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/*
* Copyright (c) 2017, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <errno.h>
#include <stdint.h>
/* AVTP subtypes values. For further information refer to section 4.4.3.2 from
* IEEE 1722-2016 spec.
*/
#define AVTP_SUBTYPE_61883_IIDC 0x00
#define AVTP_SUBTYPE_MMA_STREAM 0x01
#define AVTP_SUBTYPE_AAF 0x02
#define AVTP_SUBTYPE_CVF 0x03
#define AVTP_SUBTYPE_CRF 0x04
#define AVTP_SUBTYPE_TSCF 0x05
#define AVTP_SUBTYPE_SVF 0x06
#define AVTP_SUBTYPE_RVF 0x07
#define AVTP_SUBTYPE_AEF_CONTINUOUS 0x6E
#define AVTP_SUBTYPE_VSF_STREAM 0x6F
#define AVTP_SUBTYPE_EF_STREAM 0x7F
#define AVTP_SUBTYPE_NTSCF 0x82
#define AVTP_SUBTYPE_ESCF 0xEC
#define AVTP_SUBTYPE_EECF 0xED
#define AVTP_SUBTYPE_AEF_DISCRETE 0xEE
#define AVTP_SUBTYPE_ADP 0xFA
#define AVTP_SUBTYPE_AECP 0xFB
#define AVTP_SUBTYPE_ACMP 0xFC
#define AVTP_SUBTYPE_MAAP 0xFE
#define AVTP_SUBTYPE_EF_CONTROL 0xFF
/* XXX: Fields from PDU structs should not be read or written directly since
* they are encoded in Network order which may be different from the Host
* order (see section 3.4.1 from IEEE 1722-2016 spec for further information).
*
* Any read or write operation with PDU structs should be done via getter and
* setter APIs which handle byte order conversion.
*/
struct avtp_common_pdu {
uint32_t subtype_data;
uint8_t pdu_specific[0];
} __attribute__ ((__packed__));
struct avtp_stream_pdu {
uint32_t subtype_data;
uint64_t stream_id;
uint32_t avtp_time;
uint32_t format_specific;
uint32_t packet_info;
uint8_t avtp_payload[0];
} __attribute__ ((__packed__));
enum avtp_field {
AVTP_FIELD_SUBTYPE,
AVTP_FIELD_VERSION,
AVTP_FIELD_MAX,
};
/* Get value from Common AVTPDU field.
* @pdu: Pointer to PDU struct.
* @field: PDU field to be retrieved.
* @val: Pointer to variable which the retrieved value should be saved.
*
* Returns:
* 0: Success.
* -EINVAL: If any argument is invalid.
*/
int avtp_pdu_get(const struct avtp_common_pdu *pdu, enum avtp_field field,
uint32_t *val);
/* Set value from Common AVTPDU field.
* @pdu: Pointer to PDU struct.
* @field: PDU field to be set.
* @val: Value to be set.
*
* Returns:
* 0: Success.
* -EINVAL: If any argument is invalid.
*/
int avtp_pdu_set(struct avtp_common_pdu *pdu, enum avtp_field field,
uint32_t val);
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