CameraMetaData
标签：generate hat 信息 char session methods mil 摄像头 dde
一、camera_metadata简介
Camera API2/HAL3架构下使用了全新的CameraMetadata结构取代了之前的SetParameter/Paramters等操作，实现了Java到native到HAL3的参数传递。引入了管道的概念将安卓设备和摄像头之间联系起来，系统向摄像头发送 Capture 请求，而摄像头会返回 CameraMetadata，这一切建立在一个叫作 CameraCaptureSession 的会话中。和Camera_metadata数据结构相关的主要有以下几个文件：
system/media/camera/include/system/camera_metadata_tags.h(不允许直接引用该头文件，如需引用，可以引用camera_metadata.h)
system/media/camera/include/system/camera_metadata.h
system/media/camera/include/system/camera_vendor_tags.h(给各个芯片厂商扩展的tag)
system/media/camera/src/camera_metadata_tag_info.c(不允许直接调用该文件中的函数，如需调用，调用camera_metadata.c中包装函数)
system/media/camera/src/camera_metadata.c
framework/av/camera/CameraMetadata.cpp
framework/av/include/camera/CameraMetadata.h
frameworks/base/core/jni/android_hardware_camera2_CameraMetadata.cpp
二、Framework到HAL层的转换
Camera2Client 使用 API1 传递参数采用的逻辑是还是在Java层预留了setParameters接口，只是当Parameter在设置时比起CameraClient而言，是将这个Parameter根据不同的TAG形式直接绑定到CameraMetadata mPreviewRequest/mRecordRequest/mCaptureRequest中，这些数据会由Capture_Request转为camera3_capture_request中的camera_metadata_t settings完成参数从Java到native到HAL3的传递。
但是在Camera API2下，不再需要那么复杂的转换过程，在Java层中直接对参数进行设置并将其封装到Capture_Request即可，即参数控制由Java层来完成。这也体现了API2中Request和Result在APP中就大量存在的原因。对此为了和Framework Native层相关TAG数据的统一，在Java层中大量出现的参数设置是通过Section Tag的name来交由Native完成转换生成在Java层的TAG。
（1）Java层对应代码位置：frameworks/base/core/java/android/hardware/camera2/impl/CameraMetadataNative.java
1 private <T> T getBase(Key<T> key) { 2 int tag = nativeGetTagFromKeyLocal(key.getName()); 3 byte[] values = readValues(tag); 4 if (values == null) { 5 // If the key returns null, use the fallback key if exists. 6 // This is to support old key names for the newly published keys. 7 if (key.mFallbackName == null) { 8 return null; 9 }10 tag = nativeGetTagFromKeyLocal(key.mFallbackName);11 values = readValues(tag);12 if (values == null) {13 return null;14 }15 }16 17 int nativeType = nativeGetTypeFromTagLocal(tag);18 Marshaler<T> marshaler = getMarshalerForKey(key, nativeType);19 ByteBuffer buffer = ByteBuffer.wrap(values).order(ByteOrder.nativeOrder());20 return marshaler.unmarshal(buffer);21 }（2）Native层对应代码位置：frameworks/base/core/jni/android_hardware_camera2_CameraMetadata.cpp
1 static const JNINativeMethod gCameraMetadataMethods[] = { 2 // static methods 3 { "nativeGetTagFromKey", 4 "(Ljava/lang/String;J)I", 5 (void *)CameraMetadata_getTagFromKey }, 6 { "nativeGetTypeFromTag", 7 "(IJ)I", 8 (void *)CameraMetadata_getTypeFromTag }, 9 { "nativeSetupGlobalVendorTagDescriptor",10 "()I",11 (void*)CameraMetadata_setupGlobalVendorTagDescriptor },12 // instance methods13 { "nativeAllocate",14 "()J",15 (void*)CameraMetadata_allocate },16 { "nativeAllocateCopy",17 "(L" CAMERA_METADATA_CLASS_NAME ";)J",18 (void *)CameraMetadata_allocateCopy },19 { "nativeIsEmpty",20 "()Z",21 (void*)CameraMetadata_isEmpty },22 { "nativeGetEntryCount",23 "()I",24 (void*)CameraMetadata_getEntryCount },25 { "nativeClose",26 "()V",27 (void*)CameraMetadata_close },28 { "nativeSwap",29 "(L" CAMERA_METADATA_CLASS_NAME ";)V",30 (void *)CameraMetadata_swap },31 { "nativeGetTagFromKeyLocal",32 "(Ljava/lang/String;)I",33 (void *)CameraMetadata_getTagFromKeyLocal },34 { "nativeGetTypeFromTagLocal",35 "(I)I",36 (void *)CameraMetadata_getTypeFromTagLocal },37 ...38 };其中CameraMetadata_getTagFromKey是实现将一个Java层的string转为一个tag的值，如：android.control.mode。对比最初不同的Section name就可以发现前面两个x.y的字符串就是代表是Section name.而后面mode即是在该section下的tag数值，所以通过对这个string的分析可知，就可以定位对应的section以及tag值，这样返回到Java层的就是key相应的tag值了。继续追踪到 \system\media\camera\src\camera_metadata.c：
1 // Declared in system/media/private/camera/include/camera_metadata_hidden.h 2 const char *get_local_camera_metadata_tag_name_vendor_id(uint32_t tag, 3 metadata_vendor_id_t id) { 4 uint32_t tag_section = tag >> 16; 5 if (tag_section >= VENDOR_SECTION && vendor_cache_ops != NULL && 6 id != CAMERA_METADATA_INVALID_VENDOR_ID) { 7 return vendor_cache_ops->get_tag_name(tag, id); 8 } else if (tag_section >= VENDOR_SECTION && vendor_tag_ops != NULL) { 9 return vendor_tag_ops->get_tag_name(10 vendor_tag_ops,11 tag);12 }13 if (tag_section >= ANDROID_SECTION_COUNT ||14 tag >= camera_metadata_section_bounds[tag_section][1] ) { // 关键是camera_metadata_section_bounds这个数组，保存了各个tag的绑定信息15 return NULL;16 }17 uint32_t tag_index = tag & 0xFFFF;18 return tag_info[tag_section][tag_index].tag_name;19 }相关文件调用关系如下：
其中 camera_metadata_tags.h 包含了所有的基本宏，每一个section的大小是64K（每个section_start 由section偏移16位，也就是2^16=65536，即64K）。tag也就是又section_start偏移而来，比如android.control.mode，由camera_metadata_section--->ANDROID_CONTROL找到对应的camera_metadata_section_start--->ANDROID_CONTROL_START，然后在camera_metadata_tag找到对应的ANDROID_CONTROL_MODE，也就是tag值。
1 /** 2 * !! Do not include this file directly !! 3 * 4 * Include camera_metadata.h instead. 5 */ 6 7 /** 8 * ! Do not edit this file directly ! 9 * 10 * Generated automatically from camera_metadata_tags.mako 11 */ 12 13 /** TODO: Nearly every enum in this file needs a description */ 14 15 /** 16 * Top level hierarchy definitions for camera metadata. *_INFO sections are for 17 * the static metadata that can be retrived without opening the camera device. 18 * New sections must be added right before ANDROID_SECTION_COUNT to maintain 19 * existing enumerations. 20 */ 21 typedef enum camera_metadata_section { 22 ANDROID_COLOR_CORRECTION, 23 ANDROID_CONTROL, 24 ANDROID_DEMOSAIC, 25 ANDROID_EDGE, 26 ANDROID_FLASH, 27 ANDROID_FLASH_INFO, 28 ANDROID_HOT_PIXEL, 29 ANDROID_JPEG, 30 ANDROID_LENS, 31 ANDROID_LENS_INFO, 32 ANDROID_NOISE_REDUCTION, 33 ANDROID_QUIRKS, 34 ANDROID_REQUEST, 35 ANDROID_SCALER, 36 ANDROID_SENSOR, 37 ANDROID_SENSOR_INFO, 38 ANDROID_SHADING, 39 ANDROID_STATISTICS, 40 ANDROID_STATISTICS_INFO, 41 ANDROID_TONEMAP, 42 