static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block, uint8_t *last_nnz, int ac_index, int16_t *quant_matrix, int ss, int se, int Al, int *EOBRUN) { int code, i = ss, j, sign, val, run; int last = FFMIN(se, *last_nnz); OPEN_READER(re, &s->gb); if (*EOBRUN) { (*EOBRUN)--; } else { for (; ; i++) { UPDATE_CACHE(re, &s->gb); GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2); if (code & 0xF) { run = ((unsigned) code) >> 4; UPDATE_CACHE(re, &s->gb); val = SHOW_UBITS(re, &s->gb, 1); LAST_SKIP_BITS(re, &s->gb, 1); ZERO_RUN; j = s->scantable.permutated[i]; val--; block[j] = ((quant_matrix[j]^val) - val) << Al; if (i == se) { if (i > *last_nnz) *last_nnz = i; CLOSE_READER(re, &s->gb); return 0; } } else { run = ((unsigned) code) >> 4; if (run == 0xF) { ZERO_RUN; } else { val = run; run = (1 << run); if (val) { UPDATE_CACHE(re, &s->gb); run += SHOW_UBITS(re, &s->gb, val); LAST_SKIP_BITS(re, &s->gb, val); } *EOBRUN = run - 1; break; } } } if (i > *last_nnz) *last_nnz = i; } for (; i <= last; i++) { j = s->scantable.permutated[i]; if (block[j]) REFINE_BIT(j) } CLOSE_READER(re, &s->gb); return 0; }