audioformat.html

JMF原版英文说明文档

<PRE>
public static final java.lang.String <B>MSRT24</B></PRE>
<DL>
</DL>
<HR>

<A NAME="MPEG"><!-- --></A><H3>
MPEG</H3>
<PRE>
public static final java.lang.String <B>MPEG</B></PRE>
<DL>
</DL>
<HR>

<A NAME="MPEG_RTP"><!-- --></A><H3>
MPEG_RTP</H3>
<PRE>
public static final java.lang.String <B>MPEG_RTP</B></PRE>
<DL>
</DL>
<HR>

<A NAME="DOLBYAC3"><!-- --></A><H3>
DOLBYAC3</H3>
<PRE>
public static final java.lang.String <B>DOLBYAC3</B></PRE>
<DL>
</DL>

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<A NAME="AudioFormat(java.lang.String)"><!-- --></A><H3>
AudioFormat</H3>
<PRE>
public <B>AudioFormat</B>(java.lang.String&nbsp;encoding)</PRE>
<DL>
<DD>Constructs an <CODE>AudioFormat</CODE> with the specified encoding type.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>encoding</CODE> - The audio encoding type.</DL>
</DD>
</DL>
<HR>

<A NAME="AudioFormat(java.lang.String, double, int, int)"><!-- --></A><H3>
AudioFormat</H3>
<PRE>
public <B>AudioFormat</B>(java.lang.String&nbsp;encoding,
                   double&nbsp;sampleRate,
                   int&nbsp;sampleSizeInBits,
                   int&nbsp;channels)</PRE>
<DL>
<DD>Constructs an <CODE>AudioFormat</CODE> with the specified attributes.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>encoding</CODE> - A <CODE>String</CODE> that describes the encoding type 
 for this  <CODE>AudioFormat</CODE>.<DD><CODE>sampleRate</CODE> - The sample rate.<DD><CODE>sampleSizeInBits</CODE> - The sample size in bits.<DD><CODE>channels</CODE> - The number of channels as an integer. 
 For example, 1 for mono, 2 for stereo.</DL>
</DD>
</DL>
<HR>

<A NAME="AudioFormat(java.lang.String, double, int, int, int, int)"><!-- --></A><H3>
AudioFormat</H3>
<PRE>
public <B>AudioFormat</B>(java.lang.String&nbsp;encoding,
                   double&nbsp;sampleRate,
                   int&nbsp;sampleSizeInBits,
                   int&nbsp;channels,
                   int&nbsp;endian,
                   int&nbsp;signed)</PRE>
<DL>
<DD>Constructs an <CODE>AudioFormat</CODE>  with the specified attributes.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>encoding</CODE> - A <CODE>String</CODE> that describes the encoding 
 type for this  <CODE>AudioFormat</CODE>.<DD><CODE>sampleRate</CODE> - The sample rate.<DD><CODE>sampleSizeInBits</CODE> - The sample size in bits.<DD><CODE>channels</CODE> - The number of channels.<DD><CODE>endian</CODE> - The sample byte ordering used for this 
 <code>AudioFormat</code>--<CODE>BIG_ENDIAN</CODE> or <CODE>LITTLE_ENDIAN</CODE>.<DD><CODE>signed</CODE> - Indicates whether the samples are stored in a signed or unsigned 
 format. Specify <CITE><CODE>true</CODE></CITE> 
 if the <code>AudioFormat</code> is signed, <CODE>false</CODE> if the 
 <code>AudioFormat</code> is unsigned.</DL>
</DD>
</DL>
<HR>

<A NAME="AudioFormat(java.lang.String, double, int, int, int, int, int, double, java.lang.Class)"><!-- --></A><H3>
AudioFormat</H3>
<PRE>
public <B>AudioFormat</B>(java.lang.String&nbsp;encoding,
                   double&nbsp;sampleRate,
                   int&nbsp;sampleSizeInBits,
                   int&nbsp;channels,
                   int&nbsp;endian,
                   int&nbsp;signed,
                   int&nbsp;frameSizeInBits,
                   double&nbsp;frameRate,
                   java.lang.Class&nbsp;dataType)</PRE>
<DL>
<DD>Constructs an <CODE>AudioFormat</CODE> with the specified attributes.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>encoding</CODE> - A <CODE>String</CODE> that describes the encoding type 
 for this  <CODE>AudioFormat</CODE>.<DD><CODE>sampleRate</CODE> - The sample rate.<DD><CODE>sampleSizeInBits</CODE> - The sample size.<DD><CODE>channels</CODE> - The number of channels.<DD><CODE>endian</CODE> - The sample byte ordering used for this 
 <code>AudioFormat</code>--<CODE>BIG_ENDIAN</CODE> or <CODE>LITTLE_ENDIAN</CODE>.<DD><CODE>signed</CODE> - Indicates whether the samples are stored in a signed or unsigned 
 format. Specify <CITE><CODE>true</CODE></CITE> 
 if the <code>AudioFormat</code> is signed, <CODE>false</CODE> if the 
 <code>AudioFormat</code> is unsigned.<DD><CODE>frameSizeInBits</CODE> - The frame size.<DD><CODE>frameRate</CODE> - The frame rate.<DD><CODE>dataType</CODE> - The type of the data. For example, byte array.</DL>
</DD>
</DL>

