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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/include/sound/asequencer.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */

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/*

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 *  Main header file for the ALSA sequencer

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 *  Copyright (c) 1998-1999 by Frank van de Pol <[email protected]>

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 *            (c) 1998-1999 by Jaroslav Kysela <[email protected]>

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 */

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#ifndef __SOUND_ASEQUENCER_H

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#define __SOUND_ASEQUENCER_H

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#include <linux/ioctl.h>

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#include <sound/asound.h>

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#include <uapi/sound/asequencer.h>

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/* helper macro */

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#define snd_seq_event_bounce_ext_data(ev) ((void*)((char *)(ev)->data.ext.ptr + sizeof(struct snd_seq_event_bounce)))

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/*

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 * type check macros

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 */

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/* result events: 0-4 */

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#define snd_seq_ev_is_result_type(ev)	((ev)->type < 5)

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/* channel specific events: 5-19 */

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#define snd_seq_ev_is_channel_type(ev)	((ev)->type >= 5 && (ev)->type < 20)

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/* note events: 5-9 */

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#define snd_seq_ev_is_note_type(ev)	((ev)->type >= 5 && (ev)->type < 10)

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/* control events: 10-19 */

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#define snd_seq_ev_is_control_type(ev)	((ev)->type >= 10 && (ev)->type < 20)

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/* queue control events: 30-39 */

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#define snd_seq_ev_is_queue_type(ev)	((ev)->type >= 30 && (ev)->type < 40)

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/* system status messages */

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#define snd_seq_ev_is_message_type(ev)	((ev)->type >= 60 && (ev)->type < 69)

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/* sample messages */

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#define snd_seq_ev_is_sample_type(ev)	((ev)->type >= 70 && (ev)->type < 79)

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/* user-defined messages */

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#define snd_seq_ev_is_user_type(ev)	((ev)->type >= 90 && (ev)->type < 99)

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/* fixed length events: 0-99 */

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#define snd_seq_ev_is_fixed_type(ev)	((ev)->type < 100)

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/* variable length events: 130-139 */

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#define snd_seq_ev_is_variable_type(ev)	((ev)->type >= 130 && (ev)->type < 140)

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/* reserved for kernel */

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#define snd_seq_ev_is_reserved(ev)	((ev)->type >= 150)

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/* direct dispatched events */

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#define snd_seq_ev_is_direct(ev)	((ev)->queue == SNDRV_SEQ_QUEUE_DIRECT)

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/*

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 * macros to check event flags

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 */

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/* prior events */

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#define snd_seq_ev_is_prior(ev)		(((ev)->flags & SNDRV_SEQ_PRIORITY_MASK) == SNDRV_SEQ_PRIORITY_HIGH)

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/* event length type */

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#define snd_seq_ev_length_type(ev)	((ev)->flags & SNDRV_SEQ_EVENT_LENGTH_MASK)

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#define snd_seq_ev_is_fixed(ev)		(snd_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_FIXED)

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#define snd_seq_ev_is_variable(ev)	(snd_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_VARIABLE)

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#define snd_seq_ev_is_varusr(ev)	(snd_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_VARUSR)

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/* time-stamp type */

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#define snd_seq_ev_timestamp_type(ev)	((ev)->flags & SNDRV_SEQ_TIME_STAMP_MASK)

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#define snd_seq_ev_is_tick(ev)		(snd_seq_ev_timestamp_type(ev) == SNDRV_SEQ_TIME_STAMP_TICK)

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#define snd_seq_ev_is_real(ev)		(snd_seq_ev_timestamp_type(ev) == SNDRV_SEQ_TIME_STAMP_REAL)

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/* time-mode type */

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#define snd_seq_ev_timemode_type(ev)	((ev)->flags & SNDRV_SEQ_TIME_MODE_MASK)

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#define snd_seq_ev_is_abstime(ev)	(snd_seq_ev_timemode_type(ev) == SNDRV_SEQ_TIME_MODE_ABS)

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#define snd_seq_ev_is_reltime(ev)	(snd_seq_ev_timemode_type(ev) == SNDRV_SEQ_TIME_MODE_REL)

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/* check whether the given event is a UMP event */

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#define snd_seq_ev_is_ump(ev) \

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	(IS_ENABLED(CONFIG_SND_SEQ_UMP) && ((ev)->flags & SNDRV_SEQ_EVENT_UMP))

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/* queue sync port */

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#define snd_seq_queue_sync_port(q)	((q) + 16)

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#endif /* __SOUND_ASEQUENCER_H */

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