libcamera: formats: Add RGB565_BE format

This new format corresponds to the V4L2 V4L2_PIX_FMT_RGB565X format, and
is the big-endian version of the DRM_FORMAT_RGB565 format.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

src/libcamera/formats.cpp

@@ -155,6 +155,16 @@ const std::map<PixelFormat, PixelFormatInfo> pixelFormatInfo{
 		.pixelsPerGroup = 1,
 		.planes = {{ { 3, 1 }, { 0, 0 }, { 0, 0 } }},
 	} },
+	{ formats::RGB565_BE, {
+		.name = "RGB565_BE",
+		.format = formats::RGB565_BE,
+		.v4l2Format = V4L2PixelFormat(V4L2_PIX_FMT_RGB565X),
+		.bitsPerPixel = 16,
+		.colourEncoding = PixelFormatInfo::ColourEncodingRGB,
+		.packed = false,
+		.pixelsPerGroup = 1,
+		.planes = {{ { 3, 1 }, { 0, 0 }, { 0, 0 } }},
+	} },
 	{ formats::BGR888, {
 		.name = "BGR888",
 		.format = formats::BGR888,

src/libcamera/formats.yaml

@@ -10,6 +10,9 @@ formats:
 
   - RGB565:
       fourcc: DRM_FORMAT_RGB565
+  - RGB565_BE:
+      fourcc: DRM_FORMAT_RGB565
+      big_endian: true
 
   - RGB888:
       fourcc: DRM_FORMAT_RGB888

src/libcamera/v4l2_pixelformat.cpp

@@ -47,6 +47,7 @@ namespace {
 const std::map<V4L2PixelFormat, PixelFormat> vpf2pf{
 	/* RGB formats. */
 	{ V4L2PixelFormat(V4L2_PIX_FMT_RGB565), formats::RGB565 },
+	{ V4L2PixelFormat(V4L2_PIX_FMT_RGB565X), formats::RGB565_BE },
 	{ V4L2PixelFormat(V4L2_PIX_FMT_RGB24), formats::BGR888 },
 	{ V4L2PixelFormat(V4L2_PIX_FMT_BGR24), formats::RGB888 },
 	{ V4L2PixelFormat(V4L2_PIX_FMT_XBGR32), formats::XRGB8888 },