code><span class="token keyword">package</span> jessica
<span class="token keyword">import</span> <span class="token punctuation">(</span>
<span class="token punctuation">.</span> <span class="token string">&quot;github.com/langhuihui/monibuca/monica&quot;</span>
<span class="token string">&quot;log&quot;</span>
<span class="token string">&quot;net/http&quot;</span>
<span class="token punctuation">)</span>
<span class="token keyword">var</span> config <span class="token operator">=</span> <span class="token function">new</span><span class="token punctuation">(</span>ListenerConfig<span class="token punctuation">)</span>
<span class="token keyword">func</span> <span class="token function">init</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token function">InstallPlugin</span><span class="token punctuation">(</span><span class="token operator">&amp;</span>PluginConfig<span class="token punctuation">{</span>
Name<span class="token punctuation">:</span> <span class="token string">&quot;Jessica&quot;</span><span class="token punctuation">,</span>
Type<span class="token punctuation">:</span> PLUGIN_SUBSCRIBER<span class="token punctuation">,</span>
Config<span class="token punctuation">:</span> config<span class="token punctuation">,</span>
Run<span class="token punctuation">:</span> run<span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token keyword">func</span> <span class="token function">run</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
log<span class="token punctuation">.</span><span class="token function">Printf</span><span class="token punctuation">(</span><span class="token string">&quot;server Jessica start at %s&quot;</span><span class="token punctuation">,</span> config<span class="token punctuation">.</span>ListenAddr<span class="token punctuation">)</span>
log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>http<span class="token punctuation">.</span><span class="token function">ListenAndServe</span><span class="token punctuation">(</span>config<span class="token punctuation">.</span>ListenAddr<span class="token punctuation">,</span> http<span class="token punctuation">.</span><span class="token function">HandlerFunc</span><span class="token punctuation">(</span>WsHandler<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>
</code></pre></div><p>当主程序读取配置文件完成解析后，会调用各个插件的Run函数，上面代码中执行了一个http的端口监听</p><h2 id="开发订阅者插件"><a href="#开发订阅者插件" aria-hidden="true" class="header-anchor">#</a> 开发订阅者插件</h2><p>所谓订阅者就是用来从流媒体服务器接收音视频流的程序，例如RTMP协议执行play命令后、http-flv请求响应程序、websocket响应程序。内置插件中录制flv程序也是一个特殊的订阅者。
下面是http-flv插件的源码，供参考</p><div class="language-go extra-class"><pre class="language-go"><code><span class="token keyword">package</span> HDL
<span class="token keyword">import</span> <span class="token punctuation">(</span>
<span class="token punctuation">.</span> <span class="token string">&quot;github.com/langhuihui/monibuca/monica&quot;</span>
<span class="token string">&quot;github.com/langhuihui/monibuca/monica/avformat&quot;</span>
<span class="token string">&quot;github.com/langhuihui/monibuca/monica/pool&quot;</span>
<span class="token string">&quot;log&quot;</span>
<span class="token string">&quot;net/http&quot;</span>
<span class="token string">&quot;strings&quot;</span>
<span class="token punctuation">)</span>
<span class="token keyword">var</span> config <span class="token operator">=</span> <span class="token function">new</span><span class="token punctuation">(</span>ListenerConfig<span class="token punctuation">)</span>
<span class="token keyword">func</span> <span class="token function">init</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token function">InstallPlugin</span><span class="token punctuation">(</span><span class="token operator">&amp;</span>PluginConfig<span class="token punctuation">{</span>
Name<span class="token punctuation">:</span> <span class="token string">&quot;HDL&quot;</span><span class="token punctuation">,</span>
Type<span class="token punctuation">:</span> PLUGIN_SUBSCRIBER<span class="token punctuation">,</span>
Config<span class="token punctuation">:</span> config<span class="token punctuation">,</span>
Run<span class="token punctuation">:</span> run<span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token keyword">func</span> <span class="token function">run</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
log<span class="token punctuation">.</span><span class="token function">Printf</span><span class="token punctuation">(</span><span class="token string">&quot;HDL start at %s&quot;</span><span class="token punctuation">,</span> config<span class="token punctuation">.</span>ListenAddr<span class="token punctuation">)</span>
