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 */