396 lines
17 KiB
C++
396 lines
17 KiB
C++
#include "mp4.h"
|
|
#include <sstream>
|
|
|
|
namespace MP4{
|
|
bool keyPartSort(keyPart i, keyPart j){
|
|
return (i.time < j.time);
|
|
}
|
|
|
|
std::string DTSC2MP4Converter::DTSCMeta2MP4Header(JSON::Value metaData){
|
|
std::stringstream header;
|
|
|
|
//ftyp box
|
|
/// \todo fill ftyp with non hardcoded values from file
|
|
MP4::FTYP ftypBox;
|
|
ftypBox.setMajorBrand(0x6D703431);//mp41
|
|
ftypBox.setMinorVersion(0);
|
|
ftypBox.setCompatibleBrands(0x69736f6d,0);
|
|
ftypBox.setCompatibleBrands(0x69736f32,1);
|
|
ftypBox.setCompatibleBrands(0x61766331,2);
|
|
ftypBox.setCompatibleBrands(0x6D703431,3);
|
|
header << std::string(ftypBox.asBox(),ftypBox.boxedSize());
|
|
|
|
uint64_t mdatSize = 0;
|
|
//std::vector<uint64_t> stcoOffsets;
|
|
//moov box
|
|
MP4::MOOV moovBox;
|
|
MP4::MVHD mvhdBox;
|
|
mvhdBox.setVersion(0);
|
|
mvhdBox.setCreationTime(0);
|
|
mvhdBox.setModificationTime(0);
|
|
mvhdBox.setTimeScale(1000);
|
|
mvhdBox.setRate(0x10000);
|
|
mvhdBox.setDuration(metaData["lastms"].asInt() + metaData["firstms"].asInt());
|
|
mvhdBox.setTrackID(0);
|
|
mvhdBox.setVolume(256);
|
|
mvhdBox.setMatrix(0x00010000,0);
|
|
mvhdBox.setMatrix(0,1);
|
|
mvhdBox.setMatrix(0,2);
|
|
mvhdBox.setMatrix(0,3);
|
|
mvhdBox.setMatrix(0x00010000,4);
|
|
mvhdBox.setMatrix(0,5);
|
|
mvhdBox.setMatrix(0,6);
|
|
mvhdBox.setMatrix(0,7);
|
|
mvhdBox.setMatrix(0x40000000,8);
|
|
moovBox.setContent(mvhdBox, 0);
|
|
|
|
//calculate interleaving
|
|
//putting all metadata in a huge vector 'keyParts'
|
|
keyParts.clear();
|
|
for (JSON::ObjIter trackIt = metaData["tracks"].ObjBegin(); trackIt != metaData["tracks"].ObjEnd(); trackIt++){
|
|
for (JSON::ArrIter keyIt = trackIt->second["keys"].ArrBegin(); keyIt != trackIt->second["keys"].ArrEnd(); keyIt++){
|
|
keyPart temp;
|
|
temp.trackID = trackIt->second["trackid"].asInt();
|
|
temp.size = (*keyIt)["size"].asInt();
|
|
temp.time = (*keyIt)["time"].asInt();
|
|
temp.len = (*keyIt)["len"].asInt();
|
|
temp.parts = (*keyIt)["parts"].asString();
|
|
keyParts.push_back(temp);
|
|
}
|
|
}
|
|
//sort by time on keyframes for interleaving
|
|
std::sort(keyParts.begin(), keyParts.end(), keyPartSort);
|
|
//next for loop is for debugging, delete when done
|
|
for (unsigned int i = 0; i < keyParts.size(); i++){
|
|
std::deque<long long int> parsedParts;
|
|
JSON::decodeVector(keyParts[i].parts, parsedParts);
|
|
std::cerr << "Header packet size: " << keyParts[i].size;
|
|
for (unsigned int o = 0; o < parsedParts.size(); o++){
|
|
std::cerr << " " << parsedParts[o];
|
|
}
|
|
std::cerr << std::endl;
|
|
}
|
|
|
|
//start arbitrary track addition for header
|
|
int boxOffset = 1;
|
|
for (JSON::ObjIter it = metaData["tracks"].ObjBegin(); it != metaData["tracks"].ObjEnd(); it++){
|
|
int timescale = 0;
|
|
MP4::TRAK trakBox;
|
|
MP4::TKHD tkhdBox;
|
|
//std::cerr << it->second["trackid"].asInt() << std::endl;
