\u4ee5TI\u7684platform\u4e3a\u4f8b\u5b50\uff0c\u4e5f\u5c31\u662f\u8fd9\u4e24\u4e2a\u6587\u4ef6
\n\/path\/to\/aosp\/frameworks\/av\/services\/camera\/libcameraservice\/CameraHardwareInterface.h
\n\u548c
\n\/path\/to\/aosp\/hardware\/ti\/omap4xxx\/camera\/CameraHal.cpp
\n\u662f\u5982\u4f55\u5173\u8054\u7684\u3002<\/p>\n
\u8c01\u6765\u52a0\u8f7dcamera.$platform$.so\uff0c\u8fd9\u4e2a\u662f\u771f\u6b63\u7684HAL\u7684\u5b9e\u73b0\uff0c\u91cc\u9762\u5b9e\u9645\u6700\u7ec8\u4f1a\u53bb\u8c03\u7528Driver(\u4e2d\u95f4\u900f\u8fc7rpmsg-omx1)\u3002
\n\u597d\u7a81\u7136\uff0c\u53ef\u80fd\u4f60\u73b0\u5728\u8fd8\u4e0d\u77e5\u9053camera.$platform$.so\u662f\u4ec0\u4e48\uff1f\u662f\u8fd9\u6837\u7684\uff0c\u4f46\u662f\u5230\u4f60\u770b\u5230\u540e\u9762\u4f60\u5c31\u4f1a\u53d1\u73b0Vendor\u7684HAL\u5b9e\u73b0\u662f\u5305\u6210\u4e00\u4e2aso\u6863\u7684\uff0c\u4e5f\u5c31\u662f\u8fd9\u4e2a\u3002<\/p>\n
void CameraService::onFirstRef()\r\n{\r\n BnCameraService::onFirstRef();\r\n\r\n if (hw_get_module(CAMERA_HARDWARE_MODULE_ID,\r\n (const hw_module_t **)&mModule) < 0) {\r\n ALOGE("Could not load camera HAL module");\r\n mNumberOfCameras = 0;\r\n }\r\n else {\r\n mNumberOfCameras = mModule->get_number_of_cameras();\r\n if (mNumberOfCameras > MAX_CAMERAS) {\r\n ALOGE("Number of cameras(%d) > MAX_CAMERAS(%d).",\r\n mNumberOfCameras, MAX_CAMERAS);\r\n mNumberOfCameras = MAX_CAMERAS;\r\n }\r\n for (int i = 0; i < mNumberOfCameras; i++) {\r\n setCameraFree(i);\r\n }\r\n }\r\n}[\/code]\r\n\u5728\/path\/to\/aosp\/hardware\/libhardware\/hardware.c\u5f53\u4e2d\u6709\u4e0b\u9762\u8fd9\u4e9b\u65b9\u6cd5\r\n[code lang="java"]hw_get_module(const char *id, const struct hw_module_t **module) \/\/ \u8fd9\u91cc\u5b9a\u4e49\u7684\u662fhw_module_t\uff0c\u4f46\u662fVendor HAL\u5f53\u4e2d\u5b9e\u73b0\u7684\u662fcamera_module_t[\/code]\r\n\r\n[code lang="java"]\/* Loop through the configuration variants looking for a module *\/\r\nfor (i=0 ; i<HAL_VARIANT_KEYS_COUNT+1 ; i++) {\r\n if (i < HAL_VARIANT_KEYS_COUNT) {\r\n if (property_get(variant_keys[i], prop, NULL) == 0) {\r\n continue;\r\n }\r\n snprintf(path, sizeof(path), "%s\/%s.%s.so",\r\n HAL_LIBRARY_PATH2, name, prop);\r\n if (access(path, R_OK) == 0) break;\r\n\r\n snprintf(path, sizeof(path), "%s\/%s.%s.so",\r\n HAL_LIBRARY_PATH1, name, prop);\r\n if (access(path, R_OK) == 0) break;\r\n } else {\r\n snprintf(path, sizeof(path), "%s\/%s.default.so",\r\n HAL_LIBRARY_PATH1, name);\r\n if (access(path, R_OK) == 0) break;\r\n }\r\n}[\/code]\r\n\r\n[code lang="java"]static const char *variant_keys[] = {\r\n "ro.hardware", \/* This goes first so that it can pick up a different\r\n file on the emulator. *\/\r\n "ro.product.board",\r\n "ro.board.platform",\r\n "ro.arch"\r\n};\r\n\r\nstatic const int HAL_VARIANT_KEYS_COUNT =\r\n (sizeof(variant_keys)\/sizeof(variant_keys[0]));\r\n[\/code]\r\n\/path\/to\/aosp\/out\/target\/product\/panda\/system\/build.prop\r\n\u8fd9\u91cc\u9762\u6709platform\u6216\u8005arch\u76f8\u5173\u7684\u6570\u636e\r\n\r\n[code lang="java"]\/*\r\n * load the symbols resolving undefined symbols before\r\n * dlopen returns. Since RTLD_GLOBAL is not or'd in with\r\n * RTLD_NOW the external symbols will not be global\r\n *\/\r\nhandle = dlopen(path, RTLD_NOW);\r\n\r\n\/* Get the address of the struct hal_module_info. *\/\r\nconst char *sym = HAL_MODULE_INFO_SYM_AS_STR;\r\nhmi = (struct hw_module_t *)dlsym(handle, sym);\r\nif (hmi == NULL) {\r\n ALOGE("load: couldn't find symbol %s", sym);\r\n status = -EINVAL;\r\n goto done;\r\n}\r\n\r\n*pHmi = hmi; \/\/ \u52a8\u6001\u52a0\u8f7dVendor HAL\u4e4b\u540e\u8981\u8fd4\u56de\u8fd9\u4e2ahw_module_t\u7ed3\u6784\u4f53\u4f9bAndroid Service\/HAL\u5c42\u4f7f\u7528[\/code]\r\n\r\n\u8fd9\u4e2aload\u51fa\u6765\u7684HAL_MODULE_INFO_SYM_AS_STR\u662f\u4ec0\u4e48\uff1f\r\n\r\n\u5148\u770b\u5b83\u662f\u4ec0\u4e48\uff0c\u5b9a\u4e49\u4f4d\u4e8ehardware.h\u5f53\u4e2d\r\n[code lang="java"]\/**\r\n * Name of the hal_module_info\r\n *\/\r\n#define HAL_MODULE_INFO_SYM HMI\r\n\r\n\/**\r\n * Name of the hal_module_info as a string\r\n *\/\r\n#define HAL_MODULE_INFO_SYM_AS_STR "HMI"[\/code]\r\n\r\n\u7406\u8bba\u4e0a\u6765\u8bf4dlsym\u5c31\u662f\u4f1a\u53bbload\u4e00\u4e2a\u540d\u5b57\u4e3a"HMI"\u7684\u53d8\u91cf\/\u51fd\u6570\uff0c\u4e5f\u5c31\u662f\u8bf4\u5728Vendor HAL\u5f53\u4e2d\u5fc5\u7136\u6709\u540d\u5b57\u4e3a"HMI"\u7684\u8fd9\u6837\u4e00\u4e2a\u4e1c\u897f\u3002\r\n\u770b\u770bhw_module_t\u7684\u5b9a\u4e49\u3002\r\n[code lang="java"]\/**\r\n * Every hardware module must have a data structure named HAL_MODULE_INFO_SYM\r\n * and the fields of this data structure must begin with hw_module_t\r\n * followed by module specific information.\r\n *\/\r\ntypedef struct hw_module_t {\r\n \/** tag must be initialized to HARDWARE_MODULE_TAG *\/\r\n uint32_t tag;\r\n\r\n \/**\r\n * The API version of the implemented module. The module owner is\r\n * responsible for updating the version when a module interface has\r\n * changed.\r\n *\r\n * The derived modules such as gralloc and audio own and manage this field.\r\n * The module user must interpret the version field to decide whether or\r\n * not to inter-operate with the supplied module implementation.\r\n * For example, SurfaceFlinger is responsible for making sure that\r\n * it knows how to manage different versions of the gralloc-module API,\r\n * and AudioFlinger must know how to do the same for audio-module API.