services/camera/libcameraservice/api2/CameraDeviceClient.cpp

/*
 * Copyright (C) 2013-2018 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_TAG "CameraDeviceClient"
#define ATRACE_TAG ATRACE_TAG_CAMERA
//#define LOG_NDEBUG 0

#include <cutils/properties.h>
#include <utils/Log.h>
#include <utils/Trace.h>
#include <gui/Surface.h>
#include <camera/camera2/CaptureRequest.h>
#include <camera/CameraUtils.h>

#include "common/CameraDeviceBase.h"
#include "api2/CameraDeviceClient.h"

#include <camera_metadata_hidden.h>

// Convenience methods for constructing binder::Status objects for error returns

#define STATUS_ERROR(errorCode, errorString) \
    binder::Status::fromServiceSpecificError(errorCode, \
            String8::format("%s:%d: %s", __FUNCTION__, __LINE__, errorString))

#define STATUS_ERROR_FMT(errorCode, errorString, ...) \
    binder::Status::fromServiceSpecificError(errorCode, \
            String8::format("%s:%d: " errorString, __FUNCTION__, __LINE__, \
                    __VA_ARGS__))

namespace android {
using namespace camera2;

CameraDeviceClientBase::CameraDeviceClientBase(
        const sp<CameraService>& cameraService,
        const sp<hardware::camera2::ICameraDeviceCallbacks>& remoteCallback,
        const String16& clientPackageName,
        const String8& cameraId,
        int cameraFacing,
        int clientPid,
        uid_t clientUid,
        int servicePid) :
    BasicClient(cameraService,
            IInterface::asBinder(remoteCallback),
            clientPackageName,
            cameraId,
            cameraFacing,
            clientPid,
            clientUid,
            servicePid),
    mRemoteCallback(remoteCallback) {
}

// Interface used by CameraService

CameraDeviceClient::CameraDeviceClient(const sp<CameraService>& cameraService,
        const sp<hardware::camera2::ICameraDeviceCallbacks>& remoteCallback,
        const String16& clientPackageName,
        const String8& cameraId,
        int cameraFacing,
        int clientPid,
        uid_t clientUid,
        int servicePid) :
    Camera2ClientBase(cameraService, remoteCallback, clientPackageName,
                cameraId, cameraFacing, clientPid, clientUid, servicePid),
    mInputStream(),
    mStreamingRequestId(REQUEST_ID_NONE),
    mRequestIdCounter(0) {

    ATRACE_CALL();
    ALOGI("CameraDeviceClient %s: Opened", cameraId.string());
}

status_t CameraDeviceClient::initialize(sp<CameraProviderManager> manager) {
    return initializeImpl(manager);
}

template<typename TProviderPtr>
status_t CameraDeviceClient::initializeImpl(TProviderPtr providerPtr) {
    ATRACE_CALL();
    status_t res;

    res = Camera2ClientBase::initialize(providerPtr);
    if (res != OK) {
        return res;
    }

    String8 threadName;
    mFrameProcessor = new FrameProcessorBase(mDevice);
    threadName = String8::format("CDU-%s-FrameProc", mCameraIdStr.string());
    mFrameProcessor->run(threadName.string());

    mFrameProcessor->registerListener(FRAME_PROCESSOR_LISTENER_MIN_ID,
                                      FRAME_PROCESSOR_LISTENER_MAX_ID,
                                      /*listener*/this,
                                      /*sendPartials*/true);

    auto deviceInfo = mDevice->info();
    camera_metadata_entry_t physicalKeysEntry = deviceInfo.find(
            ANDROID_REQUEST_AVAILABLE_PHYSICAL_CAMERA_REQUEST_KEYS);
    if (physicalKeysEntry.count > 0) {
        mSupportedPhysicalRequestKeys.insert(mSupportedPhysicalRequestKeys.begin(),
                physicalKeysEntry.data.i32,
                physicalKeysEntry.data.i32 + physicalKeysEntry.count);
    }

    return OK;
}

CameraDeviceClient::~CameraDeviceClient() {
}

binder::Status CameraDeviceClient::submitRequest(
        const hardware::camera2::CaptureRequest& request,
        bool streaming,
        /*out*/
        hardware::camera2::utils::SubmitInfo *submitInfo) {
    std::vector<hardware::camera2::CaptureRequest> requestList = { request };
    return submitRequestList(requestList, streaming, submitInfo);
}

binder::Status CameraDeviceClient::insertGbpLocked(const sp<IGraphicBufferProducer>& gbp,
        SurfaceMap* outSurfaceMap, Vector<int32_t>* outputStreamIds, int32_t *currentStreamId) {
    int idx = mStreamMap.indexOfKey(IInterface::asBinder(gbp));

    // Trying to submit request with surface that wasn't created
    if (idx == NAME_NOT_FOUND) {
        ALOGE("%s: Camera %s: Tried to submit a request with a surface that"
                " we have not called createStream on",
                __FUNCTION__, mCameraIdStr.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                "Request targets Surface that is not part of current capture session");
    }

    const StreamSurfaceId& streamSurfaceId = mStreamMap.valueAt(idx);
    if (outSurfaceMap->find(streamSurfaceId.streamId()) == outSurfaceMap->end()) {
        (*outSurfaceMap)[streamSurfaceId.streamId()] = std::vector<size_t>();
        outputStreamIds->push_back(streamSurfaceId.streamId());
    }
    (*outSurfaceMap)[streamSurfaceId.streamId()].push_back(streamSurfaceId.surfaceId());

    ALOGV("%s: Camera %s: Appending output stream %d surface %d to request",
            __FUNCTION__, mCameraIdStr.string(), streamSurfaceId.streamId(),
            streamSurfaceId.surfaceId());

    if (currentStreamId != nullptr) {
        *currentStreamId = streamSurfaceId.streamId();
    }

    return binder::Status::ok();
}

binder::Status CameraDeviceClient::submitRequestList(
        const std::vector<hardware::camera2::CaptureRequest>& requests,
        bool streaming,
        /*out*/
        hardware::camera2::utils::SubmitInfo *submitInfo) {
    ATRACE_CALL();
    ALOGV("%s-start of function. Request list size %zu", __FUNCTION__, requests.size());

    binder::Status res = binder::Status::ok();
    status_t err;
    if ( !(res = checkPidStatus(__FUNCTION__) ).isOk()) {
        return res;
    }

    Mutex::Autolock icl(mBinderSerializationLock);

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    if (requests.empty()) {
        ALOGE("%s: Camera %s: Sent null request. Rejecting request.",
              __FUNCTION__, mCameraIdStr.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, "Empty request list");
    }

    List<const CameraDeviceBase::PhysicalCameraSettingsList> metadataRequestList;
    std::list<const SurfaceMap> surfaceMapList;
    submitInfo->mRequestId = mRequestIdCounter;
    uint32_t loopCounter = 0;

    for (auto&& request: requests) {
        if (request.mIsReprocess) {
            if (!mInputStream.configured) {
                ALOGE("%s: Camera %s: no input stream is configured.", __FUNCTION__,
                        mCameraIdStr.string());
                return STATUS_ERROR_FMT(CameraService::ERROR_ILLEGAL_ARGUMENT,
                        "No input configured for camera %s but request is for reprocessing",
                        mCameraIdStr.string());
            } else if (streaming) {
                ALOGE("%s: Camera %s: streaming reprocess requests not supported.", __FUNCTION__,
                        mCameraIdStr.string());
                return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                        "Repeating reprocess requests not supported");
            } else if (request.mPhysicalCameraSettings.size() > 1) {
                ALOGE("%s: Camera %s: reprocess requests not supported for "
                        "multiple physical cameras.", __FUNCTION__,
                        mCameraIdStr.string());
                return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                        "Reprocess requests not supported for multiple cameras");
            }
        }

        if (request.mPhysicalCameraSettings.empty()) {
            ALOGE("%s: Camera %s: request doesn't contain any settings.", __FUNCTION__,
                    mCameraIdStr.string());
            return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                    "Request doesn't contain any settings");
        }

