forked from auracaster/pyalsaaudio
Import from divmod. Added css. Original log message:
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
This commit is contained in:
larsimmisch
8
CHANGES
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8
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@@ -0,0 +1,8 @@
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VERSION 0.1
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- Initial version
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VERSION 0.2
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- Many bugfixes related to playback in particular
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- Module documentation in the doc subdirectory
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54
LICENSE
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54
LICENSE
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@@ -0,0 +1,54 @@
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PyAlsaAudio is released under the same conditions as Python itself.
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The original wording of this license can be found below.
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PSF LICENSE AGREEMENT FOR PYTHON 2.4
|
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------------------------------------
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|
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1. This LICENSE AGREEMENT is between the Python Software Foundation
|
||||
("PSF"), and the Individual or Organization ("Licensee") accessing and
|
||||
otherwise using Python 2.4 software in source or binary form and its
|
||||
associated documentation.
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|
||||
2. Subject to the terms and conditions of this License Agreement, PSF
|
||||
hereby grants Licensee a nonexclusive, royalty-free, world-wide
|
||||
license to reproduce, analyze, test, perform and/or display publicly,
|
||||
prepare derivative works, distribute, and otherwise use Python 2.4
|
||||
alone or in any derivative version, provided, however, that PSF's
|
||||
License Agreement and PSF's notice of copyright, i.e., "Copyright (c)
|
||||
2001, 2002, 2003, 2004 Python Software Foundation; All Rights Reserved"
|
||||
are retained in Python 2.4 alone or in any derivative version prepared
|
||||
by Licensee.
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||||
|
||||
3. In the event Licensee prepares a derivative work that is based on
|
||||
or incorporates Python 2.4 or any part thereof, and wants to make
|
||||
the derivative work available to others as provided herein, then
|
||||
Licensee hereby agrees to include in any such work a brief summary of
|
||||
the changes made to Python 2.4.
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||||
|
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4. PSF is making Python 2.4 available to Licensee on an "AS IS"
|
||||
basis. PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
|
||||
IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND
|
||||
DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
|
||||
FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON 2.4 WILL NOT
|
||||
INFRINGE ANY THIRD PARTY RIGHTS.
|
||||
|
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5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
|
||||
2.4 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
|
||||
A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 2.4,
|
||||
OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
|
||||
|
||||
6. This License Agreement will automatically terminate upon a material
|
||||
breach of its terms and conditions.
|
||||
|
||||
7. Nothing in this License Agreement shall be deemed to create any
|
||||
relationship of agency, partnership, or joint venture between PSF and
|
||||
Licensee. This License Agreement does not grant permission to use PSF
|
||||
trademarks or trade name in a trademark sense to endorse or promote
|
||||
products or services of Licensee, or any third party.
|
||||
|
||||
8. By copying, installing or otherwise using Python 2.4, Licensee
|
||||
agrees to be bound by the terms and conditions of this License
|
||||
Agreement.
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||||
|
||||
|
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13
README
13
README
@@ -24,7 +24,10 @@ Installation
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Note: the wrappers link with the alsasound library alsa (from the alsa-lib
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package). Verify that this is installed by looking for /usr/lib/libasound.so
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before building. Naturally you also need to use a kernel with proper ALSA
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before building. The libasound development files are also neccesary. On debian
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and derivatives, this is achieved by installing the alsalib-dev package.
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Naturally you also need to use a kernel with proper ALSA
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support. This is the default in Linux kernel 2.6 and later. If you are using
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kernel version 2.4 you may need to install the ALSA patches yourself - although
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most distributions ship with ALSA kernels.
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@@ -38,13 +41,15 @@ And then as root:
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Using the API
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=============
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There is a reasonably usefull API documentation included in the module
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documentation, which can be found in the doc subdirectory of the source
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distribution.
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There are two example programs included with the source:
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There are also three example programs included with the source:
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'playbacktest.py' which plays back raw sound data read from
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stdin
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'recordtest.py' which captures sound from the microphone at writes
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it raw to stdout.
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In a future version, I'll include documentation with the package, but
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for now, you're stuck with the examples.
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'mixertest.py' which can be used to manipulate the mixers
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1
TODO
1
TODO
@@ -1,4 +1,3 @@
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- Write documentation
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- Better example code (aplay,arecord,amixer workalike for example)
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- Implement MIDI/sequencer support.
