typedef struct { can_work_mode_enum working_mode; /*!< can working mode */ uint8_t resync_jump_width; /*!< synchronlzation jump width */ can_clk_enum can_clk; /*!< can module clock */ can_baud_enum can_baud; /*!< can baud set */ uint8_t sampling_times; /*!< sampling timers */ uint8_t error_alarm_count; /*!< error alarm count */ uint8_t int_enable; /*!< interrupt enable */ uint8_t nvic_int_enable; /*!< nvic interrupt enable */ }can_parameter_struct;
时间: 2024-03-30 07:33:57 浏览: 16
这是一个结构体类型定义,定义了一个名为can_parameter_struct的结构体类型,该结构体包含了下列成员:
- working_mode:CAN工作模式,类型为can_work_mode_enum。
- resync_jump_width:同步跳转宽度,类型为uint8_t。
- can_clk:CAN模块时钟,类型为can_clk_enum。
- can_baud:CAN波特率设置,类型为can_baud_enum。
- sampling_times:采样时间,类型为uint8_t。
- error_alarm_count:错误报警计数,类型为uint8_t。
- int_enable:中断使能,类型为uint8_t。
- nvic_int_enable:NVIC中断使能,类型为uint8_t。
相关问题
ffmpeg音频解码av_frame_alloc
av_frame_alloc函数用于为AVFrame结构体分配内存空间,AVFrame结构体用于存储解码后的音视频数据。在音频解码中,可以通过调用该函数为AVFrame结构体分配内存空间,然后将解码后的音频数据存储到该结构体中,最后再进行后续的处理操作。
具体使用方法如下:
```c
AVFrame *frame = av_frame_alloc();
if (!frame) {
// 内存分配失败处理
}
```
其中,AVFrame结构体的定义如下:
```c
typedef struct AVFrame {
/**
* pointers to the data planes/channels.
* This might be different from the first allocated byte
*/
uint8_t *data[AV_NUM_DATA_POINTERS];
/**
* For video, size in bytes of each picture line.
* For audio, size in bytes of each plane.
*/
int linesize[AV_NUM_DATA_POINTERS];
/**
* pointers to the start of each picture line.
* This is used for both video and audio.
*/
uint8_t **extended_data;
/**
* width and height of the video frame
*/
int width, height;
/**
* number of audio samples (per channel) described by this frame
*/
int nb_samples;
/**
* format of the frame, -1 if unknown or unset
* Values correspond to enum AVPixelFormat for video frames,
* enum AVSampleFormat for audio)
*/
int format;
/**
* 1 -> keyframe, 0-> not
*/
int key_frame;
/**
* Picture type of the frame.
*/
enum AVPictureType pict_type;
/**
* Quality (between 1 (good) and FF_LAMBDA_MAX (bad)).
*/
int quality;
/**
* for AV_PIX_FMT_*_BE formats, linesize alignment
*/
int64_t best_effort_timestamp;
/**
* PTS copied from the AVPacket that was decoded to produce this frame.
*/
int64_t pkt_pts;
/**
* DTS copied from the AVPacket that triggered returning this frame.
*/
int64_t pkt_dts;
/**
* duration of the corresponding packet, expressed in
* AVStream->time_base units, 0 if unknown.
*/
int64_t pkt_duration;
uint64_t metadata;
int decode_error_flags;
/**
* number of audio channels
*/
int channels;
/**
* size of the corresponding packet containing the compressed
* frame. It is set to a negative value if unknown.
*/
int pkt_size;
/**
* data type
*/
enum AVSampleFormat sample_fmt;
/**
* presentation timestamp in timebase units
* (time when frame should be shown to user)
* If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.
*/
int64_t pts;
/**
* reordered PTS from the last AVPacket that has been input into the decoder
*/
int64_t best_effort_timestamp;
/**
* sample aspect ratio (0 if unknown)
* - encoding: Set by user.
* - decoding: Set by libavcodec.
*/
AVRational sample_aspect_ratio;
/**
* motion vector table, used for MPEG1/2/4 and H.263 decoding
*/
struct AVPanScan *pan_scan;
/**
* macroblock decision mode
*/
int coded_picture_number;
int display_picture_number;
/**
* quality (between 1 (good) and FF_LAMBDA_MAX (bad))
*/
int quality;
/**
* buffer age (1->was last buffer and dint change, 2->..., ...)
*/
int age;
/**
* is this picture used as reference
*/
int reference;
/**
* QP table
*/
int8_t *qp_table_buf;
/**
* QP store stride
*/
int qp_table_linesize;
/**
* QP values for each macroblock
*/
int8_t *qp_table;
/**
* For hwaccel-format frames, this should be a reference to the
* AVHWFramesContext describing the frame.
* For normal-format frames, this should be NULL.
*/
AVBufferRef *hw_frames_ctx;
} AVFrame;
```
需要注意的是,AVFrame结构体中的成员变量很多,具体使用哪些成员变量取决于具体的应用场景和需求。
翻译这段代码typedef struct { uint8_t Interface_Mark; //界面状态 uint8_t Task_Mark; //任务状态 uint8_t Run_Task; //开始运行任务 } Mark; enum { Main_Interface, Menu_Interface, Task_Interface, }; enum { F_ONE, F_TWO, F_THREE, F_FOUR, Stopping, };
这段代码定义了一个结构体 `Mark`,结构体中包含三个成员变量 `Interface_Mark`、`Task_Mark` 和 `Run_Task`,分别表示界面状态、任务状态和开始运行任务。同时,使用 `enum` 定义了两个枚举类型,第一个枚举类型包含三个元素 `Main_Interface`、`Menu_Interface` 和 `Task_Interface`,分别表示主界面、菜单界面和任务界面;第二个枚举类型包含五个元素 `F_ONE`、`F_TWO`、`F_THREE`、`F_FOUR` 和 `Stopping`,分别表示四个不同的任务和停止任务。