<!-- ============ METHOD DETAIL ========== -->

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<B>Method Detail</B></FONT></TD>
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</TABLE>

<A NAME="getSampleRate()"><!-- --></A><H3>
getSampleRate</H3>
<PRE>
public double <B>getSampleRate</B>()</PRE>
<DL>
<DD>Gets the audio sample rate.<DD><DL>
<DT><B>Returns:</B><DD>The sample rate.</DL>
</DD>
</DL>
<HR>

<A NAME="getSampleSizeInBits()"><!-- --></A><H3>
getSampleSizeInBits</H3>
<PRE>
public int <B>getSampleSizeInBits</B>()</PRE>
<DL>
<DD>Gets the size of a sample.<DD><DL>
<DT><B>Returns:</B><DD>The sample size in bits.</DL>
</DD>
</DL>
<HR>

<A NAME="getChannels()"><!-- --></A><H3>
getChannels</H3>
<PRE>
public int <B>getChannels</B>()</PRE>
<DL>
<DD>Gets the number of channels.<DD><DL>
<DT><B>Returns:</B><DD>The number of channels as an integer.</DL>
</DD>
</DL>
<HR>

<A NAME="getEndian()"><!-- --></A><H3>
getEndian</H3>
<PRE>
public int <B>getEndian</B>()</PRE>
<DL>
<DD>Gets an integer that indicates whether the sample byte order is big endian 
 or little endian.<DD><DL>
<DT><B>Returns:</B><DD>The sample byte order of this <code>AudioFormat</code>, 
 <CODE>BIG_ENDIAN</CODE> or <CODE>LITTLE_ENDIAN</CODE>.</DL>
</DD>
</DL>
<HR>

<A NAME="getSigned()"><!-- --></A><H3>
getSigned</H3>
<PRE>
public int <B>getSigned</B>()</PRE>
<DL>
<DD>Gets a boolean that indicates whether the samples are stored in signed format
 or an unsigned format.<DD><DL>
<DT><B>Returns:</B><DD><CODE>SIGNED</CODE> if this <CODE>VideoFormat</CODE>  is signed, 
 <CODE>UNSIGNED</CODE> if it is not.</DL>
</DD>
</DL>
<HR>

<A NAME="getFrameSizeInBits()"><!-- --></A><H3>
getFrameSizeInBits</H3>
<PRE>
public int <B>getFrameSizeInBits</B>()</PRE>
<DL>
<DD>Gets the frame size of this <code>AudioFormat</code>. This method is 
 used primarily  for compressed audio.<DD><DL>
<DT><B>Returns:</B><DD>The frame size of this <code>AudioFormat</code> in bits.</DL>
</DD>
</DL>
<HR>

<A NAME="getFrameRate()"><!-- --></A><H3>
getFrameRate</H3>
<PRE>
public double <B>getFrameRate</B>()</PRE>
<DL>
<DD>Gets the frame rate of this <code>AudioFormat</code>.<DD><DL>
<DT><B>Returns:</B><DD>The frame rate.</DL>
</DD>
</DL>
<HR>

<A NAME="computeDuration(long)"><!-- --></A><H3>
computeDuration</H3>
<PRE>
public long <B>computeDuration</B>(long&nbsp;length)</PRE>
<DL>
<DD>Returns the duration of the media based on the given length 
 of the data.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>length</CODE> - length of the data in this format.<DT><B>Returns:</B><DD>the duration in nanoseconds computed from the length of 
 the data in this format.  Returns -1 if the duration cannot be
 computed.</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>()</PRE>
<DL>
<DD>Gets a <CODE>String</CODE> representation of the attributes of this 
 <code>AudioFormat</code>. For example: "PCM, 44.1 KHz, Stereo, Signed".<DD><DL>
<DT><B>Overrides:</B><DD><A HREF="../../../javax/media/Format.html#toString()">toString</A> in class <A HREF="../../../javax/media/Format.html">Format</A></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>A <CODE>String</CODE> that describes the <code>AudioFormat</code> 
 attributes.</DL>
</DD>
</DL>
<HR>

