schemelib/bindings/gstreamer1.scm

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2020-07-02 15:27:52 +00:00
(load-shared-object "libgstreamer-1.0.so.0"))
; Data structures
(define (gst-message->symbol int)
(case int
((1) 'eos)
((2) 'error)))
(define (gst-state->int symbol)
(case symbol
((void-pending) 0)
((null) 1)
((ready) 2)
((paused) 3)
((playing) 4)))
(define-ftype gst-mini-object
(struct
[type unsigned-long]
[refcount int]
[lockstate int]
[flags unsigned-int]
[copy void*]
[dispose void*]
[free void*]
[n-qdata unsigned-int]
[qdata void*]))
(define-ftype gst-message
(struct
[mini-object gst-mini-object]
[type int]
[timestamp unsigned-64]
[src void*]
[seqnum unsigned-32]
[lock void*]
[cond void*]))
(define (gst-init argc argv)
((foreign-procedure "gst_init" (ptr void*) void) argc argv))
(define (gst-element-factory-make factory-name name)
((foreign-procedure "gst_element_factory_make" (string string) void*) factory-name name))
(define (gst-pipeline-get-bus pipeline)
((foreign-procedure "gst_pipeline_get_bus" (void*) void*) pipeline))
(define (gst-bus-add-watch bus func user-data)
((foreign-procedure "gst_bus_add_watch" (void* void* void*) int) bus func user-data))
(define (gst-bus-add-signal-watch bus)
((foreign-procedure "gst_bus_add_signal_watch" (void*) void) bus))
(define (gst-object-unref object)
((foreign-procedure "gst_object_unref" (void*) void) object))
(define (gst-element-set-state element state)
((foreign-procedure "gst_element_set_state" (void* int) int) element state))
(define (gst-filename-to-uri filename err)
((foreign-procedure "gst_filename_to_uri" (string void*) string) filename err))