BUFFER in gstreamer 1.0

[BogdanS]

Hi.
I am trying to run this example
http://stackoverflow.com/questions/8746719/gstreamer-appsrc-test-application
(last one)
And GST_BUFFER_SIZE GST_BUFFER_MALLOC() .etc not defined in gstreamer-1.0 gstbuffer.h

I think it was example for 0.1

What I can use in 1.0? Thank you