From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.ffmpeg.org (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTPS id 8EDE14C76F for ; Tue, 5 Aug 2025 09:06:07 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTP id 299D368C1C1; Tue, 5 Aug 2025 12:06:03 +0300 (EEST) Received: from nef.ens.fr (nef2.ens.fr [129.199.96.40]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTPS id 9E0166803F3 for ; Tue, 5 Aug 2025 12:05:55 +0300 (EEST) X-ENS-nef-client: 129.199.129.80 ( name = phare.normalesup.org ) Received: from phare.normalesup.org (phare.normalesup.org [129.199.129.80]) by nef.ens.fr (8.14.4/1.01.28121999) with ESMTP id 57595sNM002460 for ; Tue, 5 Aug 2025 11:05:55 +0200 Received: by phare.normalesup.org (Postfix, from userid 1001) id D2C032EFE3; Tue, 5 Aug 2025 11:05:54 +0200 (CEST) Date: Tue, 5 Aug 2025 11:05:54 +0200 From: Nicolas George To: FFmpeg development discussions and patches Message-ID: References: <20250803125028.GD4581@haasn.xyz> <20250803124237.GB4581@haasn.xyz> <20250805105119.GD219179@haasn.xyz> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20250805105119.GD219179@haasn.xyz> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (nef.ens.fr [129.199.96.32]); Tue, 05 Aug 2025 11:05:55 +0200 (CEST) Subject: Re: [FFmpeg-devel] [PATCH] lavfi: protection against premultiplied alpha (was: The patch series about premultiplied alpha) 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: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: Niklas Haas (HE12025-08-05): > I will repeat myself briefly here that such a flag should be an opt-out, not > an opt-in. Supporting premultiplied alpha should be the default assumption > unless provable otherwise. Absolutely not. Do you dereference a pointer when you can prove it cannot be NULL or when you cannot prove it can be NULL? It is the same: if you cannot prove a filter produces a valid result, then we protect by default. It is already too much that it is not blocking when it is unspecified. On this I will stand firm. > On a side note, I don't think it's necessary to add a new "default" struct > just for one particular combination of flags; Of course it is not necessary, it just makes a dozen other patches much much shorter. > especially not if your intention > is (as you state) to have such flags for every other AVFrame property. It does not make it either harder nor easier. -- Nicolas George _______________________________________________ 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".