751 lines
22 KiB
C++
751 lines
22 KiB
C++
#include "ts_stream.h"
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#include "defines.h"
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#include "h264.h"
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#include "h265.h"
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#include "nal.h"
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#include "mp4_generic.h"
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#include <sys/stat.h>
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namespace TS {
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Stream::Stream(bool _threaded){
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threaded = _threaded;
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if (threaded){
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globalSem.open("MstTSInputLock", O_CREAT | O_RDWR, ACCESSPERMS, 1);
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if (!globalSem) {
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FAIL_MSG("Creating semaphore failed: %s", strerror(errno));
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threaded = false;
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DEBUG_MSG(DLVL_FAIL, "Creating semaphore failed: %s", strerror(errno));
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return;
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}
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}
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}
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Stream::~Stream(){
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if (threaded){
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globalSem.unlink();
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}
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}
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void Stream::parse(char * newPack, unsigned long long bytePos) {
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Packet newPacket;
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newPacket.FromPointer(newPack);
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parse(newPacket, bytePos);
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}
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void Stream::clear(){
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if (threaded){
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globalSem.wait();
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}
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pesStreams.clear();
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pesPositions.clear();
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outPackets.clear();
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if (threaded){
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globalSem.post();
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}
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}
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void Stream::add(char * newPack, unsigned long long bytePos) {
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Packet newPacket;
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newPacket.FromPointer(newPack);
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add(newPacket, bytePos);
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}
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void Stream::add(Packet & newPack, unsigned long long bytePos) {
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if (threaded){
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globalSem.wait();
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}
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int tid = newPack.getPID();
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if ((pidToCodec.count(tid) || tid == 0 || newPack.isPMT()) && (pesStreams[tid].size() || newPack.getUnitStart())){
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pesStreams[tid].push_back(newPack);
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pesPositions[tid].push_back(bytePos);
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}
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if (threaded){
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globalSem.post();
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}
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}
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bool Stream::isDataTrack(unsigned long tid){
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if (tid == 0){
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return false;
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}
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if (threaded){
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globalSem.wait();
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}
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bool result = !pmtTracks.count(tid);
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if (threaded){
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globalSem.post();
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}
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return result;
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}
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void Stream::parse(unsigned long tid) {
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if (threaded){
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globalSem.wait();
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}
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if (!pesStreams.count(tid) || pesStreams[tid].size() == 0){
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if (threaded){
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globalSem.post();
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}
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return;
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}
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std::deque<Packet> & trackPackets = pesStreams[tid];
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if (threaded){
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globalSem.post();
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}
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//Handle PAT packets
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if (tid == 0){
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///\todo Keep track of updates in PAT instead of keeping only the last PAT as a reference
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if (threaded){
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globalSem.wait();
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}
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associationTable = trackPackets.back();
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associationTable.parsePIDs();
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lastPAT = Util::bootSecs();
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if (threaded){
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globalSem.post();
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}
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int pmtCount = associationTable.getProgramCount();
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for (int i = 0; i < pmtCount; i++){
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pmtTracks.insert(associationTable.getProgramPID(i));
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}
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if (threaded){
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globalSem.wait();
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}
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pesStreams.erase(0);
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pesPositions.erase(0);
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if (threaded){
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globalSem.post();
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}
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return;
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}
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//Ignore conditional access packets. We don't care.
