nx_rle.nx

nx_rle.nx -- run-length encoding for sparse coefficient streams. Encoding format for one 8x8 block (64 entries): Stream is a sequence of (run, level) pairs. Each pair is: [run_byte] number of preceding zeros (0..63 inclusive) [level_int16] the non-zero coefficient that follows the run The stream is terminated by an End-Of-Block marker = (0, 0). A run of >63 zeros wraps via a special "zero-run-only" pair (run=63, level=0) that consumes 63 zeros and contributes none; caller continues from there. Since one block has 64 coefficients, 64 zeros total means we emit (0, 0) immediately (EOB). genealogy_id: jpeg_iso_10918 + mpeg_iso_11172 + h264_cavlc + nx_zigzag_q10 lineage_id: nishi_rle_block_q10