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|
(define-module (starlet base)
#:use-module (oop goops)
#:use-module (ice-9 threads)
#:use-module (ice-9 atomic)
#:use-module (web client)
#:use-module (web http)
#:use-module (web uri)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9)
#:export (<fixture>
<fixture-attribute>
<starlet-state>
start-ola-output
patch-fixture!
scanout-freq
make-empty-state
register-state!
percent->dmxval
hirestime
state-for-each
get-attributes
set-attr!
get-attr-name
value->number
merge-states-htp
get-state-hash-table
set-state-hash-table!
add-state-to-state!
scanout-fixture
attr-continuous
attr-boolean
attr-list
current-state
lighting-state
apply-state
at
blackout
clear-state!
home-val
intensity?
state-find
get-attr-type
fixture?
fixture-attribute?
programmer-state
selection-state
current-value))
(define-class <fixture-attribute> (<object>)
(name
#:init-value 'unnamed-attribute
#:init-keyword #:name
#:getter get-attr-name)
(range
#:init-value '()
#:init-keyword #:range
#:getter get-attr-range)
(type
#:init-value 'continuous
#:init-keyword #:type
#:getter get-attr-type)
(home-value
#:init-value 0
#:init-keyword #:home-value
#:getter get-attr-home-value
#:setter set-attr-home-value!))
(define-class <fixture> (<object>)
(universe
#:init-value #f
#:init-keyword #:uni
#:getter get-fixture-universe
#:setter set-fixture-universe!)
(start-addr
#:init-value #f
#:init-keyword #:sa
#:getter get-fixture-addr
#:setter set-fixture-addr!)
(friendly-name
#:init-value "Fixture"
#:init-keyword #:friendly-name
#:getter get-fixture-friendly-name
#:setter set-fixture-friendly-name!)
(scanout-func
#:init-value (lambda (universe start-addr value set-dmx) #f)
#:init-keyword #:scanout-func
#:getter get-scanout-func))
(define (get-attributes f)
(slot-ref f 'attributes))
(define (fixture? f)
(is-a? f <fixture>))
(define (fixture-attribute? f)
(is-a? f <fixture-attribute>))
;; A "state" is just a thin wrapper around a hash table
;; of (fixture . attribute) --> value
(define-class <starlet-state> (<object>)
(hash-table
#:init-form (make-hash-table)
#:getter get-state-hash-table
#:setter set-state-hash-table!))
(define-method (set-in-state! (state <starlet-state>)
(fix <fixture>)
(attr <fixture-attribute>)
value)
(hash-set! (get-state-hash-table state)
(cons fix attr)
value))
;; List of fixtures
(define patched-fixture-list (make-atomic-box '()))
;; Basic state which holds everything at "home" unless
;; commanded otherwise
(define home-state (make <starlet-state>))
;; The state used to build a new scene for recording
(define programmer-state (make <starlet-state>))
;; The state which holds the fixtures being altered right now
(define selection-state (make <starlet-state>))
(define (blackout state)
(state-for-each
(lambda (fix attr val)
(when (intensity? attr)
(set-in-state! state fix attr 0.0)))
state))
(define (make-empty-state)
(make <starlet-state>))
;; List of states being scanned out
(define state-list (make-atomic-box (list home-state)))
;; Set a single attribute to home position
(define (home-attr! state fix attr)
(set-in-state! state
fix
attr
(get-attr-home-value attr)))
;; Set all attributes of a fixture to home position
(define (home-all! state fix)
(for-each (lambda (attr)
(home-attr! state fix attr))
(slot-ref fix 'attributes)))
(define (home-val fix attr)
(state-find fix
attr
home-state))
(define (intensity? a)
(eq? 'intensity (get-attr-name a)))
(define (find-attr fix attr-name)
(find (lambda (a)
(eq? (get-attr-name a)
attr-name))
(slot-ref fix 'attributes)))
(define (register-state! new-state)
(atomic-box-set! state-list
(cons new-state
(atomic-box-ref state-list))))
;; Set an attribute by name
(define (set-attr! state fix attr-name value)
(cond
((symbol? attr-name)
(let ((attr (find-attr fix attr-name)))
(when attr (set-in-state! state fix attr value))))
((fixture-attribute? attr-name)
(set-in-state! state fix attr-name value))))
;; Patch a new fixture
(define* (patch-fixture! class
start-addr
#:key (universe 0) (friendly-name "Fixture"))
(let ((new-fixture (make class
#:sa start-addr
#:uni universe
#:friendly-name friendly-name)))
(home-all! home-state new-fixture)
(atomic-box-set! patched-fixture-list
(cons new-fixture
(atomic-box-ref patched-fixture-list)))
new-fixture))
;; Helper functions for scanout functions
(define (round-dmx a)
(inexact->exact
(min 255 (max 0 (round a)))))
(define (percent->dmxval val)
(round-dmx (/ (* 256 val) 100)))
(define (msb val)
(round-dmx (euclidean-quotient val 256)))
(define (lsb val)
(round-dmx (euclidean-remainder val 256)))
(define (state-for-each func state)
(hash-for-each (lambda (key value)
(func (car key)
(cdr key)
value))
(get-state-hash-table state)))
(define (state-find fix attr state)
(hash-ref (get-state-hash-table state)
(cons fix attr)))
;; Add the contents of state "new" to "combined-state"
(define (add-state-to-state! merge-rule new combined-state)
(state-for-each (lambda (fix attr value)
(let ((current-value (state-find fix
attr
combined-state)))
(if current-value
(set-in-state! combined-state
fix
attr
(merge-rule attr current-value value))
(set-in-state! combined-state
fix
attr
value))))
new))
(define (apply-state state)
