basetransform: set_passthrough() not doing what the doc says
Submitted by Nicolas Dufresne @ndufresne
Link to original bug (#792645)
Description
The doc says:
- Always %TRUE for filters which don't implement either a transform
- or transform_ip method.
While the implementation is no-op in the case we pass FALSE and that conditions is met:
if (!passthrough) {
if (bclass->transform_ip || bclass->transform)
trans->priv->passthrough = FALSE;
} else {
trans->priv->passthrough = TRUE;
}
It's also a weird condition to check for filters that only wants to implement submit_input_buffer() and generate_output(), as they need to place a useless stub for one of the transform function in order to make it behave properly.