pub fn external(path: &str, to_format: &str) -> io::Result<(&'static str, Vec<u8>)> {
    // see if input and output formats are supported.
    let infmt = Format::from_str(path)?;
    let outfmt = Format::from_str(to_format)?;
    let (eol, mime) = match outfmt {
        Format::Srt => ("\r\n", "text/plain; charset=utf-8"),
        Format::Vtt => ("\n", "text/vtt; charset=utf-8"),
        other => return Err(ioerr!(InvalidData, "unsupported input format {:?}", other)),
    };

    // open subtitle file.
    let mut stf = SubtitleFile::open(path, infmt)?;

    // shortcut for vtt -> vtt.
    if infmt == Format::Vtt && outfmt == Format::Vtt {
        let mut buf = Vec::new();
        let mut rdr = stf.file.into_inner();
        rdr.read_to_end(&mut buf)?;
        return Ok((mime, buf));
    }

    let mut buf = String::new();
    if outfmt == Format::Vtt {
        buf.push_str("WEBVTT\n\n");
    }

    let mut seq = 1;
    while let Some(sample) = stf.next() {
        // sequence and timestamps.
        use std::fmt::Write;
        let _ = write!(buf, "{}{}", seq, eol);
        seq += 1;
        format_time(&mut buf, outfmt, sample.start);
        buf.push_str(" --> ");
        format_time(&mut buf, outfmt, sample.start + sample.duration);
        buf.push_str(eol);

        // text.
        if outfmt == Format::Srt {
            for c in sample.text.chars() {
                if c == '\n' {
                    buf.push_str("\r\n");
                } else {
                    buf.push(c);
                }
            }
        } else {
            buf.push_str(&sample.text);
        }
        if !buf.ends_with(eol) {
            buf.push_str(eol);
        }
        buf.push_str(eol);
    }

    Ok((mime, buf.into_bytes()))
}
/// Read an external subtitle file.
///
/// Input and output formats can be webvtt and srt, format will be
/// converted if needed. Output character set is always utf-8.
Read an external subtitle file.
Input and output formats can be webvtt and srt, format will be
converted if needed. Output character set is always utf-8.
Read an external subtitle file . Input and output formats can be webvtt and srt format will be converted if needed . Output character set is always utf - 8 .
pub fn external(path: &str, to_format: &str) -> io::Result<(&'static str, Vec<u8>)> {
    // see if input and output formats are supported.
    let infmt = Format::from_str(path)?;
    let outfmt = Format::from_str(to_format)?;
    let (eol, mime) = match outfmt {
        Format::Srt => ("\r\n", "text/plain; charset=utf-8"),
        Format::Vtt => ("\n", "text/vtt; charset=utf-8"),
        other => return Err(ioerr!(InvalidData, "unsupported input format {:?}", other)),
    };
    // open subtitle file.
    let mut stf = SubtitleFile::open(path, infmt)?;
    // shortcut for vtt -> vtt.
    if infmt == Format::Vtt && outfmt == Format::Vtt {
        let mut buf = Vec::new();
        let mut rdr = stf.file.into_inner();
        rdr.read_to_end(&mut buf)?;
        return Ok((mime, buf));
    }
    let mut buf = String::new();
    if outfmt == Format::Vtt {
        buf.push_str("WEBVTT\n\n");
    }
    let mut seq = 1;
    while let Some(sample) = stf.next() {
        // sequence and timestamps.
        use std::fmt::Write;
        let _ = write!(buf, "{}{}", seq, eol);
        seq += 1;
        format_time(&mut buf, outfmt, sample.start);
        buf.push_str(" --> ");
        format_time(&mut buf, outfmt, sample.start + sample.duration);
        buf.push_str(eol);
        // text.
        if outfmt == Format::Srt {
            for c in sample.text.chars() {
                if c == '\n' {
                    buf.push_str("\r\n");
                } else {
                    buf.push(c);
                }
            }
        } else {
            buf.push_str(&sample.text);
        }
        if !buf.ends_with(eol) {
            buf.push_str(eol);
        }
        buf.push_str(eol);
    }
    Ok((mime, buf.into_bytes()))
}
pub fn external ( path : & str , to_format : & str ) -> io :: Result < ( & ' static str , Vec < u8 > ) > { // see if input and output formats are supported. let infmt = Format :: from_str ( path ) ? ; let outfmt = Format :: from_str ( to_format ) ? ; let ( eol , mime ) = match outfmt { Format :: Srt => ( " \r \n " , " " ) , Format :: Vtt => ( " \n " , " " ) , other => return Err ( ioerr ! ( InvalidData " " other ) ) , } ; // open subtitle file. let mut stf = SubtitleFile :: open ( path , infmt ) ? ; // shortcut for vtt -> vtt. if infmt == Format :: Vtt && outfmt == Format :: Vtt { let mut buf = Vec :: new ( ) ; let mut rdr = stf . file . into_inner ( ) ; rdr . read_to_end ( & mut buf ) ? ; return Ok ( ( mime , buf ) ) ; } let mut buf = String :: new ( ) ; if outfmt == Format :: Vtt { buf . push_str ( " \n \n " ) ; } let mut seq = 1 ; while let Some ( sample ) = stf . next ( ) { // sequence and timestamps. use std :: fmt :: Write ; let _ = write ! ( buf " " seq eol ) ; seq += 1 ; format_time ( & mut buf , outfmt , sample . start ) ; buf . push_str ( " " ) ; format_time ( & mut buf , outfmt , sample . start + sample . duration ) ; buf . push_str ( eol ) ; // text. if outfmt == Format :: Srt { for c in sample . text . chars ( ) { if c == '\n' { buf . push_str ( " \r \n " ) ; } else { buf . push ( c ) ; } } } else { buf . push_str ( & sample . text ) ; } if ! buf . ends_with ( eol ) { buf . push_str ( eol ) ; } buf . push_str ( eol ) ; } Ok ( ( mime , buf . into_bytes ( ) ) ) }
Read an external subtitle file.
Read an external subtitle file .
path
&str
to_format
&str
path
&str
to_format
&str