[libcamera-devel] [PATCH 1/2] libcamera: Add the fromV4L2PixelFormat method

[Sebastian Fricke]

Add the method to get the corresponding bayer-format from a given
V4L2-pixel-format. Uses the existing mapping table.

Signed-off-by: Sebastian Fricke <sebastian.fricke.linux at gmail.com>
---
 include/libcamera/internal/bayer_format.h |  1 +
 src/libcamera/bayer_format.cpp            | 14 ++++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/include/libcamera/internal/bayer_format.h b/include/libcamera/internal/bayer_format.h
index 4280b76b..a8060029 100644
--- a/include/libcamera/internal/bayer_format.h
+++ b/include/libcamera/internal/bayer_format.h
@@ -48,6 +48,7 @@ public:
 	std::string toString() const;
 
 	V4L2PixelFormat toV4L2PixelFormat() const;
+	BayerFormat fromV4L2PixelFormat(V4L2PixelFormat v4l2Format) const;
 	BayerFormat transform(Transform t) const;
 
 	Order order;
diff --git a/src/libcamera/bayer_format.cpp b/src/libcamera/bayer_format.cpp
index c42792ff..f4f0e8ca 100644
--- a/src/libcamera/bayer_format.cpp
+++ b/src/libcamera/bayer_format.cpp
@@ -217,6 +217,20 @@ V4L2PixelFormat BayerFormat::toV4L2PixelFormat() const
 	return V4L2PixelFormat();
 }
 
+/**
+ * \brief Convert a V4L2PixelFormat into the corresponding BayerFormat
+ * \param[in] v4l2Format The raw format to convert into a BayerFormat
+ * \return The BayerFormat corresponding to the V4L2PixelFormat parameter
+ */
+BayerFormat BayerFormat::fromV4L2PixelFormat(V4L2PixelFormat v4l2Format) const
+{
+	const auto it = v4l2ToBayer.find(v4l2Format);
+	if (it != v4l2ToBayer.end())
+	        return it->second;
+
+	return BayerFormat();
+}
+
 /**
  * \brief Apply a transform to this BayerFormat
  * \param[in] t The transform to apply
-- 
2.29.2