libcamera: pipeline: Convert to pragma once

Remove the verbose #ifndef/#define/#endif pattern for maintaining
header idempotency, and replace it with a simple #pragma once.

This simplifies the headers, and prevents redundant changes when
header files get moved.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>

src/libcamera/pipeline/ipu3/cio2.h

@@ -4,8 +4,8 @@
  *
  * cio2.h - Intel IPU3 CIO2
  */
-#ifndef __LIBCAMERA_PIPELINE_IPU3_CIO2_H__
-#define __LIBCAMERA_PIPELINE_IPU3_CIO2_H__
+
+#pragma once
 
 #include <memory>
 #include <queue>
@@ -75,5 +75,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_PIPELINE_IPU3_CIO2_H__ */

src/libcamera/pipeline/ipu3/frames.h

@@ -4,8 +4,8 @@
  *
  * frames.h - Intel IPU3 Frames helper
  */
-#ifndef __LIBCAMERA_PIPELINE_IPU3_FRAMES_H__
-#define __LIBCAMERA_PIPELINE_IPU3_FRAMES_H__
+
+#pragma once
 
 #include <map>
 #include <memory>
@@ -65,5 +65,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_PIPELINE_IPU3_FRAMES_H__ */

src/libcamera/pipeline/ipu3/imgu.h

@@ -4,8 +4,8 @@
  *
  * imgu.h - Intel IPU3 ImgU
  */
-#ifndef __LIBCAMERA_PIPELINE_IPU3_IMGU_H__
-#define __LIBCAMERA_PIPELINE_IPU3_IMGU_H__
+
+#pragma once
 
 #include <memory>
 #include <string>
@@ -122,5 +122,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_PIPELINE_IPU3_IMGU_H__ */

src/libcamera/pipeline/raspberrypi/dma_heaps.h

@@ -4,8 +4,8 @@
  *
  * dma_heaps.h - Helper class for dma-heap allocations.
  */
-#ifndef __LIBCAMERA_PIPELINE_RASPBERRYPI_DMA_HEAPS_H__
-#define __LIBCAMERA_PIPELINE_RASPBERRYPI_DMA_HEAPS_H__
+
+#pragma once
 
 #include <libcamera/file_descriptor.h>
 
@@ -28,5 +28,3 @@ private:
 } /* namespace RPi */
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_PIPELINE_RASPBERRYPI_DMA_HEAPS_H__ */

src/libcamera/pipeline/raspberrypi/rpi_stream.h

@@ -4,8 +4,8 @@
  *
  * rpi_stream.h - Raspberry Pi device stream abstraction class.
  */
-#ifndef __LIBCAMERA_PIPELINE_RPI_STREAM_H__
-#define __LIBCAMERA_PIPELINE_RPI_STREAM_H__
+
+#pragma once
 
 #include <queue>
 #include <string>
@@ -177,5 +177,3 @@ public:
 } /* namespace RPi */
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_PIPELINE_RPI_STREAM_H__ */

src/libcamera/pipeline/rkisp1/rkisp1_path.h

@@ -4,8 +4,8 @@
  *
  * rkisp1path.h - Rockchip ISP1 path helper
  */
-#ifndef __LIBCAMERA_PIPELINE_RKISP1_PATH_H__
-#define __LIBCAMERA_PIPELINE_RKISP1_PATH_H__
+
+#pragma once
 
 #include <memory>
 #include <vector>
@@ -84,5 +84,3 @@ public:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_PIPELINE_RKISP1_PATH_H__ */

src/libcamera/pipeline/simple/converter.h

@@ -5,8 +5,7 @@
  * converter.h - Format converter for simple pipeline handler
  */
 
-#ifndef __LIBCAMERA_PIPELINE_SIMPLE_CONVERTER_H__
-#define __LIBCAMERA_PIPELINE_SIMPLE_CONVERTER_H__
+#pragma once
 
 #include <functional>
 #include <map>
@@ -97,5 +96,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_PIPELINE_SIMPLE_CONVERTER_H__ */