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This drops the seq_module= setting in favor of a scenes= setting
in the same style of compose::layers; a nested settings instance
composed of more nested settings instances, one per scene.
A nice side-effect of this change is it no longer uses
til_module_setup_randomize() at all, which was being used to mix
up the seq_module's settings in a pre-nested-settings world.
A new Rocket sync track is introduced named "$context_path:scene"
for selecting which scene to render.
For now all scenes get created @ context create time, and persist
for the entire rkt context lifetime. In the future the context
lifetimes might become explicitly controllable with separate
Rocket tracks used as booleans. This becomes relevant once
modules can make use of existing contexts located within the
stream at their respective context paths. Something necessary
for integrated transitions between scenes using stuff like
fade modules which haven't been added yet.
With this change you can already enumerate a set of scenes in the
rkt settings string, each 100% explicitly configured, and have
Rocket track data select which scene to render on the timeline,
and manipulate the taps at their scene-specific
context-path-derived track names.
In addition to the need for modules picking up existing contexts
on the stream, rkt probably needs a way to interactively
add/remove/modify scenes then spit out the serialized settings
string for the current state of the world.
As these aren't functionalities provided by GNU Rocket, and it's
unclear how receptive upstream GNU Rocket/glrocket maintainers
would be to such additions, rkt will likely first add another
listener for a strictly scenes-editing client to connect
alongside the GNU Rocket stuff. Just something that shows the
current scenes table, and provides a way to edit/add/remove rows
there, with the changes realized in rkt real-time. Then the
Rocket Editor will just continue using the rkt:scene track to
numerically index into this scenes table, without the Rocket
Editor having any visibility or awareness of what's going on in
that table. Probably ok as an initial stab at making demos with
this stack.
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Mechanical change removing some rkt_setup_t* casting verbosity in
rkt_create_context()
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This eliminates the ad-hoc track_name[] allocation and
construction, since the track_name wasn't being used after
getting the track anyways. No point wasting the memory on it,
and the little helper constructing the name on-stack exists now
for another future use @ rkt_create_context().
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Preparatory commit for adding scenes and a $rkt_setup_path:scene
track for selecting them. This will also likely replace the
whole track_name allocation/construction in rkt_pipe_t since we
don't actually make use of that name after getting the track
(except maybe for debugging purposes)
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Mechanical rename just to make this consistent with
til_module_setup()/til_module_setup_finalize()
I should probably do a cleanup pass throughout the til APIs to
standardize on a subject-verb-object or subject-object-verb
order... Things have become a little inconsistent organically
over time
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This changes til_setup_t* from optional to required for
til_module_context_t creation, while dropping the separate path
parameter construction and passing throughout.
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This commit adds passing the settings instance to til_setup_new()
which is used for deriving a path for the setup via
til_settings_print_path() on the supplied settings.
That path gets an allocated copy left in the returned
til_setup_t at til_setup_t.path
This path will exist for the lifetime of the til_setup_t, to be
freed along with the rest of the baked setup instance when the
refcount reaches 0.
The incoming til_settings_t is only read @ til_setup_new() in
constructing the path, no reference is kept. Basically the
til_settings_t* is just passed in for convenience reasons, since
constructing the path needs memory and may fail, this approach
lets the existing til_setup_new() call error handling also
capture the path allocation failures as-is turning
til_setup_new() into a bit more of a convenience helper.
Note that now all code may assume a til_setup_t has a set and
valid til_setup_t.path, which should be useful for context
creates when a setup is available.
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Commit 7c8086020 switched the til_setup_new() api to support NULL
free_func for free().
This mechanical change pivots to that instead of the awkwardly
cast free() parameters.
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This just does the obvious pulling in of til_setup_t, holding the
reference throughout the lifetime of the module context.
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There was a time when it made sense for context creates needing
setups but not receiving them to still be functional with some
sane defaults.
But with recursive settings, we really shouldn't ever have
orphaned nested module uses unreachable by a proper setup.
So let's just get rid of this fallback, and exclusively rely on
the baked setups provided by the .setup() methods. They still
have preferred defaults, and the proper setup production
machinery is what should be responsible for applying those
at runtime where they may also be overridden or otherwise
influenced.
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For recursive settings the individual setting being described
needs to get added to a potentially different settings instance
than the one being operated on at the top of the current
setup_func phase.
The settings instance being passed around for a setup_func to
operate on is constified, mainly to try ensure modules don't
start directly mucking with the settings. They're supposed to
just describe what they want next and iterate back and forth,
with the front-end creating the settings from the returned descs
however is appropriate, eventually building up the settings to
completion.
But since it's the setup_func that decides which settings
instance is appropriate for containing the setting.. at some
point it must associate a settings instance with the desc it's
producing, one that is going to be necessarily written to.
So here I'm just turning the existing til_setting_desc_t to a
"spec", unchanged. And introducing a new til_setting_desc_t
embedding the spec, accompanied by a non-const til_settings_t*
"container".
Now what setup_funcs use to express settings are a spec,
otherwise identically to before. Instead of cloning a desc to
allocate it for returning to the front-end, the desc is created
from a spec with the target settings instance passed in.
This turns the desc step where we take a constified settings
instance and cast it into a non-const a more formal act of going
from spec->desc, binding the spec to a specific settings
instance. It will also serve to isolate that hacky cast to a
til_settings function, and all the accessors of
til_setting_desc_t needing to operate on the containing settings
instance can just do so.
As of this commit, the container pointer is just sitting in the
desc_t but isn't being made use of or even assigned yet. This is
just to minimize the amount of churn happening in this otherwise
mostly mechanical and sprawling commit.
There's also been some small changes surrounding the desc
generators and plumbing of the settings instance where there
previously wasn't any. It's unclear to me if desc generators
will stay desc generators or turn into spec generators. For now
those are mostly just used by the drm_fb stuff anyways, modules
haven't made use of them, so they can stay a little crufty
harmlessly for now.
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Finishes build/fs part of modules/rocket->modules/rkt rename
started in previous commit.
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