2012-10-14 04:08:30 +03:00
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/*
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* Copyright (c) 2012 Clément Bœsch
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Raw subtitles decoder
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*/
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2022-02-23 14:56:49 +02:00
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#include "config_components.h"
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2012-10-14 04:08:30 +03:00
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#include "avcodec.h"
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#include "ass.h"
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2022-03-16 19:18:28 +02:00
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#include "codec_internal.h"
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2012-10-14 04:08:30 +03:00
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#include "libavutil/bprint.h"
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#include "libavutil/opt.h"
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typedef struct {
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AVClass *class;
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2012-12-28 00:36:47 +03:00
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const char *linebreaks;
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2012-10-14 04:08:30 +03:00
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int keep_ass_markup;
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2016-01-06 14:43:23 +02:00
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int readorder;
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2012-10-14 04:08:30 +03:00
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} TextContext;
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#define OFFSET(x) offsetof(TextContext, x)
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#define SD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM
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static const AVOption options[] = {
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2015-09-11 21:11:36 +02:00
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{ "keep_ass_markup", "Set if ASS tags must be escaped", OFFSET(keep_ass_markup), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags=SD },
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2012-10-14 04:08:30 +03:00
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{ NULL }
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};
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2022-03-30 19:52:41 +02:00
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static int text_decode_frame(AVCodecContext *avctx, AVSubtitle *sub,
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2022-03-30 23:42:44 +02:00
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int *got_sub_ptr, const AVPacket *avpkt)
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2012-10-14 04:08:30 +03:00
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{
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2014-09-20 23:18:50 +03:00
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int ret = 0;
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2012-10-14 04:08:30 +03:00
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AVBPrint buf;
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const char *ptr = avpkt->data;
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2016-01-06 14:43:23 +02:00
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TextContext *text = avctx->priv_data;
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2012-10-14 04:08:30 +03:00
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av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
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2013-10-23 21:03:17 +03:00
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if (ptr && avpkt->size > 0 && *ptr) {
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ff_ass_bprint_text_event(&buf, ptr, avpkt->size, text->linebreaks, text->keep_ass_markup);
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2016-01-06 14:43:23 +02:00
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ret = ff_ass_add_rect(sub, buf.str, text->readorder++, 0, NULL, NULL);
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2012-10-14 04:08:30 +03:00
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}
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av_bprint_finalize(&buf, NULL);
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2014-09-20 23:18:50 +03:00
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if (ret < 0)
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return ret;
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*got_sub_ptr = sub->num_rects > 0;
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2012-10-14 04:08:30 +03:00
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return avpkt->size;
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}
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2016-01-06 14:43:23 +02:00
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static void text_flush(AVCodecContext *avctx)
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{
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TextContext *text = avctx->priv_data;
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2016-02-20 22:27:45 +02:00
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if (!(avctx->flags2 & AV_CODEC_FLAG2_RO_FLUSH_NOOP))
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text->readorder = 0;
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2016-01-06 14:43:23 +02:00
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}
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2021-06-07 16:13:33 +02:00
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static const AVClass textsub_decoder_class = {
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.class_name = "text/vplayer/stl/pjs/subviewer1 decoder",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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2012-12-28 00:36:47 +03:00
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#if CONFIG_TEXT_DECODER
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const FFCodec ff_text_decoder = {
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.p.name = "text",
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.p.long_name = NULL_IF_CONFIG_SMALL("Raw text subtitle"),
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2013-10-04 16:33:20 +03:00
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.priv_data_size = sizeof(TextContext),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_TEXT,
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2022-03-30 23:28:24 +02:00
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FF_CODEC_DECODE_SUB_CB(text_decode_frame),
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2012-10-14 04:08:30 +03:00
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.init = ff_ass_subtitle_header_default,
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.p.priv_class = &textsub_decoder_class,
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2016-01-06 14:43:23 +02:00
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.flush = text_flush,
