?? 利用 directshow 開(kāi)發(fā)自己的 filter(7) - directshow - 技術(shù)應(yīng)用 - 豆豆網(wǎng).htm
字號(hào):
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
<!-- saved from url=(0051)http://tech.ddvip.com/2006-04/11443572604083_7.html -->
<HTML xmlns="http://www.w3.org/1999/xhtml"><HEAD><TITLE>利用 DirectShow 開(kāi)發(fā)自己的 Filter(7) - DirectShow - 技術(shù)應(yīng)用 - 豆豆網(wǎng)</TITLE><!-- 本模板由 legmail 最后于 2007-09-19 13:47 修改 -->
<META http-equiv=Content-Type content="text/html; charset=gb2312"><LINK
href="利用 DirectShow 開(kāi)發(fā)自己的 Filter(7) - DirectShow - 技術(shù)應(yīng)用 - 豆豆網(wǎng).files/tech_content.css"
type=text/css rel=stylesheet>
<STYLE>.nav {
BACKGROUND: #f2f6fb; WORD-SPACING: 20px; TEXT-INDENT: 5px; LINE-HEIGHT: 28px; BORDER-BOTTOM: #aaa 1px solid; HEIGHT: 28px; TEXT-ALIGN: left
}
</STYLE>
<SCRIPT><!--document.domain = 'ddvip.com';var node = 'tech';var subid = "2006-04-07_4083";--></SCRIPT>
<META content="MSHTML 6.00.2900.3314" name=GENERATOR></HEAD>
<BODY>
<DIV id=main><!-- 頁(yè)面頭部 -->
<DIV class=header>
<DIV class=top_nav><A href="http://www.ddvip.com/">豆豆首頁(yè)</A> - <A
href="http://down.ddvip.com/">軟件下載</A> - <A
href="http://code.ddvip.com/">源碼下載</A> - <A
href="http://down.ddvip.com/news">軟件資訊</A> - <A
href="http://book.ddvip.com/">小說(shuō)閱讀</A> - <A
href="http://club.ddvip.com/">技術(shù)論壇</A> - <A
href="http://man.ddvip.com/">技術(shù)手冊(cè)</A> - <A
href="http://www.ddvip.com/link">網(wǎng)址導(dǎo)航</A> - <A
href="http://law.ddvip.com/">法律資訊</A> - <A
href="http://blog.ddvip.com/">博客人生</A> </DIV>
<DIV class=sitelogo><IMG alt=網(wǎng)站LOGO
src="利用 DirectShow 開(kāi)發(fā)自己的 Filter(7) - DirectShow - 技術(shù)應(yīng)用 - 豆豆網(wǎng).files/logo.gif">
<DIV class=top_ad_580x60 id=top_ad_580x60></DIV></DIV>
<DIV class=clear></DIV>
<UL class=global_nav>
<LI><A href="http://tech.ddvip.com/index.html">技術(shù)首頁(yè)</A> </LI>
<LI><A href="http://tech.ddvip.com/os/index.html">操作系統(tǒng)</A> </LI>
<LI class=global_nav_c><A
href="http://tech.ddvip.com/program/index.html">程序設(shè)計(jì)</A> </LI>
<LI><A href="http://tech.ddvip.com/network/index.html">網(wǎng)絡(luò)技術(shù)</A> </LI>
<LI><A href="http://tech.ddvip.com/network/server/index.html">服務(wù)器</A> </LI>
<LI><A href="http://tech.ddvip.com/safe/index.html">安全技術(shù)</A> </LI>
<LI><A href="http://tech.ddvip.com/web/index.html">Web開(kāi)發(fā)</A> </LI>
<LI><A href="http://tech.ddvip.com/db/index.html">數(shù)據(jù)庫(kù)</A> </LI>
<LI><A href="http://tech.ddvip.com/pic/index.html">平面設(shè)計(jì)</A> </LI>
