Parse an allocation query, writing the requested caps in caps and whether a pool is needed in need_pool, if the respective parameters are non-NULL.
The GstCaps. out[transfer none][allow-none]
Whether a GstBufferPool is needed. out[allow-none]
See Implementation
Parse an allocation query, writing the requested caps in caps and whether a pool is needed in need_pool, if the respective parameters are non-NULL.