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@@ -373,7 +373,7 @@ static PyObject *alsapcm_write(alsapcm_t *self, PyObject *args) {
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int res;
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if (!PyArg_ParseTuple(args,"s#",&data,&datalen)) return NULL;
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if (datalen%self->framesize) {
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PyErr_SetString(ALSAAudioError,"Data size must be a multipla of framesize");
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PyErr_SetString(ALSAAudioError,"Data size must be a multiple of framesize");
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return NULL;
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}
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res = snd_pcm_writei(self->handle, data, datalen/self->framesize);
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@@ -1,44 +1,45 @@
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<html>
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<head>
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<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css'>
|
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<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio'>
|
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<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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<LINK REL="prev" href="contents.html">
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<LINK REL="parent" HREF="pyalsaaudio.html">
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<meta name='aesop' content='information'>
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<META NAME="description" CONTENT="About this document ...">
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<META NAME="keywords" CONTENT="pyalsaaudio">
|
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<META NAME="resource-type" CONTENT="document">
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<META NAME="distribution" CONTENT="global">
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<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css' />
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<link rel="first" href="pyalsaaudio.html" title='PyAlsaAudio' />
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<link rel='contents' href='contents.html' title="Contents" />
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<link rel='last' href='about.html' title='About this document...' />
|
||||
<link rel='help' href='about.html' title='About this document...' />
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<link rel="prev" href="contents.html" />
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<link rel="parent" href="pyalsaaudio.html" />
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<meta name='aesop' content='information' />
|
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<title>About this document ...</title>
|
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</head>
|
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<body>
|
||||
<DIV CLASS="navigation">
|
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<div id='top-navigation-panel' xml:id='top-navigation-panel'>
|
||||
<table align="center" width="100%" cellpadding="0" cellspacing="2">
|
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<tr>
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<td><a rel="prev" title="4.4 ALSA Examples"
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href="pcm-example.html"><img src='previous.gif'
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border='0' height='32' alt='Previous Page' width='32'></A></td>
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<td><a rel="parent" title="PyAlsaAudio"
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HREF="pyalsaaudio.html"><img src='up.gif'
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border='0' height='32' alt='Up One Level' width='32'></A></td>
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<td><img src='blank.gif'
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border='0' height='32' alt='' width='32'></td>
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<td class='online-navigation'><a rel="prev" title="4.4 ALSA Examples"
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href="pcm-example.html"><img src='previous.png'
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border='0' height='32' alt='Previous Page' width='32' /></A></td>
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<td class='online-navigation'><a rel="parent" title="PyAlsaAudio"
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href="pyalsaaudio.html"><img src='up.png'
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border='0' height='32' alt='Up One Level' width='32' /></A></td>
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<td class='online-navigation'><img src='next.png'
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border='0' height='32' alt='Next Page' width='32' /></td>
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<td align="center" width="100%">PyAlsaAudio</td>
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<td><a rel="contents" title="Table of Contents"
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href="contents.html"><img src='contents.gif'
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border='0' height='32' alt='Contents' width='32'></A></td>
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<td><img src='blank.gif'
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border='0' height='32' alt='' width='32'></td>
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<td class='online-navigation'><a rel="contents" title="Table of Contents"
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href="contents.html"><img src='contents.png'
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border='0' height='32' alt='Contents' width='32' /></A></td>
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<td class='online-navigation'><img src='blank.png'
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border='0' height='32' alt='' width='32' /></td>
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<td class='online-navigation'><img src='blank.png'
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border='0' height='32' alt='' width='32' /></td>
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</tr></table>
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<div class='online-navigation'>
|
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<b class="navlabel">Previous:</b>
|
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<a class="sectref" rel="prev" href="pcm-example.html">4.4 ALSA Examples</A>
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<b class="navlabel">Up:</b>
|
||||
<a class="sectref" rel="parent" HREF="pyalsaaudio.html">PyAlsaAudio</A>
