[FFmpeg-devel] [PATCH] SubRip decoder

[Aurelien Jacobs]

On Sat, Dec 04, 2010 at 03:58:58PM +0100, Aurelien Jacobs wrote:
> On Sun, Nov 28, 2010 at 05:53:04PM -0500, Alexander Strange wrote:
> > 
> > On Nov 28, 2010, at 5:31 PM, Aurelien Jacobs wrote:
> > 
> > > Hi,
> > > 
> > > $subject
> > > 
> > > This SubRip decoder supports all the SubRip features that I know about.
> > > It especially support everything tested by the sample files from
> > > http://ale5000.altervista.org/subtitles.htm
> > 
> > What generates files with moving display coordinates?
> 
> Emacs/vim/... ?
> 
> > None of those players support them, and neither does vsfilter:
> > 
> > http://google.com/codesearch/p?hl=en#_g4u1OIsR_M/trunk/src/subtitles/STS.cpp&q=package:vsfilter%20subrip&l=476
> > 
> > Until the day comes when WebSRT is relevant, we might as well be parser compatible with vsfilter and ignore them.
> 
> Well, if someone happens to write them in a file, I guess it's not just
> for fun. So why should we ignore them instead of trying to render them ?
> Anyway, if you insist, I can comment this part.
> 
> > > +    snprintf(header, sizeof(header),
> > > +             "[Script Info]\r\n"
> > > +             "ScriptType: v4.00+\r\n"
> > > +             "\r\n"
> > > +             "[V4+ Styles]\r\n"
> > 
> > Watch out for the weird default PlayRes* values.
> 
> The default is 384x288.
> Do you think I should choose another default value ?
> 
> > > + * Copyright (c) 2010  Aurelien Jacobs <aurel at gnuage.org>
> > 
> > Double space.
> 
> Yes. So what ?
> 
> $ git grep "Copyright.*  "|wc -l
> 85
> 
> It seems it is just a copy/paste from the template in COPYING.LGPLv2.1.
> 
> > > +        case '{':
> > > +            an += sscanf(in, "{\\an%*1u}%c", &c) == 1;
> > > +            if ((an != 1 && sscanf(in, "{\\%*[^}]}%n%c", &len, &c) > 0) ||
> > > +                sscanf(in, "{%*1[CcFfoPSsYy]:%*[^}]}%n%c", &len, &c) > 0) {
> > > +                in += len - 1;
> > > +            } else
> > > +                *out++ = *in;
> > > +            break;
> > 
> > 
> > What does this do? I hate reading handwritten parsers...
> 
> Comment added.
> 
> > > +                    int i, j, unkown = 0;
> > 
> > 
> > 'unknown'
> 
> Thanks, fixed.
> 
> > > +static const char *read_ts(const char *buf, int *ts_start, int *ts_end,
> > > +                           int *x1, int *y1, int *x2, int *y2)
> > > +{
> > > +    int i, hs, ms, ss, he, me, se;
> > > +
> > > +    for (i=0; i<2; i++) {
> > 
> > 
> > What is the loop for?
> 
> It allows supporting standard srt as well as the variant which don't
> have a line containing event number just before the timestamp line.
> 
> > Please add some testcases.
> 
> Added a fate test.

Ping ?
Very slightly updated version attached.

Aurel
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