public async Task InitialiseAsync(
Func <IEnumerable <MediaFrameSourceInfo>, MediaFrameSourceInfo> sourceInfoSelector,
FilterSet filterChain = null)
{
// Get all the media frame source groups.
var mediaFrameSourceGroups = await MediaFrameSourceGroup.FindAllAsync();
// Flatten all this data out so that we have access to the groups, the source infos and the
// video profiles.
var mediaSourceInfos = mediaFrameSourceGroups
.SelectMany(
group => group.SourceInfos
)
.SelectMany(
sourceInfo => sourceInfo.VideoProfileMediaDescription,
(sourceInfo, videoProfileDescriptions) =>
new
{
MediaFrameSourceInfo = sourceInfo,
VideoProfileDescription = videoProfileDescriptions
}
);
// Find the ones which match our device & which satisfy all of the media frame source info
// filters && all of the video device profile filters.
var filteredSourceInfos = mediaSourceInfos
.Where(
entry => (
(entry.MediaFrameSourceInfo.DeviceInformation.Id == this.deviceFinder.Device.Id) &&
(filterChain == null || filterChain.All(entry.MediaFrameSourceInfo)) &&
(filterChain == null || filterChain.All(entry.VideoProfileDescription))));
this.mediaFrameSourceInfo =
sourceInfoSelector(filteredSourceInfos.Select(si => si.MediaFrameSourceInfo));
}
