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opsu-dance/lib/jlayer1.0.1/javadoc/javazoom/jl/decoder/Decoder.html
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2014-06-29 22:17:04 -04:00

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Decoder
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javazoom.jl.decoder</FONT>
<BR>
Class Decoder</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>javazoom.jl.decoder.Decoder</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../javazoom/jl/decoder/DecoderErrors.html" title="interface in javazoom.jl.decoder">DecoderErrors</A>, <A HREF="../../../javazoom/jl/decoder/JavaLayerErrors.html" title="interface in javazoom.jl.decoder">JavaLayerErrors</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public class <B>Decoder</B><DT>extends java.lang.Object<DT>implements <A HREF="../../../javazoom/jl/decoder/DecoderErrors.html" title="interface in javazoom.jl.decoder">DecoderErrors</A></DL>
</PRE>
<P>
The <code>Decoder</code> class encapsulates the details of
decoding an MPEG audio frame.
<P>
<P>
<DL>
<DT><B>Since:</B></DT>
<DD>0.0.5</DD>
<DT><B>Version:</B></DT>
<DD>0.0.7 12/12/99</DD>
</DL>
<HR>
<P>
<!-- ======== NESTED CLASS SUMMARY ======== -->
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<CODE>static&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.Params.html" title="class in javazoom.jl.decoder">Decoder.Params</A></B></CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The <code>Params</code> class presents the customizable
aspects of the decoder.</TD>
</TR>
</TABLE>
&nbsp;<!-- =========== FIELD SUMMARY =========== -->
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<B>Field Summary</B></FONT></TH>
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&nbsp;<A NAME="fields_inherited_from_class_javazoom.jl.decoder.DecoderErrors"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Fields inherited from interface javazoom.jl.decoder.<A HREF="../../../javazoom/jl/decoder/DecoderErrors.html" title="interface in javazoom.jl.decoder">DecoderErrors</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../javazoom/jl/decoder/DecoderErrors.html#ILLEGAL_SUBBAND_ALLOCATION">ILLEGAL_SUBBAND_ALLOCATION</A>, <A HREF="../../../javazoom/jl/decoder/DecoderErrors.html#UNKNOWN_ERROR">UNKNOWN_ERROR</A>, <A HREF="../../../javazoom/jl/decoder/DecoderErrors.html#UNSUPPORTED_LAYER">UNSUPPORTED_LAYER</A></CODE></TD>
</TR>
</TABLE>
&nbsp;<A NAME="fields_inherited_from_class_javazoom.jl.decoder.JavaLayerErrors"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Fields inherited from interface javazoom.jl.decoder.<A HREF="../../../javazoom/jl/decoder/JavaLayerErrors.html" title="interface in javazoom.jl.decoder">JavaLayerErrors</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../javazoom/jl/decoder/JavaLayerErrors.html#BITSTREAM_ERROR">BITSTREAM_ERROR</A>, <A HREF="../../../javazoom/jl/decoder/JavaLayerErrors.html#DECODER_ERROR">DECODER_ERROR</A></CODE></TD>
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&nbsp;
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<B>Constructor Summary</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#Decoder()">Decoder</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates a new <code>Decoder</code> instance with default
parameters.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#Decoder(javazoom.jl.decoder.Decoder.Params)">Decoder</A></B>(<A HREF="../../../javazoom/jl/decoder/Decoder.Params.html" title="class in javazoom.jl.decoder">Decoder.Params</A>&nbsp;params0)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates a new <code>Decoder</code> instance with default
parameters.</TD>
</TR>
</TABLE>
&nbsp;
<!-- ========== METHOD SUMMARY =========== -->
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<B>Method Summary</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../javazoom/jl/decoder/Obuffer.html" title="class in javazoom.jl.decoder">Obuffer</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#decodeFrame(javazoom.jl.decoder.Header, javazoom.jl.decoder.Bitstream)">decodeFrame</A></B>(<A HREF="../../../javazoom/jl/decoder/Header.html" title="class in javazoom.jl.decoder">Header</A>&nbsp;header,
<A HREF="../../../javazoom/jl/decoder/Bitstream.html" title="class in javazoom.jl.decoder">Bitstream</A>&nbsp;stream)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Decodes one frame from an MPEG audio bitstream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="../../../javazoom/jl/decoder/Decoder.Params.html" title="class in javazoom.jl.decoder">Decoder.Params</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#getDefaultParams()">getDefaultParams</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#getOutputBlockSize()">getOutputBlockSize</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Retrieves the maximum number of samples that will be written to