|
|
tkhdBox.setVersion(0);
|
|
tkhdBox.setFlags(15);
|
|
tkhdBox.setTrackID(it->second["trackid"].asInt());
|
|
tkhdBox.setDuration(it->second["lastms"].asInt() + it->second["firsms"].asInt());
|
|
|
|
if (it->second["type"].asString() == "video"){
|
|
tkhdBox.setWidth(it->second["width"].asInt() << 16);
|
|
tkhdBox.setHeight(it->second["height"].asInt() << 16);
|
|
tkhdBox.setVolume(0);
|
|
}else{
|
|
tkhdBox.setVolume(256);
|
|
tkhdBox.setAlternateGroup(1);
|
|
}
|
|
tkhdBox.setMatrix(0x00010000,0);
|
|
tkhdBox.setMatrix(0,1);
|
|
tkhdBox.setMatrix(0,2);
|
|
tkhdBox.setMatrix(0,3);
|
|
tkhdBox.setMatrix(0x00010000,4);
|
|
tkhdBox.setMatrix(0,5);
|
|
tkhdBox.setMatrix(0,6);
|
|
tkhdBox.setMatrix(0,7);
|
|
tkhdBox.setMatrix(0x40000000,8);
|
|
trakBox.setContent(tkhdBox, 0);
|
|
|
|
MP4::MDIA mdiaBox;
|
|
MP4::MDHD mdhdBox(0);/// \todo fix constructor mdhd in lib
|
|
mdhdBox.setCreationTime(0);
|
|
mdhdBox.setModificationTime(0);
|
|
//Calculating media time based on sampledelta. Probably cheating, but it works...
|
|
int tmpParts = 0;
|
|
for (JSON::ArrIter tmpIt = it->second["keys"].ArrBegin(); tmpIt != it->second["keys"].ArrEnd(); tmpIt++){
|
|
tmpParts += (*tmpIt)["partsize"].asInt();
|
|
}
|
|
timescale = ((double)(42 * tmpParts) / (it->second["lastms"].asInt() + it->second["firstms"].asInt())) * 1000;
|
|
mdhdBox.setTimeScale(timescale);
|
|
mdhdBox.setDuration(((it->second["lastms"].asInt() + it->second["firsms"].asInt()) * ((double)timescale / 1000)));
|
|
mdiaBox.setContent(mdhdBox, 0);
|
|
|
|
std::string tmpStr = it->second["type"].asString();
|
|
MP4::HDLR hdlrBox;/// \todo fix constructor hdlr in lib
|
|
if (tmpStr == "video"){
|
|
hdlrBox.setHandlerType(0x76696465);//vide
|
|
}else if (tmpStr == "audio"){
|
|
hdlrBox.setHandlerType(0x736F756E);//soun
|
|
}
|
|
hdlrBox.setName(it->first);
|
|
mdiaBox.setContent(hdlrBox, 1);
|
|
|
|
MP4::MINF minfBox;
|
|
if (tmpStr == "video"){
|
|
MP4::VMHD vmhdBox;
|
|
vmhdBox.setFlags(1);
|
|
minfBox.setContent(vmhdBox,0);
|
|
}else if (tmpStr == "audio"){
|
|
MP4::SMHD smhdBox;
|
|
minfBox.setContent(smhdBox,0);
|
|
}
|
|
MP4::DINF dinfBox;
|
|
MP4::DREF drefBox;/// \todo fix constructor dref in lib
|
|
drefBox.setVersion(0);
|
|
MP4::URL urlBox;
|
|
urlBox.setFlags(1);
|
|
drefBox.setDataEntry(urlBox,0);
|
|
dinfBox.setContent(drefBox,0);
|
|
minfBox.setContent(dinfBox,1);
|
|
|
|
MP4::STBL stblBox;
|
|
MP4::STSD stsdBox;
|
|
stsdBox.setVersion(0);
|
|
if (tmpStr == "video"){//boxname = codec
|
|
MP4::VisualSampleEntry vse;
|
|
std::string tmpStr2 = it->second["codec"];
|
|
if (tmpStr2 == "H264"){
|
|
vse.setCodec("avc1");
|
|
}
|
|
vse.setDataReferenceIndex(1);
|
|
vse.setWidth(it->second["width"].asInt());
|
|
vse.setHeight(it->second["height"].asInt());
|
|
MP4::AVCC avccBox;
|
|
avccBox.setPayload(it->second["init"].asString());
|
|
vse.setCLAP(avccBox);
|
|
stsdBox.setEntry(vse,0);