log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>http<span class="token punctuation">.</span><span class="token function">ListenAndServe</span><span class="token punctuation">(</span>config<span class="token punctuation">.</span>ListenAddr<span class="token punctuation">,</span> http<span class="token punctuation">.</span><span class="token function">HandlerFunc</span><span class="token punctuation">(</span>HDLHandler<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token keyword">func</span> <span class="token function">HDLHandler</span><span class="token punctuation">(</span>w http<span class="token punctuation">.</span>ResponseWriter<span class="token punctuation">,</span> r <span class="token operator">*</span>http<span class="token punctuation">.</span>Request<span class="token punctuation">)</span> <span class="token punctuation">{</span>
sign <span class="token operator">:=</span> r<span class="token punctuation">.</span>URL<span class="token punctuation">.</span><span class="token function">Query</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">Get</span><span class="token punctuation">(</span><span class="token string">&quot;sign&quot;</span><span class="token punctuation">)</span>
<span class="token keyword">if</span> err <span class="token operator">:=</span> AuthHooks<span class="token punctuation">.</span><span class="token function">Trigger</span><span class="token punctuation">(</span>sign<span class="token punctuation">)</span><span class="token punctuation">;</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
w<span class="token punctuation">.</span><span class="token function">WriteHeader</span><span class="token punctuation">(</span><span class="token number">403</span><span class="token punctuation">)</span>
<span class="token keyword">return</span>
<span class="token punctuation">}</span>
stringPath <span class="token operator">:=</span> strings<span class="token punctuation">.</span><span class="token function">TrimLeft</span><span class="token punctuation">(</span>r<span class="token punctuation">.</span>RequestURI<span class="token punctuation">,</span> <span class="token string">&quot;/&quot;</span><span class="token punctuation">)</span>
<span class="token keyword">if</span> strings<span class="token punctuation">.</span><span class="token function">HasSuffix</span><span class="token punctuation">(</span>stringPath<span class="token punctuation">,</span> <span class="token string">&quot;.flv&quot;</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
stringPath <span class="token operator">=</span> strings<span class="token punctuation">.</span><span class="token function">TrimRight</span><span class="token punctuation">(</span>stringPath<span class="token punctuation">,</span> <span class="token string">&quot;.flv&quot;</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token keyword">if</span> <span class="token boolean">_</span><span class="token punctuation">,</span> ok <span class="token operator">:=</span> AllRoom<span class="token punctuation">.</span><span class="token function">Load</span><span class="token punctuation">(</span>stringPath<span class="token punctuation">)</span><span class="token punctuation">;</span> ok <span class="token punctuation">{</span>
<span class="token comment">//atomic.AddInt32(&amp;hdlId, 1)</span>
w<span class="token punctuation">.</span><span class="token function">Header</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">Set</span><span class="token punctuation">(</span><span class="token string">&quot;Transfer-Encoding&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;chunked&quot;</span><span class="token punctuation">)</span>
w<span class="token punctuation">.</span><span class="token function">Header</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">Set</span><span class="token punctuation">(</span><span class="token string">&quot;Content-Type&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;video/x-flv&quot;</span><span class="token punctuation">)</span>
w<span class="token punctuation">.</span><span class="token function">Write</span><span class="token punctuation">(</span>avformat<span class="token punctuation">.</span>FLVHeader<span class="token punctuation">)</span>
p <span class="token operator">:=</span> OutputStream<span class="token punctuation">{</span>
Sign<span class="token punctuation">:</span> sign<span class="token punctuation">,</span>
