1/* 2 * imx dump header bitstream filter 3 * Copyright (c) 2007 Baptiste Coudurier 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22/** 23 * @file libavcodec/imx_dump_header_bsf.c 24 * imx dump header bitstream filter 25 * modifies bitstream to fit in mov and be decoded by final cut pro decoder 26 */ 27 28#include "avcodec.h" 29#include "bytestream.h" 30 31 32static int imx_dump_header(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, 33 uint8_t **poutbuf, int *poutbuf_size, 34 const uint8_t *buf, int buf_size, int keyframe) 35{ 36 /* MXF essence element key */ 37 static const uint8_t imx_header[16] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x05,0x01,0x01,0x00 }; 38 uint8_t *poutbufp; 39 40 if (avctx->codec_id != CODEC_ID_MPEG2VIDEO) { 41 av_log(avctx, AV_LOG_ERROR, "imx bitstream filter only applies to mpeg2video codec\n"); 42 return 0; 43 } 44 45 *poutbuf = av_malloc(buf_size + 20 + FF_INPUT_BUFFER_PADDING_SIZE); 46 poutbufp = *poutbuf; 47 bytestream_put_buffer(&poutbufp, imx_header, 16); 48 bytestream_put_byte(&poutbufp, 0x83); /* KLV BER long form */ 49 bytestream_put_be24(&poutbufp, buf_size); 50 bytestream_put_buffer(&poutbufp, buf, buf_size); 51 *poutbuf_size = poutbufp - *poutbuf; 52 return 1; 53} 54 55AVBitStreamFilter imx_dump_header_bsf = { 56 "imxdump", 57 0, 58 imx_dump_header, 59}; 60