ipa: libipa: Add data accessor to Histogram

For debugging purposes it is helpful to access the internal data of the
histogram.  Add an accessor for that.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/src/ipa/libipa/histogram.cpp b/src/ipa/libipa/histogram.cpp
index 5fbfadf5..10e44b54 100644
--- a/src/ipa/libipa/histogram.cpp
+++ b/src/ipa/libipa/histogram.cpp
@@ -63,6 +63,12 @@ Histogram::Histogram(Span<const uint32_t> data)
  */
 
 /**
+ * \fn Histogram::data()
+ * \brief Retrieve the internal data
+ * \return The data
+ */
+
+/**
  * \fn Histogram::total()
  * \brief Retrieve the total number of values in the data set
  * \return Number of values
diff --git a/src/ipa/libipa/histogram.h b/src/ipa/libipa/histogram.h
index 6fd64168..a926002c 100644
--- a/src/ipa/libipa/histogram.h
+++ b/src/ipa/libipa/histogram.h
@@ -36,6 +36,7 @@ public:
 	}
 
 	size_t bins() const { return cumulative_.size() - 1; }
+	const Span<const uint64_t> data() const { return cumulative_; }
 	uint64_t total() const { return cumulative_[cumulative_.size() - 1]; }
 	uint64_t cumulativeFrequency(double bin) const;
 	double quantile(double q, uint32_t first = 0, uint32_t last = UINT_MAX) const;