android: camera_metadata: Add functions for instrumenting resizing

Add utility functions to CameraMetadata to check if it has been resized,
and for outputting the actual entry and data count. This is meant to be
used to output information on resizing, to assist developers in
choosing proper initial sizes to avoid resizing. Also make CameraDevice
use these functions for static and result metadata.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/android/camera_device.cpp b/src/android/camera_device.cpp
index dc0c8f5f..7fc4ddb0 100644
--- a/src/android/camera_device.cpp
+++ b/src/android/camera_device.cpp
@@ -1438,6 +1438,13 @@ const camera_metadata_t *CameraDevice::getStaticMetadata()
 		return nullptr;
 	}
 
+	if (staticMetadata_->resized()) {
+		auto [entryCount, dataCount] = staticMetadata_->usage();
+		LOG(HAL, Info)
+			<< "Static metadata resized: " << entryCount
+			<< " entries and " << dataCount << " bytes used";
+	}
+
 	return staticMetadata_->get();
 }
 
@@ -2316,5 +2323,12 @@ CameraDevice::getResultMetadata(const Camera3RequestDescriptor &descriptor) cons
 		LOG(HAL, Error) << "Failed to construct result metadata";
 	}
 
+	if (resultMetadata->resized()) {
+		auto [entryCount, dataCount] = resultMetadata->usage();
+		LOG(HAL, Info)
+			<< "Result metadata resized: " << entryCount
+			<< " entries and " << dataCount << " bytes used";
+	}
+
 	return resultMetadata;
 }