private static async Task VideoWorkerDoWork(
CameraVideoSettings settings,
Action <byte[]> onDataCallback,
Action onExitCallback)
{
try
{
await ProcessRunner.RunProcessAsync(
settings.CommandName,
settings.CreateProcessArguments(),
(data, proc) => onDataCallback?.Invoke(data),
null,
true,
_videoTokenSource.Token);
onExitCallback?.Invoke();
}
catch
{
// swallow
}
finally
{
Instance.CloseVideoStream();
OperationDone.Set();
}
}
/// <summary>
/// Opens the video stream with a timeout of 0 (running indefinitely) at 1080p resolution, variable bitrate and 25 FPS.
/// No preview is shown
/// </summary>
/// <param name="onDataCallback">The on data callback.</param>
/// <param name="onExitCallback">The on exit callback.</param>
public void OpenVideoStream(Action <byte[]> onDataCallback, Action onExitCallback = null)
{
var settings = new CameraVideoSettings
{
CaptureTimeoutMilliseconds = 0,
CaptureDisplayPreview = false,
CaptureWidth = 1920,
CaptureHeight = 1080
};
OpenVideoStream(settings, onDataCallback, onExitCallback);
}
/// <summary>
/// Opens the video stream with the supplied settings. Capture Timeout Milliseconds has to be 0 or greater
/// </summary>
/// <param name="settings">The settings.</param>
/// <param name="onDataCallback">The on data callback.</param>
/// <param name="onExitCallback">The on exit callback.</param>
/// <exception cref="InvalidOperationException">Cannot use camera module because it is currently busy.</exception>
/// <exception cref="ArgumentException">CaptureTimeoutMilliseconds</exception>
public void OpenVideoStream(CameraVideoSettings settings, Action <byte[]> onDataCallback, Action onExitCallback)
{
if (Instance.IsBusy)
{
throw new InvalidOperationException("Cannot use camera module because it is currently busy.");
}
if (settings.CaptureTimeoutMilliseconds < 0)
{
throw new ArgumentException($"{nameof(settings.CaptureTimeoutMilliseconds)} needs to be greater than or equal to 0");
}
try
{
OperationDone.Reset();
_videoStreamTask = Task.Factory.StartNew(() => VideoWorkerDoWork(settings, onDataCallback, onExitCallback), _videoTokenSource.Token);
}
catch
{
OperationDone.Set();
throw;
}
}