camera2: Fix native binder interface and add tests.

- Add CameraBinderTests for limited coverage of native
  camera2 binder interfaces for the camera service.
- Fix several bugs in the native binder interfaces.

Bug: 18468810
Change-Id: Iab2d81a5cacd20daf7454aeeed033cc13d88452c

7 files changed, 511 insertions, 15 deletions

diff --git a/camera/ICameraService.cpp b/camera/ICameraService.cpp
index 7bb24ee..7c9720f 100644
--- a/camera/ICameraService.cpp
+++ b/camera/ICameraService.cpp
@@ -285,6 +285,7 @@ public:
         }
 
         Parcel data, reply;
+        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
 
         data.writeInt32(cameraId);
         remote()->transact(BnCameraService::GET_LEGACY_PARAMETERS, data, &reply);
@@ -304,6 +305,7 @@ public:
     virtual status_t supportsCameraApi(int cameraId, int apiVersion) {
         Parcel data, reply;
 
+        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
         data.writeInt32(cameraId);
         data.writeInt32(apiVersion);
         remote()->transact(BnCameraService::SUPPORTS_CAMERA_API, data, &reply);
@@ -315,6 +317,7 @@ public:
 
     virtual void notifySystemEvent(int32_t eventId, const int32_t* args, size_t len) {
         Parcel data, reply;
+        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
         data.writeInt32(eventId);
         data.writeInt32Array(len, args);
         remote()->transact(BnCameraService::NOTIFY_SYSTEM_EVENT, data, &reply,
diff --git a/camera/ICameraServiceListener.cpp b/camera/ICameraServiceListener.cpp
index 90a8bc2..0010325 100644
--- a/camera/ICameraServiceListener.cpp
+++ b/camera/ICameraServiceListener.cpp
@@ -45,8 +45,7 @@ public:
     virtual void onStatusChanged(Status status, int32_t cameraId)
     {
         Parcel data, reply;
-        data.writeInterfaceToken(
-                              ICameraServiceListener::getInterfaceDescriptor());
+        data.writeInterfaceToken(ICameraServiceListener::getInterfaceDescriptor());
 
         data.writeInt32(static_cast<int32_t>(status));
         data.writeInt32(cameraId);
@@ -60,8 +59,7 @@ public:
     virtual void onTorchStatusChanged(TorchStatus status, const String16 &cameraId)
     {
         Parcel data, reply;
-        data.writeInterfaceToken(
-                              ICameraServiceListener::getInterfaceDescriptor());
+        data.writeInterfaceToken(ICameraServiceListener::getInterfaceDescriptor());
 
         data.writeInt32(static_cast<int32_t>(status));
         data.writeString16(cameraId);
@@ -73,14 +71,12 @@ public:
     }
 };
 
-IMPLEMENT_META_INTERFACE(CameraServiceListener,
-                         "android.hardware.ICameraServiceListener");
+IMPLEMENT_META_INTERFACE(CameraServiceListener, "android.hardware.ICameraServiceListener");
 
 // ----------------------------------------------------------------------
 
-status_t BnCameraServiceListener::onTransact(
-    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
-{
+status_t BnCameraServiceListener::onTransact(uint32_t code, const Parcel& data, Parcel* reply,
+        uint32_t flags) {
     switch(code) {
         case STATUS_CHANGED: {
             CHECK_INTERFACE(ICameraServiceListener, data, reply);
diff --git a/camera/camera2/ICameraDeviceUser.cpp b/camera/camera2/ICameraDeviceUser.cpp
index a7549f2..ffe974b 100644
--- a/camera/camera2/ICameraDeviceUser.cpp
+++ b/camera/camera2/ICameraDeviceUser.cpp
@@ -82,7 +82,7 @@ public:
         reply.readExceptionCode();
     }
 