<LI><A href="http://tech.ddvip.com/mediamovice/index.html">三維動(dòng)畫(huà)</A> </LI>
<LI><A href="http://tech.ddvip.com/cert/index.html">認(rèn)證考試</A> </LI>
<LI><A href="http://tech.ddvip.com/soft/index.html">軟件應(yīng)用</A> </LI>
<LI><A href="http://tech.ddvip.com/machine/index.html">機(jī)械電子</A> </LI></UL>
<DIV class=nav><A
href="http://tech.ddvip.com/program/vc/visualstudio/index.html">VisualStudio</A>
<A href="http://tech.ddvip.com/program/vc/interface/index.html">界面</A> <A
href="http://tech.ddvip.com/program/vc/view/index.html">視圖</A> <A
href="http://tech.ddvip.com/program/vc/pic/index.html">圖像</A> <A
href="http://tech.ddvip.com/program/vc/multimedia/index.html">多媒體</A> <A
href="http://tech.ddvip.com/program/vc/database/index.html">數(shù)據(jù)庫(kù)</A> <A
href="http://tech.ddvip.com/program/vc/windows/index.html">Windows系統(tǒng)</A> <A
href="http://tech.ddvip.com/program/vc/file/index.html">文件</A> <A
href="http://tech.ddvip.com/program/vc/comnet/index.html">COM/.NET</A> <A
href="http://tech.ddvip.com/program/vc/network/index.html">網(wǎng)絡(luò)通信</A> <A
href="http://tech.ddvip.com/program/vc/integrated/index.html">綜合</A> <A
href="http://tech.ddvip.com/program/softjeer/index.html">軟件工程</A> </DIV></DIV>
<DIV class=tlad id=tech_content_tl></DIV><!-- 內(nèi)容部分 -->
<DIV class=content>
<DIV class=location><A href="http://www.ddvip.com/" target=_balnk>豆豆網(wǎng)</A> >
<A href="http://tech.ddvip.com/index.html">技術(shù)應(yīng)用</A> > <A
href="http://tech.ddvip.com/program/index.html">程序設(shè)計(jì)</A> > <A
href="http://tech.ddvip.com/program/vc/index.html">VC</A> > <A
href="http://tech.ddvip.com/program/vc/multimedia/index.html">VC多媒體編程</A> >
正文 </DIV>
<DIV class=content_left>
<DIV class=article>
<DIV class=article_title>
<H1>利用 DirectShow 開(kāi)發(fā)自己的 Filter</H1>
<DIV class=title_bottom>
<SCRIPT language=javascript
src="利用 DirectShow 開(kāi)發(fā)自己的 Filter(7) - DirectShow - 技術(shù)應(yīng)用 - 豆豆網(wǎng).files/title_bottom.js"></SCRIPT>
</DIV>
<P><A href="http://www.ddvip.com/">豆豆網(wǎng)</A> <A
href="http://tech.ddvip.com/">技術(shù)應(yīng)用頻道</A> 2006年07月23日
<A href="http://club.ddvip.com/">社區(qū)交流</A></P></DIV>
<DIV class=article_content>
<DIV class=title_bottom_cpr>
<SCRIPT
src="利用 DirectShow 開(kāi)發(fā)自己的 Filter(7) - DirectShow - 技術(shù)應(yīng)用 - 豆豆網(wǎng).files/ad_title_bottom.js"></SCRIPT>
</DIV><!--ID="929"-->
<DIV class=searchhot>關(guān)鍵字: <A href="http://tech.ddvip.com/search.php?key=漢諾塔"
