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81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
/* Spa AVB support */
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/* SPDX-FileCopyrightText: Copyright © 2022 Wim Taymans */
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/* SPDX-License-Identifier: MIT */
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#ifndef AVB_PACKETS_H
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#define AVB_PACKETS_H
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#include <arpa/inet.h>
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#define AVB_SUBTYPE_61883_IIDC 0x00
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#define AVB_SUBTYPE_MMA_STREAM 0x01
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#define AVB_SUBTYPE_AAF 0x02
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#define AVB_SUBTYPE_CVF 0x03
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#define AVB_SUBTYPE_CRF 0x04
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#define AVB_SUBTYPE_TSCF 0x05
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#define AVB_SUBTYPE_SVF 0x06
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#define AVB_SUBTYPE_RVF 0x07
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#define AVB_SUBTYPE_AEF_CONTINUOUS 0x6E
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#define AVB_SUBTYPE_VSF_STREAM 0x6F
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#define AVB_SUBTYPE_EF_STREAM 0x7F
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#define AVB_SUBTYPE_NTSCF 0x82
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#define AVB_SUBTYPE_ESCF 0xEC
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#define AVB_SUBTYPE_EECF 0xED
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#define AVB_SUBTYPE_AEF_DISCRETE 0xEE
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#define AVB_SUBTYPE_ADP 0xFA
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#define AVB_SUBTYPE_AECP 0xFB
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#define AVB_SUBTYPE_ACMP 0xFC
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#define AVB_SUBTYPE_MAAP 0xFE
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#define AVB_SUBTYPE_EF_CONTROL 0xFF
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struct avb_ethernet_header {
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uint8_t dest[6];
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uint8_t src[6];
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uint16_t type;
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} __attribute__ ((__packed__));
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struct avb_frame_header {
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uint8_t dest[6];
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uint8_t src[6];
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uint16_t type; /* 802.1Q Virtual Lan 0x8100 */
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uint16_t prio_cfi_id;
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uint16_t etype;
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} __attribute__ ((__packed__));
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struct avb_packet_header {
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uint8_t subtype;
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#if __BYTE_ORDER == __BIG_ENDIAN
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unsigned sv:1; /* stream_id valid */
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unsigned version:3;
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unsigned subtype_data1:4;
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unsigned subtype_data2:5;
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unsigned len1:3;
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#elif __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned subtype_data1:4;
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unsigned version:3;
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unsigned sv:1;
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unsigned len1:3;
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unsigned subtype_data2:5;
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#elif
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#error "Unknown byte order"
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#endif
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uint8_t len2:8;
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} __attribute__ ((__packed__));
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#define AVB_PACKET_SET_SUBTYPE(p,v) ((p)->subtype = (v))
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#define AVB_PACKET_SET_SV(p,v) ((p)->sv = (v))
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#define AVB_PACKET_SET_VERSION(p,v) ((p)->version = (v))
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#define AVB_PACKET_SET_SUB1(p,v) ((p)->subtype_data1 = (v))
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#define AVB_PACKET_SET_SUB2(p,v) ((p)->subtype_data2 = (v))
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#define AVB_PACKET_SET_LENGTH(p,v) ((p)->len1 = ((v) >> 8),(p)->len2 = (v))
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#define AVB_PACKET_GET_SUBTYPE(p) ((p)->subtype)
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#define AVB_PACKET_GET_SV(p) ((p)->sv)
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#define AVB_PACKET_GET_VERSION(p) ((p)->version)
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#define AVB_PACKET_GET_SUB1(p) ((p)->subtype_data1)
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#define AVB_PACKET_GET_SUB2(p) ((p)->subtype_data2)
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#define AVB_PACKET_GET_LENGTH(p) ((p)->len1 << 8 | (p)->len2)
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#endif /* AVB_PACKETS_H */
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