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if (tid == 1){
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return;
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}
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//Handle PMT packets
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if (pmtTracks.count(tid)){
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///\todo Keep track of updates in PMT instead of keeping only the last PMT per program as a reference
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if (threaded){
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globalSem.wait();
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}
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mappingTable[tid] = trackPackets.back();
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lastPMT[tid] = Util::bootSecs();
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if (threaded){
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globalSem.post();
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}
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ProgramMappingEntry entry = mappingTable[tid].getEntry(0);
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while (entry){
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unsigned long pid = entry.getElementaryPid();
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unsigned long sType = entry.getStreamType();
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switch(sType){
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case H264:
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case AAC:
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case H265:
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case AC3:
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case ID3:
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pidToCodec[pid] = sType;
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if (sType == ID3){
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metaInit[pid] = std::string(entry.getESInfo(), entry.getESInfoLength());
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}
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break;
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default:
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break;
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}
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entry.advance();
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}
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if (threaded){
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globalSem.wait();
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}
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pesStreams.erase(tid);
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pesPositions.erase(tid);
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if (threaded){
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globalSem.post();
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}
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return;
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}
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if (threaded){
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globalSem.wait();
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}
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bool parsePes = false;
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int packNum = 1;
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std::deque<Packet> & inStream = pesStreams[tid];
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std::deque<Packet>::iterator curPack = inStream.begin();
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curPack++;
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while (curPack != inStream.end() && !curPack->getUnitStart()){
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curPack++;
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packNum++;
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}
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if (curPack != inStream.end()){
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parsePes = true;
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}
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if (threaded){
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globalSem.post();
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}
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if (parsePes){
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parsePES(tid);
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}
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}
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void Stream::parse(Packet & newPack, unsigned long long bytePos) {
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add(newPack, bytePos);
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int tid = newPack.getPID();
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parse(tid);
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}
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bool Stream::hasPacketOnEachTrack() const {
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if (threaded){
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globalSem.wait();
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}
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if (!pidToCodec.size() || pidToCodec.size() != outPackets.size()){
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if (threaded){
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globalSem.post();
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}
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return false;
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}
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for (std::map<unsigned long, unsigned long>::const_iterator it = pidToCodec.begin(); it != pidToCodec.end(); it++){
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if (!hasPacket(it->first)){
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if (threaded){
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globalSem.post();
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}
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return false;
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}
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}
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if (threaded){
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globalSem.post();
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}
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return true;
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}
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bool Stream::hasPacket(unsigned long tid) const {
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if (threaded){
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globalSem.wait();
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}
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if (!pesStreams.count(tid)){
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if (threaded){
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globalSem.post();
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}
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return false;
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}
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if (outPackets.count(tid) && outPackets.at(tid).size()){
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if (threaded){
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globalSem.post();
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}
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return true;
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}
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std::deque<Packet>::const_iterator curPack = pesStreams.at(tid).begin();
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curPack++;
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while (curPack != pesStreams.at(tid).end() && !curPack->getUnitStart()){
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curPack++;
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}
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if (curPack != pesStreams.at(tid).end()){
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if (threaded){
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globalSem.post();
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}
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return true;
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}
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if (threaded){
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globalSem.post();
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}
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return false;
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}
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unsigned long long decodePTS(const char * data){
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unsigned long long time;
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time = ((data[0] >> 1) & 0x07);
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time <<= 15;
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time |= ((int)data[1] << 7) | ((data[2] >> 1) & 0x7F);
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time <<= 15;
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time |= ((int)data[3] << 7) | ((data[4] >> 1) & 0x7F);
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time /= 90;
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return time;
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}
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void Stream::parsePES(unsigned long tid){
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if (!pidToCodec.count(tid)){return;}//skip unknown codecs
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if (threaded){
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globalSem.wait();
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}
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std::deque<Packet> & inStream = pesStreams[tid];
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std::deque<unsigned long long> & inPositions = pesPositions[tid];
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if (inStream.size() == 1){
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if (threaded){
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globalSem.post();
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}
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return;
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}
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//Find number of packets before unit Start
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int packNum = 1;
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std::deque<Packet>::iterator curPack = inStream.begin();
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curPack++;
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while (curPack != inStream.end() && !curPack->getUnitStart()){
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curPack++;
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packNum++;
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}
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if (curPack == inStream.end()){
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if (threaded){
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globalSem.post();
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}
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return;
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}
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unsigned long long bPos = inPositions.front();
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//Create a buffer for the current PES, and remove it from the pesStreams buffer.
