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

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Bitstream
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javazoom.jl.decoder</FONT>
<BR>
Class Bitstream</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>javazoom.jl.decoder.Bitstream</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../javazoom/jl/decoder/BitstreamErrors.html" title="interface in javazoom.jl.decoder">BitstreamErrors</A>, <A HREF="../../../javazoom/jl/decoder/JavaLayerErrors.html" title="interface in javazoom.jl.decoder">JavaLayerErrors</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public final class <B>Bitstream</B><DT>extends java.lang.Object<DT>implements <A HREF="../../../javazoom/jl/decoder/BitstreamErrors.html" title="interface in javazoom.jl.decoder">BitstreamErrors</A></DL>
</PRE>
<P>
The <code>Bistream</code> class is responsible for parsing
an MPEG audio bitstream.
<b>REVIEW:</b> much of the parsing currently occurs in the
various decoders. This should be moved into this class and associated
inner classes.
<P>
<P>
<HR>
<P>
<!-- =========== FIELD SUMMARY =========== -->
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&nbsp;<A NAME="fields_inherited_from_class_javazoom.jl.decoder.BitstreamErrors"><!-- --></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/BitstreamErrors.html" title="interface in javazoom.jl.decoder">BitstreamErrors</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../javazoom/jl/decoder/BitstreamErrors.html#BITSTREAM_LAST">BITSTREAM_LAST</A>, <A HREF="../../../javazoom/jl/decoder/BitstreamErrors.html#INVALIDFRAME">INVALIDFRAME</A>, <A HREF="../../../javazoom/jl/decoder/BitstreamErrors.html#STREAM_EOF">STREAM_EOF</A>, <A HREF="../../../javazoom/jl/decoder/BitstreamErrors.html#STREAM_ERROR">STREAM_ERROR</A>, <A HREF="../../../javazoom/jl/decoder/BitstreamErrors.html#UNEXPECTED_EOF">UNEXPECTED_EOF</A>, <A HREF="../../../javazoom/jl/decoder/BitstreamErrors.html#UNKNOWN_ERROR">UNKNOWN_ERROR</A>, <A HREF="../../../javazoom/jl/decoder/BitstreamErrors.html#UNKNOWN_SAMPLE_RATE">UNKNOWN_SAMPLE_RATE</A></CODE></TD>
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&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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</TABLE>
&nbsp;
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>Constructor Summary</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Bitstream.html#Bitstream(java.io.InputStream)">Bitstream</A></B>(java.io.InputStream&nbsp;in)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Construct a IBitstream that reads data from a
given InputStream.</TD>
</TR>
</TABLE>
&nbsp;
<!-- ========== METHOD SUMMARY =========== -->
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Bitstream.html#close()">close</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Close the Bitstream.</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/Bitstream.html#closeFrame()">closeFrame</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Close MP3 frame.</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/Bitstream.html#get_bits(int)">get_bits</A></B>(int&nbsp;number_of_bits)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Read bits from buffer into the lower bits of an unsigned int.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.io.InputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Bitstream.html#getRawID3v2()">getRawID3v2</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return raw ID3v2 frames + header.</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/Bitstream.html#header_pos()">header_pos</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return position of the first audio header.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Bitstream.html#isSyncCurrentPosition(int)">isSyncCurrentPosition</A></B>(int&nbsp;syncmode)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Determines if the next 4 bytes of the stream represent a
frame header.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Bitstream.html#isSyncMark(int, int, int)">isSyncMark</A></B>(int&nbsp;headerstring,
int&nbsp;syncmode,
int&nbsp;word)</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/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Bitstream.html#newBitstreamException(int)">newBitstreamException</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/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Bitstream.html#newBitstreamException(int, java.lang.Throwable)">newBitstreamException</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>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Bitstream.html#readBits(int)">readBits</A></B>(int&nbsp;n)</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/Bitstream.html#readCheckedBits(int)">readCheckedBits</A></B>(int&nbsp;n)</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;<A HREF="../../../javazoom/jl/decoder/Header.html" title="class in javazoom.jl.decoder">Header</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javazoom/jl/decoder/Bitstream.html#readFrame()">readFrame</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Reads and parses the next frame from the input source.</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/Bitstream.html#unreadFrame()">unreadFrame</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unreads the bytes read from the frame.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<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 ======== -->
