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r1585 | casper | 2005-07-09 23:26:15 +0200 (Sat, 09 Jul 2005) | 3 lines

Last checkin before version 0.2





git-svn-id: svn://svn.code.sf.net/p/pyalsaaudio/code/trunk@12 ec2f30ec-7544-0410-870e-f70ca00c83f0
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larsimmisch
2008-01-24 12:22:41 +00:00
parent 470d6140df
commit 8fa9d27a88
24 changed files with 1192 additions and 820 deletions
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doc/about.html
+51 -47
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@@ -1,44 +1,45 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css'>
<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio'>
<link rel='contents' href='contents.html' title="Contents">
<link rel='last' href='about.html' title='About this document...'>
<link rel='help' href='about.html' title='About this document...'>
<LINK REL="prev" href="contents.html">
<LINK REL="parent" HREF="pyalsaaudio.html">
<meta name='aesop' content='information'>
<META NAME="description" CONTENT="About this document ...">
<META NAME="keywords" CONTENT="pyalsaaudio">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css' />
<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio' />
<link rel='contents' href='contents.html' title="Contents" />
<link rel='last' href='about.html' title='About this document...' />
<link rel='help' href='about.html' title='About this document...' />
<link rel="prev" href="contents.html" />
<link rel="parent" href="pyalsaaudio.html" />
<meta name='aesop' content='information' />
<title>About this document ...</title>
</head>
<body>
<DIV CLASS="navigation">
<div id='top-navigation-panel' xml:id='top-navigation-panel'>
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td><a rel="prev" title="4.4 ALSA Examples"
href="pcm-example.html"><img src='previous.gif'
border='0' height='32' alt='Previous Page' width='32'></A></td>
<td><a rel="parent" title="PyAlsaAudio"
HREF="pyalsaaudio.html"><img src='up.gif'
border='0' height='32' alt='Up One Level' width='32'></A></td>
<td><img src='blank.gif'
border='0' height='32' alt='' width='32'></td>
<td class='online-navigation'><a rel="prev" title="4.4 ALSA Examples"
href="pcm-example.html"><img src='previous.png'
border='0' height='32' alt='Previous Page' width='32' /></A></td>
<td class='online-navigation'><a rel="parent" title="PyAlsaAudio"
href="pyalsaaudio.html"><img src='up.png'
border='0' height='32' alt='Up One Level' width='32' /></A></td>
<td class='online-navigation'><img src='next.png'
border='0' height='32' alt='Next Page' width='32' /></td>
<td align="center" width="100%">PyAlsaAudio</td>
<td><a rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.gif'
border='0' height='32' alt='Contents' width='32'></A></td>
<td><img src='blank.gif'
border='0' height='32' alt='' width='32'></td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.png'
border='0' height='32' alt='Contents' width='32' /></A></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="pcm-example.html">4.4 ALSA Examples</A>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" HREF="pyalsaaudio.html">PyAlsaAudio</A>
<br><hr>
<a class="sectref" rel="parent" href="pyalsaaudio.html">PyAlsaAudio</A>
</div>
<hr /></div>
</DIV>
<!--End of Navigation Panel-->
@@ -72,33 +73,36 @@ About this document ...</A>
</p>
<DIV CLASS="navigation">
<p><hr>
<div class='online-navigation'>
<p></p><hr />
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td><a rel="prev" title="4.4 ALSA Examples"
rel="prev" title="4.4 ALSA Examples"
href="pcm-example.html"><img src='previous.gif'
border='0' height='32' alt='Previous Page' width='32'></A></td>
<td><a rel="parent" title="PyAlsaAudio"
rel="parent" title="PyAlsaAudio"
HREF="pyalsaaudio.html"><img src='up.gif'
border='0' height='32' alt='Up One Level' width='32'></A></td>
<td><img src='blank.gif'
border='0' height='32' alt='' width='32'></td>
<td class='online-navigation'><a rel="prev" title="4.4 ALSA Examples"
href="pcm-example.html"><img src='previous.png'
border='0' height='32' alt='Previous Page' width='32' /></A></td>
<td class='online-navigation'><a rel="parent" title="PyAlsaAudio"
href="pyalsaaudio.html"><img src='up.png'
border='0' height='32' alt='Up One Level' width='32' /></A></td>
<td class='online-navigation'><img src='next.png'
border='0' height='32' alt='Next Page' width='32' /></td>
<td align="center" width="100%">PyAlsaAudio</td>
<td><a rel="contents" title="Table of Contents"
rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.gif'
border='0' height='32' alt='Contents' width='32'></A></td>
<td><img src='blank.gif'
border='0' height='32' alt='' width='32'></td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.png'
border='0' height='32' alt='Contents' width='32' /></A></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="pcm-example.html">4.4 ALSA Examples</A>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" HREF="pyalsaaudio.html">PyAlsaAudio</A>
<hr>
<span class="release-info">Release 0.1.</span>
<a class="sectref" rel="parent" href="pyalsaaudio.html">PyAlsaAudio</A>
</div>
</div>
<hr />
<span class="release-info">Release 0.2.</span>
</DIV>
<!--End of Navigation Panel-->
doc/contents.html
+57 -50
View File
@@ -1,52 +1,54 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css'>
<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio'>
<link rel='contents' href='contents.html' title="Contents">
<link rel='last' href='about.html' title='About this document...'>
<link rel='help' href='about.html' title='About this document...'>
<LINK REL="next" href="about.html">
<LINK REL="prev" href="front.html">
<LINK REL="parent" HREF="pyalsaaudio.html">
<LINK REL="next" HREF="node3.html">
<meta name='aesop' content='information'>
<META NAME="description" CONTENT="Contents">
<META NAME="keywords" CONTENT="pyalsaaudio">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css' />
<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio' />
<link rel='contents' href='contents.html' title="Contents" />
<link rel='last' href='about.html' title='About this document...' />
<link rel='help' href='about.html' title='About this document...' />
<link rel="next" href="about.html" />
<link rel="prev" href="front.html" />
<link rel="parent" href="pyalsaaudio.html" />
<link rel="next" href="node3.html" />
<meta name='aesop' content='information' />
<title>Contents</title>
</head>
<body>
<DIV CLASS="navigation">
<div id='top-navigation-panel' xml:id='top-navigation-panel'>
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td><a rel="prev" title="Front Matter"
href="front.html"><img src='previous.gif'
border='0' height='32' alt='Previous Page' width='32'></A></td>
<td><a rel="parent" title="PyAlsaAudio"
