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authorVito Caputo <vcaputo@pengaru.com>2023-08-29 16:24:01 -0700
committerVito Caputo <vcaputo@pengaru.com>2023-08-29 16:24:01 -0700
commit124004e84b276cd9e1b98910c135d91ebcabaf91 (patch)
tree2727f5b51ada20498dd7c1f1bf83d50f4713cb73 /src/modules
parent12cc817baa17ddf8dde55b5f34f38432225bc1e8 (diff)
modules/strobe: tap hz value
This enables dynamic external control of the strobe's frequency.
Diffstat (limited to 'src/modules')
-rw-r--r--src/modules/strobe/strobe.c38
1 files changed, 37 insertions, 1 deletions
diff --git a/src/modules/strobe/strobe.c b/src/modules/strobe/strobe.c
index 76ce260..789899a 100644
--- a/src/modules/strobe/strobe.c
+++ b/src/modules/strobe/strobe.c
@@ -6,6 +6,8 @@
#include "til.h"
#include "til_fb.h"
#include "til_module_context.h"
+#include "til_stream.h"
+#include "til_tap.h"
/* Dead-simple strobe light, initially made to try simulate this contraption:
* https://en.wikipedia.org/wiki/Dreamachine
@@ -30,11 +32,34 @@ typedef struct strobe_context_t {
til_module_context_t til_module_context;
strobe_setup_t *setup;
unsigned last_flash_ticks;
+
+ struct {
+ til_tap_t hz;
+ } taps;
+
+ struct {
+ float hz;
+ } vars;
+
+ float *hz;
+
unsigned flash:1;
unsigned flash_ready:1;
} strobe_context_t;
+static void strobe_update_taps(strobe_context_t *ctxt, til_stream_t *stream, float dt)
+{
+ if (!til_stream_tap_context(stream, &ctxt->til_module_context, NULL, &ctxt->taps.hz))
+ *ctxt->hz = ctxt->setup->hz;
+ else
+ ctxt->vars.hz = *ctxt->hz;
+
+ if (ctxt->vars.hz <= 0.f)
+ ctxt->vars.hz = 0.f;
+}
+
+
static til_module_context_t * strobe_create_context(const til_module_t *module, til_stream_t *stream, unsigned seed, unsigned ticks, unsigned n_cpus, til_setup_t *setup)
{
strobe_context_t *ctxt;
@@ -46,6 +71,9 @@ static til_module_context_t * strobe_create_context(const til_module_t *module,
ctxt->setup = (strobe_setup_t *)setup;
ctxt->last_flash_ticks = ticks;
+ ctxt->taps.hz = til_tap_init_float(ctxt, &ctxt->hz, 1, &ctxt->vars.hz, "hz");
+ strobe_update_taps(ctxt, stream, 0.f);
+
return &ctxt->til_module_context;
}
@@ -56,7 +84,15 @@ static void strobe_prepare_frame(til_module_context_t *context, til_stream_t *st
*res_frame_plan = (til_frame_plan_t){ .fragmenter = til_fragmenter_slice_per_cpu_x16 };
- if (ctxt->flash_ready && (ticks - ctxt->last_flash_ticks >= (unsigned)((1.f / ctxt->setup->hz) * 1000.f))){
+ strobe_update_taps(ctxt, stream, (ticks - context->last_ticks) * .001f);
+
+ if (ctxt->vars.hz <= 0.f) {
+ ctxt->flash = 0;
+ ctxt->flash_ready = 1;
+ return;
+ }
+
+ if (ctxt->flash_ready && (ticks - ctxt->last_flash_ticks >= (unsigned)((1.f / ctxt->vars.hz) * 1000.f))){
ctxt->flash = 1;
ctxt->flash_ready = 0;
} else {
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