<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >oggvorbis</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="函数参考" HREF="funcref.html"><LINK REL="PREVIOUS" TITLE="PDO_ODBC DSN" HREF="ref.pdo-odbc.connection.html"><LINK REL="NEXT" TITLE="Usage" HREF="oggvorbis.usage.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="reference" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="ref.pdo-odbc.connection.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="oggvorbis.usage.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="reference" ><A NAME="ref.oggvorbis" ></A ><DIV CLASS="TITLEPAGE" ><H1 CLASS="title" >CX. oggvorbis</H1 ><DIV CLASS="PARTINTRO" ><A NAME="AEN161967" ></A ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="oggvorbis.intro" >简介</A ></H1 ><P > The OGG/Vorbis file format, as defined by <A HREF="http://www.vorbis.com/" TARGET="_top" >http://www.vorbis.com/</A >, is a scheme for compressing audio streams by multiple factors with a minimum of quality loss. This extension adds Ogg Vorbis support to PHP's <A HREF="wrappers.html" >URL Wrappers</A >. When used in read mode, compressed OGG/Vorbis data is expanded to raw PCM audio in one of six PCM encoding formats listed below. </P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="oggvorbis.requirements" >需求</A ></H1 ><P > This extension requires <TT CLASS="literal" >PHP >= 4.3.0</TT >, <A HREF="http://www.vorbis.com/setup/" TARGET="_top" >libogg</A > >= 1.0, and <A HREF="http://www.vorbis.com/setup/" TARGET="_top" >libvorbis</A > >= 1.0. </P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="oggvorbis.configuration" >运行时配置</A ></H1 ><P >本扩展模块在 <TT CLASS="filename" >php.ini</TT > 中未定义任何配置选项。</P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="oggvorbis.installation" >安装</A ></H1 ><P > 安装此 PECL 扩展库的信息可在手册中标题为 <A HREF="install.pecl.html" >PECL 扩展库安装</A >的一章中找到。 更多信息如新版本,下载,源文件,维护者信息以及更新日志等可以在这里找到: <A HREF="http://pecl.php.netoggvorbis" TARGET="_top" >http://pecl.php.netoggvorbis</A > </P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="oggvorbis.contexts" >Context options</A ></H1 ><DIV CLASS="table" ><A NAME="AEN161990" ></A ><P ><B >表 1. OGG/Vorbis tuning options</B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><COL><COL><THEAD ><TR ><TH >Option</TH ><TH >Definition</TH ><TH >Relevance</TH ><TH >Default</TH ></TR ></THEAD ><TBODY ><TR ><TD >pcm_mode</TD ><TD >PCM byte encoding used. See constants below.</TD ><TD >Read / Write</TD ><TD ><TT CLASS="constant" ><B >OGGVORBIS_PCM_S16_LE</B ></TT ></TD ></TR ><TR ><TD >rate</TD ><TD >PCM Sampling rate. Measured in Hz.</TD ><TD >Write only</TD ><TD ><TT CLASS="constant" ><B >44100</B ></TT ></TD ></TR ><TR ><TD >bitrate</TD ><TD > Vorbis Average Bitrate Encoding / Variable Bitrate Encoding. Measured in bps (ABR) or Quality level (VBR: 0.0 to 1.0). 128000 ABR is rough equal to 0.4 VBR. </TD ><TD >Write only</TD ><TD ><TT CLASS="constant" ><B >128000</B ></TT ></TD ></TR ><TR ><TD >channels</TD ><TD >Number of PCM channels. 1 == Mono, 2 == Stereo.</TD ><TD >Write only</TD ><TD ><TT CLASS="constant" ><B >2</B ></TT ></TD ></TR ><TR ><TD >serialno</TD ><TD > Serial Number of stream within file. Must be unique within file. Because of the potential to select a duplicate serial number within a chained file, make efforts to manually assign unique numbers when encoding. </TD ><TD >Write only</TD ><TD ><SPAN CLASS="emphasis" ><I CLASS="emphasis" >Random</I ></SPAN ></TD ></TR ><TR ><TD >comments</TD ><TD > Associative array of file comments. Will be translated to <TT CLASS="literal" >strtoupper($name) . "=$value"</TT >. Note: This context option is not available in oggvorbis-0.1 </TD ><TD >Write only</TD ><TD ><TT CLASS="constant" ><B >array('ENCODER' => 'PHP/OggVorbis, http://pear.php.net/oggvorbis')</B ></TT ></TD ></TR ></TBODY ></TABLE ></DIV ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="oggvorbis.constants" >预定义常量</A ></H1 ><P >以下常量由本扩展模块定义,因此只有在本扩展模块被编译到 PHP 中,或者在运行时被动态加载后才有效。</P ><DIV CLASS="table" ><A NAME="AEN162040" ></A ><P ><B >表 2. OGG/Vorbis supports PCM encodings in the following formats</B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><THEAD ><TR ><TH >Constant</TH ><TH >Definition</TH ></TR ></THEAD ><TBODY ><TR ><TD ><TT CLASS="constant" ><B >OGGVORBIS_PCM_U8</B ></TT ></TD ><TD >Unsigned 8-bit PCM.</TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >OGGVORBIS_PCM_S8</B ></TT ></TD ><TD >Signed 8-bit PCM.</TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >OGGVORBIS_PCM_U16_LE</B ></TT ></TD ><TD >Unsigned 16-bit PCM. Little Endian byte order.</TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >OGGVORBIS_PCM_U16_BE</B ></TT ></TD ><TD >Unsigned 16-bit PCM. Big Endian byte order.</TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >OGGVORBIS_PCM_S16_LE</B ></TT ></TD ><TD >Signed 16-bit PCM. Little Endian byte order.</TD ></TR ><TR ><TD ><TT CLASS="constant" ><B >OGGVORBIS_PCM_S16_BE</B ></TT ></TD ><TD >Signed 16-bit PCM. Big Endian byte order.</TD ></TR ></TBODY ></TABLE ></DIV ></DIV ></DIV ><DIV CLASS="TOC" ><DL ><DT ><B >目录</B ></DT ><DT ><A HREF="oggvorbis.usage.html" >Usage</A > -- Examples on using the ogg:// wrapper. </DT ></DL ></DIV ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="ref.pdo-odbc.connection.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="oggvorbis.usage.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >PDO_ODBC DSN</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="funcref.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Usage</TD ></TR ></TABLE ></DIV ></BODY ></HTML >