target=_blank>漢諾塔</A> <A href="http://tech.ddvip.com/search.php?key=VC++編程"
target=_blank>VC++編程</A> <A href="http://tech.ddvip.com/search.php?key=應(yīng)用程序"
target=_blank>應(yīng)用程序</A> <A href="http://tech.ddvip.com/search.php?key=無(wú)閃爍刷屏"
target=_blank>無(wú)閃爍刷屏</A> <A href="http://tech.ddvip.com/search.php?key=DirectX"
target=_blank>DirectX</A> <A href="http://tech.ddvip.com/search.php?key=圖形特技"
target=_blank>圖形特技</A> </DIV>
<DIV class=article_z>
<H2>本文詳細(xì)介紹利用 DirectShow 開(kāi)發(fā)自己的 Filter </H2></DIV>
<DIV class=article_ad>
<SCRIPT language=javascript
src="利用 DirectShow 開(kāi)發(fā)自己的 Filter(7) - DirectShow - 技術(shù)應(yīng)用 - 豆豆網(wǎng).files/ads_250x250.js"></SCRIPT>
</DIV>
<DIV class=article_c id=fontsize>
<P> 最后,我們看一下Filter類的實(shí)現(xiàn)。首先當(dāng)然也要實(shí)現(xiàn)基類的所有純虛函數(shù)。除此之外,F(xiàn)ilter還要實(shí)現(xiàn)CreateInstance以提供COM的入口,實(shí)現(xiàn)NonDelegatingQueryInterface以暴露支持的接口。如果我們創(chuàng)建了自定義的輸入、輸出Pin,一般我們還要重載GetPinCount和GetPin兩個(gè)函數(shù)。</P>
<P> 這里我主要為了舉例,所以簡(jiǎn)單寫(xiě)的filter沒(méi)有Pin接口,但在我的demo里的Filter,卻是有個(gè)out pin和一個(gè)input
pin。我的Filter類的定義如下:</P>
<P> <CODE>class CMyFilter : public CCritSec, public
CBaseFilter<BR>{<BR>public:<BR> CMyFilter(TCHAR *pName,LPUNKNOWN pUnk,HRESULT
*hr);<BR> virtual ~CMyFilter();<BR> static CUnknown * WINAPI
CreateInstance(LPUNKNOWN pUnk, HRESULT *phr);<BR> CBasePin *GetPin(int
n);<BR> int GetPinCount(); <BR>} </CODE>
<P> 注:因?yàn)榛愂且粋€(gè)純虛的基類,所以在你的filter一定要派生一個(gè)其中的純虛函數(shù),否則編譯器會(huì)提示你的派生類也是一個(gè)純虛類,你在創(chuàng)建這個(gè)com組件對(duì)象的時(shí)候,純虛類是沒(méi)法創(chuàng)建對(duì)象的。</P>
<P> 2、給自己的Filter生成一個(gè)CLSID</P>
<P> 你可以用Guidgen or
Uuidgen給自己的Filter生成一個(gè)128位的ID號(hào),然后利用DEFINE_GUID宏在Filter的頭文件聲明該Filter的CLSID;</P><CODE>[myFilter.h]<BR>//
{1915C5C7-02AA-415f-890F-76D94C85AAF1}<BR>DEFINE_GUID(CLSID_MYFilter,<BR>0x1915c5c7,
0x2aa, 0x415f, 0x89, 0xf, 0x76, 0xd9, 0x4c, 0x85, 0xaa, 0xf1);</CODE>
<P> 這個(gè)CLSID_MYFilter在類廠數(shù)組用到,在注冊(cè)Filter時(shí)也要用到。</P>
<P> 3、CMyFilter類的簡(jiǎn)單實(shí)現(xiàn)</P>
<P> 這個(gè)類純粹為了演示用,所以特別簡(jiǎn)單,你可以參考我的demo,那個(gè)filter寫(xiě)的功能比較全。</P></DIV><!-- 分頁(yè) -->
<DIV class=page><A
href="http://tech.ddvip.com/2006-04/11443572604083_6.html">上一頁(yè)</A><A
href="http://tech.ddvip.com/2006-04/11443572604083.html">1</A><A
href="http://tech.ddvip.com/2006-04/11443572604083_2.html">2</A><A
href="http://tech.ddvip.com/2006-04/11443572604083_3.html">3</A><A
href="http://tech.ddvip.com/2006-04/11443572604083_4.html">4</A><A
