CONTEXT_MODEL_SAO_MERGE_FLAG  988 libde265/slice.cc                              &tctx->ctx_model[CONTEXT_MODEL_SAO_MERGE_FLAG]);
CONTEXT_MODEL_SAO_MERGE_FLAG 2052 libde265/slice.cc   init_context(tctx, CONTEXT_MODEL_SAO_MERGE_FLAG,                      &initValue_sao_merge_leftUp_flag[initType],    1);