Testing av_dynamic_hdr_vivid_alloc()
alloc: OK, size>0=yes
defaults: system_start_code=0, num_windows=0
write: system_start_code=1, num_windows=1
params[0]: min=100/1 avg=500/1 var=200/1 max=1000/1
alloc (no size): OK

Testing av_dynamic_hdr_vivid_create_side_data()
side_data: OK
side_data write: system_start_code=2

Testing OOM paths
alloc OOM: OK
side_data OOM: OK
