techyian#108 - Allow raw frames to be passed to Image Processors. Do …

…not call Callback Handler if buffer is empty for still ports.

src/MMALSharp.Processing/Handlers/StreamCaptureHandler.cs

@@ -74,7 +74,7 @@ public override void PostProcess()
             }
             catch(Exception e)
             {
-                MMALLog.Logger.LogWarning($"Something went wrong while processing stream: {e.InnerException?.Message}. {e.StackTrace}");
+                MMALLog.Logger.LogWarning($"Something went wrong while processing stream: {e.Message}. {e.InnerException?.Message}. {e.StackTrace}");
             }
         }
 

src/MMALSharp.Processing/Processors/Effects/ConvolutionBase.cs

@@ -82,15 +82,15 @@ public void ApplyConvolution(double[,] kernel, int kernelWidth, int kernelHeight
 
                 Task.WaitAll(t1, t2, t3, t4);
 
-                if (context.Raw)
+                if (context.Raw && context.StoreFormat == null)
                 {
                     store = new byte[bytes];
                     Marshal.Copy(pNative, store, 0, bytes);
                 }
 
                 bmp.UnlockBits(bmpData);
 
-                if (!context.Raw)
+                if (!context.Raw || context.StoreFormat != null)
                 {
                     using (var ms2 = new MemoryStream())
                     {
@@ -128,7 +128,7 @@ private Bitmap LoadBitmap(ImageContext imageContext, MemoryStream stream)
 
                 if (format == default)
                 {
-                    throw new Exception("Unsupported pixel format for Bitmap");
+                    throw new Exception($"Unsupported pixel format for Bitmap: {imageContext.PixelFormat}.");
                 }
 
                 return new Bitmap(imageContext.Resolution.Width, imageContext.Resolution.Height, format);

src/MMALSharp/Components/MMALCameraComponent.cs

@@ -337,7 +337,7 @@ private void InitialiseStill(IOutputCaptureHandler handler)
 
                 portConfig = new MMALPortConfig(
                     encoding,
-                    null,
+                    encoding,
                     width: currentWidth,
                     height: currentHeight,
                     framerate: MMALCameraConfig.Framerate,

src/MMALSharp/Ports/Outputs/OutputPort.cs

@@ -296,10 +296,11 @@ internal virtual void NativeOutputPortCallback(MMAL_PORT_T* port, MMAL_BUFFER_HE
             bufferImpl.PrintProperties();
 
             var failed = bufferImpl.AssertProperty(MMALBufferProperties.MMAL_BUFFER_HEADER_FLAG_TRANSMISSION_FAILED);
-            
+
             var eos = bufferImpl.AssertProperty(MMALBufferProperties.MMAL_BUFFER_HEADER_FLAG_FRAME_END) ||
                       bufferImpl.AssertProperty(MMALBufferProperties.MMAL_BUFFER_HEADER_FLAG_EOS) ||
-                      this.ComponentReference.ForceStopProcessing;
+                      this.ComponentReference.ForceStopProcessing ||
+                      bufferImpl.Length == 0;
 
             if ((bufferImpl.CheckState() && bufferImpl.Length > 0 && !eos && !failed && !this.Trigger.Task.IsCompleted) || (eos && !this.Trigger.Task.IsCompleted))
             {