Hi Scott,
On Oct 12 2018 17:12, Scott Bahling wrote:
I have tested the branches and it works well. I was able to create daemon in python to interface the FW-1884 with Ardour via the OSC protocol. That's working reliably.
Good to hear ;)
I had to enable quadlets 00-04 since they contain the fader control values. I masked out the solo control values in the same way as the monitor control values since they continuously fluctuate in the same way.
For FW-1082 these quadlets includes value of movable fader as well, however unlike FW-1884 they have fluctuate quirk. So I think it reasonable for us to program this module to ignore them.
Instead, let us program applications so that they call 'hinawa_snd_tscm_get_status()' periodically to get current value of these faders between touch and untouch event on quadlet 05? This take applications to consume CPU time more efficiently than handling many events.
While testing, noticed that the encoder bits on quadlet 06 do not get updated reliably if the encoder knob is moved quickly. The transitions on those bits happen quickly and some of the bit state changes get lost. I switched to using the absolute encoder values on quadlets 10-15 which works reliably.
Yep. We need to ignore some bits in quadlet 06 and 08 for value of the knobs.
Well, as a result, ALSA firewire-tascam driver handles 'edge-trigge' events except for jog wheel and knobs. For this kind of event, it's useful to notify before/after value when emitting notification. So I'd like to change structure passed to UAPI so that:
struct snd_firewire_tascam_control { unsigned int index; - __u32 flags; + __u32 before; + __u32 after; };
Would I request your opinion? You can see patches here: - https://github.com/takaswie/snd-firewire-improve/tree/topic/tascam-userspace... - https://github.com/takaswie/libhinawa/tree/topic/tascam-userspace-take3
You can receive 'control' event of 'HinawaSndTscm' GObject with these two values:
``` def handle_control(self, index, before, after): print('{0:02d}: {1:08x} -> {2:08x}, {3:08x}'.format(index, before, after, after ^ before)) ```
idx before after XOR 09: ffffffff -> 7fffffff, 80000000 09: 7fffffff -> ffffffff, 80000000 06: ffffffff -> ff7fffff, 00800000 06: ff7fffff -> ffffffff, 00800000 07: ffffffff -> ffffff7f, 00000080 07: ffffff7f -> ffffffff, 00000080 10: 00000000 -> 00000001, 00000001 (knob) 10: 00000001 -> 00000002, 00000003 (knob) 15: 003f000c -> 003f000b, 00000007 (jog wheel) 15: 003f000b -> 003f000a, 00000001 (job wheel) 14: 00100005 -> 00110005, 00010000 (knob) 09: ffffffff -> fffffbff, 00000400 09: fffffbff -> ffffffff, 00000400 05: 01ff00a6 -> 017f00a6, 00800000 05: 017f00a6 -> 01ff00a6, 00800000
Thanks
Takashi Sakamoto