{"id":1118,"date":"2019-03-04T21:09:13","date_gmt":"2019-03-04T12:09:13","guid":{"rendered":"https:\/\/www.charlezz.com\/?p=1118"},"modified":"2020-01-30T10:52:00","modified_gmt":"2020-01-30T01:52:00","slug":"camera2-basic-%ec%86%8c%ec%8a%a4-%ec%82%b4%ed%8e%b4%eb%b3%b4%ea%b8%b0","status":"publish","type":"post","link":"https:\/\/charlezz.com\/?p=1118","title":{"rendered":"Camera2 Basic \uc18c\uc2a4 \uc0b4\ud3b4\ubcf4\uae30"},"content":{"rendered":"

 <\/p>\n

\uce74\uba54\ub77c<\/h1>\n

Android\uc758 \uce74\uba54\ub77c HAL (Hardware Abstraction Layer)\uc740 Camera 2\uc758 \uc0c1\uc704 \uc218\uc900\uc758 \uce74\uba54\ub77c \ud504\ub808\uc784 \uc6cc\ud06c API\ub97c \uae30\ubcf8 \uce74\uba54\ub77c \ub4dc\ub77c\uc774\ubc84 \ubc0f \ud558\ub4dc\uc6e8\uc5b4\uc5d0 \uc5f0\uacb0\ud569\ub2c8\ub2e4. \uce74\uba54\ub77c \uc11c\ube0c \uc2dc\uc2a4\ud15c\uc740 \uce74\uba54\ub77c \ud30c\uc774\ud504 \ub77c\uc778 \uad6c\uc131 \uc694\uc18c\uc5d0 \ub300\ud55c \uad6c\ud604\uc744 \ud3ec\ud568\ud558\ub294 \ubc18\uba74 \uce74\uba54\ub77c HAL\uc740 \uc774\ub7ec\ud55c \uad6c\uc131 \uc694\uc18c\uc758 \ubc84\uc804\uc744 \uad6c\ud604\ud558\ub294 \ub370 \uc0ac\uc6a9\ud560 \uc778\ud130\ud398\uc774\uc2a4\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n

\uad6c\uc870<\/h1>\n

\ub2e4\uc74c \uadf8\ub9bc\uacfc \ubaa9\ub85d\uc740 HAL \uad6c\uc131 \uc694\uc18c\ub97c \uc124\uba85\ud569\ub2c8\ub2e4.<\/p>\n

\"Android<\/p>\n

Application Framework<\/h2>\n

Application Framework \uacc4\uce35\uc5d0\uc11c\ub294 Camera2<\/a> API\ub97c \uc0ac\uc6a9\ud558\uc5ec \uce74\uba54\ub77c \ud558\ub4dc\uc6e8\uc5b4\uc640 \uc0c1\ud638 \uc791\uc6a9\ud558\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \ucf54\ub4dc\uac00 \uc788\uc2b5\ub2c8\ub2e4. \ub0b4\ubd80\uc801\uc73c\ub85c \uc774 \ucf54\ub4dc\ub294 \ud574\ub2f9 \ubc14\uc778\ub354<\/a> \uc778\ud130\ud398\uc774\uc2a4\ub97c \ud638\ucd9c\ud558\uc5ec \uce74\uba54\ub77c\uc640 \uc0c1\ud638 \uc791\uc6a9\ud558\ub294 \ub124\uc774\ud2f0\ube0c \ucf54\ub4dc\uc5d0 \uc561\uc138\uc2a4\ud569\ub2c8\ub2e4.<\/p>\n