SendHandler<span class="token punctuation">:</span> <span class="token keyword">func</span><span class="token punctuation">(</span>packet <span class="token operator">*</span>pool<span class="token punctuation">.</span>SendPacket<span class="token punctuation">)</span> <span class="token builtin">error</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> avformat<span class="token punctuation">.</span><span class="token function">WriteFLVTag</span><span class="token punctuation">(</span>w<span class="token punctuation">,</span> packet<span class="token punctuation">)</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
SubscriberInfo<span class="token punctuation">:</span> SubscriberInfo<span class="token punctuation">{</span>
ID<span class="token punctuation">:</span> r<span class="token punctuation">.</span>RemoteAddr<span class="token punctuation">,</span> Type<span class="token punctuation">:</span> <span class="token string">&quot;FLV&quot;</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span>
p<span class="token punctuation">.</span><span class="token function">Play</span><span class="token punctuation">(</span>stringPath<span class="token punctuation">)</span>
<span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
w<span class="token punctuation">.</span><span class="token function">WriteHeader</span><span class="token punctuation">(</span><span class="token number">404</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre></div><p>其中，核心逻辑就是创建OutputStream对象，每一个订阅者需要提供SendHandler函数，用来接收来自发布者广播出来的音视频数据。
最后调用该对象的Play函数进行播放。请注意：Play函数会阻塞当前goroutine。</p><h2 id="开发发布者插件"><a href="#开发发布者插件" aria-hidden="true" class="header-anchor">#</a> 开发发布者插件</h2><p>所谓发布者，就是提供音视频数据的程序，例如接收来自OBS、ffmpeg的推流的程序。内置插件中，集群功能里面有一个特殊的发布者，它接收来自源服务器的音视频数据，然后在本服务器中广播音视频。
以此为例，我们需要提供一个结构体定义来表示特定的发布者：</p><div class="language-go extra-class"><pre class="language-go"><code><span class="token keyword">type</span> Receiver <span class="token keyword">struct</span> <span class="token punctuation">{</span>
InputStream
io<span class="token punctuation">.</span>Reader
<span class="token operator">*</span>bufio<span class="token punctuation">.</span>Writer
<span class="token punctuation">}</span>
</code></pre></div><p>其中InputStream 是固定的，必须包含，且必须以组合继承的方式定义。其余的成员则是任意的。
发布者的发布动作需要特定条件的触发，例如在集群插件中，当本服务器有订阅者订阅了某个流，而该流并没有发布者的时候就会触发向源服务器拉流的函数：</p><div class="language-go extra-class"><pre class="language-go"><code><span class="token keyword">func</span> <span class="token function">PullUpStream</span><span class="token punctuation">(</span>streamPath <span class="token builtin">string</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
addr<span class="token punctuation">,</span> err <span class="token operator">:=</span> net<span class="token punctuation">.</span><span class="token function">ResolveTCPAddr</span><span class="token punctuation">(</span><span class="token string">&quot;tcp&quot;</span><span class="token punctuation">,</span> config<span class="token punctuation">.</span>Master<span class="token punctuation">)</span>
<span class="token keyword">if</span> <span class="token function">MayBeError</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span>
<span class="token punctuation">}</span>
conn<span class="token punctuation">,</span> err <span class="token operator">:=</span> net<span class="token punctuation">.</span><span class="token function">DialTCP</span><span class="token punctuation">(</span><span class="token string">&quot;tcp&quot;</span><span class="token punctuation">,</span> <span class="token boolean">nil</span><span class="token punctuation">,</span> addr<span class="token punctuation">)</span>
<span class="token keyword">if</span> <span class="token function">MayBeError</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span>
<span class="token punctuation">}</span>
brw <span class="token operator">:=</span> bufio<span class="token punctuation">.</span><span class="token function">NewReadWriter</span><span class="token punctuation">(</span>bufio<span class="token punctuation">.</span><span class="token function">NewReader</span><span class="token punctuation">(</span>conn<span class="token punctuation">)</span><span class="token punctuation">,</span> bufio<span class="token punctuation">.</span><span class="token function">NewWriter</span><span class="token punctuation">(</span>conn<span class="token punctuation">)</span><span class="token punctuation">)</span>
p <span class="token operator">:=</span> <span class="token operator">&amp;</span>Receiver<span class="token punctuation">{</span>
Reader<span class="token punctuation">:</span> conn<span class="token punctuation">,</span>
Writer<span class="token punctuation">:</span> brw<span class="token punctuation">.</span>Writer<span class="token punctuation">,</span>
<span class="token punctuation">}</span>
