samples: video: tcpserversink: nv12 support

Add YUV420 semi-planar support (NV12).
This is the video encoder prefered pixel format.

Signed-off-by: Hugues Fruchet <[email protected]>

Author: hfruchet-st

samples/drivers/video/tcpserversink/src/main.c

@@ -334,7 +334,10 @@ int main(void)
 
 	/* Size to allocate for each buffer */
 	if (caps.min_line_count == LINE_COUNT_HEIGHT) {
-		bsize = fmt.pitch * fmt.height;
+		if (fmt.pixelformat == VIDEO_PIX_FMT_NV12)
+			bsize = fmt.width * fmt.height * 3 / 2;
+		else
+			bsize = fmt.pitch * fmt.height;
 	} else {
 		bsize = fmt.pitch * caps.min_line_count;
 	}