libcamera: matrix: Add read-only accessor to internal dataHEADmaster

Add a data() function to the Matrix class to access the internal data.
This is useful for code that needs to use the matrix contents as a
linear array, as shown by the RkISP1::Ccm::process() function that needs
to copy the matrix data to a local variable. Simplify that function by
using the new accessor.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>

1 files changed, 1 insertions, 6 deletions

diff --git a/src/ipa/rkisp1/algorithms/ccm.cpp b/src/ipa/rkisp1/algorithms/ccm.cpp
index e2b5cf4d..eb8ca39e 100644
--- a/src/ipa/rkisp1/algorithms/ccm.cpp
+++ b/src/ipa/rkisp1/algorithms/ccm.cpp
@@ -120,12 +120,7 @@ void Ccm::process([[maybe_unused]] IPAContext &context,
 		  [[maybe_unused]] const rkisp1_stat_buffer *stats,
 		  ControlList &metadata)
 {
-	float m[9];
-	for (unsigned int i = 0; i < 3; i++) {
-		for (unsigned int j = 0; j < 3; j++)
-			m[i * 3 + j] = frameContext.ccm.ccm[i][j];
-	}
-	metadata.set(controls::ColourCorrectionMatrix, m);
+	metadata.set(controls::ColourCorrectionMatrix, frameContext.ccm.ccm.data());
 }
 
 REGISTER_IPA_ALGORITHM(Ccm, "Ccm")