AIDL<\/h2>\n

CameraService\uc640 \uad00\ub828\ub41c \ubc14\uc778\ub354 \uc778\ud130\ud398\uc774\uc2a4\ub294 frameworks \/ av \/ camera \/ aidl \/ android \/ hardware<\/a>\uc5d0\uc11c \ucc3e\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc0dd\uc131 \ub41c \ucf54\ub4dc\ub294 \ud558\uc704 \uacc4\uce35\uc758 \ub124\uc774\ud2f0\ube0c \ucf54\ub4dc\ub97c \ud638\ucd9c\ud558\uc5ec \uc2e4\uc81c \uce74\uba54\ub77c\uc5d0 \uc561\uc138\uc2a4\ud558\uace0 \ud504\ub808\uc784 \uc6cc\ud06c \uacc4\uce35\uc5d0\uc11c CameraDevice<\/a> \ubc0f CameraCaptureSession<\/a> \uac1d\uccb4\ub97c \ub9cc\ub4dc\ub294 \ub370 \uc0ac\uc6a9\ub418\ub294 \ub370\uc774\ud130\ub97c \ubc18\ud658\ud569\ub2c8\ub2e4.<\/p>\n

Native Framework<\/h2>\n

frameworks \/ av \/\uc5d0 \uc788\ub294 \uc774 \ud504\ub808\uc784\uc6cc\ud06c\ub294 CameraDevice<\/a> \ubc0f CameraCaptureSession<\/a> \ud074\ub798\uc2a4\uc640 \ub3d9\ub4f1\ud55c \uace0\uc720\ud55c \uae30\ub2a5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. NDK Camera2<\/a>\ub3c4 \ud655\uc778\ud574\ubcf4\uc138\uc694.<\/p>\n

Binder IPC interface<\/span><\/h2>\n

IPC \ubc14\uc778\ub354 \uc778\ud130\ud398\uc774\uc2a4\ub294 \ud504\ub85c\uc138\uc2a4\uac04 \ud1b5\uc2e0\uc744 \uc6a9\uc774\ud558\uac8c\ud569\ub2c8\ub2e4. \uce74\uba54\ub77c \uc11c\ube44\uc2a4\ub97c \ud638\ucd9c\ud558\ub294 framework \/ av \/ camera \/ camera \/ aidl \/ android \/ hardware \ub514\ub809\ud1a0\ub9ac\uc5d0 \uc5ec\ub7ec \uce74\uba54\ub77c \ubc14\uc778\ub354 \ud074\ub798\uc2a4\uac00 \uc788\uc2b5\ub2c8\ub2e4. ICameraService<\/a>\ub294 \uce74\uba54\ub77c \uc11c\ube44\uc2a4\uc5d0 \ub300\ud55c \uc778\ud130\ud398\uc774\uc2a4\uc785\ub2c8\ub2e4. ICameraDeviceUser<\/a>\ub294 \ud2b9\uc815 \uc5f4\ub9b0 \uce74\uba54\ub77c \uc7a5\uce58\uc5d0 \ub300\ud55c \uc778\ud130\ud398\uc774\uc2a4\uc785\ub2c8\ub2e4. ICameraServiceListener<\/a> \ubc0f ICameraDeviceCallbacks<\/a>\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ud504\ub808\uc784 \uc6cc\ud06c\uc5d0 \ub300\ud55c \uac01\uac01\uc758 CameraService \ubc0f CameraDevice \ucf5c\ubc31\uc785\ub2c8\ub2e4.<\/p>\n

Camera service<\/h2>\n

frameworks \/ av \/ services \/ camera \/ libcameraservice \/ CameraService.cpp\uc5d0\uc788\ub294 \uce74\uba54\ub77c \uc11c\ube44\uc2a4\ub294 HAL\uacfc \uc0c1\ud638 \uc791\uc6a9\ud558\ub294 \uc2e4\uc81c \ucf54\ub4dc\uc785\ub2c8\ub2e4.<\/p>\n

HAL<\/h2>\n

\ud558\ub4dc\uc6e8\uc5b4 \ucd94\uc0c1\ud654 \ub808\uc774\uc5b4\ub294 \uce74\uba54\ub77c \uc11c\ube44\uc2a4\uac00 \ud638\ucd9c\ud558\ub294 \ud45c\uc900 \uc778\ud130\ud398\uc774\uc2a4\ub97c \uc815\uc758\ud558\uba70 \uce74\uba54\ub77c \ud558\ub4dc\uc6e8\uc5b4\uac00 \uc62c\ubc14\ub974\uac8c \uc791\ub3d9\ud558\ub3c4\ub85d \uad6c\ud604\ud574\uc57c\ud569\ub2c8\ub2e4.<\/p>\n

