Class ImageReader

camera/basic/src/main/cpp/image_reader.h:34–115

};

class ImageReader {
 public:
  /**
   * Ctor and Dtor()
   */
  explicit ImageReader(ImageFormat* res, enum AIMAGE_FORMATS format);

  ~ImageReader();

  /**
   * Report cached ANativeWindow, which was used to create camera's capture
   * session output.
   */
  ANativeWindow* GetNativeWindow(void);

  /**
   * Retrieve Image on the top of Reader's queue
   */
  AImage* GetNextImage(void);

  /**
   * Retrieve Image on the back of Reader's queue, dropping older images
   */
  AImage* GetLatestImage(void);

  /**
   * Delete Image
   * @param image {@link AImage} instance to be deleted
   */
  void DeleteImage(AImage* image);

  /**
   * AImageReader callback handler. Called by AImageReader when a frame is
   * captured
   * (Internal function, not to be called by clients)
   */
  void ImageCallback(AImageReader* reader);

  /**
   * DisplayImage()
   *   Present camera image to the given display buffer. Avaliable image is
   * converted
   *   to display buffer format. Supported display format:
   *      WINDOW_FORMAT_RGBX_8888
   *      WINDOW_FORMAT_RGBA_8888
   *   @param buf {@link ANativeWindow_Buffer} for image to display to.
   *   @param image a {@link AImage} instance, source of image conversion.
   *            it will be deleted via {@link AImage_delete}
   *   @return true on success, false on failure
   */
  bool DisplayImage(ANativeWindow_Buffer* buf, AImage* image);
  /**
   * Configure the rotation angle necessary to apply to
   * Camera image when presenting: all rotations should be accumulated:
   *    CameraSensorOrientation + Android Device Native Orientation +
   *    Human Rotation (rotated degree related to Phone native orientation
   */
  void SetPresentRotation(int32_t angle);