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int paySize = 0;
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curPack = inStream.begin();
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for (int i = 0; i < packNum; i++){
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paySize += curPack->getPayloadLength();
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curPack++;
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}
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VERYHIGH_MSG("Parsing PES for track %lu, length %i", tid, paySize);
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char * payload = (char*)malloc(paySize);
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paySize = 0;
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curPack = inStream.begin();
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int lastCtr = curPack->getContinuityCounter() - 1;
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for (int i = 0; i < packNum; i++){
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if (curPack->getContinuityCounter() == lastCtr){curPack++; continue;}
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if (curPack->getContinuityCounter() - lastCtr != 1 && curPack->getContinuityCounter()){
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INFO_MSG("Parsing a pes on track %d, missed %d packets", tid, curPack->getContinuityCounter() - lastCtr - 1);
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}
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lastCtr = curPack->getContinuityCounter();
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memcpy(payload + paySize, curPack->getPayload(), curPack->getPayloadLength());
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paySize += curPack->getPayloadLength();
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curPack++;
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}
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inStream.erase(inStream.begin(), curPack);
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inPositions.erase(inPositions.begin(), inPositions.begin() + packNum);
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if (threaded){
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globalSem.post();
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}
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//Parse the PES header
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int offset = 0;
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while(offset < paySize){
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const char * pesHeader = payload + offset;
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//Check for large enough buffer
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if ((paySize - offset) < 9 || (paySize - offset) < 9 + pesHeader[8]){
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INFO_MSG("Not enough data on track %lu (%d / %d), discarding remainder of data", tid, paySize - offset, 9 + pesHeader[8]);
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break;
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}
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//Check for valid PES lead-in
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if(pesHeader[0] != 0 || pesHeader[1] != 0x00 || pesHeader[2] != 0x01){
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INFO_MSG("Invalid PES Lead in on track %lu, discarding it", tid);
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break;
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}
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//Read the payload size.
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//Note: if the payload size is 0, then we assume the pes packet will cover the entire TS Unit.
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//Note: this is technically only allowed for video pes streams.
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unsigned long long realPayloadSize = (((int)pesHeader[4] << 8) | pesHeader[5]);
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if (!realPayloadSize){
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realPayloadSize = paySize;
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}
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if (pidToCodec[tid] == AAC || pidToCodec[tid] == MP3 || pidToCodec[tid] == AC3){
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realPayloadSize -= (3 + pesHeader[8]);
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}else{
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realPayloadSize -= (9 + pesHeader[8]);
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}
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//Read the metadata for this PES Packet
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///\todo Determine keyframe-ness
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unsigned int timeStamp = 0;
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unsigned int timeOffset = 0;
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unsigned int pesOffset = 9;
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if ((pesHeader[7] >> 6) & 0x02){//Check for PTS presence
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timeStamp = decodePTS(pesHeader + pesOffset);
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pesOffset += 5;
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if (((pesHeader[7] & 0xC0) >> 6) & 0x01){//Check for DTS presence (yes, only if PTS present)
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timeOffset = timeStamp;
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timeStamp = decodePTS(pesHeader + pesOffset);
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pesOffset += 5;
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timeOffset -= timeStamp;
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}
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}
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if (pesHeader[7] & 0x20){ //ESCR - ignored
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pesOffset += 6;
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}
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if (pesHeader[7] & 0x10){ //ESR - ignored
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pesOffset += 3;
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}
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if (pesHeader[7] & 0x08){ //trick mode - ignored
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pesOffset += 1;
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}
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if (pesHeader[7] & 0x04){//additional copy - ignored
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pesOffset += 1;
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}
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if (pesHeader[7] & 0x02){ //crc - ignored
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pesOffset += 2;
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}
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if (paySize - offset - pesOffset < realPayloadSize){
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INFO_MSG("Not enough data left on track %lu.", tid);
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break;
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}
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char * pesPayload = payload + offset + pesOffset;
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//Create a new (empty) DTSC Packet at the end of the buffer
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if (pidToCodec[tid] == AAC){
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//Parse all the ADTS packets
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unsigned long offsetInPes = 0;
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unsigned long samplesRead = 0;
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if (threaded){
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globalSem.wait();
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}
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while (offsetInPes < realPayloadSize){
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aac::adts adtsPack(pesPayload + offsetInPes, realPayloadSize - offsetInPes);
