Re: [Libmtp-discuss] Finding a specific device

[Linus W. <lin...@gm...>]

2008/2/17, Ali Shah <ca...@gm...>:

> Opening from the raw device structs can be accomplished by doing a
> prime_device_memory, assign_known_device_flags, configure_usb_device etc on
> the singular device only.

Yep.

> 1) The client application will need to be notified via HAL/DBUS when a
> device has been disconnected/connected
> 2) Its not completely clear how we HAL detections to the libusb raw devices.

Yep. We cannot move that into libmtp, because the Mac and "other"
OS:es doesn't have HAL+D-Bus, and even if they did, it'd be a bit
thick to require that.

I do not know if libusb supplies some marker that can be used to match
the HAL info, sadly.

However, I don't think it matters so much, we rescan
the list when we get a HAL callback, then we notice a new device was
connected. We do likewise when we get a HAL disconnect callback,
and close (Release) devices accordingly.

>  3) unfortunately this method does not give alot of information to the
> client application, besides, here is a list of raw devices, please pick from
> one..

HAL actually give the manufacturer+device ID as strings. If we can match
these informations, we'd be home.

Otherwise, we can get the USB-level device name if there is one.
Else a dialog of the type "a new media device was connected, open
an MTP session to it?" is acceptable I believe.

Linus