C++ Parcel::readUint32方法代码示例

status_t DisplayState::read(const Parcel& input) {
    token = input.readStrongBinder();
    surface = interface_cast<IGraphicBufferProducer>(input.readStrongBinder());
    what = input.readUint32();
    layerStack = input.readUint32();
    orientation = input.readUint32();
    input.read(viewport);
    input.read(frame);
    width = input.readUint32();
    height = input.readUint32();
    return NO_ERROR;
}

static void readFromParcel(const Parcel &data, Vector<T> *items) {
    size_t size = (size_t)data.readUint32();
    for (size_t i = 0; i < size && data.dataAvail() > 0; i++) {
        T item;
        item.readFromParcel(data);
        items->add(item);
    }
}

status_t BnGraphicBufferAlloc::onTransact(
    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
    // codes that don't require permission check

    // BufferReference just keeps a strong reference to a GraphicBuffer until it
    // is destroyed (that is, until no local or remote process have a reference
    // to it).
    class BufferReference : public BBinder {
        sp<GraphicBuffer> mBuffer;
    public:
        BufferReference(const sp<GraphicBuffer>& buffer) : mBuffer(buffer) {}
    };


    switch (code) {
        case CREATE_GRAPHIC_BUFFER: {
            CHECK_INTERFACE(IGraphicBufferAlloc, data, reply);
            uint32_t width = data.readUint32();
            uint32_t height = data.readUint32();
            PixelFormat format = static_cast<PixelFormat>(data.readInt32());
            uint32_t usage = data.readUint32();
            status_t error;
            sp<GraphicBuffer> result =
                    createGraphicBuffer(width, height, format, usage, &error);
            reply->writeInt32(error);
            if (result != 0) {
                reply->write(*result);
                // We add a BufferReference to this parcel to make sure the
                // buffer stays alive until the GraphicBuffer object on
                // the other side has been created.
                // This is needed so that the buffer handle can be
                // registered before the buffer is destroyed on implementations
                // that do not use file-descriptors to track their buffers.
                reply->writeStrongBinder( new BufferReference(result) );
            }
            return NO_ERROR;
        }
        default:
            return BBinder::onTransact(code, data, reply, flags);
    }
}

status_t BnCameraRecordingProxyListener::onTransact(
    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
    switch(code) {
        case DATA_CALLBACK_TIMESTAMP: {
            ALOGV("DATA_CALLBACK_TIMESTAMP");
            CHECK_INTERFACE(ICameraRecordingProxyListener, data, reply);
            nsecs_t timestamp = data.readInt64();
            int32_t msgType = data.readInt32();
            sp<IMemory> imageData = interface_cast<IMemory>(data.readStrongBinder());
            dataCallbackTimestamp(timestamp, msgType, imageData);
            return NO_ERROR;
        } break;
        case RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP: {
            ALOGV("RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP");
            CHECK_INTERFACE(ICameraRecordingProxyListener, data, reply);
            nsecs_t timestamp;
            status_t res = data.readInt64(&timestamp);
            if (res != OK) {
                ALOGE("%s: Failed to read timestamp: %s (%d)", __FUNCTION__, strerror(-res), res);
                return BAD_VALUE;
            }

            native_handle_t* handle = data.readNativeHandle();
            if (handle == nullptr) {
                ALOGE("%s: Received a null native handle", __FUNCTION__);
                return BAD_VALUE;
            }
            // The native handle will be freed in
            // BpCameraRecordingProxy::releaseRecordingFrameHandle.
            recordingFrameHandleCallbackTimestamp(timestamp, handle);
            return NO_ERROR;
        } break;
        case RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP_BATCH: {
            ALOGV("RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP_BATCH");
            CHECK_INTERFACE(ICameraRecordingProxyListener, data, reply);
            uint32_t n = 0;
            status_t res = data.readUint32(&n);
            if (res != OK) {
                ALOGE("%s: Failed to read batch size: %s (%d)", __FUNCTION__, strerror(-res), res);
                return BAD_VALUE;
            }
            std::vector<nsecs_t> timestamps;
            std::vector<native_handle_t*> handles;
            timestamps.reserve(n);
            handles.reserve(n);
            for (uint32_t i = 0; i < n; i++) {
                nsecs_t t;
                res = data.readInt64(&t);
                if (res != OK) {
                    ALOGE("%s: Failed to read timestamp[%d]: %s (%d)",
                            __FUNCTION__, i, strerror(-res), res);
                    return BAD_VALUE;
                }
                timestamps.push_back(t);
            }
            for (uint32_t i = 0; i < n; i++) {
                native_handle_t* handle = data.readNativeHandle();
                if (handle == nullptr) {
                    ALOGE("%s: Received a null native handle at handles[%d]",
                            __FUNCTION__, i);
                    return BAD_VALUE;
                }
                handles.push_back(handle);
            }
            // The native handle will be freed in
            // BpCameraRecordingProxy::releaseRecordingFrameHandleBatch.
            recordingFrameHandleCallbackTimestampBatch(timestamps, handles);
            return NO_ERROR;
        } break;
        default:
            return BBinder::onTransact(code, data, reply, flags);
    }
}