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<br><hr>
|
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<a class="sectref" rel="parent" href="pyalsaaudio.html">PyAlsaAudio</A>
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</div>
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<hr /></div>
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</DIV>
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<!--End of Navigation Panel-->
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@@ -72,33 +73,36 @@ About this document ...</A>
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</p>
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<DIV CLASS="navigation">
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<p><hr>
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<div class='online-navigation'>
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<p></p><hr />
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<table align="center" width="100%" cellpadding="0" cellspacing="2">
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<tr>
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<td><a rel="prev" title="4.4 ALSA Examples"
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rel="prev" title="4.4 ALSA Examples"
|
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href="pcm-example.html"><img src='previous.gif'
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border='0' height='32' alt='Previous Page' width='32'></A></td>
|
||||
<td><a rel="parent" title="PyAlsaAudio"
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rel="parent" title="PyAlsaAudio"
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HREF="pyalsaaudio.html"><img src='up.gif'
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border='0' height='32' alt='Up One Level' width='32'></A></td>
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<td><img src='blank.gif'
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border='0' height='32' alt='' width='32'></td>
|
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<td class='online-navigation'><a rel="prev" title="4.4 ALSA Examples"
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href="pcm-example.html"><img src='previous.png'
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border='0' height='32' alt='Previous Page' width='32' /></A></td>
|
||||
<td class='online-navigation'><a rel="parent" title="PyAlsaAudio"
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||||
href="pyalsaaudio.html"><img src='up.png'
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border='0' height='32' alt='Up One Level' width='32' /></A></td>
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<td class='online-navigation'><img src='next.png'
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border='0' height='32' alt='Next Page' width='32' /></td>
|
||||
<td align="center" width="100%">PyAlsaAudio</td>
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<td><a rel="contents" title="Table of Contents"
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||||
rel="contents" title="Table of Contents"
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||||
href="contents.html"><img src='contents.gif'
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||||
border='0' height='32' alt='Contents' width='32'></A></td>
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||||
<td><img src='blank.gif'
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border='0' height='32' alt='' width='32'></td>
|
||||
<td class='online-navigation'><a rel="contents" title="Table of Contents"
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||||
href="contents.html"><img src='contents.png'
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border='0' height='32' alt='Contents' width='32' /></A></td>
|
||||
<td class='online-navigation'><img src='blank.png'
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||||
border='0' height='32' alt='' width='32' /></td>
|
||||
<td class='online-navigation'><img src='blank.png'
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||||
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>
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<hr>
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<span class="release-info">Release 0.1.</span>
|
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<a class="sectref" rel="parent" href="pyalsaaudio.html">PyAlsaAudio</A>
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</div>
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</div>
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<hr />
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<span class="release-info">Release 0.2.</span>
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</DIV>
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<!--End of Navigation Panel-->
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@@ -1,52 +1,54 @@
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<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">
|
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<LINK REL="parent" HREF="pyalsaaudio.html">
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<LINK REL="next" HREF="node3.html">
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||||
<meta name='aesop' content='information'>
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<META NAME="description" CONTENT="Contents">
|
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<META NAME="keywords" CONTENT="pyalsaaudio">
|
||||
<META NAME="resource-type" CONTENT="document">
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<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" />
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<link rel="parent" href="pyalsaaudio.html" />
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||||
<link rel="next" href="node3.html" />
|
||||
<meta name='aesop' content='information' />
|
||||
<title>Contents</title>
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||||
</head>
|
||||
<body>
|
||||
<DIV CLASS="navigation">
|
||||
<div id='top-navigation-panel' xml:id='top-navigation-panel'>
|
||||
<table align="center" width="100%" cellpadding="0" cellspacing="2">
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||||
<tr>
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<td><a rel="prev" title="Front Matter"
|
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href="front.html"><img src='previous.gif'
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border='0' height='32' alt='Previous Page' width='32'></A></td>
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<td><a rel="parent" title="PyAlsaAudio"
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HREF="pyalsaaudio.html"><img src='up.gif'
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border='0' height='32' alt='Up One Level' width='32'></A></td>
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<td><a rel="next" title="1 What is ALSA"
