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1/* SPDX-License-Identifier: GPL-2.0-or-later */2#ifndef __SOUND_SEQ_VIRMIDI_H3#define __SOUND_SEQ_VIRMIDI_H4 5/*6 * Virtual Raw MIDI client on Sequencer7 * Copyright (c) 2000 by Takashi Iwai <tiwai@suse.de>,8 * Jaroslav Kysela <perex@perex.cz>9 */10 11#include <sound/rawmidi.h>12#include <sound/seq_midi_event.h>13 14/*15 * device file instance:16 * This instance is created at each time the midi device file is17 * opened. Each instance has its own input buffer and MIDI parser18 * (buffer), and is associated with the device instance.19 */20struct snd_virmidi {21 struct list_head list;22 int seq_mode;23 int client;24 int port;25 bool trigger;26 struct snd_midi_event *parser;27 struct snd_seq_event event;28 struct snd_virmidi_dev *rdev;29 struct snd_rawmidi_substream *substream;30 struct work_struct output_work;31};32 33#define SNDRV_VIRMIDI_SUBSCRIBE (1<<0)34#define SNDRV_VIRMIDI_USE (1<<1)35 36/*37 * device record:38 * Each virtual midi device has one device instance. It contains39 * common information and the linked-list of opened files, 40 */41struct snd_virmidi_dev {42 struct snd_card *card; /* associated card */43 struct snd_rawmidi *rmidi; /* rawmidi device */44 int seq_mode; /* SNDRV_VIRMIDI_XXX */45 int device; /* sequencer device */46 int client; /* created/attached client */47 int port; /* created/attached port */48 unsigned int flags; /* SNDRV_VIRMIDI_* */49 rwlock_t filelist_lock;50 struct rw_semaphore filelist_sem;51 struct list_head filelist;52};53 54/* sequencer mode:55 * ATTACH = input/output events from midi device are routed to the56 * attached sequencer port. sequencer port is not created57 * by virmidi itself.58 * the input to rawmidi must be processed by passing the59 * incoming events via snd_virmidi_receive()60 * DISPATCH = input/output events are routed to subscribers.61 * sequencer port is created in virmidi.62 */63#define SNDRV_VIRMIDI_SEQ_NONE 064#define SNDRV_VIRMIDI_SEQ_ATTACH 165#define SNDRV_VIRMIDI_SEQ_DISPATCH 266 67int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi);68 69#endif /* __SOUND_SEQ_VIRMIDI */70