47 lines
1.3 KiB
Cython
47 lines
1.3 KiB
Cython
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cimport libav as lib
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from libc.stdint cimport uint8_t, uintptr_t
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from libc.string cimport memcpy
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cdef void key_free(void *opaque, uint8_t *data) noexcept nogil:
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cdef char *name = <char *>data
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with gil:
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opaque_container.pop(name)
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cdef class OpaqueContainer:
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def __cinit__(self):
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self._objects = {}
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cdef lib.AVBufferRef *add(self, object v):
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# Use object's memory address as key
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cdef uintptr_t key = <uintptr_t><long long>id(v)
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self._objects[key] = v
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cdef uint8_t *data = <uint8_t *>lib.av_malloc(sizeof(uintptr_t))
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if data == NULL:
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raise MemoryError("Failed to allocate memory for key")
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memcpy(data, &key, sizeof(uintptr_t))
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# Create the buffer with our free callback
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cdef lib.AVBufferRef *buffer_ref = lib.av_buffer_create(
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data, sizeof(uintptr_t), key_free, NULL, 0
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)
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if buffer_ref == NULL:
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raise MemoryError("Failed to create AVBufferRef")
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return buffer_ref
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cdef object get(self, char *name):
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cdef uintptr_t key = (<uintptr_t *>name)[0]
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return self._objects.get(key)
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cdef object pop(self, char *name):
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cdef uintptr_t key = (<uintptr_t *>name)[0]
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return self._objects.pop(key, None)
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cdef OpaqueContainer opaque_container = OpaqueContainer()
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