From patchwork Wed Jan 29 21:55:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 17614 Return-Path: X-Original-To: patchwork@ffaux-bg.ffmpeg.org Delivered-To: patchwork@ffaux-bg.ffmpeg.org Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by ffaux.localdomain (Postfix) with ESMTP id 3E864448B9E for ; Wed, 29 Jan 2020 23:56:36 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 15E8B68B1DC; Wed, 29 Jan 2020 23:56:36 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe06-1.mx.upcmail.net (vie01a-dmta-pe06-1.mx.upcmail.net [84.116.36.14]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 5D8A9687F98 for ; Wed, 29 Jan 2020 23:56:30 +0200 (EET) Received: from [172.31.216.235] (helo=vie01a-pemc-psmtp-pe12.mail.upcmail.net) by vie01a-dmta-pe06.mx.upcmail.net with esmtp (Exim 4.92) (envelope-from ) id 1iwvK2-0002pQ-0N for ffmpeg-devel@ffmpeg.org; Wed, 29 Jan 2020 22:56:30 +0100 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id wvJ3iZwLUwlyswvJ3iWRuZ; Wed, 29 Jan 2020 22:55:30 +0100 X-Env-Mailfrom: michael@niedermayer.cc X-Env-Rcptto: ffmpeg-devel@ffmpeg.org X-SourceIP: 213.47.68.29 X-CNFS-Analysis: v=2.3 cv=E5OzWpVl c=1 sm=1 tr=0 a=2hcxjKEKjp0CzLx6oWAm4g==:117 a=2hcxjKEKjp0CzLx6oWAm4g==:17 a=MKtGQD3n3ToA:10 a=1oJP67jkp3AA:10 a=GEAsPZ9sns4A:10 a=ZZnuYtJkoWoA:10 a=6kukRsDQ0q1j-qhtjEEA:9 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Wed, 29 Jan 2020 22:55:27 +0100 Message-Id: <20200129215529.17410-1-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 X-CMAE-Envelope: MS4wfFoy48rzQAARWLpoSDz/J/BhhgrtWPCHgIfs7frvzDopZWkpSRgdgglrR7AP8TWLZSDyu9xVEXkBGbXFQQeLo6uHZs3TRXOuOI4qWDi9th0foz2OpZNt 3gQzgT+asXVh99ROKMR6ZyWQnoA9rpC4a1qcrFu0UvpuF3DSeL8P1MkQ Subject: [FFmpeg-devel] [PATCH 1/3] avcodec/screenpresso: Optimize sum_delta_flipped() X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 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 MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" 553 -> 332 sec Testcase: 20280/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SCREENPRESSO_fuzzer-6238663432470528 Signed-off-by: Michael Niedermayer --- libavcodec/screenpresso.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/screenpresso.c b/libavcodec/screenpresso.c index 5fac100897..d73c24df83 100644 --- a/libavcodec/screenpresso.c +++ b/libavcodec/screenpresso.c @@ -94,8 +94,9 @@ static void sum_delta_flipped(uint8_t *dst, int dst_linesize, { int i; for (; height > 0; height--) { + const uint8_t *src1 = &src[(height - 1) * src_linesize]; for (i = 0; i < bytewidth; i++) - dst[i] += src[(height - 1) * src_linesize + i]; + dst[i] += src1[i]; dst += dst_linesize; } }