HREF="pyalsaaudio.html"><img src='up.gif'
border='0' height='32' alt='Up One Level' width='32'></A></td>
<td><a rel="next" title="1 What is ALSA"
HREF="node3.html"><img src='next.gif'
border='0' height='32' alt='Next Page' width='32'></A></td>
<td class='online-navigation'><a rel="prev" title="Front Matter"
href="front.html"><img src='previous.png'
border='0' height='32' alt='Previous Page' width='32' /></A></td>
<td class='online-navigation'><a rel="parent" title="PyAlsaAudio"
href="pyalsaaudio.html"><img src='up.png'
border='0' height='32' alt='Up One Level' width='32' /></A></td>
<td class='online-navigation'><a rel="next" title="1 What is ALSA"
href="node3.html"><img src='next.png'
border='0' height='32' alt='Next Page' width='32' /></A></td>
<td align="center" width="100%">PyAlsaAudio</td>
<td><img src='blank.gif'
border='0' height='32' alt='' width='32'></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="front.html">Front Matter</A>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" HREF="pyalsaaudio.html">PyAlsaAudio</A>
<a class="sectref" rel="parent" href="pyalsaaudio.html">PyAlsaAudio</A>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" HREF="node3.html">1 What is ALSA</A>
<br><hr>
<a class="sectref" rel="next" href="node3.html">1 What is ALSA</A>
</div>
<hr /></div>
</DIV>
<!--End of Navigation Panel-->
<BR>
<BR><H2><A NAME="SECTION002000000000000000000">
<BR><h2><A NAME="SECTION002000000000000000000">
Contents</A>
</H2>
</h2>
<!--Table of Contents-->
<UL CLASS="TofC">
@@ -65,33 +67,38 @@ Contents</A>
<P>
<DIV CLASS="navigation">
<p><hr>
<div class='online-navigation'>
<p></p><hr />
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td><a rel="prev" title="Front Matter"
rel="prev" title="Front Matter"
href="front.html"><img src='previous.gif'
border='0' height='32' alt='Previous Page' width='32'></A></td>
<td><a rel="parent" title="PyAlsaAudio"
rel="parent" title="PyAlsaAudio"
HREF="pyalsaaudio.html"><img src='up.gif'
border='0' height='32' alt='Up One Level' width='32'></A></td>
<td><a rel="next" title="1 What is ALSA"
rel="next" title="1 What is ALSA"
HREF="node3.html"><img src='next.gif'
border='0' height='32' alt='Next Page' width='32'></A></td>
<td class='online-navigation'><a rel="prev" title="Front Matter"
href="front.html"><img src='previous.png'
border='0' height='32' alt='Previous Page' width='32' /></A></td>
<td class='online-navigation'><a rel="parent" title="PyAlsaAudio"
href="pyalsaaudio.html"><img src='up.png'
border='0' height='32' alt='Up One Level' width='32' /></A></td>
<td class='online-navigation'><a rel="next" title="1 What is ALSA"
href="node3.html"><img src='next.png'
border='0' height='32' alt='Next Page' width='32' /></A></td>
<td align="center" width="100%">PyAlsaAudio</td>
<td><img src='blank.gif'
border='0' height='32' alt='' width='32'></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="front.html">Front Matter</A>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" HREF="pyalsaaudio.html">PyAlsaAudio</A>
<a class="sectref" rel="parent" href="pyalsaaudio.html">PyAlsaAudio</A>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" HREF="node3.html">1 What is ALSA</A>
<hr>
<span class="release-info">Release 0.1.</span>
<a class="sectref" rel="next" href="node3.html">1 What is ALSA</A>
</div>
</div>
<hr />
<span class="release-info">Release 0.2.</span>
</DIV>
<!--End of Navigation Panel-->
doc/front.html
+58 -55
View File
@@ -1,53 +1,54 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css'>
<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio'>
<link rel='contents' href='contents.html' title="Contents">
<link rel='last' href='about.html' title='About this document...'>
<link rel='help' href='about.html' title='About this document...'>
<LINK REL="next" href="contents.html">
<LINK REL="prev" HREF="pyalsaaudio.html">
<LINK REL="parent" HREF="pyalsaaudio.html">
<LINK REL="next" href="contents.html">
<meta name='aesop' content='information'>
<META NAME="description" CONTENT="Front Matter">
<META NAME="keywords" CONTENT="pyalsaaudio">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css' />
<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio' />
<link rel='contents' href='contents.html' title="Contents" />
<link rel='last' href='about.html' title='About this document...' />
<link rel='help' href='about.html' title='About this document...' />
<link rel="next" href="contents.html" />
<link rel="prev" href="pyalsaaudio.html" />
<link rel="parent" href="pyalsaaudio.html" />
<link rel="next" href="contents.html" />
<meta name='aesop' content='information' />
<title>Front Matter</title>
</head>
<body>
<DIV CLASS="navigation">
<div id='top-navigation-panel' xml:id='top-navigation-panel'>
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td><a rel="prev" title="PyAlsaAudio"
HREF="pyalsaaudio.html"><img src='previous.gif'
border='0' height='32' alt='Previous Page' width='32'></A></td>
<td><a rel="parent" title="PyAlsaAudio"
HREF="pyalsaaudio.html"><img src='up.gif'
border='0' height='32' alt='Up One Level' width='32'></A></td>
<td><a rel="next" title="Contents"
href="contents.html"><img src='next.gif'
border='0' height='32' alt='Next Page' width='32'></A></td>
<td class='online-navigation'><a rel="prev" title="PyAlsaAudio"
href="pyalsaaudio.html"><img src='previous.png'
border='0' height='32' alt='Previous Page' width='32' /></A></td>
<td class='online-navigation'><a rel="parent" title="PyAlsaAudio"
href="pyalsaaudio.html"><img src='up.png'
border='0' height='32' alt='Up One Level' width='32' /></A></td>
<td class='online-navigation'><a rel="next" title="Contents"
href="contents.html"><img src='next.png'
border='0' height='32' alt='Next Page' width='32' /></A></td>
<td align="center" width="100%">PyAlsaAudio</td>
<td><a rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.gif'
border='0' height='32' alt='Contents' width='32'></A></td>
<td><img src='blank.gif'
border='0' height='32' alt='' width='32'></td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.png'
border='0' height='32' alt='Contents' width='32' /></A></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" HREF="pyalsaaudio.html">PyAlsaAudio</A>
<a class="sectref" rel="prev" href="pyalsaaudio.html">PyAlsaAudio</A>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" HREF="pyalsaaudio.html">PyAlsaAudio</A>
<a class="sectref" rel="parent" href="pyalsaaudio.html">PyAlsaAudio</A>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" href="contents.html">Contents</A>
<br><hr>
</div>
<hr /></div>
</DIV>
<!--End of Navigation Panel-->
<H1><A NAME="SECTION001000000000000000000">&nbsp;</A>
<H1><A NAME="SECTION001000000000000000000"></A><A NAME="front"></A>
<BR>
Front Matter
</H1>
@@ -78,37 +79,39 @@ me.
