datacodeccompressor.html

这个是java的quicktime for java 的详细使用文档

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<TD><CODE>getClass, hashCode, notify, notifyAll, wait, wait, wait</CODE></TD>
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<A NAME="DataCodecCompressor(int)"><!-- --></A><H3>
DataCodecCompressor</H3>
<PRE>
public <B>DataCodecCompressor</B>(int&nbsp;subType)
                    throws <A HREF="../../../quicktime/QTException.html">QTException</A></PRE>
<DL>
<DD>Opens the specified data codec compressor component, 'dcom', with the given subType.
	 <BR><BR><b> <a href="http://developer.apple.com/techpubs/quicktime/qtdevdocs/REF/refComponentMgr.8.htm#28411">QuickTime::OpenADefaultComponent</a> </b><BR><BR>
<DT><B>Parameters:</B><DD><CODE>subType</CODE> - the compressor type that will be used to compress the data</DL>
</DD>
</DL>
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<A NAME="DataCodecCompressor(quicktime.std.comp.ComponentIdentifier)"><!-- --></A><H3>
DataCodecCompressor</H3>
<PRE>
public <B>DataCodecCompressor</B>(<A HREF="../../../quicktime/std/comp/ComponentIdentifier.html">ComponentIdentifier</A>&nbsp;comp)
                    throws <A HREF="../../../quicktime/QTException.html">QTException</A></PRE>
<DL>
<DD>Given a component identifier it opens the specified component. The component type
 must be 'dcom' or an exception will be thrown as it is not a DataCodecCompressor.
	 <BR><BR><b> <a href="http://developer.apple.com/techpubs/quicktime/qtdevdocs/REF/refComponentMgr.8.htm#10078">QuickTime::OpenAComponent</a> </b><BR><BR>
<DT><B>Parameters:</B><DD><CODE>comp</CODE> - the component identifier to open</DL>
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<A NAME="compress(quicktime.util.QTPointerRef, quicktime.util.QTPointerRef)"><!-- --></A><H3>
compress</H3>
<PRE>
public <A HREF="../../../quicktime/std/qtcomponents/DataCodecInfo.html">DataCodecInfo</A> <B>compress</B>(<A HREF="../../../quicktime/util/QTPointerRef.html">QTPointerRef</A>&nbsp;srcData,
                              <A HREF="../../../quicktime/util/QTPointerRef.html">QTPointerRef</A>&nbsp;dstData)
                       throws <A HREF="../../../quicktime/std/StdQTException.html">StdQTException</A></PRE>
<DL>
<DD>Compress the specified data.
 Before calling the DataCodecCompress function, you should call the
 DataCodecGetCompressBufferSize function to obtain the maximum possible size
 of the compressed data that will be returned. You can then use this value as the
 value of the dstBufferSize parameter. Note that a buffer for compressed data
 that is the same size as the uncompressed data may not be large enough: in
 some cases, the size of the compressed data can be larger than the size of the
 decompressed data.
	 <BR><BR><b> <a href="http://developer.apple.com/techpubs/quicktime/qtdevdocs/REF/refDataCodec.6.htm#refDat7">QuickTime::DataCodecCompress</a> </b><BR><BR>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>srcData</CODE> - Contains a pointer to the data to be compressed.<DD><CODE>dstData</CODE> - Contains a pointer to the buffer in which to store the compressed data.<DT><B>Returns:</B><DD>a DataCodecInfo that contains information about the compression.</DL>
</DD>
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<A NAME="getCompressBufferSize(int)"><!-- --></A><H3>
getCompressBufferSize</H3>
<PRE>
public int <B>getCompressBufferSize</B>(int&nbsp;srcSize)
                          throws <A HREF="../../../quicktime/std/StdQTException.html">StdQTException</A></PRE>
<DL>
<DD>Returns the estimated maximum size of compressing the specified size bytes
 using this compressor.
 <BR><BR><b>QuickTime::DataCodecGetCompressBufferSize</b><DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>srcSize</CODE> - the size of the buffer that will be compressed.<DT><B>Returns:</B><DD>the size of the buffer you should allocate to contain the specified srcSize data</DL>
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