        //The first capture settings should always match the logical camera id
        String8 logicalId(request.mPhysicalCameraSettings.begin()->id.c_str());
        if (mDevice->getId() != logicalId) {
            ALOGE("%s: Camera %s: Invalid camera request settings.", __FUNCTION__,
                    mCameraIdStr.string());
            return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                    "Invalid camera request settings");
        }

        if (request.mSurfaceList.isEmpty() && request.mStreamIdxList.size() == 0) {
            ALOGE("%s: Camera %s: Requests must have at least one surface target. "
                    "Rejecting request.", __FUNCTION__, mCameraIdStr.string());
            return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                    "Request has no output targets");
        }

        /**
         * Write in the output stream IDs and map from stream ID to surface ID
         * which we calculate from the capture request's list of surface target
         */
        SurfaceMap surfaceMap;
        Vector<int32_t> outputStreamIds;
        std::vector<std::string> requestedPhysicalIds;
        if (request.mSurfaceList.size() > 0) {
            for (sp<Surface> surface : request.mSurfaceList) {
                if (surface == 0) continue;

                int32_t streamId;
                sp<IGraphicBufferProducer> gbp = surface->getIGraphicBufferProducer();
                res = insertGbpLocked(gbp, &surfaceMap, &outputStreamIds, &streamId);
                if (!res.isOk()) {
                    return res;
                }

                ssize_t index = mConfiguredOutputs.indexOfKey(streamId);
                if (index >= 0) {
                    String8 requestedPhysicalId(
                            mConfiguredOutputs.valueAt(index).getPhysicalCameraId());
                    requestedPhysicalIds.push_back(requestedPhysicalId.string());
                } else {
                    ALOGW("%s: Output stream Id not found among configured outputs!", __FUNCTION__);
                }
            }
        } else {
            for (size_t i = 0; i < request.mStreamIdxList.size(); i++) {
                int streamId = request.mStreamIdxList.itemAt(i);
                int surfaceIdx = request.mSurfaceIdxList.itemAt(i);

                ssize_t index = mConfiguredOutputs.indexOfKey(streamId);
                if (index < 0) {
                    ALOGE("%s: Camera %s: Tried to submit a request with a surface that"
                            " we have not called createStream on: stream %d",
                            __FUNCTION__, mCameraIdStr.string(), streamId);
                    return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                            "Request targets Surface that is not part of current capture session");
                }

                const auto& gbps = mConfiguredOutputs.valueAt(index).getGraphicBufferProducers();
                if ((size_t)surfaceIdx >= gbps.size()) {
                    ALOGE("%s: Camera %s: Tried to submit a request with a surface that"
                            " we have not called createStream on: stream %d, surfaceIdx %d",
                            __FUNCTION__, mCameraIdStr.string(), streamId, surfaceIdx);
                    return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                            "Request targets Surface has invalid surface index");
                }

                res = insertGbpLocked(gbps[surfaceIdx], &surfaceMap, &outputStreamIds, nullptr);
                if (!res.isOk()) {
                    return res;
                }

                String8 requestedPhysicalId(
                        mConfiguredOutputs.valueAt(index).getPhysicalCameraId());
                requestedPhysicalIds.push_back(requestedPhysicalId.string());
            }
        }

        CameraDeviceBase::PhysicalCameraSettingsList physicalSettingsList;
        for (const auto& it : request.mPhysicalCameraSettings) {
            if (it.settings.isEmpty()) {
                ALOGE("%s: Camera %s: Sent empty metadata packet. Rejecting request.",
                        __FUNCTION__, mCameraIdStr.string());
                return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                        "Request settings are empty");
            }

            String8 physicalId(it.id.c_str());
            if (physicalId != mDevice->getId()) {
                auto found = std::find(requestedPhysicalIds.begin(), requestedPhysicalIds.end(),
                        it.id);
                if (found == requestedPhysicalIds.end()) {
                    ALOGE("%s: Camera %s: Physical camera id: %s not part of attached outputs.",
                            __FUNCTION__, mCameraIdStr.string(), physicalId.string());
                    return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                            "Invalid physical camera id");
                }

                if (!mSupportedPhysicalRequestKeys.empty()) {
                    // Filter out any unsupported physical request keys.
                    CameraMetadata filteredParams(mSupportedPhysicalRequestKeys.size());
                    camera_metadata_t *meta = const_cast<camera_metadata_t *>(
                            filteredParams.getAndLock());
                    set_camera_metadata_vendor_id(meta, mDevice->getVendorTagId());
                    filteredParams.unlock(meta);

                    for (const auto& keyIt : mSupportedPhysicalRequestKeys) {
                        camera_metadata_ro_entry entry = it.settings.find(keyIt);
                        if (entry.count > 0) {
                            filteredParams.update(entry);
                        }
                    }

                    physicalSettingsList.push_back({it.id, filteredParams});
                }
            } else {
                physicalSettingsList.push_back({it.id, it.settings});
            }
        }

        if (!enforceRequestPermissions(physicalSettingsList.begin()->metadata)) {
            // Callee logs
            return STATUS_ERROR(CameraService::ERROR_PERMISSION_DENIED,
                    "Caller does not have permission to change restricted controls");
        }

        physicalSettingsList.begin()->metadata.update(ANDROID_REQUEST_OUTPUT_STREAMS,
                &outputStreamIds[0], outputStreamIds.size());

        if (request.mIsReprocess) {
            physicalSettingsList.begin()->metadata.update(ANDROID_REQUEST_INPUT_STREAMS,
                    &mInputStream.id, 1);
        }

        physicalSettingsList.begin()->metadata.update(ANDROID_REQUEST_ID,
                &(submitInfo->mRequestId), /*size*/1);
        loopCounter++; // loopCounter starts from 1
        ALOGV("%s: Camera %s: Creating request with ID %d (%d of %zu)",
                __FUNCTION__, mCameraIdStr.string(), submitInfo->mRequestId,
                loopCounter, requests.size());

        metadataRequestList.push_back(physicalSettingsList);
        surfaceMapList.push_back(surfaceMap);
    }
    mRequestIdCounter++;

    if (streaming) {
        err = mDevice->setStreamingRequestList(metadataRequestList, surfaceMapList,
                &(submitInfo->mLastFrameNumber));
        if (err != OK) {
            String8 msg = String8::format(
                "Camera %s:  Got error %s (%d) after trying to set streaming request",
                mCameraIdStr.string(), strerror(-err), err);
            ALOGE("%s: %s", __FUNCTION__, msg.string());
            res = STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION,
                    msg.string());
        } else {
            Mutex::Autolock idLock(mStreamingRequestIdLock);
            mStreamingRequestId = submitInfo->mRequestId;
        }
    } else {
        err = mDevice->captureList(metadataRequestList, surfaceMapList,
                &(submitInfo->mLastFrameNumber));
        if (err != OK) {
            String8 msg = String8::format(
                "Camera %s: Got error %s (%d) after trying to submit capture request",
                mCameraIdStr.string(), strerror(-err), err);
            ALOGE("%s: %s", __FUNCTION__, msg.string());
            res = STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION,
                    msg.string());
        }
        ALOGV("%s: requestId = %d ", __FUNCTION__, submitInfo->mRequestId);
    }

    ALOGV("%s: Camera %s: End of function", __FUNCTION__, mCameraIdStr.string());
    return res;
}

binder::Status CameraDeviceClient::cancelRequest(
        int requestId,
        /*out*/
        int64_t* lastFrameNumber) {
    ATRACE_CALL();
    ALOGV("%s, requestId = %d", __FUNCTION__, requestId);

    status_t err;
    binder::Status res;

