Hi,
On 05/29/2011 01:19 PM, Hans Verkuil wrote:
Hi Mauro,
Thanks for the RFC! Some initial comments below. I'll hope to do some more
testing and reviewing in the coming week.
<Snip>
c) get_not_associated_device: Returns the next device not associated with
an specific device type.
char *get_not_associated_device(void *opaque,
char *last_seek,
enum device_type desired_type,
enum device_type not_desired_type);
The parameters are:
opaque: media devices opaque descriptor
last_seek: last seek result. Use NULL to get the first result
desired_type: type of the desired device
not_desired_type: type of the seek device
This function seeks inside the media_devices struct for the next physical
device that doesn't support a non_desired type.
This method is useful for example to return the audio devices that are
provided by the motherboard.
Hmmm. What you really want IMHO is to iterate over 'media hardware', and for
each piece of hardware you can find the associated device nodes.
It's what you expect to see in an application: a list of USB/PCI/Platform
devices to choose from.
This is exactly what I was thinking, I was think along the lines of making
the device_type enum bitmasks instead, and have a list devices functions,
which lists all the "physical" media devices as "describing string",
capabilities pairs, where capabilities would include things like sound
in / sound out, etc.
And then a function to get a device string (be it a device node
or an alsa device string, whatever is appropriate) for each capability
of a device.
This does need some more thought for more complex devices though ...
Regards,
Hans
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