public async Task JpegThumbnail()
{
TestHelper.BeginTest("Image - JpegThumbnail");
TestHelper.SetConfigurationDefaults();
TestHelper.CleanDirectory("/home/pi/images/tests");
JpegThumbnail tm = new JpegThumbnail(true, 200, 200, 90);
using (var imgCaptureHandler = new ImageStreamCaptureHandler("/home/pi/images/tests", "jpg"))
using (var preview = new MMALNullSinkComponent())
using (var imgEncoder = new MMALImageEncoder(thumbnailConfig: tm))
{
Fixture.MMALCamera.ConfigureCameraSettings();
var portConfig = new MMALPortConfig(MMALEncoding.JPEG, MMALEncoding.I420, 90);
imgEncoder.ConfigureOutputPort(portConfig, imgCaptureHandler);
// Create our component pipeline.
Fixture.MMALCamera.Camera.StillPort
.ConnectTo(imgEncoder);
Fixture.MMALCamera.Camera.PreviewPort
.ConnectTo(preview);
imgCaptureHandler.Manipulate(context =>
{
context.StripBayerMetadata(CameraVersion.OV5647);
}, ImageFormat.Jpeg);
// Camera warm up time
await Task.Delay(2000);
await Fixture.MMALCamera.ProcessAsync(Fixture.MMALCamera.Camera.StillPort);
}
}
/// <summary>
/// Creates a new instance of the <see cref="MMALImageEncoder"/> class with the specified handler.
/// </summary>
/// <param name="rawBayer">Specifies whether to include raw bayer image data.</param>
/// <param name="useExif">Specifies whether any EXIF tags should be used.</param>
/// <param name="continuousCapture">Configure component for rapid capture mode.</param>
/// <param name="thumbnailConfig">Configures the embedded JPEG thumbnail.</param>
/// <param name="exifTags">A collection of custom EXIF tags.</param>
public MMALImageEncoder(bool rawBayer = false, bool useExif = true, bool continuousCapture = false, JpegThumbnail thumbnailConfig = null, params ExifTag[] exifTags)
: base(MMALParameters.MMAL_COMPONENT_DEFAULT_IMAGE_ENCODER)
{
this.RawBayer = rawBayer;
this.UseExif = useExif;
this.ExifTags = exifTags;
this.ContinuousCapture = continuousCapture;
this.JpegThumbnailConfig = thumbnailConfig;
this.Inputs.Add(new InputPort((IntPtr)(&(*this.Ptr->Input[0])), this, Guid.NewGuid()));
if (this.ContinuousCapture)
{
this.Outputs.Add(new FastStillPort((IntPtr)(&(*this.Ptr->Output[0])), this, Guid.NewGuid()));
}
else
{
this.Outputs.Add(new StillPort((IntPtr)(&(*this.Ptr->Output[0])), this, Guid.NewGuid()));
}
}
