author | martin.trojer@nokia.com |
Fri, 31 Jul 2009 15:01:17 +0100 | |
changeset 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
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:mod:`al` --- Audio functions on the SGI |
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======================================== |
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.. module:: al |
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:platform: IRIX |
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:synopsis: Audio functions on the SGI. |
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:deprecated: |
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.. deprecated:: 2.6 |
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The :mod:`al` module has been deprecated for removal in Python 3.0. |
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This module provides access to the audio facilities of the SGI Indy and Indigo |
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workstations. See section 3A of the IRIX man pages for details. You'll need to |
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read those man pages to understand what these functions do! Some of the |
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functions are not available in IRIX releases before 4.0.5. Again, see the |
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manual to check whether a specific function is available on your platform. |
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All functions and methods defined in this module are equivalent to the C |
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functions with ``AL`` prefixed to their name. |
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.. index:: module: AL |
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Symbolic constants from the C header file ``<audio.h>`` are defined in the |
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standard module :mod:`AL`, see below. |
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.. warning:: |
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The current version of the audio library may dump core when bad argument values |
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are passed rather than returning an error status. Unfortunately, since the |
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precise circumstances under which this may happen are undocumented and hard to |
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check, the Python interface can provide no protection against this kind of |
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problems. (One example is specifying an excessive queue size --- there is no |
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documented upper limit.) |
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The module defines the following functions: |
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.. function:: openport(name, direction[, config]) |
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The name and direction arguments are strings. The optional *config* argument is |
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a configuration object as returned by :func:`newconfig`. The return value is an |
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:dfn:`audio port object`; methods of audio port objects are described below. |
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.. function:: newconfig() |
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The return value is a new :dfn:`audio configuration object`; methods of audio |
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configuration objects are described below. |
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.. function:: queryparams(device) |
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The device argument is an integer. The return value is a list of integers |
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containing the data returned by :cfunc:`ALqueryparams`. |
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.. function:: getparams(device, list) |
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The *device* argument is an integer. The list argument is a list such as |
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returned by :func:`queryparams`; it is modified in place (!). |
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.. function:: setparams(device, list) |
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The *device* argument is an integer. The *list* argument is a list such as |
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returned by :func:`queryparams`. |
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.. _al-config-objects: |
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Configuration Objects |
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--------------------- |
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Configuration objects returned by :func:`newconfig` have the following methods: |
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.. method:: audio configuration.getqueuesize() |
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Return the queue size. |
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.. method:: audio configuration.setqueuesize(size) |
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Set the queue size. |
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.. method:: audio configuration.getwidth() |
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Get the sample width. |
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.. method:: audio configuration.setwidth(width) |
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Set the sample width. |
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.. method:: audio configuration.getchannels() |
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Get the channel count. |
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.. method:: audio configuration.setchannels(nchannels) |
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Set the channel count. |
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.. method:: audio configuration.getsampfmt() |
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Get the sample format. |
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changeset
|
112 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
113 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
114 |
.. method:: audio configuration.setsampfmt(sampfmt) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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changeset
|
115 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
116 |
Set the sample format. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
117 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
118 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
119 |
.. method:: audio configuration.getfloatmax() |
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|
120 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
121 |
Get the maximum value for floating sample formats. |
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|
122 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
123 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
124 |
.. method:: audio configuration.setfloatmax(floatmax) |
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|
125 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
126 |
Set the maximum value for floating sample formats. |
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|
127 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
128 |
|
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129 |
.. _al-port-objects: |
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|
130 |
|
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131 |
Port Objects |
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132 |
------------ |
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|
133 |
|
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134 |
Port objects, as returned by :func:`openport`, have the following methods: |
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|
135 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
136 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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137 |
.. method:: audio port.closeport() |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
138 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
139 |
Close the port. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
140 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
141 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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142 |
.. method:: audio port.getfd() |
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|
143 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
144 |
Return the file descriptor as an int. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
145 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
146 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
147 |
.. method:: audio port.getfilled() |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
148 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
149 |
Return the number of filled samples. |
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|
150 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
151 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
152 |
.. method:: audio port.getfillable() |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
153 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
154 |
Return the number of fillable samples. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
155 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
156 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
157 |
.. method:: audio port.readsamps(nsamples) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
158 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
159 |
Read a number of samples from the queue, blocking if necessary. Return the data |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
160 |
as a string containing the raw data, (e.g., 2 bytes per sample in big-endian |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
161 |
byte order (high byte, low byte) if you have set the sample width to 2 bytes). |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
162 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
163 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
164 |
.. method:: audio port.writesamps(samples) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
165 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
166 |
Write samples into the queue, blocking if necessary. The samples are encoded as |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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|
167 |
described for the :meth:`readsamps` return value. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
168 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
169 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
170 |
.. method:: audio port.getfillpoint() |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
171 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
172 |
Return the 'fill point'. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
173 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
174 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
175 |
.. method:: audio port.setfillpoint(fillpoint) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
176 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
177 |
Set the 'fill point'. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
178 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
179 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
180 |
.. method:: audio port.getconfig() |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
181 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
182 |
Return a configuration object containing the current configuration of the port. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
183 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
184 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
185 |
.. method:: audio port.setconfig(config) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
186 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
187 |
Set the configuration from the argument, a configuration object. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
188 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
189 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
190 |
.. method:: audio port.getstatus(list) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
191 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
192 |
Get status information on last error. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
193 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
194 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
195 |
:mod:`AL` --- Constants used with the :mod:`al` module |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
196 |
====================================================== |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
197 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
198 |
.. module:: AL |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
199 |
:platform: IRIX |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
200 |
:synopsis: Constants used with the al module. |
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|
201 |
:deprecated: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
202 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
203 |
.. deprecated:: 2.6 |
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|
204 |
The :mod:`AL` module has been deprecated for removal in Python 3.0. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
205 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
206 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
207 |
This module defines symbolic constants needed to use the built-in module |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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|
208 |
:mod:`al` (see above); they are equivalent to those defined in the C header file |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
209 |
``<audio.h>`` except that the name prefix ``AL_`` is omitted. Read the module |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
210 |
source for a complete list of the defined names. Suggested use:: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
211 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
212 |
import al |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
213 |
from AL import * |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
214 |