Merge remote-tracking branch 'cus/stable'

* cus/stable:
  ffplay: increase sample array buffer
  configure: add crop filter as ffplay requirement
  ffplay: ensure that pictq_prev_picture never fills the picture queue
  ffplay: simplify picture allocation
  ffplay: make initial window size calculation based on aspect ratio
  ffplay: factor display rectangle calculation to its own function

Merged-by: Michael Niedermayer <michaelni@gmx.at>