public async Task TakePicturesAsync(string filename, TimeSpan duration, int msWaitBetweenPictures)
{
try
{
// Singleton initialized lazily. Reference once in your application.
MMALCamera cam = this.MMALSharpCameraInstance;
MMALCameraConfig.StillResolution = new Resolution(1080, 920);
cam.ConfigureCameraSettings();
using (var imgCaptureHandler = new IndexedImageStreamCaptureHandler(filename))
{
Console.WriteLine($"Current filename in handler: {imgCaptureHandler.CurrentFilename}");
var cts = new CancellationTokenSource(duration);
var timelapse = new Timelapse
{
Mode = TimelapseMode.Millisecond,
Value = msWaitBetweenPictures,
CancellationToken = cts.Token
};
await cam.TakePictureTimelapse(imgCaptureHandler, MMALEncoding.JPEG, MMALEncoding.I420, timelapse);
}
// Cleanup disposes all unmanaged resources and unloads Broadcom library. To be called when no more processing is to be done
// on the camera.
Console.WriteLine($"Wrote picture to: {filename} with running index");
}
catch (Exception ex)
{
Console.WriteLine($"{nameof(MMALSharpCamera)} {nameof(TakePictureAsync)} Failed");
Console.WriteLine($"{nameof(MMALSharpCamera)} {nameof(TakePictureAsync)} {ex.ToString()}");
Console.WriteLine($"{nameof(MMALSharpCamera)} {nameof(TakePictureAsync)} Failed");
}
}
public async Task <TakeTimelapseResponse> StartTimelapseAsync(TakeTimelapseRequest req)
{
if (IsTakingTimelapse())
{
return(new TakeTimelapseResponse()
{
ErrorMessage = $"Timelapse {currentTimelapseId?.ToString()} is being taken",
});
}
var cameraUsed = false;
try
{
var path = EnsureLocalDirectoryExists();
currentTimelapseId = Guid.NewGuid().ToString();
var pathForImages = Path.Combine(path, currentTimelapseId);
await cameraInUse.WaitAsync();
cameraUsed = true;
// This example will take an image every 10 seconds for 4 hours
var imgCaptureHandler = new ImageStreamCaptureHandler(pathForImages, "jpg");
timelapseCts = new CancellationTokenSource(TimeSpan.FromSeconds(req.Duration));
var tl = new Timelapse {
Mode = TimelapseMode.Second, CancellationToken = timelapseCts.Token, Value = req.Interval
};
Logger.Log($"Starting timelapse {currentTimelapseId}");
_ = camera.TakePictureTimelapse(imgCaptureHandler, MMALEncoding.JPEG, MMALEncoding.I420, tl)
.ContinueWith(async(t) => await PrepareTimelapseVideoAsync(t, imgCaptureHandler, pathForImages));
return(new TakeTimelapseResponse()
{
Id = currentTimelapseId,
Duration = req.Duration,
Interval = req.Interval,
});
}
catch
{
if (cameraUsed)
{
cameraInUse.Release();
}
throw;
}
}