[LAD] Deciphering jack-smf-utils -- Jack MIDI stuff
ingeniousnebbish at cox.net
Mon Feb 18 13:35:32 UTC 2013
On Sunday 17 February 2013 08:21:51 Paul Coccoli wrote:
> On Sat, Feb 16, 2013 at 10:33 PM, M Donalies <ingeniousnebbish at cox.net>
> > process_callback() calls process_midi_output(), wherein we find:
> > port_buffer = jack_port_get_buffer(output_port, nframes);
> > Why the nframes parameter? Is there a separate buffer area for each
> > frame?
> There's a separate buffer for each port.
Yes, and that's the output_port arg, but what's with nframes? Why isn't the
function simply: jack_port_get_buffer(output_port) ?
> > A little later in the same function we have:
> > last_frame_time = jack_last_frame_time(jack_client);
> > Is this the time of the end of the last process cycle?
> Not sure about this one. The docs say: "the precise time at the start
> of the current process cycle" which should be the same time as the
> start of the current process cycle, I would think.
Oh, I get it. I was reading "last" as "previous" as in currentCycle - 1.
More information about the Linux-audio-dev