\r\n *\r\n * The module API version should include a major and a minor component.\r\n * For example, version 1.0 could be represented as 0x0100. This format\r\n * implies that versions 0x0100-0x01ff are all API-compatible.\r\n *\r\n * In the future, libhardware will expose a hw_get_module_version()\r\n * (or equivalent) function that will take minimum\/maximum supported\r\n * versions as arguments and would be able to reject modules with\r\n * versions outside of the supplied range.\r\n *\/\r\n uint16_t module_api_version;\r\n#define version_major module_api_version\r\n \/**\r\n * version_major\/version_minor defines are supplied here for temporary\r\n * source code compatibility. They will be removed in the next version.\r\n * ALL clients must convert to the new version format.\r\n *\/\r\n\r\n \/**\r\n * The API version of the HAL module interface. This is meant to\r\n * version the hw_module_t, hw_module_methods_t, and hw_device_t\r\n * structures and definitions.\r\n *\r\n * The HAL interface owns this field. Module users\/implementations\r\n * must NOT rely on this value for version information.\r\n *\r\n * Presently, 0 is the only valid value.\r\n *\/\r\n uint16_t hal_api_version;\r\n#define version_minor hal_api_version\r\n\r\n \/** Identifier of module *\/\r\n const char *id;\r\n\r\n \/** Name of this module *\/\r\n const char *name;\r\n\r\n \/** Author\/owner\/implementor of the module *\/\r\n const char *author;\r\n\r\n \/** Modules methods *\/\r\n struct hw_module_methods_t* methods;\r\n\r\n \/** module's dso *\/\r\n void* dso;\r\n\r\n \/** padding to 128 bytes, reserved for future use *\/\r\n uint32_t reserved[32-7];\r\n\r\n} hw_module_t;[\/code]\r\n\u5b9a\u4e49\u4f4d\u4e8ehardware.h\u5f53\u4e2d\r\n\r\n\r\n\u5bf9\u4e8eTI\u7684hardware\u6765\u8bb2\uff0cload\u7684\u5c31\u662fcamera.omap4.so(\u4e5f\u5c31\u662f\u524d\u9762\u6240\u8bf4\u7684camera.$platform$.so)\u7684\u540d\u5b57\u4e3aHMI\u7684\u7ed3\u6784\u4f53\u3002\r\n\u8fd9\u4e2a\u9700\u8981\u4ed4\u7ec6\u770b\u4e0b\u624d\u80fd\u53d1\u73b0HAL_MODULE_INFO_SYM\u5b9e\u9645\u5c31\u662fHMI\uff0chardware.h\u5f53\u4e2d\u5b9a\u4e49\u7684\u90a3\u4e2amacro\u3002\r\nHMI\u4f4d\u4e8e\r\n\/path\/to\/aosp\/hardware\/ti\/omap4xxx\/camera\/CameraHal_Module.cpp\r\n\u5f53\u4e2d\r\n[code lang="java"]camera_module_t HAL_MODULE_INFO_SYM = {\r\n common: {\r\n tag: HARDWARE_MODULE_TAG,\r\n version_major: 1,\r\n version_minor: 0,\r\n id: CAMERA_HARDWARE_MODULE_ID,\r\n name: "TI OMAP CameraHal Module",\r\n author: "TI",\r\n methods: &camera_module_methods,\r\n dso: NULL, \/* remove compilation warnings *\/\r\n reserved: {0}, \/* remove compilation warnings *\/\r\n },\r\n get_number_of_cameras: camera_get_number_of_cameras,\r\n