From patchwork Sun Sep 12 03:22:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Soft Works X-Patchwork-Id: 30171 Delivered-To: ffmpegpatchwork2@gmail.com Received: by 2002:a05:6602:2a4a:0:0:0:0 with SMTP id k10csp2863707iov; Sat, 11 Sep 2021 20:23:57 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzrbf/Tq+30WQfZKn/ONLCL57cIC9XZTuwFLG/h9O4ccV7d/tP1nbFTzrfK25b/m65wT+Wj X-Received: by 2002:a50:ab42:: with SMTP id t2mr6171324edc.113.1631417037479; Sat, 11 Sep 2021 20:23:57 -0700 (PDT) Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org. [79.124.17.100]) by mx.google.com with ESMTP id v18si3184150edx.605.2021.09.11.20.23.57; Sat, 11 Sep 2021 20:23:57 -0700 (PDT) Received-SPF: pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) client-ip=79.124.17.100; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@hotmail.com header.s=selector1 header.b=Fizvi4rR; arc=fail (body hash mismatch); spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=hotmail.com Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id AB4EC68AA7F; Sun, 12 Sep 2021 06:22:12 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10olkn2086.outbound.protection.outlook.com [40.92.41.86]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 1F68F68AA6A for ; Sun, 12 Sep 2021 06:22:10 +0300 (EEST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=eBVGOeQ5WTbHGHuOTSDAfp3LhkmIIX72uSLSv1iNa3WEhQE4XIlWwJQwx2AcvfRmydR5J0GzMo6bZ4q5JXXHoocrweMu7dZpzr8NPoDk1Tr69yCKJFmKwlD/PNA6D8vbeHH22gKofXYy/q3JRQ34gL/FlFNf+qyl7Wdi/g+GVPzC4jAf3DfoPR1co7q2IP8LZYjPw7hOrmqEkoX8g3ak4Xp83AcxJ9C2mwKDr4M5bz0977r2jwiPqFddOq2n4b6pEayR+A8Lutg7I9//yHFdKWbjN5qZeNfTODL5Ur6NYCSSlNM+8sndJ5PQnS/twdGqodiip21RQLamgQLpCaJ3xA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=Gv3UCl0YQw1n3DMu4JWPrxqWc/RDXW7ZAxtW2ve7iyg=; b=lhe3M3gkffHpCgrCnfW1mw612gdvz7xtre4jjVjRymi6SvaM3d9PjEG42/xY4eieVMxOsFY52KTQhgj7EVUFxMvD3mCgoVU5Z/Oms85od0Si+eSKgbwmup1lNbsziFQYJh1EGaMdLhQZiN3f1PsUXAdWK7QgeQVnWigXf4c/2gI3WhfeAOBIxECE+MFjWY0rEKaODQf86TSvOEKTe/Z61MNE6oY0AsAsG60TanQIjld8FWJ67fCzUoH6VQ5TxhorJWJjIvRZeRTJT+my1PnErMdttrlbe2kFRxd96JgqyI/fUvh77dmMGthyfDo5rPkRI/D5vTqySuEk5RvweZutsg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none; dkim=none; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hotmail.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Gv3UCl0YQw1n3DMu4JWPrxqWc/RDXW7ZAxtW2ve7iyg=; b=Fizvi4rRnCQr1cTQ0+zbzYC6EdiafKIIiz16CUNi+SmJIGXGiQUrQtjV+dFILFh5sZkexZZWkg/v/9GKgoOpCIol+pKB2cuc1TQtIIHljW49A3pz8MZkKnQ42zvlvSyVx2wn/ddRUBpLbG/BSy2e9L3mPSlhdV6OF4kliZHwPTS9v7coawRewqboK5WU77FbasOXvIafMxTCpiYY+angKvXqWhf0QJqR6O9tCRTlN/AT9oybXODNE5AFcq3wPja3WxNcEz7y76fED4zeGJ7O9nJ7TIklzqSJtAN10krGujlrjxDvIup8ol0Jz8wz5mxjBSwd5m2Hso11gh21amz6xg== Received: from MN2PR04MB5981.namprd04.prod.outlook.com (2603:10b6:208:da::10) by MN2PR04MB5728.namprd04.prod.outlook.com (2603:10b6:208:3d::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4500.14; Sun, 12 Sep 2021 03:22:08 +0000 Received: from MN2PR04MB5981.namprd04.prod.outlook.com ([fe80::ecfe:2528:2012:22cb]) by MN2PR04MB5981.namprd04.prod.outlook.com ([fe80::ecfe:2528:2012:22cb%5]) with mapi id 15.20.4500.018; Sun, 12 