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avb: implement streams

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Add in input/output stream, setup the talker/listeners.
Implement IEC61883 audio packets, send and receive data.
Implement talker encoding.

With this, audio can be sent and received from MOTU M64.
This commit is contained in:
Wim Taymans 2022-04-05 18:10:27 +02:00
parent 460cedbc86
commit e0d6b2bb4f
15 changed files with 1083 additions and 94 deletions
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101
src/modules/module-avb/stream.h Normal file
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/* 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_STREAM_H
#define AVB_STREAM_H
#include <sys/socket.h>
#include <sys/types.h>
#include <linux/if_packet.h>
#include <net/if.h>
#include <spa/utils/ringbuffer.h>
#include <spa/param/audio/format.h>
#include <pipewire/pipewire.h>
#define BUFFER_SIZE (1u<<16)
#define BUFFER_MASK (BUFFER_SIZE-1)
struct stream {
struct spa_list link;
struct server *server;
uint16_t direction;
uint16_t index;
const struct descriptor *desc;
uint64_t id;
uint64_t peer_id;
struct pw_stream *stream;
struct spa_hook stream_listener;
uint8_t addr[6];
struct spa_source *source;
int prio;
int mtt;
int t_uncertainty;
uint32_t frames_per_pdu;
int ptime_tolerance;
uint8_t pdu[2048];
size_t hdr_size;
size_t payload_size;
size_t pdu_size;
int64_t pdu_period;
uint8_t pdu_seq;
uint8_t prev_seq;
struct iovec iov[3];
struct sockaddr_ll sock_addr;
struct msghdr msg;
char control[CMSG_SPACE(sizeof(uint64_t))];
struct cmsghdr *cmsg;
struct spa_ringbuffer ring;
void *buffer_data;
size_t buffer_size;
uint64_t format;
uint32_t stride;
struct spa_audio_info info;
struct avb_msrp_attribute *talker_attr;
struct avb_msrp_attribute *listener_attr;
struct avb_mvrp_attribute *vlan_attr;
};
#include "msrp.h"
#include "mvrp.h"
struct stream *server_create_stream(struct server *server,
enum spa_direction direction, uint16_t index);
void stream_destroy(struct stream *stream);
int stream_activate(struct stream *stream, uint64_t now);
int stream_deactivate(struct stream *stream, uint64_t now);
#endif /* AVB_STREAM_H */