public static VideoResolutionWidthHeight Get(VideoResolution videoResolution)
{
var videoResolutionWidthHeight = new VideoResolutionWidthHeight();
if (videoResolution == VideoResolution.HD1080p)
{
videoResolutionWidthHeight.Width = 1920;
videoResolutionWidthHeight.Height = 1080;
}
else if (videoResolution == VideoResolution.HD720p)
{
videoResolutionWidthHeight.Width = 1280;
videoResolutionWidthHeight.Height = 720;
}
else if (videoResolution == VideoResolution.SD1024_768)
{
videoResolutionWidthHeight.Width = 1024;
videoResolutionWidthHeight.Height = 768;
}
else if (videoResolution == VideoResolution.SD800_600)
{
videoResolutionWidthHeight.Width = 640;
videoResolutionWidthHeight.Height = 480;
}
else if (videoResolution == VideoResolution.SD640_480)
{
videoResolutionWidthHeight.Width = 640;
videoResolutionWidthHeight.Height = 480;
}
return(videoResolutionWidthHeight);
}
public static void SetSupportedVideoFrameFormats(List <MediaFrameFormat> mediaFrameFormats)
{
VideoSettingsSupported = new JsonArray();
var videoSettings = new List <VideoSetting>();
for (int videoSubTypeId = 0; videoSubTypeId <= 2; videoSubTypeId++)
{
var videoSubType = (VideoSubtype)videoSubTypeId;
for (int videoResolutionId = 0; videoResolutionId <= 4; videoResolutionId++)
{
var videoResolution = (VideoResolution)videoResolutionId;
var videoResolutionWidthHeight = VideoResolutionWidthHeight.Get(videoResolution);
var mediaFrameFormat = mediaFrameFormats.FirstOrDefault(m => m.Subtype == VideoSubtypeHelper.Get((VideoSubtype)videoSubType) &&
m.VideoFormat.Width == videoResolutionWidthHeight.Width &&
m.VideoFormat.Height == videoResolutionWidthHeight.Height);
if (mediaFrameFormat != null)
{
videoSettings.Add(new VideoSetting
{
VideoResolution = videoResolution,
VideoSubtype = videoSubType
});
}
}
}
foreach (var videoSettingGrouped in videoSettings.GroupBy(v => v.VideoSubtype))
{
var videoSubType = VideoSubtypeHelper.Get(videoSettingGrouped.Key);
var videoSettingsSupported = new JsonArray();
foreach (var videoSetting in videoSettingGrouped)
{
videoSettingsSupported.Add(JsonValue.CreateNumberValue((int)videoSetting.VideoResolution));
}
VideoSettingsSupported.Add(new JsonObject
{
{ "VideoSubtype", JsonValue.CreateStringValue(videoSubType) },
{ "VideoResolutions", videoSettingsSupported }
});
}
}
public static async Task <VideoSetting> Read(List <MediaFrameFormat> mediaFrameFormats)
{
VideoSetting videoSetting = null;
JsonObject configuration = null;
var configurationFileExists = await ApplicationData.Current.LocalFolder.TryGetItemAsync(CONFIGURATION_FILE_NAME);
if (configurationFileExists != null)
{
var configurationFile = await ApplicationData.Current.LocalFolder.GetFileAsync(CONFIGURATION_FILE_NAME);
configuration = JsonObject.Parse(await FileIO.ReadTextAsync(configurationFile));
}
if (configuration != null)
{
var videoResolution = (VideoResolution)configuration["VideoResolution"].GetNumber();
var videoResolutionWidthHeight = VideoResolutionWidthHeight.Get(videoResolution);
var videoSubType = configuration["VideoSubtype"].GetString();
var videoQuality = configuration["VideoQuality"].GetNumber();
var usedThreads = configuration["UsedThreads"].GetNumber();
var mediaFrameFormat = mediaFrameFormats.Where(m => m.Subtype == videoSubType &&
m.VideoFormat.Width == videoResolutionWidthHeight.Width &&
m.VideoFormat.Height == videoResolutionWidthHeight.Height)
.OrderByDescending(m => m.FrameRate.Numerator / m.FrameRate.Denominator)
.FirstOrDefault();
if (mediaFrameFormat != null)
{
videoSetting = new VideoSetting
{
VideoResolution = videoResolution,
VideoSubtype = VideoSubtypeHelper.Get(videoSubType),
VideoQuality = videoQuality,
UsedThreads = (int)usedThreads
};
}
}
else
{
for (int videoSubType = 0; videoSubType <= 2; videoSubType++)
