C++ (Cpp) read_subtitles Examples

Example #1

File: r_avi.cpp Project: VRDate/mkvtoolnix

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();
}

Example #2

File: mkv_wrap.cpp Project: austin-dev/Aegisub

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); });
}