From patchwork Fri Oct 11 19:45:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul B Mahol X-Patchwork-Id: 15704 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 20F8C4471CF for ; Fri, 11 Oct 2019 22:46:02 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id E889D689A52; Fri, 11 Oct 2019 22:46:01 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-wm1-f67.google.com (mail-wm1-f67.google.com [209.85.128.67]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id A8BB96881D7 for ; Fri, 11 Oct 2019 22:45:55 +0300 (EEST) Received: by mail-wm1-f67.google.com with SMTP id 7so11546474wme.1 for ; Fri, 11 Oct 2019 12:45:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id; bh=0Jq0+D9WUsvPPd50xd57Lqg5pniiGKt4gIh24sD5oYo=; b=tagPX41ax6sREnYvRdfkyEAcy3jnmdo/JDNMEQwQAC5dVLzOsHi4UNep6yd1nU0hQn ejEF4Qk8ZoPW2L6FDva1KdLWtVNtRLQDTepzeUd8HlYN684wJklDmZwmcJ4skrzsFEAP NjOWSrSvmlIXePRQbm34Zk+PYJ14gb4xxCOJj9fLhibBTozNgS0Fg/kB+qaxB41CBzOA yKIaT15e4Mk+7A2gHkhwIp7OE4qCeqgm1WsMCaJ6YtnzFhOON6QJnkeTBJFwMZcAw3CF SJL8NAyL85fStGA/vVh/mODbr4BA07HnxbF53Y6x9MXJvFNRbrqZP2rEwUHu5eIbJ8HF BAZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id; bh=0Jq0+D9WUsvPPd50xd57Lqg5pniiGKt4gIh24sD5oYo=; b=MwvtA6dJmf3pja92ympetg4qvBown4h7EV6AIR/c6Olam2BLzGKz9cEvHgKh8XzOQc Jo1cEKhx2nhlrNokJylYiDc1naI4BFEM7nD+lRdWO4RomLBm+ryFGd1XGsQn6TUyzOPS HL4ye29Uqzg6u2P5Mw2qee0A7HXJVkEAlqSYPaonw7BLCgElUPwPvp5tQqXqBuzqMZ3P vAOYWtZzkyC4m4cQAgunbG+AcB/8Exx5FW2eERCdYivPbL4TBN7f9viY9It+P1udr+ZZ UhgJQf+NC/qZeUdnMd5Tu8gs19jsV91UA3jFslMGih4PKWjlGI068CcjPT5lxzsW1WF0 BLNA== X-Gm-Message-State: APjAAAWfQFAl0g/eyJfv959PGSqyifh8NXqQH35PA6kTZjVcFakjcnKM /CYFkcCJ0c3uXY/SARttNL35QKXK X-Google-Smtp-Source: APXvYqxHsqKJruN+tA8gKN4QQHRD0UfEhCd0nHK2QR62tNwwmB3A8UrxCj4iUm7Lc6LA6Zfg5zwn4Q== X-Received: by 2002:a7b:cf28:: with SMTP id m8mr4815908wmg.161.1570823154907; Fri, 11 Oct 2019 12:45:54 -0700 (PDT) Received: from localhost.localdomain ([37.244.241.148]) by smtp.gmail.com with ESMTPSA id y186sm15322658wmd.26.2019.10.11.12.45.53 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Oct 2019 12:45:54 -0700 (PDT) From: Paul B Mahol To: ffmpeg-devel@ffmpeg.org Date: Fri, 11 Oct 2019 21:45:40 +0200 Message-Id: <20191011194540.13019-1-onemda@gmail.com> X-Mailer: git-send-email 2.17.1 Subject: [FFmpeg-devel] [PATCH] avutil/eval: add sgn() 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" Signed-off-by: Paul B Mahol --- doc/utils.texi | 3 +++ libavutil/eval.c | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/doc/utils.texi b/doc/utils.texi index d55dd315c3..4e2e713505 100644 --- a/doc/utils.texi +++ b/doc/utils.texi @@ -920,6 +920,9 @@ corresponding input value will be returned. @item round(expr) Round the value of expression @var{expr} to the nearest integer. For example, "round(1.5)" is "2.0". +@item sgn(x) +Compute sign of @var{x}. + @item sin(x) Compute sine of @var{x}. diff --git a/libavutil/eval.c b/libavutil/eval.c index 5da9a6d83b..48832979e2 100644 --- a/libavutil/eval.c +++ b/libavutil/eval.c @@ -163,6 +163,7 @@ struct AVExpr { e_last, e_st, e_while, e_taylor, e_root, e_floor, e_ceil, e_trunc, e_round, e_sqrt, e_not, e_random, e_hypot, e_gcd, e_if, e_ifnot, e_print, e_bitand, e_bitor, e_between, e_clip, e_atan2, e_lerp, + e_sgn, } type; double value; // is sign in other types union { @@ -197,6 +198,7 @@ static double eval_expr(Parser *p, AVExpr *e) case e_ceil : return e->value * ceil (eval_expr(p, e->param[0])); case e_trunc: return e->value * trunc(eval_expr(p, e->param[0])); case e_round: return e->value * round(eval_expr(p, e->param[0])); + case e_sgn: return e->value * FFDIFFSIGN(eval_expr(p, e->param[0]), 0); case e_sqrt: return e->value * sqrt (eval_expr(p, e->param[0])); case e_not: return e->value * (eval_expr(p, e->param[0]) == 0); case e_if: return e->value * (eval_expr(p, e->param[0]) ? eval_expr(p, e->param[1]) : @@ -470,6 +472,7 @@ static int parse_primary(AVExpr **e, Parser *p) else if (strmatch(next, "clip" )) d->type = e_clip; else if (strmatch(next, "atan2" )) d->type = e_atan2; else if (strmatch(next, "lerp" )) d->type = e_lerp; + else if (strmatch(next, "sgn" )) d->type = e_sgn; else { for (i=0; p->func1_names && p->func1_names[i]; i++) { if (strmatch(next, p->func1_names[i])) { @@ -657,6 +660,7 @@ static int verify_expr(AVExpr *e) case e_sqrt: case e_not: case e_random: + case e_sgn: return verify_expr(e->param[0]) && !e->param[1]; case e_print: return verify_expr(e->param[0])