the output buffer when one frame is decoded.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#getOutputChannels()">getOutputChannels</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Retrieves the number of channels of PCM samples output by
this decoder.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#getOutputFrequency()">getOutputFrequency</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Retrieves the sample frequency of the PCM samples output
by this decoder.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;<A HREF="../../../javazoom/jl/decoder/DecoderException.html" title="class in javazoom.jl.decoder">DecoderException</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#newDecoderException(int)">newDecoderException</A></B>(int&nbsp;errorcode)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;<A HREF="../../../javazoom/jl/decoder/DecoderException.html" title="class in javazoom.jl.decoder">DecoderException</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#newDecoderException(int, java.lang.Throwable)">newDecoderException</A></B>(int&nbsp;errorcode,
java.lang.Throwable&nbsp;throwable)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;<A HREF="../../../javazoom/jl/decoder/FrameDecoder.html" title="interface in javazoom.jl.decoder">FrameDecoder</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#retrieveDecoder(javazoom.jl.decoder.Header, javazoom.jl.decoder.Bitstream, int)">retrieveDecoder</A></B>(<A HREF="../../../javazoom/jl/decoder/Header.html" title="class in javazoom.jl.decoder">Header</A>&nbsp;header,
<A HREF="../../../javazoom/jl/decoder/Bitstream.html" title="class in javazoom.jl.decoder">Bitstream</A>&nbsp;stream,
int&nbsp;layer)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#setEqualizer(javazoom.jl.decoder.Equalizer)">setEqualizer</A></B>(<A HREF="../../../javazoom/jl/decoder/Equalizer.html" title="class in javazoom.jl.decoder">Equalizer</A>&nbsp;eq)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Decoder.html#setOutputBuffer(javazoom.jl.decoder.Obuffer)">setOutputBuffer</A></B>(<A HREF="../../../javazoom/jl/decoder/Obuffer.html" title="class in javazoom.jl.decoder">Obuffer</A>&nbsp;out)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Changes the output buffer.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="Decoder()"><!-- --></A><H3>
Decoder</H3>
<PRE>
public <B>Decoder</B>()</PRE>
<DL>
<DD>Creates a new <code>Decoder</code> instance with default
parameters.
<P>
</DL>
<HR>
<A NAME="Decoder(javazoom.jl.decoder.Decoder.Params)"><!-- --></A><H3>
Decoder</H3>
<PRE>
public <B>Decoder</B>(<A HREF="../../../javazoom/jl/decoder/Decoder.Params.html" title="class in javazoom.jl.decoder">Decoder.Params</A>&nbsp;params0)</PRE>
<DL>
<DD>Creates a new <code>Decoder</code> instance with default
parameters.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>params</CODE> - The <code>Params</code> instance that describes
the customizable aspects of the decoder.</DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="getDefaultParams()"><!-- --></A><H3>
getDefaultParams</H3>
<PRE>
public static <A HREF="../../../javazoom/jl/decoder/Decoder.Params.html" title="class in javazoom.jl.decoder">Decoder.Params</A> <B>getDefaultParams</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="setEqualizer(javazoom.jl.decoder.Equalizer)"><!-- --></A><H3>
setEqualizer</H3>
<PRE>
public void <B>setEqualizer</B>(<A HREF="../../../javazoom/jl/decoder/Equalizer.html" title="class in javazoom.jl.decoder">Equalizer</A>&nbsp;eq)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="decodeFrame(javazoom.jl.decoder.Header, javazoom.jl.decoder.Bitstream)"><!-- --></A><H3>
decodeFrame</H3>
<PRE>
public <A HREF="../../../javazoom/jl/decoder/Obuffer.html" title="class in javazoom.jl.decoder">Obuffer</A> <B>decodeFrame</B>(<A HREF="../../../javazoom/jl/decoder/Header.html" title="class in javazoom.jl.decoder">Header</A>&nbsp;header,
<A HREF="../../../javazoom/jl/decoder/Bitstream.html" title="class in javazoom.jl.decoder">Bitstream</A>&nbsp;stream)
throws <A HREF="../../../javazoom/jl/decoder/DecoderException.html" title="class in javazoom.jl.decoder">DecoderException</A></PRE>
<DL>
<DD>Decodes one frame from an MPEG audio bitstream.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>header</CODE> - The header describing the frame to decode.<DD><CODE>bitstream</CODE> - The bistream that provides the bits for te body of the frame.
<DT><B>Returns:</B><DD>A SampleBuffer containing the decoded samples.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../javazoom/jl/decoder/DecoderException.html" title="class in javazoom.jl.decoder">DecoderException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="setOutputBuffer(javazoom.jl.decoder.Obuffer)"><!-- --></A><H3>
setOutputBuffer</H3>
<PRE>
public void <B>setOutputBuffer</B>(<A HREF="../../../javazoom/jl/decoder/Obuffer.html" title="class in javazoom.jl.decoder">Obuffer</A>&nbsp;out)</PRE>
<DL>
<DD>Changes the output buffer. This will take effect the next time
decodeFrame() is called.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getOutputFrequency()"><!-- --></A><H3>
getOutputFrequency</H3>
<PRE>
public int <B>getOutputFrequency</B>()</PRE>
<DL>
<DD>Retrieves the sample frequency of the PCM samples output
by this decoder. This typically corresponds to the sample
rate encoded in the MPEG audio stream.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>the</CODE> - sample rate (in Hz) of the samples written to the
output buffer when decoding.</DL>
</DD>
</DL>
<HR>
<A NAME="getOutputChannels()"><!-- --></A><H3>
getOutputChannels</H3>
<PRE>
public int <B>getOutputChannels</B>()</PRE>
<DL>
<DD>Retrieves the number of channels of PCM samples output by
this decoder. This usually corresponds to the number of
channels in the MPEG audio stream, although it may differ.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The number of output channels in the decoded samples: 1
for mono, or 2 for stereo.</DL>
</DD>
</DL>
<HR>
<A NAME="getOutputBlockSize()"><!-- --></A><H3>
getOutputBlockSize</H3>
<PRE>
public int <B>getOutputBlockSize</B>()</PRE>
<DL>
<DD>Retrieves the maximum number of samples that will be written to
the output buffer when one frame is decoded. This can be used to
help calculate the size of other buffers whose size is based upon
the number of samples written to the output buffer. NB: this is
an upper bound and fewer samples may actually be written, depending
upon the sample rate and number of channels.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The maximum number of samples that are written to the
output buffer when decoding a single frame of MPEG audio.</DL>
</DD>
</DL>
<HR>
<A NAME="newDecoderException(int)"><!-- --></A><H3>
newDecoderException</H3>
<PRE>
protected <A HREF="../../../javazoom/jl/decoder/DecoderException.html" title="class in javazoom.jl.decoder">DecoderException</A> <B>newDecoderException</B>(int&nbsp;errorcode)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="newDecoderException(int, java.lang.Throwable)"><!-- --></A><H3>
newDecoderException</H3>
<PRE>
protected <A HREF="../../../javazoom/jl/decoder/DecoderException.html" title="class in javazoom.jl.decoder">DecoderException</A> <B>newDecoderException</B>(int&nbsp;errorcode,
java.lang.Throwable&nbsp;throwable)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="retrieveDecoder(javazoom.jl.decoder.Header, javazoom.jl.decoder.Bitstream, int)"><!-- --></A><H3>
retrieveDecoder</H3>
<PRE>
protected <A HREF="../../../javazoom/jl/decoder/FrameDecoder.html" title="interface in javazoom.jl.decoder">FrameDecoder</A> <B>retrieveDecoder</B>(<A HREF="../../../javazoom/jl/decoder/Header.html" title="class in javazoom.jl.decoder">Header</A>&nbsp;header,
<A HREF="../../../javazoom/jl/decoder/Bitstream.html" title="class in javazoom.jl.decoder">Bitstream</A>&nbsp;stream,
int&nbsp;layer)
throws <A HREF="../../../javazoom/jl/decoder/DecoderException.html" title="class in javazoom.jl.decoder">DecoderException</A></PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../javazoom/jl/decoder/DecoderException.html" title="class in javazoom.jl.decoder">DecoderException</A></CODE></DL>
</DD>
</DL>
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