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2023-07-04til_module_context: untap early in module_context_free()Vito Caputo
This was a UAF bug when the context being freed contained a driving tap... just careless placement of the untap call. It needs to occur before destroying the context, because module contexts are often used to store the til_tap_t instances.
2023-07-04til: make til_modlue_setup() nested usage awareVito Caputo
When setting up a nested module, the HERMETIC modules shouldn't be considered as eligible nor should one be the preffered option (rtv). This uses the presence of a parent on the settings as a heuristic for if it's a nested scenario (no parent == root). When nested the default changes to "compose" from "rtv", and HERMETIC modules are omitted from the listed values.
2023-07-04til: optionally finalize in til_module_setup()Vito Caputo
This was assuming non-NULL res_setup which would assert in til_module_setup_finalize() which doesn't expect a NULL res_setup since that's its entire purpose. It's not a bug that was actually triggered by any callers (yet)
2023-07-04til_stream: add missing include stdio for FILE*Vito Caputo
trivial change
2023-07-04til_str: mechanical rename s/seed/string/Vito Caputo
I get why I called this seed at the time as it was the starting string of a potentially larger buildup... but it's just ambiguous naming with the other more descriptive uses of seed in the tree, and isn't even really appropriate.
2023-07-04til_settings: add way to change the settings labelVito Caputo
In rkt_scener it's desirable to fully construct a new settings instance *before* wiring it into the parent rkt/scenes settings. But the way these positional settings labels get constructed depends on the parent's settings entries. So it becomes a chicken-egg problem to require the proper label @ creation before its containing setting is even added in the parent's entries. With this change a temporary WIP label can be used while constructing the settings instance, then amend it once we know the settings instance is complete and ready to join the party.
2023-07-04til_settings: add ability to get at settings parentVito Caputo
Introduce til_settings_get_parent(), impetus being so til_module_setup() can infer if it's hermetic-appropriate or not.
2023-07-04til_str: exclude \0 from res_len for til_str_buf()/til_str_to_buf()Vito Caputo
It's more ergonomic more often to behave consistently with strlen() here, plus it's just the established mental model. While here I made til_settings_path_as_buf() private as nothing external uses it, it's essentially just a logically distinct private helper function from the public wrappers around it. Dragged into this changeset due to clarifying some naming/semantics as it's one of the few til_str_to_buf() callers. But nobody was actually passing a non-NULL res_bufsz/res_len to it anyways, as its use is minimal.
2023-07-04til_str: introduce til_str_chomp()Vito Caputo
Helper for trimming off a trailing CRNL or NL if present Clearly I once knew perl if this is the name that came to mind
2023-07-04til_str: fix va_start/va_end usage in til_str_newf()Vito Caputo
You can't just reuse the ap in multiple calls to vsnprintf without restarting... fixed in the obvious way
2023-07-04modules/rkt: discretize rkt_context_t.scenes[]Vito Caputo
Make this a distinct heap allocation so it can be enlarged when editing the scenes... (preparatory commit for scenes editing)
2023-06-24modules/rkt: move rkt types to a headerVito Caputo
Preparatory commit for adding an interactive scene editing server of sorts. It'll go in a separate listing, but needs these types as it'll operate on rkt_context_t->scenes[].
2023-06-24til_fb: trivial struct indentation fixupVito Caputo
I think this got messed up in the shift to libtil
2023-06-24sdl_fb: keep spare pages on free listVito Caputo
See previous commits re: drm_fb/mem_fb
2023-06-23sdl_fb: quit on ESC keypressVito Caputo
Let's some a more user-friendly ways of exiting...
2023-06-23til_fb: prevent 0-height slicesVito Caputo
til_fb_fragment_slice_single() and indirectly til_fragmenter_slice_per_cpu() could get into infinite loops when slicing small fragments into many slices. This became more likely with commit a2f7397 which increased per_cpu slice counts by 16X, which is how I tripped over it running rtv. A checkers,size=8,fill_module=moire sent things spinning... This commit prevents it in the obvious manner.
