解析TS流PAT和PMT 代码

#include<stdio.h>#include<stdlib.h>#include<string.h>#define ts_path "/home/huohuo/huangwork/work/birds.ts" //TS文件的绝对路径void Read_Ts_Packet(FILE *file_handle,unsigned char *packet_buf,int len); //读一个TS流的packetint parse_TS(unsigned char *buffer,int FileSize); //分析TS流，并找出PA T的PID和PAT的tablevoid parse_PAT(unsigned char *buffer,int len); //分析PA T，并找出所含频道的数目和PMT的PIDvoid pronum_pmtid_printf(); //打印PMT的PID unsigned char* Find_PMT(unsigned short pmt_pid); //找出PMT的tablevoid parse_PMT(unsigned char *buffer,int len,unsigned short pmt_pid); //解析PMT，找出其中的Video和Audio的PIDvoid printf_program_list(); //打印PMT table中包含的stream的类型和PIDunsigned char* Find_video_audio(unsigned short program_pid,unsigned char type); //找出Video或者Audio的tabletypedef struct{unsigned short program_num; //program's numunsigned short pmt_pid; //}PROGRAM;typedef struct{unsigned char stream_type;unsigned short elementary_pid;}PRO_LIST;PROGRAM programs[10] = {{0,0}}; //用来存储PMT的PID和数量unsigned int num = 0; //total programPRO_LIST program_list[10] = {{0,0}}; //用来存储PMT中stream的类型和PIDunsigned int program_list_num = 0;FILE *file_handle; //指向TS流的指针unsigned int FileSize = 0;int main(){unsigned char buffer[188] = {0};unsigned char *pmt_buffer, *Video_or_Audio_buffer;unsigned int i=0,j=0,ret=0;pmt_buffer = (unsigned char*)malloc(sizeof(char)*188); //给buffer分配空间memset(pmt_buffer,0,sizeof(char)*188);//清空bufferVideo_or_Audio_buffer = (unsigned char*)malloc(sizeof(char)*188);memset(Video_or_Audio_buffer,0,sizeof(char)*188);file_handle = fopen(ts_path,"rb+"); //以二进制方式打开TS文件if(NULL == file_handle) //判断是否打开文件{perror("fopen");printf("open file error!\n");return 0;}elseprintf("open file success!\n");fseek(file_handle,0,SEEK_END); //指针file_handle将以SEEK_END位置偏移0个位置，即将指针移动到文件尾FileSize = ftell(file_handle); // 计算file_handle到文件头的偏移字节数，即计算文件的大小printf("file size = %d\n",FileSize);rewind(file_handle); // equivalent (void) feek(file_handle,0L,SEEK_SET) 将file_handle 指针移动到文件头位置printf("find PAT begin-------->\n");for(i=0;i<FileSize/188;i++){Read_Ts_Packet(file_handle,buffer,188); //读TS的packet函数，每次读188个字节到bufferret = parse_TS(buffer,188); //解析188个字节的TS's packet，并打印找到的PA T’s table。

如果解析成功即找到PA T，则返回1，否则返回0if(ret == 1){break;}else{printf("There is no PAT table!\n");}}if(ret == 1){parse_PAT(buffer,188); //解析PAT，并找出所含频道的数目和PMT的PID }pronum_pmtid_printf(); //打印PMT的PIDrewind(file_handle);printf("find PMT begin -------->\n");for(i=0;i<num;i++){pmt_buffer = Find_PMT(programs[i].pmt_pid); //根据PMT的PID找到PMT's tableprintf("PMT table -------->\n");for(j=0;j<188;j++){printf("0x%x ",pmt_buffer[j]); //打印PMT}if(pmt_buffer){parse_PMT(pmt_buffer,188,programs[i].pmt_pid); //解析找到的PMT，得到Video、Audio等的PID}memset(pmt_buffer,0,sizeof(char)*188);printf("\n");}printf_program_list(); //打印elementary 流的PID和type。

