DngCreator: Fix calculation of date/time stamps (215c76b1) · Commits · e / os / android_frameworks_base

core/java/android/hardware/camera2/DngCreator.java

+22 −5

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ import android.location.Location;
		import android.media.ExifInterface;
		import android.media.Image;
		import android.os.SystemClock;
		import android.util.Log;
		import android.util.Size;

		import java.io.IOException;
		@@ -89,17 +90,33 @@ public final class DngCreator implements AutoCloseable {
		throw new IllegalArgumentException("Null argument to DngCreator constructor");
		}

		// Find current time
		// Find current time in milliseconds since 1970
		long currentTime = System.currentTimeMillis();

		// Find boot time
		long bootTimeMillis = currentTime - SystemClock.elapsedRealtime();
		// Assume that sensor timestamp has that timebase to start
		long timeOffset = 0;

		int timestampSource = characteristics.get(
		CameraCharacteristics.SENSOR_INFO_TIMESTAMP_SOURCE);

		if (timestampSource == CameraCharacteristics.SENSOR_INFO_TIMESTAMP_SOURCE_REALTIME) {
		// This means the same timebase as SystemClock.elapsedRealtime(),
		// which is CLOCK_BOOTTIME
		timeOffset = currentTime - SystemClock.elapsedRealtime();
		} else if (timestampSource == CameraCharacteristics.SENSOR_INFO_TIMESTAMP_SOURCE_UNKNOWN) {
		// This means the same timebase as System.currentTimeMillis(),
		// which is CLOCK_MONOTONIC
		timeOffset = currentTime - SystemClock.uptimeMillis();
		} else {
		// Unexpected time source - treat as CLOCK_MONOTONIC
		Log.w(TAG, "Sensor timestamp source is unexpected: " + timestampSource);
		timeOffset = currentTime - SystemClock.uptimeMillis();
		}

		// Find capture time (nanos since boot)
		Long timestamp = metadata.get(CaptureResult.SENSOR_TIMESTAMP);
		long captureTime = currentTime;
		if (timestamp != null) {
		captureTime = timestamp / 1000000 + bootTimeMillis;
		captureTime = timestamp / 1000000 + timeOffset;
		}

		// Format for metadata