<A NAME="equals(java.lang.Object)"><!-- --></A><H3>
equals</H3>
<PRE>
public boolean <B>equals</B>(java.lang.Object&nbsp;format)</PRE>
<DL>
<DD>Compares the specified <CODE>Format</CODE> with this <code>AudioFormat</code>. 
 Returns <CODE>true</CODE> 
 only if the specified <CODE>Format</CODE> is an <CODE>AudioFormat</CODE> and 
 all of its attributes are
 identical to this <code>AudioFormat</code>.<DD><DL>
<DT><B>Overrides:</B><DD><A HREF="../../../javax/media/Format.html#equals(java.lang.Object)">equals</A> in class <A HREF="../../../javax/media/Format.html">Format</A></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>format</CODE> - The <CODE>Format</CODE> to compare with this one.<DT><B>Returns:</B><DD><CODE>true</CODE> if the specified <CODE>Format</CODE> is the same, 
 <CODE>false</CODE> if it is not.</DL>
</DD>
</DL>
<HR>

<A NAME="matches(javax.media.Format)"><!-- --></A><H3>
matches</H3>
<PRE>
public boolean <B>matches</B>(<A HREF="../../../javax/media/Format.html">Format</A>&nbsp;format)</PRE>
<DL>
<DD>Checks whether or not the specified <CODE>Format</CODE> <EM>matches</EM> 
 this <CODE>AudioFormat</CODE>.
 Matches only compares the attributes that are defined in the specified 
 <CODE>Format</CODE>,  unspecified attributes are ignored.
 <p>
 The two <CODE>Format</CODE> objects do not have to be of the same class to 
 match.  For example, if "A" are "B" are being compared, a
 match is possible if "A" is derived from "B"
 or "B" is derived from "A". (The compared attributes must still match, or 
 <CODE>matches</CODE> fails.)<DD><DL>
<DT><B>Overrides:</B><DD><A HREF="../../../javax/media/Format.html#matches(javax.media.Format)">matches</A> in class <A HREF="../../../javax/media/Format.html">Format</A></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>format</CODE> - The <CODE>Format</CODE> to compare with this one.<DT><B>Returns:</B><DD><CODE>true</CODE> if the specified <CODE>Format</CODE> matches this one, 
 <CODE>false</CODE> if it does not.</DL>
</DD>
</DL>
<HR>

<A NAME="intersects(javax.media.Format)"><!-- --></A><H3>
intersects</H3>
<PRE>
public <A HREF="../../../javax/media/Format.html">Format</A> <B>intersects</B>(<A HREF="../../../javax/media/Format.html">Format</A>&nbsp;format)</PRE>
<DL>
<DD>Finds the attributes shared by two matching <CODE>Format</CODE> objects.
 If the specified <CODE>Format</CODE> does not match this one, the result is
 undefined.<DD><DL>
<DT><B>Overrides:</B><DD><A HREF="../../../javax/media/Format.html#intersects(javax.media.Format)">intersects</A> in class <A HREF="../../../javax/media/Format.html">Format</A></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>The</CODE> - matching <CODE>Format</CODE> to intersect with this 
 <CODE>AudioFormat</CODE>.<DT><B>Returns:</B><DD>A <CODE>Format</CODE> object
 with its attributes set to those attributes common to both 
 <CODE>Format</CODE> objects.<DT><B>See Also: </B><DD><A HREF="../../../javax/media/format/AudioFormat.html#matches(javax.media.Format)"><CODE>matches(javax.media.Format)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="clone()"><!-- --></A><H3>
clone</H3>
<PRE>
public java.lang.Object <B>clone</B>()</PRE>
<DL>
<DD>Creates a clone of this <code>AudioFormat</code> by copying each 
 field to the clone.<DD><DL>
<DT><B>Overrides:</B><DD><A HREF="../../../javax/media/Format.html#clone()">clone</A> in class <A HREF="../../../javax/media/Format.html">Format</A></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>A clone of this <code>AudioFormat</code>.</DL>
</DD>
</DL>
<HR>

<A NAME="copy(javax.media.Format)"><!-- --></A><H3>
copy</H3>
<PRE>
protected void <B>copy</B>(<A HREF="../../../javax/media/Format.html">Format</A>&nbsp;f)</PRE>
<DL>
<DD>Copies the attributes from the specified 
 <CODE>Format</CODE> into this <CODE>AudioFormat</CODE>.<DD><DL>
<DT><B>Overrides:</B><DD><A HREF="../../../javax/media/Format.html#copy(javax.media.Format)">copy</A> in class <A HREF="../../../javax/media/Format.html">Format</A></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>f</CODE> - The <CODE>Format</CODE> to copy the attributes from.</DL>
</DD>
</DL>
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