<P>
<DIV CLASS="navigation">
<p><hr>
<div class='online-navigation'>
<p></p><hr />
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td><a rel="prev" title="PyAlsaAudio"
rel="prev" title="PyAlsaAudio"
HREF="pyalsaaudio.html"><img src='previous.gif'
border='0' height='32' alt='Previous Page' width='32'></A></td>
<td><a rel="parent" title="PyAlsaAudio"
rel="parent" title="PyAlsaAudio"
HREF="pyalsaaudio.html"><img src='up.gif'
border='0' height='32' alt='Up One Level' width='32'></A></td>
<td><a rel="next" title="Contents"
rel="next" title="Contents"
href="contents.html"><img src='next.gif'
border='0' height='32' alt='Next Page' width='32'></A></td>
<td class='online-navigation'><a rel="prev" title="PyAlsaAudio"
href="pyalsaaudio.html"><img src='previous.png'
border='0' height='32' alt='Previous Page' width='32' /></A></td>
<td class='online-navigation'><a rel="parent" title="PyAlsaAudio"
href="pyalsaaudio.html"><img src='up.png'
border='0' height='32' alt='Up One Level' width='32' /></A></td>
<td class='online-navigation'><a rel="next" title="Contents"
href="contents.html"><img src='next.png'
border='0' height='32' alt='Next Page' width='32' /></A></td>
<td align="center" width="100%">PyAlsaAudio</td>
<td><a rel="contents" title="Table of Contents"
rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.gif'
border='0' height='32' alt='Contents' width='32'></A></td>
<td><img src='blank.gif'
border='0' height='32' alt='' width='32'></td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.png'
border='0' height='32' alt='Contents' width='32' /></A></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" HREF="pyalsaaudio.html">PyAlsaAudio</A>
<a class="sectref" rel="prev" href="pyalsaaudio.html">PyAlsaAudio</A>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" HREF="pyalsaaudio.html">PyAlsaAudio</A>
<a class="sectref" rel="parent" href="pyalsaaudio.html">PyAlsaAudio</A>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" href="contents.html">Contents</A>
<hr>
<span class="release-info">Release 0.1.</span>
</div>
</div>
<hr />
<span class="release-info">Release 0.2.</span>
</DIV>
<!--End of Navigation Panel-->
doc/index.html
+52 -45
View File
@@ -1,55 +1,57 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css'>
<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio'>
<link rel='contents' href='contents.html' title="Contents">
<link rel='last' href='about.html' title='About this document...'>
<link rel='help' href='about.html' title='About this document...'>
<LINK REL="next" href="front.html">
<meta name='aesop' content='information'>
<META NAME="description" CONTENT="PyAlsaAudio">
<META NAME="keywords" CONTENT="pyalsaaudio">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css' />
<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio' />
<link rel='contents' href='contents.html' title="Contents" />
<link rel='last' href='about.html' title='About this document...' />
<link rel='help' href='about.html' title='About this document...' />
<link rel="next" href="front.html" />
<meta name='aesop' content='information' />
<title>PyAlsaAudio</title>
</head>
<body>
<DIV CLASS="navigation">
<div id='top-navigation-panel' xml:id='top-navigation-panel'>
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td><img src='blank.gif'
border='0' height='32' alt='' width='32'></td>
<td><img src='blank.gif'
border='0' height='32' alt='' width='32'></td>
<td><a rel="next" title="Front Matter"
href="front.html"><img src='next.gif'
border='0' height='32' alt='Next Page' width='32'></A></td>
<td class='online-navigation'><img src='previous.png'
border='0' height='32' alt='Previous Page' width='32' /></td>
<td class='online-navigation'><img src='up.png'
border='0' height='32' alt='Up One Level' width='32' /></td>
<td class='online-navigation'><a rel="next" title="Front Matter"
href="front.html"><img src='next.png'
border='0' height='32' alt='Next Page' width='32' /></A></td>
<td align="center" width="100%">PyAlsaAudio</td>
<td><a rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.gif'
border='0' height='32' alt='Contents' width='32'></A></td>
<td><img src='blank.gif'
border='0' height='32' alt='' width='32'></td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.png'
border='0' height='32' alt='Contents' width='32' /></A></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
</tr></table>
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<b class="navlabel">Next:</b>
<a class="sectref" rel="next" href="front.html">Front Matter</A>
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<h1>PyAlsaAudio</h1>
<p><b><font size="+2">Casper Wilstrup</font></b></p>
<p>cwi@unispeed.com</p>
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<H2><A NAME="SECTION002430000000000000000">&nbsp;</A>
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<A NAME="mixer-objects"></A>
<BR>
4.3 Mixer Objects
</H2>
@@ -57,8 +59,8 @@ Mixer objects provides access to the ALSA mixer API.
