From patchwork Fri Oct 30 16:07:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Rheinhardt X-Patchwork-Id: 23291 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 CD91144A28C for ; Fri, 30 Oct 2020 18:07:18 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id A339B68A1B9; Fri, 30 Oct 2020 18:07:18 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-wr1-f68.google.com (mail-wr1-f68.google.com [209.85.221.68]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 002B3680122 for ; Fri, 30 Oct 2020 18:07:12 +0200 (EET) Received: by mail-wr1-f68.google.com with SMTP id i16so1640775wrv.1 for ; Fri, 30 Oct 2020 09:07:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=D3LrvfXjebzpPLt+ZWwlWvBJeoa+92AS5Ssjypos4x4=; b=gMIqlpDNG9wxx2oxxRXwca1OFDU1UOdLqsWOksLkifitBle4wzXjFVQ1Rjn6tCxNUI jKf3Pq2E7XV2bTfCjM9NZ7SjD4VUBLAQQKR/fpWdyu9FCZk7e/371W3iV8d7jZcn635I mH3ItswAnQACIg2UkQLqEn+zJ9sigcDn6yKOcZA/K45E+fFzP58HKGz6ia0aekdgBLph AmnquGsGWcr0nzObzNrrbCjnMrKFWgTYcWqqr1ZJTMG57rES8dVftYrCU1RRx9KBy50R 9UGr6TqKfYW9N0w7DbqsWwMtm1lVSwOf4PXkqiw6MdlukihiIe6tuPV1NNs4MGl3DU5o qhAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=D3LrvfXjebzpPLt+ZWwlWvBJeoa+92AS5Ssjypos4x4=; b=gKBivzE0HllUqulmE6MuiFek2xbWxX3mXY6cQwl1V91BmZt9+e2AIF9kpIft7iBWId SvTj0T56IYCEwyWwrrC/x0JuAmmeG6PvIHQLKCMDBT5rY3BDLJ+phRpcG0HCVmznQsjJ 6KnE94OWUAPZueTSig8n7KEIu4Pzm7MEXBZ3om0CedjuXvGtMJW4AaN9b87l17iETx7E WRTTR5SHG1f9F0QZB+cIjqN36PO60aYuR0V4GEkT2AabUhv2JMdNVi+bRU3gCS8tJgKv e/f9CNT2m18Hm92C42tWD1k4o51LNSds5xg9Lzc787WsjZ+7KTiZjKd99elFoZ3ViFVu 2dWg== X-Gm-Message-State: AOAM533SUmPbmd3umNU4NlTqGINOt/iFiB2R+DxtaRJU0BqZ+42uRyC+ aygt8A3shP+Mo9qatkqDqncXeVmOXz8= X-Google-Smtp-Source: ABdhPJyupDVD035hl5FN0rOyv/3KN0j8v/SGA9F9NDtUd1frC1EwTN0g5c1dA4zQ/YLTAhRnyR5lZg== X-Received: by 2002:a5d:4001:: with SMTP id n1mr4166268wrp.426.1604074032109; Fri, 30 Oct 2020 09:07:12 -0700 (PDT) Received: from sblaptop.fritz.box (ipbcc1aa4b.dynamic.kabel-deutschland.de. [188.193.170.75]) by smtp.gmail.com with ESMTPSA id l11sm10083199wro.89.2020.10.30.09.07.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Oct 2020 09:07:11 -0700 (PDT) From: Andreas Rheinhardt To: ffmpeg-devel@ffmpeg.org Date: Fri, 30 Oct 2020 17:07:04 +0100 Message-Id: <20201030160704.606904-1-andreas.rheinhardt@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH] avcodec/mpc8: Unobfuscate sign-extension 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 Cc: Andreas Rheinhardt Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Signed-off-by: Andreas Rheinhardt --- libavcodec/mpc8.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/mpc8.c b/libavcodec/mpc8.c index 03838a9351..631bac2753 100644 --- a/libavcodec/mpc8.c +++ b/libavcodec/mpc8.c @@ -384,7 +384,7 @@ static int mpc8_decode_frame(AVCodecContext * avctx, void *data, for(j = 0; j < SAMPLES_PER_BAND; j += 2){ t = get_vlc2(gb, q3_vlc[res - 3].table, MPC8_Q3_BITS, 2) + q3_offsets[res - 3]; c->Q[ch][off + j + 1] = t >> 4; - c->Q[ch][off + j + 0] = (t & 8) ? (t & 0xF) - 16 : (t & 0xF); + c->Q[ch][off + j + 0] = sign_extend(t, 4); } break; case 5: