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bluez5: add spa_bt_iso_io that does the low-level part for ISO

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Add factored out helper for ISO socket I/O.

ISO sockets need synchronization of writes and audio position for
different stream fds in the same isochronous group, and it's easier to
separate out the part that coordinates it.
This commit is contained in:
Pauli Virtanen 2023-03-25 16:58:27 +02:00 • committed by Wim Taymans
parent 0ed124f0fb
commit cec050ac25
5 changed files with 494 additions and 1 deletions
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39
spa/plugins/bluez5/iso-io.h Normal file
View file

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/* Spa Bluez5 ISO I/O */
/* SPDX-FileCopyrightText: Copyright © 2023 Pauli Virtanen */
/* SPDX-License-Identifier: MIT */
#ifndef SPA_BLUEZ5_ISO_IO_H
#define SPA_BLUEZ5_ISO_IO_H
#include <spa/utils/defs.h>
#include <spa/support/loop.h>
#include <spa/support/log.h>
#include <spa/node/io.h>
/**
* ISO I/O.
*
* Synchronizes related writes from different streams in the same group
* to occur at same real time instant (or not at all).
*/
struct spa_bt_iso_io
{
uint64_t now;
uint64_t duration;
uint32_t timestamp;
uint8_t buf[4096];
size_t size;
void *user_data;
};
typedef void (*spa_bt_iso_io_pull_t)(struct spa_bt_iso_io *io);
struct spa_bt_iso_io *spa_bt_iso_io_create(int fd, bool sink, struct spa_log *log,
struct spa_loop *data_loop, struct spa_system *data_system);
struct spa_bt_iso_io *spa_bt_iso_io_attach(struct spa_bt_iso_io *io, int fd, bool sink);
void spa_bt_iso_io_destroy(struct spa_bt_iso_io *io);
void spa_bt_iso_io_set_cb(struct spa_bt_iso_io *io, spa_bt_iso_io_pull_t pull, void *user_data);
#endif