| 1 | /* |
| 2 | * Copyright (c) 2008 Reimar Döffinger |
| 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/common.h" |
| 22 | #include "libavutil/intreadwrite.h" |
| 23 | #include "avcodec.h" |
| 24 | |
| 25 | |
| 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); |
| 32 | AV_WB16(*poutbuf, buf_size); |
| 33 | memcpy(*poutbuf + 2, buf, buf_size); |
| 34 | return 1; |
| 35 | } |
| 36 | |
| 37 | AVBitStreamFilter ff_text2movsub_bsf={ |
| 38 | .name = "text2movsub", |
| 39 | .filter = text2movsub, |
| 40 | }; |
| 41 | |
| 42 | static 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 | |
| 52 | AVBitStreamFilter ff_mov2textsub_bsf={ |
| 53 | .name = "mov2textsub", |
| 54 | .filter = mov2textsub, |
| 55 | }; |