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HREF="node3.html"><img src='next.gif'
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border='0' height='32' alt='Next Page' width='32'></A></td>
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<td class='online-navigation'><a rel="prev" title="Front Matter"
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href="front.html"><img src='previous.png'
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border='0' height='32' alt='Previous Page' width='32' /></A></td>
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<td class='online-navigation'><a rel="parent" title="PyAlsaAudio"
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href="pyalsaaudio.html"><img src='up.png'
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border='0' height='32' alt='Up One Level' width='32' /></A></td>
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<td class='online-navigation'><a rel="next" title="1 What is ALSA"
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href="node3.html"><img src='next.png'
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border='0' height='32' alt='Next Page' width='32' /></A></td>
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<td align="center" width="100%">PyAlsaAudio</td>
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<td><img src='blank.gif'
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border='0' height='32' alt='' width='32'></td>
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<td class='online-navigation'><img src='blank.png'
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border='0' height='32' alt='' width='32' /></td>
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<td class='online-navigation'><img src='blank.png'
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border='0' height='32' alt='' width='32' /></td>
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<td class='online-navigation'><img src='blank.png'
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border='0' height='32' alt='' width='32' /></td>
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</tr></table>
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<div class='online-navigation'>
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<b class="navlabel">Previous:</b>
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<a class="sectref" rel="prev" href="front.html">Front Matter</A>
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<b class="navlabel">Up:</b>
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<a class="sectref" rel="parent" HREF="pyalsaaudio.html">PyAlsaAudio</A>
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<a class="sectref" rel="parent" href="pyalsaaudio.html">PyAlsaAudio</A>
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<b class="navlabel">Next:</b>
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<a class="sectref" rel="next" HREF="node3.html">1 What is ALSA</A>
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<br><hr>
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<a class="sectref" rel="next" href="node3.html">1 What is ALSA</A>
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</div>
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<hr /></div>
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</DIV>
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<!--End of Navigation Panel-->
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<BR>
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<BR><H2><A NAME="SECTION002000000000000000000">
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<BR><h2><A NAME="SECTION002000000000000000000">
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Contents</A>
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</H2>
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</h2>
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<!--Table of Contents-->
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<UL CLASS="TofC">
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@@ -65,33 +67,38 @@ Contents</A>
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<P>
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<DIV CLASS="navigation">
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<p><hr>
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<div class='online-navigation'>
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<table align="center" width="100%" cellpadding="0" cellspacing="2">
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<tr>
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<td><a rel="prev" title="Front Matter"
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href="front.html"><img src='previous.gif'
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border='0' height='32' alt='Previous Page' width='32'></A></td>
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<td><a rel="parent" title="PyAlsaAudio"
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HREF="pyalsaaudio.html"><img src='up.gif'
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border='0' height='32' alt='Up One Level' width='32'></A></td>
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<td class='online-navigation'><a rel="parent" title="PyAlsaAudio"
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<center>
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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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<td align="center" width="100%">PyAlsaAudio</td>
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<b class="navlabel">Previous:</b>
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<a class="sectref" rel="prev" href="pcm-objects.html">4.2 PCM Objects</A>
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<a class="sectref" rel="parent" href="module-alsaaudio.html">4 alsaaudio</A>
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<b class="navlabel">Next:</b>
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<a class="sectref" rel="next" href="pcm-example.html">4.4 ALSA Examples</A>
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|
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<hr /></div>
|
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</DIV>
|
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<!--End of Navigation Panel-->
|
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|
||||
<H2><A NAME="SECTION002430000000000000000"> </A>
|
||||
<H2><A NAME="SECTION002430000000000000000"></A>
|
||||
<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> <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> <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> </th>
|
||||
<th align="left"><b>Description</b> </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> </th>
|
||||
<th align="left"><b>Description</b> </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.
