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| 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 |
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