1/*
2 * Copyright (c) 2008 Reimar D��ffinger
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include "libavutil/intreadwrite.h"
22#include "avcodec.h"
23
24
25static int text2movsub(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
26                     uint8_t **poutbuf, int *poutbuf_size,
27                     const uint8_t *buf, int buf_size, int keyframe){
28    if (buf_size > 0xffff) return 0;
29    *poutbuf_size = buf_size + 2;
30    *poutbuf = av_malloc(*poutbuf_size + FF_INPUT_BUFFER_PADDING_SIZE);
31    AV_WB16(*poutbuf, buf_size);
32    memcpy(*poutbuf + 2, buf, buf_size);
33    return 1;
34}
35
36AVBitStreamFilter text2movsub_bsf={
37    "text2movsub",
38    0,
39    text2movsub,
40};
41
42static int mov2textsub(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
43                     uint8_t **poutbuf, int *poutbuf_size,
44                     const uint8_t *buf, int buf_size, int keyframe){
45    if (buf_size < 2) return 0;
46    *poutbuf_size = FFMIN(buf_size - 2, AV_RB16(buf));
47    *poutbuf = av_malloc(*poutbuf_size + FF_INPUT_BUFFER_PADDING_SIZE);
48    memcpy(*poutbuf, buf + 2, *poutbuf_size);
49    return 1;
50}
51
52AVBitStreamFilter mov2textsub_bsf={
53    "mov2textsub",
54    0,
55    mov2textsub,
56};
57