    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    Mutex::Autolock idLock(mStreamingRequestIdLock);
    if (mStreamingRequestId != requestId) {
        String8 msg = String8::format("Camera %s: Canceling request ID %d doesn't match "
                "current request ID %d", mCameraIdStr.string(), requestId, mStreamingRequestId);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }

    err = mDevice->clearStreamingRequest(lastFrameNumber);

    if (err == OK) {
        ALOGV("%s: Camera %s: Successfully cleared streaming request",
                __FUNCTION__, mCameraIdStr.string());
        mStreamingRequestId = REQUEST_ID_NONE;
    } else {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error clearing streaming request: %s (%d)",
                mCameraIdStr.string(), strerror(-err), err);
    }

    return res;
}

binder::Status CameraDeviceClient::beginConfigure() {
    // TODO: Implement this.
    ATRACE_CALL();
    ALOGV("%s: Not implemented yet.", __FUNCTION__);
    return binder::Status::ok();
}

binder::Status CameraDeviceClient::endConfigure(int operatingMode,
        const hardware::camera2::impl::CameraMetadataNative& sessionParams) {
    ATRACE_CALL();
    ALOGV("%s: ending configure (%d input stream, %zu output surfaces)",
            __FUNCTION__, mInputStream.configured ? 1 : 0,
            mStreamMap.size());

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    if (operatingMode < 0) {
        String8 msg = String8::format(
            "Camera %s: Invalid operating mode %d requested", mCameraIdStr.string(), operatingMode);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                msg.string());
    }

    // Sanitize the high speed session against necessary capability bit.
    bool isConstrainedHighSpeed = (operatingMode == ICameraDeviceUser::CONSTRAINED_HIGH_SPEED_MODE);
    if (isConstrainedHighSpeed) {
        CameraMetadata staticInfo = mDevice->info();
        camera_metadata_entry_t entry = staticInfo.find(ANDROID_REQUEST_AVAILABLE_CAPABILITIES);
        bool isConstrainedHighSpeedSupported = false;
        for(size_t i = 0; i < entry.count; ++i) {
            uint8_t capability = entry.data.u8[i];
            if (capability == ANDROID_REQUEST_AVAILABLE_CAPABILITIES_CONSTRAINED_HIGH_SPEED_VIDEO) {
                isConstrainedHighSpeedSupported = true;
                break;
            }
        }
        if (!isConstrainedHighSpeedSupported) {
            String8 msg = String8::format(
                "Camera %s: Try to create a constrained high speed configuration on a device"
                " that doesn't support it.", mCameraIdStr.string());
            ALOGE("%s: %s", __FUNCTION__, msg.string());
            return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                    msg.string());
        }
    }

    status_t err = mDevice->configureStreams(sessionParams, operatingMode);
    if (err == BAD_VALUE) {
        String8 msg = String8::format("Camera %s: Unsupported set of inputs/outputs provided",
                mCameraIdStr.string());
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        res = STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    } else if (err != OK) {
        String8 msg = String8::format("Camera %s: Error configuring streams: %s (%d)",
                mCameraIdStr.string(), strerror(-err), err);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        res = STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION, msg.string());
    }

    return res;
}

binder::Status CameraDeviceClient::deleteStream(int streamId) {
    ATRACE_CALL();
    ALOGV("%s (streamId = 0x%x)", __FUNCTION__, streamId);

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    bool isInput = false;
    std::vector<sp<IBinder>> surfaces;
    ssize_t dIndex = NAME_NOT_FOUND;

    if (mInputStream.configured && mInputStream.id == streamId) {
        isInput = true;
    } else {
        // Guard against trying to delete non-created streams
        for (size_t i = 0; i < mStreamMap.size(); ++i) {
            if (streamId == mStreamMap.valueAt(i).streamId()) {
                surfaces.push_back(mStreamMap.keyAt(i));
            }
        }

        // See if this stream is one of the deferred streams.
        for (size_t i = 0; i < mDeferredStreams.size(); ++i) {
            if (streamId == mDeferredStreams[i]) {
                dIndex = i;
                break;
            }
        }

        if (surfaces.empty() && dIndex == NAME_NOT_FOUND) {
            String8 msg = String8::format("Camera %s: Invalid stream ID (%d) specified, no such"
                    " stream created yet", mCameraIdStr.string(), streamId);
            ALOGW("%s: %s", __FUNCTION__, msg.string());
            return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
        }
    }

    // Also returns BAD_VALUE if stream ID was not valid
    status_t err = mDevice->deleteStream(streamId);

    if (err != OK) {
        String8 msg = String8::format("Camera %s: Unexpected error %s (%d) when deleting stream %d",
                mCameraIdStr.string(), strerror(-err), err, streamId);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        res = STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION, msg.string());
    } else {
        if (isInput) {
            mInputStream.configured = false;
        } else {
            for (auto& surface : surfaces) {
                mStreamMap.removeItem(surface);
            }

            mConfiguredOutputs.removeItem(streamId);

            if (dIndex != NAME_NOT_FOUND) {
                mDeferredStreams.removeItemsAt(dIndex);
            }
        }
    }

    return res;
}

binder::Status CameraDeviceClient::createStream(
        const hardware::camera2::params::OutputConfiguration &outputConfiguration,
        /*out*/
        int32_t* newStreamId) {
    ATRACE_CALL();

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    const std::vector<sp<IGraphicBufferProducer>>& bufferProducers =
            outputConfiguration.getGraphicBufferProducers();
    size_t numBufferProducers = bufferProducers.size();
    bool deferredConsumer = outputConfiguration.isDeferred();
    bool isShared = outputConfiguration.isShared();
    String8 physicalCameraId = String8(outputConfiguration.getPhysicalCameraId());

    if (numBufferProducers > MAX_SURFACES_PER_STREAM) {
        ALOGE("%s: GraphicBufferProducer count %zu for stream exceeds limit of %d",
              __FUNCTION__, bufferProducers.size(), MAX_SURFACES_PER_STREAM);
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, "Surface count is too high");
    }
    bool deferredConsumerOnly = deferredConsumer && numBufferProducers == 0;
    int surfaceType = outputConfiguration.getSurfaceType();
    bool validSurfaceType = ((surfaceType == OutputConfiguration::SURFACE_TYPE_SURFACE_VIEW) ||
            (surfaceType == OutputConfiguration::SURFACE_TYPE_SURFACE_TEXTURE));

    if (deferredConsumer && !validSurfaceType) {
        ALOGE("%s: Target surface is invalid: bufferProducer = %p, surfaceType = %d.",
                __FUNCTION__, bufferProducers[0].get(), surfaceType);
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, "Target Surface is invalid");
    }

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    if (!checkPhysicalCameraId(physicalCameraId)) {
        String8 msg = String8::format("Camera %s: Camera doesn't support physicalCameraId %s.",
                    mCameraIdStr.string(), physicalCameraId.string());
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }
    std::vector<sp<Surface>> surfaces;
    std::vector<sp<IBinder>> binders;
    status_t err;

    // Create stream for deferred surface case.
    if (deferredConsumerOnly) {
        return createDeferredSurfaceStreamLocked(outputConfiguration, isShared, newStreamId);
    }

    OutputStreamInfo streamInfo;
    bool isStreamInfoValid = false;
    for (auto& bufferProducer : bufferProducers) {
        // Don't create multiple streams for the same target surface
        sp<IBinder> binder = IInterface::asBinder(bufferProducer);
        ssize_t index = mStreamMap.indexOfKey(binder);
        if (index != NAME_NOT_FOUND) {
            String8 msg = String8::format("Camera %s: Surface already has a stream created for it "
                    "(ID %zd)", mCameraIdStr.string(), index);
            ALOGW("%s: %s", __FUNCTION__, msg.string());
            return STATUS_ERROR(CameraService::ERROR_ALREADY_EXISTS, msg.string());
        }

        sp<Surface> surface;
        res = createSurfaceFromGbp(streamInfo, isStreamInfoValid, surface, bufferProducer);

        if (!res.isOk())
            return res;

        if (!isStreamInfoValid) {
            // Streaming sharing is only supported for IMPLEMENTATION_DEFINED
            // formats.
            if (isShared && streamInfo.format != HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED) {
                String8 msg = String8::format("Camera %s: Stream sharing is only supported for "
                        "IMPLEMENTATION_DEFINED format", mCameraIdStr.string());
                ALOGW("%s: %s", __FUNCTION__, msg.string());
                return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
            }
            isStreamInfoValid = true;
        }

        binders.push_back(IInterface::asBinder(bufferProducer));
        surfaces.push_back(surface);
    }

    int streamId = camera3::CAMERA3_STREAM_ID_INVALID;
    std::vector<int> surfaceIds;
    err = mDevice->createStream(surfaces, deferredConsumer, streamInfo.width,
            streamInfo.height, streamInfo.format, streamInfo.dataSpace,
            static_cast<camera3_stream_rotation_t>(outputConfiguration.getRotation()),
            &streamId, physicalCameraId, &surfaceIds, outputConfiguration.getSurfaceSetID(),
            isShared);

    if (err != OK) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error creating output stream (%d x %d, fmt %x, dataSpace %x): %s (%d)",
                mCameraIdStr.string(), streamInfo.width, streamInfo.height, streamInfo.format,
                streamInfo.dataSpace, strerror(-err), err);
    } else {
        int i = 0;
        for (auto& binder : binders) {
            ALOGV("%s: mStreamMap add binder %p streamId %d, surfaceId %d",
                    __FUNCTION__, binder.get(), streamId, i);
            mStreamMap.add(binder, StreamSurfaceId(streamId, surfaceIds[i]));
            i++;
        }

        mConfiguredOutputs.add(streamId, outputConfiguration);
        mStreamInfoMap[streamId] = streamInfo;

