/// <summary>
/// Called once all the subscriptions are established.
/// </summary>
private void OnPipelineStart()
{
MediaCaptureDevice.Initialize();
CaptureFormat found = null;
foreach (var device in MediaCaptureDevice.AllDevices)
{
if (!device.Attach(this.configuration.UseInSharedMode))
{
continue;
}
Trace.WriteLine($"MediaCapture - Searching for width={this.configuration.Width} height={this.configuration.Height} deviceId={this.configuration.DeviceId}");
Trace.WriteLine($"MediaCapture - Found: Name: '{device.FriendlyName}' SymLink: {device.SymbolicLink}");
Trace.WriteLine($"MediaCapture - Current - Width: {device.CurrentFormat.nWidth} Height: {device.CurrentFormat.nHeight} Type: {device.CurrentFormat.subType.Name}/{device.CurrentFormat.subType.Guid} Framerate: {device.CurrentFormat.nFrameRateNumerator}/{device.CurrentFormat.nFrameRateDenominator}");
if (string.IsNullOrEmpty(this.configuration.DeviceId) || device.FriendlyName == this.configuration.DeviceId || device.SymbolicLink == this.configuration.DeviceId)
{
foreach (var format in device.Formats)
{
Trace.WriteLine($"MediaCapture - Supported - Width: {format.nWidth} Height: {format.nHeight} Type: {format.subType.Name}/{format.subType.Guid} Framerate: {format.nFrameRateNumerator}/{format.nFrameRateDenominator}");
if (this.configuration.Width == format.nWidth && this.configuration.Height == format.nHeight)
{
// found suitable width/height
if (this.configuration.Framerate == format.nFrameRateNumerator / format.nFrameRateDenominator)
{
// found suitable framerate
if (found == null || this.configuration.Framerate == found.nFrameRateNumerator / found.nFrameRateDenominator)
{
// found first suitable or closer framerate match
this.camera = device;
found = format;
}
}
}
}
}
if (found != null)
{
Trace.WriteLine($"MediaCapture - Using - Width: {found.nWidth} Height: {found.nHeight} Type: {found.subType.Name}/{found.subType.Guid} Framerate: {found.nFrameRateNumerator}/{found.nFrameRateDenominator}");
break;
}
}
if (found != null)
{
this.camera.CurrentFormat = found;
this.deviceInfo = new MediaCaptureInfo(this.camera);
var width = this.camera.CurrentFormat.nWidth;
var height = this.camera.CurrentFormat.nHeight;
// Get default settings for other properties.
var currentConfig = this.GetDeviceConfiguration();
this.configuration.BacklightCompensation = currentConfig.BacklightCompensation;
this.configuration.Brightness = currentConfig.Brightness;
this.configuration.ColorEnable = currentConfig.ColorEnable;
this.configuration.Contrast = currentConfig.Contrast;
this.configuration.Gain = currentConfig.Gain;
this.configuration.Gamma = currentConfig.Gamma;
this.configuration.Hue = currentConfig.Hue;
this.configuration.Saturation = currentConfig.Saturation;
this.configuration.Sharpness = currentConfig.Sharpness;
this.configuration.WhiteBalance = currentConfig.WhiteBalance;
this.configuration.Focus = currentConfig.Focus;
this.SetDeviceConfiguration(this.configuration);
this.camera.CaptureSample((data, length, timestamp) =>
{
var time = DateTime.FromFileTimeUtc(timestamp);
using (var sharedImage = ImagePool.GetOrCreate(this.configuration.Width, this.configuration.Height, Microsoft.Psi.Imaging.PixelFormat.BGR_24bpp))
{
sharedImage.Resource.CopyFrom(data);
var originatingTime = this.pipeline.GetCurrentTimeFromElapsedTicks(timestamp);
this.Out.Post(sharedImage, originatingTime);
}
});
}
else
{
throw new ArgumentException("Camera specification not found");
}
}
/// <inheritdoc/>
public void Start(Action <DateTime> notifyCompletionTime)
{
// notify that this is an infinite source component
notifyCompletionTime(DateTime.MaxValue);
MediaCaptureDevice.Initialize();
CaptureFormat found = null;
foreach (var device in MediaCaptureDevice.AllDevices)
{
if (!device.Attach(this.configuration.UseInSharedMode))
{
continue;
}