WorkFlow<\/h3>\n

\"\"<\/a><\/p>\n

Camera2\ub97c \uc0ac\uc6a9\ud558\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \uae30\ubcf8\uc801\uc778 \uc6cc\ud06c\ud50c\ub85c\uc6b0\uc785\ub2c8\ub2e4. Camera\uc640 \ube44\uad50\ud558\uba74 \ubcf5\uc7a1\ud558\uc9c0\ub9cc, \uadf8\ub807\uac8c \uc5b4\ub835\uc9c0\ub294 \uc54a\uc2b5\ub2c8\ub2e4. \uad6c\uae00 \uc0d8\ud50c \uc608\uc81c\uc640 \ud568\uaed8 \ucc28\uadfc\ucc28\uadfc \uc0b4\ud3b4\ubcf4\ub3c4\ub85d \ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n

Camera2 Basic \uc0b4\ud3b4\ubcf4\uae30<\/h1>\n

\uc18c\uc2a4:https:\/\/github.com\/googlesamples\/android-Camera2Basic<\/a><\/p>\n

\"\"<\/a><\/p>\n

Camera\uc640\ub294 \ub2ec\ub9ac Camera2\ub294 \uce74\uba54\ub77c\ub97c \uc5f4\uace0 \ud504\ub9ac\ubdf0\ub97c \uc5bb\uae30\uae4c\uc9c0 \ubaa8\ub4e0 \uc0c1\ud669\uc774 \ube44\ub3d9\uae30\uc801\uc73c\ub85c \ub3d9\uc791\ud558\uae30 \ub54c\ubb38\uc5d0 \ucf5c\ubc31\uc774 \ub9ce\uc2b5\ub2c8\ub2e4.<\/p>\n

