Fix clang-tidy warnings in camera.

* Add explicit keyword to conversion constructors.
Bug: 28341362
* Use const reference type for read-only parameters.
Bug: 30407689
* Use const reference type to avoid unnecessary copy.
Bug: 30413862
Test: build with WITH_TIDY=1

Change-Id: I71d3008da843ba5f1df1a73a320fb2af6ceffa16
diff --git a/services/camera/libcameraservice/api1/Camera2Client.cpp b/services/camera/libcameraservice/api1/Camera2Client.cpp
index 005dd69..bcd62d6 100644
--- a/services/camera/libcameraservice/api1/Camera2Client.cpp
+++ b/services/camera/libcameraservice/api1/Camera2Client.cpp
@@ -526,7 +526,7 @@
 }
 
 status_t Camera2Client::setPreviewWindowL(const sp<IBinder>& binder,
-        sp<Surface> window) {
+        const sp<Surface>& window) {
     ATRACE_CALL();
     status_t res;
 
@@ -1903,12 +1903,12 @@
 }
 
 status_t Camera2Client::registerFrameListener(int32_t minId, int32_t maxId,
-        wp<camera2::FrameProcessor::FilteredListener> listener, bool sendPartials) {
+        const wp<camera2::FrameProcessor::FilteredListener>& listener, bool sendPartials) {
     return mFrameProcessor->registerListener(minId, maxId, listener, sendPartials);
 }
 
 status_t Camera2Client::removeFrameListener(int32_t minId, int32_t maxId,
-        wp<camera2::FrameProcessor::FilteredListener> listener) {
+        const wp<camera2::FrameProcessor::FilteredListener>& listener) {
     return mFrameProcessor->removeListener(minId, maxId, listener);
 }
 
diff --git a/services/camera/libcameraservice/api1/Camera2Client.h b/services/camera/libcameraservice/api1/Camera2Client.h
index 3cb9e4f..e2129f5 100644
--- a/services/camera/libcameraservice/api1/Camera2Client.h
+++ b/services/camera/libcameraservice/api1/Camera2Client.h
@@ -126,10 +126,10 @@
     int getZslStreamId() const;
 
     status_t registerFrameListener(int32_t minId, int32_t maxId,
-            wp<camera2::FrameProcessor::FilteredListener> listener,
+            const wp<camera2::FrameProcessor::FilteredListener>& listener,
             bool sendPartials = true);
     status_t removeFrameListener(int32_t minId, int32_t maxId,
-            wp<camera2::FrameProcessor::FilteredListener> listener);
+            const wp<camera2::FrameProcessor::FilteredListener>& listener);
 
     status_t stopStream();
 
@@ -160,7 +160,7 @@
     typedef camera2::Parameters Parameters;
 
     status_t setPreviewWindowL(const sp<IBinder>& binder,
-            sp<Surface> window);
+            const sp<Surface>& window);
     status_t startPreviewL(Parameters &params, bool restart);
     void     stopPreviewL();
     status_t startRecordingL(Parameters &params, bool restart);
diff --git a/services/camera/libcameraservice/api1/client2/CallbackProcessor.cpp b/services/camera/libcameraservice/api1/client2/CallbackProcessor.cpp
index b4b269a..3f4017f 100644
--- a/services/camera/libcameraservice/api1/client2/CallbackProcessor.cpp
+++ b/services/camera/libcameraservice/api1/client2/CallbackProcessor.cpp
@@ -55,7 +55,7 @@
 }
 
 status_t CallbackProcessor::setCallbackWindow(
-        sp<Surface> callbackWindow) {
+        const sp<Surface>& callbackWindow) {
     ATRACE_CALL();
     status_t res;
 
diff --git a/services/camera/libcameraservice/api1/client2/CallbackProcessor.h b/services/camera/libcameraservice/api1/client2/CallbackProcessor.h
index a22442f..5231688 100644
--- a/services/camera/libcameraservice/api1/client2/CallbackProcessor.h
+++ b/services/camera/libcameraservice/api1/client2/CallbackProcessor.h
@@ -41,13 +41,13 @@
 class CallbackProcessor:
             public Thread, public CpuConsumer::FrameAvailableListener {
   public:
-    CallbackProcessor(sp<Camera2Client> client);
+    explicit CallbackProcessor(sp<Camera2Client> client);
     ~CallbackProcessor();
 
     void onFrameAvailable(const BufferItem& item);
 