-    virtual status_t submitRequest(sp<CaptureRequest> request, bool repeating,
+    virtual int submitRequest(sp<CaptureRequest> request, bool repeating,
                               int64_t *lastFrameNumber)
     {
         Parcel data, reply;
@@ -111,13 +111,13 @@ public:
             }
         }
 
-	if ((res < NO_ERROR) || (resFrameNumber != NO_ERROR)) {
+        if (res < 0 || (resFrameNumber != NO_ERROR)) {
             res = FAILED_TRANSACTION;
         }
         return res;
     }
 
-    virtual status_t submitRequestList(List<sp<CaptureRequest> > requestList, bool repeating,
+    virtual int submitRequestList(List<sp<CaptureRequest> > requestList, bool repeating,
                                   int64_t *lastFrameNumber)
     {
         Parcel data, reply;
@@ -151,7 +151,7 @@ public:
                 resFrameNumber = reply.readInt64(lastFrameNumber);
             }
         }
-        if ((res < NO_ERROR) || (resFrameNumber != NO_ERROR)) {
+        if (res < 0 || (resFrameNumber != NO_ERROR)) {
             res = FAILED_TRANSACTION;
         }
         return res;
diff --git a/camera/camera2/OutputConfiguration.cpp b/camera/camera2/OutputConfiguration.cpp
index 24acaa0..20a23e0 100644
--- a/camera/camera2/OutputConfiguration.cpp
+++ b/camera/camera2/OutputConfiguration.cpp
@@ -65,6 +65,11 @@ OutputConfiguration::OutputConfiguration(const Parcel& parcel) {
           gbp.get(), String8(name).string());
 }
 
+OutputConfiguration::OutputConfiguration(sp<IGraphicBufferProducer>& gbp, int rotation) {
+    mGbp = gbp;
+    mRotation = rotation;
+}
+
 status_t OutputConfiguration::writeToParcel(Parcel& parcel) const {
 
     parcel.writeInt32(mRotation);
diff --git a/camera/tests/Android.mk b/camera/tests/Android.mk
index 5d37f9e..3777d94 100644
--- a/camera/tests/Android.mk
+++ b/camera/tests/Android.mk
@@ -17,7 +17,8 @@ include $(CLEAR_VARS)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
 
 LOCAL_SRC_FILES:= \
-	VendorTagDescriptorTests.cpp
+	VendorTagDescriptorTests.cpp \
+	CameraBinderTests.cpp
 
