18 Jun
2010
18 Jun
'10
3:13 a.m.
On 06/18/2010 02:05 AM, Jeremy wrote:
[..]
Anyway, is there any library that provides me with an
array to write to, and
it handles refreshing the screen? That way I would essentially just be
writing to an array, which should be really fast inside the realtime loop.
I thought that is what SDL does, but I guess not.
Jeremy
Not sure where this is going. You started by saying you only needed a
simple debug tool.. but of course it's fun to tinker with SDL. :)
For drawing array-data on screen, pure-data would be a good choice.
Should not take more than 1 min: just open the Pd help for "tabwrite~"
and replace the "phasor~" with "adc~" to feed it with real-time
audio-data.
If you want to stick with SDL, use a jack-ringbuffer (which is basically
an array); the jack-process callback writes into it
and in the main SDL thread: you read from the ring-buffer, plot it,
sleep for 40ms, repeat.
http://das.nasophon.de/jack_oscrolloscope/ is using SDL.
UTSL,
robin