|
||||
<P>
|
||||
|
||||
<DIV CLASS="navigation">
|
||||
<p><hr>
|
||||
<div class='online-navigation'>
|
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<p></p><hr />
|
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<table align="center" width="100%" cellpadding="0" cellspacing="2">
|
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<tr>
|
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|
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|
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|
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border='0' height='32' alt='Up One Level' width='32'></A></td>
|
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<td><a rel="next" title="4.4 ALSA Examples"
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|
||||
<td align="center" width="100%">PyAlsaAudio</td>
|
||||
<td><a rel="contents" title="Table of Contents"
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rel="contents" title="Table of Contents"
|
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href="contents.html"><img src='contents.gif'
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border='0' height='32' alt='Contents' width='32'></A></td>
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<td><img src='blank.gif'
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<td class='online-navigation'><img src='blank.png'
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<div class='online-navigation'>
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<b class="navlabel">Previous:</b>
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||||
<a class="sectref" rel="prev" href="pcm-objects.html">4.2 PCM Objects</A>
|
||||
<b class="navlabel">Up:</b>
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||||
<a class="sectref" rel="parent" href="module-alsaaudio.html">4 alsaaudio</A>
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||||
<b class="navlabel">Next:</b>
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||||
<a class="sectref" rel="next" href="pcm-example.html">4.4 ALSA Examples</A>
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<hr>
|
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<span class="release-info">Release 0.1.</span>
|
||||
</div>
|
||||
</div>
|
||||
<hr />
|
||||
<span class="release-info">Release 0.2.</span>
|
||||
</DIV>
|
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<!--End of Navigation Panel-->
|
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|
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|
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@@ -1,48 +1,49 @@
|
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
|
||||
<html>
|
||||
<head>
|
||||
<link rel="STYLESHEET" href="pyalsaaudio.css" type='text/css'>
|
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@@ -51,7 +52,7 @@
|
||||
</H1>
|
||||
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||||
<P>
|
||||
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||||
<A NAME="module-alsaaudio"></A>
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||||
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||||
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||||
<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> <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> <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>
|
||||
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
|
||||
<td><nobr><b><span class="typelabel">class</span> <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> <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> <a name="l2h-5"><tt class="exception">ALSAAudioError</tt></a></b>
|
||||
<dl><dt><b><span class="typelabel">exception</span> <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.
|
||||
</dl>
|
||||
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||||
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<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></a>
|
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@@ -122,39 +124,42 @@ failure.
|
||||
<LI><A href="pcm-example.html">4.4 ALSA Examples</a>
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107
doc/node3.html
107
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@@ -113,7 +114,7 @@ slower and read or write multiple periods at the same time.
|
||||
<P>
|
||||
</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
|
||||
number. If the period size is configured to for example 32, each write should contain exactly 32 frames
|
||||
of sound data, and each read will return either 32 frames of data or nothing at all.
|
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|
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|
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<BR>
|
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4.4 ALSA Examples
|
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4.2 PCM Objects
|
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</H2>
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|
||||
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||||
<P>
|
||||
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
|
||||
<td><nobr><b><span class="typelabel">class</span> <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> <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>
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|
||||
<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> </th>
|
||||
<th align="left"><b>Description</b> </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>
|
||||
|
||||
<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="4.1 PCM Terminology and"
|
||||
rel="prev" title="4.1 PCM Terminology and"
|
||||
HREF="node7.html"><img src='previous.gif'
|
||||
border='0' height='32' alt='Previous Page' width='32'></A></td>
|
||||
<td><a rel="parent" title="4 alsaaudio"
|
||||
rel="parent" title="4 alsaaudio"
|
||||
href="module-alsaaudio.html"><img src='up.gif'
|
||||
border='0' height='32' alt='Up One Level' width='32'></A></td>
|
||||
<td><a rel="next" title="4.3 Mixer Objects"
|
||||
rel="next" title="4.3 Mixer Objects"
|
||||
href="mixer-objects.html"><img src='next.gif'
|
||||
border='0' height='32' alt='Next Page' width='32'></A></td>
|
||||
<td class='online-navigation'><a rel="prev" title="4.1 PCM Terminology and"
|
||||
href="node7.html"><img src='previous.png'
|
||||
border='0' height='32' alt='Previous Page' width='32' /></A></td>
|
||||
<td class='online-navigation'><a rel="parent" title="4 alsaaudio"
|
||||
href="module-alsaaudio.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="4.3 Mixer Objects"
|
||||
href="mixer-objects.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="node7.html">4.1 PCM Terminology and</A>
|
||||
<a class="sectref" rel="prev" href="node7.html">4.1 PCM Terminology and</A>
|
||||
<b class="navlabel">Up:</b>
|
||||
<a class="sectref" rel="parent" href="module-alsaaudio.html">4 alsaaudio</A>
|
||||
<b class="navlabel">Next:</b>
|
||||
<a class="sectref" rel="next" href="mixer-objects.html">4.3 Mixer Objects</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-->
|
||||
|
||||
|
||||
243
doc/pyalsaaudio.css
Normal file
243
doc/pyalsaaudio.css
Normal file
@@ -0,0 +1,243 @@
|
||||
/*
|
||||
* The first part of this is the standard CSS generated by LaTeX2HTML,
|
||||
* with the "empty" declarations removed.
