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from av.filter.link cimport wrap_filter_link
cdef object _cinit_sentinel = object()
cdef class FilterPad:
def __cinit__(self, sentinel):
if sentinel is not _cinit_sentinel:
raise RuntimeError("cannot construct FilterPad")
def __repr__(self):
_filter = self.filter.name
_io = "inputs" if self.is_input else "outputs"
return f"<av.FilterPad {_filter}.{_io}[{self.index}]: {self.name} ({self.type})>"
@property
def is_output(self):
return not self.is_input
@property
def name(self):
return lib.avfilter_pad_get_name(self.base_ptr, self.index)
@property
def type(self):
"""
The media type of this filter pad.
Examples: `'audio'`, `'video'`, `'subtitle'`.
:type: str
"""
return lib.av_get_media_type_string(lib.avfilter_pad_get_type(self.base_ptr, self.index))
cdef class FilterContextPad(FilterPad):
def __repr__(self):
_filter = self.filter.name
_io = "inputs" if self.is_input else "outputs"
context = self.context.name
return f"<av.FilterContextPad {_filter}.{_io}[{self.index}] of {context}: {self.name} ({self.type})>"
@property
def link(self):
if self._link:
return self._link
cdef lib.AVFilterLink **links = self.context.ptr.inputs if self.is_input else self.context.ptr.outputs
cdef lib.AVFilterLink *link = links[self.index]
if not link:
return
self._link = wrap_filter_link(self.context.graph, link)
return self._link
@property
def linked(self):
cdef FilterLink link = self.link
if link:
return link.input if self.is_input else link.output
cdef tuple alloc_filter_pads(Filter filter, const lib.AVFilterPad *ptr, bint is_input, FilterContext context=None):
if not ptr:
return ()
pads = []
# We need to be careful and check our bounds if we know what they are,
# since the arrays on a AVFilterContext are not NULL terminated.
cdef int i = 0
cdef int count
if context is None:
# This is a custom function defined using a macro in avfilter.pxd. Its usage
# can be changed after we stop supporting FFmpeg < 5.0.
count = lib.pyav_get_num_pads(filter.ptr, not is_input, ptr)
else:
count = (context.ptr.nb_inputs if is_input else context.ptr.nb_outputs)
cdef FilterPad pad
while (i < count):
pad = FilterPad(_cinit_sentinel) if context is None else FilterContextPad(_cinit_sentinel)
pads.append(pad)
pad.filter = filter
pad.context = context
pad.is_input = is_input
pad.base_ptr = ptr
pad.index = i
i += 1
return tuple(pads)
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