|
|
}else if(tmpStr == "audio"){//boxname = codec
|
|
MP4::AudioSampleEntry ase;
|
|
std::string tmpStr2 = it->second["codec"];
|
|
if (tmpStr2 == "AAC"){
|
|
ase.setCodec("mp4a");
|
|
ase.setDataReferenceIndex(1);
|
|
}
|
|
ase.setSampleRate(it->second["rate"].asInt());
|
|
ase.setChannelCount(it->second["channels"].asInt());
|
|
ase.setSampleSize(it->second["size"].asInt());
|
|
MP4::ESDS esdsBox;
|
|
esdsBox.setESDescriptorTypeLength(32+it->second["init"].asString().size());
|
|
esdsBox.setESID(2);
|
|
esdsBox.setStreamPriority(0);
|
|
esdsBox.setDecoderConfigDescriptorTypeLength(18+it->second["init"].asString().size());
|
|
esdsBox.setByteObjectTypeID(0x40);
|
|
esdsBox.setStreamType(5);
|
|
esdsBox.setReservedFlag(1);
|
|
esdsBox.setBufferSize(1250000);
|
|
esdsBox.setMaximumBitRate(10000000);
|
|
esdsBox.setAverageBitRate(it->second["bps"].asInt() * 8);
|
|
esdsBox.setConfigDescriptorTypeLength(5);
|
|
esdsBox.setESHeaderStartCodes(it->second["init"].asString());
|
|
esdsBox.setSLConfigDescriptorTypeTag(0x6);
|
|
esdsBox.setSLConfigExtendedDescriptorTypeTag(0x808080);
|
|
esdsBox.setSLDescriptorTypeLength(1);
|
|
esdsBox.setSLValue(2);
|
|
ase.setCodecBox(esdsBox);
|
|
stsdBox.setEntry(ase,0);
|
|
}
|
|
stblBox.setContent(stsdBox,0);
|
|
|
|
/// \todo update following stts lines
|
|
MP4::STTS sttsBox;//current version probably causes problems
|
|
sttsBox.setVersion(0);
|
|
MP4::STTSEntry newEntry;
|
|
newEntry.sampleCount = tmpParts;
|
|
//42, because of reasons.
|
|
newEntry.sampleDelta = 42;
|
|
sttsBox.setSTTSEntry(newEntry, 0);
|
|
stblBox.setContent(sttsBox,1);
|
|
|
|
if (it->second["type"] == "video"){
|
|
//STSS Box here
|
|
MP4::STSS stssBox;
|
|
stssBox.setVersion(0);
|
|
int tmpCount = 1;
|
|
for (int i = 0; i < it->second["keys"].size(); i++){
|
|
stssBox.setSampleNumber(tmpCount,i);
|
|
tmpCount += it->second["keys"][i]["partsize"].asInt();
|
|
}
|
|
stblBox.setContent(stssBox,2);
|
|
}
|
|
|
|
int offset = (it->second["type"] == "video");
|
|
|
|
|
|
MP4::STSC stscBox;
|
|
stscBox.setVersion(0);
|
|
uint32_t total = 0;
|
|
MP4::STSCEntry stscEntry;
|
|
stscEntry.firstChunk = 1;
|
|
stscEntry.samplesPerChunk = 1;
|
|
stscEntry.sampleDescriptionIndex = 1;
|
|
stscBox.setSTSCEntry(stscEntry, 0);
|
|
stblBox.setContent(stscBox,2 + offset);
|
|
|
|
MP4::STSZ stszBox;
|
|
stszBox.setVersion(0);
|
|
total = 0;
|
|
for (int i = 0; i < it->second["keys"].size(); i++){
|
|
std::deque<long long int> parsedParts;
|
|
JSON::decodeVector(it->second["keys"][i]["parts"].asString(), parsedParts);
|
|
for (unsigned int o = 0; o < parsedParts.size(); o++){
|
|
stszBox.setEntrySize(parsedParts[o], total);//in bytes in file
|
|
total++;
|
|
}
|
|
}
|
|
stblBox.setContent(stszBox,3 + offset);
|
|
|
|
MP4::STCO stcoBox;
|
|
stcoBox.setVersion(1);
|
|
total = 0;
|
|
uint64_t totalByteOffset = 0;
|
|
//Inserting wrong values on purpose here, will be fixed later.
