Files
VideoPipe/objects/vp_meta.h
2026-06-03 12:43:14 +08:00

111 lines
3.5 KiB
C++
Executable File

#pragma once
#include <string>
#include <map>
#include <any>
#include <vector>
#include <memory>
#include <chrono>
#include <assert.h>
namespace vp_objects {
// meta type
enum vp_meta_type {
FRAME,
CONTROL
};
// meta trace field
// 1. sequence ->int ,sequence number the meta flowing through pipeline
// 2. node_name ->string ,name of current node the meta flow through
// 3. in_time ->long ,time when the meta arrive current node
// 4. out_time ->long ,time when the meta leave current node
// 5. text_info ->vector ,text info while the meta inside node
enum vp_meta_trace_field {
SEQUENCE,
NODE_NAME,
IN_TIME,
OUT_TIME,
TEXT_INFO
};
// base class for meta
class vp_meta {
private:
protected:
/*
trace table, single record describe how meta flows in each node.
{
"file_src_0": {
"sequence": 0,
"node_name": "file_src_0",
"in_time": 1692384,
"out_time": 1692384,
"trace_desc": ["create frame meta at time 1692384", "...", "..."]
},
"primary_infer": {
"sequence": 1,
"node_name": "file_src_0",
"in_time": 1692384,
"out_time": 1692384,
"trace_desc": ["add 6 targets in frame meta at time 1692384", "...", "..."]
},
"secondary_infer": {
"sequence": 2,
"node_name": "file_src_0",
"in_time": 1692384,
"out_time": 1692384,
"trace_desc": ["updated 6 targets in target_list at 1692384", "...", "..."]
},
"osd": {
"sequence": 3,
"node_name": "file_src_0",
"in_time": 1692384,
"out_time": 1692384,
"trace_desc": ["draw 6 targets in on frame at time 1692384", "...", "..."]
},
"file_des_0": {
"sequence": 4,
"node_name": "file_src_0",
"in_time": 1692384,
"out_time": 1692384,
"trace_desc": ["balabala", "...", "..."]
}
}
*/
//std::map<std::string, std::map<vp_meta_trace_field, std::any>> trace_table;
public:
vp_meta(vp_meta_type meta_type, int channel_index);
~vp_meta();
// the time when meta created
std::chrono::system_clock::time_point create_time;
vp_meta_type meta_type;
// channel the meta belongs to
int channel_index;
// write trace record or not
bool trace_on = false;
// format traces string
virtual std::string get_traces_str();
// format meta string
virtual std::string get_meta_str();
// virtual clone method since we do not know what specific meta we need copy in some situations, return a new pointer pointting to new memory allocation in heap.
// note: every child class need implement its own clone() method.
virtual std::shared_ptr<vp_meta> clone() = 0;
// attach a new trace record for specific node (initialize key-value for current node)
//void attach_trace(std::string node_name);
// update trace record
//void update_trace(std::string node_name, vp_meta_trace_field trace_key, std::any trace_value);
};
}