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3ab4a3199c
So far we notify the sequencer client and port changes upon UMP FB changes, but those aren't really corresponding to the UMP updates. e.g. when a FB info gets updated, it's not notified but done only when some of sequencer port attribute is changed. This is no ideal behavior. This patch adds the two new sequencer event types for notifying the UMP EP and FB changes via the announce port. The new event takes snd_seq_ev_ump_notify type data, which is compatible with snd_seq_addr (where the port number is replaced with the block number). The events are sent when the EP and FB info gets updated explicitly via ioctl, or the backend UMP receives the corresponding UMP messages. The sequencer protocol version is bumped to 1.0.5 along with it. Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: https://patch.msgid.link/20250110155943.31578-9-tiwai@suse.de
46 lines
1.7 KiB
C
46 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* ALSA sequencer System Client
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* Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
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*/
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#ifndef __SND_SEQ_SYSTEM_H
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#define __SND_SEQ_SYSTEM_H
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#include <sound/seq_kernel.h>
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/* entry points for broadcasting system events */
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void snd_seq_system_broadcast(int client, int port, int type, bool atomic);
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/* normal system notification event broadcast */
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#define notify_event(client, port, type) \
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snd_seq_system_broadcast(client, port, type, false)
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/* notify UMP EP/FB change event */
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static inline void snd_seq_system_ump_notify(int client, int block, int type,
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bool atomic)
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{
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/* reuse the existing snd_seq_system_broadcast():
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* struct snd_seq_ev_ump_notify is compatible with struct snd_seq_addr
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*/
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snd_seq_system_broadcast(client, block, type, atomic);
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}
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#define snd_seq_system_client_ev_client_start(client) notify_event(client, 0, SNDRV_SEQ_EVENT_CLIENT_START)
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#define snd_seq_system_client_ev_client_exit(client) notify_event(client, 0, SNDRV_SEQ_EVENT_CLIENT_EXIT)
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#define snd_seq_system_client_ev_client_change(client) notify_event(client, 0, SNDRV_SEQ_EVENT_CLIENT_CHANGE)
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#define snd_seq_system_client_ev_port_start(client, port) notify_event(client, port, SNDRV_SEQ_EVENT_PORT_START)
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#define snd_seq_system_client_ev_port_exit(client, port) notify_event(client, port, SNDRV_SEQ_EVENT_PORT_EXIT)
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#define snd_seq_system_client_ev_port_change(client, port) notify_event(client, port, SNDRV_SEQ_EVENT_PORT_CHANGE)
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int snd_seq_system_notify(int client, int port, struct snd_seq_event *ev,
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bool atomic);
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/* register our internal client */
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int snd_seq_system_client_init(void);
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/* unregister our internal client */
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void snd_seq_system_client_done(void);
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#endif
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