mirror of
https://git.ffmpeg.org/ffmpeg.git
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3fa642d60f
The data does not contain timing or trailing line breaks anymore. In addition to being less idiotic, it is consistent with other codecs and thus allows more switches between formats and codecs. It also fixes the issue of the trailing line returns being simple \n instead of CRLF in the ASS rectangle dialogue (this is the reason of the FATE update).
84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/*
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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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* SubViewer subtitle decoder
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* @see https://en.wikipedia.org/wiki/SubViewer
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*/
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#include "avcodec.h"
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#include "ass.h"
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#include "libavutil/bprint.h"
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static int subviewer_event_to_ass(AVBPrint *buf, const char *p)
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{
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while (*p) {
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if (!strncmp(p, "[br]", 4)) {
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av_bprintf(buf, "\\N");
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p += 4;
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} else {
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if (p[0] == '\n' && p[1])
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av_bprintf(buf, "\\N");
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else if (*p != '\n' && *p != '\r')
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av_bprint_chars(buf, *p, 1);
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p++;
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}
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}
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av_bprintf(buf, "\r\n");
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return 0;
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}
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static int subviewer_decode_frame(AVCodecContext *avctx,
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void *data, int *got_sub_ptr, AVPacket *avpkt)
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{
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char c;
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AVSubtitle *sub = data;
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const char *ptr = avpkt->data;
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AVBPrint buf;
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/* To be removed later */
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if (sscanf(ptr, "%*u:%*u:%*u.%*u,%*u:%*u:%*u.%*u%c", &c) == 1) {
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av_log(avctx, AV_LOG_ERROR, "AVPacket is not clean (contains timing "
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"information). You need to upgrade your libavformat or "
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"sanitize your packet.\n");
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return AVERROR_INVALIDDATA;
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}
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av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
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// note: no need to rescale pts & duration since they are in the same
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// timebase as ASS (1/100)
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if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr))
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ff_ass_add_rect(sub, buf.str, avpkt->pts, avpkt->duration, 0);
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*got_sub_ptr = sub->num_rects > 0;
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av_bprint_finalize(&buf, NULL);
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return avpkt->size;
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}
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AVCodec ff_subviewer_decoder = {
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.name = "subviewer",
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.long_name = NULL_IF_CONFIG_SMALL("SubViewer subtitle"),
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.type = AVMEDIA_TYPE_SUBTITLE,
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.id = AV_CODEC_ID_SUBVIEWER,
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.decode = subviewer_decode_frame,
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.init = ff_ass_subtitle_header_default,
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};
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