From patchwork Wed Jan 29 08:30:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul B Mahol X-Patchwork-Id: 17608 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 8919A4498CA for ; Wed, 29 Jan 2020 11:34:50 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 5ED7268A0B0; Wed, 29 Jan 2020 11:34:50 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-wr1-f67.google.com (mail-wr1-f67.google.com [209.85.221.67]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id C586468810E for ; Wed, 29 Jan 2020 11:34:43 +0200 (EET) Received: by mail-wr1-f67.google.com with SMTP id z3so19358762wru.3 for ; Wed, 29 Jan 2020 01:34:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id; bh=ljMf0idgfB921LGFhWFsDP+genakQQjcQ18s2D7G0PI=; b=KhH2T95zyRjvHV3mWADX//oQGa4mth/+d2Lspu0BtCIYsxIL4bNBZRo34nejMXpNJt uK3J7J1/ZO3tC9LK1Z5crGW+M6A740dQXKLmcxryzNWm5wJtDj//EFl1HLX2c4y9be+r iZ7D6FSN7F1z+mvO0TTl0or7CjftSSCDGXNc97qrHfMfC/ZQZhlefVSblL7fbJm3IKt4 2XaPPbNHgK6782OOlPzqmCTMItNnTVO/UbIdkIPbCIxvxV1QquunMV9PEbRMIOdNGRXc ZYbo0cWEhKuAmyL6cN7UCTqzeKAB6gp6gAqv5Mc92H93PdSWCz2MRXrZ1tD8apoOysdg Uhyw== 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=ljMf0idgfB921LGFhWFsDP+genakQQjcQ18s2D7G0PI=; b=ZtuImSNK5lqjgZR+NiP2amgVD4z5Vq3UxKeKUID+A2izNQjai06GEeAqFsEgwh1BHL zlABkIC05fV/T8ErdrGQLIEkWDVgOIMjjAC2BHJlYd0i8Pv+FY7oEComqw/VjRMbw6lN D1H0LdgmtzyENO5XE2jWHnUJOPxiEy4FgjufqpaCU0s3QtBdB9gUgi+SqXBIxK0E33w/ OcvlTcIMlmCPZd8StTj7ZnG6OnF7B6E9TV+vGUSms48EefilRn5RAfCmWhnrDGceyfwJ VkPdrQ/f/QkE8tKhV4IeQHEIS8KPBpGlVsO04HGgRPcSijJUdGvhgdToneBIErszVf4Q mCDg== X-Gm-Message-State: APjAAAXQg1w0Onu4gg1jHSND43PE/41oTk7bMC1fVK30Srgmt7EOAOU/ 0vTBt+bmOFgAAh4zBprFrc6iCjPExts= X-Google-Smtp-Source: APXvYqzVkV83Zpb+4Xlbkw3FLObaiFApv1c8PtkONXCNn+sPeHkhT9IHPRIGNyRXPbLtbnKbcGbXpA== X-Received: by 2002:adf:f803:: with SMTP id s3mr33657590wrp.7.1580286665605; Wed, 29 Jan 2020 00:31:05 -0800 (PST) Received: from localhost.localdomain ([109.227.58.1]) by smtp.gmail.com with ESMTPSA id m3sm1914996wrs.53.2020.01.29.00.31.04 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Jan 2020 00:31:05 -0800 (PST) From: Paul B Mahol To: ffmpeg-devel@ffmpeg.org Date: Wed, 29 Jan 2020 09:30:57 +0100 Message-Id: <20200129083057.12063-1-onemda@gmail.com> X-Mailer: git-send-email 2.17.1 Subject: [FFmpeg-devel] [PATCH] avformat/tty: add probe function 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 --- libavformat/tty.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/libavformat/tty.c b/libavformat/tty.c index 8d48f2c45c..60f7e9f87e 100644 --- a/libavformat/tty.c +++ b/libavformat/tty.c @@ -34,6 +34,13 @@ #include "internal.h" #include "sauce.h" +static int isansicode(int x) +{ + return x == 0x1B || x == 0x0A || x == 0x0D || (x >= 0x20 && x < 0x7f); +} + +static const char tty_extensions[31] = "ans,art,asc,diz,ice,nfo,txt,vt"; + typedef struct TtyDemuxContext { AVClass *class; int chars_per_frame; @@ -42,6 +49,17 @@ typedef struct TtyDemuxContext { AVRational framerate; /**< Set by a private option. */ } TtyDemuxContext; +static int read_probe(const AVProbeData *p) +{ + int cnt = 0; + + for (int i = 0; i < p->buf_size; i++) + cnt += !!isansicode(p->buf[i]); + + return (cnt * 100LL / p->buf_size) * (cnt > 400) * + !!av_match_ext(p->filename, tty_extensions); +} + /** * Parse EFI header */ @@ -153,8 +171,9 @@ AVInputFormat ff_tty_demuxer = { .name = "tty", .long_name = NULL_IF_CONFIG_SMALL("Tele-typewriter"), .priv_data_size = sizeof(TtyDemuxContext), + .read_probe = read_probe, .read_header = read_header, .read_packet = read_packet, - .extensions = "ans,art,asc,diz,ice,nfo,txt,vt", + .extensions = tty_extensions, .priv_class = &tty_demuxer_class, };