public async Task RefreshVideoCaptureFormatsAsync(VideoCaptureDeviceInfo item)
{
var formats = new CollectionViewModel <VideoCaptureFormatViewModel>();
if (item != null)
{
IReadOnlyList <VideoCaptureFormat> formatsList;
string profileId = VideoProfiles.SelectedItem?.uniqueId;
if (string.IsNullOrEmpty(profileId))
{
// Device doesn't support video profiles; fall back on flat list of capture formats.
formatsList = await DeviceVideoTrackSource.GetCaptureFormatsAsync(item.Id);
}
else
{
// Enumerate formats for the specified profile only
formatsList = await DeviceVideoTrackSource.GetCaptureFormatsAsync(item.Id, profileId);
}
foreach (var format in formatsList)
{
formats.Add(new VideoCaptureFormatViewModel
{
Format = format,
FormatEncodingDisplayName = FourCCToString(format.fourcc)
});
}
}
VideoCaptureFormats = formats;
// Select first item for convenience
VideoCaptureFormats.SelectFirstItemIfAny();
}
public void RefreshVideoProfiles(VideoCaptureDeviceInfo item, VideoProfileKind kind)
{
var videoProfiles = new CollectionViewModel <MediaCaptureVideoProfile>();
if (item != null)
{
IReadOnlyList <MediaCaptureVideoProfile> profiles;
if (kind == VideoProfileKind.Unspecified)
{
profiles = MediaCapture.FindAllVideoProfiles(item.Id);
}
else
{
int index = (int)kind;
profiles = MediaCapture.FindKnownVideoProfiles(item.Id, (KnownVideoProfile)index);
}
foreach (var profile in profiles)
{
videoProfiles.Add(profile);
}
}
VideoProfiles = videoProfiles;
// Select first item for convenience
VideoProfiles.SelectFirstItemIfAny();
}
public void RefreshVideoProfiles(VideoCaptureDeviceInfo item, VideoProfileKind kind)
{
var videoProfiles = new CollectionViewModel <MediaCaptureVideoProfile>();
if (item != null)
{
IReadOnlyList <MediaCaptureVideoProfile> profiles;
if (kind == VideoProfileKind.Unspecified)
{
profiles = MediaCapture.FindAllVideoProfiles(item.Id);
}
else
{
// VideoProfileKind and KnownVideoProfile are the same with the exception of
// `Unspecified` that takes value 0.
var profile = (KnownVideoProfile)((int)kind - 1);
profiles = MediaCapture.FindKnownVideoProfiles(item.Id, profile);
}
foreach (var profile in profiles)
{
videoProfiles.Add(profile);
}
}
VideoProfiles = videoProfiles;
// Select first item for convenience
VideoProfiles.SelectFirstItemIfAny();
}
public async Task RefreshVideoCaptureDevicesAsync()
{
Logger.Log($"Refreshing list of video capture devices");
ErrorMessage = null;
try
{
await Utils.RequestMediaAccessAsync(StreamingCaptureMode.Video);
}
catch (UnauthorizedAccessException uae)
{
ErrorMessage = "This application is not authorized to access the local camera device. Change permission settings and restart the application.";
throw uae;
}
catch (Exception ex)
{
ErrorMessage = ex.Message;
throw ex;
}
// Populate the list of video capture devices (webcams).
// On UWP this uses internally the API:
// Devices.Enumeration.DeviceInformation.FindAllAsync(VideoCapture)
// Note that there's no API to pass a given device to WebRTC,
// so there's no way to monitor and update that list if a device
// gets plugged or unplugged. Even using DeviceInformation.CreateWatcher()
// would yield some devices that might become unavailable by the time
// WebRTC internally opens the video capture device.
// This is more for demo purpose here because using the UWP API is nicer.
var devices = await DeviceVideoTrackSource.GetCaptureDevicesAsync();
var deviceList = new CollectionViewModel <VideoCaptureDeviceInfo>();
foreach (var device in devices)
{
Logger.Log($"Found video capture device: id={device.id} name={device.name}");
deviceList.Add(new VideoCaptureDeviceInfo(id: device.id, displayName: device.name));
}
VideoCaptureDevices = deviceList;
// Auto-select first device for convenience
VideoCaptureDevices.SelectFirstItemIfAny();
}
public async void RefreshVideoProfiles(VideoCaptureDeviceInfo item, VideoProfileKind kind)
{
// Clear formats, which are profile-dependent. This ensures the former list doesn't
// stay visible if the current profile kind is not supported (does not return any profile).
VideoCaptureFormats.Clear();
var videoProfiles = new CollectionViewModel <VideoProfile>();
if (item != null)
{
IReadOnlyList <VideoProfile> profiles = await DeviceVideoTrackSource.GetCaptureProfilesAsync(item.Id, kind);
foreach (var profile in profiles)
{
videoProfiles.Add(profile);
}
}
VideoProfiles = videoProfiles;
// Select first item for convenience
VideoProfiles.SelectFirstItemIfAny();
}
public async Task RefreshVideoCaptureFormatsAsync(VideoCaptureDeviceInfo item)
{
var formats = new CollectionViewModel <VideoCaptureFormatViewModel>();
if (item != null)
{
if (MediaCapture.IsVideoProfileSupported(item.Id))
{
foreach (var desc in VideoProfiles.SelectedItem?.SupportedRecordMediaDescription)
{
var formatVM = new VideoCaptureFormatViewModel();
formatVM.Format.width = desc.Width;
formatVM.Format.height = desc.Height;
formatVM.Format.framerate = desc.FrameRate;
//formatVM.Format.fourcc = desc.Subtype; // TODO: string => FOURCC
formatVM.FormatEncodingDisplayName = desc.Subtype;
formats.Add(formatVM);
}
}
else
{
// Device doesn't support video profiles; fall back on flat list of capture formats.
List <VideoCaptureFormat> formatsList = await PeerConnection.GetVideoCaptureFormatsAsync(item.Id);
foreach (var format in formatsList)
{
formats.Add(new VideoCaptureFormatViewModel
{
Format = format,
FormatEncodingDisplayName = FourCCToString(format.fourcc)
});
}
}
}
VideoCaptureFormats = formats;
// Select first item for convenience
VideoCaptureFormats.SelectFirstItemIfAny();
}
