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;
}
}
private static async Task <MethodResponse> StartTimelapseAsync(MethodRequest methodRequest, ModuleClient moduleClient)
{
try
{
var req = TakeTimelapseRequest.FromJson(methodRequest.DataAsJson);
var response = await camera.StartTimelapseAsync(req);
var responseAsBytes = GetJsonBytes(response);
return(new MethodResponse(
responseAsBytes,
response.Succeded ? (int)HttpStatusCode.OK : (int)HttpStatusCode.Conflict
));
}
catch (Exception ex)
{
Logger.LogError(ex, "Failed to start new timelapse");
return(new MethodResponse(
Encoding.UTF8.GetBytes($"Error starting timelapse: {ex.Message}"),
(int)HttpStatusCode.InternalServerError));
}
}