[FFmpeg-devel] [PATCH] lavc/hevc_cabac: fix cbf_cb and cbf_cr for transform depth 4

[Fu, Linjie]

> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of
> Thilo Borgmann
> Sent: Thursday, December 12, 2019 22:15
> To: ffmpeg-devel at ffmpeg.org
> Subject: Re: [FFmpeg-devel] [PATCH] lavc/hevc_cabac: fix cbf_cb and cbf_cr
> for transform depth 4
> 
> Hi,
> 
> Am 12.12.19 um 08:27 schrieb Fu, Linjie:
> >> -----Original Message-----
> >> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of
> >> Carl Eugen Hoyos
> >> Sent: Wednesday, December 11, 2019 18:19
> >> To: FFmpeg development discussions and patches <ffmpeg-
> >> devel at ffmpeg.org>
> >> Subject: Re: [FFmpeg-devel] [PATCH] lavc/hevc_cabac: fix cbf_cb and
> cbf_cr
> >> for transform depth 4
> >>
> >> Am Mi., 11. Dez. 2019 um 09:57 Uhr schrieb Linjie Fu <linjie.fu at intel.com>:
> >>>
> >>> The max transform depth is 5(from 0 to 4), so we need 5 cabac states for
> >>> cbf_cb and cbf_cr.
> >>>
> >>> See Table 9-4 for details.
> >>
> >> Does this change the output of a file?
> >> If yes, please provide it / implement a fate test.
> >
> > Yes, this issue was found in some license-limited clips and does affect the
> decoding.
> > Hence it takes some efforts to generate an available file for verifying/test
> in the
> > community.
> >
> > I've created a ticket for this and attached the clips and the decode result
> with/without
> > this patch:
> > https://trac.ffmpeg.org/ticket/8425
> >
> > Please help to verify.
> 
> please add a fate test that uses your .h265 sample to verify decoding.
> 
Ping for this patch and the test in fate, thx.

- linjie