[PATCH v4 03/11] libcamera: formats: Add a helper to check for a raw pixel format

[Milan Zamazal]

There are several places with the same pattern to check whether a given
pixel format is a raw format:

  return libcamera::PixelFormatInfo::info(pixFmt).colourEncoding ==
         libcamera::PixelFormatInfo::ColourEncodingRAW;

Let's move the corresponding isFormatRaw helper from mali-c55.cpp to
formats.cpp and use it where applicable.  This also avoids a need to
introduce the same helper (or the same pattern) in the followup patches.

Signed-off-by: Milan Zamazal <mzamazal at redhat.com>
---
 include/libcamera/internal/formats.h         |  2 ++
 src/libcamera/formats.cpp                    | 11 +++++++++++
 src/libcamera/pipeline/imx8-isi/imx8-isi.cpp |  4 ++--
 src/libcamera/pipeline/mali-c55/mali-c55.cpp | 10 ----------
 src/libcamera/pipeline/rkisp1/rkisp1.cpp     |  7 ++-----
 5 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/include/libcamera/internal/formats.h b/include/libcamera/internal/formats.h
index 6a3e9c16..bc4417d0 100644
--- a/include/libcamera/internal/formats.h
+++ b/include/libcamera/internal/formats.h
@@ -62,4 +62,6 @@ public:
 	std::array<Plane, 3> planes;
 };
 
+bool isFormatRaw(const libcamera::PixelFormat &pixFmt);
+
 } /* namespace libcamera */
diff --git a/src/libcamera/formats.cpp b/src/libcamera/formats.cpp
index bfcdfc08..c6e0a262 100644
--- a/src/libcamera/formats.cpp
+++ b/src/libcamera/formats.cpp
@@ -1215,4 +1215,15 @@ unsigned int PixelFormatInfo::numPlanes() const
 	return count;
 }
 
+/**
+ * \brief Return whether the given pixel format is a raw format
+ * \param[in] pixFmt The pixel format to examine
+ * \return True iff the given format is a raw format
+ */
+bool isFormatRaw(const libcamera::PixelFormat &pixFmt)
+{
+	return libcamera::PixelFormatInfo::info(pixFmt).colourEncoding ==
+	       libcamera::PixelFormatInfo::ColourEncodingRAW;
+}
+
 } /* namespace libcamera */
diff --git a/src/libcamera/pipeline/imx8-isi/imx8-isi.cpp b/src/libcamera/pipeline/imx8-isi/imx8-isi.cpp
index 4e66b336..9ff11a41 100644
--- a/src/libcamera/pipeline/imx8-isi/imx8-isi.cpp
+++ b/src/libcamera/pipeline/imx8-isi/imx8-isi.cpp
@@ -24,6 +24,7 @@
 #include "libcamera/internal/camera.h"
 #include "libcamera/internal/camera_sensor.h"
 #include "libcamera/internal/device_enumerator.h"
+#include "libcamera/internal/formats.h"
 #include "libcamera/internal/media_device.h"
 #include "libcamera/internal/pipeline_handler.h"
 #include "libcamera/internal/v4l2_subdevice.h"
@@ -312,8 +313,7 @@ unsigned int ISICameraData::getYuvMediaBusFormat(const PixelFormat &pixelFormat)
 
 unsigned int ISICameraData::getMediaBusFormat(PixelFormat *pixelFormat) const
 {
-	if (PixelFormatInfo::info(*pixelFormat).colourEncoding ==
-	    PixelFormatInfo::ColourEncodingRAW)
+	if (isFormatRaw(*pixelFormat))
 		return getRawMediaBusFormat(pixelFormat);
 
 	return getYuvMediaBusFormat(*pixelFormat);
diff --git a/src/libcamera/pipeline/mali-c55/mali-c55.cpp b/src/libcamera/pipeline/mali-c55/mali-c55.cpp
index a05e11fc..3721fb30 100644
--- a/src/libcamera/pipeline/mali-c55/mali-c55.cpp
+++ b/src/libcamera/pipeline/mali-c55/mali-c55.cpp
@@ -42,16 +42,6 @@
 #include "libcamera/internal/v4l2_subdevice.h"
 #include "libcamera/internal/v4l2_videodevice.h"
 
-namespace {
-
-bool isFormatRaw(const libcamera::PixelFormat &pixFmt)
-{
-	return libcamera::PixelFormatInfo::info(pixFmt).colourEncoding ==
-	       libcamera::PixelFormatInfo::ColourEncodingRAW;
-}
-
-} /* namespace */
-
 namespace libcamera {
 
 LOG_DEFINE_CATEGORY(MaliC55)
diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
index 52633fe3..a5b613bb 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
@@ -536,8 +536,7 @@ CameraConfiguration::Status RkISP1CameraConfiguration::validate()
 	 */
 	if (config_.size() > 1) {
 		for (const auto &cfg : config_) {
-			if (PixelFormatInfo::info(cfg.pixelFormat).colourEncoding ==
-			    PixelFormatInfo::ColourEncodingRAW) {
+			if (isFormatRaw(cfg.pixelFormat)) {
 				config_.resize(1);
 				status = Adjusted;
 				break;
@@ -551,9 +550,7 @@ CameraConfiguration::Status RkISP1CameraConfiguration::validate()
 		 * Platforms with dewarper support, such as i.MX8MP, support
 		 * only a single stream. We can inspect config_[0] only here.
 		 */
-		bool isRaw = PixelFormatInfo::info(config_[0].pixelFormat).colourEncoding ==
-			     PixelFormatInfo::ColourEncodingRAW;
-		if (!isRaw)
+		if (!isFormatRaw(config_[0].pixelFormat))
 			useDewarper = true;
 	}
 
-- 
2.49.0