Some cameras support a range of resolutions with step wise. The fix is
to not only capture the highest resolutions but uses the step wise to
determine if we can support the hardcoded standard resolutions,
https://commons.wikimedia.org/wiki/File:Vector_Video_Standards2.svg.
In the future, we should use a custom data structure to capture more
resolutions that are outside of the listed standard resolutions.
/dev/v4l/by-path doesn't return all available devices. So, to make sure
that we include all available devices, the list of devices will also
complement with /dev/video*.
- Treat camera read timeout as error and return detailed errors.
- Return io.EOF on Read after Close.
- Wait finishing video read loop to avoid memory violation
as the video frames might be alloced by C or on shared memory.
Resolves https://github.com/pion/mediadevices/issues/22
Created 2 new directories under driver, camera and microphone. Moved
camera_linux.go and microphone_linux.go appropriately. Imported
driver/camera and driver/microphone by default.
