-
Zoe Liu authored
The frame marked as last_bipred at the encoder side is the frame right before the source frame of BWDREF_FRAME, which was not used as a reference. This CL is to add this type of frames to the reference frame buffer and use them as reference for the coding of future frames. This is a non-normative change. A tiny gain is observed (lowres BDRate -0.016% in avg psnr). The main target of this CL is to make it possible to have more flexible gf group structure. For instance, LAST_BIPRED_UPDATE can be replaced by LAST_UPDATE followed by an extra alt ref frame. Change-Id: If3dbce0959bb468e95d01a1feca1dac6bfb91d36
aff92d58