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if (adtsPack.getFrequency() && adtsPack.getPayloadSize()){
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if (!adtsInfo.count(tid) || !adtsInfo[tid].sameHeader(adtsPack)){
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adtsInfo[tid] = adtsPack;
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}
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outPackets[tid].push_back(DTSC::Packet());
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outPackets[tid].back().genericFill(timeStamp + ((samplesRead * 1000) / adtsPack.getFrequency()), timeOffset, tid, adtsPack.getPayload(), adtsPack.getPayloadSize(), bPos, 0);
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}
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samplesRead += adtsPack.getSampleCount();
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offsetInPes += adtsPack.getHeaderSize() + adtsPack.getPayloadSize();
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}
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if (threaded){
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globalSem.post();
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}
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}
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if (pidToCodec[tid] == ID3 || pidToCodec[tid] == AC3){
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if (threaded){
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globalSem.wait();
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}
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outPackets[tid].push_back(DTSC::Packet());
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outPackets[tid].back().genericFill(timeStamp, timeOffset, tid, pesPayload, realPayloadSize, bPos, 0);
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if (threaded){
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globalSem.post();
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}
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}
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if (pidToCodec[tid] == H264 || pidToCodec[tid] == H265){
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//Convert from annex b
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char * parsedData = (char*)malloc(realPayloadSize * 2);
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bool isKeyFrame = false;
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unsigned long parsedSize = nalu::fromAnnexB(pesPayload, realPayloadSize, parsedData);
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std::deque<nalu::nalData> nalInfo;
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if (pidToCodec[tid] == H264) {
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nalInfo = h264::analysePackets(parsedData, parsedSize);
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}
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if (pidToCodec[tid] == H265){
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nalInfo = h265::analysePackets(parsedData, parsedSize);
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}
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int dataOffset = 0;
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for (std::deque<nalu::nalData>::iterator it = nalInfo.begin(); it != nalInfo.end(); it++){
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if (pidToCodec[tid] == H264){
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switch (it->nalType){
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case 0x05: {
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isKeyFrame = true;
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break;
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}
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case 0x07: {
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if (threaded){
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globalSem.wait();
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}
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spsInfo[tid] = std::string(parsedData + dataOffset + 4, it->nalSize);
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if (threaded){
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globalSem.post();
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}
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break;
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}
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case 0x08: {
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if (threaded){
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globalSem.wait();
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}
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ppsInfo[tid] = std::string(parsedData + dataOffset + 4, it->nalSize);
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if (threaded){
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globalSem.post();
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}
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break;
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}
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default: break;
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}
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}
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if (pidToCodec[tid] == H265){
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switch (it->nalType){
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case 2: case 3: //TSA Picture
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case 4: case 5: //STSA Picture
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case 6: case 7: //RADL Picture
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case 8: case 9: //RASL Picture
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case 16: case 17: case 18: //BLA Picture
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case 19: case 20: //IDR Picture
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case 21: { //CRA Picture
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isKeyFrame = true;
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break;
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}
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case 32:
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case 33:
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case 34: {
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if (threaded){
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globalSem.wait();
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}
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hevcInfo[tid].addUnit(parsedData + dataOffset);
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if (threaded){
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globalSem.post();
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}
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break;
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}
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default: break;
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}
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}
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dataOffset += 4 + it->nalSize;
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}
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if (threaded){
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globalSem.wait();
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}
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outPackets[tid].push_back(DTSC::Packet());
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outPackets[tid].back().genericFill(timeStamp, timeOffset, tid, parsedData, parsedSize, bPos, isKeyFrame);
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if (threaded){
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globalSem.post();
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}
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free(parsedData);
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}
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//We are done with the realpayload size, reverse calculation so we know the correct offset increase.