<span class="token keyword">if</span> p<span class="token punctuation">.</span><span class="token function">Publish</span><span class="token punctuation">(</span>streamPath<span class="token punctuation">,</span> p<span class="token punctuation">)</span> <span class="token punctuation">{</span>
p<span class="token punctuation">.</span><span class="token function">WriteByte</span><span class="token punctuation">(</span>MSG_SUBSCRIBE<span class="token punctuation">)</span>
p<span class="token punctuation">.</span><span class="token function">WriteString</span><span class="token punctuation">(</span>streamPath<span class="token punctuation">)</span>
p<span class="token punctuation">.</span><span class="token function">WriteByte</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span>
p<span class="token punctuation">.</span><span class="token function">Flush</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token keyword">for</span> <span class="token boolean">_</span><span class="token punctuation">,</span> v <span class="token operator">:=</span> <span class="token keyword">range</span> p<span class="token punctuation">.</span>Subscribers <span class="token punctuation">{</span>
p<span class="token punctuation">.</span><span class="token function">Auth</span><span class="token punctuation">(</span>v<span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span>
<span class="token punctuation">}</span>
<span class="token keyword">defer</span> p<span class="token punctuation">.</span><span class="token function">Cancel</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token keyword">for</span> <span class="token punctuation">{</span>
cmd<span class="token punctuation">,</span> err <span class="token operator">:=</span> brw<span class="token punctuation">.</span><span class="token function">ReadByte</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token keyword">if</span> <span class="token function">MayBeError</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span>
<span class="token punctuation">}</span>
<span class="token keyword">switch</span> cmd <span class="token punctuation">{</span>
<span class="token keyword">case</span> MSG_AUDIO<span class="token punctuation">:</span>
<span class="token keyword">if</span> audio<span class="token punctuation">,</span> err <span class="token operator">:=</span> p<span class="token punctuation">.</span><span class="token function">readAVPacket</span><span class="token punctuation">(</span>avformat<span class="token punctuation">.</span>FLV_TAG_TYPE_AUDIO<span class="token punctuation">)</span><span class="token punctuation">;</span> err <span class="token operator">==</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
p<span class="token punctuation">.</span><span class="token function">PushAudio</span><span class="token punctuation">(</span>audio<span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token keyword">case</span> MSG_VIDEO<span class="token punctuation">:</span>
<span class="token keyword">if</span> video<span class="token punctuation">,</span> err <span class="token operator">:=</span> p<span class="token punctuation">.</span><span class="token function">readAVPacket</span><span class="token punctuation">(</span>avformat<span class="token punctuation">.</span>FLV_TAG_TYPE_VIDEO<span class="token punctuation">)</span><span class="token punctuation">;</span> err <span class="token operator">==</span> <span class="token boolean">nil</span> <span class="token operator">&amp;&amp;</span> <span class="token function">len</span><span class="token punctuation">(</span>video<span class="token punctuation">.</span>Payload<span class="token punctuation">)</span> <span class="token operator">&gt;</span> <span class="token number">2</span> <span class="token punctuation">{</span>
tmp <span class="token operator">:=</span> video<span class="token punctuation">.</span>Payload<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span> <span class="token comment">// 第一个字节保存着视频的相关信息.</span>
video<span class="token punctuation">.</span>VideoFrameType <span class="token operator">=</span> tmp <span class="token operator">&gt;&gt;</span> <span class="token number">4</span> <span class="token comment">// 帧类型 4Bit, H264一般为1或者2</span>
p<span class="token punctuation">.</span><span class="token function">PushVideo</span><span class="token punctuation">(</span>video<span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token keyword">case</span> MSG_AUTH<span class="token punctuation">:</span>
