193 lines
7.4 KiB
C++
193 lines
7.4 KiB
C++
/// \file dtscfix.cpp
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/// Contains the code that will attempt to fix the metadata contained in an DTSC file.
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#include <string>
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#include <mist/dtsc.h>
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#include <mist/json.h>
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#include <mist/config.h>
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///\brief Holds everything unique to converters.
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namespace Converters {
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class HeaderEntryDTSC {
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public:
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HeaderEntryDTSC() : totalSize(0), keyNum(0), packetID(0), firstms(-1), lastms(0), keynum(0) {}
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long long unsigned int totalSize;
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long long int keyNum;
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long long int packetID;
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long long int firstms;
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long long int lastms;
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long long int keynum;
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std::string type;
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};
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///\brief Reads a DTSC file and attempts to fix the metadata in it.
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///\param conf The current configuration of the program.
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///\return The return code for the fixed program.
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int DTSCFix(Util::Config & conf){
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DTSC::File F(conf.getString("filename"));
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JSON::Value oriheader = F.getFirstMeta();
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JSON::Value meta = F.getMeta();
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JSON::Value pack;
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if ( !oriheader.isMember("moreheader")){
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std::cerr << "This file is too old to fix - please reconvert." << std::endl;
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return 1;
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}
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if (oriheader["moreheader"].asInt() > 0){
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if (meta.isMember("tracks") && meta.isMember("isFixed") && meta["isFixed"]){
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std::cerr << "This file was already fixed or doesn't need fixing - cancelling." << std::endl;
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return 0;
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}
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}
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meta.removeMember("isFixed");
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meta.removeMember("keytime");
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meta.removeMember("keybpos");
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meta.removeMember("moreheader");
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std::map<std::string,int> trackIDs;
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std::map<std::string,HeaderEntryDTSC> trackData;
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long long int nowpack = 0;
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// long long int lastaudio = 0;
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// long long int lastvideo = 0;
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// long long unsigned int totalvideo = 0;
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// long long unsigned int totalaudio = 0;
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// long long int keynum = 0;
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std::string currentID;
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int nextFreeID = 0;
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F.seekNext();
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while ( !F.getJSON().isNull()){
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if (F.getJSON()["packetid"].asInt() == 0){
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if (F.getJSON()["datatype"].asString() == "video"){
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currentID = "video0";
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trackData[currentID].packetID = 0;
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if (meta.isMember("video")){
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meta["tracks"][currentID] = meta["video"];
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meta.removeMember("video");
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}
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trackData[currentID].type = F.getJSON()["datatype"].asString();
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}else{
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if (F.getJSON()["datatype"].asString() == "audio"){
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currentID = "audio0";
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trackData[currentID].packetID = 0;
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if (meta.isMember("audio")){
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meta["tracks"][currentID] = meta["audio"];
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meta.removeMember("audio");
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}
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trackData[currentID].type = F.getJSON()["datatype"].asString();
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}else{
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F.seekNext();
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continue;
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}
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}
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}
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if (F.getJSON()["time"].asInt() >= nowpack){
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nowpack = F.getJSON()["time"].asInt();
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}
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if (trackData[currentID].firstms == -1){
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trackData[currentID].firstms = nowpack;
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}
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trackData[currentID].totalSize += F.getJSON()["data"].asString().size();
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trackData[currentID].lastms = nowpack;
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if (F.getJSON()["datatype"].asString() == "video"){
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if (F.getJSON()["keyframe"].asInt() != 0){
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meta["tracks"][currentID]["keytime"].append(F.getJSON()["time"]);
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meta["tracks"][currentID]["keybpos"].append(F.getLastReadPos());
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meta["tracks"][currentID]["keynum"].append( ++trackData[currentID].keynum);
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if (meta["tracks"][currentID]["keytime"].size() > 1){
