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.