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 210DE43732 for ; Wed, 26 Oct 2022 07:58:28 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 8869B68BB90; Wed, 26 Oct 2022 10:58:26 +0300 (EEST) Received: from mail-vs1-f50.google.com (mail-vs1-f50.google.com [209.85.217.50]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 23BFE68B9FA for ; Wed, 26 Oct 2022 10:58:20 +0300 (EEST) Received: by mail-vs1-f50.google.com with SMTP id 1so13692766vsx.1 for ; Wed, 26 Oct 2022 00:58:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=to:subject:message-id:date:from:references:in-reply-to:mime-version :from:to:cc:subject:date:message-id:reply-to; bh=XuHUxuX4Tm9v8K/pzCVPLn68agWxHmsIE7X5Xybe0Rc=; b=RhDgkbl8JCxCvFHhpdIoECZzuX+5vg21pADnvbdjGI1WgasQHSq7N6Sxn+vnRbU757 4HexPl57S3l8HCDhuWwCrjBWGuqUNlV9XXagJazedTV00CJsQ6agAuM7OrJTdN4n3WUH 92cgLA4VMTbJVYr1IyBrp6LuIoZspLo7HDjIhTWPNBCLRoEP5nRweiyKffUB48PgU+7j IXE6Is90FaYnuWOK2O2d31OLaiT/JDGpsasOLzBzK2pmL3W6A8gMJjxhODLVNB2igfJ3 CZ5LTqhz9C2cy9k5bSSUoUJ2QHXJTIH2XhFqDH5dlROqSzVboXxDYp/wz0EjyUv76PBb m4HQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:subject:message-id:date:from:references:in-reply-to:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=XuHUxuX4Tm9v8K/pzCVPLn68agWxHmsIE7X5Xybe0Rc=; b=Kf2K04goFEpPjq3WJMKspTDcw1ByytVX9E1yzoppS1gUI/KJ6U9u/KSuG5iQRPGeVB A6YWYjpNNxjJ2hCeMGHuY+Q9c0nfjA30+F/RQNwLZWaMtGAQ1tzS11wKl6WB8ASRL6Rr zxTLwnFIn9mX/XF9KhOp7Gle+CvnvIbpxmcfya8TNqhTSlWuuh4qGHOFUjnsQVBXAgGt ym2ZBy8eTHwfQ9SbQMXbZv2d4Ybgs6buyCVcl6afUuygPLEzdwlI968+T8U557Nn1ECr APzLxbPWwmIAR2Aw+S3iXIkeQOaw0Xx/6BfjU3dDqnJIU/vMBwTpKY2XHa5pJnCuI+cB uCag== X-Gm-Message-State: ACrzQf2Ron5ephrPbpb9VQ1X8/R5twkGgckkPrtPZVsktUT3NF5aYutY Q3dnKJePKjFBDOIulIRhVAicBKVdK0U5oTqu2agCI5CM X-Google-Smtp-Source: AMsMyM7FD7mHtBv9AXQZqmOoARqVpE3zSK+o57r8YTwllZZhVpEjW85oSHOYgqKRBnuT3MBhqfWgizPRPSm+y5GcTqw= X-Received: by 2002:a67:8c43:0:b0:3aa:2da2:60c5 with SMTP id o64-20020a678c43000000b003aa2da260c5mr5237174vsd.57.1666771098535; Wed, 26 Oct 2022 00:58:18 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a05:612c:612:b0:314:ac6a:1eb7 with HTTP; Wed, 26 Oct 2022 00:58:17 -0700 (PDT) In-Reply-To: References: <2b7f9605-518a-4cda-6503-7842f22fa620@das-werkstatt.com> From: Paul B Mahol Date: Wed, 26 Oct 2022 09:58:17 +0200 Message-ID: To: FFmpeg development discussions and patches Subject: Re: [FFmpeg-devel] FFV1 slicecrc: "hashxx" instead of "CRC" for speed? 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: On 10/26/22, Kieran Kunhya wrote: > On Tue, 25 Oct 2022, 21:32 Peter B., wrote: > >> Hi everyone :) >> >> Would it possibly have a significant impact on coding speed of FFV1's >> slicecrc option (Where a CRC is calculated for each frame slice), to use >> a faster algorithm instead (if one exists)? >> I'm wondering if, for example something like "xxHash" may warrant a try? >> (Haven't found CRC vs xxHash benchmarks yet, but I'm still looking) >> >> Anyhow, >> Thanks for any of your time :D > > > I haven't benchmarked the overhead of the CRC in FFv1 vs the encode or > decode process. > But FFmpeg's CRC could be optimised using multiple unrolled tables or SIMD > or other approaches. It is already using multiple tables. > > Regards, > Kieran Kunhya > _______________________________________________ > 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". > _______________________________________________ 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".