get_camera_info: camera_get_camera_info,\r\n};[\/code]\r\n\u901a\u8fc7'arm-eabi-objdump' -t camera.omap4.so | grep 'HMI'\r\n\u4e5f\u53ef\u4ee5\u9a8c\u8bc1\u8fd9\u4e00\u70b9\r\n\r\n\u800c\u518d\u4ed4\u7ec6\u770b\u770b\u8fd9\u4e2acommon\u5b9e\u9645\u4e0a\u5c31\u662fhw_module_t\u8fd9\u4e2a\u7ed3\u6784\u4f53\uff0c\u8fd9\u4e5f\u5c31\u5370\u8bc1\u4e86\u524d\u9762hw_module_t\u5b9a\u4e49\u7684\u5730\u65b9\u6240\u8bf4\u7684\r\n<blockquote>\/**\r\n * Every hardware module must have a data structure named HAL_MODULE_INFO_SYM\r\n * and the fields of this data structure must begin with hw_module_t\r\n * followed by module specific information.\r\n *\/<\/blockquote>\r\n\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u662fhardware.h\u5f53\u4e2d\u5b9a\u4e49\u7684\u90fd\u662fhw_module_t\uff0c\u4f46\u662fVendor HAL\u5b9e\u73b0\u7684\u90fd\u662f\u81ea\u5df1\u7684xxx_module_t\uff0c\u6bd4\u5982\u65b9\u6cd5\u5b9a\u4e49\u7684\u7c7b\u578b\u548c\u5b9e\u9645\u7c7b\u578b\u4e0d\u4e00\u6837\uff0c\u8fd9\u4e2a\u80fd\u5de5\u4f5c\u6709\u4ec0\u4e48\u6837\u7684\u5965\u79d8\uff1f\r\n\u5176\u5b9e\u5c31\u662f\u6307\u9488\u7684\u7b2c\u4e00\u4e2a\u5730\u5740\uff0cVendor HAL\u5f53\u4e2d\u5b9a\u4e49\u7684\u7ed3\u6784\u5fc5\u987b\u8981\u6c42\u7b2c\u4e00\u4e2a\u57df\u662fhw_module_t\uff0c\u8fd9\u6837\u5730\u5740\u5c31\u53ef\u4ee5\u5bf9\u5e94\u8d77\u6765\u3002\r\n\u603b\u4e4bAndroid\u4f7f\u7528\u7684\u8fd9\u79cd\u6280\u6cd5\u9700\u8981\u7406\u89e3\uff0c\u8981\u4e0d\u7136\u90fd\u65e0\u6cd5\u77e5\u9053\u4ed6\u4eec\u4e4b\u95f4\u662f\u600e\u4e48\u4e32\u8d77\u6765\u7684\uff0c\u6307\u9488\u5f3a\u5927\uff0c\u4f46\u5c0f\u5fc3\u4f7f\u7528\uff0c\u5426\u5219\u4e5f\u53ef\u80fd\u4f24\u8eab\uff01\r\ncamera_device_t\u548chw_device_t\u4e5f\u662f\u4e00\u6837\u7684\u7528\u6cd5\uff01\r\n\r\n[code lang="java"]#define CAMERA_HARDWARE_MODULE_ID "camera"<\/pre>\n\u5b9a\u4e49\u4f4d\u4e8ecamera_common.h\u5f53\u4e2d<\/p>\n
\u5176\u4ed6\u4e00\u4e9b\u4f7f\u7528\u5230\u7684\u5b8f\u4e4b\u7c7b\u7684<\/p>\n
#ifndef _LINUX_LIMITS_H\r\n#define _LINUX_LIMITS_H\r\n#define NR_OPEN 1024\r\n#define NGROUPS_MAX 65536\r\n\/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS *\/\r\n#define ARG_MAX 131072\r\n#define CHILD_MAX 999\r\n#define OPEN_MAX 256\r\n#define LINK_MAX 127\r\n\/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS *\/\r\n#define MAX_CANON 255\r\n#define MAX_INPUT 255\r\n#define NAME_MAX 255\r\n#define PATH_MAX 4096\r\n\/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS *\/\r\n#define PIPE_BUF 4096\r\n#define XATTR_NAME_MAX 255\r\n#define XATTR_SIZE_MAX 65536\r\n#define XATTR_LIST_MAX 65536\r\n\/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS *\/\r\n#define RTSIG_MAX 32\r\n#endif\r\n<\/pre>\n\u5bf9\u4e8eCamera HAL\u6765\u8bf4\uff0c\u4f60\u9700\u8981\u627e\u5230<\/p>\n
