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Diffstat (limited to '')
| -rw-r--r-- | include/sound/seq_virmidi.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/include/sound/seq_virmidi.h b/include/sound/seq_virmidi.h new file mode 100644 index 000000000..56a3f38df --- /dev/null +++ b/include/sound/seq_virmidi.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __SOUND_SEQ_VIRMIDI_H +#define __SOUND_SEQ_VIRMIDI_H + +/* + * Virtual Raw MIDI client on Sequencer + * Copyright (c) 2000 by Takashi Iwai <tiwai@suse.de>, + * Jaroslav Kysela <perex@perex.cz> + */ + +#include <sound/rawmidi.h> +#include <sound/seq_midi_event.h> + +/* + * device file instance: + * This instance is created at each time the midi device file is + * opened. Each instance has its own input buffer and MIDI parser + * (buffer), and is associated with the device instance. + */ +struct snd_virmidi { + struct list_head list; + int seq_mode; + int client; + int port; + bool trigger; + struct snd_midi_event *parser; + struct snd_seq_event event; + struct snd_virmidi_dev *rdev; + struct snd_rawmidi_substream *substream; + struct work_struct output_work; +}; + +#define SNDRV_VIRMIDI_SUBSCRIBE (1<<0) +#define SNDRV_VIRMIDI_USE (1<<1) + +/* + * device record: + * Each virtual midi device has one device instance. It contains + * common information and the linked-list of opened files, + */ +struct snd_virmidi_dev { + struct snd_card *card; /* associated card */ + struct snd_rawmidi *rmidi; /* rawmidi device */ + int seq_mode; /* SNDRV_VIRMIDI_XXX */ + int device; /* sequencer device */ + int client; /* created/attached client */ + int port; /* created/attached port */ + unsigned int flags; /* SNDRV_VIRMIDI_* */ + rwlock_t filelist_lock; + struct rw_semaphore filelist_sem; + struct list_head filelist; +}; + +/* sequencer mode: + * ATTACH = input/output events from midi device are routed to the + * attached sequencer port. sequencer port is not created + * by virmidi itself. + * the input to rawmidi must be processed by passing the + * incoming events via snd_virmidi_receive() + * DISPATCH = input/output events are routed to subscribers. + * sequencer port is created in virmidi. + */ +#define SNDRV_VIRMIDI_SEQ_NONE 0 +#define SNDRV_VIRMIDI_SEQ_ATTACH 1 +#define SNDRV_VIRMIDI_SEQ_DISPATCH 2 + +int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi); + +#endif /* __SOUND_SEQ_VIRMIDI */ |