nx_h264_cabac_ctxinc.nx

nx_h264_cabac_ctxinc.nx -- H.264 CABAC I-slice ctxIdxInc DERIVATION (spec clause 9.3.3.1.1). This is the table-INDEPENDENT logic layer of the CABAC decoder: pure procedures that select WHICH context variable each bin uses. They need no (m,n) init values, so they are verifiable in isolation (KAT gate) and are the correct next rung stacked on the already-GREEN arithmetic engine (nx_h264_cabac). The (m,n) context-init VALUE tables (spec Tables 9-12..9-33) are a SEPARATE module and are DELIBERATELY NOT included here -- they must be transcribed from the normative spec with per-table KATs, never guessed. I-slice ctxIdxOffset map (spec Table 9-11) -- documented HERE so the value tables drop into known slots: mb_type (I, prefix) : ctxIdxOffset 3 (ctxIdx 3..10) mb_qp_delta : ctxIdxOffset 60 (ctxIdx 60..63) intra_chroma_pred_mode : ctxIdxOffset 64 (ctxIdx 64..67) prev_intra4x4_pred_mode_flag: ctxIdxOffset 68 (ctxIdx 68) rem_intra4x4_pred_mode : ctxIdxOffset 69 (ctxIdx 69) coded_block_pattern (luma) : ctxIdxOffset 73 (ctxIdx 73..76) coded_block_pattern (chroma): ctxIdxOffset 77 (ctxIdx 77..84) coded_block_flag : ctxIdxOffset 85 (+ per-ctxBlockCat sub-offsets; field/8x8 extensions >459) significant_coeff_flag : ctxIdxOffset 105 (frame) / 277 (field) last_significant_coeff_flag: ctxIdxOffset 166 (frame) / 338 (field) coeff_abs_level_minus1 : ctxIdxOffset 227 end_of_slice_flag : ctxIdxOffset 276 (decoded via cab_terminate, no init pair) transform_size_8x8_flag : ctxIdxOffset 399 (High profile) LIB (no main). license_tier: ORIGINAL genealogy_id: itu_t_h264_sec9_3_3_1_1_ctxidxinc