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/common.h" 22#include "libavutil/intreadwrite.h" 23#include "avcodec.h" 24 25 26static 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 37AVBitStreamFilter ff_text2movsub_bsf={ 38 .name = "text2movsub", 39 .filter = 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 ff_mov2textsub_bsf={ 53 .name = "mov2textsub", 54 .filter = mov2textsub, 55}; 56