// Trace.WriteLine($"MediaCapture - Searching for width={this.configuration.Width} height={this.configuration.Height} deviceId={this.configuration.DeviceId}");
// Trace.WriteLine($"MediaCapture - Found: Name: '{device.FriendlyName}' SymLink: {device.SymbolicLink}");
// Trace.WriteLine($"MediaCapture - Current - Width: {device.CurrentFormat.nWidth} Height: {device.CurrentFormat.nHeight} Type: {device.CurrentFormat.subType.Name}/{device.CurrentFormat.subType.Guid} Framerate: {device.CurrentFormat.nFrameRateNumerator}/{device.CurrentFormat.nFrameRateDenominator}");
if (string.IsNullOrEmpty(this.configuration.DeviceId) || device.FriendlyName == this.configuration.DeviceId || device.SymbolicLink == this.configuration.DeviceId)
{
foreach (var format in device.Formats)
{
// Trace.WriteLine($"MediaCapture - Supported - Width: {format.nWidth} Height: {format.nHeight} Type: {format.subType.Name}/{format.subType.Guid} Framerate: {format.nFrameRateNumerator}/{format.nFrameRateDenominator}");
if (this.configuration.Width == format.nWidth && this.configuration.Height == format.nHeight)
{
// found suitable width/height
if (this.configuration.Framerate == format.nFrameRateNumerator / format.nFrameRateDenominator)
{
// found suitable framerate
if (found == null || this.configuration.Framerate == found.nFrameRateNumerator / found.nFrameRateDenominator)
{
// found first suitable or closer framerate match
this.camera = device;
found = format;
}
}
}
}
}
if (found != null)
{
// Trace.WriteLine($"MediaCapture - Using - Width: {found.nWidth} Height: {found.nHeight} Type: {found.subType.Name}/{found.subType.Guid} Framerate: {found.nFrameRateNumerator}/{found.nFrameRateDenominator}");
break;
}
}
if (found != null)
{
this.camera.CurrentFormat = found;
this.deviceInfo = new MediaCaptureInfo(this.camera);
var width = this.camera.CurrentFormat.nWidth;
var height = this.camera.CurrentFormat.nHeight;
// Get default settings for other properties.
var currentConfig = this.GetDeviceConfiguration();
this.configuration.BacklightCompensation = currentConfig.BacklightCompensation;
this.configuration.Brightness = currentConfig.Brightness;
this.configuration.ColorEnable = currentConfig.ColorEnable;
this.configuration.Contrast = currentConfig.Contrast;
this.configuration.Gain = currentConfig.Gain;
this.configuration.Gamma = currentConfig.Gamma;
this.configuration.Hue = currentConfig.Hue;
this.configuration.Saturation = currentConfig.Saturation;
this.configuration.Sharpness = currentConfig.Sharpness;
this.configuration.WhiteBalance = currentConfig.WhiteBalance;
this.configuration.Focus = currentConfig.Focus;
this.SetDeviceConfiguration(this.configuration);
this.camera.CaptureSample((data, length, timestamp) =>
{
var time = DateTime.FromFileTimeUtc(timestamp);
using var sharedImage = ImagePool.GetOrCreate(this.configuration.Width, this.configuration.Height, PixelFormat.BGR_24bpp);
sharedImage.Resource.CopyFrom(data);
var originatingTime = this.pipeline.GetCurrentTimeFromElapsedTicks(timestamp);
this.Out.Post(sharedImage, originatingTime);
});
}
else
{
// Requested camera capture format was not found. Construct an exception message with a list of supported formats.
var exceptionMessageBuilder = new StringBuilder();
if (string.IsNullOrEmpty(this.configuration.DeviceId))
{
exceptionMessageBuilder.Append($"No cameras were found that support the requested capture format of {this.configuration.Width}x{this.configuration.Height} @ {this.configuration.Framerate} fps. ");
}
else
{
exceptionMessageBuilder.Append($"The specified camera {this.configuration.DeviceId} does not support the requested capture format of {this.configuration.Width}x{this.configuration.Height} @ {this.configuration.Framerate} fps. ");
}
exceptionMessageBuilder.AppendLine("Use one of the following supported camera capture formats instead:");
this.AppendSupportedCaptureFormats(exceptionMessageBuilder);
throw new ArgumentException(exceptionMessageBuilder.ToString());
}
}