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if (pidToCodec[tid] == AAC){
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realPayloadSize += (3 + pesHeader[8]);
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}else{
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realPayloadSize += (9 + pesHeader[8]);
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}
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offset += realPayloadSize + 6;
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}
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free(payload);
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}
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void Stream::getPacket(unsigned long tid, DTSC::Packet & pack) {
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pack.null();
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if (!hasPacket(tid)){
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ERROR_MSG("Trying to obtain a packet on track %lu, but no full packet is available", tid);
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return;
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}
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if (threaded){
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globalSem.wait();
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}
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bool packetReady = outPackets.count(tid) && outPackets[tid].size();
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if (threaded){
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globalSem.post();
|
|
}
|
|
|
|
if (!packetReady){
|
|
parse(tid);
|
|
}
|
|
|
|
if (threaded){
|
|
globalSem.wait();
|
|
}
|
|
packetReady = outPackets.count(tid) && outPackets[tid].size();
|
|
if (threaded){
|
|
globalSem.post();
|
|
}
|
|
|
|
if (!packetReady){
|
|
ERROR_MSG("Obtaining a packet on track %lu failed", tid);
|
|
return;
|
|
}
|
|
|
|
if (threaded){
|
|
globalSem.wait();
|
|
}
|
|
pack = outPackets[tid].front();
|
|
outPackets[tid].pop_front();
|
|
|
|
if (!outPackets[tid].size()){
|
|
outPackets.erase(tid);
|
|
}
|
|
|
|
if (threaded){
|
|
globalSem.post();
|
|
}
|
|
}
|
|
|
|
void Stream::getEarliestPacket(DTSC::Packet & pack){
|
|
if (threaded){
|
|
globalSem.wait();
|
|
}
|
|
pack.null();
|
|
if (!hasPacketOnEachTrack()){
|
|
if (threaded){
|
|
globalSem.post();
|
|
}
|
|
return;
|
|
}
|
|
|
|
unsigned long packTime = 0xFFFFFFFFull;
|
|
unsigned long packTrack = 0;
|
|
|
|
for (std::map<unsigned long, std::deque<DTSC::Packet> >::iterator it = outPackets.begin(); it != outPackets.end(); it++){
|
|
if (it->second.front().getTime() < packTime){
|
|
packTrack = it->first;
|
|
packTime = it->second.front().getTime();
|
|
}
|
|
}
|
|
if (threaded){
|
|
globalSem.post();
|
|
}
|
|
|
|
getPacket(packTrack, pack);
|
|
}
|
|
|
|
void Stream::initializeMetadata(DTSC::Meta & meta, unsigned long tid) {
|
|
if (threaded){
|
|
globalSem.wait();
|
|
}
|
|
for (std::map<unsigned long, unsigned long>::const_iterator it = pidToCodec.begin(); it != pidToCodec.end(); it++){
|
|
if (tid && it->first != tid){
|
|
continue;
|
|
}
|
|
if (meta.tracks.count(it->first) && meta.tracks[it->first].codec.size()){continue;}
|
|
switch (it->second){
|
|
case H264: {
|
|
if (!spsInfo.count(it->first) || !ppsInfo.count(it->first)){
|
|
MEDIUM_MSG("Aborted meta fill for h264 track %lu: no SPS/PPS", it->first);
|
|
continue;
|
|
}
|
|
meta.tracks[it->first].type = "video";
|
|
meta.tracks[it->first].codec = "H264";
|
|
meta.tracks[it->first].trackID = it->first;
|
|
std::string tmpBuffer = spsInfo[it->first];
|
|
h264::sequenceParameterSet sps(spsInfo[it->first].data(), spsInfo[it->first].size());
|
|
h264::SPSMeta spsChar = sps.getCharacteristics();
|
|
meta.tracks[it->first].width = spsChar.width;