|
|
//Current values are actual byte offset without header-sized offset
|
|
for (unsigned int i = 0; i < keyParts.size(); i++){//for all keypart size
|
|
if(keyParts[i].trackID == it->second["trackid"].asInt()){//if keypart is of current trackID
|
|
std::deque<long long int> parsedParts;
|
|
JSON::decodeVector(keyParts[i].parts, parsedParts);
|
|
for (unsigned int o = 0; o < parsedParts.size(); o++){//add all parts to STCO
|
|
stcoBox.setChunkOffset(totalByteOffset, total);
|
|
total++;
|
|
totalByteOffset += parsedParts[o];
|
|
}
|
|
}else{
|
|
totalByteOffset += keyParts[i].size;
|
|
}
|
|
}
|
|
//calculating the offset where the STCO box will be in the main MOOV box
|
|
//needed for probable optimise
|
|
/*stcoOffsets.push_back(
|
|
moovBox.payloadSize() +
|
|
trakBox.boxedSize() +
|
|
mdiaBox.boxedSize() +
|
|
minfBox.boxedSize() +
|
|
stblBox.boxedSize()
|
|
);*/
|
|
mdatSize = totalByteOffset;
|
|
stblBox.setContent(stcoBox,4 + offset);
|
|
minfBox.setContent(stblBox,2);
|
|
mdiaBox.setContent(minfBox, 2);
|
|
trakBox.setContent(mdiaBox, 1);
|
|
moovBox.setContent(trakBox, boxOffset);
|
|
boxOffset++;
|
|
}
|
|
//end arbitrary
|
|
//initial offset length ftyp, length moov + 8
|
|
unsigned long long int byteOffset = ftypBox.boxedSize() + moovBox.boxedSize() + 8;
|
|
//update all STCO
|
|
//std::map <int, MP4::STCO&> STCOFix;
|
|
//for tracks
|
|
for (unsigned int i = 1; i < moovBox.getContentCount(); i++){
|
|
//10 lines to get the STCO box.
|
|
MP4::TRAK checkTrakBox;
|
|
MP4::MDIA checkMdiaBox;
|
|
MP4::MINF checkMinfBox;
|
|
MP4::STBL checkStblBox;
|
|
MP4::STCO checkStcoBox;
|
|
checkTrakBox = ((MP4::TRAK&)moovBox.getContent(i));
|
|
for (int j = 0; j < checkTrakBox.getContentCount(); j++){
|
|
if (checkTrakBox.getContent(j).isType("mdia")){
|
|
checkMdiaBox = ((MP4::MDIA&)checkTrakBox.getContent(j));
|
|
break;
|
|
}
|
|
}
|
|
for (int j = 0; j < checkMdiaBox.getContentCount(); j++){
|
|
if (checkMdiaBox.getContent(j).isType("minf")){
|
|
checkMinfBox = ((MP4::MINF&)checkMdiaBox.getContent(j));
|
|
break;
|
|
}
|
|
}
|
|
for (int j = 0; j < checkMinfBox.getContentCount(); j++){
|
|
if (checkMinfBox.getContent(j).isType("stbl")){
|
|
checkStblBox = ((MP4::STBL&)checkMinfBox.getContent(j));
|
|
break;
|
|
}
|
|
}
|
|
for (int j = 0; j < checkStblBox.getContentCount(); j++){
|
|
if (checkStblBox.getContent(j).isType("stco")){
|
|
//STCOFix.insert( std::pair<int, MP4::STCO&>(((MP4::TKHD&)(checkTrakBox.getContent(0))).getTrackID(),(MP4::STCO&)(checkStblBox.getContent(j))));
|
|
checkStcoBox = ((MP4::STCO&)checkStblBox.getContent(j));
|
|
break;
|
|
}
|
|
}
|
|
/*MP4::Box temp = MP4::Box((moovBox.payload()+stcoOffsets[i]),false);
|
|
MP4::STCO & checkStcoBox = *((MP4::STCO*)(&temp));
|
|
std::cerr << checkStcoBox.toPrettyString() << std::endl;*/
|
|
//got the STCO box, fixing values with MP4 header offset
|
|
for (int j = 0; j < checkStcoBox.getEntryCount(); j++){
|
|
checkStcoBox.setChunkOffset(checkStcoBox.getChunkOffset(j) + byteOffset, j);
|
|
}
|
|
}
|
|
header << std::string(moovBox.asBox(),moovBox.boxedSize());