 LOCAL_SHARED_LIBRARIES := \
 	libutils \
diff --git a/camera/tests/CameraBinderTests.cpp b/camera/tests/CameraBinderTests.cpp
new file mode 100644
index 0000000..572fb72
--- /dev/null
+++ b/camera/tests/CameraBinderTests.cpp
@@ -0,0 +1,484 @@
+/*
+ * 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 "CameraBinderTests"
+
+#include <binder/IInterface.h>
+#include <binder/IServiceManager.h>
+#include <binder/Parcel.h>
+#include <binder/ProcessState.h>
+#include <utils/Errors.h>
+#include <utils/Log.h>
+#include <utils/List.h>
+#include <utils/String8.h>
+#include <utils/String16.h>
+#include <utils/Condition.h>
+#include <utils/Mutex.h>
+#include <system/graphics.h>
+#include <hardware/gralloc.h>
+
+#include <camera/CameraMetadata.h>
+#include <camera/ICameraService.h>
+#include <camera/ICameraServiceListener.h>
+#include <camera/camera2/CaptureRequest.h>
+#include <camera/camera2/ICameraDeviceUser.h>
+#include <camera/camera2/ICameraDeviceCallbacks.h>
+#include <camera/camera2/OutputConfiguration.h>
+
+#include <gui/BufferItemConsumer.h>
+#include <gui/IGraphicBufferProducer.h>
+#include <gui/Surface.h>
+
+#include <gtest/gtest.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <utility>
+#include <vector>
+#include <map>
+#include <algorithm>
+
+using namespace android;
+
+#define ASSERT_NOT_NULL(x) \
+    ASSERT_TRUE((x) != nullptr)
+
+#define SETUP_TIMEOUT 2000000000 // ns
+#define IDLE_TIMEOUT 2000000000 // ns
+
+// Stub listener implementation
+class TestCameraServiceListener : public BnCameraServiceListener {
+    std::map<String16, TorchStatus> mCameraTorchStatuses;
+    std::map<int32_t, Status> mCameraStatuses;
+    mutable Mutex mLock;
+    mutable Condition mCondition;
+    mutable Condition mTorchCondition;
+public:
+    virtual ~TestCameraServiceListener() {};
+
+    virtual void onStatusChanged(Status status, int32_t cameraId) {
+        Mutex::Autolock l(mLock);
+        mCameraStatuses[cameraId] = status;
+        mCondition.broadcast();
+    };
+
+    virtual void onTorchStatusChanged(TorchStatus status, const String16& cameraId) {
+        Mutex::Autolock l(mLock);
+        mCameraTorchStatuses[cameraId] = status;
+        mTorchCondition.broadcast();
+    };
+
+    bool waitForNumCameras(size_t num) const {
+        Mutex::Autolock l(mLock);
+
+        if (mCameraStatuses.size() == num) {
+            return true;
+        }
+
+        while (mCameraStatuses.size() < num) {
+            if (mCondition.waitRelative(mLock, SETUP_TIMEOUT) != OK) {
+                return false;
+            }
+        }
+        return true;
+    };
+
+    bool waitForTorchState(TorchStatus status, int32_t cameraId) const {
+        Mutex::Autolock l(mLock);
+
+        const auto& iter = mCameraTorchStatuses.find(String16(String8::format("%d", cameraId)));
+        if (iter != mCameraTorchStatuses.end() && iter->second == status) {
+            return true;
+        }
+
+        bool foundStatus = false;
+        while (!foundStatus) {
+            if (mTorchCondition.waitRelative(mLock, SETUP_TIMEOUT) != OK) {
+                return false;
+            }
+            const auto& iter =
+                    mCameraTorchStatuses.find(String16(String8::format("%d", cameraId)));
+            foundStatus = (iter != mCameraTorchStatuses.end() && iter->second == status);
+        }
+        return true;
+    };
+
+    TorchStatus getTorchStatus(int32_t cameraId) const {
+        Mutex::Autolock l(mLock);
+        const auto& iter = mCameraTorchStatuses.find(String16(String8::format("%d", cameraId)));
+        if (iter == mCameraTorchStatuses.end()) {
+            return ICameraServiceListener::TORCH_STATUS_UNKNOWN;
+        }
+        return iter->second;
