modules/rtv: don't use n_cpus=0 for the context creates

This is harmless as long as rtv stays hermetic.

But if rtv gets used in a composite scenario in the future by
either removing the hermetic flag, or allowing forced overrides,
n_cpus=0 will cause the nested module contexts to become threaded
on SMP machines.

That's problematic if the outer module context is already a
threaded render.  What's appropriate here is to just propagate
the n_cpus down so if an upper layer has already gone threaded,
it will be sending down n_cpus=1 to serialize the nested
instances.

In practice, as-is, this change basically changes nothing, but
prepares for a potential future where rtv participates in
threaded compositions.

Through a lens of "rtv just rejiggers scenes and there settings
on a timer from a settings-specified subset of modules and
settings" it's arguably useful as just another module.  Sometimes
you want something to change itself up periodically in say a
compose layer.

So preparing for this possibility isn't really all that
far-fetched/hypothetical.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/modules/rtv/rtv.c b/src/modules/rtv/rtv.c
index 8648ea3..6255a60 100644
--- a/src/modules/rtv/rtv.c
+++ b/src/modules/rtv/rtv.c
@@ -195,7 +195,7 @@ static void setup_next_channel(rtv_context_t *ctxt, unsigned ticks)
 	}
 
 	if (!ctxt->channel->module_ctxt)
-		(void) til_module_create_context(ctxt->channel->module, ctxt->til_module_context.stream, rand_r(&ctxt->til_module_context.seed), ticks, 0, ctxt->til_module_context.path, ctxt->channel->module_setup, &ctxt->channel->module_ctxt);
+		(void) til_module_create_context(ctxt->channel->module, ctxt->til_module_context.stream, rand_r(&ctxt->til_module_context.seed), ticks, ctxt->til_module_context.n_cpus, ctxt->til_module_context.path, ctxt->channel->module_setup, &ctxt->channel->module_ctxt);
 
 	ctxt->channel->last_on_time = now;
 }
@@ -257,7 +257,7 @@ static til_module_context_t * rtv_create_context(const til_module_t *module, til
 		((rtv_setup_t *)setup)->snow_module_setup = NULL;
 
 		ctxt->snow_channel.module = til_lookup_module(((rtv_setup_t *)setup)->snow_module_name);
-		(void) til_module_create_context(ctxt->snow_channel.module, stream, rand_r(&seed), ticks, 0, path, ctxt->snow_channel.module_setup, &ctxt->snow_channel.module_ctxt);
+		(void) til_module_create_context(ctxt->snow_channel.module, stream, rand_r(&seed), ticks, n_cpus, path, ctxt->snow_channel.module_setup, &ctxt->snow_channel.module_ctxt);
 	}
 
 	ctxt->log_channels = ((rtv_setup_t *)setup)->log_channels;