Camera: add offline session API skeleton

Test: N/A, no implementation yet
Bug: 135142453
Change-Id: I497e42433d4d49466fe37467d4ff66e8583c55df
diff --git a/services/camera/libcameraservice/common/CameraDeviceBase.h b/services/camera/libcameraservice/common/CameraDeviceBase.h
index 935bc37..1026fdf 100644
--- a/services/camera/libcameraservice/common/CameraDeviceBase.h
+++ b/services/camera/libcameraservice/common/CameraDeviceBase.h
@@ -35,6 +35,8 @@
 #include "device3/Camera3StreamInterface.h"
 #include "binder/Status.h"
 
+#include "CameraOfflineSessionBase.h"
+
 namespace android {
 
 class CameraProviderManager;
@@ -389,6 +391,13 @@
      * requests to complete, based on their settings
      */
     virtual nsecs_t getExpectedInFlightDuration() = 0;
+
+    /**
+     * switch to offline session
+     */
+    virtual status_t switchToOffline(
+            const std::vector<int32_t>& streamsToKeep,
+            /*out*/ sp<CameraOfflineSessionBase>* session) = 0;
 };
 
 }; // namespace android
diff --git a/services/camera/libcameraservice/common/CameraOfflineSessionBase.cpp b/services/camera/libcameraservice/common/CameraOfflineSessionBase.cpp
new file mode 100644
index 0000000..ff673a9
--- /dev/null
+++ b/services/camera/libcameraservice/common/CameraOfflineSessionBase.cpp
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include "CameraOfflineSessionBase.h"
+
+namespace android {
+
+/**
+ * Base class destructors
+ */
+CameraOfflineSessionBase::~CameraOfflineSessionBase() {
+}
+
+} // namespace android
diff --git a/services/camera/libcameraservice/common/CameraOfflineSessionBase.h b/services/camera/libcameraservice/common/CameraOfflineSessionBase.h
new file mode 100644
index 0000000..3862521
--- /dev/null
+++ b/services/camera/libcameraservice/common/CameraOfflineSessionBase.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#ifndef ANDROID_SERVERS_CAMERA_CAMERAOFFLINESESSIONBASE_H
+#define ANDROID_SERVERS_CAMERA_CAMERAOFFLINESESSIONBASE_H
+
+#include <utils/RefBase.h>
+#include <utils/String8.h>
+#include <utils/Timers.h>
+
+#include "camera/CaptureResult.h"
+
+namespace android {
+
+class CameraOfflineSessionBase : public virtual RefBase {
+  public:
+    virtual ~CameraOfflineSessionBase();
+
+    // The session's original camera ID
+    virtual const String8& getId() const = 0;
+
+    virtual status_t disconnect() = 0;
+
+    virtual status_t dump(int fd) = 0;
+
+    virtual status_t abort() = 0;
+
+    /**
+     * Capture result passing
+     */
+    virtual status_t waitForNextFrame(nsecs_t timeout) = 0;
+
+    virtual status_t getNextResult(CaptureResult *frame) = 0;
+
+    // TODO: notification passing path
+}; // class CameraOfflineSessionBase
+
+} // namespace android
+
+#endif