|
|
|
|
//printf("%c%c%c%cmdat", (mdatSize>>24) & 0x000000FF,(mdatSize>>16) & 0x000000FF,(mdatSize>>8) & 0x000000FF,mdatSize & 0x000000FF);
|
|
header << (char)((mdatSize>>24) & 0x000000FF) << (char)((mdatSize>>16) & 0x000000FF) << (char)((mdatSize>>8) & 0x000000FF) << (char)(mdatSize & 0x000000FF) << "mdat";
|
|
//std::cerr << "Header Written" << std::endl;
|
|
//end of header
|
|
|
|
return header.str();
|
|
}
|
|
|
|
void DTSC2MP4Converter::parseDTSC(JSON::Value mediaPart){
|
|
static long long unsigned int curKey = 0;//the key chunk we are currently searching for in keyParts
|
|
static long long unsigned int curPart = 0;//current part in current key
|
|
//mdat output here
|
|
//output cleanout buffer first
|
|
//while there are requested packets in the trackBuffer:...
|
|
//std::cerr << curPart << " " << curKey << " " << keyParts.size() << " " << keyParts[curKey].trackID << "|";
|
|
//std::cerr << trackBuffer[keyParts[curKey].trackID].empty() << std::endl;
|
|
std::cerr << "Curpart: " << curPart <<std::endl;
|
|
while (!trackBuffer[keyParts[curKey].trackID].empty()){
|
|
//output requested packages
|
|
std::deque<long long int> parsedParts;
|
|
JSON::decodeVector(keyParts[curKey].parts, parsedParts);
|
|
std::cerr << "Buffer packet size: " << mediaPart["data"].asString().size() << " Expected:" << parsedParts[curPart] << std::endl;
|
|
if(parsedParts[curPart] != trackBuffer[keyParts[curKey].trackID].front()["data"].asString().size()){
|
|
std::cerr << "Size discrepancy in buffer packet. Size: " << mediaPart["data"].asString().size() << " Expected:" << parsedParts[curPart] << std::endl;
|
|
}
|
|
stringBuffer += trackBuffer[keyParts[curKey].trackID].front()["data"].asString();
|
|
trackBuffer[keyParts[curKey].trackID].pop_front();
|
|
curPart++;
|
|
if(curPart >= parsedParts.size()){
|
|
curPart = 0;
|
|
curKey++;
|
|
}
|
|
}
|
|
//after that, try to put out the JSON data directly
|
|
if(keyParts[curKey].trackID == mediaPart["trackid"].asInt()){
|
|
//output JSON packet
|
|
std::deque<long long int> parsedParts;
|
|
JSON::decodeVector(keyParts[curKey].parts, parsedParts);
|
|
std::cerr << "JSON packet size: " << mediaPart["data"].asStringRef().size() << " Expected:" << parsedParts[curPart] << std::endl;
|
|
if(parsedParts[curPart] != mediaPart["data"].asStringRef().size()){
|
|
std::cerr << "Size discrepancy in JSON packet. Size: " << mediaPart["data"].asStringRef().size() << " Expected:" << parsedParts[curPart] << std::endl;
|
|
}
|
|
stringBuffer += mediaPart["data"].asStringRef();
|
|
curPart++;
|
|
if(curPart >= parsedParts.size()){
|
|
curPart = 0;
|
|
curKey++;
|
|
}
|
|
}else{
|
|
//buffer for later
|
|
trackBuffer[mediaPart["trackid"].asInt()].push_back(mediaPart);
|
|
}
|
|
}
|
|
|
|
bool DTSC2MP4Converter::sendReady(){
|
|
if (stringBuffer.length() > 0){
|
|
return true;
|
|
}else{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
std::string DTSC2MP4Converter::sendString(){
|
|
std::string temp = stringBuffer;
|
|
stringBuffer = "";
|
|
return temp;
|
|
}
|
|
}
|
|
|