     // Set to NULL to disable the direct-to-app callback window
-    status_t setCallbackWindow(sp<Surface> callbackWindow);
+    status_t setCallbackWindow(const sp<Surface>& callbackWindow);
     status_t updateStream(const Parameters &params);
     status_t deleteStream();
     int getStreamId() const;
diff --git a/services/camera/libcameraservice/api1/client2/Camera2Heap.h b/services/camera/libcameraservice/api1/client2/Camera2Heap.h
index 9c72d76..fe3afcb 100644
--- a/services/camera/libcameraservice/api1/client2/Camera2Heap.h
+++ b/services/camera/libcameraservice/api1/client2/Camera2Heap.h
@@ -26,7 +26,7 @@
 // Utility class for managing a set of IMemory blocks
 class Camera2Heap : public RefBase {
   public:
-    Camera2Heap(size_t buf_size, uint_t num_buffers = 1,
+    explicit Camera2Heap(size_t buf_size, uint_t num_buffers = 1,
             const char *name = NULL) :
             mBufSize(buf_size),
             mNumBufs(num_buffers) {
diff --git a/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp b/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp
index 05adb29..b65f1c7 100644
--- a/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp
+++ b/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp
@@ -59,7 +59,7 @@
     ALOGV("%s: Exit", __FUNCTION__);
 }
 
-void CaptureSequencer::setZslProcessor(wp<ZslProcessor> processor) {
+void CaptureSequencer::setZslProcessor(const wp<ZslProcessor>& processor) {
     Mutex::Autolock l(mInputMutex);
     mZslProcessor = processor;
 }
@@ -132,7 +132,7 @@
 }
 
 void CaptureSequencer::onCaptureAvailable(nsecs_t timestamp,
-        sp<MemoryBase> captureBuffer, bool captureError) {
+        const sp<MemoryBase>& captureBuffer, bool captureError) {
     ATRACE_CALL();
     ALOGV("%s", __FUNCTION__);
     Mutex::Autolock l(mInputMutex);
@@ -709,7 +709,7 @@
 }
 
 /*static*/ void CaptureSequencer::shutterNotifyLocked(const Parameters &params,
-            sp<Camera2Client> client, int msgType) {
+            const sp<Camera2Client>& client, int msgType) {
     ATRACE_CALL();
 
     if (params.state == Parameters::STILL_CAPTURE
diff --git a/services/camera/libcameraservice/api1/client2/CaptureSequencer.h b/services/camera/libcameraservice/api1/client2/CaptureSequencer.h
index a7c61d2..f2e3750 100644
--- a/services/camera/libcameraservice/api1/client2/CaptureSequencer.h
+++ b/services/camera/libcameraservice/api1/client2/CaptureSequencer.h
@@ -44,11 +44,11 @@
             virtual public Thread,
             virtual public FrameProcessor::FilteredListener {
   public:
-    CaptureSequencer(wp<Camera2Client> client);
+    explicit CaptureSequencer(wp<Camera2Client> client);
     ~CaptureSequencer();
 
     // Get reference to the ZslProcessor, which holds the ZSL buffers and frames
-    void setZslProcessor(wp<ZslProcessor> processor);
+    void setZslProcessor(const wp<ZslProcessor>& processor);
 
     // Begin still image capture
     status_t startCapture(int msgType);
@@ -69,7 +69,7 @@
     virtual void onResultAvailable(const CaptureResult &result);
 
     // Notifications from the JPEG processor
-    void onCaptureAvailable(nsecs_t timestamp, sp<MemoryBase> captureBuffer, bool captureError);
+    void onCaptureAvailable(nsecs_t timestamp, const sp<MemoryBase>& captureBuffer, bool captureError);
 
     void dump(int fd, const Vector<String16>& args);
 
@@ -172,7 +172,7 @@
 
     // Emit Shutter/Raw callback to java, and maybe play a shutter sound
     static void shutterNotifyLocked(const Parameters &params,
-            sp<Camera2Client> client, int msgType);
+            const sp<Camera2Client>& client, int msgType);
 };
 
 }; // namespace camera2
diff --git a/services/camera/libcameraservice/api1/client2/FrameProcessor.cpp b/services/camera/libcameraservice/api1/client2/FrameProcessor.cpp
index 4d12015..394eb4c 100644
--- a/services/camera/libcameraservice/api1/client2/FrameProcessor.cpp
+++ b/services/camera/libcameraservice/api1/client2/FrameProcessor.cpp
@@ -389,7 +389,7 @@
 }
 