ANDROID_LED, 43 ANDROID_INFO, 44 ANDROID_BLACK_LEVEL, 45 ANDROID_SYNC, 46 ANDROID_REPROCESS, 47 ANDROID_DEPTH, 48 ANDROID_LOGICAL_MULTI_CAMERA, 49 ANDROID_DISTORTION_CORRECTION, 50 ANDROID_HEIC, 51 ANDROID_HEIC_INFO, 52 ANDROID_H264, 53 ANDROID_H265, 54 ANDROID_SECTION_COUNT, 55 56 VENDOR_SECTION = 0x8000 57 } camera_metadata_section_t; 58 59 /** 60 * Hierarchy positions in enum space. All vendor extension tags must be 61 * defined with tag >= VENDOR_SECTION_START 62 */ 63 typedef enum camera_metadata_section_start { 64 ANDROID_COLOR_CORRECTION_START = ANDROID_COLOR_CORRECTION << 16, 65 ANDROID_CONTROL_START = ANDROID_CONTROL << 16, 66 ANDROID_DEMOSAIC_START = ANDROID_DEMOSAIC << 16, 67 ANDROID_EDGE_START = ANDROID_EDGE << 16, 68 ANDROID_FLASH_START = ANDROID_FLASH << 16, 69 ANDROID_FLASH_INFO_START = ANDROID_FLASH_INFO << 16, 70 ANDROID_HOT_PIXEL_START = ANDROID_HOT_PIXEL << 16, 71 ANDROID_JPEG_START = ANDROID_JPEG << 16, 72 ANDROID_LENS_START = ANDROID_LENS << 16, 73 ANDROID_LENS_INFO_START = ANDROID_LENS_INFO << 16, 74 ANDROID_NOISE_REDUCTION_START = ANDROID_NOISE_REDUCTION << 16, 75 ANDROID_QUIRKS_START = ANDROID_QUIRKS << 16, 76 ANDROID_REQUEST_START = ANDROID_REQUEST << 16, 77 ANDROID_SCALER_START = ANDROID_SCALER << 16, 78 ANDROID_SENSOR_START = ANDROID_SENSOR << 16, 79 ANDROID_SENSOR_INFO_START = ANDROID_SENSOR_INFO << 16, 80 ANDROID_SHADING_START = ANDROID_SHADING << 16, 81 ANDROID_STATISTICS_START = ANDROID_STATISTICS << 16, 82 ANDROID_STATISTICS_INFO_START = ANDROID_STATISTICS_INFO << 16, 83 ANDROID_TONEMAP_START = ANDROID_TONEMAP << 16, 84 ANDROID_LED_START = ANDROID_LED << 16, 85 ANDROID_INFO_START = ANDROID_INFO << 16, 86 ANDROID_BLACK_LEVEL_START = ANDROID_BLACK_LEVEL << 16, 87 ANDROID_SYNC_START = ANDROID_SYNC << 16, 88 ANDROID_REPROCESS_START = ANDROID_REPROCESS << 16, 89 ANDROID_DEPTH_START = ANDROID_DEPTH << 16, 90 ANDROID_LOGICAL_MULTI_CAMERA_START 91 = ANDROID_LOGICAL_MULTI_CAMERA 92 << 16, 93 ANDROID_DISTORTION_CORRECTION_START 94 = ANDROID_DISTORTION_CORRECTION 95 << 16, 96 ANDROID_HEIC_START = ANDROID_HEIC << 16, 97 ANDROID_HEIC_INFO_START = ANDROID_HEIC_INFO << 16, 98 ANDROID_H264_START = ANDROID_H264 << 16, 99 ANDROID_H265_START = ANDROID_H265 << 16,100 VENDOR_SECTION_START = VENDOR_SECTION << 16101 } camera_metadata_section_start_t;
1 /** 2 * Main enum for defining camera metadata tags. New entries must always go 3 * before the section _END tag to preserve existing enumeration values. In 4 * addition, the name and type of the tag needs to be added to 5 * system/media/camera/src/camera_metadata_tag_info.c 6 */ 7 typedef enum camera_metadata_tag { 8 ANDROID_COLOR_CORRECTION_MODE = // enum | public | HIDL v3.2 9 ANDROID_COLOR_CORRECTION_START,10 ANDROID_COLOR_CORRECTION_TRANSFORM, // rational[] | public | HIDL v3.211 ANDROID_COLOR_CORRECTION_GAINS, // float[] | public | HIDL v3.212 