Libav
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00001 /* 00002 * Copyright (c) 2008 Reimar Döffinger 00003 * 00004 * This file is part of FFmpeg. 00005 * 00006 * FFmpeg is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public 00008 * License as published by the Free Software Foundation; either 00009 * version 2.1 of the License, or (at your option) any later version. 00010 * 00011 * FFmpeg is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public 00017 * License along with FFmpeg; if not, write to the Free Software 00018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00019 */ 00020 00021 #include "libavutil/intreadwrite.h" 00022 #include "avcodec.h" 00023 00024 00025 static int text2movsub(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, 00026 uint8_t **poutbuf, int *poutbuf_size, 00027 const uint8_t *buf, int buf_size, int keyframe){ 00028 if (buf_size > 0xffff) return 0; 00029 *poutbuf_size = buf_size + 2; 00030 *poutbuf = av_malloc(*poutbuf_size + FF_INPUT_BUFFER_PADDING_SIZE); 00031 AV_WB16(*poutbuf, buf_size); 00032 memcpy(*poutbuf + 2, buf, buf_size); 00033 return 1; 00034 } 00035 00036 AVBitStreamFilter text2movsub_bsf={ 00037 "text2movsub", 00038 0, 00039 text2movsub, 00040 }; 00041 00042 static int mov2textsub(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, 00043 uint8_t **poutbuf, int *poutbuf_size, 00044 const uint8_t *buf, int buf_size, int keyframe){ 00045 if (buf_size < 2) return 0; 00046 *poutbuf_size = FFMIN(buf_size - 2, AV_RB16(buf)); 00047 *poutbuf = av_malloc(*poutbuf_size + FF_INPUT_BUFFER_PADDING_SIZE); 00048 memcpy(*poutbuf, buf + 2, *poutbuf_size); 00049 return 1; 00050 } 00051 00052 AVBitStreamFilter mov2textsub_bsf={ 00053 "mov2textsub", 00054 0, 00055 mov2textsub, 00056 };