* Use `pcmtype` keyword for range
Update methods that accept a `direction` argument (i.e.
capture/playback) to get this via positional _or_ keyword arguments.
Code using keyword arguments can be more robust; however the main reason
for this change is to prepare the way for an extra `units` argument to
many of these methods.
Update documentation to consistently use `pcmtype` instead of
a mixture of that and `direction`.
* Support units
SND_PCM_FORMAT_S24_LE and similar are for 24bit ints packed in 4-bytes each.
There is a similar family of formats for 3-bytes packed data (as stored in 24bit wave files).
This commit:
- adds S24_3LE, S24_3BE, U24_3LE, U24_3BE PCM formats to the alsaaudio.c
- updates documentation
- updates playwav.py to correctly play typical 24Bit PCM wave files
Closes#38
- Avoid internal re-opening of PCM objects when parameters change.
- PCM objects can be opened by card id
- Mixer objects can be openend by card index
(this is not consistent, but ALSA works this way)
- Adjusted and cleaned up documentation.
git-svn-id: svn://svn.code.sf.net/p/pyalsaaudio/code/trunk@26 ec2f30ec-7544-0410-870e-f70ca00c83f0