 
-void FrameProcessor::callbackFaceDetection(sp<Camera2Client> client,
+void FrameProcessor::callbackFaceDetection(const sp<Camera2Client>& client,
                                      const camera_frame_metadata &metadata) {
 
     camera_frame_metadata *metadata_ptr =
diff --git a/services/camera/libcameraservice/api1/client2/FrameProcessor.h b/services/camera/libcameraservice/api1/client2/FrameProcessor.h
index a5b81a7..62a4e91 100644
--- a/services/camera/libcameraservice/api1/client2/FrameProcessor.h
+++ b/services/camera/libcameraservice/api1/client2/FrameProcessor.h
@@ -107,7 +107,7 @@
     int32_t mLast3AFrameNumber;
 
     // Emit FaceDetection event to java if faces changed
-    void callbackFaceDetection(sp<Camera2Client> client,
+    void callbackFaceDetection(const sp<Camera2Client>& client,
                                const camera_frame_metadata &metadata);
 };
 
diff --git a/services/camera/libcameraservice/api1/client2/JpegCompressor.cpp b/services/camera/libcameraservice/api1/client2/JpegCompressor.cpp
index 9ecab71..01951a0 100644
--- a/services/camera/libcameraservice/api1/client2/JpegCompressor.cpp
+++ b/services/camera/libcameraservice/api1/client2/JpegCompressor.cpp
@@ -36,7 +36,7 @@
     Mutex::Autolock lock(mMutex);
 }
 
-status_t JpegCompressor::start(Vector<CpuConsumer::LockedBuffer*> buffers,
+status_t JpegCompressor::start(const Vector<CpuConsumer::LockedBuffer*>& buffers,
         nsecs_t captureTime) {
     ALOGV("%s", __FUNCTION__);
     Mutex::Autolock busyLock(mBusyMutex);
diff --git a/services/camera/libcameraservice/api1/client2/JpegCompressor.h b/services/camera/libcameraservice/api1/client2/JpegCompressor.h
index df5da54..589a2fd 100644
--- a/services/camera/libcameraservice/api1/client2/JpegCompressor.h
+++ b/services/camera/libcameraservice/api1/client2/JpegCompressor.h
@@ -48,7 +48,7 @@
 
     // Start compressing COMPRESSED format buffers; JpegCompressor takes
     // ownership of the Buffers vector.
-    status_t start(Vector<CpuConsumer::LockedBuffer*> buffers,
+    status_t start(const Vector<CpuConsumer::LockedBuffer*>& buffers,
             nsecs_t captureTime);
 
     status_t cancel();
diff --git a/services/camera/libcameraservice/api1/client2/Parameters.h b/services/camera/libcameraservice/api1/client2/Parameters.h
index f4bb34c..798aab5 100644
--- a/services/camera/libcameraservice/api1/client2/Parameters.h
+++ b/services/camera/libcameraservice/api1/client2/Parameters.h
@@ -412,7 +412,7 @@
     template<typename S, typename P>
     class BaseLock {
       public:
-        BaseLock(S &p):
+        explicit BaseLock(S &p):
                 mParameters(p.mParameters),
                 mSharedParameters(p) {
             mSharedParameters.mLock.lock();
diff --git a/services/camera/libcameraservice/api1/client2/StreamingProcessor.cpp b/services/camera/libcameraservice/api1/client2/StreamingProcessor.cpp
index de42fb2..e334410 100644
--- a/services/camera/libcameraservice/api1/client2/StreamingProcessor.cpp
+++ b/services/camera/libcameraservice/api1/client2/StreamingProcessor.cpp
@@ -58,7 +58,7 @@
     deleteRecordingStream();
 }
 
-status_t StreamingProcessor::setPreviewWindow(sp<Surface> window) {
+status_t StreamingProcessor::setPreviewWindow(const sp<Surface>& window) {
     ATRACE_CALL();
     status_t res;
 
diff --git a/services/camera/libcameraservice/api1/client2/StreamingProcessor.h b/services/camera/libcameraservice/api1/client2/StreamingProcessor.h
index 57e6389..ce4a343 100644
--- a/services/camera/libcameraservice/api1/client2/StreamingProcessor.h
+++ b/services/camera/libcameraservice/api1/client2/StreamingProcessor.h
@@ -39,10 +39,10 @@
  */
 class StreamingProcessor : public virtual VirtualLightRefBase {
   public:
-    StreamingProcessor(sp<Camera2Client> client);
+    explicit StreamingProcessor(sp<Camera2Client> client);
     ~StreamingProcessor();
 
-    status_t setPreviewWindow(sp<Surface> window);
+    status_t setPreviewWindow(const sp<Surface>& window);
     status_t setRecordingWindow(sp<Surface> window);
 
     bool haveValidPreviewWindow() const;