typedef struct camera_device {\r\n \/**\r\n * camera_device.common.version must be in the range\r\n * HARDWARE_DEVICE_API_VERSION(0,0)-(1,FF). CAMERA_DEVICE_API_VERSION_1_0 is\r\n * recommended.\r\n *\/\r\n hw_device_t common;\r\n camera_device_ops_t *ops;\r\n void *priv;\r\n} camera_device_t;<\/pre>\n\u4f4d\u4e8ecamera.h\u5f53\u4e2d<\/p>\n
typedef struct camera_module {\r\n hw_module_t common;\r\n int (*get_number_of_cameras)(void);\r\n int (*get_camera_info)(int camera_id, struct camera_info *info);\r\n} camera_module_t;<\/pre>\n\u4f4d\u4e8ecamera_common.h\u5f53\u4e2d<\/p>\n
\u626b\u5e73\u8fd9\u4e9b\u969c\u788d\u4e4b\u540e\uff0c\u540e\u9762\u5c31\u4f1a\u987a\u5229\u591a\u4e86\u3002
\n\u6bd4\u5982takePicture\u8fd9\u4e2a\u52a8\u4f5c\uff0c\u5728CameraHal_Module\u5f53\u4e2d\u4f1a\u88ab\u4e8eCameraHal\u5173\u8054\u8d77\u6765\uff0c\u4e0a\u5c42\u8c03\u7528\u5c31\u4f1a\u8fdb\u5165\u5230CameraHal\u5f53\u4e2d\u5bf9\u5e94\u7684\u65b9\u6cd5<\/p>\n
status_t CameraHal::takePicture( )\r\n{\r\n status_t ret = NO_ERROR;\r\n CameraFrame frame;\r\n CameraAdapter::BuffersDescriptor desc;\r\n int burst;\r\n const char *valstr = NULL;\r\n unsigned int bufferCount = 1;\r\n\r\n Mutex::Autolock lock(mLock);\r\n\r\n#if PPM_INSTRUMENTATION || PPM_INSTRUMENTATION_ABS\r\n\r\n gettimeofday(&mStartCapture, NULL);\r\n\r\n#endif\r\n\r\n LOG_FUNCTION_NAME;\r\n\r\n if(!previewEnabled() && !mDisplayPaused)\r\n {\r\n LOG_FUNCTION_NAME_EXIT;\r\n CAMHAL_LOGEA("Preview not started...");\r\n return NO_INIT;\r\n }\r\n\r\n \/\/ return error if we are already capturing\r\n if ( (mCameraAdapter->getState() == CameraAdapter::CAPTURE_STATE &&\r\n mCameraAdapter->getNextState() != CameraAdapter::PREVIEW_STATE) ||\r\n (mCameraAdapter->getState() == CameraAdapter::VIDEO_CAPTURE_STATE &&\r\n mCameraAdapter->getNextState() != CameraAdapter::VIDEO_STATE) ) {\r\n CAMHAL_LOGEA("Already capturing an image...");\r\n return NO_INIT;\r\n }\r\n\r\n \/\/ we only support video snapshot if we are in video mode (recording hint is set)\r\n valstr = mParameters.get(TICameraParameters::KEY_CAP_MODE);\r\n if ( (mCameraAdapter->getState() == CameraAdapter::VIDEO_STATE) &&\r\n (valstr && strcmp(valstr, TICameraParameters::VIDEO_MODE)) ) {\r\n CAMHAL_LOGEA("Trying to capture while recording without recording hint set...");\r\n return INVALID_OPERATION;\r\n }\r\n\r\n if ( !mBracketingRunning )\r\n {\r\n\r\n if ( NO_ERROR == ret )\r\n {\r\n burst = mParameters.getInt(TICameraParameters::KEY_BURST);\r\n }\r\n\r\n \/\/Allocate all buffers only in burst capture case\r\n if ( burst > 1 )\r\n {\r\n bufferCount = CameraHal::NO_BUFFERS_IMAGE_CAPTURE;\r\n if ( NULL != mAppCallbackNotifier.get() )\r\n {\r\n mAppCallbackNotifier->setBurst(true);\r\n }\r\n }\r\n else\r\n {\r\n if ( NULL != mAppCallbackNotifier.get() )\r\n {\r\n mAppCallbackNotifier->setBurst(false);\r\n }\r\n }\r\n\r\n \/\/ \u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u6211\u4eec\u6b63\u5e38\u62cd\u7167\uff0cpreview\u5c31\u4f1astop\u4f4f\uff0c\u62cd\u5b8c\u4e00\u5f20\u4e4b\u540e\u9700\u8981\u53bbstartPreview\r\n \/\/ pause preview during normal image capture\r\n \/\/ do not pause preview if recording (video state)\r\n if (NO_ERROR == ret &&\r\n NULL != mDisplayAdapter.get() &&\r\n burst < 1) {\r\n if (mCameraAdapter->getState() != CameraAdapter::VIDEO_STATE) {\r\n mDisplayPaused = true;\r\n mPreviewEnabled = false;\r\n ret = mDisplayAdapter->pauseDisplay(mDisplayPaused);\r\n \/\/ since preview is paused we should stop sending preview frames too\r\n if(mMsgEnabled & CAMERA_MSG_PREVIEW_FRAME) {\r\n mAppCallbackNotifier->disableMsgType (CAMERA_MSG_PREVIEW_FRAME);\r\n }\r\n }\r\n\r\n#if PPM_INSTRUMENTATION || PPM_INSTRUMENTATION_ABS\r\n mDisplayAdapter->setSnapshotTimeRef(&mStartCapture);\r\n#endif\r\n }\r\n\r\n \/\/ if we taking video snapshot...\r\n if ((NO_ERROR == ret) && (mCameraAdapter->getState() == CameraAdapter::VIDEO_STATE)) {\r\n \/\/ enable post view frames if not already enabled so we can internally\r\n \/\/ save snapshot frames for generating thumbnail\r\n if((mMsgEnabled & CAMERA_MSG_POSTVIEW_FRAME) == 0) {\r\n mAppCallbackNotifier->enableMsgType(CAMERA_MSG_POSTVIEW_FRAME);\r\n }\r\n }\r\n\r\n if ( (NO_ERROR == ret) && (NULL != mCameraAdapter) )\r\n {\r\n if ( NO_ERROR == ret )\r\n ret = mCameraAdapter->sendCommand(CameraAdapter::CAMERA_QUERY_BUFFER_SIZE_IMAGE_CAPTURE,\r\n ( int ) &frame,\r\n bufferCount);\r\n\r\n if ( NO_ERROR != ret )\r\n {\r\n CAMHAL_LOGEB("CAMERA_QUERY_BUFFER_SIZE_IMAGE_CAPTURE returned error 0x%x", ret);\r\n }\r\n }\r\n\r\n if ( NO_ERROR == ret )\r\n {\r\n mParameters.getPictureSize(( int * ) &frame.mWidth,\r\n ( int * ) &frame.mHeight);\r\n\r\n \/\/ \u5206\u914dbuffer\r\n ret = allocImageBufs(frame.mWidth,\r\n frame.mHeight,\r\n frame.mLength,\r\n mParameters.getPictureFormat(),\r\n bufferCount);\r\n if ( NO_ERROR != ret )\r\n {\r\n CAMHAL_LOGEB("allocImageBufs returned error 0x%x", ret);\r\n }\r\n }\r\n\r\n if ( (NO_ERROR == ret) && ( NULL != mCameraAdapter ) )\r\n {\r\n desc.mBuffers = mImageBufs;\r\n desc.mOffsets = mImageOffsets;\r\n desc.mFd = mImageFd;\r\n desc.mLength = mImageLength;\r\n desc.mCount = ( size_t ) bufferCount;\r\n desc.mMaxQueueable = ( size_t ) bufferCount;\r\n\r\n ret = mCameraAdapter->sendCommand(CameraAdapter::CAMERA_USE_BUFFERS_IMAGE_CAPTURE,\r\n ( int ) &desc);\r\n }\r\n }\r\n\r\n if ( ( NO_ERROR == ret ) && ( NULL != mCameraAdapter ) )\r\n {\r\n\r\n#if PPM_INSTRUMENTATION || PPM_INSTRUMENTATION_ABS\r\n\r\n \/\/pass capture timestamp along with the camera adapter command\r\n ret = mCameraAdapter->sendCommand(CameraAdapter::CAMERA_START_IMAGE_CAPTURE, (int) &mStartCapture);\r\n\r\n#else\r\n\r\n ret = mCameraAdapter->sendCommand(CameraAdapter::CAMERA_START_IMAGE_CAPTURE);\r\n\r\n#endif\r\n\r\n }\r\n\r\n return ret;\r\n}<\/pre>\n\u7ecf\u8fc7BaseCameraAdapter(\u8fd9\u4e2a\u5f53\u4e2d\u7684takePicture\u5b9e\u73b0\u53ea\u662fStub)\u4f1a\u5230
\nstatus_t OMXCameraAdapter::takePicture()\uff0c\u7136\u540e\u4f1a\u5c06\u8be5\u52a8\u4f5c\u52a0\u5165\u5230Command\u961f\u5217\u5f53\u4e2d\u53bb\u6267\u884c\uff0c\u6700\u7ec8\u5b9e\u73b0\u5728OMXCapture::startImageCapture()\u5f53\u4e2d\u3002
\n\u8fd9\u91cc\u5c31\u4f1a\u900f\u8fc7OMX_FillThisBuffer\u538b\u5165buffer\u5230capture port\uff0c\u5f53capture\u5b8c\u6210\u4e4b\u540e\u4f1a\u6536\u5230FillBufferDone\u8fd9\u4e2acallback\uff0c\u8fdb\u5165\u56de\u8c03\u51fd\u6570\u3002<\/p>\n
OMX_ERRORTYPE OMXCameraAdapter::OMXCameraGetHandle(OMX_HANDLETYPE *handle, OMX_PTR pAppData )\r\n{\r\n OMX_ERRORTYPE eError = OMX_ErrorUndefined;\r\n\r\n for ( int i = 0; i < 5; ++i ) {\r\n if ( i > 0 ) {\r\n \/\/ sleep for 100 ms before next attempt\r\n usleep(100000);\r\n }\r\n\r\n \/\/ setup key parameters to send to Ducati during init\r\n OMX_CALLBACKTYPE oCallbacks;\r\n\r\n \/\/ initialize the callback handles \/\/ \u6ce8\u518ccallback\r\n oCallbacks.EventHandler = android::OMXCameraAdapterEventHandler;\r\n oCallbacks.EmptyBufferDone = android::OMXCameraAdapterEmptyBufferDone;\r\n oCallbacks.FillBufferDone = android::OMXCameraAdapterFillBufferDone;\r\n\r\n \/\/ get handle\r\n eError = OMX_GetHandle(handle, (OMX_STRING)"OMX.TI.DUCATI1.VIDEO.CAMERA", pAppData, &oCallbacks);\r\n \/\/ \u6ce8\u610f\u8fd9\u4e2alibrary\uff0c\u5b9e\u9645\u5c31\u662f\/path\/to\/aosp\/hardware\/ti\/omap4xxx\/domx\/omx_proxy_component\/omx_camera\/src\/omx_proxy_camera.c\r\n \/\/ \u6700\u7ec8\u901a\u8fc7pRPCCtx->fd_omx = open("\/dev\/rpmsg-omx1", O_RDWR);\u8ddf\u5e95\u5c42\u4ea4\u4e92\r\n if ( eError == OMX_ErrorNone ) {\r\n return OMX_ErrorNone;\r\n }\r\n\r\n CAMHAL_LOGEB("OMX_GetHandle() failed, error: 0x%x", eError);\r\n }\r\n\r\n *handle = 0;\r\n return eError;\r\n}<\/pre>\n\u6709\u4e86\u56de\u8c03\u51fd\u6570\u5c31\u4f1a\u4e00\u76f4\u5f80\u4e0a\u5c42\u4f20\uff0c\u6700\u7ec8\u5c31\u7528\u6237\u5c31\u5f97\u5230\u4e86\u62cd\u6444\u7684\u7167\u7247\u6570\u636e\u3002
\nCameraAdapter_Factory(size_t sensor_index)\u5728OMXCameraAdapter\u5f53\u4e2d\u3002<\/p>\n
\u53e6\u5916TI Omap\u8fd8\u6709\u5b9e\u73b0\u4e00\u5957\u901a\u8fc7V4L2\u4ea4\u4e92\u7684\u65b9\u5f0f\uff0c\u53ea\u662f\u9ed8\u8ba4\u6ca1\u6709\u542f\u7528\u3002
