Deprecated since version 2.6: The al module has been deprecated for removal in Python 3.0.
This module provides access to the audio facilities of the SGI Indy and Indigo workstations. See section 3A of the IRIX man pages for details. You’ll need to read those man pages to understand what these functions do! Some of the functions are not available in IRIX releases before 4.0.5. Again, see the manual to check whether a specific function is available on your platform.
All functions and methods defined in this module are equivalent to the C functions with AL prefixed to their name.
Symbolic constants from the C header file <audio.h> are defined in the standard module AL, see below.
The current version of the audio library may dump core when bad argument values are passed rather than returning an error status. Unfortunately, since the precise circumstances under which this may happen are undocumented and hard to check, the Python interface can provide no protection against this kind of problems. (One example is specifying an excessive queue size — there is no documented upper limit.)
The module defines the following functions:
The name and direction arguments are strings. The optional config argument is a configuration object as returned by newconfig(). The return value is an audio port object; methods of audio port objects are described below.
The return value is a new audio configuration object; methods of audio configuration objects are described below.
The device argument is an integer. The return value is a list of integers containing the data returned by ALqueryparams().
The device argument is an integer. The list argument is a list such as returned by queryparams(); it is modified in place (!).
The device argument is an integer. The list argument is a list such as returned by queryparams().
Configuration objects returned by newconfig() have the following methods:
Return the queue size.
Set the queue size.
Get the sample width.
Set the sample width.
Get the channel count.
Set the channel count.
Get the sample format.
Set the sample format.
Get the maximum value for floating sample formats.
Set the maximum value for floating sample formats.
Port objects, as returned by openport(), have the following methods:
Close the port.
Return the file descriptor as an int.
Return the number of filled samples.
Return the number of fillable samples.
Read a number of samples from the queue, blocking if necessary. Return the data as a string containing the raw data, (e.g., 2 bytes per sample in big-endian byte order (high byte, low byte) if you have set the sample width to 2 bytes).
Write samples into the queue, blocking if necessary. The samples are encoded as described for the readsamps() return value.
Return the ‘fill point’.
Set the ‘fill point’.
Return a configuration object containing the current configuration of the port.
Set the configuration from the argument, a configuration object.
Get status information on last error.
Deprecated since version 2.6: The AL module has been deprecated for removal in Python 3.0.
This module defines symbolic constants needed to use the built-in module al (see above); they are equivalent to those defined in the C header file <audio.h> except that the name prefix AL_ is omitted. Read the module source for a complete list of the defined names. Suggested use:
import al from AL import *