mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
6ed0d95fa2
No subtitle decoder ever modifies the AVPacket given to it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/*
|
|
* 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
|
|
* MPL2 subtitles decoder
|
|
*
|
|
* @see http://web.archive.org/web/20090328040233/http://napisy.ussbrowarek.org/mpl2-eng.html
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "ass.h"
|
|
#include "codec_internal.h"
|
|
#include "libavutil/bprint.h"
|
|
|
|
static int mpl2_event_to_ass(AVBPrint *buf, const char *p)
|
|
{
|
|
if (*p == ' ')
|
|
p++;
|
|
|
|
while (*p) {
|
|
int got_style = 0;
|
|
|
|
while (*p && strchr("/\\_", *p)) {
|
|
if (*p == '/') av_bprintf(buf, "{\\i1}");
|
|
else if (*p == '\\') av_bprintf(buf, "{\\b1}");
|
|
else if (*p == '_') av_bprintf(buf, "{\\u1}");
|
|
got_style = 1;
|
|
p++;
|
|
}
|
|
|
|
while (*p && *p != '|') {
|
|
if (*p != '\r' && *p != '\n')
|
|
av_bprint_chars(buf, *p, 1);
|
|
p++;
|
|
}
|
|
|
|
if (*p == '|') {
|
|
if (got_style)
|
|
av_bprintf(buf, "{\\r}");
|
|
av_bprintf(buf, "\\N");
|
|
p++;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mpl2_decode_frame(AVCodecContext *avctx, AVSubtitle *sub,
|
|
int *got_sub_ptr, const AVPacket *avpkt)
|
|
{
|
|
int ret = 0;
|
|
AVBPrint buf;
|
|
const char *ptr = avpkt->data;
|
|
FFASSDecoderContext *s = avctx->priv_data;
|
|
|
|
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
|
|
if (ptr && avpkt->size > 0 && *ptr && !mpl2_event_to_ass(&buf, ptr))
|
|
ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
|
|
av_bprint_finalize(&buf, NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
*got_sub_ptr = sub->num_rects > 0;
|
|
return avpkt->size;
|
|
}
|
|
|
|
const FFCodec ff_mpl2_decoder = {
|
|
.p.name = "mpl2",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("MPL2 subtitle"),
|
|
.p.type = AVMEDIA_TYPE_SUBTITLE,
|
|
.p.id = AV_CODEC_ID_MPL2,
|
|
FF_CODEC_DECODE_SUB_CB(mpl2_decode_frame),
|
|
.init = ff_ass_subtitle_header_default,
|
|
.flush = ff_ass_decoder_flush,
|
|
.priv_data_size = sizeof(FFASSDecoderContext),
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
|
|
};
|