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2ba45a60 DM |
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 | |
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 | ||
32 | static 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 != AV_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 | ||
55 | AVBitStreamFilter ff_imx_dump_header_bsf = { | |
56 | .name = "imxdump", | |
57 | .filter = imx_dump_header, | |
58 | }; |