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 Write(VideoSetting videoSetting)
{
var localFolder = ApplicationData.Current.LocalFolder;
var configurationFile = await localFolder.CreateFileAsync(CONFIGURATION_FILE_NAME, CreationCollisionOption.OpenIfExists);
var configuration = 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) }
};
VideoSetting = configuration;
await FileIO.WriteTextAsync(configurationFile, configuration.Stringify());
}
private async Task WriteResponse(HttpServerRequest request, StreamSocket socket)
{
//System.Diagnostics.Debug.WriteLine("WriteResponse");
var relativeUrlLower = request.Url.ToLowerInvariant();
var outputStream = socket.OutputStream;
//Get javascript files
if (relativeUrlLower.StartsWith("/javascript"))
{
await HttpServerResponse.WriteResponseFile(ToFolderPath(request.Url), HttpContentType.JavaScript, outputStream);
}
//Get css style files
else if (relativeUrlLower.StartsWith("/styles"))
{
await HttpServerResponse.WriteResponseFile(ToFolderPath(request.Url), HttpContentType.Css, outputStream);
}
//Get video setting
else if (relativeUrlLower.StartsWith("/videosetting"))
{
HttpServerResponse.WriteResponseJson(ConfigurationFile.VideoSetting.Stringify(), outputStream);
}
//Get supported video settings
else if (relativeUrlLower.StartsWith("/supportedvideosettings"))
{
HttpServerResponse.WriteResponseJson(ConfigurationFile.VideoSettingsSupported.Stringify(), outputStream);
}
//Set video settings
else if (relativeUrlLower.StartsWith("/savevideosetting"))
{
await _camera.Stop();
var videoSetting = new VideoSetting
{
VideoSubtype = VideoSubtypeHelper.Get(request.Body["VideoSubtype"].GetString()),
VideoResolution = (VideoResolution)request.Body["VideoResolution"].GetNumber(),
VideoQuality = request.Body["VideoQuality"].GetNumber(),
UsedThreads = (int)request.Body["UsedThreads"].GetNumber()
};
await ConfigurationFile.Write(videoSetting);
await _camera.Initialize(videoSetting);
_camera.Start();
HttpServerResponse.WriteResponseOk(outputStream);
}
//Get current camera frame
else if (relativeUrlLower.StartsWith("/videoframe"))
{
if (_camera.Frame != null)
{
var webSocket = new WebSocket(socket, request, _camera);
await webSocket.Start();
}
else
{
HttpServerResponse.WriteResponseError("Not camera fram available. Maybe there is an error or camera is not started.", outputStream);
}
}
//Get index.html page
else
{
await HttpServerResponse.WriteResponseFile(@"\Html\Index.html", HttpContentType.Html, outputStream);
}
}
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();
});
}
