libcamera: Add support for planar YVU420 format

Add support for planar YVU420.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/formats.cpp

@@ -407,6 +407,16 @@ const std::map<PixelFormat, PixelFormatInfo> pixelFormatInfo{
 		.pixelsPerGroup = 2,
 		.planes = {{ { 2, 1 }, { 1, 2 }, { 1, 2 } }},
 	} },
+	{ formats::YVU420, {
+		.name = "YVU420",
+		.format = PixelFormat(formats::YVU420),
+		.v4l2Format = V4L2PixelFormat(V4L2_PIX_FMT_YVU420),
+		.bitsPerPixel = 12,
+		.colourEncoding = PixelFormatInfo::ColourEncodingYUV,
+		.packed = false,
+		.pixelsPerGroup = 2,
+		.planes = {{ { 2, 1 }, { 1, 2 }, { 1, 2 } }},
+	} },
 	{ formats::YUV422, {
 		.name = "YUV422",
 		.format = PixelFormat(formats::YUV422),

src/libcamera/formats.yaml

@@ -55,6 +55,8 @@ formats:
 
   - YUV420:
       fourcc: DRM_FORMAT_YUV420
+  - YVU420:
+      fourcc: DRM_FORMAT_YVU420
   - YUV422:
       fourcc: DRM_FORMAT_YUV422
 

src/libcamera/v4l2_pixelformat.cpp

@@ -64,6 +64,7 @@ const std::map<V4L2PixelFormat, PixelFormat> vpf2pf{
 	{ V4L2PixelFormat(V4L2_PIX_FMT_NV12), formats::NV12 },
 	{ V4L2PixelFormat(V4L2_PIX_FMT_NV21), formats::NV21 },
 	{ V4L2PixelFormat(V4L2_PIX_FMT_YUV420), formats::YUV420 },
+	{ V4L2PixelFormat(V4L2_PIX_FMT_YVU420), formats::YVU420 },
 	{ V4L2PixelFormat(V4L2_PIX_FMT_YUV422P), formats::YUV422 },
 
 	/* Greyscale formats. */