//////////////////
// Actually parse
void MatroskaWrapper::Parse() {
// Clear keyframes and timecodes
keyFrames.Clear();
bytePos.Clear();
timecodes.clear();
// Get info
int tracks = mkv_GetNumTracks(file);
TrackInfo *trackInfo;
SegmentInfo *segInfo = mkv_GetFileInfo(file);
// Parse tracks
for (int track=0; track<tracks; track++) {
trackInfo = mkv_GetTrackInfo(file,track);
// Video track
if (trackInfo->Type == 1) {
// Variables
ulonglong startTime, endTime, filePos;
unsigned int rt, frameSize, frameFlags;
CompressedStream *cs = NULL;
// Timecode scale
__int64 timecodeScale = mkv_TruncFloat(trackInfo->TimecodeScale) * segInfo->TimecodeScale;
// Mask other tracks away
mkv_SetTrackMask(file, ~(1 << track));
// Progress bar
int totalTime = double(segInfo->Duration) / timecodeScale;
volatile bool canceled = false;
DialogProgress *progress = new DialogProgress(NULL,_("Parsing Matroska"),&canceled,_("Reading keyframe and timecode data from Matroska file."),0,totalTime);
progress->Show();
progress->SetProgress(0,1);
// Read frames
int frameN = 0;
while (mkv_ReadFrame(file,0,&rt,&startTime,&endTime,&filePos,&frameSize,&frameFlags) == 0) {
// Read value
double curTime = double(startTime) / 1000000.0;
frames.push_back(MkvFrame((frameFlags & FRAME_KF) != 0,curTime,filePos));
frameN++;
// Cancelled?
if (canceled) {
Close();
throw _T("Canceled");
}
// Update progress
progress->SetProgress(curTime,totalTime);
}
// Clean up progress
if (!canceled) progress->Destroy();
break;
}
}
// Copy raw
for (std::list<MkvFrame>::iterator cur=frames.begin(); cur!=frames.end(); cur++) {
rawFrames.push_back(*cur);
}
// Process timecodes and keyframes
frames.sort();
MkvFrame curFrame(false,0,0);
int i = 0;
for (std::list<MkvFrame>::iterator cur=frames.begin(); cur!=frames.end(); cur++) {
curFrame = *cur;
if (curFrame.isKey) keyFrames.Add(i);
bytePos.Add(curFrame.filePos);
timecodes.push_back(curFrame.time);
i++;
}
}
void MatroskaWrapper::GetSubtitles(agi::fs::path const& filename, AssFile *target) {
MkvStdIO input(filename);
char err[2048];
agi::scoped_holder<MatroskaFile*, decltype(&mkv_Close)> file(mkv_Open(&input, err, sizeof(err)), mkv_Close);
if (!file) throw MatroskaException(err);
// Get info
unsigned tracks = mkv_GetNumTracks(file);
std::vector<unsigned> tracksFound;
std::vector<std::string> tracksNames;
// Find tracks
for (auto track : boost::irange(0u, tracks)) {
auto trackInfo = mkv_GetTrackInfo(file, track);
if (trackInfo->Type != 0x11 || trackInfo->CompEnabled) continue;
// Known subtitle format
std::string CodecID(trackInfo->CodecID);
if (CodecID == "S_TEXT/SSA" || CodecID == "S_TEXT/ASS" || CodecID == "S_TEXT/UTF8") {
tracksFound.push_back(track);
tracksNames.emplace_back(agi::format("%d (%s %s)", track, CodecID, trackInfo->Language));
if (trackInfo->Name) {
tracksNames.back() += ": ";
tracksNames.back() += trackInfo->Name;
}
}
}
// No tracks found
if (tracksFound.empty())
throw MatroskaException("File has no recognised subtitle tracks.");
unsigned trackToRead;
// Only one track found
if (tracksFound.size() == 1)
trackToRead = tracksFound[0];
// Pick a track
else {
int choice = wxGetSingleChoiceIndex(_("Choose which track to read:"), _("Multiple subtitle tracks found"), to_wx(tracksNames));
if (choice == -1)
throw agi::UserCancelException("canceled");
trackToRead = tracksFound[choice];
}
// Picked track
mkv_SetTrackMask(file, ~(1 << trackToRead));
auto trackInfo = mkv_GetTrackInfo(file, trackToRead);
std::string CodecID(trackInfo->CodecID);
bool srt = CodecID == "S_TEXT/UTF8";
bool ssa = CodecID == "S_TEXT/SSA";
AssParser parser(target, !ssa);
// Read private data if it's ASS/SSA
if (!srt) {
// Read raw data
std::string priv((const char *)trackInfo->CodecPrivate, trackInfo->CodecPrivateSize);
// Load into file
boost::char_separator<char> sep("\r\n");
for (auto const& cur : boost::tokenizer<boost::char_separator<char>>(priv, sep))
parser.AddLine(cur);
}
// Load default if it's SRT
else {
target->LoadDefault(false, OPT_GET("Subtitle Format/SRT/Default Style Catalog")->GetString());
parser.AddLine("[Events]");
}
// Read timecode scale
auto segInfo = mkv_GetFileInfo(file);
int64_t timecodeScale = mkv_TruncFloat(trackInfo->TimecodeScale) * segInfo->TimecodeScale;
// Progress bar
auto totalTime = double(segInfo->Duration) / timecodeScale;
DialogProgress progress(nullptr, _("Parsing Matroska"), _("Reading subtitles from Matroska file."));
progress.Run([&](agi::ProgressSink *ps) { read_subtitles(ps, file, &input, srt, totalTime, &parser); });
}
