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ffmpeg / libavcodec / movsub_bsf.c @ 2912e87a

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/*
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 * Copyright (c) 2008 Reimar Döffinger
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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static int text2movsub(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
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                     uint8_t **poutbuf, int *poutbuf_size,
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                     const uint8_t *buf, int buf_size, int keyframe){
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    if (buf_size > 0xffff) return 0;
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    *poutbuf_size = buf_size + 2;
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    *poutbuf = av_malloc(*poutbuf_size + FF_INPUT_BUFFER_PADDING_SIZE);
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    AV_WB16(*poutbuf, buf_size);
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    memcpy(*poutbuf + 2, buf, buf_size);
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    return 1;
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}
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AVBitStreamFilter ff_text2movsub_bsf={
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    "text2movsub",
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    0,
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    text2movsub,
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};
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static int mov2textsub(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
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                     uint8_t **poutbuf, int *poutbuf_size,
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                     const uint8_t *buf, int buf_size, int keyframe){
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    if (buf_size < 2) return 0;
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    *poutbuf_size = FFMIN(buf_size - 2, AV_RB16(buf));
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    *poutbuf = av_malloc(*poutbuf_size + FF_INPUT_BUFFER_PADDING_SIZE);
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    memcpy(*poutbuf, buf + 2, *poutbuf_size);
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    return 1;
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}
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AVBitStreamFilter ff_mov2textsub_bsf={
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    "mov2textsub",
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    0,
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    mov2textsub,
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};