From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTP id E8A0A471EB for ; Thu, 28 Sep 2023 22:58:57 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id ACFF268CBD8; Fri, 29 Sep 2023 01:58:53 +0300 (EEST) Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [217.70.183.199]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 5796C68CA42 for ; Fri, 29 Sep 2023 01:58:47 +0300 (EEST) Received: by mail.gandi.net (Postfix) with ESMTPSA id 2661AFF803 for ; Thu, 28 Sep 2023 22:58:45 +0000 (UTC) Date: Fri, 29 Sep 2023 00:58:44 +0200 From: Michael Niedermayer To: FFmpeg development discussions and patches Message-ID: <20230928225844.GB3543730@pb2> References: <20230923164344.GG3543730@pb2> <169589690228.6638.9407962520356451750@lain.khirnov.net> <20230928192835.GZ3543730@pb2> MIME-Version: 1.0 In-Reply-To: X-GND-Sasl: michael@niedermayer.cc Subject: Re: [FFmpeg-devel] SDR lib comments X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: multipart/mixed; boundary="===============0015791345075211708==" Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: --===============0015791345075211708== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="olLTNZSltDMg5Vbm" Content-Disposition: inline --olLTNZSltDMg5Vbm Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Sep 28, 2023 at 05:07:17PM -0400, Vittorio Giovara wrote: > On Thu, Sep 28, 2023 at 3:28=E2=80=AFPM Michael Niedermayer > wrote: >=20 > > On Thu, Sep 28, 2023 at 12:28:22PM +0200, Anton Khirnov wrote: > > > Quoting Michael Niedermayer (2023-09-23 18:43:44) > > > > Is a seperate library really the right choice for SDR in FFmpeg at > > this stage ? > > > > > > > > Also code can always be moved into an seperate library > > > > > > we've had postproc in the tree for ages, nobody maintains it or > > > cares about it, yet it seems impossible to get rid of it. > > > > what maintaince does it need ? > > >=20 > making sure that the library builds on all supported system, doesn't have > security holes, etc is it failing to build ? i would expect if it fails to build to be contacted about that. Or well if not that people would not expect it to be fixed by me. are there security holes ? If so i would expect them to be reported to ffmpeg-security or me or something like that. > or for packagers to bundle the library >=20 >=20 > > libpostproc implements part of ISO/IEC 14496-2 > > (that is the spec for an MPEG-4 ASP decoder) > > >=20 > We're going a bit off topic, but you're referring to something preceding > H264 which means is something older than 20 years -- while old formats > surely need to be supported against digital obsolescence, the > code:functionality ratio is certainly not worth it (who uses ASP > nowadays?), There is substantial amounts of existing material in ASP [...] >=20 >=20 > > I have too many other things to work on to do a big refactoring of it > > but if there are small bugs in it or questions about it i can look into > > them > > >=20 > I think the main reason libpostproc was mentioned is that we don't want a > repeat of the history for SDR - so far you're only developer expressing SDR currently is completely self contained in a input device/demuxer. Thats the very opposite of libpostproc which is a bit of video filtering a bit of mpeg4 ASP and neither in libavfilter (which did not exist when lib= postproc was created) nor libavcodec The main obstacle to cleanup libpostproc is probably the old style interlea= ved SIMD code. Again this has no parallel to SDR thx [...] --=20 Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Everything should be made as simple as possible, but not simpler. -- Albert Einstein --olLTNZSltDMg5Vbm Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iF0EABEIAB0WIQSf8hKLFH72cwut8TNhHseHBAsPqwUCZRYFIAAKCRBhHseHBAsP q+xXAJ9wjgsgdMfnBqe/JBorMLfSSKZYQQCdGjeaFiO1U2Gk8L5P868YIRA/UFo= =U7qk -----END PGP SIGNATURE----- --olLTNZSltDMg5Vbm-- --===============0015791345075211708== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". --===============0015791345075211708==--