        ALOGV("%s: Camera %s: Successfully created a new stream ID %d for output surface"
                    " (%d x %d) with format 0x%x.",
                  __FUNCTION__, mCameraIdStr.string(), streamId, streamInfo.width,
                  streamInfo.height, streamInfo.format);

        // Set transform flags to ensure preview to be rotated correctly.
        res = setStreamTransformLocked(streamId);

        *newStreamId = streamId;
    }

    return res;
}

binder::Status CameraDeviceClient::createDeferredSurfaceStreamLocked(
        const hardware::camera2::params::OutputConfiguration &outputConfiguration,
        bool isShared,
        /*out*/
        int* newStreamId) {
    int width, height, format, surfaceType;
    uint64_t consumerUsage;
    android_dataspace dataSpace;
    status_t err;
    binder::Status res;

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    // Infer the surface info for deferred surface stream creation.
    width = outputConfiguration.getWidth();
    height = outputConfiguration.getHeight();
    surfaceType = outputConfiguration.getSurfaceType();
    format = HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
    dataSpace = android_dataspace_t::HAL_DATASPACE_UNKNOWN;
    // Hardcode consumer usage flags: SurfaceView--0x900, SurfaceTexture--0x100.
    consumerUsage = GraphicBuffer::USAGE_HW_TEXTURE;
    if (surfaceType == OutputConfiguration::SURFACE_TYPE_SURFACE_VIEW) {
        consumerUsage |= GraphicBuffer::USAGE_HW_COMPOSER;
    }
    int streamId = camera3::CAMERA3_STREAM_ID_INVALID;
    std::vector<sp<Surface>> noSurface;
    std::vector<int> surfaceIds;
    String8 physicalCameraId(outputConfiguration.getPhysicalCameraId());
    err = mDevice->createStream(noSurface, /*hasDeferredConsumer*/true, width,
            height, format, dataSpace,
            static_cast<camera3_stream_rotation_t>(outputConfiguration.getRotation()),
            &streamId, physicalCameraId, &surfaceIds,
            outputConfiguration.getSurfaceSetID(), isShared,
            consumerUsage);

    if (err != OK) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error creating output stream (%d x %d, fmt %x, dataSpace %x): %s (%d)",
                mCameraIdStr.string(), width, height, format, dataSpace, strerror(-err), err);
    } else {
        // Can not add streamId to mStreamMap here, as the surface is deferred. Add it to
        // a separate list to track. Once the deferred surface is set, this id will be
        // relocated to mStreamMap.
        mDeferredStreams.push_back(streamId);

        mStreamInfoMap.emplace(std::piecewise_construct, std::forward_as_tuple(streamId),
                std::forward_as_tuple(width, height, format, dataSpace, consumerUsage));

        ALOGV("%s: Camera %s: Successfully created a new stream ID %d for a deferred surface"
                " (%d x %d) stream with format 0x%x.",
              __FUNCTION__, mCameraIdStr.string(), streamId, width, height, format);

        // Set transform flags to ensure preview to be rotated correctly.
        res = setStreamTransformLocked(streamId);

        *newStreamId = streamId;
    }
    return res;
}

binder::Status CameraDeviceClient::setStreamTransformLocked(int streamId) {
    int32_t transform = 0;
    status_t err;
    binder::Status res;

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    err = getRotationTransformLocked(&transform);
    if (err != OK) {
        // Error logged by getRotationTransformLocked.
        return STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION,
                "Unable to calculate rotation transform for new stream");
    }

    err = mDevice->setStreamTransform(streamId, transform);
    if (err != OK) {
        String8 msg = String8::format("Failed to set stream transform (stream id %d)",
                streamId);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION, msg.string());
    }

    return res;
}

binder::Status CameraDeviceClient::createInputStream(
        int width, int height, int format,
        /*out*/
        int32_t* newStreamId) {

    ATRACE_CALL();
    ALOGV("%s (w = %d, h = %d, f = 0x%x)", __FUNCTION__, width, height, format);

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    if (mInputStream.configured) {
        String8 msg = String8::format("Camera %s: Already has an input stream "
                "configured (ID %d)", mCameraIdStr.string(), mInputStream.id);
        ALOGE("%s: %s", __FUNCTION__, msg.string() );
        return STATUS_ERROR(CameraService::ERROR_ALREADY_EXISTS, msg.string());
    }

    int streamId = -1;
    status_t err = mDevice->createInputStream(width, height, format, &streamId);
    if (err == OK) {
        mInputStream.configured = true;
        mInputStream.width = width;
        mInputStream.height = height;
        mInputStream.format = format;
        mInputStream.id = streamId;

        ALOGV("%s: Camera %s: Successfully created a new input stream ID %d",
                __FUNCTION__, mCameraIdStr.string(), streamId);

        *newStreamId = streamId;
    } else {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error creating new input stream: %s (%d)", mCameraIdStr.string(),
                strerror(-err), err);
    }

    return res;
}

binder::Status CameraDeviceClient::getInputSurface(/*out*/ view::Surface *inputSurface) {

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    if (inputSurface == NULL) {
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, "Null input surface");
    }

    Mutex::Autolock icl(mBinderSerializationLock);
    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }
    sp<IGraphicBufferProducer> producer;
    status_t err = mDevice->getInputBufferProducer(&producer);
    if (err != OK) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error getting input Surface: %s (%d)",
                mCameraIdStr.string(), strerror(-err), err);
    } else {
        inputSurface->name = String16("CameraInput");
        inputSurface->graphicBufferProducer = producer;
    }
    return res;
}

binder::Status CameraDeviceClient::updateOutputConfiguration(int streamId,
        const hardware::camera2::params::OutputConfiguration &outputConfiguration) {
    ATRACE_CALL();

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    const std::vector<sp<IGraphicBufferProducer> >& bufferProducers =
            outputConfiguration.getGraphicBufferProducers();
    auto producerCount = bufferProducers.size();
    if (producerCount == 0) {
        ALOGE("%s: bufferProducers must not be empty", __FUNCTION__);
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                "bufferProducers must not be empty");
    }

