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69 lines
2.1 KiB
69 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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#ifndef __SOUND_SEQ_VIRMIDI_H |
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#define __SOUND_SEQ_VIRMIDI_H |
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/* |
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* Virtual Raw MIDI client on Sequencer |
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* Copyright (c) 2000 by Takashi Iwai <[email protected]>, |
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* Jaroslav Kysela <[email protected]> |
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*/ |
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#include <sound/rawmidi.h> |
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#include <sound/seq_midi_event.h> |
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/* |
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* device file instance: |
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* This instance is created at each time the midi device file is |
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* opened. Each instance has its own input buffer and MIDI parser |
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* (buffer), and is associated with the device instance. |
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*/ |
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struct snd_virmidi { |
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struct list_head list; |
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int seq_mode; |
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int client; |
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int port; |
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bool trigger; |
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struct snd_midi_event *parser; |
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struct snd_seq_event event; |
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struct snd_virmidi_dev *rdev; |
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struct snd_rawmidi_substream *substream; |
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struct work_struct output_work; |
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}; |
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#define SNDRV_VIRMIDI_SUBSCRIBE (1<<0) |
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#define SNDRV_VIRMIDI_USE (1<<1) |
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/* |
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* device record: |
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* Each virtual midi device has one device instance. It contains |
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* common information and the linked-list of opened files, |
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*/ |
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struct snd_virmidi_dev { |
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struct snd_card *card; /* associated card */ |
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struct snd_rawmidi *rmidi; /* rawmidi device */ |
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int seq_mode; /* SNDRV_VIRMIDI_XXX */ |
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int device; /* sequencer device */ |
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int client; /* created/attached client */ |
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int port; /* created/attached port */ |
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unsigned int flags; /* SNDRV_VIRMIDI_* */ |
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rwlock_t filelist_lock; |
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struct rw_semaphore filelist_sem; |
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struct list_head filelist; |
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}; |
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/* sequencer mode: |
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* ATTACH = input/output events from midi device are routed to the |
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* attached sequencer port. sequencer port is not created |
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* by virmidi itself. |
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* the input to rawmidi must be processed by passing the |
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* incoming events via snd_virmidi_receive() |
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* DISPATCH = input/output events are routed to subscribers. |
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* sequencer port is created in virmidi. |
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*/ |
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#define SNDRV_VIRMIDI_SEQ_NONE 0 |
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#define SNDRV_VIRMIDI_SEQ_ATTACH 1 |
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#define SNDRV_VIRMIDI_SEQ_DISPATCH 2 |
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int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi); |
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#endif /* __SOUND_SEQ_VIRMIDI */
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