nx_jpeg_mcu_test.nx

nx_jpeg_mcu_test.nx -- KAT for the MCU walker. Strategy: minimal grayscale 8x8 image (1 MCU, 1 block, 1 component). Bitstream design: DC category 0 -> "0" + no magnitude bits. Then AC EOB -> "0". Total 2 bits: 0b00000000 = 0x00. Expected output: all 64 IDCT samples are 0 (since all coefficients are 0), then level-shift +128 -> all samples = 128. Plane should have all 128s in the 8x8 region. Huffman tables: DC: BITS={1,0,...}, HUFFVAL={0}. symbol 0 = code "0" (1 bit) AC: BITS={1,0,...}, HUFFVAL={0x00}. symbol 0x00 = code "0" (1 bit) EOB expect_exit: 0 license_tier: ORIGINAL