ANDROID_COLOR_CORRECTION_ABERRATION_MODE, // enum | public | HIDL v3.213 ANDROID_COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES,14 // byte[] | public | HIDL v3.215 ANDROID_COLOR_CORRECTION_END,16 17 ANDROID_CONTROL_AE_ANTIBANDING_MODE = // enum | public | HIDL v3.218 ANDROID_CONTROL_START,19 ANDROID_CONTROL_AE_EXPOSURE_COMPENSATION, // int32 | public | HIDL v3.220 ANDROID_CONTROL_AE_LOCK, // enum | public | HIDL v3.221 ANDROID_CONTROL_AE_MODE, // enum | public | HIDL v3.222 ANDROID_CONTROL_AE_REGIONS, // int32[] | public | HIDL v3.223 ANDROID_CONTROL_AE_TARGET_FPS_RANGE, // int32[] | public | HIDL v3.224 ANDROID_CONTROL_AE_PRECAPTURE_TRIGGER, // enum | public | HIDL v3.225 ANDROID_CONTROL_AF_MODE, // enum | public | HIDL v3.226 ANDROID_CONTROL_AF_REGIONS, // int32[] | public | HIDL v3.227 ANDROID_CONTROL_AF_TRIGGER, // enum | public | HIDL v3.228 ANDROID_CONTROL_AWB_LOCK, // enum | public | HIDL v3.229 ANDROID_CONTROL_AWB_MODE, // enum | public | HIDL v3.230 ANDROID_CONTROL_AWB_REGIONS, // int32[] | public | HIDL v3.231 ANDROID_CONTROL_CAPTURE_INTENT, // enum | public | HIDL v3.232 ANDROID_CONTROL_EFFECT_MODE, // enum | public | HIDL v3.233 ANDROID_CONTROL_MODE, // enum | public | HIDL v3.234 ANDROID_CONTROL_SCENE_MODE, // enum | public | HIDL v3.235 ANDROID_CONTROL_VIDEO_STABILIZATION_MODE, // enum | public | HIDL v3.236 ANDROID_CONTROL_AE_AVAILABLE_ANTIBANDING_MODES, // byte[] | public | HIDL v3.237 ANDROID_CONTROL_AE_AVAILABLE_MODES, // byte[] | public | HIDL v3.238 ANDROID_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES, // int32[] | public | HIDL v3.239 ANDROID_CONTROL_AE_COMPENSATION_RANGE, // int32[] | public | HIDL v3.240 ANDROID_CONTROL_AE_COMPENSATION_STEP, // rational | public | HIDL v3.241 ANDROID_CONTROL_AF_AVAILABLE_MODES, // byte[] | public | HIDL v3.242 ANDROID_CONTROL_AVAILABLE_EFFECTS, // byte[] | public | HIDL v3.243 ANDROID_CONTROL_AVAILABLE_SCENE_MODES, // byte[] | public | HIDL v3.244 ANDROID_CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES,45 // byte[] | public | HIDL v3.246 ANDROID_CONTROL_AWB_AVAILABLE_MODES, // byte[] | public | HIDL v3.247 ANDROID_CONTROL_MAX_REGIONS, // int32[] | ndk_public | HIDL v3.248 ANDROID_CONTROL_SCENE_MODE_OVERRIDES, // byte[] | system | HIDL v3.249 ANDROID_CONTROL_AE_PRECAPTURE_ID, // int32 | system | HIDL v3.250 ANDROID_CONTROL_AE_STATE, // enum | public | HIDL v3.251 ANDROID_CONTROL_AF_STATE, // enum | public | HIDL v3.252 ANDROID_CONTROL_AF_TRIGGER_ID, // int32 | system | HIDL v3.253 ANDROID_CONTROL_AWB_STATE, // enum | public | HIDL v3.254 ANDROID_CONTROL_AVAILABLE_HIGH_SPEED_VIDEO_CONFIGURATIONS,55 // int32[] | hidden | HIDL v3.256 ANDROID_CONTROL_AE_LOCK_AVAILABLE, // enum | public | HIDL v3.257 ANDROID_CONTROL_AWB_LOCK_AVAILABLE, // enum | public | HIDL v3.258 ANDROID_CONTROL_AVAILABLE_MODES, // byte[] | public | HIDL v3.259 ANDROID_CONTROL_POST_RAW_SENSITIVITY_BOOST_RANGE, // int32[] | public | HIDL v3.260 ANDROID_CONTROL_POST_RAW_SENSITIVITY_BOOST, // int32 | public | HIDL v3.261 ANDROID_CONTROL_ENABLE_ZSL, // enum | public | HIDL v3.262 ANDROID_CONTROL_AF_SCENE_CHANGE, // enum | public | HIDL v3.363 ANDROID_CONTROL_END,64 65 ......对应关系如图所示：