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><span class="typelabel">class</span>&nbsp;<a name="l2h-16"><tt class="class">Mixer</tt></a></b>(</nobr></td>
<td><big>[</big><var>control</var><big>]</big><var>, </var><big>[</big><var>id</var><big>]</big><var>, </var><big>[</big><var>cardname</var><big>]</big>)</td></tr></table>
<td><nobr><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-16' xml:id='l2h-16' class="class">Mixer</tt></b>(</nobr></td>
<td><var></var><big>[</big><var>control</var><big>]</big><var>, </var><big>[</big><var>id</var><big>]</big><var>, </var><big>[</big><var>cardname</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
<var>control</var> - specifies which control to manipulate using this mixer object. The list
of available controls can be found with the <tt class="module">alsaaudio</tt>.<tt class="function">mixers</tt> function.
@@ -77,16 +79,16 @@ Mixer objects have the following methods:
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-17"><tt class="method">cardname</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-17' xml:id='l2h-17' class="method">cardname</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Return the name of the sound card used by this Mixer object
</dl>
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-18"><tt class="method">mixer</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-18' xml:id='l2h-18' class="method">mixer</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Return the name of the specific mixer controlled by this object, For example 'Master'
or 'PCM'
@@ -94,44 +96,44 @@ or 'PCM'
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-19"><tt class="method">mixerid</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-19' xml:id='l2h-19' class="method">mixerid</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Return the ID of the ALSA mixer controlled by this object.
</dl>
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-20"><tt class="method">switchcap</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-20' xml:id='l2h-20' class="method">switchcap</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Returns a list of the switches which are defined by this specific mixer. Possible values in
this list are:
<P>
<table border align="center" style="border-collapse: collapse">
<div class="center"><table class="realtable">
<thead>
<tr class="tableheader">
<th align="left"><b>Switch</b>&nbsp;</th>
<th align="left"><b>Description</b>&nbsp;</th>
<tr>
<th class="left" >Switch</th>
<th class="left" >Description</th>
</tr>
</thead>
<tbody valign="baseline">
<tr><td align="left" valign="baseline"><Volume Capabilities>'Mute'</Volume></td>
<td align="left">This mixer can be muted</td>
<tr><td align="left" valign="baseline"><Volume Capabilities>'Joined Mute'</Volume></td>
<td align="left">This mixer can mute all channels at the same time</td>
<tr><td align="left" valign="baseline"><Volume Capabilities>'Playback Mute'</Volume></td>
<td align="left">This mixer can mute the playback output</td>
<tr><td align="left" valign="baseline"><Volume Capabilities>'Joined Playback Mute'</Volume></td>
<td align="left">Mute playback for all channels at the same time</td>
<tr><td align="left" valign="baseline"><Volume Capabilities>'Capture Mute'</Volume></td>
<td align="left">Mute sound capture</td>
<tr><td align="left" valign="baseline"><Volume Capabilities>'Joined Capture Mute'</Volume></td>
<td align="left">Mute sound capture for all channels at a time</td>
<tr><td align="left" valign="baseline"><Volume Capabilities>'Capture Exclusive'</Volume></td>
<td align="left">Not quite sure what this is</td></tbody>
</table>
<tbody>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Mute'</Volume></td>
<td class="left" >This mixer can be muted</td></tr>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Joined Mute'</Volume></td>
<td class="left" >This mixer can mute all channels at the same time</td></tr>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Playback Mute'</Volume></td>
<td class="left" >This mixer can mute the playback output</td></tr>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Joined Playback Mute'</Volume></td>
<td class="left" >Mute playback for all channels at the same time</td></tr>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Capture Mute'</Volume></td>
<td class="left" >Mute sound capture</td></tr>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Joined Capture Mute'</Volume></td>
<td class="left" >Mute sound capture for all channels at a time</td></tr>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Capture Exclusive'</Volume></td>
<td class="left" >Not quite sure what this is</td></tr></tbody>
</table></div>
<P>
To manipulate these swithes use the <tt class="method">setrec</tt> or <tt class="method">setmute</tt> methods
@@ -139,42 +141,42 @@ To manipulate these swithes use the <tt class="method">setrec</tt> or <tt class=
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-21"><tt class="method">volumecap</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-21' xml:id='l2h-21' class="method">volumecap</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Returns a list of the volume control capabilities of this mixer. Possible values in
the list are:
<P>
<table border align="center" style="border-collapse: collapse">
<div class="center"><table class="realtable">
<thead>
<tr class="tableheader">
<th align="left"><b>Capability</b>&nbsp;</th>
<th align="left"><b>Description</b>&nbsp;</th>
<tr>
<th class="left" >Capability</th>
<th class="left" >Description</th>
</tr>
</thead>
<tbody valign="baseline">
<tr><td align="left" valign="baseline"><Volume Capabilities>'Volume'</Volume></td>
<td align="left">This mixer can control volume</td>
<tr><td align="left" valign="baseline"><Volume Capabilities>'Joined Volume'</Volume></td>
<td align="left">This mixer can control volume for all channels at the same time</td>
<tr><td align="left" valign="baseline"><Volume Capabilities>'Playback Volume'</Volume></td>
<td align="left">This mixer can manipulate the playback volume</td>
<tr><td align="left" valign="baseline"><Volume Capabilities>'Joined Playback Volume'</Volume></td>
<td align="left">Manipulate playback volumne for all channels at the same time</td>
<tr><td align="left" valign="baseline"><Volume Capabilities>'Capture Volume'</Volume></td>
<td align="left">Manipulate sound capture volume</td>
<tr><td align="left" valign="baseline"><Volume Capabilities>'Joined Capture Volume'</Volume></td>
<td align="left">Manipulate sound capture volume for all channels at a time</td></tbody>
</table>
<tbody>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Volume'</Volume></td>
<td class="left" >This mixer can control volume</td></tr>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Joined Volume'</Volume></td>
<td class="left" >This mixer can control volume for all channels at the same time</td></tr>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Playback Volume'</Volume></td>
<td class="left" >This mixer can manipulate the playback volume</td></tr>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Joined Playback Volume'</Volume></td>
<td class="left" >Manipulate playback volumne for all channels at the same time</td></tr>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Capture Volume'</Volume></td>
<td class="left" >Manipulate sound capture volume</td></tr>
<tr><td class="left" valign="baseline"><Volume Capabilities>'Joined Capture Volume'</Volume></td>
<td class="left" >Manipulate sound capture volume for all channels at a time</td></tr></tbody>
</table></div>
<P>
</dl>
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-22"><tt class="method">getvolume</tt></a></b>(</nobr></td>
<td><big>[</big><var>direction</var><big>]</big>)</td></tr></table>
<td><nobr><b><tt id='l2h-22' xml:id='l2h-22' class="method">getvolume</tt></b>(</nobr></td>
<td><var></var><big>[</big><var>direction</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
Returns a list with the current volume settings for each channel. The list elements
are integer percentages.
