mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-24 03:39:45 +00:00
78 lines
2.4 KiB
C
78 lines
2.4 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
|
|
* 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)
|
|
{
|
|
int ret = 0;
|
|
AVSubtitle *sub = data;
|
|
const char *ptr = avpkt->data;
|
|
AVBPrint buf;
|
|
|
|
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))
|
|
ret = ff_ass_add_rect_bprint(sub, &buf, avpkt->pts, avpkt->duration, 0);
|
|
av_bprint_finalize(&buf, NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
*got_sub_ptr = sub->num_rects > 0;
|
|
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,
|
|
};
|