include/sound/seq_virmidi.h

   1 #ifndef __SOUND_SEQ_VIRMIDI_H
   2 #define __SOUND_SEQ_VIRMIDI_H
   3
   4 /*
   5  *  Virtual Raw MIDI client on Sequencer
   6  *  Copyright (c) 2000 by Takashi Iwai <tiwai@suse.de>,
   7  *                        Jaroslav Kysela <perex@perex.cz>
   8  *
   9  *   This program is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU General Public License as published by
  11  *   the Free Software Foundation; either version 2 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This program is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with this program; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  *
  23  */
  24
  25 #include <sound/rawmidi.h>
  26 #include <sound/seq_midi_event.h>
  27
  28 /*
  29  * device file instance:
  30  * This instance is created at each time the midi device file is
  31  * opened.  Each instance has its own input buffer and MIDI parser
  32  * (buffer), and is associated with the device instance.
  33  */
  34 struct snd_virmidi {
  35         struct list_head list;
  36         int seq_mode;
  37         int client;
  38         int port;
  39         bool trigger;
  40         struct snd_midi_event *parser;
  41         struct snd_seq_event event;
  42         struct snd_virmidi_dev *rdev;
  43         struct snd_rawmidi_substream *substream;
  44         struct work_struct output_work;
  45 };
  46
  47 #define SNDRV_VIRMIDI_SUBSCRIBE         (1<<0)
  48 #define SNDRV_VIRMIDI_USE               (1<<1)
  49
  50 /*
  51  * device record:
  52  * Each virtual midi device has one device instance.  It contains
  53  * common information and the linked-list of opened files,
  54  */
  55 struct snd_virmidi_dev {
  56         struct snd_card *card;          /* associated card */
  57         struct snd_rawmidi *rmidi;              /* rawmidi device */
  58         int seq_mode;                   /* SNDRV_VIRMIDI_XXX */
  59         int device;                     /* sequencer device */
  60         int client;                     /* created/attached client */
  61         int port;                       /* created/attached port */
  62         unsigned int flags;             /* SNDRV_VIRMIDI_* */
  63         rwlock_t filelist_lock;
  64         struct rw_semaphore filelist_sem;
  65         struct list_head filelist;
  66 };
  67
  68 /* sequencer mode:
  69  * ATTACH = input/output events from midi device are routed to the
  70  *          attached sequencer port.  sequencer port is not created
  71  *          by virmidi itself.
  72  *          the input to rawmidi must be processed by passing the
  73  *          incoming events via snd_virmidi_receive()
  74  * DISPATCH = input/output events are routed to subscribers.
  75  *            sequencer port is created in virmidi.
  76  */
  77 #define SNDRV_VIRMIDI_SEQ_NONE          0
  78 #define SNDRV_VIRMIDI_SEQ_ATTACH        1
  79 #define SNDRV_VIRMIDI_SEQ_DISPATCH      2
  80
  81 int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi);
  82
  83 #endif /* __SOUND_SEQ_VIRMIDI */