This reverts commit f9eec62983.
This does not effectively cover all cases. The values for some frames need
to be inferred by the decoder.
Signed-off-by: James Almer <jamrial@gmail.com>
The spec in section 6.8.20 states the parameters should be loaded from a
reference frame indexed by film_grain_params_ref_idx.
Signed-off-by: James Almer <jamrial@gmail.com>