href="http://tech.ddvip.com/2006-04/11443572604083_5.html">5</A><A
href="http://tech.ddvip.com/2006-04/11443572604083_6.html">6</A><SPAN
class=current>7</SPAN><A
href="http://tech.ddvip.com/2006-04/11443572604083_8.html">8</A><A
href="http://tech.ddvip.com/2006-04/11443572604083_9.html">9</A><A
href="http://tech.ddvip.com/2006-04/11443572604083_8.html">下一頁(yè)</A></DIV><!-- 分頁(yè)end -->
<P
style="PADDING-RIGHT: 4px; FONT-SIZE: 12px; COLOR: #000000; TEXT-ALIGN: right">作者:智慧的魚(yú)
責(zé)編:豆豆技術(shù)應(yīng)用</P>
<DIV id=art_content_end_468x60>
<SCRIPT
src="利用 DirectShow 開(kāi)發(fā)自己的 Filter(7) - DirectShow - 技術(shù)應(yīng)用 - 豆豆網(wǎng).files/ads_468x60.js"></SCRIPT>
</DIV>
<DIV class=realated_search>點(diǎn)擊搜索更多"<A
href="http://tech.ddvip.com/search.php?key=DirectShow"
target=_blank>DirectShow</A>"相關(guān)信息</DIV></DIV>
<DIV class=related>
<DIV class=relatedtop>與“利用 DirectShow 開(kāi)發(fā)自己的 Filter”相關(guān)的文章</DIV>
<UL>
<LI><A
href="http://tech.ddvip.com/2007-03/117395236821211.html">VC+DirectShow對(duì)視頻進(jìn)行圖片處理之二</A>
</LI>
<LI><A
href="http://tech.ddvip.com/2007-03/117395231221210.html">VC+DirectShow對(duì)視頻進(jìn)行圖片處理之三</A>
</LI>
<LI><A
href="http://tech.ddvip.com/2007-03/117390782121190.html">VC+DirectShow對(duì)視頻進(jìn)行圖片處理之四</A>
</LI>
<LI><A
href="http://tech.ddvip.com/2007-03/117390773621189.html">VC+DirectShow對(duì)視頻進(jìn)行圖片處理之五</A>
</LI>
<LI><A
href="http://tech.ddvip.com/2007-03/117390736921184.html">VC+DirectShow對(duì)視頻進(jìn)行圖片處理之六</A>
</LI>
<LI><A
href="http://tech.ddvip.com/2006-04/11443595404132.html">基于DirectShow非線性編輯DES</A>
</LI>
<LI><A
href="http://tech.ddvip.com/2006-04/11443554004063.html">用DirectShow抓取影片幀</A>
</LI>
<LI><A
href="http://tech.ddvip.com/2006-04/11443526404035.html">使用DirectShow驅(qū)動(dòng)攝像頭</A>
</LI>
<LI><A
href="http://tech.ddvip.com/2006-04/11443525804034.html">在VC中調(diào)用DirectShow全屏播放視頻</A>
</LI></UL></DIV>
<DIV class=clear></DIV>
<DIV class=related>
<DIV class=relatedtop>本欄目更新</DIV>
<UL>
<LI><A href="http://tech.ddvip.com/2007-09/118923357233810.html">漢諾塔游戲的設(shè)計(jì)</A>
</LI>
<LI><A
href="http://tech.ddvip.com/2007-03/117475629722007.html">也玩視覺(jué)效果:VC++編程實(shí)現(xiàn)仿真火焰</A>
</LI>
<LI><A
href="http://tech.ddvip.com/2007-03/117449675921901.html">將視頻演示作為應(yīng)用程序的啟動(dòng)封面</A>
</LI>
<LI><A
href="http://tech.ddvip.com/2007-03/117449579821897.html">VC無(wú)閃爍刷屏技術(shù)的實(shí)現(xiàn)</A>
</LI>
?? 快捷鍵說(shuō)明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號(hào)
Ctrl + =
減小字號(hào)
Ctrl + -