解析TS流PAT和PMT-代码

#includestdio.h#includestdlib.h#includestring.h#definets_path/home/huohuo/huangwork/work/birds.ts//TS文件的绝对路径voidRead_Ts_Packet(FILE*file_handle,unsignedchar*packet_buf,intlen);//读一个TS流的packetintparse_TS(unsignedchar*buffer,intFileSize);//分析TS流，并找出PAT的PID和PAT的tablevoidparse_PAT(unsignedchar*buffer,intlen);//分析PAT，并找出所含频道的数目和PMT的PIDvoidpronum_pmtid_printf();//打印PMT的PIDunsignedchar*Find_PMT(unsignedshortpmt_pid);//找出PMT的tablevoidparse_PMT(unsignedchar*buffer,intlen,unsignedshortpmt_pid);//解析PMT，找出其中的Video和Audio的PIDvoidprintf_program_list();//打印PMTtable中包含的stream的类型和PIDunsignedchar*Find_video_audio(unsignedshortprogram_pid,unsignedchartype);//找出Video或者Audio的tabletypedefstruct{unsignedshortprogram_num;//program'snumunsignedshortpmt_pid;//}PROGRAM;typedefstruct{unsignedcharstream_type;unsignedshortelementary_pid;}PRO_LIST;PROGRAMprograms[10]={{0,0}};//用来存储PMT的PID和数量unsignedintnum=0;//totalprogramPRO_LISTprogram_list[10]={{0,0}};//用来存储PMT中stream的类型和PIDunsignedintprogram_list_num=0;FILE*file_handle;//指向TS流的指针unsignedintFileSize=0;intmain(){unsignedcharbuffer[188]={0};unsignedchar*pmt_buffer,*Video_or_Audio_buffer;unsignedinti=0,j=0,ret=0;pmt_buffer=(unsignedchar*)malloc(sizeof(char)*188);//给buffer分配空间memset(pmt_buffer,0,sizeof(char)*188);//清空bufferVideo_or_Audio_buffer=(unsignedchar*)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(openfileerror!\n);return0;}elseprintf(openfilesuccess!\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(filesize=%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(findPATbegin--------\n);for(i=0;iFileSize/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'spacket，并打印找到的PAT’stable。如果解析成功即找到PAT，则返回1，否则返回0if(ret==1){break;}else{printf(ThereisnoPATtable!\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(findPMTbegin--------\n);for(i=0;inum;i++){pmt_buffer=Find_PMT(programs[i].pmt_pid);//根据PMT的PID找到PMT'stableprintf(PMTtable--------\n);for(j=0;j188;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(findAudioandVideobegin--------\n);for(i=0;iprogram_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(theprogram'sPIDis0x%x\n,program_list[i].elementary_pid);printf(theprogram'sTable---------\n);for(j=0;j188;j++){printf(0x%x,Video_or_Audio_buffer[j]);//打印elementary'stable}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);return1;}/***************************************************readoneTSpacket'sdata**************************************************/voidRead_Ts_Packet(FILE*file_handle,unsignedchar*packet_buf,intlen){fread(packet_buf,188,1,file_handle);}intparse_TS(unsignedchar*buffer,intFileSize){unsignedchar*temp=buffer;shortpat_pid;inti=0;if(buffer[0]!=0x47){printf(it'snotatspacket!\n);return0;}while(tempbuffer+FileSize){pat_pid=(temp[1]&0x1f)8|temp[2];if(pat_pid!=0)printf(findingPATtable....\n);else{printf(alreadyfindthePATtable\n);printf(pat_pid=0x%x\n,pat_pid);printf(pattable-------\n);for(i=0;i=187;i++){printf(0x%x,buffer[i]);}printf(\n);return1;}temp=temp+188;}return0;}/********************************************************parsePATtable,getthePMT'sPID*********************************************************/voidparse_PAT(unsignedchar*buffer,intlen){unsignedchar*temp,*p;charadaptation_control;intadaptation_length,i=0;unsignedshortsection_length,prg_No,PMT_Pid;temp=buffer;adaptation_control=temp[3]&0x30;if(adaptation_control==0x10)temp=buffer+4+1;elseif(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(tempp-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_pidisox%x\n,PMT_Pid);num++;temp=temp+4;}}}voidpronum_pmtid_printf(){unsignedinti;printf(PATtable'sprogram_numandPMT'sPID:\n);for(i=0;inum;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);}}voidprintf_program_list(){unsignedinti;printf(AllPMTTable'sprogramlist:\n);for(i=0;iprogram_list_num;i++){printf(stream_type=0x%x,elementary_