Class: Freenect::Context

Inherits:
Object
  • Object
show all
Defined in:
lib/freenect/context.rb

Instance Method Summary collapse

Constructor Details

#initialize(usb_ctx = nil) ⇒ Context 



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# File 'lib/freenect/context.rb', line 9

def initialize(usb_ctx=nil)
  ctx_p = FFI::MemoryPointer.new(:pointer)
  if ::FFI::Freenect.freenect_init(ctx_p, usb_ctx) != 0
    raise ContextError, "freenect_init() returned nonzero"
  elsif ctx_p.null?
    raise ContextError, "freenect_init() produced a NULL context"
  end
  @ctx = ctx_p.read_pointer
end

Instance Method Details

#close ⇒ Object Also known as: shutdown 



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# File 'lib/freenect/context.rb', line 51

def close
  unless closed?
    if ::FFI::Freenect.freenect_shutdown(@ctx) != 0
      raise ContextError, "freenect_shutdown() returned nonzero"
    end
    @ctx_closed = true
  end
end

#closed? ⇒ Boolean 



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# File 'lib/freenect/context.rb', line 62

def closed?
  @ctx_closed == true
end

#context ⇒ Object 



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# File 'lib/freenect/context.rb', line 19

def context
  if @ctx_closed
    raise ContextError, "This context has been shut down and can no longer be used"
  else
    return @ctx
  end
end

#num_devices ⇒ Object 



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# File 'lib/freenect/context.rb', line 27

def num_devices
  ::FFI::Freenect.freenect_num_devices(self.context)
end

#open_device(idx) ⇒ Object Also known as: [] 



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# File 'lib/freenect/context.rb', line 31

def open_device(idx)
  return Device.new(self, idx)
end

#process_events ⇒ Object 



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# File 'lib/freenect/context.rb', line 47

def process_events
  ::FFI::Freenect.freenect_process_events(self.context)
end

#set_log_callback(&block) ⇒ Object 



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# File 'lib/freenect/context.rb', line 43

def set_log_callback(&block)
  ::FFI::Freenect.freenect_set_log_callback(self.context, block)
end

#set_log_level(loglevel) ⇒ Object Also known as: log_level= 



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# File 'lib/freenect/context.rb', line 37

def set_log_level(loglevel)
  ::FFI::Freenect.freenect_set_log_level(self.context, loglevel)
end