On Sat, 3 Jun 2017 14:07:30 +0200 (CEST) Jan Engelhardt <jeng...@inai.de> wrote:
> On Saturday 2017-06-03 13:34, Hendrik Leppkes wrote: > >On Sat, Jun 3, 2017 at 1:18 PM, Jan Engelhardt <jeng...@inai.de> wrote: > >> > >>The layout of struct AVCodec changed. Four function pointers were > >>inserted in the middle, shifting void (*flush) to a new address. > >>The size of AVCodec also changed, which would have required a full > >>MAJOR bump. > > > >Our ABI is stable in one direction, not in both. [...] > >The same applies to structs. The size of structs is not part of the > >ABI, and as such we are free to grow it to accomodate new fields > >without breaking the ABI. > > Size changes are breakers in both directions. > > You claim your ABI is stable in one direction, which means that a > program built with 3.0 headers should work with a 3.3 library on a > separate system. However, a 3.0 program which invokes > someAVcontext->flush(...) would, under 3.3, invoke someAVc->send_frame > because of the changed layout. So it's not ABI compatible in that one > direction that ffmpeg is supposed to be compile, either. These callbacks are not public. A program using them is broken. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