    // The first output is the one associated with the output configuration.
    // It should always be present, valid and the corresponding stream id should match.
    sp<IBinder> binder = IInterface::asBinder(bufferProducers[0]);
    ssize_t index = mStreamMap.indexOfKey(binder);
    if (index == NAME_NOT_FOUND) {
        ALOGE("%s: Outputconfiguration is invalid", __FUNCTION__);
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                "OutputConfiguration is invalid");
    }
    if (mStreamMap.valueFor(binder).streamId() != streamId) {
        ALOGE("%s: Stream Id: %d provided doesn't match the id: %d in the stream map",
                __FUNCTION__, streamId, mStreamMap.valueFor(binder).streamId());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                "Stream id is invalid");
    }

    std::vector<size_t> removedSurfaceIds;
    std::vector<sp<IBinder>> removedOutputs;
    std::vector<sp<Surface>> newOutputs;
    std::vector<OutputStreamInfo> streamInfos;
    KeyedVector<sp<IBinder>, sp<IGraphicBufferProducer>> newOutputsMap;
    for (auto &it : bufferProducers) {
        newOutputsMap.add(IInterface::asBinder(it), it);
    }

    for (size_t i = 0; i < mStreamMap.size(); i++) {
        ssize_t idx = newOutputsMap.indexOfKey(mStreamMap.keyAt(i));
        if (idx == NAME_NOT_FOUND) {
            if (mStreamMap[i].streamId() == streamId) {
                removedSurfaceIds.push_back(mStreamMap[i].surfaceId());
                removedOutputs.push_back(mStreamMap.keyAt(i));
            }
        } else {
            if (mStreamMap[i].streamId() != streamId) {
                ALOGE("%s: Output surface already part of a different stream", __FUNCTION__);
                return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT,
                        "Target Surface is invalid");
            }
            newOutputsMap.removeItemsAt(idx);
        }
    }

    for (size_t i = 0; i < newOutputsMap.size(); i++) {
        OutputStreamInfo outInfo;
        sp<Surface> surface;
        res = createSurfaceFromGbp(outInfo, /*isStreamInfoValid*/ false, surface,
                newOutputsMap.valueAt(i));
        if (!res.isOk())
            return res;

        // Stream sharing is only supported for IMPLEMENTATION_DEFINED
        // formats.
        if (outInfo.format != HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED) {
            String8 msg = String8::format("Camera %s: Stream sharing is only supported for "
                    "IMPLEMENTATION_DEFINED format", mCameraIdStr.string());
            ALOGW("%s: %s", __FUNCTION__, msg.string());
            return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
        }
        streamInfos.push_back(outInfo);
        newOutputs.push_back(surface);
    }

    //Trivial case no changes required
    if (removedSurfaceIds.empty() && newOutputs.empty()) {
        return binder::Status::ok();
    }

    KeyedVector<sp<Surface>, size_t> outputMap;
    auto ret = mDevice->updateStream(streamId, newOutputs, streamInfos, removedSurfaceIds,
            &outputMap);
    if (ret != OK) {
        switch (ret) {
            case NAME_NOT_FOUND:
            case BAD_VALUE:
            case -EBUSY:
                res = STATUS_ERROR_FMT(CameraService::ERROR_ILLEGAL_ARGUMENT,
                        "Camera %s: Error updating stream: %s (%d)",
                        mCameraIdStr.string(), strerror(ret), ret);
                break;
            default:
                res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                        "Camera %s: Error updating stream: %s (%d)",
                        mCameraIdStr.string(), strerror(ret), ret);
                break;
        }
    } else {
        for (const auto &it : removedOutputs) {
            mStreamMap.removeItem(it);
        }

        for (size_t i = 0; i < outputMap.size(); i++) {
            mStreamMap.add(IInterface::asBinder(outputMap.keyAt(i)->getIGraphicBufferProducer()),
                    StreamSurfaceId(streamId, outputMap.valueAt(i)));
        }

        mConfiguredOutputs.replaceValueFor(streamId, outputConfiguration);

        ALOGV("%s: Camera %s: Successful stream ID %d update",
                  __FUNCTION__, mCameraIdStr.string(), streamId);
    }

    return res;
}

bool CameraDeviceClient::isPublicFormat(int32_t format)
{
    switch(format) {
        case HAL_PIXEL_FORMAT_RGBA_8888:
        case HAL_PIXEL_FORMAT_RGBX_8888:
        case HAL_PIXEL_FORMAT_RGB_888:
        case HAL_PIXEL_FORMAT_RGB_565:
        case HAL_PIXEL_FORMAT_BGRA_8888:
        case HAL_PIXEL_FORMAT_YV12:
        case HAL_PIXEL_FORMAT_Y8:
        case HAL_PIXEL_FORMAT_Y16:
        case HAL_PIXEL_FORMAT_RAW16:
        case HAL_PIXEL_FORMAT_RAW10:
        case HAL_PIXEL_FORMAT_RAW12:
        case HAL_PIXEL_FORMAT_RAW_OPAQUE:
        case HAL_PIXEL_FORMAT_BLOB:
        case HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED:
        case HAL_PIXEL_FORMAT_YCbCr_420_888:
        case HAL_PIXEL_FORMAT_YCbCr_422_888:
        case HAL_PIXEL_FORMAT_YCbCr_444_888:
        case HAL_PIXEL_FORMAT_FLEX_RGB_888:
        case HAL_PIXEL_FORMAT_FLEX_RGBA_8888:
        case HAL_PIXEL_FORMAT_YCbCr_422_SP:
        case HAL_PIXEL_FORMAT_YCrCb_420_SP:
        case HAL_PIXEL_FORMAT_YCbCr_422_I:
            return true;
        default:
            return false;
    }
}

binder::Status CameraDeviceClient::createSurfaceFromGbp(
        OutputStreamInfo& streamInfo, bool isStreamInfoValid,
        sp<Surface>& surface, const sp<IGraphicBufferProducer>& gbp) {

    // bufferProducer must be non-null
    if (gbp == nullptr) {
        String8 msg = String8::format("Camera %s: Surface is NULL", mCameraIdStr.string());
        ALOGW("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }
    // HACK b/10949105
    // Query consumer usage bits to set async operation mode for
    // GLConsumer using controlledByApp parameter.
    bool useAsync = false;
    uint64_t consumerUsage = 0;
    status_t err;
    if ((err = gbp->getConsumerUsage(&consumerUsage)) != OK) {
        String8 msg = String8::format("Camera %s: Failed to query Surface consumer usage: %s (%d)",
                mCameraIdStr.string(), strerror(-err), err);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION, msg.string());
    }
    if (consumerUsage & GraphicBuffer::USAGE_HW_TEXTURE) {
        ALOGW("%s: Camera %s with consumer usage flag: %" PRIu64 ": Forcing asynchronous mode for stream",
                __FUNCTION__, mCameraIdStr.string(), consumerUsage);
        useAsync = true;
    }

    uint64_t disallowedFlags = GraphicBuffer::USAGE_HW_VIDEO_ENCODER |
                              GRALLOC_USAGE_RENDERSCRIPT;
    uint64_t allowedFlags = GraphicBuffer::USAGE_SW_READ_MASK |
                           GraphicBuffer::USAGE_HW_TEXTURE |
                           GraphicBuffer::USAGE_HW_COMPOSER;
    bool flexibleConsumer = (consumerUsage & disallowedFlags) == 0 &&
            (consumerUsage & allowedFlags) != 0;

    surface = new Surface(gbp, useAsync);
    ANativeWindow *anw = surface.get();

    int width, height, format;
    android_dataspace dataSpace;
    if ((err = anw->query(anw, NATIVE_WINDOW_WIDTH, &width)) != OK) {
        String8 msg = String8::format("Camera %s: Failed to query Surface width: %s (%d)",
                 mCameraIdStr.string(), strerror(-err), err);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION, msg.string());
    }
    if ((err = anw->query(anw, NATIVE_WINDOW_HEIGHT, &height)) != OK) {
        String8 msg = String8::format("Camera %s: Failed to query Surface height: %s (%d)",
                mCameraIdStr.string(), strerror(-err), err);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION, msg.string());
    }
    if ((err = anw->query(anw, NATIVE_WINDOW_FORMAT, &format)) != OK) {
        String8 msg = String8::format("Camera %s: Failed to query Surface format: %s (%d)",
                mCameraIdStr.string(), strerror(-err), err);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION, msg.string());
    }
    if ((err = anw->query(anw, NATIVE_WINDOW_DEFAULT_DATASPACE,
            reinterpret_cast<int*>(&dataSpace))) != OK) {
        String8 msg = String8::format("Camera %s: Failed to query Surface dataspace: %s (%d)",
                mCameraIdStr.string(), strerror(-err), err);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION, msg.string());
    }

