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Diffstat (limited to '')
| -rw-r--r-- | src/modules/module-avb/packets.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/modules/module-avb/packets.h b/src/modules/module-avb/packets.h new file mode 100644 index 0000000..f35738a --- /dev/null +++ b/src/modules/module-avb/packets.h @@ -0,0 +1,101 @@ +/* Spa AVB support + * + * Copyright © 2022 Wim Taymans + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifndef AVB_PACKETS_H +#define AVB_PACKETS_H + +#include <arpa/inet.h> + +#define AVB_SUBTYPE_61883_IIDC 0x00 +#define AVB_SUBTYPE_MMA_STREAM 0x01 +#define AVB_SUBTYPE_AAF 0x02 +#define AVB_SUBTYPE_CVF 0x03 +#define AVB_SUBTYPE_CRF 0x04 +#define AVB_SUBTYPE_TSCF 0x05 +#define AVB_SUBTYPE_SVF 0x06 +#define AVB_SUBTYPE_RVF 0x07 +#define AVB_SUBTYPE_AEF_CONTINUOUS 0x6E +#define AVB_SUBTYPE_VSF_STREAM 0x6F +#define AVB_SUBTYPE_EF_STREAM 0x7F +#define AVB_SUBTYPE_NTSCF 0x82 +#define AVB_SUBTYPE_ESCF 0xEC +#define AVB_SUBTYPE_EECF 0xED +#define AVB_SUBTYPE_AEF_DISCRETE 0xEE +#define AVB_SUBTYPE_ADP 0xFA +#define AVB_SUBTYPE_AECP 0xFB +#define AVB_SUBTYPE_ACMP 0xFC +#define AVB_SUBTYPE_MAAP 0xFE +#define AVB_SUBTYPE_EF_CONTROL 0xFF + +struct avb_ethernet_header { + uint8_t dest[6]; + uint8_t src[6]; + uint16_t type; +} __attribute__ ((__packed__)); + +struct avb_frame_header { + uint8_t dest[6]; + uint8_t src[6]; + uint16_t type; /* 802.1Q Virtual Lan 0x8100 */ + uint16_t prio_cfi_id; + uint16_t etype; +} __attribute__ ((__packed__)); + +struct avb_packet_header { + uint8_t subtype; +#if __BYTE_ORDER == __BIG_ENDIAN + unsigned sv:1; /* stream_id valid */ + unsigned version:3; + unsigned subtype_data1:4; + + unsigned subtype_data2:5; + unsigned len1:3; +#elif __BYTE_ORDER == __LITTLE_ENDIAN + unsigned subtype_data1:4; + unsigned version:3; + unsigned sv:1; + + unsigned len1:3; + unsigned subtype_data2:5; +#elif +#error "Unknown byte order" +#endif + uint8_t len2:8; +} __attribute__ ((__packed__)); + +#define AVB_PACKET_SET_SUBTYPE(p,v) ((p)->subtype = (v)) +#define AVB_PACKET_SET_SV(p,v) ((p)->sv = (v)) +#define AVB_PACKET_SET_VERSION(p,v) ((p)->version = (v)) +#define AVB_PACKET_SET_SUB1(p,v) ((p)->subtype_data1 = (v)) +#define AVB_PACKET_SET_SUB2(p,v) ((p)->subtype_data2 = (v)) +#define AVB_PACKET_SET_LENGTH(p,v) ((p)->len1 = ((v) >> 8),(p)->len2 = (v)) + +#define AVB_PACKET_GET_SUBTYPE(p) ((p)->subtype) +#define AVB_PACKET_GET_SV(p) ((p)->sv) +#define AVB_PACKET_GET_VERSION(p) ((p)->version) +#define AVB_PACKET_GET_SUB1(p) ((p)->subtype_data1) +#define AVB_PACKET_GET_SUB2(p) ((p)->subtype_data2) +#define AVB_PACKET_GET_LENGTH(p) ((p)->len1 << 8 | (p)->len2) + +#endif /* AVB_PACKETS_H */ |