[FFmpeg-devel] [RFC PATCH v2] libavcodec/jpeg2000_parser: Add jpeg2000 parser

[Michael Niedermayer]

On Mon, Apr 20, 2020 at 04:13:44PM +0530, Gautam Ramakrishnan wrote:
> On Mon, Apr 20, 2020 at 3:38 PM Michael Niedermayer
> <michael at niedermayer.cc> wrote:
> >
> > On Mon, Apr 20, 2020 at 01:36:47AM +0530, gautamramk at gmail.com wrote:
> > > From: Gautam Ramakrishnan <gautamramk at gmail.com>
> > >
> > > I have attempted to write a JPEG2000 Parser. Need
> > > help on testing the code and some tips on how to
> >
> > to test the code i would sugest to generate a file
> > or files with many jpeg2000 images and then try to
> > decode it to -f framecrc
> This helps me check whether the image is correct by comparing the CRC value?
> > if that work repeat while varying the packet size
> > input to the parser, a parser must work with anything
> > from 1 byte per input to sizes being larger than a
> > single frame.
> >
> So a packet to a parser is basically a smaller unit to which the parser is fed
> data to? When I tried printing buffer size during parse, it shows 4096.

> Does that mean the packet size was 4096?

yes, that likely comes from 
libavformat/img2dec.c:            size[0] = 4096;

random pieces of bytes -> parser -> sequence of packets representing frames

thanks

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

If you drop bombs on a foreign country and kill a hundred thousand
innocent people, expect your government to call the consequence
"unprovoked inhuman terrorist attacks" and use it to justify dropping
more bombs and killing more people. The technology changed, the idea is old.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 181 bytes
Desc: not available
URL: <https://ffmpeg.org/pipermail/ffmpeg-devel/attachments/20200421/5cb8441e/attachment.sig>