    // FIXME: remove this override since the default format should be
    //       IMPLEMENTATION_DEFINED. b/9487482
    if (format >= HAL_PIXEL_FORMAT_RGBA_8888 &&
        format <= HAL_PIXEL_FORMAT_BGRA_8888) {
        ALOGW("%s: Camera %s: Overriding format %#x to IMPLEMENTATION_DEFINED",
                __FUNCTION__, mCameraIdStr.string(), format);
        format = HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
    }
    // Round dimensions to the nearest dimensions available for this format
    if (flexibleConsumer && isPublicFormat(format) &&
            !CameraDeviceClient::roundBufferDimensionNearest(width, height,
            format, dataSpace, mDevice->info(), /*out*/&width, /*out*/&height)) {
        String8 msg = String8::format("Camera %s: No supported stream configurations with "
                "format %#x defined, failed to create output stream",
                mCameraIdStr.string(), format);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }

    if (!isStreamInfoValid) {
        streamInfo.width = width;
        streamInfo.height = height;
        streamInfo.format = format;
        streamInfo.dataSpace = dataSpace;
        streamInfo.consumerUsage = consumerUsage;
        return binder::Status::ok();
    }
    if (width != streamInfo.width) {
        String8 msg = String8::format("Camera %s:Surface width doesn't match: %d vs %d",
                mCameraIdStr.string(), width, streamInfo.width);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }
    if (height != streamInfo.height) {
        String8 msg = String8::format("Camera %s:Surface height doesn't match: %d vs %d",
                 mCameraIdStr.string(), height, streamInfo.height);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }
    if (format != streamInfo.format) {
        String8 msg = String8::format("Camera %s:Surface format doesn't match: %d vs %d",
                 mCameraIdStr.string(), format, streamInfo.format);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }
    if (format != HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED) {
        if (dataSpace != streamInfo.dataSpace) {
            String8 msg = String8::format("Camera %s:Surface dataSpace doesn't match: %d vs %d",
                    mCameraIdStr.string(), dataSpace, streamInfo.dataSpace);
            ALOGE("%s: %s", __FUNCTION__, msg.string());
            return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
        }
        //At the native side, there isn't a way to check whether 2 surfaces come from the same
        //surface class type. Use usage flag to approximate the comparison.
        if (consumerUsage != streamInfo.consumerUsage) {
            String8 msg = String8::format(
                    "Camera %s:Surface usage flag doesn't match %" PRIu64 " vs %" PRIu64 "",
                    mCameraIdStr.string(), consumerUsage, streamInfo.consumerUsage);
            ALOGE("%s: %s", __FUNCTION__, msg.string());
            return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
        }
    }
    return binder::Status::ok();
}

bool CameraDeviceClient::checkPhysicalCameraId(const String8& physicalCameraId) {
    if (0 == physicalCameraId.size()) {
        return true;
    }

    CameraMetadata staticInfo = mDevice->info();
    camera_metadata_entry_t entryCap;
    bool isLogicalCam = false;

    entryCap = staticInfo.find(ANDROID_REQUEST_AVAILABLE_CAPABILITIES);
    for (size_t i = 0; i < entryCap.count; ++i) {
        uint8_t capability = entryCap.data.u8[i];
        if (capability == ANDROID_REQUEST_AVAILABLE_CAPABILITIES_LOGICAL_MULTI_CAMERA) {
            isLogicalCam = true;
        }
    }
    if (!isLogicalCam) {
        return false;
    }

    camera_metadata_entry_t entryIds = staticInfo.find(ANDROID_LOGICAL_MULTI_CAMERA_PHYSICAL_IDS);
    const uint8_t* ids = entryIds.data.u8;
    size_t start = 0;
    for (size_t i = 0; i < entryIds.count; ++i) {
        if (ids[i] == '\0') {
            if (start != i) {
                String8 currentId((const char*)ids+start);
                if (currentId == physicalCameraId) {
                    return true;
                }
            }
            start = i+1;
        }
    }
    return false;
}

bool CameraDeviceClient::roundBufferDimensionNearest(int32_t width, int32_t height,
        int32_t format, android_dataspace dataSpace, const CameraMetadata& info,
        /*out*/int32_t* outWidth, /*out*/int32_t* outHeight) {

    camera_metadata_ro_entry streamConfigs =
            (dataSpace == HAL_DATASPACE_DEPTH) ?
            info.find(ANDROID_DEPTH_AVAILABLE_DEPTH_STREAM_CONFIGURATIONS) :
            info.find(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS);

    int32_t bestWidth = -1;
    int32_t bestHeight = -1;

    // Iterate through listed stream configurations and find the one with the smallest euclidean
    // distance from the given dimensions for the given format.
    for (size_t i = 0; i < streamConfigs.count; i += 4) {
        int32_t fmt = streamConfigs.data.i32[i];
        int32_t w = streamConfigs.data.i32[i + 1];
        int32_t h = streamConfigs.data.i32[i + 2];

        // Ignore input/output type for now
        if (fmt == format) {
            if (w == width && h == height) {
                bestWidth = width;
                bestHeight = height;
                break;
            } else if (w <= ROUNDING_WIDTH_CAP && (bestWidth == -1 ||
                    CameraDeviceClient::euclidDistSquare(w, h, width, height) <
                    CameraDeviceClient::euclidDistSquare(bestWidth, bestHeight, width, height))) {
                bestWidth = w;
                bestHeight = h;
            }
        }
    }

    if (bestWidth == -1) {
        // Return false if no configurations for this format were listed
        return false;
    }

    // Set the outputs to the closet width/height
    if (outWidth != NULL) {
        *outWidth = bestWidth;
    }
    if (outHeight != NULL) {
        *outHeight = bestHeight;
    }

    // Return true if at least one configuration for this format was listed
    return true;
}

int64_t CameraDeviceClient::euclidDistSquare(int32_t x0, int32_t y0, int32_t x1, int32_t y1) {
    int64_t d0 = x0 - x1;
    int64_t d1 = y0 - y1;
    return d0 * d0 + d1 * d1;
}

// Create a request object from a template.
binder::Status CameraDeviceClient::createDefaultRequest(int templateId,
        /*out*/
        hardware::camera2::impl::CameraMetadataNative* request)
{
    ATRACE_CALL();
    ALOGV("%s (templateId = 0x%x)", __FUNCTION__, templateId);

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    CameraMetadata metadata;
    status_t err;
    if ( (err = mDevice->createDefaultRequest(templateId, &metadata) ) == OK &&
        request != NULL) {

        request->swap(metadata);
    } else if (err == BAD_VALUE) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_ILLEGAL_ARGUMENT,
                "Camera %s: Template ID %d is invalid or not supported: %s (%d)",
                mCameraIdStr.string(), templateId, strerror(-err), err);

    } else {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error creating default request for template %d: %s (%d)",
                mCameraIdStr.string(), templateId, strerror(-err), err);
    }
    return res;
}

binder::Status CameraDeviceClient::getCameraInfo(
        /*out*/
        hardware::camera2::impl::CameraMetadataNative* info)
{
    ATRACE_CALL();
    ALOGV("%s", __FUNCTION__);

    binder::Status res;

    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    if (info != NULL) {
        *info = mDevice->info(); // static camera metadata
        // TODO: merge with device-specific camera metadata
    }

    return res;
}

binder::Status CameraDeviceClient::waitUntilIdle()
{
    ATRACE_CALL();
    ALOGV("%s", __FUNCTION__);

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    // FIXME: Also need check repeating burst.
    Mutex::Autolock idLock(mStreamingRequestIdLock);
    if (mStreamingRequestId != REQUEST_ID_NONE) {
        String8 msg = String8::format(
            "Camera %s: Try to waitUntilIdle when there are active streaming requests",
            mCameraIdStr.string());
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_INVALID_OPERATION, msg.string());
    }
    status_t err = mDevice->waitUntilDrained();
    if (err != OK) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error waiting to drain: %s (%d)",
                mCameraIdStr.string(), strerror(-err), err);
    }
    ALOGV("%s Done", __FUNCTION__);
    return res;
}

binder::Status CameraDeviceClient::flush(
        /*out*/
        int64_t* lastFrameNumber) {
    ATRACE_CALL();
    ALOGV("%s", __FUNCTION__);

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    Mutex::Autolock idLock(mStreamingRequestIdLock);
    mStreamingRequestId = REQUEST_ID_NONE;
    status_t err = mDevice->flush(lastFrameNumber);
    if (err != OK) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error flushing device: %s (%d)", mCameraIdStr.string(), strerror(-err), err);
    }
    return res;
}

binder::Status CameraDeviceClient::prepare(int streamId) {
    ATRACE_CALL();
    ALOGV("%s", __FUNCTION__);