{
if (videoSetting != null)
{
break;
}
for (int videoResolutionId = 4; videoResolutionId >= 0; videoResolutionId--)
{
var videoResolutionLowWidthHeight = VideoResolutionWidthHeight.Get((VideoResolution)videoResolutionId);
var mediaFrameFormat = mediaFrameFormats.Where(m => m.Subtype == VideoSubtypeHelper.Get((VideoSubtype)videoSubType) &&
m.VideoFormat.Width == videoResolutionLowWidthHeight.Width &&
m.VideoFormat.Height == videoResolutionLowWidthHeight.Height)
.OrderByDescending(m => m.FrameRate.Numerator / m.FrameRate.Denominator)
.FirstOrDefault();
if (mediaFrameFormat != null)
{
videoSetting = new VideoSetting
{
VideoResolution = VideoResolution.SD640_480,
VideoSubtype = (VideoSubtype)videoSubType,
VideoQuality = 0.6,
UsedThreads = 1
};
break;
}
}
}
}
if (videoSetting != null)
{
VideoSetting = new JsonObject
{
{ "VideoResolution", JsonValue.CreateNumberValue((int)videoSetting.VideoResolution) },
{ "VideoSubtype", JsonValue.CreateStringValue(VideoSubtypeHelper.Get(videoSetting.VideoSubtype)) },
{ "VideoQuality", JsonValue.CreateNumberValue(videoSetting.VideoQuality) },
{ "UsedThreads", JsonValue.CreateNumberValue(videoSetting.UsedThreads) }
};
return(videoSetting);
}
else
{
throw new Exception("Webcam not supported. Could not found correct video resolution and subtype. Please change code.");
}
}
public async Task Initialize(VideoSetting videoSetting)
{
await DispatcherHelper.RunAndAwaitAsync(CoreApplication.MainView.CoreWindow.Dispatcher, CoreDispatcherPriority.Normal, async() =>
// await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsyncRunAndAwaitAsync(CoreDispatcherPriority.Normal, async () =>
{
_threadsCount = videoSetting.UsedThreads;
_stoppedThreads = videoSetting.UsedThreads;
_lastFrameAdded.Start();
_imageQuality = new BitmapPropertySet();
var imageQualityValue = new BitmapTypedValue(videoSetting.VideoQuality, Windows.Foundation.PropertyType.Single);
_imageQuality.Add("ImageQuality", imageQualityValue);
_mediaCapture = new MediaCapture();
var frameSourceGroups = await MediaFrameSourceGroup.FindAllAsync();
var settings = new MediaCaptureInitializationSettings()
{
SharingMode = MediaCaptureSharingMode.ExclusiveControl,
//With CPU the results contain always SoftwareBitmaps, otherwise with GPU
//they preferring D3DSurface
MemoryPreference = MediaCaptureMemoryPreference.Cpu,
//Capture only video, no audio
StreamingCaptureMode = StreamingCaptureMode.Video
};
await _mediaCapture.InitializeAsync(settings);
var mediaFrameSource = _mediaCapture.FrameSources.First().Value;
var videoDeviceController = mediaFrameSource.Controller.VideoDeviceController;
videoDeviceController.DesiredOptimization = Windows.Media.Devices.MediaCaptureOptimization.Quality;
videoDeviceController.PrimaryUse = Windows.Media.Devices.CaptureUse.Video;
//Set exposure (auto light adjustment)
if (_mediaCapture.VideoDeviceController.Exposure.Capabilities.Supported &&
_mediaCapture.VideoDeviceController.Exposure.Capabilities.AutoModeSupported)
{
_mediaCapture.VideoDeviceController.Exposure.TrySetAuto(true);
}
var videoResolutionWidthHeight = VideoResolutionWidthHeight.Get(videoSetting.VideoResolution);
var videoSubType = VideoSubtypeHelper.Get(videoSetting.VideoSubtype);
//Set resolution, frame rate and video subtyp
var videoFormat = mediaFrameSource.SupportedFormats.Where(sf => sf.VideoFormat.Width == videoResolutionWidthHeight.Width &&
sf.VideoFormat.Height == videoResolutionWidthHeight.Height &&
sf.Subtype == videoSubType)
.OrderByDescending(m => m.FrameRate.Numerator / m.FrameRate.Denominator)
.First();
await mediaFrameSource.SetFormatAsync(videoFormat);
_mediaFrameReader = await _mediaCapture.CreateFrameReaderAsync(mediaFrameSource);
await _mediaFrameReader.StartAsync();
});
}