@@ -189,8 +191,8 @@ if the mixer has this capability, otherwise 'capture'
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-23"><tt class="method">getmute</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-23' xml:id='l2h-23' class="method">getmute</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Return a list indicating the current mute setting for each channel. 0 means not muted, 1 means muted.
@@ -200,8 +202,8 @@ This method will fail if the mixer has no playback switch capabilities.
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-24"><tt class="method">getrec</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-24' xml:id='l2h-24' class="method">getrec</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Return a list indicating the current record mute setting for each channel. 0 means not recording, 1
means not recording.
@@ -212,8 +214,8 @@ This method will fail if the mixer has no capture switch capabilities.
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-25"><tt class="method">setvolume</tt></a></b>(</nobr></td>
<td><var>volume,</var><big>[</big><var>channel</var><big>]</big><var>,</var><big>[</big><var>direction</var><big>]</big>)</td></tr></table>
<td><nobr><b><tt id='l2h-25' xml:id='l2h-25' class="method">setvolume</tt></b>(</nobr></td>
<td><var>volume,</var><big>[</big><var>channel</var><big>]</big><var>,</var><big>[</big><var>direction</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
Change the current volume settings for this mixer. The <var>volume</var> argument controls
the new volume setting as an integer percentage.
@@ -230,8 +232,8 @@ if changed. The default is 'playback' if the mixer has this capability, otherwis
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-26"><tt class="method">setmute</tt></a></b>(</nobr></td>
<td><var>mute, </var><big>[</big><var>channel</var><big>]</big>)</td></tr></table>
<td><nobr><b><tt id='l2h-26' xml:id='l2h-26' class="method">setmute</tt></b>(</nobr></td>
<td><var>mute, </var><big>[</big><var>channel</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
Sets the mute flag to a new value. The <var>mute</var> argument is either 0 for not muted, or 1 for muted.
@@ -245,8 +247,8 @@ This method will fail if the mixer has no playback mute capabilities
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-27"><tt class="method">setrec</tt></a></b>(</nobr></td>
<td><var>capture,</var><big>[</big><var>channel</var><big>]</big>)</td></tr></table>
<td><nobr><b><tt id='l2h-27' xml:id='l2h-27' class="method">setrec</tt></b>(</nobr></td>
<td><var>capture,</var><big>[</big><var>channel</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
Sets the capture mute flag to a new value. The <var>capture</var> argument is either 0 for no capture,
or 1 for capture.
@@ -285,37 +287,39 @@ and that which I do understand has come from a painful trial and error process.
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@@ -51,7 +52,7 @@
</H1>
<P>
<A NAME="module-alsaaudio"></A>
<P>
<p class="availability">Availability: <span
@@ -67,8 +68,8 @@ ALSA.
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-2"><tt class="function">mixers</tt></a></b>(</nobr></td>
<td><big>[</big><var>cardname</var><big>]</big>)</td></tr></table>
<td><nobr><b><tt id='l2h-2' xml:id='l2h-2' class="function">mixers</tt></b>(</nobr></td>
<td><var></var><big>[</big><var>cardname</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
List the available mixers. The optional <var>cardname</var> specifies which
card should be queried (this is only relevant if you have more than one
@@ -77,8 +78,8 @@ sound card). Omit to use the default sound card
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><span class="typelabel">class</span>&nbsp;<a name="l2h-3"><tt class="class">PCM</tt></a></b>(</nobr></td>
<td><big>[</big><var>type</var><big>]</big><var>, </var><big>[</big><var>mode</var><big>]</big><var>, </var><big>[</big><var>cardname</var><big>]</big>)</td></tr></table>
<td><nobr><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-3' xml:id='l2h-3' class="class">PCM</tt></b>(</nobr></td>
<td><var></var><big>[</big><var>type</var><big>]</big><var>, </var><big>[</big><var>mode</var><big>]</big><var>, </var><big>[</big><var>cardname</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
This class is used to represent a PCM device (both playback and capture devices).
The arguments are:
@@ -90,8 +91,8 @@ if you have more than one sound card). Omit to use the default sound card
<P>
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<td><nobr><b><span class="typelabel">class</span>&nbsp;<a name="l2h-4"><tt class="class">Mixer</tt></a></b>(</nobr></td>
<td><big>[</big><var>control</var><big>]</big><var>, </var><big>[</big><var>id</var><big>]</big><var>, </var><big>[</big><var>cardname</var><big>]</big>)</td></tr></table>
<td><nobr><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-4' xml:id='l2h-4' class="class">Mixer</tt></b>(</nobr></td>
<td><var></var><big>[</big><var>control</var><big>]</big><var>, </var><big>[</big><var>id</var><big>]</big><var>, </var><big>[</big><var>cardname</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
This class is used to access a specific ALSA mixer.
