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ffmpeg / libavcodec / imx_dump_header_bsf.c @ 2912e87a

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/*
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 * imx dump header bitstream filter
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 * Copyright (c) 2007 Baptiste Coudurier
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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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/**
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 * @file
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 * imx dump header bitstream filter
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 * modifies bitstream to fit in mov and be decoded by final cut pro decoder
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 */
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#include "avcodec.h"
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#include "bytestream.h"
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static int imx_dump_header(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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{
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    /* MXF essence element key */
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    static const uint8_t imx_header[16] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x05,0x01,0x01,0x00 };
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    uint8_t *poutbufp;
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    if (avctx->codec_id != CODEC_ID_MPEG2VIDEO) {
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        av_log(avctx, AV_LOG_ERROR, "imx bitstream filter only applies to mpeg2video codec\n");
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        return 0;
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    }
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    *poutbuf = av_malloc(buf_size + 20 + FF_INPUT_BUFFER_PADDING_SIZE);
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    poutbufp = *poutbuf;
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    bytestream_put_buffer(&poutbufp, imx_header, 16);
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    bytestream_put_byte(&poutbufp, 0x83); /* KLV BER long form */
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    bytestream_put_be24(&poutbufp, buf_size);
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    bytestream_put_buffer(&poutbufp, buf, buf_size);
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    *poutbuf_size = poutbufp - *poutbuf;
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    return 1;
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}
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AVBitStreamFilter ff_imx_dump_header_bsf = {
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    "imxdump",
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    0,
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    imx_dump_header,
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};