|
|
meta.tracks[it->first].height = spsChar.height;
|
|
meta.tracks[it->first].fpks = spsChar.fps * 1000;
|
|
MP4::AVCC avccBox;
|
|
avccBox.setVersion(1);
|
|
avccBox.setProfile(spsInfo[it->first][1]);
|
|
avccBox.setCompatibleProfiles(spsInfo[it->first][2]);
|
|
avccBox.setLevel(spsInfo[it->first][3]);
|
|
avccBox.setSPSNumber(1);
|
|
avccBox.setSPS(spsInfo[it->first]);
|
|
avccBox.setPPSNumber(1);
|
|
avccBox.setPPS(ppsInfo[it->first]);
|
|
meta.tracks[it->first].init = std::string(avccBox.payload(), avccBox.payloadSize());
|
|
}
|
|
break;
|
|
case H265: {
|
|
if (!hevcInfo.count(it->first) || !hevcInfo[it->first].haveRequired()){
|
|
MEDIUM_MSG("Aborted meta fill for hevc track %lu: no info nal unit", it->first);
|
|
continue;
|
|
}
|
|
meta.tracks[it->first].type = "video";
|
|
meta.tracks[it->first].codec = "HEVC";
|
|
meta.tracks[it->first].trackID = it->first;
|
|
meta.tracks[it->first].init = hevcInfo[it->first].generateHVCC();
|
|
}
|
|
break;
|
|
case ID3: {
|
|
meta.tracks[it->first].type = "meta";
|
|
meta.tracks[it->first].codec = "ID3";
|
|
meta.tracks[it->first].trackID = it->first;
|
|
meta.tracks[it->first].init = metaInit[it->first];
|
|
}
|
|
break;
|
|
case AC3: {
|
|
meta.tracks[it->first].type = "audio";
|
|
meta.tracks[it->first].codec = "AC3";
|
|
meta.tracks[it->first].trackID = it->first;
|
|
meta.tracks[it->first].size = 16;
|
|
///\todo Fix these 2 values
|
|
meta.tracks[it->first].rate = 0;
|
|
meta.tracks[it->first].channels = 0;
|
|
}
|
|
break;
|
|
case AAC: {
|
|
meta.tracks[it->first].type = "audio";
|
|
meta.tracks[it->first].codec = "AAC";
|
|
meta.tracks[it->first].trackID = it->first;
|
|
meta.tracks[it->first].size = 16;
|
|
meta.tracks[it->first].rate = adtsInfo[it->first].getFrequency();
|
|
meta.tracks[it->first].channels = adtsInfo[it->first].getChannelCount();
|
|
char audioInit[2];//5 bits object type, 4 bits frequency index, 4 bits channel index
|
|
audioInit[0] = ((adtsInfo[it->first].getAACProfile() & 0x1F) << 3) | ((adtsInfo[it->first].getFrequencyIndex() & 0x0E) >> 1);
|
|
audioInit[1] = ((adtsInfo[it->first].getFrequencyIndex() & 0x01) << 7) | ((adtsInfo[it->first].getChannelConfig() & 0x0F) << 3);
|
|
meta.tracks[it->first].init = std::string(audioInit, 2);
|
|
}
|
|
break;
|
|
}
|
|
MEDIUM_MSG("Initialized track %lu as %s %s", it->first, meta.tracks[it->first].codec.c_str(), meta.tracks[it->first].type.c_str());
|
|
}
|
|
if (threaded){
|
|
globalSem.post();
|
|
}
|
|
}
|
|
|
|
std::set<unsigned long> Stream::getActiveTracks() {
|
|
if (threaded){
|
|
globalSem.wait();
|
|
}
|
|
std::set<unsigned long> result;
|
|
//Track 0 is always active
|
|
result.insert(0);
|
|
//IF PAT updated in the last 5 seconds, check for contents
|
|
if (Util::bootSecs() - lastPAT < 5){
|
|
int pmtCount = associationTable.getProgramCount();
|
|
//For each PMT
|
|
for (int i = 0; i < pmtCount; i++){
|
|
int pid = associationTable.getProgramPID(i);
|
|
//Add PMT track
|
|
result.insert(pid);
|
|
//IF PMT updated in last 5 seconds, check for contents
|
|
if (Util::bootSecs() - lastPMT[pid] < 5){
|
|
ProgramMappingEntry entry = mappingTable[pid].getEntry(0);
|
|
//Add all tracks in PMT
|
|
while (entry){
|
|
switch(entry.getStreamType()){
|
|
case H264:
|
|
case AAC:
|
|
case H265:
|
|
case AC3:
|
|
case ID3:
|
|
result.insert(entry.getElementaryPid());
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
entry.advance();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (threaded){
|
|
globalSem.post();
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void Stream::eraseTrack(unsigned long tid){
|
|
if (threaded){
|
|
globalSem.wait();
|
|
}
|
|
pesStreams.erase(tid);
|
|
pesPositions.erase(tid);
|
|
outPackets.erase(tid);
|
|
if (threaded){
|
|
globalSem.post();
|
|
}
|
|
}
|
|
}
|