The arguments are:
@@ -102,16 +103,17 @@ if you have more than one sound card). Omit to use the default sound card
</dl>
<P>
<dl><dt><b><span class="typelabel">exception</span>&nbsp;<a name="l2h-5"><tt class="exception">ALSAAudioError</tt></a></b>
<dl><dt><b><span class="typelabel">exception</span>&nbsp;<tt id='l2h-5' xml:id='l2h-5' class="exception">ALSAAudioError</tt></b></dt>
<dd>
Exception raised when an operation fails for a ALSA specific reason.
The exception argument is a string describing the reason of the
failure.
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@@ -122,39 +124,42 @@ failure.
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@@ -113,7 +114,7 @@ slower and read or write multiple periods at the same time.
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</DD>
<DT><STRONG>Period size</STRONG></DT>
<DD>This is the size of each period in Hz. <i>Not bytes, but Hz!.</i> In <tt class="module">alsaaudio</tt>
<DD>This is the size of each period in Hz. <em>Not bytes, but Hz!.</em> In <tt class="module">alsaaudio</tt>
the period size is set directly, and it is therefore important to understand the significance of this
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@@ -128,37 +129,39 @@ Once you understand these concepts, you will be ready to actually utilize PCM AP
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<H2><A NAME="SECTION002440000000000000000">&nbsp;</A>
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<H2><A NAME="SECTION002420000000000000000">&nbsp;</A>
<H2><A NAME="SECTION002420000000000000000"></A>
<A NAME="pcm-objects"></A>
<BR>
4.2 PCM Objects
</H2>
@@ -63,8 +65,8 @@ constructor takes the following arguments:
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><span class="typelabel">class</span>&nbsp;<a name="l2h-6"><tt class="class">PCM</tt></a></b>(</nobr></td>
<td><big>[</big><var>type</var><big>]</big><var>, </var><big>[</big><var>mode</var><big>]</big><var>, </var><big>[</big><var>cardname</var><big>]</big>)</td></tr></table>
<td><nobr><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-6' xml:id='l2h-6' class="class">PCM</tt></b>(</nobr></td>
<td><var></var><big>[</big><var>type</var><big>]</big><var>, </var><big>[</big><var>mode</var><big>]</big><var>, </var><big>[</big><var>cardname</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
<P>
@@ -102,32 +104,32 @@ PCM objects have the following methods:
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-7"><tt class="method">pcmtype</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-7' xml:id='l2h-7' class="method">pcmtype</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Returns the type of PCM object. Either PCM_CAPTURE or PCM_PLAYBACK.
</dl>
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-8"><tt class="method">pcmmode</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-8' xml:id='l2h-8' class="method">pcmmode</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Return the mode of the PCM object. One of PCM_NONBLOCK, PCM_ASYNC, or PCM_NORMAL
</dl>
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-9"><tt class="method">cardname</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-9' xml:id='l2h-9' class="method">cardname</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Return the name of the sound card used by this PCM object.
</dl>
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-10"><tt class="method">setchannels</tt></a></b>(</nobr></td>
<td><var>nchannels</var>)</td></tr></table>
<td><nobr><b><tt id='l2h-10' xml:id='l2h-10' class="method">setchannels</tt></b>(</nobr></td>
<td><var>nchannels</var>)</td></tr></table></dt>
<dd>
Used to set the number of capture or playback channels. Common values are: 1 = mono, 2 = stereo,
and 6 = full 6 channel audio. Few sound cards support more than 2 channels
@@ -135,8 +137,8 @@ and 6 = full 6 channel audio. Few sound cards support more than 2 channels
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-11"><tt class="method">setrate</tt></a></b>(</nobr></td>
<td><var>rate</var>)</td></tr></table>
<td><nobr><b><tt id='l2h-11' xml:id='l2h-11' class="method">setrate</tt></b>(</nobr></td>
<td><var>rate</var>)</td></tr></table></dt>
<dd>
Set the sample rate in Hz for the device. Typical values are 8000 (poor sound), 16000, 44100 (cd quality),
and 96000
@@ -144,77 +146,77 @@ and 96000
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-12"><tt class="method">setformat</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-12' xml:id='l2h-12' class="method">setformat</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
The sound format of the device. Sound format controls how the PCM device interpret data for playback,
and how data is encoded in captures.
