android是什么職場禮儀-電子人才網項目外包開發咨詢
  • 電子人才網|深圳MTK培訓|深圳FPGA培訓|深圳Symbian培訓logo位置
    首 頁 企業招聘 人才求職 培訓招生 高校招生 獵頭服務 高級人才 職場資訊 會員幫助 在線支付

    職場中最容易失業的白領     遞名片的商務禮儀     

    您當前位置: 電子人才網首頁 >> Symbian和FPGA培訓資料 HR資訊訂閱

    Symbian多媒體編程系列五 --攝像頭編程(上)

    Symbian培訓-攝像頭編程源代碼下載(SDK第二版)

    攝像頭編程
    一、要點
    1.CCamera類---提供操作攝像頭的各種API.
    調用CCamera::NewL()靜態函數創建一個攝像頭對象,函數原型:
    static CCamera::NewL(MCameraObserver& aObserver,TInt aCameraIndex);
    第一各參數時偵聽類對象,第二個時攝像頭設備的編號。
    創建了攝像頭對象后,應該調用它的Reserve()保留攝像頭。

    2.MCameraObserver---偵聽接口類
    class MCameraObserver
    {
    public:
    virtual void ReseverComplete(TInt aError)=0;
    virtual void PowerOnComplete(TInt aError)=0;
    virtual void ViewFinderFrameReady(CFbsBitmao& aFrame)=0;
    virtual void ImageReady(CFbsBitmao* aBitmap,HBufC8* aData,TInt aError)=0;

    }
    二、步驟
    1.創建和初始化
    (1)聲明observer
    class CImageCapturerEngine : public CBase, public MCameraObserver
    {
    public: // Observer interface
    class MObserver
    {
    public:
    virtual void OnFrame(const CFbsBitmap& aFrame)=0;
    virtual void OnImage(CFbsBitmap* aBitmap)=0;
    virtual void OnError(TInt aError)=0;
    };

    public: // Static constants
    static const TInt KDefaultImageWidth;
    static const TInt KDefaultImageHeight;
    static const CCamera::TFormat KDefaultImageFormat;
    static const TInt KDefaultImageIndex;

    public: // Constructors and destructor
    /**
    * Two-phased constructor.
    */
    static CImageCapturerEngine* NewL(MObserver& aObserver);

    /**
    * Destructor.
    */
    ~CImageCapturerEngine();

    private:
    /**
    * EPOC default constructor.
    */
    CImageCapturerEngine(MObserver& aObserver);
    void ConstructL();

    public: // Functions from MCameraObserver
    /**
    * Indicates camera reservation is complete.
    * Called asynchronously when CCamera::Reserve() completes.
    * @param aError: An error on failure and KErrNone on success
    */
    void ReserveComplete(TInt aError);

    /**
    * Indicates camera power on is complete.
    * Called on completion of CCamera:PowerOn().
    * @param aError: An error on failure and KErrNone on success
    */
    void PowerOnComplete(TInt aError);

    /**
    * Called periodically in response to the use of
    * CCamera::StartViewFinderBitmapsL().
    * @param aFrame: A view finder frame
    */
    void ViewFinderFrameReady(CFbsBitmap& aFrame);

    /**
    * Called asynchronously when CCamera::CaptureImage() completes.
    * Transfers the current image from the camera to the client.
    * @param aBitmap: An image held in CFbsBitmap form if this was the
    * format specified in CCamera::PrepareImageCaptureL().
    * @param aData: a pointer to an HBufC8 if this was the format
    * specified in CCamera::PrepareImageCaptureL().
    * @param aError KErrNone on success or an error code on failure
    */
    void ImageReady(CFbsBitmap* aBitmap,HBufC8* aData,TInt aError);

    /**
    * Called asynchronously when a buffer has been filled with the
    * required number of video frames by CCamera::StartVideoCapture().
    * Passes a filled frame buffer to the client.
    * @param aFrameBuffer: A pointer to an MFrameBuffer if successful, or
    * NULL if not successful.
    * @param aError: KErrNone on success or an error code on failure
    */
    void FrameBufferReady(MFrameBuffer* aFrameBuffer,TInt aError);

    public: // new public methods
    /**
    * Start the view finder
    */
    void StartViewFinderL();

    /**
    * Stop the view finder
    */
    void StopViewFinder();

    /**
    * Asynchronously performs still image capture.
    * Calls MCameraObserver::ImageReady() when complete.
    */
    void CaptureImage();

    private: // new private methods
    /**
    * Performs setup and allocation of memory.
    * Called prior to calling CaptureImage() to keep the latency of that
    * function to a minimum. Needs to be called only once for multiple
    * CaptureImage() calls.
    * May leave with KErrNotSupported or KErrNoMemory
    * @param aImageFormat: The image format, must be one of the formats
    * supported (see TCameraInfo::iImageFormatsSupported)
    */
    void PrepareImageCaptureL(CCamera::TFormat aImageFormat);

    private: // member variables
    /**
    *
    */
    MObserver& iObserver;

    /**
    * The camera object
    */
    CCamera* iCamera;

    /**
    * The resolution of the captured image.
    */
    TSize iSize;
    };

    #endif


    完整版本請見http://www.dance2love.com
    曙海教育
    曙海嵌入式
    (MTK培訓,Android培訓,FPGA培訓,DSP培訓,iPhone培訓,Symbian培訓)
    上?偛侩娫:021-51875830 深圳:4008699035 北京:010-51292078
    網址:http://www.51qianru.cn
    版權所有-曙海教育 轉發請注明出處
     

    相關資訊 更多資訊  
    ·職場中最容易失業的白領 (6-17)
    ·遞名片的商務禮儀 (10-16)

    發表評論
    (帶*號為必填項)
    登錄名:* Email:
    標 題:*
    內 容:*
    發表評論須知:
    一、所發文章必須遵守《互聯網電子公告服務管理規定》;
    二、嚴禁發布供求代理信息、公司介紹、產品信息等廣告宣傳信息;
    三、嚴禁對個人、實體、民族、國家等進行漫罵、污蔑、誹謗。

    最新資訊
    今日暫無資訊更新

    熱門資訊
    ·危險的試用期,你準備好了?
    ·[推薦]五大房產新政3月起實施
    ·從美女俊男案例看溝通
    ·國企、外企、民企之比較
    ·把握好你的職業生涯的每個階段
    ·職工醫保實際繳費年限有別
    ·員工薪酬 不患寡而患不均
    ·[推薦]吳邦國:將制定物權法勞動
    ·副總經理一夜成了操作工
    ·招聘實用政策解讀:檔案和保險問題
    ·連續工作滿10年可簽無固定期限勞
    ·用人單位未經協商不得擅自變換工種
    ·職場30萬年薪金領心路
    ·李嘉誠卸甲的理由
    ·為網羅人才 日本IT企業推出在家
    ·畢業生檔案轉遞這樣辦
    ·領導修煉:《中庸》的和諧共贏之道
    ·為即將畢業的海歸尋找歸途
    ·英語面試技巧 事先3項準備
    ·小心職業定位陷阱

    關于我們。服務條款。法律聲明。隱私聲明。廣告服務。友情連接。合作代理。聯系我們
    滬ICP備05001702號   Copyright 2003-2009 morning-sea.com.cn Inc All Rights Reserved.
    電話:021-51875830 Email:officeoffice@126.com webmaster@morning-sea.com.cn 在線客服QQ:849322415
    日本熟妇亲子交尾50路