然后在 camera_metadata_tag_info.c 中进行了映射和绑定，前面Native层CameraMetadata_getTagFromKey--->getTagFromName--->camera_metadata_section_bounds调用的camera_metadata_section_bounds实现在这里：
1 /** 2 * ! Do not edit this file directly ! 3 * 4 * Generated automatically from camera_metadata_tag_info.mako 5 */ 6 7 const char *camera_metadata_section_names[ANDROID_SECTION_COUNT] = { 8 [ANDROID_COLOR_CORRECTION] = "android.colorCorrection", 9 [ANDROID_CONTROL] = "android.control",10 [ANDROID_DEMOSAIC] = "android.demosaic",11 [ANDROID_EDGE] = "android.edge",12 [ANDROID_FLASH] = "android.flash",13 [ANDROID_FLASH_INFO] = "android.flash.info",14 [ANDROID_HOT_PIXEL] = "android.hotPixel",15 [ANDROID_JPEG] = "android.jpeg",16 [ANDROID_LENS] = "android.lens",17 [ANDROID_LENS_INFO] = "android.lens.info",18 [ANDROID_NOISE_REDUCTION] = "android.noiseReduction",19 [ANDROID_QUIRKS] = "android.quirks",20 [ANDROID_REQUEST] = "android.request",21 [ANDROID_SCALER] = "android.scaler",22 [ANDROID_SENSOR] = "android.sensor",23 [ANDROID_SENSOR_INFO] = "android.sensor.info",24 [ANDROID_SHADING] = "android.shading",25 [ANDROID_STATISTICS] = "android.statistics",26 [ANDROID_STATISTICS_INFO] = "android.statistics.info",27 [ANDROID_TONEMAP] = "android.tonemap",28 [ANDROID_LED] = "android.led",29 [ANDROID_INFO] = "android.info",30 [ANDROID_BLACK_LEVEL] = "android.blackLevel",31 [ANDROID_SYNC] = "android.sync",32 [ANDROID_REPROCESS] = "android.reprocess",33 [ANDROID_DEPTH] = "android.depth",34 [ANDROID_LOGICAL_MULTI_CAMERA] = "android.logicalMultiCamera",35 [ANDROID_DISTORTION_CORRECTION]36 = "android.distortionCorrection",37 };38 39 unsigned int camera_metadata_section_bounds[ANDROID_SECTION_COUNT][2] = {40 [ANDROID_COLOR_CORRECTION] = { ANDROID_COLOR_CORRECTION_START,41 ANDROID_COLOR_CORRECTION_END },42 [ANDROID_CONTROL] = { ANDROID_CONTROL_START,43 ANDROID_CONTROL_END },44 [ANDROID_DEMOSAIC] = { ANDROID_DEMOSAIC_START,45 ANDROID_DEMOSAIC_END },46 [ANDROID_EDGE] = { ANDROID_EDGE_START,47 ANDROID_EDGE_END },48 [ANDROID_FLASH] = { ANDROID_FLASH_START,49 ANDROID_FLASH_END },50 [ANDROID_FLASH_INFO] = { ANDROID_FLASH_INFO_START,51 ANDROID_FLASH_INFO_END },52 [ANDROID_HOT_PIXEL] = { ANDROID_HOT_PIXEL_START,53 ANDROID_HOT_PIXEL_END },54 [ANDROID_JPEG] = { ANDROID_JPEG_START,55 ANDROID_JPEG_END },56 [ANDROID_LENS] = { ANDROID_LENS_START,57 ANDROID_LENS_END },58 [ANDROID_LENS_INFO] = { ANDROID_LENS_INFO_START,59 ANDROID_LENS_INFO_END },60 [ANDROID_NOISE_REDUCTION] = { ANDROID_NOISE_REDUCTION_START,61 ANDROID_NOISE_REDUCTION_END },62 [ANDROID_QUIRKS] = { ANDROID_QUIRKS_START,63 ANDROID_QUIRKS_END },64 [ANDROID_REQUEST] = { ANDROID_REQUEST_START,65 ANDROID_REQUEST_END },66 [ANDROID_SCALER] = { ANDROID_SCALER_START,67 ANDROID_SCALER_END },68 [ANDROID_SENSOR] = { ANDROID_SENSOR_START,69 ANDROID_SENSOR_END },70 [ANDROID_SENSOR_INFO] = { ANDROID_SENSOR_INFO_START,71 ANDROID_SENSOR_INFO_END },72 [ANDROID_SHADING] = { ANDROID_SHADING_START,73 ANDROID_SHADING_END },74 [ANDROID_STATISTICS] = { ANDROID_STATISTICS_START,75 ANDROID_STATISTICS_END },76 [ANDROID_STATISTICS_INFO] = { ANDROID_STATISTICS_INFO_START,77 ANDROID_STATISTICS_INFO_END },78 [ANDROID_TONEMAP] = { ANDROID_TONEMAP_START,79 ANDROID_TONEMAP_END },80 [ANDROID_LED] = { ANDROID_LED_START,81 ANDROID_LED_END },82 [ANDROID_INFO] = { ANDROID_INFO_START,83 ANDROID_INFO_END },84 [ANDROID_BLACK_LEVEL] = { ANDROID_BLACK_LEVEL_START,85 ANDROID_BLACK_LEVEL_END },86 [ANDROID_SYNC] = { ANDROID_SYNC_START,87 ANDROID_SYNC_END },88 [ANDROID_REPROCESS] = { ANDROID_REPROCESS_START,89 ANDROID_REPROCESS_END },90 [ANDROID_DEPTH] = { ANDROID_DEPTH_START,91 ANDROID_DEPTH_END },92 [ANDROID_LOGICAL_MULTI_CAMERA] = { ANDROID_LOGICAL_MULTI_CAMERA_START,93 ANDROID_LOGICAL_MULTI_CAMERA_END },94 [ANDROID_DISTORTION_CORRECTION]95 = { ANDROID_DISTORTION_CORRECTION_START,96 ANDROID_DISTORTION_CORRECTION_END },97 };由 tag_info 结构体统一管理：
1 static tag_info_t android_color_correction[ANDROID_COLOR_CORRECTION_END - 2 ANDROID_COLOR_CORRECTION_START] = { 3 [ ANDROID_COLOR_CORRECTION_MODE - ANDROID_COLOR_CORRECTION_START ] = 4 { "mode", TYPE_BYTE }, 5 [ ANDROID_COLOR_CORRECTION_TRANSFORM - ANDROID_COLOR_CORRECTION_START ] = 6 { "transform", TYPE_RATIONAL 7 }, 8 [ ANDROID_COLOR_CORRECTION_GAINS - ANDROID_COLOR_CORRECTION_START ] = 9 { "gains", TYPE_FLOAT },10 [ ANDROID_COLOR_CORRECTION_ABERRATION_MODE - ANDROID_COLOR_CORRECTION_START ] =11 { "aberrationMode", TYPE_BYTE },12 [ ANDROID_COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES - ANDROID_COLOR_CORRECTION_START ] =13 { "availableAberrationModes", TYPE_BYTE },14 };15 16 -------------------------------------------------------------17 18 tag_info_t *tag_info[ANDROID_SECTION_COUNT] = {19 android_color_correction,20 android_control,21 android_demosaic,22 android_edge,23 android_flash,24 android_flash_info,25 android_hot_pixel,26 android_jpeg,27 android_lens,28 android_lens_info,29 android_noise_reduction,30 android_quirks,31 android_request,32 android_scaler,33 android_sensor,34 android_sensor_info,35 android_shading,36 android_statistics,37 android_statistics_info,38 android_tonemap,39 android_led,40 android_info,41 android_black_level,42 android_sync,43 android_reprocess,44 android_depth,45 android_logical_multi_camera,46 android_distortion_correction,47 };下图是Camera Metadata对不同section以及相应section下不同tag的布局图，以最常见的android.control Section为例进行描述：
标签：generate hat 信息 char session methods mil 摄像头 dde
原文地址：https://www.cnblogs.com/SaraMoring/p/14385967.html