<P>
The following formats are provided by ALSA:
<table border align="center" style="border-collapse: collapse">
<div class="center"><table class="realtable">
<thead>
<tr class="tableheader">
<th align="left"><b>Format</b>&nbsp;</th>
<th align="left"><b>Description</b>&nbsp;</th>
<tr>
<th class="left" >Format</th>
<th class="left" >Description</th>
</tr>
</thead>
<tbody valign="baseline">
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_S8</Formats></td>
<td align="left">Signed 8 bit samples for each channel</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_U8</Formats></td>
<td align="left">Signed 8 bit samples for each channel</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_S16_LE</Formats></td>
<td align="left">Signed 16 bit samples for each channel (Little Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_S16_BE</Formats></td>
<td align="left">Signed 16 bit samples for each channel (Big Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_U16_LE</Formats></td>
<td align="left">Unsigned 16 bit samples for each channel (Little Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_U16_BE</Formats></td>
<td align="left">Unsigned 16 bit samples for each channel (Big Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_S24_LE</Formats></td>
<td align="left">Signed 24 bit samples for each channel (Little Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_S24_BE</Formats></td>
<td align="left">Signed 24 bit samples for each channel (Big Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_U24_LE</Formats></td>
<td align="left">Unsigned 24 bit samples for each channel (Little Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_U24_BE</Formats></td>
<td align="left">Unsigned 24 bit samples for each channel (Big Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_S32_LE</Formats></td>
<td align="left">Signed 32 bit samples for each channel (Little Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_S32_BE</Formats></td>
<td align="left">Signed 32 bit samples for each channel (Big Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_U32_LE</Formats></td>
<td align="left">Unsigned 32 bit samples for each channel (Little Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_U32_BE</Formats></td>
<td align="left">Unsigned 32 bit samples for each channel (Big Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_FLOAT_LE</Formats></td>
<td align="left">32 bit samples encoded as float. (Little Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_FLOAT_BE</Formats></td>
<td align="left">32 bit samples encoded as float (Big Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_FLOAT64_LE</Formats></td>
<td align="left">64 bit samples encoded as float. (Little Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_FLOAT64_BE</Formats></td>
<td align="left">64 bit samples encoded as float. (Big Endian byte order)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_MU_LAW</Formats></td>
<td align="left">A logarithmic encoding (used by Sun .au files)</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_A_LAW</Formats></td>
<td align="left">Another logarithmic encoding</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_IMA_ADPCM</Formats></td>
<td align="left">a 4:1 compressed format defined by the Interactive Multimedia Association</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_MPEG</Formats></td>
<td align="left">MPEG encoded audio?</td>
<tr><td align="left" valign="baseline"><Formats>PCM_FORMAT_GSM</Formats></td>
<td align="left">9600 constant rate encoding well suitet for speech</td></tbody>
</table>
<tbody>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_S8</Formats></td>
<td class="left" >Signed 8 bit samples for each channel</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_U8</Formats></td>
<td class="left" >Signed 8 bit samples for each channel</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_S16_LE</Formats></td>
<td class="left" >Signed 16 bit samples for each channel (Little Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_S16_BE</Formats></td>
<td class="left" >Signed 16 bit samples for each channel (Big Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_U16_LE</Formats></td>
<td class="left" >Unsigned 16 bit samples for each channel (Little Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_U16_BE</Formats></td>
<td class="left" >Unsigned 16 bit samples for each channel (Big Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_S24_LE</Formats></td>
<td class="left" >Signed 24 bit samples for each channel (Little Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_S24_BE</Formats></td>
<td class="left" >Signed 24 bit samples for each channel (Big Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_U24_LE</Formats></td>
<td class="left" >Unsigned 24 bit samples for each channel (Little Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_U24_BE</Formats></td>
<td class="left" >Unsigned 24 bit samples for each channel (Big Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_S32_LE</Formats></td>
<td class="left" >Signed 32 bit samples for each channel (Little Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_S32_BE</Formats></td>
<td class="left" >Signed 32 bit samples for each channel (Big Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_U32_LE</Formats></td>
<td class="left" >Unsigned 32 bit samples for each channel (Little Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_U32_BE</Formats></td>
<td class="left" >Unsigned 32 bit samples for each channel (Big Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_FLOAT_LE</Formats></td>
<td class="left" >32 bit samples encoded as float. (Little Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_FLOAT_BE</Formats></td>
<td class="left" >32 bit samples encoded as float (Big Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_FLOAT64_LE</Formats></td>
<td class="left" >64 bit samples encoded as float. (Little Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_FLOAT64_BE</Formats></td>
<td class="left" >64 bit samples encoded as float. (Big Endian byte order)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_MU_LAW</Formats></td>
<td class="left" >A logarithmic encoding (used by Sun .au files)</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_A_LAW</Formats></td>
<td class="left" >Another logarithmic encoding</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_IMA_ADPCM</Formats></td>
<td class="left" >a 4:1 compressed format defined by the Interactive Multimedia Association</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_MPEG</Formats></td>
<td class="left" >MPEG encoded audio?</td></tr>
<tr><td class="left" valign="baseline"><Formats>PCM_FORMAT_GSM</Formats></td>
<td class="left" >9600 constant rate encoding well suitet for speech</td></tr></tbody>
</table></div>
<P>
</dl>
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-13"><tt class="method">setperiodsize</tt></a></b>(</nobr></td>
<td><var>period</var>)</td></tr></table>
<td><nobr><b><tt id='l2h-13' xml:id='l2h-13' class="method">setperiodsize</tt></b>(</nobr></td>
<td><var>period</var>)</td></tr></table></dt>
<dd>
Sets the actual period size in frames. Each write should consist of exactly this number of frames, and
each read will return this number of frames (unless the device is in PCM_NONBLOCK mode, in which case
@@ -223,11 +225,11 @@ it may return nothing at all)
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-14"><tt class="method">read</tt></a></b>(</nobr></td>
<td>)</td></tr></table>
<td><nobr><b><tt id='l2h-14' xml:id='l2h-14' class="method">read</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
In PCM_NORMAL mode, this function blocks until a full period is available, and then returns a
tuple (length,data) where <i>length</i> is the size in bytes of the captured data, and <i>data</i>
tuple (length,data) where <em>length</em> is the size in bytes of the captured data, and <em>data</em>
is the captured sound frames as a string. The length of the returned data will be periodsize*framesize
bytes.
@@ -238,11 +240,11 @@ has become available since the last call to read.
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><a name="l2h-15"><tt class="method">write</tt></a></b>(</nobr></td>
<td><var>data</var>)</td></tr></table>
<td><nobr><b><tt id='l2h-15' xml:id='l2h-15' class="method">write</tt></b>(</nobr></td>
<td><var>data</var>)</td></tr></table></dt>
<dd>
Writes (plays) the sound in data. The length of data <i>must</i> be a multiple of the frame size, and
<i>should</i> be exactly the size of a period. If less than 'period size' frames are provided, the actual
Writes (plays) the sound in data. The length of data <em>must</em> be a multiple of the frame size, and
<em>should</em> be exactly the size of a period. If less than 'period size' frames are provided, the actual
playout will not happen until more data is written.
<P>
@@ -258,14 +260,14 @@ full. In this case, the data should be written at a later time.
</dl>
<P>
<b>A few hints on using PCM devices for playback</b>
<strong>A few hints on using PCM devices for playback</strong>
<P>
The most common reason for problems with playback of PCM audio, is that the people don't properly understand
that writes to PCM devices must match <i>exactly</i> the data rate of the device.
that writes to PCM devices must match <em>exactly</em> the data rate of the device.
