blob: 9a9de05f056e3b13713436be1a7cc91b55533d25
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 "bsf.h" |
30 | #include "bytestream.h" |
31 | |
32 | |
33 | static int imx_dump_header(AVBSFContext *ctx, AVPacket *out) |
34 | { |
35 | /* MXF essence element key */ |
36 | static const uint8_t imx_header[16] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x05,0x01,0x01,0x00 }; |
37 | |
38 | AVPacket *in; |
39 | int ret = 0; |
40 | uint8_t *out_buf; |
41 | |
42 | ret = ff_bsf_get_packet(ctx, &in); |
43 | if (ret < 0) |
44 | return ret; |
45 | |
46 | ret = av_new_packet(out, in->size + 20); |
47 | if (ret < 0) |
48 | goto fail; |
49 | |
50 | out_buf = out->data; |
51 | |
52 | bytestream_put_buffer(&out_buf, imx_header, 16); |
53 | bytestream_put_byte(&out_buf, 0x83); /* KLV BER long form */ |
54 | bytestream_put_be24(&out_buf, in->size); |
55 | bytestream_put_buffer(&out_buf, in->data, in->size); |
56 | |
57 | ret = av_packet_copy_props(out, in); |
58 | if (ret < 0) |
59 | goto fail; |
60 | |
61 | fail: |
62 | if (ret < 0) |
63 | av_packet_unref(out); |
64 | av_packet_free(&in); |
65 | return ret; |
66 | } |
67 | |
68 | static const enum AVCodecID codec_ids[] = { |
69 | AV_CODEC_ID_MPEG2VIDEO, AV_CODEC_ID_NONE, |
70 | }; |
71 | |
72 | const AVBitStreamFilter ff_imx_dump_header_bsf = { |
73 | .name = "imxdump", |
74 | .filter = imx_dump_header, |
75 | .codec_ids = codec_ids, |
76 | }; |
77 |