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