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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 }, // MPEG2 LSF | |
58 | { 1536, 4608, 4608 }, // MPEG1 | |
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 */ |