[FFmpeg-devel] [PATCH] hevc_ps: verify P/T/L information

Mickaël Raulet mraulet at gmail.com
Sun Aug 10 17:57:48 CEST 2014


Le 10 août 2014 à 15:16, Christophe Gisquet <christophe.gisquet at gmail.com> a écrit :

> Hi,
> 2014-08-10 14:42 GMT+02:00 Ronald S. Bultje <rsbultje at gmail.com>:
>> Are we using the checked bitstream reader? If we are, we're fine already...
> I think we are. On the other hand, it seems the top caller,
> ff_hevc_decode_nal_vps, is never checking if we have read past the
> bitstream end. Shouldn't this be checked at the very end? Hitting the
> bitstream end yet not reporting invalid data at some point looks weird
> to me.

information from the vps is not used for the time being.
and yes we are using the checked bitstream reader. we rely on the AVC cabac engine.

> So, I'm just not sure this always yields vps/sps/... info, so catching
> it might be good. On the other hand, this doesn't help catching bugs
> in the code elsewhere.
>> If not, maybe we should, because let's be honest, getbits is only in
>> headers, so it's not particularly performance-sensitive.
> And this is high-level syntax (think sps), so indeed.

They are some missing checks in the PSes but I think most of them are there.


More information about the ffmpeg-devel mailing list