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<B>Constructor Detail</B></FONT></TH>
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</TABLE>
<A NAME="Bitstream(java.io.InputStream)"><!-- --></A><H3>
Bitstream</H3>
<PRE>
public <B>Bitstream</B>(java.io.InputStream&nbsp;in)</PRE>
<DL>
<DD>Construct a IBitstream that reads data from a
given InputStream.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>in</CODE> - The InputStream to read from.</DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
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</TABLE>
<A NAME="header_pos()"><!-- --></A><H3>
header_pos</H3>
<PRE>
public int <B>header_pos</B>()</PRE>
<DL>
<DD>Return position of the first audio header.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>size of ID3v2 tag frames.</DL>
</DD>
</DL>
<HR>
<A NAME="getRawID3v2()"><!-- --></A><H3>
getRawID3v2</H3>
<PRE>
public java.io.InputStream <B>getRawID3v2</B>()</PRE>
<DL>
<DD>Return raw ID3v2 frames + header.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>ID3v2 InputStream or null if ID3v2 frames are not available.</DL>
</DD>
</DL>
<HR>
<A NAME="close()"><!-- --></A><H3>
close</H3>
<PRE>
public void <B>close</B>()
throws <A HREF="../../../javazoom/jl/decoder/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A></PRE>
<DL>
<DD>Close the Bitstream.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../javazoom/jl/decoder/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="readFrame()"><!-- --></A><H3>
readFrame</H3>
<PRE>
public <A HREF="../../../javazoom/jl/decoder/Header.html" title="class in javazoom.jl.decoder">Header</A> <B>readFrame</B>()
throws <A HREF="../../../javazoom/jl/decoder/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A></PRE>
<DL>
<DD>Reads and parses the next frame from the input source.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the Header describing details of the frame read,
or null if the end of the stream has been reached.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../javazoom/jl/decoder/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="unreadFrame()"><!-- --></A><H3>
unreadFrame</H3>
<PRE>
public void <B>unreadFrame</B>()
throws <A HREF="../../../javazoom/jl/decoder/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A></PRE>
<DL>
<DD>Unreads the bytes read from the frame.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../javazoom/jl/decoder/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="closeFrame()"><!-- --></A><H3>
closeFrame</H3>
<PRE>
public void <B>closeFrame</B>()</PRE>
<DL>
<DD>Close MP3 frame.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="isSyncCurrentPosition(int)"><!-- --></A><H3>
isSyncCurrentPosition</H3>
<PRE>
public boolean <B>isSyncCurrentPosition</B>(int&nbsp;syncmode)
throws <A HREF="../../../javazoom/jl/decoder/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A></PRE>
<DL>
<DD>Determines if the next 4 bytes of the stream represent a
frame header.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../javazoom/jl/decoder/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="readBits(int)"><!-- --></A><H3>
readBits</H3>
<PRE>
public int <B>readBits</B>(int&nbsp;n)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="readCheckedBits(int)"><!-- --></A><H3>
readCheckedBits</H3>
<PRE>
public int <B>readCheckedBits</B>(int&nbsp;n)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="newBitstreamException(int)"><!-- --></A><H3>
newBitstreamException</H3>
<PRE>
protected <A HREF="../../../javazoom/jl/decoder/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A> <B>newBitstreamException</B>(int&nbsp;errorcode)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="newBitstreamException(int, java.lang.Throwable)"><!-- --></A><H3>
newBitstreamException</H3>
<PRE>
protected <A HREF="../../../javazoom/jl/decoder/BitstreamException.html" title="class in javazoom.jl.decoder">BitstreamException</A> <B>newBitstreamException</B>(int&nbsp;errorcode,
java.lang.Throwable&nbsp;throwable)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="isSyncMark(int, int, int)"><!-- --></A><H3>
isSyncMark</H3>
<PRE>
public boolean <B>isSyncMark</B>(int&nbsp;headerstring,
int&nbsp;syncmode,
int&nbsp;word)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="get_bits(int)"><!-- --></A><H3>
get_bits</H3>
<PRE>
public int <B>get_bits</B>(int&nbsp;number_of_bits)</PRE>
<DL>
<DD>Read bits from buffer into the lower bits of an unsigned int.
The LSB contains the latest read bit of the stream.
(1 <= number_of_bits <= 16)
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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