19. Dezember 2016 11:35 Uhr, hollundertee@xxxxxxx schrieb: > On Wed, 16 Nov 2016 07:04:04 +0000 > holger@xxxxxxxxxxxxx wrote: > >> Hi lista :) >> >> Using an i3 (https://i3wm.org/docs/userguide.html#exec) >> shortcut, I can control my jack transport from everywhere, even when >> no jack application has focus : >> >> bindsym $mod+p exec echo play | jack_transport >> bindsym $mod+Shift+p exec echo stop | jack_transport >> >> Thanks to FalkTX for the pipe trick BTW, I saw that on >> linuxmusicians ; This is very cool if you have some sort of wireless >> keyboard, but as you can see it's two different keystrokes, how do I >> make it so toggles play/pause? Alternatively, how do I know when >> jack transport is rolling, so I can hack my way into making my own >> toggle script? I did my homework and read the inline --help of all >> the available jack commands on my machine : With this patch, >> jack_transport should be able to toggle. I will suggest it to the >> jack-develop list but would be happy if some else can test it. Holger >> >> ----------------- >> >> diff --git a/example-clients/transport.c b/example-clients/transport.c >> index c543b41..0b1130f 100644 >> --- a/example-clients/transport.c >> +++ b/example-clients/transport.c >> @@ -211,6 +211,29 @@ static void com_timeout(char *arg) >> jack_set_sync_timeout(client, (jack_time_t) (timeout*1000000)); >> } >> +/* Set sync timeout in seconds. */ >> +static void com_toggle(char *arg) >> +{ >> + jack_position_t current; >> + jack_transport_state_t transport_state; >> + >> + transport_state = jack_transport_query (client, ¤t); >> + >> + switch (transport_state) { >> + case JackTransportStopped: >> + com_play( arg ); >> + break; >> + case JackTransportRolling: >> + com_stop( arg ); >> + break; >> + case JackTransportStarting: >> + printf ("state: Starting - no transport toggling"); >> + break; >> + default: >> + printf ("state: Unknown - no transport toggling"); >> + } >> +} >> + >> /* Command parsing based on GNU readline info examples. */ >> @@ -238,6 +261,7 @@ command_t commands[] = { >> {"stop", com_stop, "Stop transport"}, >> {"tempo", com_tempo, "Set beat tempo "}, >> {"timeout", com_timeout, "Set sync timeout in "}, >> + {"toggle", com_toggle, "Toggle transport rolling"}, >> {"?", com_help, "Synonym for `help'" }, >> {(char *)NULL, (cmd_function_t *)NULL, (char *)NULL } >> }; > > Thanks guys, > > I was just browsing the list for nice Linux Audio music when I found > this thread, which is just what I needed as well :) > In my case the purpose is for screencasts. > I plan to record the screen using SimpleScreenRecorder and audio > through jack into Ardour or somesuch. The problem I had was that if I > start SSR and Ardour separately I need to manually align A/V later. It > is simpler if A/V starts at the same time. > > I was thinking of starting jack transport through qjackctl or somesuch, > using the CLI did not occur to me. > > SSR lacks jack transport control, but I think assigning the same hotkey > to SSR and jack transport should work just fine. I guess I still need > to take the alsa/jacks latency into account, but at least that should > be small and constant. > > Does anyone have a better idea? > > @Holger: Thanks, but patching a jack example client requires > maintenance since this change would be lost with each new jack package > coming through the repo. > > Regards, > Philipp > > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/listinfo/linux-audio-user I know, I know... that's why I wanted to send it to the Jack list to get it applied... I still did not do it sorry. Will try to send it this evening... Holger _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
