예제 #1
0
/*
 * Send traffic from a scheduler instance due by 'now'.
 * Return a pointer to the head of the queue.
 */
static struct mbuf *
serve_sched(struct mq *q, struct dn_sch_inst *si, uint64_t now)
{
	struct mq def_q;
	struct dn_schk *s = si->sched;
	struct mbuf *m = NULL;
	int delay_line_idle = (si->dline.mq.head == NULL);
	int done, bw;

	if (q == NULL) {
		q = &def_q;
		q->head = NULL;
	}

	bw = s->link.bandwidth;
	si->kflags &= ~DN_ACTIVE;

	if (bw > 0)
		si->credit += (now - si->sched_time) * bw;
	else
		si->credit = 0;
	si->sched_time = now;
	done = 0;
	while (si->credit >= 0 && (m = s->fp->dequeue(si)) != NULL) {
		uint64_t len_scaled;

		done++;
		len_scaled = (bw == 0) ? 0 : hz *
			(m->m_pkthdr.len * 8 + extra_bits(m, s));
		si->credit -= len_scaled;
		/* Move packet in the delay line */
		dn_tag_get(m)->output_time = dn_cfg.curr_time + s->link.delay ;
		mq_append(&si->dline.mq, m);
	}

	/*
	 * If credit >= 0 the instance is idle, mark time.
	 * Otherwise put back in the heap, and adjust the output
	 * time of the last inserted packet, m, which was too early.
	 */
	if (si->credit >= 0) {
		si->idle_time = now;
	} else {
		uint64_t t;
		KASSERT (bw > 0, ("bw=0 and credit<0 ?"));
		t = div64(bw - 1 - si->credit, bw);
		if (m)
			dn_tag_get(m)->output_time += t;
		si->kflags |= DN_ACTIVE;
		heap_insert(&dn_cfg.evheap, now + t, si);
	}
	if (delay_line_idle && done)
		transmit_event(q, &si->dline, now);
	return q->head;
}
예제 #2
0
파일: intrax8.c 프로젝트: coffeez/libav
        table_index = get_bits(&s->gb, 1+(w->quant<13) );
        w->j_orient_vlc = &j_orient_vlc[w->quant<13][table_index];
    }
    assert(w->j_orient_vlc);
    assert(w->j_orient_vlc->table);

    return get_vlc2(&s->gb, w->j_orient_vlc->table, OR_VLC_BITS, OR_VLC_MTD);
}

#define extra_bits(eb) (eb)
#define extra_run   (0xFF<<8)
#define extra_level (0x00<<8)
#define   run_offset(r)    ((r)<<16)
#define level_offset(l)    ((l)<<24)
static const uint32_t ac_decode_table[]={
    /*46*/ extra_bits(3) |  extra_run  | run_offset(16) | level_offset( 0),
    /*47*/ extra_bits(3) |  extra_run  | run_offset(24) | level_offset( 0),
    /*48*/ extra_bits(2) |  extra_run  | run_offset( 4) | level_offset( 1),
    /*49*/ extra_bits(3) |  extra_run  | run_offset( 8) | level_offset( 1),

    /*50*/ extra_bits(5) |  extra_run  | run_offset(32) | level_offset( 0),
    /*51*/ extra_bits(4) |  extra_run  | run_offset(16) | level_offset( 1),

    /*52*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset( 4),
    /*53*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset( 8),
    /*54*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset(12),
    /*55*/ extra_bits(3) | extra_level | run_offset( 0) | level_offset(16),
    /*56*/ extra_bits(3) | extra_level | run_offset( 0) | level_offset(24),

    /*57*/ extra_bits(2) | extra_level | run_offset( 1) | level_offset( 3),
    /*58*/ extra_bits(3) | extra_level | run_offset( 1) | level_offset( 7),