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