2023-06-19drm_fb: keep spare pages on a free listVito Caputo
See previous commit re: mem_fb
2023-06-19mem_fb: keep spare pages on a free listVito Caputo
Snapshotting made page alloc/free more frequent, and modules/mixer really hammers on snapshots in fade mode... drizzle as well, but mixer snapshots both module outputs per frame. So by keeping these around the reclaimed page snapshots can be held onto at within the fb as spares for quicker allocation. In practice it should just hit a high water mark of a working set for spare pages, once in a steady state, assuming snapshots aren't leaking. Future commits will replicate this change in {drm,sdl}_fb
2023-06-19til: use 16 * n_cpus in til_fragmenter_slice_per_cpu()Vito Caputo
Slight improvement of CPU utilization for fragmenters using this strategy... I noticed tile64 would give better FPS in some scenarios where it seemed obvious slice_per_cpu() was the appropriate option. And that turned out to just be by virtue of being able to give idle threads something to do while busy ones finished what was on their plate. So just make the slices a bit more granular than n_cpus... this may have to be revisited in the future to find the sweet spot, and may need to be more sophisticated than just multiplying by a constant factor.
2023-06-16modules/moire: lose unnecessary branch in inner loopVito Caputo
I had benchmarked this change and it showed no difference at all on my 2c/4c i7 X230. But having just tried it on an RPi4B where it moved the test case from 54FPS to 60FPS, a +10% improvement, it's worth the readability loss. It's interesting how Intel's cleverness discourages optimizing in ways that benefit probably *all* the competition... even when the optimization is such a minor change in terms of effort.
2023-06-16modules/moire: some simple optimizationsVito Caputo
Major gain comes from eliminating the cosf() from the inner loop... There's still a bunch left on the table for moire but even just these changes turn 19FPS into 81FPS over here for: '--module=compose,layers=moire\\\,centers\\\=2\,moire\\\,centers\\\=2\,moire\\\,centers\\\=2\,moire\\\,centers\\\=2,texture=none' '--video=mem,size=1366x768'
2023-06-15modules/rkt: drop vestigial TODO comment about handlesVito Caputo
This was written when module names were going to have an @/path/to/context "handle" syntax. But instead I went the "ref" builtin module route, with path=/path/to/context as a setting. While it's more verbose in the settings, it "just works" everywhere that can take a module+settings because the ref builtin is just another module like any other. So this TODO is referring to something that won't happen in a "ref" builtin world.
2023-06-15modules/rkt: end the stream on scene 99999Vito Caputo
This conditionally will end the stream on scene 99999 if connect=off (playback mode) When connect=on it'll just make it show an "EXIT SCENE" diagnostic instead of the "NO SCENE" message. Now you just stick 99999 in the rkt:scene track to end the show. It's assumed 99999 scenes will never be needed...
2023-06-15main: quit when the stream endsVito Caputo
I can't see this staying so simple for very long, but for now this at least enables making rototiller-based rkt-sequenced demos that exit gracefully when they're finished. In a future where rtv may play embedded rkt configs+tracks, it needs a way to detect the end of stream without making main exit. But I'll cross that bridge when I get there...
2023-06-15til_stream: introduce til_stream_{end,active}()Vito Caputo
rkt needs a way to signal the end of a sequence, this will probably get more work in the future but something simple is fine for now
2023-06-15modules/stars: quick n dirty ticks-based dt scaling of movementVito Caputo
This probably needs more work... it seems wrong to be bypassing the taps altogether when dt is 0
2023-06-15til_module_context: s/ticks/last_ticks/ in contextVito Caputo
And just maintain it as the last ticks value after rendering with the context... A couple modules were already doing this manually in an ad-hoc fashion, just make it a general thing. Updated those modules to reflect the new situation Especially in a rkt world with modules::mixer doing fades, it becomes common to render the same context twice in the same frame for the blending. We need to prevent accelerated animations in such situations. For now let's just rely on ticks in a delta-T fashion to prevent animating the context when ticks is the same. modules::stars in particular needs this fixed up, upcoming commit
2023-06-15modules/mixer: update taps @ context create tooVito Caputo
This moves the tap updating to a function shared by rendering and context create... so we can have a valid externally-driven tap value before rendering a single frame if possible. (this is important for not having spurious frames/flickers in rkt sequences)
2023-06-15modules/rkt: handle stream taps @ context createVito Caputo
It's problematic getting this stuff online at render time, because the modules end up rendering with uninitialized tap values in that first frame. With this change modules can get their taps on-stream at context create, and we'll notice and do the initial rocket update just before returning the rkt context to prime everyone on-stream.
