blob: 0039fcfe5c3c8dc4fd124f9e1a16d896843b09a6
1 | /* |
2 | * IEC 61937 common header |
3 | * Copyright (c) 2009 Bartlomiej Wolowiec |
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 | #ifndef AVFORMAT_SPDIF_H |
23 | #define AVFORMAT_SPDIF_H |
24 | |
25 | #include <stdint.h> |
26 | #include "avformat.h" |
27 | |
28 | #define SYNCWORD1 0xF872 |
29 | #define SYNCWORD2 0x4E1F |
30 | #define BURST_HEADER_SIZE 0x8 |
31 | |
32 | enum IEC61937DataType { |
33 | IEC61937_AC3 = 0x01, ///< AC-3 data |
34 | IEC61937_MPEG1_LAYER1 = 0x04, ///< MPEG-1 layer 1 |
35 | IEC61937_MPEG1_LAYER23 = 0x05, ///< MPEG-1 layer 2 or 3 data or MPEG-2 without extension |
36 | IEC61937_MPEG2_EXT = 0x06, ///< MPEG-2 data with extension |
37 | IEC61937_MPEG2_AAC = 0x07, ///< MPEG-2 AAC ADTS |
38 | IEC61937_MPEG2_LAYER1_LSF = 0x08, ///< MPEG-2, layer-1 low sampling frequency |
39 | IEC61937_MPEG2_LAYER2_LSF = 0x09, ///< MPEG-2, layer-2 low sampling frequency |
40 | IEC61937_MPEG2_LAYER3_LSF = 0x0A, ///< MPEG-2, layer-3 low sampling frequency |
41 | IEC61937_DTS1 = 0x0B, ///< DTS type I (512 samples) |
42 | IEC61937_DTS2 = 0x0C, ///< DTS type II (1024 samples) |
43 | IEC61937_DTS3 = 0x0D, ///< DTS type III (2048 samples) |
44 | IEC61937_ATRAC = 0x0E, ///< ATRAC data |
45 | IEC61937_ATRAC3 = 0x0F, ///< ATRAC3 data |
46 | IEC61937_ATRACX = 0x10, ///< ATRAC3+ data |
47 | IEC61937_DTSHD = 0x11, ///< DTS HD data |
48 | IEC61937_WMAPRO = 0x12, ///< WMA 9 Professional data |
49 | IEC61937_MPEG2_AAC_LSF_2048 = 0x13, ///< MPEG-2 AAC ADTS half-rate low sampling frequency |
50 | IEC61937_MPEG2_AAC_LSF_4096 = 0x13 | 0x20, ///< MPEG-2 AAC ADTS quarter-rate low sampling frequency |
51 | IEC61937_EAC3 = 0x15, ///< E-AC-3 data |
52 | IEC61937_TRUEHD = 0x16, ///< TrueHD data |
53 | }; |
54 | |
55 | static const uint16_t spdif_mpeg_pkt_offset[2][3] = { |
56 | //LAYER1 LAYER2 LAYER3 |
57 | { 3072, 9216, 4608 }, // MPEG-2 LSF |
58 | { 1536, 4608, 4608 }, // MPEG-1 |
59 | }; |
60 | |
61 | void ff_spdif_bswap_buf16(uint16_t *dst, const uint16_t *src, int w); |
62 | int ff_spdif_read_packet(AVFormatContext *s, AVPacket *pkt); |
63 | int ff_spdif_probe(const uint8_t *p_buf, int buf_size, enum AVCodecID *codec); |
64 | |
65 | #endif /* AVFORMAT_SPDIF_H */ |
66 |