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cimport libav as lib
from av.filter.graph cimport Graph
cdef _cinit_sentinel = object()
cdef class FilterLink:
def __cinit__(self, sentinel):
if sentinel is not _cinit_sentinel:
raise RuntimeError("cannot instantiate FilterLink")
@property
def input(self):
if self._input:
return self._input
cdef lib.AVFilterContext *cctx = self.ptr.src
cdef unsigned int i
for i in range(cctx.nb_outputs):
if self.ptr == cctx.outputs[i]:
break
else:
raise RuntimeError("could not find link in context")
ctx = self.graph._context_by_ptr[<long>cctx]
self._input = ctx.outputs[i]
return self._input
@property
def output(self):
if self._output:
return self._output
cdef lib.AVFilterContext *cctx = self.ptr.dst
cdef unsigned int i
for i in range(cctx.nb_inputs):
if self.ptr == cctx.inputs[i]:
break
else:
raise RuntimeError("could not find link in context")
try:
ctx = self.graph._context_by_ptr[<long>cctx]
except KeyError:
raise RuntimeError("could not find context in graph", (cctx.name, cctx.filter.name))
self._output = ctx.inputs[i]
return self._output
cdef FilterLink wrap_filter_link(Graph graph, lib.AVFilterLink *ptr):
cdef FilterLink link = FilterLink(_cinit_sentinel)
link.graph = graph
link.ptr = ptr
return link
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