With which plugin? Plugins which use the channel as a note differentiator (and many of the u-he ones today do this) will act that way if you don’t have a note channel rotator. Plugins which use the note id as the differentiator (like the clap saw demo and surge) will not.
CLAP: The New Audio Plug-in Standard (by U-he, Bitwig and others)
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- KVRian
- 874 posts since 25 Dec, 2018
- KVRian
- 1260 posts since 31 Dec, 2008
Mine. I think I figured it out. I had to use the VOICE_INFO extension with the CLAP_VOICE_INFO_SUPPORTS_OVERLAPPING_NOTES flag. Looks like its working now.
www.solostuff.net
Advice is heavy. So don’t send it like a mountain.
Advice is heavy. So don’t send it like a mountain.
- KVRian
- 1260 posts since 31 Dec, 2008
What do you use for time when you send\record automation to the host ?
Please don't get me wrong here. I know what time means and I know how to receive modulation/automation events from the host and play them in a sample accurate fashion. Thats not what I'm asking.
Code: Select all
clap_event_param_value_t *pcev = (clap_event_param_value_t *) &cev;
pcev->header.size = sizeof(clap_event_param_value_t);
pcev->header.time = ??????;
pcev->header.space_id = CLAP_CORE_EVENT_SPACE_ID;
pcev->header.type = (uint16_t)CLAP_EVENT_PARAM_VALUE;
pcev->header.flags = 0;
pcev->param_id = index;
pcev->value = value;
Please don't get me wrong here. I know what time means and I know how to receive modulation/automation events from the host and play them in a sample accurate fashion. Thats not what I'm asking.
www.solostuff.net
Advice is heavy. So don’t send it like a mountain.
Advice is heavy. So don’t send it like a mountain.
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- KVRist
- 36 posts since 24 Jun, 2022
Just use 0 if you don't already have a specific timestamp for the automation event (e.g. if you're just sending automation as a result of the user dragging a knob in the GUI).S0lo wrote: ↑Wed Aug 24, 2022 3:20 pm What do you use for time when you send\record automation to the host ?
Code: Select all
clap_event_param_value_t *pcev = (clap_event_param_value_t *) &cev; pcev->header.size = sizeof(clap_event_param_value_t); pcev->header.time = ??????; pcev->header.space_id = CLAP_CORE_EVENT_SPACE_ID; pcev->header.type = (uint16_t)CLAP_EVENT_PARAM_VALUE; pcev->header.flags = 0; pcev->param_id = index; pcev->value = value;
Please don't get me wrong here. I know what time means and I know how to receive modulation/automation events from the host and play them in a sample accurate fashion. Thats not what I'm asking.
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- KVRian
- 874 posts since 25 Dec, 2018
Exactly; And "time" is "sample offset from start of process block" so "0" means "at start of block" and "frame count - 1" means end and so on.
I also use the convention that if I don't know I pick 0.
I also use the convention that if I don't know I pick 0.
- KVRian
- 1260 posts since 31 Dec, 2008
When sending SysEx dumps to the host (via clap_event_midi_sysex_t). How long is the plugin expected to hold that dump buffer in memory before it can assume that the host has already processed it? Can we assume that say by the time the host calls the next proccess() that we can free those buffers?
Or is the host required to actually copy the dumps to it's own memory once try_push() is called?
Or is the host required to actually copy the dumps to it's own memory once try_push() is called?
www.solostuff.net
Advice is heavy. So don’t send it like a mountain.
Advice is heavy. So don’t send it like a mountain.
- KVRian
- 520 posts since 12 Apr, 2010 from The Netherlands
I would assume that the host is required to copy the data, and I guess the same goes the other way around (i.e. when receiving SysEx from the host the plugin is required to copy the data).
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Christian Schüler Christian Schüler https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=48996
- KVRist
- 266 posts since 23 Nov, 2004 from Hamburg, Germany
I'm sorry that's it. If the API is not using Allmann sytle braces I can't legally use it... /s
Seriously though, I read through the thread and what do people have against CMake? It's the worst meta-build tool out there, except all the others that are even worse. At least CMake sees good support.
I already have an internal API-abstraction layer in my plugin but it is heavily geared towards VST2 because that's the one that ever got implemented. But if CLAP is similar, then it shouldn't be difficult to add support. Besides, I'm use the raw aeffect.h, I never used the provided C++ wrappers that for me didn't add any value, so structs and function pointers is all I need.
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Christian Schüler Christian Schüler https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=48996
- KVRist
- 266 posts since 23 Nov, 2004 from Hamburg, Germany
Not necessarily. They just want to stew in their own juices for as much as possible.DJMaytag wrote: ↑Tue Jul 05, 2022 12:24 pmEach of those devs want to make their format standard.adammonroe wrote: ↑Sat Jun 18, 2022 9:20 pmHowever:
*Cubase never adopted the AU format.
*Logic never adopted VST.
*Avid does not support anything besides AAX.
- KVRAF
- 7957 posts since 12 Feb, 2006 from Helsinki, Finland
Probably the biggest difference for a simple plugin is that CLAP handles parameter automation as part of the event stream, both in and out of plugin and if you have an architecture where the GUI sends events directly to host, then you need a bit of glue to queue them such that you can flush them to host from the audio process callback (or flush callback when not processing).Christian Schüler wrote: ↑Sat Sep 24, 2022 3:32 pm I already have an internal API-abstraction layer in my plugin but it is heavily geared towards VST2 because that's the one that ever got implemented. But if CLAP is similar, then it shouldn't be difficult to add support. Besides, I'm use the raw aeffect.h, I never used the provided C++ wrappers that for me didn't add any value, so structs and function pointers is all I need.
Other than that, I don't know if it's really "similar" to VST2, but it's really an API and not a framework, so I don't see how it'd matter too much what your plugin works internally. Support for CLAP exclusive features might require some architectural changes depending on how your plugins are built, but feature parity with VST2 should not be terribly difficult.
- KVRian
- 1260 posts since 31 Dec, 2008
It makes sense to think so. But just in case, since this doesn't seam to be explicitly stated (yet), I already implemented some precautions, waiting until the next event(s) are sent before freeing the dumps. This will at least wait for the next proccess() call. Usually more.
www.solostuff.net
Advice is heavy. So don’t send it like a mountain.
Advice is heavy. So don’t send it like a mountain.
- u-he
- 28113 posts since 8 Aug, 2002 from Berlin
Why not ask in the Github discussion section? That's where Alexandre, Paul and Robbert hang out. If the documentation is missing something, that's how it gets fixed...
- KVRAF
- 7957 posts since 12 Feb, 2006 from Helsinki, Finland
CLAP is a well specified API. In general when a well specified API doesn't explicitly mention that you need to keep some data alive, it should be perfectly safe to assume that a copy is made.S0lo wrote: ↑Sun Sep 25, 2022 9:21 amIt makes sense to think so. But just in case, since this doesn't seam to be explicitly stated (yet), I already implemented some precautions, waiting until the next event(s) are sent before freeing the dumps. This will at least wait for the next proccess() call. Usually more.
- KVRian
- 1260 posts since 31 Dec, 2008
heh, I'dont know. good point. They were kind enough to reply here so I got hooked to this thread
www.solostuff.net
Advice is heavy. So don’t send it like a mountain.
Advice is heavy. So don’t send it like a mountain.
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- KVRian
- 874 posts since 25 Dec, 2018
GitHub triggers notifications for me; kvr does not. So it’s really a latency question
And yeah make a copy if you want it to be longer lived than the call and it’s a const event *. I think that was your question right?