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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
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<TITLE>The MP4-SA Book: Appendix F: Language Rules</TITLE>
<META name="description" content="An index to semantics, syntax,
width, rate, and other types of rules in MP4-SA.">
<META name="keywords" content="MP4-SA">
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<A HREF="../../index.html">mp4-sa</A>-><A HREF="../../index.html">
the mp4-sa book</A>-><A HREF="../index.html">
appendices</A>-><STRONG>language rules</STRONG>
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</TABLE>
<H3>From <A HREF="../../index.html">The MPEG-4 Structured Audio Book</A>
by <A HREF="http://www.cs.berkeley.edu/~lazzaro/index.html">
John Lazzaro</A> and <A HREF="http://www.cs.berkeley.edu/~johnw">
John Wawrzynek.</A></H3>
<H1>Appendix F: Language Rules</H1>
<TABLE WIDTH="100%" CELLPADDING=12 CELLSPACING=0>
<TR>
<TD WIDTH="50%" VALIGN=top BGCOLOR="#CCFFCC">
<H2>Atomic Elements</H2>
<P>
How to form correct <A
HREF="../../saol/vars/index.html#numbers">numbers</A>. How to form
correct <A HREF="../../saol/vars/index.html#names">names</A> for
variables and other elements in SAOL, including
<A HREF="../../opcodes/user/index.html#header">user-defined opcodes</A>.
<H2>Bus Rules</H2>
<P>
How to determine the width of the <A
HREF="../../saol/bus/index.html#output">audio input port</A> and the
<A HREF="../../saol/bus/index.html#send">audio output port</A> of an
instrument. How to determine the <A
HREF="../../saol/bus/index.html#determine">execution order</A> of the
instruments in a SAOL program, and how to use this ordering to
determine the width of <A
HREF="../../saol/bus/index.html#apply">user-defined buses</A>.
<H2>Decoder Execution Order</H2>
<P>
Table <A HREF="../../tut/index.html#trace">introducing</A> the
execution cycle (i-pass, k-pass, and a-pass code synchronized to
decoder k-cycles and a-cycles). How to determine the <A
HREF="../../saol/bus/index.html#determine">execution order</A> of the
instruments in a SAOL program. <A
HREF="../../saol/bus/index.html#apply">Introduction</A> and <A
HREF="../../control/saolc/index.html#order">detailed description</A>
of how this ordering impacts the execution of a SAOL program.
<H2>Opcode Call Semantics</H2>
<P>
The calling semantics for core opcodes are <A
HREF="../../saol/simple/index.html#opcode">introduced</A> early in the
book, and <A
HREF="../../saol/simple/index.html#summary">summarized</A> in a table.
Near the end of the book, we explain the calling semantics for <A
HREF="../../opcodes/user/index.html#calls">user-defined</A> opcodes.
Oparray calling are <A
HREF="../../opcodes/filter/index.html#frac">introduced</A> as part of
the <B>fracdelay</b> core opcode description. The special semantics of
<A HREF="../../opcodes/sproc/index.html#special">specialop</A> opcodes
are introduced during the discussion of the 5 core opcodes that are
<B>specialop</B>.
</TD>
<TD WIDTH="50%" VALIGN=top BGCOLOR="#FFCCCC">
<H2>Opcode Definitions</H2>
<P>
Rules for legal user-defined opcodes that result in useful
computation are divided into rules for declaring useful
<A
HREF="../../opcodes/user/index.html#header">parameters and
variables</A> and rules for <A
HREF="../../opcodes/user/index.html#block">statement blocks</A>.
<H2>Parameter Lists</H2>
<P>
How to form correct parameter lists for <A
HREF="../../saol/vars/index.html#preamble">instruments</A> and <A
HREF="../../opcodes/user/index.html#header">user-defined opcodes</A>.
<H2>Pitch Types</H2>
<P>
A <A HREF="../../saol/simple/index.html#pitch">conversion table</A>
shows the four ways to represent pitch in SAOL.
<H2>Precedence</H2>
<P>
The <A HREF="../../saol/exstat/index.html#logic">precedence</A> table
for SAOL expressions. See also this <A
HREF="../../saol/exstat/index.html#arith">explanation</A> of the
concept of precedence.
<H2>Statement Semantics</H2>
<P>
Rate semantics for <A
HREF="../../saol/exstat/index.html#assign">assignment </A>, <A
HREF="../../saol/exstat/index.html#if">if and if-else</A>, and <A
HREF="../../saol/exstat/index.html#while">while</A> statements, as
well as a <A HREF="../../saol/exstat/index.html#summary">summary
table</A> for these three statements. Rate and width semantics for the
bus and audio <A HREF="../../saol/bus/index.html#output">output</A>,
<A HREF="../../saol/bus/index.html#ancillary">outbus</A>, and <A
HREF="../../saol/bus/index.html#ancillary">spatialize</A> statements.
Rate and width semantics of control-oriented <A
HREF="../../control/saolc/index.html#instr">instr</A>, <A
HREF="../../control/saolc/index.html#extend">extend</A>, and <A
HREF="../../control/saolc/index.html#turnoff">turnoff</A> statements.
The user-defined opcode chapter explains the rate and width semantics
of the
<A
HREF="../../opcodes/user/index.html#block">return</A> statement.
<pre>
</pre>
<B><P>
Appendix G:</B>
</B>
<A HREF="../cor1/index.html">COR 1 SAOL changes</A>
</TD>
</TR>
</TABLE>
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<A HREF="../../../index.html">mp4-sa</A>-><A HREF="../../index.html">
the mp4-sa book</A>-><A HREF="../index.html">
appendices</A>-><STRONG>language rules</STRONG>
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<A HREF="../../../copyright/index.html">Copyright 1999 John Lazzaro and John
Wawrzynek.</A>
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