Element parent class
If set to %TRUE, passthrough mode will be automatically enabled if the caps are the same. Set to %FALSE by default.
If set to %TRUE, transform_ip will be called in
passthrough mode. The passed buffer might not be
writable. When %FALSE, neither transform nor
transform_ip will be called in passthrough mode.
Set to %TRUE by default.
Subclasses can override any of the available virtual methods or not, as needed. At minimum either
transformortransform_ipneed to be overridden. If the element can overwrite the input data with the results (data is of the same type and quantity) it should providetransform_ip.