pipewire/src/modules/module-avb/iec61883.h

/* AVB support */
/* SPDX-FileCopyrightText: Copyright © 2022 Wim Taymans */
/* SPDX-License-Identifier: MIT */

#ifndef AVB_IEC61883_H
#define AVB_IEC61883_H

#include "packets.h"

struct avb_packet_iec61883 {
	uint8_t subtype;
#if __BYTE_ORDER == __BIG_ENDIAN
	unsigned sv:1;
	unsigned version:3;
	unsigned mr:1;
	unsigned _r1:1;
	unsigned gv:1;
	unsigned tv:1;

	uint8_t seq_num;

	unsigned _r2:7;
	unsigned tu:1;
#elif __BYTE_ORDER == __LITTLE_ENDIAN
	unsigned tv:1;
	unsigned gv:1;
	unsigned _r1:1;
	unsigned mr:1;
	unsigned version:3;
	unsigned sv:1;

	uint8_t seq_num;

	unsigned tu:1;
	unsigned _r2:7;
#endif
	uint64_t stream_id;
	uint32_t timestamp;
	uint32_t gateway_info;
	uint16_t data_len;
#if __BYTE_ORDER == __BIG_ENDIAN
	uint8_t tag:2;
	uint8_t channel:6;

	uint8_t tcode:4;
	uint8_t app:4;

	uint8_t qi1:2;		/* CIP Quadlet Indicator 1 */
	uint8_t sid:6;		/* CIP Source ID */

	uint8_t dbs;		/* CIP Data Block Size */

	uint8_t fn:2;		/* CIP Fraction Number */
	uint8_t qpc:3;		/* CIP Quadlet Padding Count */
	uint8_t sph:1;		/* CIP Source Packet Header */
	uint8_t _r3:2;

	uint8_t dbc;		/* CIP Data Block Continuity */

	uint8_t qi2:2;		/* CIP Quadlet Indicator 2 */
	uint8_t format_id:6;	/* CIP Format ID */
#elif __BYTE_ORDER == __LITTLE_ENDIAN
	uint8_t channel:6;
	uint8_t tag:2;

	uint8_t app:4;
	uint8_t tcode:4;

	uint8_t sid:6;		/* CIP Source ID */
	uint8_t qi1:2;		/* CIP Quadlet Indicator 1 */

	uint8_t dbs;		/* CIP Data Block Size */

	uint8_t _r3:2;
	uint8_t sph:1;		/* CIP Source Packet Header */
	uint8_t qpc:3;		/* CIP Quadlet Padding Count */
	uint8_t fn:2;		/* CIP Fraction Number */

	uint8_t dbc;		/* CIP Data Block Continuity */

	uint8_t format_id:6;	/* CIP Format ID */
	uint8_t qi2:2;		/* CIP Quadlet Indicator 2 */
#endif
	uint8_t fdf;		/* CIP Format Dependent Field */
        uint16_t syt;

	uint8_t payload[0];
} __attribute__ ((__packed__));

#endif /* AVB_IEC61883_H */