<P>
If too little data is written to the device will an underrun, and ugly clicking sounds will occur. Conversely,
If too little data is written to the device, it will underrun, and ugly clicking sounds will occur. Conversely,
of too much data is written to the device, the write function will either block (PCM_NORMAL mode) or return zero
(PCM_NONBLOCK mode).
@@ -289,37 +291,39 @@ extra writes as nessecary.
<P>
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.productions > table td:first-child + td + td {
font-family: "lucida typewriter",
lucidatypewriter,
monospace;
vertical-align: baseline;
}
.productions > table td:first-child + td {
padding-left: 1em;
padding-right: 1em;
}
.productions > table tr { vertical-align: baseline; }
.email { font-family: avantgarde, sans-serif; }
.mailheader { font-family: avantgarde, sans-serif; }
.mimetype { font-family: avantgarde, sans-serif; }
.newsgroup { font-family: avantgarde, sans-serif; }
.url { font-family: avantgarde, sans-serif; }
.file { font-family: avantgarde, sans-serif; }
.guilabel { font-family: avantgarde, sans-serif; }
.realtable { border-collapse: collapse;
border-color: black;
border-style: solid;
border-width: 0px 0px 2px 0px;
empty-cells: show;
margin-left: auto;
margin-right: auto;
padding-left: 0.4em;
padding-right: 0.4em;
}
.realtable tbody { vertical-align: baseline; }
.realtable tfoot { display: table-footer-group; }
.realtable thead { background-color: #99ccff;
border-width: 0px 0px 2px 1px;
display: table-header-group;
font-family: avantgarde, sans-serif;
font-weight: bold;
vertical-align: baseline;
}
.realtable thead :first-child {
border-width: 0px 0px 2px 0px;
}
.realtable thead th { border-width: 0px 0px 2px 1px }
.realtable td,
.realtable th { border-color: black;
border-style: solid;
border-width: 0px 0px 1px 1px;
padding-left: 0.4em;
padding-right: 0.4em;
}
.realtable td:first-child,
.realtable th:first-child {
border-left-width: 0px;
vertical-align: baseline;
}
.center { text-align: center; }
.left { text-align: left; }
.right { text-align: right; }
.refcount-info { font-style: italic; }
.refcount-info .value { font-weight: bold;
color: #006600; }
/*
* Some decoration for the "See also:" blocks, in part inspired by some of
* the styling on Lars Marius Garshol's XSA pages.
* (The blue in the navigation bars is #99CCFF.)
*/
.seealso { background-color: #fffaf0;
border: thin solid black;
padding: 0pt 1em 4pt 1em; }
.seealso > .heading { font-size: 110%;
font-weight: bold; }
/*
* Class 'availability' is used for module availability statements at
* the top of modules.
*/
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/*
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*/
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.du-xxx:before { content: "** ";
font-weight: bold; }
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/*
* Some specialization for printed output.
*/
@media print {
.online-navigation { display: none; }
}
doc/pyalsaaudio.html
+52 -45
View File
@@ -1,55 +1,57 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css'>
<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio'>
<link rel='contents' href='contents.html' title="Contents">
<link rel='last' href='about.html' title='About this document...'>
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<meta name='aesop' content='information'>
<META NAME="description" CONTENT="PyAlsaAudio">
<META NAME="keywords" CONTENT="pyalsaaudio">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css' />
<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio' />
<link rel='contents' href='contents.html' title="Contents" />
<link rel='last' href='about.html' title='About this document...' />
<link rel='help' href='about.html' title='About this document...' />
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<meta name='aesop' content='information' />
<title>PyAlsaAudio</title>
</head>
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<div class="titlepage">
<center>
<div class='center'>
<h1>PyAlsaAudio</h1>
<p><b><font size="+2">Casper Wilstrup</font></b></p>
<p>cwi@unispeed.com</p>
<p>
</center>
<p></p>
</div>
</div>
<P>
<p><hr>
<p><br /></p><hr class='online-navigation' />
<div class='online-navigation'>
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<A NAME="CHILD_LINKS"></a>
@@ -71,31 +73,36 @@
<LI><A href="about.html">About this document ...</a>
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<td><a rel="contents" title="Table of Contents"
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<span class="release-info">Release 0.1.</span>
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<span class="release-info">Release 0.2.</span>
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doc/src/Makefile
+6 -1
View File
@@ -5,7 +5,7 @@
#
# You also need a working latex installation, and the latex2html
# tool installed.
PYTHONSOURCE = /usr/src/Python-2.3.4/
PYTHONSOURCE = /usr/src/Python-2.4.1/
# Shouldn't need to change anything below here!
@@ -13,3 +13,8 @@ MKHOWTO = $(PYTHONSOURCE)/Doc/tools/mkhowto
all:
$(MKHOWTO) --dir .. --html pyalsaaudio.tex
text:
$(MKHOWTO) --dir .. --text pyalsaaudio.tex
doc/src/libalsaaudio.tex
+2 -2
View File
@@ -234,7 +234,7 @@ full. In this case, the data should be written at a later time.
The most common reason for problems with playback of PCM audio, is that the people don't properly understand
that writes to PCM devices must match \emph{exactly} the data rate of the device.
If too little data is written to the device will an underrun, and ugly clicking sounds will occur. Conversely,
If too little data is written to the device, it will underrun, and ugly clicking sounds will occur. Conversely,
of too much data is written to the device, the write function will either block (PCM_NORMAL mode) or return zero
(PCM_NONBLOCK mode).
@@ -394,4 +394,4 @@ and that which I do understand has come from a painful trial and error process.
\subsection{ALSA Examples \label{pcm-example}}
For now, the only examples available are the 'playbacktest.py' and the 'recordtest.py' programs included.
This will change in a future version.
This will change in a future version.
doc/src/pyalsaaudio.tex
+1 -1
View File
@@ -2,7 +2,7 @@
\title{PyAlsaAudio}
\release{0.1}
\release{0.2}
% At minimum, give your name and an email address. You can include a
% snail-mail address if you like.