\n\u5b83\u662f\u7ecf\u8fc7V4LCameraAdapter::UseBuffersPreview
\n\u6700\u7ec8\u4f1a\u8d70\u5411V4L2\u4e2d\u53bb<\/p>\n
\u800cCameraAdapter_Factory()\u5728V4LCameraAdapter\u5f53\u4e2d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4ee5TI\u7684platform\u4e3a\u4f8b\u5b50\uff0c\u4e5f\u5c31\u662f\u8fd9\u4e24\u4e2a\u6587\u4ef6 \/path\/to\/aosp\/frameworks\/av\/services\/camera\/libcameraservice\/CameraHardwareInterface.h \u548c \/path\/to\/aosp\/hardware\/ti\/omap4xxx\/camera\/CameraHal.cpp \u662f\u5982\u4f55\u5173\u8054\u7684\u3002 \u8c01\u6765\u52a0\u8f7dcamera.$platform$.so\uff0c\u8fd9\u4e2a\u662f\u771f\u6b63\u7684HAL\u7684\u5b9e\u73b0\uff0c\u91cc\u9762\u5b9e\u9645\u6700\u7ec8\u4f1a\u53bb\u8c03\u7528Driver(\u4e2d\u95f4\u900f\u8fc7rpmsg-omx1)\u3002 \u597d\u7a81\u7136\uff0c\u53ef\u80fd\u4f60\u73b0\u5728\u8fd8\u4e0d\u77e5\u9053camera.$platform$.so\u662f\u4ec0\u4e48\uff1f\u662f\u8fd9\u6837\u7684\uff0c\u4f46\u662f\u5230\u4f60\u770b\u5230\u540e\u9762\u4f60\u5c31\u4f1a\u53d1\u73b0Vendor\u7684HAL\u5b9e\u73b0\u662f\u5305\u6210\u4e00\u4e2aso\u6863\u7684\uff0c\u4e5f\u5c31\u662f\u8fd9\u4e2a\u3002 void CameraService::onFirstRef() { BnCameraService::onFirstRef(); if (hw_get_module(CAMERA_HARDWARE_MODULE_ID, (const hw_module_t **)&mModule) < 0) { ALOGE("Could not load camera HAL module"); mNumberOfCameras = 0; } else { mNumberOfCameras = mModule->get_number_of_cameras(); if (mNumberOfCameras > MAX_CAMERAS) { ALOGE("Number of cameras(%d) > MAX_CAMERAS(%d).", mNumberOfCameras, MAX_CAMERAS); mNumberOfCameras = MAX_CAMERAS; } for (int i = 0; … Continue reading Android\u7684HAL\u548cVendor\u7684HAL\u5b9e\u73b0\u662f\u5982\u4f55\u5173\u8054\u8d77\u6765\u7684<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gfmr_meta_descriptions":[],"_gfmr_multilingual_taxonomy_terms":[],"footnotes":""},"categories":[7,28,34],"tags":[27],"class_list":["post-635","post","type-post","status-publish","format-standard","hentry","category-android","category-cpp","category-multimedia","tag-camera"],"_links":{"self":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts\/635","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/comments?post=635"}],"version-history":[{"count":5,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts\/635\/revisions"}],"predecessor-version":[{"id":654,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts\/635\/revisions\/654"}],"wp:attachment":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/media?parent=635"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/categories?post=635"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/tags?post=635"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}