From patchwork Tue Jan 28 07:17:11 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: 17593 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 CE66A4468AF for ; Tue, 28 Jan 2020 09:17:28 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id A569668B27D; Tue, 28 Jan 2020 09:17:28 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-wm1-f66.google.com (mail-wm1-f66.google.com [209.85.128.66]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 0D1E368A9AA for ; Tue, 28 Jan 2020 09:17:22 +0200 (EET) Received: by mail-wm1-f66.google.com with SMTP id s144so1092963wme.1 for ; Mon, 27 Jan 2020 23:17:22 -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=HZqK1o72IQMaKy0rrzfo5Mv4v70C8FrNYJOgtGS7jGo=; b=CEe+GXD599SFeIF07tInAGIwUSHLkwaDkTmgHlvbJ3jYmmIkrmJV5+f04MuwjV9QxM NSF1iiPzB0DIpt8u7PhBa9a8Ddzx92ac9mQmQAS5hzP7cxkQgY6oc9kZ4h10nhsGpzzr RyAD66EeQfbva79Vqbc6jEXunAO8Dq0PvNj98Y8/Yha278FF8bhxhP77uvtg0A0VdmK6 BEdc3lnS5jWln6DIS2w/p5EaeeK14FtK4ZnXAjDVAjbhwDiw6dRlRmH0zWS9jD3JpBAJ mxb5LlKbEYRKARchMIIqIFF+JjXtC1ZSSaX9ozBMuJvzC+nZcE0RJBY7mJ0uEdNYr+jO hFiA== 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=HZqK1o72IQMaKy0rrzfo5Mv4v70C8FrNYJOgtGS7jGo=; b=b9Hp8h9G7zm8KSoonMTH1OTzO5Iq3Se0RpmzpQSoN5JhrHYhSKTtJ8uyQOzKDYJHSg 3szuNor3pnENq76Nhgass+VraNa3UpQNV694D2ytp4UN+8dUO4uGJgO54RvXhUXtmn8j 1a1C/Oa6o3pBh6hu4SjQCNE2NmpeiyQTZ4xDc8Q6lme5eE4CqIy7D0dMfnPzY5ut8v9L tC+PjAJEDeuWgVFbAh4NKcESDBh0aV6lcOC/yeOQ+/7n7OdgyVJ1PQsEsTUUAhUIP5kB YXgbhVcHEN4lpf5Q2RK+1xYhSVW5pCtrug48BI8ehNNxjyG8fAPqv/MLRXUuggBpmFGR iDvw== X-Gm-Message-State: APjAAAWnzPyKpDQX9RxAHvpKPdd1IiHSrN0UykCiCjcciWlsf/SyS3l5 L1ey4ANJIqyDTnNWVT5i9q8GZcOQ2H0= X-Google-Smtp-Source: APXvYqxUDA9v4fgQVvBlYfUevPiIdnXsrnj6XOAdgujXaz+rXbddyzIBukJeev3LPlDNuLVqmqOuqQ== X-Received: by 2002:a1c:1f51:: with SMTP id f78mr3124461wmf.60.1580195841143; Mon, 27 Jan 2020 23:17:21 -0800 (PST) Received: from localhost.localdomain ([77.237.98.59]) by smtp.gmail.com with ESMTPSA id q3sm1731505wmj.38.2020.01.27.23.17.20 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Jan 2020 23:17:20 -0800 (PST) From: Paul B Mahol To: ffmpeg-devel@ffmpeg.org Date: Tue, 28 Jan 2020 08:17:11 +0100 Message-Id: <20200128071711.23009-1-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 | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/libavformat/tty.c b/libavformat/tty.c index 8d48f2c45c..c127500fa1 100644 --- a/libavformat/tty.c +++ b/libavformat/tty.c @@ -24,6 +24,8 @@ * Tele-typewriter demuxer */ +#include + #include "libavutil/intreadwrite.h" #include "libavutil/avstring.h" #include "libavutil/log.h" @@ -34,6 +36,8 @@ #include "internal.h" #include "sauce.h" +static const char *const tty_extensions = "ans,art,asc,diz,ice,nfo,txt,vt"; + typedef struct TtyDemuxContext { AVClass *class; int chars_per_frame; @@ -42,6 +46,17 @@ 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 += !!isprint(p->buf[i]); + + return (cnt * 100LL / p->buf_size) * (cnt > 400) * + !!av_match_ext(p->filename, tty_extensions); +} + /** * Parse EFI header */ @@ -153,8 +168,9 @@ 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, };