status_t BnGraphicBufferConsumer::onTransact(
        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
    switch(code) {
        case ACQUIRE_BUFFER: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            BufferItem item;
            int64_t presentWhen = data.readInt64();
            uint64_t maxFrameNumber = data.readUint64();
            status_t result = acquireBuffer(&item, presentWhen, maxFrameNumber);
            status_t err = reply->write(item);
            if (err) return err;
            reply->writeInt32(result);
            return NO_ERROR;
        }
        case DETACH_BUFFER: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            int slot = data.readInt32();
            int result = detachBuffer(slot);
            reply->writeInt32(result);
            return NO_ERROR;
        }
        case ATTACH_BUFFER: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            sp<GraphicBuffer> buffer = new GraphicBuffer();
            data.read(*buffer.get());
            int slot = -1;
            int result = attachBuffer(&slot, buffer);
            reply->writeInt32(slot);
            reply->writeInt32(result);
            return NO_ERROR;
        }
        case RELEASE_BUFFER: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            int buf = data.readInt32();
            uint64_t frameNumber = static_cast<uint64_t>(data.readInt64());
            sp<Fence> releaseFence = new Fence();
            status_t err = data.read(*releaseFence);
            if (err) return err;
            status_t result = releaseBuffer(buf, frameNumber,
                    EGL_NO_DISPLAY, EGL_NO_SYNC_KHR, releaseFence);
            reply->writeInt32(result);
            return NO_ERROR;
        }
        case CONSUMER_CONNECT: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            sp<IConsumerListener> consumer = IConsumerListener::asInterface( data.readStrongBinder() );
            bool controlledByApp = data.readInt32();
            status_t result = consumerConnect(consumer, controlledByApp);
            reply->writeInt32(result);
            return NO_ERROR;
        }
        case CONSUMER_DISCONNECT: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            status_t result = consumerDisconnect();
            reply->writeInt32(result);
            return NO_ERROR;
        }
        case GET_RELEASED_BUFFERS: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            uint64_t slotMask = 0;
            status_t result = getReleasedBuffers(&slotMask);
            reply->writeInt64(static_cast<int64_t>(slotMask));
            reply->writeInt32(result);
            return NO_ERROR;
        }
        case SET_DEFAULT_BUFFER_SIZE: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            uint32_t width = data.readUint32();
            uint32_t height = data.readUint32();
            status_t result = setDefaultBufferSize(width, height);
            reply->writeInt32(result);
            return NO_ERROR;
        }
        case SET_MAX_BUFFER_COUNT: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            int bufferCount = data.readInt32();
            status_t result = setMaxBufferCount(bufferCount);
            reply->writeInt32(result);
            return NO_ERROR;
        }
        case SET_MAX_ACQUIRED_BUFFER_COUNT: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            int maxAcquiredBuffers = data.readInt32();
            status_t result = setMaxAcquiredBufferCount(maxAcquiredBuffers);
            reply->writeInt32(result);
            return NO_ERROR;
        }
        case SET_CONSUMER_NAME: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            setConsumerName( data.readString8() );
            return NO_ERROR;
        }
        case SET_DEFAULT_BUFFER_FORMAT: {
            CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
            PixelFormat defaultFormat = static_cast<PixelFormat>(data.readInt32());
            status_t result = setDefaultBufferFormat(defaultFormat);
            reply->writeInt32(result);
            return NO_ERROR;
        }
//.........这里部分代码省略.........