libcamera: Use PixelFormat instead of unsigned int where appropriate

Use the PixelFormat instead of unsigned int where a pixel format is to
be used. PixelFormat is defined as an unsigned int but is about to be
turned into a class to add functionality.

There is no functional change in this patch.

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

src/libcamera/pipeline/ipu3/ipu3.cpp

@@ -349,7 +349,7 @@ CameraConfiguration::Status IPU3CameraConfiguration::validate()
 
 	for (unsigned int i = 0; i < config_.size(); ++i) {
 		StreamConfiguration &cfg = config_[i];
-		const unsigned int pixelFormat = cfg.pixelFormat;
+		const PixelFormat pixelFormat = cfg.pixelFormat;
 		const Size size = cfg.size;
 		const IPU3Stream *stream;
 

src/libcamera/pipeline/rkisp1/rkisp1.cpp

@@ -433,7 +433,7 @@ RkISP1CameraConfiguration::RkISP1CameraConfiguration(Camera *camera,
 
 CameraConfiguration::Status RkISP1CameraConfiguration::validate()
 {
-	static const std::array<unsigned int, 8> formats{
+	static const std::array<PixelFormat, 8> formats{
 		DRM_FORMAT_YUYV,
 		DRM_FORMAT_YVYU,
 		DRM_FORMAT_VYUY,

src/libcamera/pipeline/uvcvideo.cpp

@@ -107,10 +107,10 @@ CameraConfiguration::Status UVCCameraConfiguration::validate()
 
 	StreamConfiguration &cfg = config_[0];
 	const StreamFormats &formats = cfg.formats();
-	const unsigned int pixelFormat = cfg.pixelFormat;
+	const PixelFormat pixelFormat = cfg.pixelFormat;
 	const Size size = cfg.size;
 
-	const std::vector<unsigned int> pixelFormats = formats.pixelformats();
+	const std::vector<PixelFormat> pixelFormats = formats.pixelformats();
 	auto iter = std::find(pixelFormats.begin(), pixelFormats.end(), pixelFormat);
 	if (iter == pixelFormats.end()) {
 		cfg.pixelFormat = pixelFormats.front();

src/libcamera/pipeline/vimc.cpp

@@ -106,7 +106,7 @@ private:
 
 namespace {
 
-constexpr std::array<unsigned int, 3> pixelformats{
+constexpr std::array<PixelFormat, 3> pixelformats{
 	DRM_FORMAT_RGB888,
 	DRM_FORMAT_BGR888,
 	DRM_FORMAT_BGRA8888,
@@ -177,7 +177,7 @@ CameraConfiguration *PipelineHandlerVimc::generateConfiguration(Camera *camera,
 
 	ImageFormats formats;
 
-	for (unsigned int pixelformat : pixelformats) {
+	for (PixelFormat pixelformat : pixelformats) {
 		/* The scaler hardcodes a x3 scale-up ratio. */
 		std::vector<SizeRange> sizes{
 			SizeRange{ 48, 48, 4096, 2160 }