+    };
+
+    Status getStatus(int32_t cameraId) const {
+        Mutex::Autolock l(mLock);
+        const auto& iter = mCameraStatuses.find(cameraId);
+        if (iter == mCameraStatuses.end()) {
+            return ICameraServiceListener::STATUS_UNKNOWN;
+        }
+        return iter->second;
+    };
+};
+
+// Callback implementation
+class TestCameraDeviceCallbacks : public BnCameraDeviceCallbacks {
+public:
+    enum Status {
+        IDLE,
+        ERROR,
+        PREPARED,
+        RUNNING,
+        SENT_RESULT,
+        UNINITIALIZED
+    };
+
+protected:
+    bool mError;
+    Status mLastStatus;
+    mutable std::vector<Status> mStatusesHit;
+    mutable Mutex mLock;
+    mutable Condition mStatusCondition;
+public:
+    TestCameraDeviceCallbacks() : mError(false), mLastStatus(UNINITIALIZED) {}
+
+    virtual ~TestCameraDeviceCallbacks() {}
+
+    virtual void onDeviceError(CameraErrorCode errorCode,
+            const CaptureResultExtras& resultExtras) {
+        ALOGE("%s: onDeviceError occurred with: %d", __FUNCTION__, static_cast<int>(errorCode));
+        Mutex::Autolock l(mLock);
+        mError = true;
+        mLastStatus = ERROR;
+        mStatusesHit.push_back(mLastStatus);
+        mStatusCondition.broadcast();
+    }
+
+    virtual void onDeviceIdle() {
+        Mutex::Autolock l(mLock);
+        mLastStatus = IDLE;
+        mStatusesHit.push_back(mLastStatus);
+        mStatusCondition.broadcast();
+    }
+
+    virtual void onCaptureStarted(const CaptureResultExtras& resultExtras,
+            int64_t timestamp) {
+        Mutex::Autolock l(mLock);
+        mLastStatus = RUNNING;
+        mStatusesHit.push_back(mLastStatus);
+        mStatusCondition.broadcast();
+    }
+
+
+    virtual void onResultReceived(const CameraMetadata& metadata,
+            const CaptureResultExtras& resultExtras) {
+        Mutex::Autolock l(mLock);
+        mLastStatus = SENT_RESULT;
+        mStatusesHit.push_back(mLastStatus);
+        mStatusCondition.broadcast();
+    }
+
+    virtual void onPrepared(int streamId) {
+        Mutex::Autolock l(mLock);
+        mLastStatus = PREPARED;
+        mStatusesHit.push_back(mLastStatus);
+        mStatusCondition.broadcast();
+    }
+
+    // Test helper functions:
+
+    bool hadError() const {
+        Mutex::Autolock l(mLock);
+        return mError;
+    }
+
+    bool waitForStatus(Status status) const {
+        Mutex::Autolock l(mLock);
+        if (mLastStatus == status) {
+            return true;
+        }
+
+        while (std::find(mStatusesHit.begin(), mStatusesHit.end(), status)
+                == mStatusesHit.end()) {
+
+            if (mStatusCondition.waitRelative(mLock, IDLE_TIMEOUT) != OK) {
+                mStatusesHit.clear();
+                return false;
+            }
+        }
+        mStatusesHit.clear();
+
+        return true;
+
+    }
+
+    void clearStatus() const {
+        Mutex::Autolock l(mLock);
+        mStatusesHit.clear();
+    }
+
+    bool waitForIdle() const {
+        return waitForStatus(IDLE);
+    }
+
+};
+
+// Exercise basic binder calls for the camera service
+TEST(CameraServiceBinderTest, CheckBinderCameraService) {
+    ProcessState::self()->startThreadPool();
+    sp<IServiceManager> sm = defaultServiceManager();
+    sp<IBinder> binder = sm->getService(String16("media.camera"));
+    ASSERT_NOT_NULL(binder);
+    sp<ICameraService> service = interface_cast<ICameraService>(binder);
+
+
+    int32_t numCameras = service->getNumberOfCameras();
+    EXPECT_LE(0, numCameras);
+
+    // Check listener binder calls
+    sp<TestCameraServiceListener> listener(new TestCameraServiceListener());
+    EXPECT_EQ(OK, service->addListener(listener));
+
