0,0 → 1,83 |
/* |
* Copyright (c) 2012 Clément Bœsch |
* |
* 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 |
* SubViewer subtitle decoder |
* @see https://en.wikipedia.org/wiki/SubViewer |
*/ |
|
#include "avcodec.h" |
#include "ass.h" |
#include "libavutil/bprint.h" |
|
static int subviewer_event_to_ass(AVBPrint *buf, const char *p) |
{ |
while (*p) { |
if (!strncmp(p, "[br]", 4)) { |
av_bprintf(buf, "\\N"); |
p += 4; |
} else { |
if (p[0] == '\n' && p[1]) |
av_bprintf(buf, "\\N"); |
else if (*p != '\n' && *p != '\r') |
av_bprint_chars(buf, *p, 1); |
p++; |
} |
} |
|
av_bprintf(buf, "\r\n"); |
return 0; |
} |
|
static int subviewer_decode_frame(AVCodecContext *avctx, |
void *data, int *got_sub_ptr, AVPacket *avpkt) |
{ |
char c; |
AVSubtitle *sub = data; |
const char *ptr = avpkt->data; |
AVBPrint buf; |
|
/* To be removed later */ |
if (ptr && sscanf(ptr, "%*u:%*u:%*u.%*u,%*u:%*u:%*u.%*u%c", &c) == 1) { |
av_log(avctx, AV_LOG_ERROR, "AVPacket is not clean (contains timing " |
"information). You need to upgrade your libavformat or " |
"sanitize your packet.\n"); |
return AVERROR_INVALIDDATA; |
} |
|
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); |
// note: no need to rescale pts & duration since they are in the same |
// timebase as ASS (1/100) |
if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr)) |
ff_ass_add_rect(sub, buf.str, avpkt->pts, avpkt->duration, 0); |
*got_sub_ptr = sub->num_rects > 0; |
av_bprint_finalize(&buf, NULL); |
return avpkt->size; |
} |
|
AVCodec ff_subviewer_decoder = { |
.name = "subviewer", |
.long_name = NULL_IF_CONFIG_SMALL("SubViewer subtitle"), |
.type = AVMEDIA_TYPE_SUBTITLE, |
.id = AV_CODEC_ID_SUBVIEWER, |
.decode = subviewer_decode_frame, |
.init = ff_ass_subtitle_header_default, |
}; |