Testing av_buffer_alloc()
alloc: size=64 data=set
writable: 1
refcount: 1
after unref: null

Testing av_buffer_allocz()
allocz: zeroed=yes

Testing av_buffer_create()
create: size=32
opaque: null
custom_free called: yes

Testing AV_BUFFER_FLAG_READONLY
readonly writable: 0

Testing av_buffer_ref()
ref: refcount=2
shared data: yes
writable after ref: 0
refcount after unref: 1
writable after unref: 1

Testing av_buffer_make_writable()
make_writable ret: 1
data preserved: yes
now writable: 1
original still valid: yes

Testing av_buffer_realloc()
realloc: size=32
data preserved: yes
realloc from null: OK

Testing av_buffer_replace()
replace: data=0x22
refcount: 2
replace with null: OK

Testing av_buffer_pool()
pool get: size=64
pool reuse: size=64
pool uninit: OK

Testing av_buffer_pool_init2()
pool2 get: size=64
alloc2 called: yes
pool_buffer_get_opaque: null
pool_free called: yes

Testing OOM paths
alloc OOM: OK
allocz OOM: OK
pool init OOM: OK
ref OOM: OK
realloc OOM: OK