Camera: Add support for readout timestamp

The readout timestamp is added to CaptureResultExtras used by
onCaptureStarted(). If the HAL supports readoutTimestamp, the
readout timestamp is passed in onCaptureStarted().

Test: atest Experimental2022SystemTest
Bug: 229097448
Bug: 229773853
Change-Id: I1ac822b14a2a4198e7c8ef17a39212f504c2d719
diff --git a/services/camera/libcameraservice/common/CameraProviderManager.cpp b/services/camera/libcameraservice/common/CameraProviderManager.cpp
index d545484..2751915 100644
--- a/services/camera/libcameraservice/common/CameraProviderManager.cpp
+++ b/services/camera/libcameraservice/common/CameraProviderManager.cpp
@@ -1377,6 +1377,28 @@
     return res;
 }
 
+status_t CameraProviderManager::ProviderInfo::DeviceInfo3::addReadoutTimestampTag() {
+    status_t res = OK;
+    auto& c = mCameraCharacteristics;
+
+    auto entry = c.find(ANDROID_SENSOR_READOUT_TIMESTAMP);
+    if (entry.count != 0) {
+        ALOGE("%s: CameraCharacteristics must not contain ANDROID_SENSOR_READOUT_TIMESTAMP!",
+                __FUNCTION__);
+    }
+
+    uint8_t readoutTimestamp = ANDROID_SENSOR_READOUT_TIMESTAMP_NOT_SUPPORTED;
+    int deviceVersion = HARDWARE_DEVICE_API_VERSION(
+            mVersion.get_major(), mVersion.get_minor());
+    if (deviceVersion >= CAMERA_DEVICE_API_VERSION_3_8) {
+        readoutTimestamp = ANDROID_SENSOR_READOUT_TIMESTAMP_HARDWARE;
+    }
+
+    res = c.update(ANDROID_SENSOR_READOUT_TIMESTAMP, &readoutTimestamp, 1);
+
+    return res;
+}
+
 status_t CameraProviderManager::ProviderInfo::DeviceInfo3::removeAvailableKeys(
         CameraMetadata& c, const std::vector<uint32_t>& keys, uint32_t keyTag) {
     status_t res = OK;