+    EXPECT_TRUE(listener->waitForNumCameras(numCameras));
+
+    for (int32_t i = 0; i < numCameras; i++) {
+        // We only care about binder calls for the Camera2 API.  Camera1 is deprecated.
+        status_t camera2Support = service->supportsCameraApi(i, ICameraService::API_VERSION_2);
+        if (camera2Support != OK) {
+            EXPECT_EQ(-EOPNOTSUPP, camera2Support);
+            continue;
+        }
+
+        // Check metadata binder call
+        CameraMetadata metadata;
+        EXPECT_EQ(OK, service->getCameraCharacteristics(i, &metadata));
+        EXPECT_FALSE(metadata.isEmpty());
+
+        // Make sure we're available, or skip device tests otherwise
+        ICameraServiceListener::Status s = listener->getStatus(i);
+        EXPECT_EQ(ICameraServiceListener::STATUS_AVAILABLE, s);
+        if (s != ICameraServiceListener::STATUS_AVAILABLE) {
+            continue;
+        }
+
+        // Check connect binder calls
+        sp<TestCameraDeviceCallbacks> callbacks(new TestCameraDeviceCallbacks());
+        sp<ICameraDeviceUser> device;
+        EXPECT_EQ(OK, service->connectDevice(callbacks, i, String16("meeeeeeeee!"),
+                ICameraService::USE_CALLING_UID, /*out*/device));
+        ASSERT_NE(nullptr, device.get());
+        device->disconnect();
+        EXPECT_FALSE(callbacks->hadError());
+
+        ICameraServiceListener::TorchStatus torchStatus = listener->getTorchStatus(i);
+        if (torchStatus == ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF) {
+            // Check torch calls
+            EXPECT_EQ(OK, service->setTorchMode(String16(String8::format("%d", i)),
+                    /*enabled*/true, callbacks));
+            EXPECT_TRUE(listener->waitForTorchState(
+                    ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON, i));
+            EXPECT_EQ(OK, service->setTorchMode(String16(String8::format("%d", i)),
+                    /*enabled*/false, callbacks));
+            EXPECT_TRUE(listener->waitForTorchState(
+                    ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF, i));
+        }
+    }
+
+    EXPECT_EQ(OK, service->removeListener(listener));
+}
+
+// Test fixture for client focused binder tests
+class CameraClientBinderTest : public testing::Test {
+protected:
+    sp<ICameraService> service;
+    int32_t numCameras;
+    std::vector<std::pair<sp<TestCameraDeviceCallbacks>, sp<ICameraDeviceUser>>> openDeviceList;
+    sp<TestCameraServiceListener> serviceListener;
+
+    std::pair<sp<TestCameraDeviceCallbacks>, sp<ICameraDeviceUser>> openNewDevice(int deviceId) {
+
+        sp<TestCameraDeviceCallbacks> callbacks(new TestCameraDeviceCallbacks());
+        sp<ICameraDeviceUser> device;
+        {
+            SCOPED_TRACE("openNewDevice");
+            EXPECT_EQ(OK, service->connectDevice(callbacks, deviceId, String16("meeeeeeeee!"),
+                    ICameraService::USE_CALLING_UID, /*out*/device));
+        }
+        auto p = std::make_pair(callbacks, device);
+        openDeviceList.push_back(p);
+        return p;
+    }
+
+    void closeDevice(std::pair<sp<TestCameraDeviceCallbacks>, sp<ICameraDeviceUser>>& p) {
+        if (p.second.get() != nullptr) {
+            p.second->disconnect();
+            {
+                SCOPED_TRACE("closeDevice");
+                EXPECT_FALSE(p.first->hadError());
+            }
+        }
+        auto iter = std::find(openDeviceList.begin(), openDeviceList.end(), p);
+        if (iter != openDeviceList.end()) {
+            openDeviceList.erase(iter);
+        }
+    }
+
+    virtual void SetUp() {
+        ProcessState::self()->startThreadPool();
+        sp<IServiceManager> sm = defaultServiceManager();