cmd<span class="token punctuation">,</span> err <span class="token operator">=</span> brw<span class="token punctuation">.</span><span class="token function">ReadByte</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token keyword">if</span> <span class="token function">MayBeError</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span>
<span class="token punctuation">}</span>
bytes<span class="token punctuation">,</span> err <span class="token operator">:=</span> brw<span class="token punctuation">.</span><span class="token function">ReadBytes</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span>
<span class="token keyword">if</span> <span class="token function">MayBeError</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span>
<span class="token punctuation">}</span>
subId <span class="token operator">:=</span> strings<span class="token punctuation">.</span><span class="token function">Split</span><span class="token punctuation">(</span><span class="token function">string</span><span class="token punctuation">(</span>bytes<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">:</span><span class="token function">len</span><span class="token punctuation">(</span>bytes<span class="token punctuation">)</span><span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token string">&quot;,&quot;</span><span class="token punctuation">)</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span>
<span class="token keyword">if</span> v<span class="token punctuation">,</span> ok <span class="token operator">:=</span> p<span class="token punctuation">.</span>Subscribers<span class="token punctuation">[</span>subId<span class="token punctuation">]</span><span class="token punctuation">;</span> ok <span class="token punctuation">{</span>
<span class="token keyword">if</span> cmd <span class="token operator">!=</span> <span class="token number">1</span> <span class="token punctuation">{</span>
v<span class="token punctuation">.</span><span class="token function">Cancel</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre></div><p>正在该函数中会向源服务器建立tcp连接，然后发送特定命令表示需要拉流，当我们接收到源服务器的数据的时候，就调用PushVideo和PushAudio函数来广播音视频。</p><p>核心逻辑是调用InputStream的Publish以及PushVideo、PushAudio函数</p><h2 id="开发钩子插件"><a href="#开发钩子插件" aria-hidden="true" class="header-anchor">#</a> 开发钩子插件</h2><p>钩子插件就是在服务器的关键逻辑处插入的函数调用，方便扩展服务器的功能，比如对连接进行验证，或者触发一些特殊的发布者。
目前提供的钩子包括</p><ul><li>当发布者开始发布时 <code>OnPublishHooks.AddHook(onPublish)</code>
例如：</li></ul><div class="language-go extra-class"><pre class="language-go"><code><span class="token keyword">func</span> <span class="token function">onPublish</span><span class="token punctuation">(</span>r <span class="token operator">*</span>Room<span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">for</span> <span class="token boolean">_</span><span class="token punctuation">,</span> v <span class="token operator">:=</span> <span class="token keyword">range</span> r<span class="token punctuation">.</span>Subscribers <span class="token punctuation">{</span>
<span class="token keyword">if</span> err <span class="token operator">:=</span> <span class="token function">CheckSign</span><span class="token punctuation">(</span>v<span class="token punctuation">.</span>Sign<span class="token punctuation">)</span><span class="token punctuation">;</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
v<span class="token punctuation">.</span><span class="token function">Cancel</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre></div><p>此时可以访问房间里面的订阅者，对其进行验证。</p><ul><li>当有订阅者订阅了某个流时，<code>OnSubscribeHooks.AddHook(onSubscribe)</code>
例如：</li></ul><div class="language-go extra-class"><pre class="language-go"><code><span class="token keyword">func</span> <span class="token function">onSubscribe</span><span class="token punctuation">(</span>s <span class="token operator">*</span>OutputStream<span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">if</span> s<span class="token punctuation">.</span>Publisher <span class="token operator">==</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
<span class="token keyword">go</span> <span class="token function">PullUpStream</span><span class="token punctuation">(</span>s<span class="token punctuation">.</span>StreamPath<span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre></div><p>拉取源服务器的流</p></div><div class="page-edit"><!----><!----></div><div class="page-nav"><p class="inner"><span class="prev">
← <a href="/docs/" class="prev router-link-active">
起步
</a></span><span class="next"><a href="/docs/history.html">
更新日志
</a> →
</span></p></div></div></div></div>
<script src="/docs/assets/js/app.d51c815b.js" defer></script><script src="/docs/assets/js/2.190ec46a.js" defer></script>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink