Camera: Add version 3.8 of ICameraDeviceCallback
The new version of ICameraDeviceCallback supports shutter notify with readout
timestamp.
The readout timestamp is used to re-time viewfinder frames to reduce
jitter. When camera runs at fixed frame rate, the start_of_exposure time
intervals may change, but start_or_readout intervals are constant.
Test: Camera VTS test
Bug: 189380857
Change-Id: I4c3856a4e30caa8cdf8417d437de1de3190c6fd6
diff --git a/camera/device/3.8/ICameraDeviceCallback.hal b/camera/device/3.8/ICameraDeviceCallback.hal
new file mode 100644
index 0000000..de0775d
--- /dev/null
+++ b/camera/device/3.8/ICameraDeviceCallback.hal
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.camera.device@3.8;
+
+import @3.5::ICameraDeviceCallback;
+
+/**
+ * Callback methods for the HAL to call into the framework.
+ */
+interface ICameraDeviceCallback extends @3.5::ICameraDeviceCallback {
+ /**
+ * Identical to @3.5::ICameraDeviceCallback.notify, except that it takes a
+ * list of @3.8::NotifyMsg which contain readout timestamp in addition
+ * to exposure start timestamp for shutter.
+ *
+ * The readout timestamp is used for the framework to re-time the viewfinder
+ * frames targeted for SurfaceView so that preview jitter can be reduced.
+ */
+ notify_3_8(vec<NotifyMsg> msgs);
+};