diff options
| author | Thomas White <taw@physics.org> | 2021-05-02 18:38:58 +0200 |
|---|---|---|
| committer | Thomas White <taw@physics.org> | 2021-05-03 09:37:51 +0200 |
| commit | 40d564b7427f4e58b53962aeb1fea8d431bcca6f (patch) | |
| tree | 58190175a48ecbe007fabb0942df1bb04eb2d935 /guile | |
| parent | f040a936d8f39148e81b9cd7716b1b0c466b65dd (diff) | |
Don't hammer OLA with unnecessary updates
As well as reducing CPU load, this vastly reduces the number of problems
caused by data frames being accidentally interleaved with RDM.
Diffstat (limited to 'guile')
| -rw-r--r-- | guile/starlet/base.scm | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/guile/starlet/base.scm b/guile/starlet/base.scm index 57d7664..70ec741 100644 --- a/guile/starlet/base.scm +++ b/guile/starlet/base.scm @@ -459,7 +459,7 @@ pre-existing contents." (define-generic scanout-fixture) -(define (scanout-loop ola-client start-time count) +(define (scanout-loop ola-client start-time count previous-universes) (let ((universes '())) @@ -504,8 +504,18 @@ pre-existing contents." (atomic-box-ref fixtures)) ;; Send everything to OLA - (for-each (lambda (a) - (send-to-ola ola-client a)) + (for-each (lambda (uni-buf-pair) + (let ((uni (car uni-buf-pair)) + (buf (cdr uni-buf-pair))) + (let ((prev-buf (assv-ref previous-universes uni))) + + ;; Do not send exactly the same data every time, + ;; but do send an update once every 100 loops, just to + ;; make sure OLA does not forget about us. + (unless (and prev-buf + (ola-dmx-buffers-equal? buf prev-buf) + (not (= count 0))) + (send-streaming-dmx-data! ola-client uni buf))))) universes) (usleep 10000) @@ -516,8 +526,8 @@ pre-existing contents." (set! scanout-freq (exact->inexact (/ 100 (- (hirestime) start-time)))) - (scanout-loop ola-client (hirestime) 0)) - (scanout-loop ola-client start-time (+ count 1))))) + (scanout-loop ola-client (hirestime) 0 universes)) + (scanout-loop ola-client start-time (+ count 1) universes)))) (define ola-thread #f) @@ -535,7 +545,7 @@ pre-existing contents." (backtrace) (raise-exception exn)) (lambda () - (scanout-loop ola-client start-time 0)) + (scanout-loop ola-client start-time 0 '())) #:unwind? #f)))))) |