Sep 2021 03:22:08 +0000 From: Soft Works To: "ffmpeg-devel@ffmpeg.org" Thread-Topic: [PATCH v5 12/12] avfilter/stripstyles: Add stripstyles filter Thread-Index: AQHXp4VeYrniaPUvMEurCkDYPEmD9Q== Date: Sun, 12 Sep 2021 03:22:08 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-tmn: [MF1C250X5nRmcDN5XJqpb9DMxgIetK8OcNLHrpiAlTk=] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 68299079-0ccb-43d3-8f62-08d9759c80ed x-ms-traffictypediagnostic: MN2PR04MB5728: x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: /ts4ruDvmOuNBLvVXAIDQrIpanma6veGJQM1YzXRWpVR4qSFS8e4IxrJ2XFI+mPaCkzsl+RRybrR/rMKVsl6VKUmMAOR/dJYFnp7VuX+/ZiNanElVIku2IZ9E/np2okleCs+Ul6ovirUXUt6ZbfbUSb8CNTJbImC0p4CU8ZIIT8qpo88OXHcKhs5f6vPd+Z3JWPrmiD/nMP6zUSsA6zAMNz2lTrcNDtNftr40CkLfc3VWUkk3hKHL9toTgBvdZQazlL8A1z/hvyU59iTl6nknXTEaraqc7ZpMs/p7aF6lDiBs1Wlbh9SLcdONsI+g0RnmO1WCUI05nPeHi/NXtQe3a2owqQeW01QUg/QozsMx4S9Rqhi4K5qf2VbljrJMTl2XbZY7QtIcUthcHacuXkRV2tYtk+5xYHdfAZtL1B1J3OVakMCCdHhwtsIr4XLH8JFxj/8U1vuxD4kNAH3WJVeB1RaDWU3oASNPYW/vo6tpxw= x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: nw4rJecd/tPCEJA0QYyOd3KyiTuOS+pt5jj/kyP4fmT2v2uivDGC3TMNHjTCbwze4te8xSrAuZW4DjU6QuZ9p778/2Iuy0CTOC5kS4cqiuAiFnmnCwGWDYaKwjVSW7ynVdWSmdsx4GZ2T7UJe83dcw== x-ms-exchange-transport-forked: True MIME-Version: 1.0 X-OriginatorOrg: sct-15-20-3174-20-msonline-outlook-529c7.templateTenant X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: MN2PR04MB5981.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-CrossTenant-Network-Message-Id: 68299079-0ccb-43d3-8f62-08d9759c80ed X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Sep 2021 03:22:08.7246 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-rms-persistedconsumerorg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR04MB5728 Subject: [FFmpeg-devel] [PATCH v5 12/12] avfilter/stripstyles: Add stripstyles filter X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 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 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: 7/zL/HjWSJj4 Signed-off-by: softworkz --- doc/filters.texi | 24 ++++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/sf_stripstyles.c | 215 +++++++++++++++++++++++++++++++++++ 4 files changed, 241 insertions(+) create mode 100644 libavfilter/sf_stripstyles.c diff --git a/doc/filters.texi b/doc/filters.texi index 9fd2876d63..6c74dacee3 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -25024,6 +25024,30 @@ existing filters using @code{--disable-filters}. Below is a description of the currently available subtitle filters. +@section stripstyles + +Remove all inline styles from subtitle events. + +It accepts the following parameters: + +@table @option +@item remove_animated +Also remove text which is subject to animation (default: true) +Usually, animated text elements are used used in addition to static subtitle lines for creating effects, so in most cases it is safe to remove the animation content. +If subtitle text is missing, try setting this to false. + +@end table + +@subsection Examples + +@itemize +@item +Change all characters to upper case while keeping all styles and animations: +@example +ffmpeg -i "https://streams.videolan.org/samples/sub/SSA/subtitle_testing_complex.mkv" -filter_complex "[0:1]stripstyles" -map 0 output.mkv +@end example +@end itemize + @section textmod Modify subtitle text in a number of ways. diff --git a/libavfilter/Makefile b/libavfilter/Makefile index 5a5a4be47e..626e1bed74 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -536,6 +536,7 @@ OBJS-$(CONFIG_NULLSINK_FILTER) += vsink_nullsink.o # subtitle filters OBJS-$(CONFIG_TEXTMOD_FILTER) += sf_textmod.o +OBJS-$(CONFIG_STRIPSTYLES_FILTER) += sf_stripstyles.o # multimedia filters OBJS-$(CONFIG_ABITSCOPE_FILTER) += avf_abitscope.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index 6d7a535ee8..8f7d697408 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -524,6 +524,7 @@ extern const AVFilter ff_avf_showvolume; extern const AVFilter ff_avf_showwaves; extern const AVFilter ff_avf_showwavespic; extern const AVFilter ff_vaf_spectrumsynth; +extern const AVFilter ff_sf_stripstyles; extern const AVFilter ff_sf_textmod; extern const AVFilter ff_svf_graphicsub2video; extern const AVFilter ff_svf_textsub2video; diff --git a/libavfilter/sf_stripstyles.c b/libavfilter/sf_stripstyles.c new file mode 100644 index 0000000000..20e42b47e0 --- /dev/null +++ b/libavfilter/sf_stripstyles.c @@ -0,0 +1,215 @@ +/* + * Copyright (c) 2021 softworkz + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * text subtitle filter which removes inline-styles from subtitles + */ + +#include + +#include "libavutil/avassert.h" +#include "libavutil/opt.h" +#include "avfilter.h" +#include "internal.h" +#include "libavcodec/avcodec.h" +#include "libavcodec/ass_split.h" + +typedef struct StripStylesContext { + const AVClass *class; + enum AVSubtitleType format; + int remove_animated; +} StripStylesContext; + +typedef struct DialogContext { + const AVClass *class; + const StripStylesContext* ss_ctx; + AVBPrint buffer; + int drawing_scale; + int is_animated; +} DialogContext; + +static void dialog_text_cb(void *priv, const char *text, int len) +{ + DialogContext *s = priv; + if (!s->drawing_scale && (!s->is_animated || !s->ss_ctx->remove_animated)) + av_bprint_append_data(&s->buffer, text, len); +} + +static void dialog_new_line_cb(void *priv, int forced) +{ + DialogContext *s = priv; + if (!s->drawing_scale && !s->is_animated) + av_bprint_append_data(&s->buffer, forced ? "\\N" : "\\n", 2); +} + +static void dialog_drawing_mode_cb(void *priv, int scale) +{ + DialogContext *s = priv; + s->drawing_scale = scale; +} + +static void dialog_animate_cb(void *priv, int t1, int t2, int accel, char *style) +{ + DialogContext *s = priv; + s->is_animated = 1; +} + +static void dialog_move_cb(void *priv, int x1, int y1, int x2, int y2, int t1, int t2) +{ + DialogContext *s = priv; + if (t1 >= 0 || t2 >= 0) + s->is_animated = 1; +} + +static const ASSCodesCallbacks dialog_callbacks = { + .text = dialog_text_cb, + .new_line = dialog_new_line_cb, + .drawing_mode = dialog_drawing_mode_cb, + .animate = dialog_animate_cb, + .move = dialog_move_cb, +}; + +static int query_formats(AVFilterContext *ctx) +{ + AVFilterFormats *formats; + AVFilterLink *inlink = ctx->inputs[0]; + AVFilterLink *outlink = ctx->outputs[0]; + static const enum AVSubtitleType subtitle_fmts[] = { AV_SUBTITLE_FMT_ASS, AV_SUBTITLE_FMT_NONE }; + int ret; + + /* set input subtitle format */ + formats = ff_make_format_list(subtitle_fmts); + if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0) + return ret; + + /* set output video format */ + if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0) + return ret; + + return 0; +} + +static char *ass_get_line(int readorder, int layer, const char *style, + const char *speaker, const char *effect, const char *text) +{ + return av_asprintf("%d,%d,%s,%s,0,0,0,%s,%s", + readorder, layer, style ? style : "Default", + speaker ? speaker : "", effect, text); +} + +static char *process_dialog(StripStylesContext *s, const char *ass_line) +{ + ASSDialog *dialog = ff_ass_split_dialog(NULL, ass_line); + char *result = NULL, *text; + DialogContext dlg_ctx = { 0 }; + + if (!dialog) + return NULL; + + dlg_ctx.ss_ctx = s; + + av_bprint_init(&dlg_ctx.buffer, 0, AV_BPRINT_SIZE_UNLIMITED); + + ff_ass_split_override_codes(&dialog_callbacks, &dlg_ctx, dialog->text); + + av_bprint_finalize(&dlg_ctx.buffer, &text); + + if (text && strlen(text) > 0) + result = ass_get_line(dialog->readorder, dialog->layer, dialog->style, dialog->name, dialog->effect, text); + + av_free(text); + ff_ass_free_dialog(&dialog); + + return result; +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *src_frame) +{ + StripStylesContext *s = inlink->dst->priv; + AVFilterLink *outlink = inlink->dst->outputs[0]; + AVFrame *out; + + outlink->format = inlink->format; + + out = av_frame_clone(src_frame); + if (!out) + return AVERROR(ENOMEM); + + for (unsigned i = 0; i < out->num_subtitle_rects; i++) { + + AVSubtitleRect *rect = out->subtitle_rects[i]; + + if (rect->ass) { + if (rect->ass) { + char *tmp = rect->ass; + rect->ass = process_dialog(s, rect->ass); + + if (rect->ass) { + av_log(inlink->dst, AV_LOG_DEBUG, "original: %s\n", tmp); + av_log(inlink->dst, AV_LOG_DEBUG, "stripped: %s\n", rect->ass); + } + else + rect->ass = av_strdup(""); + + av_free(tmp); + } + } + } + + av_frame_free(&src_frame); + return ff_filter_frame(outlink, out); +} + +#define OFFSET(x) offsetof(StripStylesContext, x) +#define FLAGS (AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_FILTERING_PARAM) + +static const AVOption stripstyles_options[] = { + { "remove_animated", "remove animated text (default: yes)", OFFSET(remove_animated), AV_OPT_TYPE_BOOL, {.i64 = 1 }, 0, 1, FLAGS, 0 }, + { NULL }, +}; + +AVFILTER_DEFINE_CLASS(stripstyles); + +static const AVFilterPad inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_SUBTITLE, + .filter_frame = filter_frame, + }, +}; + +static const AVFilterPad outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_SUBTITLE, + }, +}; + +const AVFilter ff_sf_stripstyles = { + .name = "stripstyles", + .description = NULL_IF_CONFIG_SMALL("Strip subtitle inline styles"), + .query_formats = query_formats, + .priv_size = sizeof(StripStylesContext), + .priv_class = &stripstyles_class, + FILTER_INPUTS(inputs), + FILTER_OUTPUTS(outputs), +}; +