2023-06-14modules/mixer: mildly optimize the faderVito Caputo
This really needs SIMD to fly on-cpu, but this improves things some. Using `--module=mixer,style=fade,a_module=roto,b_module=roto\ --video=mem,size=1366x768 --defaults --go` to test: Before FPS: 92-95 floating mostly around 94-95 After FPS: 107-111 floating mostly around 108-109 so +14.8% FPS (2c/4t i7 X230)
2023-06-14modules/mixer: update T tap once in prepare_frameVito Caputo
It's problematic/racy to always be dereferencing the tap pointer to access it's current value. Running checkers:fill_module=mixer on a 2c/4t (n_cpus=4) machine was quite effective at crashing in mixer::render_fragment() due to dereferencing a NULL snapshot fragment. The "tween" T value is being used to indicate when interpolation of the snapshots is necessary. But repeatedly re-reading the T value via the tap pointer would race with the driving tap. In the case of checkers, which is a threaded module, the mixer contexts are all rendering in parallel at the same path so they're sharing a single pipe for their T taps. This situation of sets of contexts sharing a single path, resulting in their taps all landing on a single pipe, is still largely up in the air and might be actively prevented in the future. But until then, it can be made far less crashy and problematic by just being more careful about dereferencing the tap to access its latest value just once at the prepare frame stage, storing it in the local T variable in the context. Then all the render_fragment() accesses can at least find a stable value in the context from prepare-to-render, so at least the snapshots are there when they should be according to the T value etc. Something like this will probably need to be done regardless of what happens with the context sets sharing the same path. Since when a given tap isn't the driver, it still has to take care to just grab the updated value once for the frame... The tap API can't really automagically do that single update of the local variable when passenger though, since it's been deliberately kept devoid of all the type-specific accessor junk (ptr/elems etc are all void **/void* in the tap api side). Hence why this commit is just ad-hoc updating the local variable in the else branch; it's best positioned to do so directly. But there still needs to be more consideration for thread-safety.
2023-06-14til_fb: apply fragment->y in til_fb_fragment_slice_single()Vito Caputo
this was breaking mixer as checkers::fill_module when the checkers were centered via shifting on the Y axis
2023-06-14modules/roto: trivial simplification of render loopVito Caputo
Maybe earlier versions used the absolute coordinates in the frame, but the current code doesn't make use of this and simply needs to confine itself into the WxH of the fragment.
2023-06-13modules/mixer: add a fade style, make defaultVito Caputo
This is not optimized at all and tends to hurt the FPS significantly. This is one of those things that would hugely benefit from SIMD, but even without SIMD it could be done better. I just slapped together something obvious for now, as I'd like to focus more on the rkt side but need a better fader for scene transitions than style=flicker. Also changed {a,b}_module= preferred values to blank,compose so you see something happen if you just run --defaults. Otherwise, the compose,compose would just fade between two identical compositions invisibly.
2023-06-13modules/mixer: replace inputs= with {a,b}_module=Vito Caputo
Originally I was thinking a variadic inputs= like compose::layers would be desirable, with the T value's integer serving as an index into the inputs, and the fraction between the integers as the mixing T. But I changed my mind and am instead constraining mixer explicitly to two distinctly named modules; a_module= and b_module= with the T value 0-1 mapping to a-b.
2023-06-13modules/checkers: return -EINVAL on invalid module nameVito Caputo
Not sure why this was -ENOMEM, module lookups don't allocate anything...
2023-06-13til: til_module_setup() needs to finalize when no .setup()Vito Caputo
Commit 24911280 made til_setup_t required, and most setup code has already adopted til_module_setup_finalize() added in c94e4683 for this purpose. But til_module_setup()'s fall-through case when there's no til_module_t.setup() on the module being setup was missed. This broke running simple modules without a .setup() directly like --module=roto, oops. Fix is simple.
2023-06-13*: smattering of random small fixes to silence -WallVito Caputo
I thought the build was already using -Wall but that seems to not be the case, maybe got lost somewhere along the line or messed up in configure.ac After forcing a build with -Wall -Werror, these showed up. Fixed up in the obvious way, nothing too scary.
