2 * Copyright (c) 2008 Reimar Döffinger
4 * This file is part of FFmpeg.
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.
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.
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
21 #include "libavutil/common.h"
22 #include "libavutil/intreadwrite.h"
26 static int text2movsub(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
27 uint8_t **poutbuf, int *poutbuf_size,
28 const uint8_t *buf, int buf_size, int keyframe){
29 if (buf_size > 0xffff) return 0;
30 *poutbuf_size = buf_size + 2;
31 *poutbuf = av_malloc(*poutbuf_size + FF_INPUT_BUFFER_PADDING_SIZE);
33 return AVERROR(ENOMEM);
34 AV_WB16(*poutbuf, buf_size);
35 memcpy(*poutbuf + 2, buf, buf_size);
39 AVBitStreamFilter ff_text2movsub_bsf={
40 .name = "text2movsub",
41 .filter = text2movsub,
44 static int mov2textsub(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
45 uint8_t **poutbuf, int *poutbuf_size,
46 const uint8_t *buf, int buf_size, int keyframe){
47 if (buf_size < 2) return 0;
48 *poutbuf_size = FFMIN(buf_size - 2, AV_RB16(buf));
49 *poutbuf = av_malloc(*poutbuf_size + FF_INPUT_BUFFER_PADDING_SIZE);
51 return AVERROR(ENOMEM);
52 memcpy(*poutbuf, buf + 2, *poutbuf_size);
56 AVBitStreamFilter ff_mov2textsub_bsf={
57 .name = "mov2textsub",
58 .filter = mov2textsub,