+        sp<IBinder> binder = sm->getService(String16("media.camera"));
+        service = interface_cast<ICameraService>(binder);
+        serviceListener = new TestCameraServiceListener();
+        service->addListener(serviceListener);
+        numCameras = service->getNumberOfCameras();
+    }
+
+    virtual void TearDown() {
+        service = nullptr;
+        numCameras = 0;
+        for (auto& p : openDeviceList) {
+            closeDevice(p);
+        }
+    }
+
+};
+
+TEST_F(CameraClientBinderTest, CheckBinderCameraDeviceUser) {
+    ASSERT_NOT_NULL(service);
+
+    EXPECT_TRUE(serviceListener->waitForNumCameras(numCameras));
+    for (int32_t i = 0; i < numCameras; i++) {
+        // Make sure we're available, or skip device tests otherwise
+        ICameraServiceListener::Status s = serviceListener->getStatus(i);
+        EXPECT_EQ(ICameraServiceListener::STATUS_AVAILABLE, s);
+        if (s != ICameraServiceListener::STATUS_AVAILABLE) {
+            continue;
+        }
+
+        auto p = openNewDevice(i);
+        sp<TestCameraDeviceCallbacks> callbacks = p.first;
+        sp<ICameraDeviceUser> device = p.second;
+
+        // Setup a buffer queue; I'm just using the vendor opaque format here as that is
+        // guaranteed to be present
+        sp<IGraphicBufferProducer> gbProducer;
+        sp<IGraphicBufferConsumer> gbConsumer;
+        BufferQueue::createBufferQueue(&gbProducer, &gbConsumer);
+        sp<BufferItemConsumer> opaqueConsumer = new BufferItemConsumer(gbConsumer,
+                GRALLOC_USAGE_SW_READ_NEVER, /*maxImages*/2, /*controlledByApp*/true);
+        EXPECT_TRUE(opaqueConsumer.get() != nullptr);
+        opaqueConsumer->setName(String8("nom nom nom"));
+
+        // Set to VGA dimens for default, as that is guaranteed to be present
+        EXPECT_EQ(OK, gbConsumer->setDefaultBufferSize(640, 480));
+        EXPECT_EQ(OK, gbConsumer->setDefaultBufferFormat(HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED));
+
+        sp<Surface> surface(new Surface(gbProducer, /*controlledByApp*/false));
+
+        OutputConfiguration output(gbProducer, /*rotation*/0);
+
+        // Can we configure?
+        EXPECT_EQ(OK, device->beginConfigure());
+        status_t streamId = device->createStream(output);
+        EXPECT_LE(0, streamId);
+        EXPECT_EQ(OK, device->endConfigure());
+        EXPECT_FALSE(callbacks->hadError());
+
+        // Can we make requests?
+        CameraMetadata requestTemplate;
+        EXPECT_EQ(OK, device->createDefaultRequest(/*preview template*/1,
+                /*out*/&requestTemplate));
+        sp<CaptureRequest> request(new CaptureRequest());
+        request->mMetadata = requestTemplate;
+        request->mSurfaceList.add(surface);
+        request->mIsReprocess = false;
+        int64_t lastFrameNumber = 0;
+        int64_t lastFrameNumberPrev = 0;
+        callbacks->clearStatus();
+        int requestId = device->submitRequest(request, /*streaming*/true, /*out*/&lastFrameNumber);
+        EXPECT_TRUE(callbacks->waitForStatus(TestCameraDeviceCallbacks::SENT_RESULT));
+        EXPECT_LE(0, requestId);
+
+        // Can we stop requests?
+        EXPECT_EQ(OK, device->cancelRequest(requestId, /*out*/&lastFrameNumber));
+        EXPECT_TRUE(callbacks->waitForIdle());
+        EXPECT_FALSE(callbacks->hadError());
+
+        // Can we do it again?
+        lastFrameNumberPrev = lastFrameNumber;
+        lastFrameNumber = 0;
+        requestTemplate.clear();
+        EXPECT_EQ(OK, device->createDefaultRequest(/*preview template*/1,
+                /*out*/&requestTemplate));
+        sp<CaptureRequest> request2(new CaptureRequest());
+        request2->mMetadata = requestTemplate;