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meta["tracks"][currentID]["keylen"].append(F.getJSON()["time"].asInt() - meta["tracks"][currentID]["keytime"][meta["tracks"][currentID]["keytime"].size() - 2].asInt());
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}
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}
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}
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F.seekNext();
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}
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long long int firstms = 9999999999;
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long long int lastms = -1;
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for (std::map<std::string,HeaderEntryDTSC>::iterator it = trackData.begin(); it != trackData.end(); it++){
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if (it->second.firstms < firstms){
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firstms = it->second.firstms;
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}
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if (it->second.lastms > lastms){
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lastms = it->second.lastms;
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}
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meta["tracks"][it->first]["firstms"] = it->second.firstms;
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meta["tracks"][it->first]["lastms"] = it->second.lastms;
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meta["tracks"][it->first]["length"] = (it->second.lastms - it->second.firstms) / 1000;
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if ( !meta["tracks"][it->first].isMember("bps")){
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meta["tracks"][it->first]["bps"] = (long long int)(it->second.lastms / ((it->second.lastms - it->second.firstms) / 1000));
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}
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meta["tracks"][it->first]["packetid"] = it->second.packetID;
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if (it->second.packetID != 0){
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meta["tracks"][it->first]["trackid"] = trackIDs[it->first];
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}else{
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meta["tracks"][it->first]["trackid"] = nextFreeID ++;
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}
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meta["tracks"][it->first]["type"] = it->second.type;
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if (it->second.type == "video"){
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int tmp = meta["tracks"][it->first]["keytime"].size();
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if (tmp > 0){
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meta["tracks"][it->first]["keylen"].append(it->second.lastms - meta["tracks"][it->first]["keytime"][tmp - 1].asInt());
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}else{
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meta["tracks"][it->first]["keylen"].append(it->second.lastms);
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}
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//calculate fragments
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meta["tracks"][it->first]["frags"].null();
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long long int currFrag = -1;
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for (unsigned int i = 0; i < meta["tracks"][it->first]["keytime"].size(); i++){
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if (meta["tracks"][it->first]["keytime"][i].asInt() / 10000 > currFrag){
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currFrag = meta["tracks"][it->first]["keytime"][i].asInt() / 10000;
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long long int fragLen = 1;
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long long int fragDur = meta["tracks"][it->first]["keylen"][i].asInt();
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for (unsigned int j = i; j < meta["tracks"][it->first]["keytime"].size(); j++){
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if (meta["tracks"][it->first]["keytime"][j].asInt() / 10000 > currFrag || j == meta["tracks"][it->first]["keytime"].size() - 1){
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JSON::Value thisFrag;
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thisFrag["num"] = meta["tracks"][it->first]["keynum"][i];
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thisFrag["len"] = fragLen;
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thisFrag["dur"] = fragDur;
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meta["tracks"][it->first]["frags"].append(thisFrag);
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break;
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}
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fragLen++;
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fragDur += meta["tracks"][it->first]["keylen"][j].asInt();
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}
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}
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}
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}
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}
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meta["firstms"] = firstms;
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meta["lastms"] = lastms;
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meta["length"] = (lastms - firstms) / 1000;
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//append the revised header
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std::string loader = meta.toPacked();
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long long int newHPos = F.addHeader(loader);
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if ( !newHPos){
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std::cerr << "Failure appending new header." << std::endl;
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return -1;
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}
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//re-write the original header with information about the location of the new one
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oriheader["moreheader"] = newHPos;
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loader = oriheader.toPacked();
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if (F.writeHeader(loader)){
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std::cerr << "Metadata is now: " << meta.toPrettyString(0) << std::endl;
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return 0;
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}else{
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std::cerr << "Failure rewriting header." << std::endl;
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return -1;
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}
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} //DTSCFix
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}
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/// Entry point for DTSCFix, simply calls Converters::DTSCFix().
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int main(int argc, char ** argv){
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Util::Config conf = Util::Config(argv[0], PACKAGE_VERSION);
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conf.addOption("filename", JSON::fromString("{\"arg_num\":1, \"arg\":\"string\", \"help\":\"Filename of the file to attempt to fix.\"}"));
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conf.parseArgs(argc, argv);
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return Converters::DTSCFix(conf);
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} //main
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