|
||||
*/
|
||||
|
||||
/* Century Schoolbook font is very similar to Computer Modern Math: cmmi */
|
||||
.math { font-family: "Century Schoolbook", serif; }
|
||||
.math i { font-family: "Century Schoolbook", serif;
|
||||
font-weight: bold }
|
||||
.boldmath { font-family: "Century Schoolbook", serif;
|
||||
font-weight: bold }
|
||||
|
||||
/*
|
||||
* Implement both fixed-size and relative sizes.
|
||||
*
|
||||
* I think these can be safely removed, as it doesn't appear that
|
||||
* LaTeX2HTML ever generates these, even though these are carried
|
||||
* over from the LaTeX2HTML stylesheet.
|
||||
*/
|
||||
small.xtiny { font-size : xx-small; }
|
||||
small.tiny { font-size : x-small; }
|
||||
small.scriptsize { font-size : smaller; }
|
||||
small.footnotesize { font-size : small; }
|
||||
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|
||||
big.xxlarge { font-size : x-large; }
|
||||
big.huge { font-size : larger; }
|
||||
big.xhuge { font-size : xx-large; }
|
||||
|
||||
/*
|
||||
* Document-specific styles come next;
|
||||
* these are added for the Python documentation.
|
||||
*
|
||||
* Note that the size specifications for the H* elements are because
|
||||
* Netscape on Solaris otherwise doesn't get it right; they all end up
|
||||
* the normal text size.
|
||||
*/
|
||||
|
||||
body { color: #000000;
|
||||
background-color: #ffffff; }
|
||||
|
||||
a:link:active { color: #ff0000; }
|
||||
a:link:hover { background-color: #bbeeff; }
|
||||
a:visited:hover { background-color: #bbeeff; }
|
||||
a:visited { color: #551a8b; }
|
||||
a:link { color: #0000bb; }
|
||||
|
||||
h1, h2, h3, h4, h5, h6 { font-family: avantgarde, sans-serif;
|
||||
font-weight: bold; }
|
||||
h1 { font-size: 180%; }
|
||||
h2 { font-size: 150%; }
|
||||
h3, h4 { font-size: 120%; }
|
||||
|
||||
/* These are section titles used in navigation links, so make sure we
|
||||
* match the section header font here, even it not the weight.
|
||||
*/
|
||||
.sectref { font-family: avantgarde, sans-serif; }
|
||||
/* And the label before the titles in navigation: */
|
||||
.navlabel { font-size: 85%; }
|
||||
|
||||
|
||||
/* LaTeX2HTML insists on inserting <br> elements into headers which
|
||||
* are marked with \label. This little bit of CSS magic ensures that
|
||||
* these elements don't cause spurious whitespace to be added.
|
||||
*/
|
||||
h1>br, h2>br, h3>br,
|
||||
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|
||||
|
||||
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|
||||
monospace; }
|
||||
var { font-family: times, serif;
|
||||
font-style: italic;
|
||||
font-weight: normal; }
|
||||
|
||||
.Unix { font-variant: small-caps; }
|
||||
|
||||
.typelabel { font-family: lucida, sans-serif; }
|
||||
|
||||
.navigation td { background-color: #99ccff;
|
||||
font-weight: bold;
|
||||
font-family: avantgarde, sans-serif;
|
||||
font-size: 110%; }
|
||||
|
||||
div.warning { background-color: #fffaf0;
|
||||
border: thin solid black;
|
||||
padding: 1em;
|
||||
margin-left: 2em;
|
||||
margin-right: 2em; }
|
||||
|
||||
div.warning .label { font-family: sans-serif;
|
||||
font-size: 110%;
|
||||
margin-right: 0.5em; }
|
||||
|
||||
div.note { background-color: #fffaf0;
|
||||
border: thin solid black;
|
||||
padding: 1em;
|
||||
margin-left: 2em;
|
||||
margin-right: 2em; }
|
||||
|
||||
div.note .label { margin-right: 0.5em;
|
||||
font-family: sans-serif; }
|
||||
|
||||
address { font-size: 80%; }
|
||||
.release-info { font-style: italic;
|
||||
font-size: 80%; }
|
||||
|
||||
.titlegraphic { vertical-align: top; }
|
||||
|
||||
.verbatim pre { color: #00008b;
|
||||
font-family: "lucida typewriter", lucidatypewriter,
|
||||
monospace;
|
||||
font-size: 90%; }
|
||||
.verbatim { margin-left: 2em; }
|
