Function ls_get_code_regular

libavcodec/jpeglsdec.c:153–179

* Get context-dependent Golomb code, decode it and update context */

 * Get context-dependent Golomb code, decode it and update context
 */
static inline int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q)
{
    int k, ret;

    for (k = 0; ((unsigned)state->N[Q] << k) < state->A[Q]; k++)
        ;

#ifdef JLS_BROKEN
    if (!show_bits_long(gb, 32))
        return -1;
#endif
    ret = get_ur_golomb_jpegls(gb, k, state->limit, state->qbpp);

    /* decode mapped error */
    if (ret & 1)
        ret = -(ret + 1 >> 1);
    else
        ret >>= 1;

    /* for NEAR=0, k=0 and 2*B[Q] <= - N[Q] mapping is reversed */
    if (!state->near && !k && (2 * state->B[Q] <= -state->N[Q]))
        ret = -(ret + 1);

    ret = ff_jpegls_update_state_regular(state, Q, ret);

    return ret;
}

/**
 * Get Golomb code, decode it and update state for run termination