From 0110d9915e6bbea06707a9b62f313d3ec44a059a Mon Sep 17 00:00:00 2001
From: Naushir Patuck <naush@raspberrypi.com>
Date: Mon, 4 Dec 2023 16:19:01 +0000
Subject: ipa: vc4: Implement the StatsOutputEnable vendor control

Implement the StatsOutputEnable control for the VC4 IPA. When set,
this outputs the ISP statistics as a uint8_t span through the Bcm2835StatsOutput
metadata control.

To get this working, IpaBase::libcameraMetadata_ is moved from a private
to a protected member variable. This makes it accessable to the VC4
derived IPA class.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
 src/ipa/rpi/vc4/vc4.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/ipa/rpi/vc4')

diff --git a/src/ipa/rpi/vc4/vc4.cpp b/src/ipa/rpi/vc4/vc4.cpp
index c165a5b8..d2159a51 100644
--- a/src/ipa/rpi/vc4/vc4.cpp
+++ b/src/ipa/rpi/vc4/vc4.cpp
@@ -11,6 +11,7 @@
 #include <linux/bcm2835-isp.h>
 
 #include <libcamera/base/log.h>
+#include <libcamera/base/span.h>
 #include <libcamera/control_ids.h>
 #include <libcamera/ipa/ipa_module_info.h>
 
@@ -245,6 +246,12 @@ RPiController::StatisticsPtr IpaVc4::platformProcessStats(Span<uint8_t> mem)
 						  stats->focus_stats[i].contrast_val_num[1][1],
 						  stats->focus_stats[i].contrast_val_num[1][0] });
 
+	if (statsMetadataOutput_) {
+		Span<const uint8_t> statsSpan(reinterpret_cast<const uint8_t *>(stats),
+					      sizeof(bcm2835_isp_stats));
+		libcameraMetadata_.set(controls::rpi::Bcm2835StatsOutput, statsSpan);
+	}
+
 	return statistics;
 }
 
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