usbcamera: initial implementation of default usb camera HAL
* Basic skeleton of usb camera hal implementation
* Vendor tag is not supported yet
* Further usb camera hal implementation can be filled into UsbCamera.cpp
* Hot plug thread need to be implemented
Change-Id: Ida63b6d640e32192f5b60a280d9d5106d80e523f
diff --git a/modules/usbcamera/HotplugThread.cpp b/modules/usbcamera/HotplugThread.cpp
new file mode 100644
index 0000000..6c65086
--- /dev/null
+++ b/modules/usbcamera/HotplugThread.cpp
@@ -0,0 +1,59 @@
+/*
+ * 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "HotplugThread"
+#include <cutils/log.h>
+
+#include "HotplugThread.h"
+
+namespace usb_camera_hal {
+
+HotplugThread::HotplugThread(CameraHAL *hal)
+ : mModule(hal) {
+
+}
+
+HotplugThread::~HotplugThread() {
+
+}
+
+void HotplugThread::requestExit() {
+ // Call parent to set up shutdown
+ Thread::requestExit();
+
+ // Cleanup other states?
+}
+
+bool HotplugThread::threadLoop() {
+
+ /**
+ * Check camera connection status change, if connected, do below:
+ * 1. Create camera device, add to mCameras.
+ * 2. Init static info (mCameras[id]->initStaticInfo())
+ * 3. Notify on_status_change callback
+ *
+ * If unconnected, similarly, do below:
+ * 1. Destroy camera device and remove it from mCameras.
+ * 2. Notify on_status_change callback
+ *
+ * DO NOT have a tight polling loop here, to avoid excessive CPU utilization.
+ */
+
+ return true;
+}
+
+} // namespace usb_camera_hal