?? constnts_984z.htm
字號:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML DIR="LTR"><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=iso8859-1">
</HEAD>
<TITLE>LINEMEDIACONTROL_ Constants</TITLE>
<SCRIPT SRC="/library/psdk/linkcss.js"></SCRIPT>
<META NAME="MS-HKWD" CONTENT="LINEMEDIACONTROL_ Constants">
<META NAME="MS-HAID" CONTENT="_tapi2_linemediacontrol__constants">
</HEAD>
<BODY TOPMARGIN="0">
<!--TOOLBAR_START-->
<!--TOOLBAR_EXEMPT-->
<!--TOOLBAR_END-->
<!--SYNC_START-->
<script language="JavaScript" src='/library/synch.js'></script>
<!--SYNC_END-->
<H1><A NAME="_tapi2_linemediacontrol__constants"></A>LINEMEDIACONTROL_ Constants</H1>
<P>The LINEMEDIACONTROL_ bit-flag constants describe a set of generic operations on media streams. The interpretations are determined by the media stream. The line device must have the media-control capability for any media-control operation to be effective.
<DL>
<DT>LINEMEDIACONTROL_NONE </DT>
<DD>No change is to be made to the media stream. </DD>
<DT>LINEMEDIACONTROL_PAUSE </DT>
<DD>Temporarily pause the media stream.
<P>The speed of the media stream is returned to normal.
</DD>
<DT>LINEMEDIACONTROL_RATEDOWN </DT>
<DD>The speed of the media stream is decreased by some stream-defined quantity. </DD>
<DT>LINEMEDIACONTROL_RATENORMAL </DT>
<DT>LINEMEDIACONTROL_RATEUP </DT>
<DD>The speed of the media stream is increased by some stream-defined quantity. </DD>
<DT>LINEMEDIACONTROL_RESET </DT>
<DD>Reset the media stream. Equivalent to an end-of-input. All buffers are released. </DD>
<DT>LINEMEDIACONTROL_RESUME </DT>
<DD>Resume a paused media stream. </DD>
<DT>LINEMEDIACONTROL_START </DT>
<DD>Start the media stream. </DD>
<DT>LINEMEDIACONTROL_VOLUMEDOWN </DT>
<DD>The amplitude of the media stream is decreased by some stream-defined quantity. </DD>
<DT>LINEMEDIACONTROL_VOLUMENORMAL </DT>
<DD>The amplitude of the media stream is returned to normal. </DD>
<DT>LINEMEDIACONTROL_VOLUMEUP </DT>
<DD>The amplitude of the media stream is increased by some stream-defined quantity.
</DD>
</DL>
<P>The high-order 16 bits can be assigned for device-specific extensions. The low-order 16 bits are reserved. </P>
<P>Media control is provided to improve performance of actions on media streams in response to telephony-related events. The application should normally manage a media stream through the media-specific API. The media-control functionality provided here is not intended to replace the native media APIs. </P>
<P>Media-control actions can be associated with the detection of digits, the detection of tones, the transition into a call state, and the detection of a media type. Consult a line's device capabilities to determine whether media control is available on the line. </P>
<H4><A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/sdkintro/guide_927n.htm \n\n這個文件不能通過 Teleport Pro 取回, 因為 地址在一個域或為它的開始地址設定的邊界的外部路徑上. \n\n你想從服務器打開它嗎?'))window.location='http://msdn.microsoft.com/library/psdk/sdkintro/guide_927n.htm'" tppabs="http://msdn.microsoft.com/library/psdk/sdkintro/guide_927n.htm">Requirements</A> </H4>
<P><B> Windows NT/2000: </B>Requires Windows NT 4.0 SP3 or later.<BR>
<B> Windows 95/98: </B>Requires Windows 95 or later.<BR>
<B> Version: </B>Requires TAPI 2.0 or later.<BR>
<B> Header: </B>Declared in Tapi.h.</P>
<DIV CLASS="footer">Built on Monday, August 14, 2000</DIV>
<!--FOOTER_START-->
<DIV CLASS="footer" STYLE="color:#000000;font-size:90%;">
<A HREF="mailto:sdkfdbk@microsoft.com">Send feedback</A> to the Platform SDK.</P>
<P><A HREF="javascript:if(confirm('http://msdn.microsoft.com/isapi/gomscom.asp?TARGET=/info/cpyright.htm \n\n這個文件不能通過 Teleport Pro 取回, 因為 地址在一個域或為它的開始地址設定的邊界的外部路徑上. \n\n你想從服務器打開它嗎?'))window.location='http://msdn.microsoft.com/isapi/gomscom.asp?TARGET=/info/cpyright.htm'" tppabs="http://msdn.microsoft.com/isapi/gomscom.asp?TARGET=/info/cpyright.htm" TARGET="_top">© 1999 Microsoft Corporation. All rights reserved. Terms of use.</A></P>
</DIV>
<!--FOOTER_END-->
</BODY>
</HTML>
?? 快捷鍵說明
復制代碼
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
Ctrl + =
減小字號
Ctrl + -