libmix: increase DPB_SIZE to handle H264 stream with 16 reference frames.

BZ: 10408

Current DPB_SIZE for H264 is set to 16, if reference frame number reaches maximum 16
and the frame to be decoded is a referencs as well, no left buffer node for current frame
and one reference frame will be replaced, which leads to decoding error due to missing reference.

Change-Id: If88bb5cc17384f1c5dcec21fdf5b517625b48c17
Reviewed-on: http://android.intel.com:8080/19993
Reviewed-by: Tang, Guifang <guifang.tang@intel.com>
Reviewed-by: Qiu, Junhai <junhai.qiu@intel.com>
Reviewed-by: Chen, Weian <weian.chen@intel.com>
Tested-by: Ding, Haitao <haitao.ding@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
2 files changed