(add-state-to-state! merge-rule-ltp state (current-state)))
(define (value->number val time)
(if (procedure? val)
(val time)
val))
(define (clear-state! state)
(set-state-hash-table! state (make-hash-table)))
(define (merge-rule-ltp attr a b)
(lambda (time)
(value->number b time)))
(define (merge-rule-htp attr a b)
(if (intensity? attr)
;; HTP only for intensity attributes
(lambda (time)
(max (value->number a time)
(value->number b time)))
;; LTP for all non-intensity attributes
(lambda (time)
(value->number b time))))
(define (merge-states-htp list-of-states)
(merge-states merge-rule-htp
list-of-states))
(define (merge-states-ltp list-of-states)
(merge-states merge-rule-ltp
list-of-states))
;; Combine states
(define (merge-states merge-rule list-of-states)
(let ((combined-state (make <starlet-state>)))
(for-each (lambda (state)
(add-state-to-state! merge-rule
state
combined-state))
list-of-states)
combined-state))
;; Scanout
(define (bytevec->string bv)
(string-join
(map
number->string
(u8vector->list bv))
","))
(define (send-to-ola ola-uri ola-socket universe)
(http-post
ola-uri
#:port ola-socket
#:keep-alive? #t
#:headers (acons 'content-type
(parse-header 'content-type
"application/x-www-form-urlencoded")
'())
#:body (string-append "u="
(number->string (car universe))
"&d="
(bytevec->string (cdr universe)))))
(define (hirestime)
(let ((a (gettimeofday)))
(+ (car a)
(/ (cdr a)
1000000))))
(define scanout-freq 0)
(define-generic scanout-fixture)
(define (scanout-loop ola-uri ola-socket start-time count)
(let ((universes '()))
;; Helper function for scanout functions to set individual DMX values
(define (set-dmx universe addr value)
;; Create DMX array for universe if it doesn't exist already
(unless (assq universe universes)
(set! universes (acons universe
(make-u8vector 512 0)
universes)))
;; Set the value in the DMX array
(u8vector-set! (assq-ref universes universe)
(- addr 1) ; u8vector-set indexing starts from zero
(round-dmx value)))
;; Make a combined state
(let* ((combined-state (merge-states-ltp
(list
(merge-states-htp
(reverse ;; Put "home" state last
(atomic-box-ref state-list)))
programmer-state
selection-state))))
;; Request all fixtures to output their DMX values
(for-each (lambda (fix)
;; Helper function to get a value for this
;; fixture in the current state
(define (get-attr attr-name)
(value->number (state-find fix
(find-attr fix attr-name)
combined-state)
(hirestime)))
;; Helper function to set 8-bit DMX value
(define (set-chan relative-channel-number value)
(set-dmx (get-fixture-universe fix)
(+ (get-fixture-addr fix)
(- relative-channel-number 1))
value))
;; Helper function to set 16-bit DMX value
(define (set-chan-16bit relative-channel-number value max-value)
(let ((val16 (* (min value max-value) (/ 65535 max-value))))
(set-chan relative-channel-number (msb val16))
(set-chan (+ relative-channel-number 1) (lsb val16))))
(scanout-fixture fix get-attr set-chan set-chan-16bit))
(atomic-box-ref patched-fixture-list))
;; Send everything to OLA
(for-each (lambda (a)
(send-to-ola ola-uri ola-socket a))
universes))
(usleep 10000)
;; Update scanout rate every 1000 cycles
(if (eq? count 100)
(begin
(set! scanout-freq
(exact->inexact (/ 100
(- (hirestime) start-time))))
(scanout-loop ola-uri ola-socket (hirestime) 0))
(scanout-loop ola-uri ola-socket start-time (+ count 1)))))
(define (start-ola-output)
(let* ((ola-uri (build-uri 'http
#:host "127.0.0.1"
#:port 9090
#:path "/set_dmx"))
(ola-socket (open-socket-for-uri ola-uri))
(start-time (hirestime)))
(begin-thread
(with-exception-handler
(lambda (exn)
(backtrace)
(raise-exception exn))
(lambda ()
(scanout-loop ola-uri ola-socket start-time 0))
#:unwind? #f))))
(define (current-value fix attr-name)
;; FIXME: Only need to track one fixture through the state stack
(let ((combined-state (merge-states-ltp
(list
(merge-states-htp
(reverse ;; Put "home" state last
(atomic-box-ref state-list)))
programmer-state
selection-state)))
(attr (find-attr fix attr-name)))
(value->number (state-find fix attr combined-state) 0)))
(define-syntax attr-continuous
(syntax-rules ()
((_ attr-name attr-range attr-home-value)
(make <fixture-attribute>
#:name attr-name
#:range attr-range
#:type 'continuous
#:home-value attr-home-value))))
(define-syntax attr-boolean
(syntax-rules ()
((_ attr-name attr-home-value)
(make <fixture-attribute>
#:name attr-name
#:type 'boolean
#:home-value attr-home-value))))
(define-syntax attr-list
(syntax-rules ()
((_ attr-name attr-allowed-values attr-home-value)
(make <fixture-attribute>
#:name attr-name
#:range attr-allowed-values
#:type 'list
#:home-value attr-home-value))))
(define current-state (make-parameter (make-empty-state)))
(register-state! (current-state))
(define-syntax lighting-state
(syntax-rules ()
((_ body ...)
(parameterize ((current-state (make-empty-state)))
body ...
(current-state)))))
(define-syntax at
(syntax-rules ()
;; No attribute named -> set intensity
((_ fixture value)
(set-attr! (current-state) fixture 'intensity value))
;; Set specified attribute
((_ fixture attr-name value)
(set-attr! (current-state) fixture attr-name value))))
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