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module-avb: extend transport abstraction to stream data path

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Add stream_setup_socket and stream_send ops to avb_transport_ops so the
stream data plane can use the same pluggable transport backend as the
control plane. Move the raw AF_PACKET socket setup from stream.c into
avdecc.c as raw_stream_setup_socket(), and add a raw_stream_send()
wrapper around sendmsg().

Add a stream list (spa_list) to struct server so streams can be iterated
after creation, and add stream_activate_virtual() for lightweight
activation without MRP/MAAP network operations.

Implement loopback stream ops: eventfd-based dummy sockets and no-op
send that discards audio data. This enables virtual AVB nodes that work
without network hardware or privileges.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Christian F.K. Schaller 2026-04-07 17:39:04 -04:00 • committed by Wim Taymans
parent ffa855d76e
commit 14310e66fe
5 changed files with 176 additions and 78 deletions
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14
src/modules/module-avb/internal.h
View file

@ -5,6 +5,8 @@
#ifndef AVB_INTERNAL_H
#define AVB_INTERNAL_H
#include <sys/socket.h>
#include <pipewire/pipewire.h>
#ifdef __cplusplus
@ -17,6 +19,8 @@ struct avb_mrp;
#define AVB_TSN_ETH 0x22f0
#define AVB_BROADCAST_MAC { 0x91, 0xe0, 0xf0, 0x01, 0x00, 0x00 };
struct stream;
struct avb_transport_ops {
int (*setup)(struct server *server);
int (*send_packet)(struct server *server, const uint8_t dest[6],
@ -24,6 +28,11 @@ struct avb_transport_ops {
int (*make_socket)(struct server *server, uint16_t type,
const uint8_t mac[6]);
void (*destroy)(struct server *server);
/* stream data plane ops */
int (*stream_setup_socket)(struct server *server, struct stream *stream);
ssize_t (*stream_send)(struct server *server, struct stream *stream,
struct msghdr *msg, int flags);
};
struct impl {
@ -95,6 +104,7 @@ struct server {
struct spa_hook_list listener_list;
struct spa_list descriptors;
struct spa_list streams;
unsigned debug_messages:1;
@ -163,6 +173,10 @@ int avb_server_make_socket(struct server *server, uint16_t type, const uint8_t m
int avb_server_send_packet(struct server *server, const uint8_t dest[6],
uint16_t type, void *data, size_t size);
int avb_server_stream_setup_socket(struct server *server, struct stream *stream);
ssize_t avb_server_stream_send(struct server *server, struct stream *stream,
struct msghdr *msg, int flags);
struct aecp {
struct server *server;
struct spa_hook server_listener;