2023-06-13modules/checkers: introduce clear=,clear_color= settingsVito Caputo
Similar to fill= and fill_color=, these influence how to treat the "clear" cells. Until now "clear" cells would unconditionally just be cleared via til_fb_fragment_clear(). Now they can also be filled w/color,sampled,textured, and maybe in the future a clear_module= will also be introduced. Note that for now I've left the clear_color randomizer disabled, see code comments. Having this setting also makes me wonder if the "filled" cells should be optionally cleared using the "clear" setting first. Imagine a scenario where you have fill_module=shapes, and you want the color around the shape to match the clear color, for instance... Especially once you can pass a color down to the fill_module, controlling these things becomes more critical. There's definitely more work to do here.
2023-06-13modules/checkers: prefix fill_ to fill color+flagsVito Caputo
Preparatory commit for introducing equivalents for the "clear" cells. This renamed the color= setting to fill_color=, in addition to the internal naming.
2023-06-12til_settings: convert til_settings_new() to til_str_tVito Caputo
open_memstream() be gone
2023-06-12til: register contexts on-stream @ create timeVito Caputo
Module contexts are now discoverable via the stream a la til_stream_find_module_contexts(). The current architecture has the stream adding a reference to all the contexts registered. So even if they get unreferenced by their creators, they will linger on-stream. There's a gc mechanism til_stream_gc_module_contexts() which can be used to trigger a cleanup of contexts _only_ referenced by the stream. It's unclear as of yet if this is the way to go long-term, but it lets things work for now and allows some iterating and experimentation to see where to go next.
2023-06-12modules/rtv: gc module contexts on channel switchVito Caputo
This probably needs more work, but this at a minimum should prevent us from leaking contexts in the stream at the myriad paths we construct them at. Context registration replaces what's at the existing path, but rtv produces all sorts of setup paths, and I haven't added any explicit unregistration of contexts at this time. That might change, but for now let's just use this gc mechanism even if it's a temporary hack.
2023-06-12til_args: introduce --print-module-contextsVito Caputo
Some rudimentary instrumentation for monitoring the active module contexts alongside the pipes You probably want to redirect stderr to a file when using --print-pipes and/or --print-module-contexts... e.g. ``` rototiller --defaults --go --print-pipes --print-module-contexts 2>/dev/null ``` or, if you still want to monitor FPS or log_channels=on in rtv, 2>/file/to/tail then tail -F /file/to/tail in another terminal.
2023-06-12til_setup: replace memstream use with til_str_tVito Caputo
Just more open_memstream() elimination
2023-06-12til: introduce "ref" built-in moduleVito Caputo
This opens up the possibility of referencing contexts on-stream by-path anywhere a module may be used: ref,path=/path/to/existing/context Currently the path lookup is performed @ render time, and a reference is taken on the context found there on the first time it's located. That reference is then held in the ref's context until its context is destroyed. There are more details to flesh out, and what probably needs to happen is some til_stream API for maintaining the reference in the event that the context at that path gets replaced. Due to refcounting, the referenced context will persist even if the stream-resident instance goes away, but there should probably be a way for that replacement to invalidate the existing references so they replace theirs with a fresh lookup at the path... Either way this is a good start. With this addition you can effectively implement scene transitions in rkt, via the mixer module, something like (sans proper escaping): mixer,a_module=ref\,path=/foo/previous/ctxt,b_module=ref\,path=/foo/next/ctxt
2023-06-12til_stream: introduce on-stream registered contextsVito Caputo
In order for modules like rkt to be able to do integrated transitions, there must be a way for discovering existing module contexts by path and using them for rendering in new compositions. This is a first stab at something along those lines. The whole multiple contexts at the same path pattern has been partially handled in this implementation, but I think it will just be going away and checkers::fill_module refactored to not do that.
2023-06-12til_settings: pivot settings path printing to til_strVito Caputo
This eliminates more open_memstream() usage in favor of the new til_str stuff. While here I've split up the path construction API exposing the til_str oriented variants, rather than only providing a FILE*-oriented API. This way you just use the FILE* stuff when convenient (like printing to stdout/stderr) and go til_str_t when you're building up a buffer. Such is life in a sans-open_memstream-world. Also while here the FILE*-oriented settings path printers were renamed s/print/fprint/g hence touching setup.c
2023-06-12til_module_context: refcount module contextsVito Caputo
This becomes necessary in a world with externall-discoverable-on-stream-contexts that can be arbitrarily referenced by other contexts. There will probably be more complexity necessary for invalidating references, but this is a start.
2023-06-12til_settings: migrate til_settings_as_arg() to til_strVito Caputo
First elimination of open_memstream() usage...
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