@Override\r\npublic void onResume() {\r\n    super.onResume();\r\n    startBackgroundThread();\r\n    if (mTextureView.isAvailable()) {\r\n        openCamera(mTextureView.getWidth(), mTextureView.getHeight());\r\n    } else {\r\n        mTextureView.setSurfaceTextureListener(mSurfaceTextureListener);\r\n    }\r\n}<\/pre>\n
\uc561\ud2f0\ube44\ud2f0(\ud504\ub808\uadf8\uba3c\ud2b8)\uac00 \uc2e4\ud589\uc774 \ub418\uba74 onResume()\uc774 \ud638\ucd9c\ub429\ub2c8\ub2e4. \uce74\uba54\ub77c\uc640 \uad00\ub828\ub41c \uc791\uc5c5\uc740 UI\ub97c \uadf8\ub9ac\ub294 \uba54\uc778\uc4f0\ub808\ub4dc\ub97c \ubc29\ud574\ud574\uc9c0 \uc54a\uae30 \uc704\ud574 onResume\uc5d0\uc11c \uc0c8\ub85c\uc6b4 \uc4f0\ub808\ub4dc\uc640 \ud578\ub4e4\ub7ec\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. \ub610\ud55c Fragment\uc5d0 \ud3ec\ud568\ub41c TextureView \ub610\ud55c \uc778\ud50c\ub808\uc774\ud305\uacfc \ub3d9\uc2dc\uc5d0 \ucd08\uae30\ud654\uac00 \uc9c4\ud589\ub429\ub2c8\ub2e4.\u00a0<\/p>\n
\uc77c\ubc18\uc801\uc73c\ub85c \ucc98\uc74c \uc561\ud2f0\ube44\ud2f0\uac00 \uc2dc\uc791\ub418\uba74 \uc704\uc758 \uc870\uac74\ubb38\uc5d0\uc11c \ub450\ubc88\uc9f8\uc758 else\uc870\uac74\uc744 \ud0c0\uc9c0\ub9cc, \ub2e4\ub978 \uc561\ud2f0\ube44\ud2f0\uc758 \ud638\ucd9c\ub85c \uce74\uba54\ub77c \ub9ac\uc18c\uc2a4\uc640, \ud14d\uc2a4\uccd0\ubdf0\ub4e4\uc774 \uc7a0\uc2dc \ube44\ud65c\uc131\ud654 \ub418\uc5c8\ub2e4\uac00 \ub2e4\uc2dc \uc7ac\uac8c \ub418\ub294\uacbd\uc6b0\uc5d0\ub294 if\ubb38\uc548\uc758 openCamera()\ub97c \ubc14\ub85c \ud638\ucd9c\ud558\uac8c \ub429\ub2c8\ub2e4.\u00a0<\/p>\n
private final TextureView.SurfaceTextureListener mSurfaceTextureListener\r\n        = new TextureView.SurfaceTextureListener() {\r\n...\r\n    @Override\r\n    public void onSurfaceTextureAvailable(SurfaceTexture texture, int width, int height) {\r\n        openCamera(width, height);\r\n    }\r\n...\r\n};<\/pre>\n
\ucc98\uc74c \uc561\ud2f0\ube44\ud2f0\uac00 \uc2e4\ud589\ub418\uc5c8\ub2e4 \uac00\uc815\ud558\uba74, \ub2e4\uc74c\uacfc \uac19\uc774 TextureView\uac00 \ucd08\uae30\ud654\uac00 \uc644\ub8cc\ub418\uace0 \ud654\uba74\uc5d0 \ud14d\uc2a4\uccd0\ub97c \uadf8\ub9b4\uc900\ube44\uac00 \ub418\uc5c8\uc744\ub54c onSurfaceTextureAvailable()\uc744 \ud638\ucd9c\ud558\uac8c \ub429\ub2c8\ub2e4.\u00a0<\/p>\n
private void openCamera(int width, int height) {\r\n    if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.CAMERA)\r\n            != PackageManager.PERMISSION_GRANTED) {\r\n        requestCameraPermission();\r\n        return;\r\n    }\r\n    setUpCameraOutputs(width, height);\r\n    configureTransform(width, height);\r\n    Activity activity = getActivity();\r\n    CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE);\r\n    try {\r\n        if (!mCameraOpenCloseLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) {\r\n            throw new RuntimeException(\"Time out waiting to lock camera opening.\");\r\n        }\r\n        manager.openCamera(mCameraId, mStateCallback, mBackgroundHandler);\r\n    } catch (CameraAccessException e) {\r\n        e.printStackTrace();\r\n    } catch (InterruptedException e) {\r\n        throw new RuntimeException(\"Interrupted while trying to lock camera opening.\", e);\r\n    }\r\n}<\/pre>\n
openCamera()\ub97c \uc0b4\ud3b4\ubcf4\uba74 TextureView\uc758 \uc0ac\uc774\uc988\ub97c \uc785\ub825\ubc1b\uc544 \uc5ec\ub7ec\uac00\uc9c0\uc791\uc5c5\ub4e4\uc744 \uc218\ud589\ud558\uac8c \ub429\ub2c8\ub2e4.\u00a0
\n\uccab\ubc88\uc9f8\ub85c \uce74\uba54\ub77c \ub7f0\ud0c0\uc784 \ud37c\ubbf8\uc158\uc774 \uc788\ub294\uc9c0 \ud655\uc778\ud558\uac8c \ub418\uace0, \ud37c\ubbf8\uc158\uc744 \uc5bb\uc5c8\ub2e4\uba74 setUpCameraOutputs()\ub97c \uc218\ud589\ud558\uac8c \ub429\ub2c8\ub2e4.\u00a0<\/p>\n
setUpCameraOutputs()\uac00 \ud558\ub294\uc77c<\/strong><\/p>\n