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61 lines
2.1 KiB
61 lines
2.1 KiB
/* |
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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 != AV_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 + AV_INPUT_BUFFER_PADDING_SIZE); |
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if (!*poutbuf) |
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return AVERROR(ENOMEM); |
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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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};
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