最新关于ＩＯＳ－１３８１８－１标准抓取PCR值计算transport rate的程序，由于我太懒了，最后还是要借助计算器或者Matlab计算最终结果。该程序只能得到
PCR（i）_base 和 PCR(i)_ext的值，以及PCR(i)所在的TS包的位置。
//fiel: ts_struct.h
#ifndef _TS_STRUCT_H
#define _TS_STRUCT_H
#include <iostream>
class TS_PACKET
{
private:
unsigned int sync_byte; //8
unsigned int transport_error_indicator; //1
unsigned int payload_unit_start_indicator; //1
unsigned int transport_priority; //1
unsigned int PID; //13
unsigned int transport_scrambling_control; //2
unsigned int adaptation_field_control; //2
unsigned int continuity_counter; //4
unsigned int adaptation_field_length; //8
unsigned int discontinuity_indicator; //1
unsigned int random_access_indicator; //1
unsigned int elementary_stream_priority_indicator; //1
unsigned int PCR_flag; //1
unsigned int OPCR_flag; //1
unsigned int splicing_point_flag; //1
unsigned int transport_private_data_flag; //1
unsigned int adaptation_field_extension_flag; //1
long PCR_base[2]; //33bit
unsigned int PCR_reserved; //6
unsigned int PCR_ext ; //9
long OPCR_base[2]; //33bit
unsigned int OPCR_reserved; //6
unsigned int OPCR_ext; //9
unsigned int splice_countdown; //8
unsigned int transport_private_data_length; //8
public:
//解析TS数据包
int Process_Packet(FILE * fp) ;
//显示特定数据包内容
void Display_Packet_Info(int i);
void Find_PCR_Code(FILE * fp);
};
extern int PCR_OK;
extern int OPCR_OK;
extern int SP_CD_OK;
#endif
//fiel: ts_struct.cpp
#include "ts_struct.h"
#include <iostream.h>
#include <iomanip.h>
int PCR_OK = 0;
int OPCR_OK = 0;
int SP_CD_OK = 0;
//解析TS数据包
int TS_PACKET::Process_Packet(FILE *fp)
{
long buf[6];
int z = 0;
unsigned int ch;
ch = fgetc(fp);
sync_byte = ch; //1B
ch = fgetc(fp); //1B
transport_error_indicator = (ch & 0x80) >> 7 ; //transport_error_indicator
payload_unit_start_indicator = (ch & 0x40) >> 6; //payload_unit_start_indicator
transport_priority = (ch & 0x20) >> 5; //transport_priority
PID = ((ch & 0x1f) << 8) | fgetc(fp); //PID , Read 1B
ch = fgetc(fp); //1B
transport_scrambling_control = (ch & 0xc0) >> 6; //transport_scrambling_control
adaptation_field_control = (ch & 0x30) >> 4; //adaptation_field_control
continuity_counter = (ch & 0x0f); //continuity_counter
ch = fgetc(fp); //1B
adaptation_field_length = ch; //adaptation_field_length
// adatation field flag
ch = fgetc(fp); //1B
discontinuity_indicator = ch >> 7;
random_access_indicator = (ch >> 6) & 0x01;
elementary_stream_priority_indicator = (ch >> 5) & 0x01;
PCR_flag = (ch >> 4) & 0x01;
OPCR_flag = (ch >> 3) & 0x01;
splicing_point_flag = (ch >> 2) & 0x01;
transport_private_data_flag = (ch >> 1) & 0x01;
adaptation_field_extension_flag = ch & 0x01;
//-------sum 6B
//adaptation field 有效
//自适应区长度不为0
if(( adaptation_field_control == 3 || adaptation_field_control == 2 ) && adaptation_field_length )
{
// 当 PCR_flag 有效时，读 PCR值到缓存 , 6B
if( PCR_flag)
{
for(z = 0; z < 6; z++)
{
buf[z] = 0;
buf[z] = fgetc(fp); //读取PCR数据
}
PCR_base[0] = (buf[0] & 0x80) ? 1 : 0;
PCR_base[1] = (buf[0] << 25) | (buf[1] << 17) | (buf[2] << 9) | (buf[3] << 1) | ((buf[4] & 0x80) >> 7);
PCR_ext = ((buf[4] & 0x01) << 8) | buf[5];
PCR_OK = 1; //PCR数据读取完毕标志
}
else
fseek(fp, 6, 1); //移动文件指针
// 当 OPCR_flag 有效时，读 OPCR值到缓存 ,6B
if( OPCR_flag)
{
for(z = 0; z < 6; z++)
{
buf[z] = fgetc(fp);
