2 * DVD subtitle decoding for ffmpeg
3 * Copyright (c) 2005 Fabrice Bellard.
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 /* parser definition */
24 typedef struct DVDSubParseContext {
30 static int dvdsub_parse_init(AVCodecParserContext *s)
35 static int dvdsub_parse(AVCodecParserContext *s,
36 AVCodecContext *avctx,
37 const uint8_t **poutbuf, int *poutbuf_size,
38 const uint8_t *buf, int buf_size)
40 DVDSubParseContext *pc = s->priv_data;
42 if (pc->packet_index == 0) {
45 pc->packet_len = AV_RB16(buf);
46 av_freep(&pc->packet);
47 pc->packet = av_malloc(pc->packet_len);
50 if (pc->packet_index + buf_size <= pc->packet_len) {
51 memcpy(pc->packet + pc->packet_index, buf, buf_size);
52 pc->packet_index += buf_size;
53 if (pc->packet_index >= pc->packet_len) {
54 *poutbuf = pc->packet;
55 *poutbuf_size = pc->packet_len;
69 static void dvdsub_parse_close(AVCodecParserContext *s)
71 DVDSubParseContext *pc = s->priv_data;
72 av_freep(&pc->packet);
75 AVCodecParser dvdsub_parser = {
76 { CODEC_ID_DVD_SUBTITLE },
77 sizeof(DVDSubParseContext),