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    // Guard against trying to prepare non-created streams
    ssize_t index = NAME_NOT_FOUND;
    for (size_t i = 0; i < mStreamMap.size(); ++i) {
        if (streamId == mStreamMap.valueAt(i).streamId()) {
            index = i;
            break;
        }
    }

    if (index == NAME_NOT_FOUND) {
        String8 msg = String8::format("Camera %s: Invalid stream ID (%d) specified, no stream "
              "with that ID exists", mCameraIdStr.string(), streamId);
        ALOGW("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }

    // Also returns BAD_VALUE if stream ID was not valid, or stream already
    // has been used
    status_t err = mDevice->prepare(streamId);
    if (err == BAD_VALUE) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_ILLEGAL_ARGUMENT,
                "Camera %s: Stream %d has already been used, and cannot be prepared",
                mCameraIdStr.string(), streamId);
    } else if (err != OK) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error preparing stream %d: %s (%d)", mCameraIdStr.string(), streamId,
                strerror(-err), err);
    }
    return res;
}

binder::Status CameraDeviceClient::prepare2(int maxCount, int streamId) {
    ATRACE_CALL();
    ALOGV("%s", __FUNCTION__);

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    // Guard against trying to prepare non-created streams
    ssize_t index = NAME_NOT_FOUND;
    for (size_t i = 0; i < mStreamMap.size(); ++i) {
        if (streamId == mStreamMap.valueAt(i).streamId()) {
            index = i;
            break;
        }
    }

    if (index == NAME_NOT_FOUND) {
        String8 msg = String8::format("Camera %s: Invalid stream ID (%d) specified, no stream "
              "with that ID exists", mCameraIdStr.string(), streamId);
        ALOGW("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }

    if (maxCount <= 0) {
        String8 msg = String8::format("Camera %s: maxCount (%d) must be greater than 0",
                mCameraIdStr.string(), maxCount);
        ALOGE("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }

    // Also returns BAD_VALUE if stream ID was not valid, or stream already
    // has been used
    status_t err = mDevice->prepare(maxCount, streamId);
    if (err == BAD_VALUE) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_ILLEGAL_ARGUMENT,
                "Camera %s: Stream %d has already been used, and cannot be prepared",
                mCameraIdStr.string(), streamId);
    } else if (err != OK) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error preparing stream %d: %s (%d)", mCameraIdStr.string(), streamId,
                strerror(-err), err);
    }

    return res;
}

binder::Status CameraDeviceClient::tearDown(int streamId) {
    ATRACE_CALL();
    ALOGV("%s", __FUNCTION__);

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    // Guard against trying to prepare non-created streams
    ssize_t index = NAME_NOT_FOUND;
    for (size_t i = 0; i < mStreamMap.size(); ++i) {
        if (streamId == mStreamMap.valueAt(i).streamId()) {
            index = i;
            break;
        }
    }

    if (index == NAME_NOT_FOUND) {
        String8 msg = String8::format("Camera %s: Invalid stream ID (%d) specified, no stream "
              "with that ID exists", mCameraIdStr.string(), streamId);
        ALOGW("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }

    // Also returns BAD_VALUE if stream ID was not valid or if the stream is in
    // use
    status_t err = mDevice->tearDown(streamId);
    if (err == BAD_VALUE) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_ILLEGAL_ARGUMENT,
                "Camera %s: Stream %d is still in use, cannot be torn down",
                mCameraIdStr.string(), streamId);
    } else if (err != OK) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error tearing down stream %d: %s (%d)", mCameraIdStr.string(), streamId,
                strerror(-err), err);
    }

    return res;
}

binder::Status CameraDeviceClient::finalizeOutputConfigurations(int32_t streamId,
        const hardware::camera2::params::OutputConfiguration &outputConfiguration) {
    ATRACE_CALL();

    binder::Status res;
    if (!(res = checkPidStatus(__FUNCTION__)).isOk()) return res;

    Mutex::Autolock icl(mBinderSerializationLock);

    const std::vector<sp<IGraphicBufferProducer> >& bufferProducers =
            outputConfiguration.getGraphicBufferProducers();

    if (bufferProducers.size() == 0) {
        ALOGE("%s: bufferProducers must not be empty", __FUNCTION__);
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, "Target Surface is invalid");
    }

    // streamId should be in mStreamMap if this stream already has a surface attached
    // to it. Otherwise, it should be in mDeferredStreams.
    bool streamIdConfigured = false;
    ssize_t deferredStreamIndex = NAME_NOT_FOUND;
    for (size_t i = 0; i < mStreamMap.size(); i++) {
        if (mStreamMap.valueAt(i).streamId() == streamId) {
            streamIdConfigured = true;
            break;
        }
    }
    for (size_t i = 0; i < mDeferredStreams.size(); i++) {
        if (streamId == mDeferredStreams[i]) {
            deferredStreamIndex = i;
            break;
        }

    }
    if (deferredStreamIndex == NAME_NOT_FOUND && !streamIdConfigured) {
        String8 msg = String8::format("Camera %s: deferred surface is set to a unknown stream"
                "(ID %d)", mCameraIdStr.string(), streamId);
        ALOGW("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }

    if (mStreamInfoMap[streamId].finalized) {
        String8 msg = String8::format("Camera %s: finalizeOutputConfigurations has been called"
                " on stream ID %d", mCameraIdStr.string(), streamId);
        ALOGW("%s: %s", __FUNCTION__, msg.string());
        return STATUS_ERROR(CameraService::ERROR_ILLEGAL_ARGUMENT, msg.string());
    }

    if (!mDevice.get()) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED, "Camera device no longer alive");
    }

    std::vector<sp<Surface>> consumerSurfaces;
    for (auto& bufferProducer : bufferProducers) {
        // Don't create multiple streams for the same target surface
        ssize_t index = mStreamMap.indexOfKey(IInterface::asBinder(bufferProducer));
        if (index != NAME_NOT_FOUND) {
            ALOGV("Camera %s: Surface already has a stream created "
                    " for it (ID %zd)", mCameraIdStr.string(), index);
            continue;
        }

        sp<Surface> surface;
        res = createSurfaceFromGbp(mStreamInfoMap[streamId], true /*isStreamInfoValid*/,
                surface, bufferProducer);

        if (!res.isOk())
            return res;

        consumerSurfaces.push_back(surface);
    }

    // Gracefully handle case where finalizeOutputConfigurations is called
    // without any new surface.
    if (consumerSurfaces.size() == 0) {
        mStreamInfoMap[streamId].finalized = true;
        return res;
    }

    // Finish the deferred stream configuration with the surface.
    status_t err;
    std::vector<int> consumerSurfaceIds;
    err = mDevice->setConsumerSurfaces(streamId, consumerSurfaces, &consumerSurfaceIds);
    if (err == OK) {
        for (size_t i = 0; i < consumerSurfaces.size(); i++) {
            sp<IBinder> binder = IInterface::asBinder(
                    consumerSurfaces[i]->getIGraphicBufferProducer());
            ALOGV("%s: mStreamMap add binder %p streamId %d, surfaceId %d", __FUNCTION__,
                    binder.get(), streamId, consumerSurfaceIds[i]);
            mStreamMap.add(binder, StreamSurfaceId(streamId, consumerSurfaceIds[i]));
        }
        if (deferredStreamIndex != NAME_NOT_FOUND) {
            mDeferredStreams.removeItemsAt(deferredStreamIndex);
        }
        mStreamInfoMap[streamId].finalized = true;
        mConfiguredOutputs.replaceValueFor(streamId, outputConfiguration);
    } else if (err == NO_INIT) {
        res = STATUS_ERROR_FMT(CameraService::ERROR_ILLEGAL_ARGUMENT,
                "Camera %s: Deferred surface is invalid: %s (%d)",
                mCameraIdStr.string(), strerror(-err), err);
    } else {
        res = STATUS_ERROR_FMT(CameraService::ERROR_INVALID_OPERATION,
                "Camera %s: Error setting output stream deferred surface: %s (%d)",
                mCameraIdStr.string(), strerror(-err), err);
    }