rewind(file_handle);printf("find Audio and Video begin-------->\n");for(i=0;i<program_list_num;i++){Video_or_Audio_buffer = Find_video_audio(program_list[i].elementary_pid,program_list[i].stream_type); //根据PID找到elementary流printf("the program's PID is 0x%x\n",program_list[i].elementary_pid);printf("the program's Table --------->\n");for(j=0;j<188;j++){printf("0x%x ",Video_or_Audio_buffer[j]); //打印elementary's table }memset(Video_or_Audio_buffer,0,sizeof(char)*188);printf("\n");}free(pmt_buffer);free(Video_or_Audio_buffer);pmt_buffer = NULL;Video_or_Audio_buffer = NULL;fclose(file_handle);printf("\n");return 1;}/*************************************************** read one TS packet's data* *************************************************/void Read_Ts_Packet(FILE *file_handle,unsigned char *packet_buf,int len){fread(packet_buf,188,1,file_handle);}int parse_TS(unsigned char *buffer,int FileSize){unsigned char *temp = buffer;short pat_pid;int i = 0;if(buffer[0] != 0x47){printf("it's not a ts packet!\n");return 0;}while(temp < buffer + FileSize){pat_pid = (temp[1] & 0x1f)<<8 | temp[2];if(pat_pid != 0)printf("finding PAT table ....\n");else{printf("already find the PA T table\n");printf("pat_pid = 0x%x\n",pat_pid);printf("pat table ------->\n");for(i=0;i<=187;i++){printf("0x%x ",buffer[i]);}printf("\n");return 1;}temp = temp + 188;}return 0;}/******************************************************** parse PAT table, get the PMT's PID* ********************************************************/ void parse_PAT(unsigned char *buffer,int len){unsigned char *temp, *p;char adaptation_control;int adaptation_length,i=0;unsigned short section_length,prg_No,PMT_Pid;temp = buffer;adaptation_control = temp[3] & 0x30;if(adaptation_control == 0x10)temp = buffer + 4 + 1;else if (adaptation_control == 0x30){adaptation_length = buffer[4];temp = buffer + 4 + 1 +adaptation_length + 1; }else{return ;}section_length = (temp[1]&0x0f)<<8 | temp[2];p = temp + 1 +section_length;temp = temp + 8;while(temp < p - 4){prg_No = (temp[0]<<8) | (temp[1]);if(prg_No == 0){temp = temp + 4;continue;}else{PMT_Pid = (temp[2]&0x1f)<<8 | temp[3];programs[num].program_num = prg_No;programs[num].pmt_pid = PMT_Pid;// printf("pmt_pid is ox%x\n", PMT_Pid);num ++;temp = temp + 4;}}}void pronum_pmtid_printf(){unsigned int i;printf("PAT table's program_num and PMT's PID:\n");for(i=0;i<num;i++){printf("program_num = 0x%x (%d),PMT_Pid = 0x%x (%d)\n",programs[i].program_num,programs[i].program_num,programs[i].pmt_pid,programs[i].pmt_pid);}}void printf_program_list(){unsigned int i;printf("All PMT Table's program list: \n");for(i=0;i<program_list_num;i++){printf("stream_type = 0x%x, elementary_pid = 0x%x\n",program_list[i].stream_type,program_list[i].elementary_pid);}printf("\n");}unsigned char* Find_PMT(unsigned short pmt_pid){unsigned int i=0,j=0;int pid;unsigned char *buffer;buffer = (unsigned char *)malloc(sizeof(char)*188);memset(buffer,0,sizeof(char)*188);rewind(file_handle);for(j=0;j<FileSize/188;j++){Read_Ts_Packet(file_handle,buffer,188);if(buffer[0] != 0x47){printf("It's not TS packet !\n");}else{pid = (buffer[1] & 0x1f)<< 8 | buffer[2];if(pid == pmt_pid){printf("PMT Table already find!\n");return buffer;}elseprintf("finding PMT table.......\n");}}}unsigned char* Find_video_audio(unsigned short program_pid,unsigned char type) {unsigned int i = 0, j = 0 ;int pid;unsigned char *buffer;buffer = (unsigned char *)malloc(sizeof(char)*188);memset(buffer,0,sizeof(char)*188);rewind(file_handle);for(j=0;j<FileSize/188;j++){Read_Ts_Packet(file_handle,buffer,188);if(buffer[0] != 0x47){printf("It's not TS packet !\n");}else{pid = (buffer[1] & 0x1f)<< 8 | buffer[2];if(program_pid == pid){if(type == 0x02)printf("Find a program and this program is Video type!\n");else if(type == 0x03)printf("Find a program and this program is Audio type!\n");elseprintf("Find a program but this program is other type !\n");return buffer;}elseprintf("finding Video or Audio table.....\n ");}}}void parse_PMT(unsigned char *buffer,int len,unsigned short pmt_pid){unsigned char *temp, *p;char adaptation_control;int adaptation_length,i=0;int program_info_length;int ES_info_length;unsigned short section_length,pid;temp = buffer;adaptation_control = temp[3] & 0x30;if(adaptation_control == 0x10){temp = buffer + 4 +1;}else if (adaptation_control == 0x30){adaptation_length = buffer[4];temp = buffer + 5 + adaptation_length + 1;}elsereturn;section_length = (temp[1]&0x0f)<<8 | temp[2];p = temp + 1 + section_length;// temp = temp + 10;program_info_length = (temp[10] & 0x0f) << 8 | temp[11];temp = temp + 12 + program_info_length ;for(;temp < p - 4;){program_list[program_list_num].stream_type = temp[0],program_list[program_list_num].elementary_pid = (temp[1]&0x1f) << 8 | temp[2];ES_info_length = (temp[3]&0x0f) << 8 | temp[4];temp = temp + 4 + ES_info_length + 1;program_list_num ++ ;}}。