| 1 |
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| 2 | #ifndef __SOUND_SEQ_VIRMIDI_H
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| 3 | #define __SOUND_SEQ_VIRMIDI_H
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| 4 |
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| 5 | |
| 6 | * Virtual Raw MIDI client on Sequencer
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| 7 | * Copyright (c) 2000 by Takashi Iwai <[email protected]>,
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| 8 | * Jaroslav Kysela <[email protected]>
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| 9 |
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| 10 |
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| 11 | #include <sound/rawmidi.h>
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| 12 | #include <sound/seq_midi_event.h>
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| 13 |
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| 14 | |
| 15 | * device file instance:
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| 16 | * This instance is created at each time the midi device file is
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| 17 | * opened. Each instance has its own input buffer and MIDI parser
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| 18 | * (buffer), and is associated with the device instance.
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| 19 |
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| 20 | struct snd_virmidi {
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| 21 | struct list_head list;
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| 22 | int seq_mode;
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| 23 | int client;
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| 24 | int port;
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| 25 | bool trigger;
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| 26 | struct snd_midi_event *parser;
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| 27 | struct snd_seq_event event;
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| 28 | struct snd_virmidi_dev *rdev;
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| 29 | struct snd_rawmidi_substream *substream;
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| 30 | struct work_struct output_work;
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| 31 | };
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| 32 |
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| 33 | #define SNDRV_VIRMIDI_SUBSCRIBE (1<<0)
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| 34 | #define SNDRV_VIRMIDI_USE (1<<1)
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| 35 |
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| 36 | |
| 37 | * device record:
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| 38 | * Each virtual midi device has one device instance. It contains
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| 39 | * common information and the linked-list of opened files,
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| 40 |
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| 41 | struct snd_virmidi_dev {
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| 42 | struct snd_card *card;
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| 43 | struct snd_rawmidi *rmidi;
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| 44 | int seq_mode;
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| 45 | int device;
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| 46 | int client;
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| 47 | int port;
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| 48 | unsigned int flags;
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| 49 | struct rw_semaphore filelist_sem;
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| 50 | struct list_head filelist;
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| 51 | };
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| 52 |
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| 53 | |
| 54 | * ATTACH = input/output events from midi device are routed to the
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| 55 | * attached sequencer port. sequencer port is not created
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| 56 | * by virmidi itself.
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| 57 | * the input to rawmidi must be processed by passing the
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| 58 | * incoming events via snd_virmidi_receive()
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| 59 | * DISPATCH = input/output events are routed to subscribers.
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| 60 | * sequencer port is created in virmidi.
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| 61 |
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| 62 | #define SNDRV_VIRMIDI_SEQ_NONE 0
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| 63 | #define SNDRV_VIRMIDI_SEQ_ATTACH 1
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| 64 | #define SNDRV_VIRMIDI_SEQ_DISPATCH 2
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| 65 |
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| 66 | int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi);
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| 67 |
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| 68 | #endif
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