linux/include/sound/seq_virmidi.h
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   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 "rawmidi.h"
  26#include "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 */
  34struct snd_virmidi {
  35        struct list_head list;
  36        int seq_mode;
  37        int client;
  38        int port;
  39        unsigned int trigger: 1;
  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};
  45
  46#define SNDRV_VIRMIDI_SUBSCRIBE         (1<<0)
  47#define SNDRV_VIRMIDI_USE               (1<<1)
  48
  49/*
  50 * device record:
  51 * Each virtual midi device has one device instance.  It contains
  52 * common information and the linked-list of opened files, 
  53 */
  54struct snd_virmidi_dev {
  55        struct snd_card *card;          /* associated card */
  56        struct snd_rawmidi *rmidi;              /* rawmidi device */
  57        int seq_mode;                   /* SNDRV_VIRMIDI_XXX */
  58        int device;                     /* sequencer device */
  59        int client;                     /* created/attached client */
  60        int port;                       /* created/attached port */
  61        unsigned int flags;             /* SNDRV_VIRMIDI_* */
  62        rwlock_t filelist_lock;
  63        struct list_head filelist;
  64};
  65
  66/* sequencer mode:
  67 * ATTACH = input/output events from midi device are routed to the
  68 *          attached sequencer port.  sequencer port is not created
  69 *          by virmidi itself.
  70 *          the input to rawmidi must be processed by passing the
  71 *          incoming events via snd_virmidi_receive()
  72 * DISPATCH = input/output events are routed to subscribers.
  73 *            sequencer port is created in virmidi.
  74 */
  75#define SNDRV_VIRMIDI_SEQ_NONE          0
  76#define SNDRV_VIRMIDI_SEQ_ATTACH        1
  77#define SNDRV_VIRMIDI_SEQ_DISPATCH      2
  78
  79int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi);
  80
  81#endif /* __SOUND_SEQ_VIRMIDI */
  82
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