+        request2->mSurfaceList.add(surface);
+        request2->mIsReprocess = false;
+        callbacks->clearStatus();
+        int requestId2 = device->submitRequest(request2, /*streaming*/true,
+                /*out*/&lastFrameNumber);
+        EXPECT_EQ(-1, lastFrameNumber);
+        lastFrameNumber = 0;
+        EXPECT_TRUE(callbacks->waitForStatus(TestCameraDeviceCallbacks::SENT_RESULT));
+        EXPECT_LE(0, requestId2);
+        EXPECT_EQ(OK, device->cancelRequest(requestId2, /*out*/&lastFrameNumber));
+        EXPECT_TRUE(callbacks->waitForIdle());
+        EXPECT_LE(lastFrameNumberPrev, lastFrameNumber);
+        sleep(/*second*/1); // allow some time for errors to show up, if any
+        EXPECT_FALSE(callbacks->hadError());
+
+        // Can we do it with a request list?
+        lastFrameNumberPrev = lastFrameNumber;
+        lastFrameNumber = 0;
+        requestTemplate.clear();
+        CameraMetadata requestTemplate2;
+        EXPECT_EQ(OK, device->createDefaultRequest(/*preview template*/1,
+                /*out*/&requestTemplate));
+        EXPECT_EQ(OK, device->createDefaultRequest(/*preview template*/1,
+                /*out*/&requestTemplate2));
+        sp<CaptureRequest> request3(new CaptureRequest());
+        sp<CaptureRequest> request4(new CaptureRequest());
+        request3->mMetadata = requestTemplate;
+        request3->mSurfaceList.add(surface);
+        request3->mIsReprocess = false;
+        request4->mMetadata = requestTemplate2;
+        request4->mSurfaceList.add(surface);
+        request4->mIsReprocess = false;
+        List<sp<CaptureRequest>> requestList;
+        requestList.push_back(request3);
+        requestList.push_back(request4);
+
+        callbacks->clearStatus();
+        int requestId3 = device->submitRequestList(requestList, /*streaming*/false,
+                /*out*/&lastFrameNumber);
+        EXPECT_TRUE(callbacks->waitForStatus(TestCameraDeviceCallbacks::SENT_RESULT));
+        EXPECT_TRUE(callbacks->waitForIdle());
+        EXPECT_LE(lastFrameNumberPrev, lastFrameNumber);
+        sleep(/*second*/1); // allow some time for errors to show up, if any
+        EXPECT_FALSE(callbacks->hadError());
+
+        // Can we unconfigure?
+        EXPECT_EQ(OK, device->beginConfigure());
+        EXPECT_EQ(OK, device->deleteStream(streamId));
+        EXPECT_EQ(OK, device->endConfigure());
+        sleep(/*second*/1); // allow some time for errors to show up, if any
+        EXPECT_FALSE(callbacks->hadError());
+
+        closeDevice(p);
+    }
+
+};
diff --git a/camera/tests/VendorTagDescriptorTests.cpp b/camera/tests/VendorTagDescriptorTests.cpp
index 6624e79..9082dbf 100644
--- a/camera/tests/VendorTagDescriptorTests.cpp
+++ b/camera/tests/VendorTagDescriptorTests.cpp
@@ -53,6 +53,10 @@ static bool ContainsTag(uint32_t* tagArray, size_t size, uint32_t tag) {
 
 extern "C" {
 
+static int zero_get_tag_count(const vendor_tag_ops_t* vOps) {
+    return 0;
+}
+
 static int default_get_tag_count(const vendor_tag_ops_t* vOps) {
     return VENDOR_TAG_COUNT_ERR;
 }
@@ -173,10 +177,13 @@ TEST(VendorTagDescriptorTest, ErrorConditions) {
     vendor_tag_ops_t vOps;
     FillWithDefaults(&vOps);
 
+    // Make empty tag count
+    vOps.get_tag_count = zero_get_tag_count;
+
     // Ensure create fails when using null vOps
     EXPECT_EQ(BAD_VALUE, VendorTagDescriptor::createDescriptorFromOps(/*vOps*/NULL, vDesc));
 
-    // Ensure create works when there are no vtags defined in a well-formed vOps
+    // Ensure creat succeeds for empty vendor tag ops
     ASSERT_EQ(OK, VendorTagDescriptor::createDescriptorFromOps(&vOps, vDesc));
 
     // Ensure defaults are returned when no vtags are defined, or tag is unknown