aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* IEC 61937 common header
* Copyright (c) 2009 Bartlomiej Wolowiec
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_SPDIF_H
#define AVFORMAT_SPDIF_H
#include <stdint.h>
#include "avformat.h"
#define SYNCWORD1 0xF872
#define SYNCWORD2 0x4E1F
#define BURST_HEADER_SIZE 0x8
enum IEC61937DataType {
IEC61937_AC3 = 0x01, ///< AC-3 data
IEC61937_MPEG1_LAYER1 = 0x04, ///< MPEG-1 layer 1
IEC61937_MPEG1_LAYER23 = 0x05, ///< MPEG-1 layer 2 or 3 data or MPEG-2 without extension
IEC61937_MPEG2_EXT = 0x06, ///< MPEG-2 data with extension
IEC61937_MPEG2_AAC = 0x07, ///< MPEG-2 AAC ADTS
IEC61937_MPEG2_LAYER1_LSF = 0x08, ///< MPEG-2, layer-1 low sampling frequency
IEC61937_MPEG2_LAYER2_LSF = 0x09, ///< MPEG-2, layer-2 low sampling frequency
IEC61937_MPEG2_LAYER3_LSF = 0x0A, ///< MPEG-2, layer-3 low sampling frequency
IEC61937_DTS1 = 0x0B, ///< DTS type I (512 samples)
IEC61937_DTS2 = 0x0C, ///< DTS type II (1024 samples)
IEC61937_DTS3 = 0x0D, ///< DTS type III (2048 samples)
IEC61937_ATRAC = 0x0E, ///< ATRAC data
IEC61937_ATRAC3 = 0x0F, ///< ATRAC3 data
IEC61937_ATRACX = 0x10, ///< ATRAC3+ data
IEC61937_DTSHD = 0x11, ///< DTS HD data
IEC61937_WMAPRO = 0x12, ///< WMA 9 Professional data
IEC61937_MPEG2_AAC_LSF_2048 = 0x13, ///< MPEG-2 AAC ADTS half-rate low sampling frequency
IEC61937_MPEG2_AAC_LSF_4096 = 0x13 | 0x20, ///< MPEG-2 AAC ADTS quarter-rate low sampling frequency
IEC61937_EAC3 = 0x15, ///< E-AC-3 data
IEC61937_TRUEHD = 0x16, ///< TrueHD data
};
static const uint16_t spdif_mpeg_pkt_offset[2][3] = {
//LAYER1 LAYER2 LAYER3
{ 3072, 9216, 4608 }, // MPEG-2 LSF
{ 1536, 4608, 4608 }, // MPEG-1
};
void ff_spdif_bswap_buf16(uint16_t *dst, const uint16_t *src, int w);
int ff_spdif_read_packet(AVFormatContext *s, AVPacket *pkt);
int ff_spdif_probe(const uint8_t *p_buf, int buf_size, enum AVCodecID *codec);
#endif /* AVFORMAT_SPDIF_H */
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