file_status_e
avi_reader_c::read(generic_packetizer_c *ptzr,
bool) {
if ((-1 != m_vptzr) && (PTZR(m_vptzr) == ptzr))
return read_video();
for (auto &demuxer : m_audio_demuxers)
if ((-1 != demuxer.m_ptzr) && (PTZR(demuxer.m_ptzr) == ptzr))
return read_audio(demuxer);
for (auto &subs_demuxer : m_subtitle_demuxers)
if ((-1 != subs_demuxer.m_ptzr) && (PTZR(subs_demuxer.m_ptzr) == ptzr))
return read_subtitles(subs_demuxer);
return flush_packetizers();
}
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); });
}