CameraService: intercept Camera module
Wrap camera module returned from HAL so get_camera_info returns
static_camera_characteristics processed by framework, which
generates keys added after HAL3.2 is released.
Change-Id: Ief423a1571cf06c7ef80b98b403a33969baf95f6
diff --git a/services/camera/libcameraservice/common/CameraModule.h b/services/camera/libcameraservice/common/CameraModule.h
new file mode 100644
index 0000000..31b9ae2
--- /dev/null
+++ b/services/camera/libcameraservice/common/CameraModule.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2015 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_CAMERAMODULE_H
+#define ANDROID_SERVERS_CAMERA_CAMERAMODULE_H
+
+#include <hardware/camera.h>
+#include <camera/CameraMetadata.h>
+#include <utils/Mutex.h>
+
+/* This needs to be increased if we can have more cameras */
+#define MAX_CAMERAS_PER_MODULE 2
+
+
+namespace android {
+/**
+ * A wrapper class for HAL camera module.
+ *
+ * This class wraps camera_module_t returned from HAL to provide a wrapped
+ * get_camera_info implementation which CameraService generates some
+ * camera characteristics keys defined in newer HAL version on an older HAL.
+ */
+class CameraModule {
+public:
+ CameraModule(camera_module_t *module);
+
+ const hw_module_t* getRawModule();
+ int getCameraInfo(int cameraId, struct camera_info *info);
+ int getNumberOfCameras(void);
+ int open(const char* id, struct hw_device_t** device);
+ int openLegacy(const char* id, uint32_t halVersion, struct hw_device_t** device);
+ int setCallbacks(const camera_module_callbacks_t *callbacks);
+ bool isVendorTagDefined();
+ void getVendorTagOps(vendor_tag_ops_t* ops);
+ int setTorchMode(const char* camera_id, bool enable);
+
+private:
+ // Derive camera characteristics keys defined after HAL device version
+ static void deriveCameraCharacteristicsKeys(uint32_t deviceVersion, CameraMetadata &chars);
+ camera_module_t *mModule;
+ CameraMetadata mCameraCharacteristics[MAX_CAMERAS_PER_MODULE];
+ camera_info mCameraInfo[MAX_CAMERAS_PER_MODULE];
+ bool mCameraInfoCached[MAX_CAMERAS_PER_MODULE];
+ Mutex mCameraInfoLock;
+};
+
+} // namespace android
+
+#endif
+