Am Samstag, den 23.05.2009, 05:04 -0700 schrieb warj...@yahoo.com: > discussion started at LAD about changing the jack server latency from the app > called guitarix (like ardour does from its menu JACK -> Latency). Proposed > guitarix patch (by me) works nice against jack2 but not against jack1. See > below. > > Hermann, > > I quickly ran guitarix in debug mode through gdb. You get a crash at > dsp_audio.cpp, line 469. Looks like memory at output[2] and output[3] cannot > be accessed. I tried to understand what you attempt to do but this function > (mydsp::compute) is way to much for me to understand. It looks like some sort > of auto-code ... > > Anyway, output[2] and output[3] are passed in from process() (process > callback function). I believe these arrays should correspond to buffers that > you receive from jack audio ports 2 and 3. However, at the time we try to > change the latency, they are already unregistered because of > DSP.setNumOutputs(). > > So it looks to me that resetting the jack buffer size on the fly from > guitarix badly interacts with how jack1 handled your port deregistration > requests. I don't know why it works with jack2. Running guitarix through gdb > against jack2, I could see that output[2] and output[3] were still valid > memory locations after changing the jack buffer size on the fly. > > This is a bit unfortunate that we get different behaviors when using jack1 or > jack2. I hope you'll sort it out, I don't have more time to spend on it. > > J. > Morning James
So I got it working. Your Code is submit to SVN with some little additions. Thanks James, that is the "first direct code contribution" the guitarix projekt recive, I hope more will follow. :D _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
