Abstract away access to audio devices HAL
In this CL all direct access to audio_hw_device_t and its functions is
encapsulated within the new class DeviceHalLocal. Loading of hardware
modules is encapsulated withing DevicesFactoryHalLocal. AudioFlinger
uses interface classes DevicesFactoryHalInterface and DeviceHalInterface
to access these functions.
Bug: 30222631
Change-Id: Ic88b20c55813a24b898f4a832e082c17d81935b7
diff --git a/services/audioflinger/DevicesFactoryHalLocal.h b/services/audioflinger/DevicesFactoryHalLocal.h
new file mode 100644
index 0000000..55d422c
--- /dev/null
+++ b/services/audioflinger/DevicesFactoryHalLocal.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2016 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_HARDWARE_DEVICES_FACTORY_HAL_LOCAL_H
+#define ANDROID_HARDWARE_DEVICES_FACTORY_HAL_LOCAL_H
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+
+#include "DeviceHalLocal.h"
+#include "DevicesFactoryHalInterface.h"
+
+namespace android {
+
+class DevicesFactoryHalLocal : public DevicesFactoryHalInterface
+{
+ public:
+ virtual ~DevicesFactoryHalLocal() {}
+
+ // Opens a device with the specified name. To close the device, it is
+ // necessary to release references to the returned object.
+ virtual status_t openDevice(const char *name, sp<DeviceHalInterface> *device);
+
+ private:
+ friend class DevicesFactoryHalInterface;
+
+ // Can not be constructed directly by clients.
+ DevicesFactoryHalLocal() {}
+};
+
+} // namespace android
+
+#endif // ANDROID_HARDWARE_DEVICES_FACTORY_HAL_LOCAL_H