sync = DVB_RINGBUFFER_PEEK(buf, 0) << 24;
sync |= DVB_RINGBUFFER_PEEK(buf, 1) << 16;
sync |= DVB_RINGBUFFER_PEEK(buf, 2) << 8;
sync = DVB_RINGBUFFER_PEEK(buf, 0) << 24;
sync |= DVB_RINGBUFFER_PEEK(buf, 1) << 16;
sync |= DVB_RINGBUFFER_PEEK(buf, 2) << 8;