1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef __SOUND_SEQ_VIRMIDI_H 3 #define __SOUND_SEQ_VIRMIDI_H 4 5 /* 6 * Virtual Raw MIDI client on Sequencer 7 * 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 is 17 * opened. Each instance has its own input buffer and MIDI parser 18 * (buffer), and is associated with the device instance. 19 */ 20 struct 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 contains 39 * common information and the linked-list of opened files, 40 */ 41 struct 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 the 56 * attached sequencer port. sequencer port is not created 57 * by virmidi itself. 58 * the input to rawmidi must be processed by passing the 59 * 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 0 64 #define SNDRV_VIRMIDI_SEQ_ATTACH 1 65 #define SNDRV_VIRMIDI_SEQ_DISPATCH 2 66 67 int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi); 68 69 #endif /* __SOUND_SEQ_VIRMIDI */ 70