14.4.1 AU_read Objects
AU_read objects, as returned by open() above, have the
following methods:
- close ()
-
Close the stream, and make the instance unusable. (This is
called automatically on deletion.)
- getnchannels ()
-
Returns number of audio channels (1 for mone, 2 for stereo).
- getsampwidth ()
-
Returns sample width in bytes.
- getframerate ()
-
Returns sampling frequency.
- getnframes ()
-
Returns number of audio frames.
- getcomptype ()
-
Returns compression type.
Supported compression types are
'ULAW', 'ALAW' and 'NONE'.
- getcompname ()
-
Human-readable version of getcomptype().
The supported types have the respective names
'CCITT G.711
u-law', 'CCITT G.711 A-law' and 'not compressed'.
- getparams ()
-
Returns a tuple
(nchannels, sampwidth,
framerate, nframes, comptype, compname),
equivalent to output of the get*() methods.
- readframes (n)
-
Reads and returns at most n frames of audio, as a string of bytes.
- rewind ()
-
Rewind the file pointer to the beginning of the audio stream.
The following two methods define a term ``position'' which is compatible
between them, and is otherwise implementation dependant.
- setpos (pos)
-
Set the file pointer to the specified position.
- tell ()
-
Return current file pointer position.
The following two functions are defined for compatibility with the
aifc, and don't do anything interesting.
- getmarkers ()
-
Returns
None.
- getmark (id)
-
Raise an error.
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