video-pc/libs/Recorder/log_helper.h

#ifndef AM_LOG
#define AM_LOG

#include <stdio.h>
#include <time.h>
#include <sys\timeb.h>

#include <windows.h>

class AMLog {
public:
	~AMLog();
	static AMLog* get(const char* path = NULL);
	void printf(const char* format, ...);

private:
	AMLog(FILE* handle);

private:
	static AMLog* _log;
	FILE* _handle;
};


enum AM_LOG_TYPE {
	AL_TYPE_DEBUG = 0,
	AL_TYPE_INFO,
	AL_TYPE_WARN,
	AL_TYPE_ERROR,
	AL_TYPE_FATAL,
};

static const char *AM_LOG_STR[] = { "DEBUG", "INFO", "WARN", "ERROR", "FATAL" };

#define al_printf(type,format,datetime,ms,...)                                 \
         printf("%s-%.3d [%s] [%s(%d)] " format "\n",  datetime,ms,type, __FUNCTION__,__LINE__, ## __VA_ARGS__)

#define PRINT_LINE(type, format, datetime, ms, ...)                     \
    printf("%s-%.3d [%s] [%s(%d)] " format "\n",  datetime,ms,type, __FUNCTION__,__LINE__, ## __VA_ARGS__)

#define al_log(type,format,...) do{                                            \
	struct _timeb now;                                                           \
	struct tm today;                                                             \
	char datetime_str[20];                                                       \
	_ftime_s(&now);                                                              \
	localtime_s(&today, &now.time);                                              \
	strftime(datetime_str, 20, "%Y-%m-%d %H:%M:%S", &today);                     \
	AMLog *am_log = AMLog::get();                                                \
	if(am_log){                                                                     \
		am_log->PRINT_LINE(AM_LOG_STR[type], format, datetime_str, now.millitm, ## __VA_ARGS__);  \
	} else {                                                                      \
		al_printf(AM_LOG_STR[type], format, datetime_str, now.millitm, ## __VA_ARGS__);  \
	}                                                                             \
}while (0)   


#define al_debug(format, ...) al_log(AL_TYPE_DEBUG, format, ## __VA_ARGS__)
#define al_info(format, ...) al_log(AL_TYPE_INFO, format, ## __VA_ARGS__)
#define al_warn(format, ...) al_log(AL_TYPE_WARN, format, ## __VA_ARGS__)
#define al_error(format, ...) al_log(AL_TYPE_ERROR, format, ## __VA_ARGS__)
#define al_fatal(format, ...) al_log(AL_TYPE_FATAL, format, ## __VA_ARGS__)

#endif