获取相机码流相关功能的头文件为dji_liveview.h，本文档描述了dji_liveview.h 文件中结构体和函数原型的关键信息和使用方法。

目录

• 宏定义、枚举与结构体
  E_DjiLiveViewCameraPosition
  E_DjiLiveViewCameraSource
  DjiLiveview_H264Callback

• 函数原型
  DjiLiveview_Init
  DjiLiveview_Deinit
  DjiLiveview_StartH264Stream
  DjiLiveview_StopH264Stream
  DjiLiveview_RequestIntraframeFrameData
  

宏定义、枚举与结构体

typedef enum E_DjiLiveViewCameraPosition

typedef enum {
    DJI_LIVEVIEW_CAMERA_POSITION_NO_1 = DJI_MOUNT_POSITION_PAYLOAD_PORT_NO1,
    DJI_LIVEVIEW_CAMERA_POSITION_NO_2 = DJI_MOUNT_POSITION_PAYLOAD_PORT_NO2,
    DJI_LIVEVIEW_CAMERA_POSITION_NO_3 = DJI_MOUNT_POSITION_PAYLOAD_PORT_NO3,
    DJI_LIVEVIEW_CAMERA_POSITION_FPV = 7 
} E_DjiLiveViewCameraPosition;

typedef enum E_DjiLiveViewCameraSource

直播相机源码流

typedef enum {
    DJI_LIVEVIEW_CAMERA_SOURCE_DEFAULT = 0,
    DJI_LIVEVIEW_CAMERA_SOURCE_H20_WIDE = 1,
    DJI_LIVEVIEW_CAMERA_SOURCE_H20_ZOOM = 2,
    DJI_LIVEVIEW_CAMERA_SOURCE_H20T_WIDE = 1,
    DJI_LIVEVIEW_CAMERA_SOURCE_H20T_ZOOM = 2,
    DJI_LIVEVIEW_CAMERA_SOURCE_H20T_IR = 3,
    DJI_LIVEVIEW_CAMERA_SOURCE_H20N_WIDE = 1,
    DJI_LIVEVIEW_CAMERA_SOURCE_H20N_ZOOM = 2,
    DJI_LIVEVIEW_CAMERA_SOURCE_H20N_IR = 3,
    DJI_LIVEVIEW_CAMERA_SOURCE_M30_ZOOM = 1,
    DJI_LIVEVIEW_CAMERA_SOURCE_M30_WIDE = 2,
    DJI_LIVEVIEW_CAMERA_SOURCE_M30T_ZOOM = 1,
    DJI_LIVEVIEW_CAMERA_SOURCE_M30T_WIDE = 2,
    DJI_LIVEVIEW_CAMERA_SOURCE_M30T_IR = 3,
    DJI_LIVEVIEW_CAMERA_SOURCE_M3E_VIS = 1,
    DJI_LIVEVIEW_CAMERA_SOURCE_M3T_VIS = 1,
    DJI_LIVEVIEW_CAMERA_SOURCE_M3T_IR = 2,
    DJI_LIVEVIEW_CAMERA_SOURCE_M3D_VIS = 1,
    DJI_LIVEVIEW_CAMERA_SOURCE_M3TD_VIS = 1,
    DJI_LIVEVIEW_CAMERA_SOURCE_M3TD_IR = 2,
} E_DjiLiveViewCameraSource;

typedef function DjiLiveview_H264Callback

typedef void (*DjiLiveview_H264Callback)(E_DjiLiveViewCameraPosition position, const uint8_t *buf, uint32_t len);

函数原型

function DjiLiveview_Init

功能：liveview模块初始化

product：all

接口初始化需要在 DjiCore_Init 之后。

T_DjiReturnCode DjiLiveview_Init(void);

返回值
根据程序执行的情况输出对应的返回值，详情请参见：DjiErrorCode

function DjiLiveview_Deinit

功能：liveview模块反初始化

product：all

T_DjiReturnCode DjiLiveview_Deinit(void);

返回值
根据程序执行的情况输出对应的返回值，详情请参见：DjiErrorCode

function DjiLiveview_StartH264Stream

功能：按选定位置启动 FPV 或摄像机 H264 流。

product：all

T_DjiReturnCode DjiLiveview_StartH264Stream(E_DjiLiveViewCameraPosition position, E_DjiLiveViewCameraSource source,
                                            DjiLiveview_H264Callback callback);

参数
position：指出哪个相机输出H264流
source：指出哪个子摄像头输出H264码流
callback：接收到新的h264帧时在回调线程中调用的回调函数
返回值
根据程序执行的情况输出对应的返回值，详情请参见：DjiErrorCode

function DjiLiveview_StopH264Stream

功能：按选定位置关闭 FPV 或摄像机 H264 流。

product：all

T_DjiReturnCode DjiLiveview_StopH264Stream(E_DjiLiveViewCameraPosition position);

参数
position：指出哪个相机输出H264流
返回值
根据程序执行的情况输出对应的返回值，详情请参见：DjiErrorCode