SubtitleFile.h

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#pragma once
#include "DLLInfo.h"
#include <NDEVR/TimeSpan.h>
#include <NDEVR/BufferedScanner.h>
namespace NDEVR
{
    /**--------------------------------------------------------------------------------------------------
    \brief Class which can be used to write a subtitle in real time to a file, which can be played
        back alongside a video being recorded concurrently.
    **/
    class NDEVR_WIDGETS_API SubtitleFileWriter
    {
    public:
        SubtitleFileWriter(const File& file);
        void setCurrentTime(TimeSpan span);
        void addSubtitle(const String& text);
        void writeText();
        void finish(File file);
    protected:
        File m_file;
        String m_last_text;
        TimeSpan m_last_subtitle_start;
        TimeSpan m_current_time;
        uint04 m_text_index = 0;
    };
    /**--------------------------------------------------------------------------------------------------
    \brief Class which can be used to read a subtitle file and return the subtitle that should be
        played at a specific time.
    **/
    class NDEVR_WIDGETS_API SubtitleFileReader
    {
    public:
        SubtitleFileReader(const File& file);
        void readText();
        String currentText(const TimeSpan& current) const;
    protected:
        TimeSpan convertFromString(const String& string);
    protected:
        Buffer<std::pair<Vector<2, TimeSpan>, String>> m_subtitles;
        BufferedScanner m_scanner;
    };
    
}