libcamera: formats: Add RGB48 formats

Add support for 16-bps (48-bpp) RGB output formats to libcamera. These
new formats are defined for the RGB and BGR ordering.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/formats.cpp

@@ -270,6 +270,26 @@ const std::map<PixelFormat, PixelFormatInfo> pixelFormatInfo{
 		.pixelsPerGroup = 1,
 		.planes = {{ { 4, 1 }, { 0, 0 }, { 0, 0 } }},
 	} },
+	{ formats::BGR161616, {
+		.name = "BGR161616",
+		.format = formats::BGR161616,
+		.v4l2Formats = { V4L2PixelFormat(V4L2_PIX_FMT_RGB48), },
+		.bitsPerPixel = 48,
+		.colourEncoding = PixelFormatInfo::ColourEncodingRGB,
+		.packed = false,
+		.pixelsPerGroup = 1,
+		.planes = {{ { 3, 1 }, { 0, 0 }, { 0, 0 } }},
+	} },
+	{ formats::RGB161616, {
+		.name = "RGB161616",
+		.format = formats::RGB161616,
+		.v4l2Formats = { V4L2PixelFormat(V4L2_PIX_FMT_BGR48), },
+		.bitsPerPixel = 48,
+		.colourEncoding = PixelFormatInfo::ColourEncodingRGB,
+		.packed = false,
+		.pixelsPerGroup = 1,
+		.planes = {{ { 3, 1 }, { 0, 0 }, { 0, 0 } }},
+	} },
 
 	/* YUV packed formats. */
 	{ formats::YUYV, {

src/libcamera/formats.yaml

@@ -43,6 +43,11 @@ formats:
   - BGRA8888:
       fourcc: DRM_FORMAT_BGRA8888
 
+  - RGB161616:
+      fourcc: DRM_FORMAT_RGB161616
+  - BGR161616:
+      fourcc: DRM_FORMAT_BGR161616
+
   - YUYV:
       fourcc: DRM_FORMAT_YUYV
   - YVYU:

src/libcamera/v4l2_pixelformat.cpp

@@ -71,6 +71,10 @@ const std::map<V4L2PixelFormat, V4L2PixelFormat::Info> vpf2pf{
 		{ formats::BGRA8888, "32-bit ARGB 8-8-8-8" } },
 	{ V4L2PixelFormat(V4L2_PIX_FMT_BGRA32),
 		{ formats::RGBA8888, "32-bit ABGR 8-8-8-8" } },
+	{ V4L2PixelFormat(V4L2_PIX_FMT_RGB48),
+		{ formats::BGR161616, "48-bit RGB 16-16-16" } },
+	{ V4L2PixelFormat(V4L2_PIX_FMT_BGR48),
+		{ formats::RGB161616, "48-bit BGR 16-16-16" } },
 
 	/* YUV packed formats. */
 	{ V4L2PixelFormat(V4L2_PIX_FMT_YUYV),