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2012-10-14 04:08:30 +03:00
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};
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2012-12-28 00:36:47 +03:00
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#endif
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2014-10-20 23:25:39 +03:00
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#if CONFIG_VPLAYER_DECODER || CONFIG_PJS_DECODER || CONFIG_SUBVIEWER1_DECODER || CONFIG_STL_DECODER
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2012-12-28 00:36:47 +03:00
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2012-12-28 07:15:00 +03:00
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static int linebreak_init(AVCodecContext *avctx)
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2012-12-28 00:36:47 +03:00
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{
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TextContext *text = avctx->priv_data;
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text->linebreaks = "|";
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return ff_ass_subtitle_header_default(avctx);
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}
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2012-12-28 07:15:00 +03:00
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#if CONFIG_VPLAYER_DECODER
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2022-03-16 22:09:54 +02:00
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const FFCodec ff_vplayer_decoder = {
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.p.name = "vplayer",
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.p.long_name = NULL_IF_CONFIG_SMALL("VPlayer subtitle"),
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2013-10-04 16:33:20 +03:00
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.priv_data_size = sizeof(TextContext),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_VPLAYER,
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2022-03-30 23:28:24 +02:00
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FF_CODEC_DECODE_SUB_CB(text_decode_frame),
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2012-12-28 07:15:00 +03:00
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.init = linebreak_init,
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.p.priv_class = &textsub_decoder_class,
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2016-01-06 14:43:23 +02:00
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.flush = text_flush,
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2014-10-20 23:25:39 +03:00
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};
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#endif
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#if CONFIG_STL_DECODER
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2022-03-16 22:09:54 +02:00
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const FFCodec ff_stl_decoder = {
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.p.name = "stl",
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.p.long_name = NULL_IF_CONFIG_SMALL("Spruce subtitle format"),
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2014-10-20 23:25:39 +03:00
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.priv_data_size = sizeof(TextContext),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_STL,
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FF_CODEC_DECODE_SUB_CB(text_decode_frame),
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2014-10-20 23:25:39 +03:00
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.init = linebreak_init,
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.p.priv_class = &textsub_decoder_class,
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2016-01-06 14:43:23 +02:00
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.flush = text_flush,
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2012-12-28 00:36:47 +03:00
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};
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#endif
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2012-12-28 07:15:00 +03:00
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#if CONFIG_PJS_DECODER
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const FFCodec ff_pjs_decoder = {
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.p.name = "pjs",
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.p.long_name = NULL_IF_CONFIG_SMALL("PJS subtitle"),
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2013-10-04 16:33:20 +03:00
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.priv_data_size = sizeof(TextContext),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_PJS,
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2022-03-30 23:28:24 +02:00
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FF_CODEC_DECODE_SUB_CB(text_decode_frame),
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2012-12-28 07:15:00 +03:00
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.init = linebreak_init,
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2022-03-16 22:09:54 +02:00
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.p.priv_class = &textsub_decoder_class,
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2016-01-06 14:43:23 +02:00
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.flush = text_flush,
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2012-12-28 07:15:00 +03:00
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};
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#endif
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2012-12-29 02:04:44 +03:00
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#if CONFIG_SUBVIEWER1_DECODER
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const FFCodec ff_subviewer1_decoder = {
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.p.name = "subviewer1",
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.p.long_name = NULL_IF_CONFIG_SMALL("SubViewer1 subtitle"),
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2013-10-04 16:33:20 +03:00
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.priv_data_size = sizeof(TextContext),
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2022-03-16 22:09:54 +02:00
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_SUBVIEWER1,
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FF_CODEC_DECODE_SUB_CB(text_decode_frame),
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2012-12-29 02:04:44 +03:00
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.init = linebreak_init,
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2022-03-16 22:09:54 +02:00
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.p.priv_class = &textsub_decoder_class,
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2016-01-06 14:43:23 +02:00
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.flush = text_flush,
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2012-12-29 02:04:44 +03:00
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};
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#endif
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2012-12-28 07:15:00 +03:00
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#endif /* text subtitles with '|' line break */
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