    return res;
}

status_t CameraDeviceClient::dump(int fd, const Vector<String16>& args) {
    return BasicClient::dump(fd, args);
}

status_t CameraDeviceClient::dumpClient(int fd, const Vector<String16>& args) {
    dprintf(fd, "  CameraDeviceClient[%s] (%p) dump:\n",
            mCameraIdStr.string(),
            (getRemoteCallback() != NULL ?
                    IInterface::asBinder(getRemoteCallback()).get() : NULL) );
    dprintf(fd, "    Current client UID %u\n", mClientUid);

    dprintf(fd, "    State:\n");
    dprintf(fd, "      Request ID counter: %d\n", mRequestIdCounter);
    if (mInputStream.configured) {
        dprintf(fd, "      Current input stream ID: %d\n", mInputStream.id);
    } else {
        dprintf(fd, "      No input stream configured.\n");
    }
    if (!mStreamMap.isEmpty()) {
        dprintf(fd, "      Current output stream/surface IDs:\n");
        for (size_t i = 0; i < mStreamMap.size(); i++) {
            dprintf(fd, "        Stream %d Surface %d\n",
                                mStreamMap.valueAt(i).streamId(),
                                mStreamMap.valueAt(i).surfaceId());
        }
    } else if (!mDeferredStreams.isEmpty()) {
        dprintf(fd, "      Current deferred surface output stream IDs:\n");
        for (auto& streamId : mDeferredStreams) {
            dprintf(fd, "        Stream %d\n", streamId);
        }
    } else {
        dprintf(fd, "      No output streams configured.\n");
    }
    // TODO: print dynamic/request section from most recent requests
    mFrameProcessor->dump(fd, args);

    return dumpDevice(fd, args);
}

void CameraDeviceClient::notifyError(int32_t errorCode,
                                     const CaptureResultExtras& resultExtras) {
    // Thread safe. Don't bother locking.
    sp<hardware::camera2::ICameraDeviceCallbacks> remoteCb = getRemoteCallback();

    if (remoteCb != 0) {
        remoteCb->onDeviceError(errorCode, resultExtras);
    }
}

void CameraDeviceClient::notifyRepeatingRequestError(long lastFrameNumber) {
    sp<hardware::camera2::ICameraDeviceCallbacks> remoteCb = getRemoteCallback();

    if (remoteCb != 0) {
        remoteCb->onRepeatingRequestError(lastFrameNumber, mStreamingRequestId);
    }

    Mutex::Autolock idLock(mStreamingRequestIdLock);
    mStreamingRequestId = REQUEST_ID_NONE;
}

void CameraDeviceClient::notifyIdle() {
    // Thread safe. Don't bother locking.
    sp<hardware::camera2::ICameraDeviceCallbacks> remoteCb = getRemoteCallback();

    if (remoteCb != 0) {
        remoteCb->onDeviceIdle();
    }
    Camera2ClientBase::notifyIdle();
}

void CameraDeviceClient::notifyShutter(const CaptureResultExtras& resultExtras,
        nsecs_t timestamp) {
    // Thread safe. Don't bother locking.
    sp<hardware::camera2::ICameraDeviceCallbacks> remoteCb = getRemoteCallback();
    if (remoteCb != 0) {
        remoteCb->onCaptureStarted(resultExtras, timestamp);
    }
    Camera2ClientBase::notifyShutter(resultExtras, timestamp);
}

void CameraDeviceClient::notifyPrepared(int streamId) {
    // Thread safe. Don't bother locking.
    sp<hardware::camera2::ICameraDeviceCallbacks> remoteCb = getRemoteCallback();
    if (remoteCb != 0) {
        remoteCb->onPrepared(streamId);
    }
}

void CameraDeviceClient::notifyRequestQueueEmpty() {
    // Thread safe. Don't bother locking.
    sp<hardware::camera2::ICameraDeviceCallbacks> remoteCb = getRemoteCallback();
    if (remoteCb != 0) {
        remoteCb->onRequestQueueEmpty();
    }
}

void CameraDeviceClient::detachDevice() {
    if (mDevice == 0) return;

    ALOGV("Camera %s: Stopping processors", mCameraIdStr.string());

    mFrameProcessor->removeListener(FRAME_PROCESSOR_LISTENER_MIN_ID,
                                    FRAME_PROCESSOR_LISTENER_MAX_ID,
                                    /*listener*/this);
    mFrameProcessor->requestExit();
    ALOGV("Camera %s: Waiting for threads", mCameraIdStr.string());
    mFrameProcessor->join();
    ALOGV("Camera %s: Disconnecting device", mCameraIdStr.string());

    // WORKAROUND: HAL refuses to disconnect while there's streams in flight
    {
        mDevice->clearStreamingRequest();

        status_t code;
        if ((code = mDevice->waitUntilDrained()) != OK) {
            ALOGE("%s: waitUntilDrained failed with code 0x%x", __FUNCTION__,
                  code);
        }
    }

    Camera2ClientBase::detachDevice();
}

/** Device-related methods */
void CameraDeviceClient::onResultAvailable(const CaptureResult& result) {
    ATRACE_CALL();
    ALOGV("%s", __FUNCTION__);

    // Thread-safe. No lock necessary.
    sp<hardware::camera2::ICameraDeviceCallbacks> remoteCb = mRemoteCallback;
    if (remoteCb != NULL) {
        remoteCb->onResultReceived(result.mMetadata, result.mResultExtras,
                result.mPhysicalMetadatas);
    }
}

binder::Status CameraDeviceClient::checkPidStatus(const char* checkLocation) {
    if (mDisconnected) {
        return STATUS_ERROR(CameraService::ERROR_DISCONNECTED,
                "The camera device has been disconnected");
    }
    status_t res = checkPid(checkLocation);
    return (res == OK) ? binder::Status::ok() :
            STATUS_ERROR(CameraService::ERROR_PERMISSION_DENIED,
                    "Attempt to use camera from a different process than original client");
}

// TODO: move to Camera2ClientBase
bool CameraDeviceClient::enforceRequestPermissions(CameraMetadata& metadata) {

    const int pid = IPCThreadState::self()->getCallingPid();
    const int selfPid = getpid();
    camera_metadata_entry_t entry;

    /**
     * Mixin default important security values
     * - android.led.transmit = defaulted ON
     */
    CameraMetadata staticInfo = mDevice->info();
    entry = staticInfo.find(ANDROID_LED_AVAILABLE_LEDS);
    for(size_t i = 0; i < entry.count; ++i) {
        uint8_t led = entry.data.u8[i];

        switch(led) {
            case ANDROID_LED_AVAILABLE_LEDS_TRANSMIT: {
                uint8_t transmitDefault = ANDROID_LED_TRANSMIT_ON;
                if (!metadata.exists(ANDROID_LED_TRANSMIT)) {
                    metadata.update(ANDROID_LED_TRANSMIT,
                                    &transmitDefault, 1);
                }
                break;
            }
        }
    }

    // We can do anything!
    if (pid == selfPid) {
        return true;
    }

    /**
     * Permission check special fields in the request
     * - android.led.transmit = android.permission.CAMERA_DISABLE_TRANSMIT
     */
    entry = metadata.find(ANDROID_LED_TRANSMIT);
    if (entry.count > 0 && entry.data.u8[0] != ANDROID_LED_TRANSMIT_ON) {
        String16 permissionString =
            String16("android.permission.CAMERA_DISABLE_TRANSMIT_LED");
        if (!checkCallingPermission(permissionString)) {
            const int uid = IPCThreadState::self()->getCallingUid();
            ALOGE("Permission Denial: "
                  "can't disable transmit LED pid=%d, uid=%d", pid, uid);
            return false;
        }
    }

    return true;
}

status_t CameraDeviceClient::getRotationTransformLocked(int32_t* transform) {
    ALOGV("%s: begin", __FUNCTION__);

    const CameraMetadata& staticInfo = mDevice->info();
    return CameraUtils::getRotationTransform(staticInfo, transform);
}

} // namespace android