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DngCreator: Fix calculation of date/time stamps

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am: 3fc21ef78b

Change-Id: Ic09cbb9fcf26d4d189506cd1b8c3aaacb86f448d
This commit is contained in:
Eino-Ville Talvala
2016-09-19 19:34:47 +00:00
committed by android-build-merger
parent a712eb9b26 3fc21ef78b
commit 215c76b1f4
1 changed files with 21 additions and 4 deletions
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25
core/java/android/hardware/camera2/DngCreator.java
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@@ -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();
// Assume that sensor timestamp has that timebase to start
long timeOffset = 0;
// Find boot time
long bootTimeMillis = currentTime - SystemClock.elapsedRealtime();
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