||||
.verbatim .footer { padding: 0.05in;
|
||||
font-size: 85%;
|
||||
background-color: #99ccff;
|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
.grammar-footer { padding: 0.05in;
|
||||
font-size: 85%; }
|
||||
.grammartoken { font-family: "lucida typewriter", lucidatypewriter,
|
||||
monospace; }
|
||||
|
||||
.productions { background-color: #bbeeff; }
|
||||
.productions a:active { color: #ff0000; }
|
||||
.productions a:link:hover { background-color: #99ccff; }
|
||||
.productions a:visited:hover { background-color: #99ccff; }
|
||||
.productions a:visited { color: #551a8b; }
|
||||
.productions a:link { color: #0000bb; }
|
||||
.productions table { vertical-align: baseline;
|
||||
empty-cells: show; }
|
||||
.productions > table td,
|
||||
.productions > table th { padding: 2px; }
|
||||
.productions > table td:first-child,
|
||||
.productions > table td:last-child {
|
||||
font-family: "lucida typewriter",
|
||||
lucidatypewriter,
|
||||
monospace;
|
||||
}
|
||||
/* same as the second selector above, but expressed differently for Opera */
|
||||
.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.
|
||||
*/
|
||||
.availability .platform { font-weight: bold; }
|
||||
|
||||
|
||||
/*
|
||||
* Additional styles for the distutils package.
|
||||
*/
|
||||
.du-command { font-family: monospace; }
|
||||
.du-option { font-family: avantgarde, sans-serif; }
|
||||
.du-filevar { font-family: avantgarde, sans-serif;
|
||||
font-style: italic; }
|
||||
.du-xxx:before { content: "** ";
|
||||
font-weight: bold; }
|
||||
.du-xxx:after { content: " **";
|
||||
font-weight: bold; }
|
||||
|
||||
|
||||
/*
|
||||
* Some specialization for printed output.
|
||||
*/
|
||||
@media print {
|
||||
.online-navigation { display: none; }
|
||||
}
|
||||
@@ -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>
|
||||
<div class='online-navigation'>
|
||||
<b class="navlabel">Next:</b>
|
||||
<a class="sectref" rel="next" href="front.html">Front Matter</A>
|
||||
<br><hr>
|
||||
</div>
|
||||
<hr /></div>
|
||||
</DIV>
|
||||
<!--End of Navigation Panel-->
|
||||
|
||||
<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'>
|
||||
<!--Table of Child-Links-->
|
||||
<A NAME="CHILD_LINKS"></a>
|
||||
|
||||
@@ -71,31 +73,36 @@
|
||||
<LI><A href="about.html">About this document ...</a>
|
||||
</ul>
|
||||
<!--End of Table of Child-Links-->
|
||||
</div>
|
||||
|
||||
<DIV CLASS="navigation">
|
||||
<p><hr>
|
||||
<div class='online-navigation'>
|
||||
<p></p><hr />
|
||||
<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"
|
||||
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"
|
||||
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">Next:</b>
|
||||
<a class="sectref" rel="next" href="front.html">Front Matter</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-->
|
||||
|
||||
|
||||
@@ -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
|
||||
|
||||
|
||||
|
||||
@@ -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.
|
||||
|
||||
@@ -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.
|
||||
|
||||
@@ -9,7 +9,9 @@
|
||||
## To test it out do the following:
|
||||
## python recordtest.py > out.raw # talk to the microphone
|
||||
## python playbacktest.py < out.raw
|
||||
|
||||
##
|
||||
## If you have Gnome, you could also just test by doing something like:
|
||||
## python playbacktest.py < /usr/share/sounds/gnibbles/laughter.wav
|
||||
import alsaaudio
|
||||
import sys
|
||||
import time
|
||||
|
||||
@@ -33,7 +33,7 @@ inp.setformat(alsaaudio.PCM_FORMAT_S16_LE)
|
||||
# mode.
|
||||
inp.setperiodsize(160)
|
||||
|
||||
loops = 10000
|
||||
loops = 1000000
|
||||
while loops > 0:
|
||||
loops -= 1
|
||||
# Read data from device
|
||||
|
||||
Reference in New Issue
Block a user