}
OPCR_base[0] = (buf[0] & 0x80) ? 1 : 0;
OPCR_base[1] = (buf[0] << 25) | (buf[1] << 17) | (buf[2] << 9) | (buf[3] << 1) | ((buf[4] & 0x80) >> 7);
OPCR_ext = ((buf[4] & 0x01) << 8) | buf[5];
OPCR_OK = 1;
}
else
fseek(fp, 6, 1);
if( splicing_point_flag ) // 1B
{
//读取splice_countdown 数据
splice_countdown = fgetc(fp);
SP_CD_OK = 1;
}
else
fseek(fp, 1, 1);
//文件指针移到下一个TS包起始位置
fseek(fp, (0xbb - 18), 1); //0 top position, 1 current position, 2 button position
}
else
fseek(fp, (0xbb - 5), 1); //0 top position, 1 current position, 2 button position
return 1;
}
//显示特定数据包内容
void TS_PACKET::Display_Packet_Info(int i)
{
cout << "-----------------------------------------------------------------------" << endl << endl;
cout << "TS Packet : " << dec << i << endl;
cout << "Item --- Data" << endl;
cout << "sync_byte : " << hex << sync_byte << endl;
//cout << "transport_error_indicator : " << transport_error_indicator << endl;
//cout << "payload_unit_start_indicator : " << payload_unit_start_indicator << endl;
//cout << "transport_priority : " << transport_priority << endl;
cout << "PID : " << PID << endl;
//cout << "transport_scrambling_control : " << transport_scrambling_control << endl;
//cout << "adaptation_field_control : " << adaptation_field_control << endl;
//cout << "continuity_counter : " << continuity_counter << endl;
//cout << "adaptation_field_length : " << adaptation_field_length << endl;
//cout << "discontinuity_indicator : " << discontinuity_indicator << endl;
//cout << "random_access_indicator : " << random_access_indicator << endl;
//cout << "elementary_stream_priority_indicator : " << elementary_stream_priority_indicator << endl;
cout << "PCR_flag : " << PCR_flag << endl;
cout << "OPCR_flag : " << OPCR_flag << endl;
//cout << "splicing_point_flag : " << splicing_point_flag << endl;
//cout << "transport_private_data_flag : " << transport_private_data_flag << endl;
//cout << "adaptation_field_extension_flag : " << adaptation_field_extension_flag << endl;
if(PCR_OK)
{
PCR_OK = 0;
//output PCR
cout.setf(ios::showbase);
cout << "PCR_base : " << hex<< PCR_base[0];
cout.unsetf(ios::showbase);
cout<<PCR_base[1] << endl;
cout << "PCR_reseverd : " << hex<< PCR_reserved << endl;
cout << "PCR_ext : " << hex<< PCR_ext << endl;
}
if(OPCR_OK)
{
OPCR_OK = 0;
//output OPCR
cout.setf(ios::showbase);
cout << "OPCR_base : " << hex<< OPCR_base[0];
cout.unsetf(ios::showbase);
cout << OPCR_base[1]<< endl;
cout << "OPCR_reseverd : " << hex<< OPCR_reserved << endl;
cout << "OPCR_ext : " << hex<< OPCR_ext << endl;
}
//output splice_countdown
if(SP_CD_OK)
{
SP_CD_OK = 0;
cout << "splice_countdown: " << splice_countdown << endl;
}
}
void TS_PACKET::Find_PCR_Code(FILE * fp)
{
int i = 0, count = 0;
do{
if(Process_Packet(fp))
{
if(PCR_OK || OPCR_OK)
{
count ++;
if(count == 20)
break;
Display_Packet_Info(i);
}
}
else
{
cout<<"Red Transport Packet Fail!"<<endl;
return;
}
i++;
}while(!feof(fp));
}
//fiel: main.cpp
#include <iostream>
#include "ts_struct.h"
using namespace std;
int main(){
TS_PACKET ts;
FILE * fp;
fp = fopen("ysgq.trp","rb");
if(fp != NULL)
cout<<"File open success!"<<endl;
else{
cout<<"File open fail!"<<endl;
exit(0);
}
ts.Find_PCR_Code(fp);
fclose(fp);
return 0;
}
