Inherits RefBase.
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| virtual status_t | autoFocus ()=0 |
| | Start auto focus, the notification callback routine is called with CAMERA_MSG_FOCUS once when focusing is complete. More...
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| virtual status_t | cancelAutoFocus ()=0 |
| | Cancels auto-focus function. More...
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| virtual status_t | cancelPicture ()=0 |
| | Cancel a picture that was started with takePicture. More...
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| virtual void | disableMsgType (int32_t msgType)=0 |
| | Disable a message, or a set of messages. More...
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| virtual status_t | dump (int fd, const Vector< String16 > &args) const =0 |
| | Dump state of the camera hardware. More...
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| virtual void | enableMsgType (int32_t msgType)=0 |
| | The following three functions all take a msgtype, which is a bitmask of the messages defined in include/ui/Camera.h. More...
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| virtual CameraParameters | getParameters () const =0 |
| | Return the camera parameters. More...
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| virtual sp< IMemoryHeap > | getPreviewHeap () const =0 |
| | Return the IMemoryHeap for the preview image heap. More...
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| virtual sp< IMemoryHeap > | getRawHeap () const =0 |
| | Return the IMemoryHeap for the raw image heap. More...
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| virtual bool | msgTypeEnabled (int32_t msgType)=0 |
| | Query whether a message, or a set of messages, is enabled. More...
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| virtual bool | previewEnabled ()=0 |
| | Returns true if preview is enabled. More...
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| virtual bool | recordingEnabled ()=0 |
| | Returns true if recording is enabled. More...
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| virtual void | release ()=0 |
| | Release the hardware resources owned by this object. More...
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| virtual void | releaseRecordingFrame (const sp< IMemory > &mem)=0 |
| | Release a record frame previously returned by CAMERA_MSG_VIDEO_FRAME. More...
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| virtual status_t | sendCommand (int32_t cmd, int32_t arg1, int32_t arg2)=0 |
| | Send command to camera driver. More...
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| virtual void | setCallbacks (notify_callback notify_cb, data_callback data_cb, data_callback_timestamp data_cb_timestamp, void *user)=0 |
| | Set the notification and data callbacks. More...
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| virtual status_t | setOverlay (const sp< Overlay > &overlay) |
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| virtual status_t | setParameters (const CameraParameters ¶ms)=0 |
| | Set the camera parameters. More...
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| virtual status_t | startPreview ()=0 |
| | Start preview mode. More...
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| virtual status_t | startRecording ()=0 |
| | Start record mode. More...
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| virtual void | stopPreview ()=0 |
| | Stop a previously started preview. More...
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| virtual void | stopRecording ()=0 |
| | Stop a previously started recording. More...
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| virtual status_t | takePicture ()=0 |
| | Take a picture. More...
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| virtual bool | useOverlay () |
| | Only used if overlays are used for camera preview. More...
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| virtual | ~CameraHardwareInterface () |
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CameraHardwareInterface.h defines the interface to the camera hardware abstraction layer, used for setting and getting parameters, live previewing, and taking pictures.
It is a referenced counted interface with RefBase as its base class. CameraService calls openCameraHardware() to retrieve a strong pointer to the instance of this interface and may be called multiple times. The following steps describe a typical sequence:
- After CameraService calls openCameraHardware(), getParameters() and setParameters() are used to initialize the camera instance. CameraService calls getPreviewHeap() to establish access to the preview heap so it can be registered with SurfaceFlinger for efficient display updating while in preview mode.
- startPreview() is called. The camera instance then periodically sends the message CAMERA_MSG_PREVIEW_FRAME (if enabled) each time a new preview frame is available. If data callback code needs to use this memory after returning, it must copy the data.
Prior to taking a picture, CameraService calls autofocus(). When auto focusing has completed, the camera instance sends a CAMERA_MSG_FOCUS notification, which informs the application whether focusing was successful. The camera instance only sends this message once and it is up to the application to call autoFocus() again if refocusing is desired.
CameraService calls takePicture() to request the camera instance take a picture. At this point, if a shutter, postview, raw, and/or compressed callback is desired, the corresponding message must be enabled. As with CAMERA_MSG_PREVIEW_FRAME, any memory provided in a data callback must be copied if it's needed after returning.
Definition at line 75 of file CameraHardwareInterface.h.