LXR linux/sound/core/seq/oss/seq_oss

   1/*
   2 * OSS compatible sequencer driver
   3 *
   4 * seq_oss_event.h - OSS event queue record
   5 *
   6 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation; either version 2 of the License, or
  11 * (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21 */
  22
  23#ifndef __SEQ_OSS_EVENT_H
  24#define __SEQ_OSS_EVENT_H
  25
  26#include "seq_oss_device.h"
  27
  28#define SHORT_EVENT_SIZE        4
  29#define LONG_EVENT_SIZE         8
  30
  31/* short event (4bytes) */
  32struct evrec_short {
  33        unsigned char code;
  34        unsigned char parm1;
  35        unsigned char dev;
  36        unsigned char parm2;
  37};
  38        
  39/* short note events (4bytes) */
  40struct evrec_note {
  41        unsigned char code;
  42        unsigned char chn;
  43        unsigned char note;
  44        unsigned char vel;
  45};
  46        
  47/* long timer events (8bytes) */
  48struct evrec_timer {
  49        unsigned char code;
  50        unsigned char cmd;
  51        unsigned char dummy1, dummy2;
  52        unsigned int time;
  53};
  54
  55/* long extended events (8bytes) */
  56struct evrec_extended {
  57        unsigned char code;
  58        unsigned char cmd;
  59        unsigned char dev;
  60        unsigned char chn;
  61        unsigned char p1, p2, p3, p4;
  62};
  63
  64/* long channel events (8bytes) */
  65struct evrec_long {
  66        unsigned char code;
  67        unsigned char dev;
  68        unsigned char cmd;
  69        unsigned char chn;
  70        unsigned char p1, p2;
  71        unsigned short val;
  72};
  73        
  74/* channel voice events (8bytes) */
  75struct evrec_voice {
  76        unsigned char code;
  77        unsigned char dev;
  78        unsigned char cmd;
  79        unsigned char chn;
  80        unsigned char note, parm;
  81        unsigned short dummy;
  82};
  83
  84/* sysex events (8bytes) */
  85struct evrec_sysex {
  86        unsigned char code;
  87        unsigned char dev;
  88        unsigned char buf[6];
  89};
  90
  91/* event record */
  92union evrec {
  93        struct evrec_short s;
  94        struct evrec_note n;
  95        struct evrec_long l;
  96        struct evrec_voice v;
  97        struct evrec_timer t;
  98        struct evrec_extended e;
  99        struct evrec_sysex x;
 100        unsigned int echo;
 101        unsigned char c[LONG_EVENT_SIZE];
 102};
 103
 104#define ev_is_long(ev) ((ev)->s.code >= 128)
 105#define ev_length(ev) ((ev)->s.code >= 128 ? LONG_EVENT_SIZE : SHORT_EVENT_SIZE)
 106
 107int snd_seq_oss_process_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev);
 108int snd_seq_oss_process_timer_event(struct seq_oss_timer *rec, union evrec *q);
 109int snd_seq_oss_event_input(struct snd_seq_event *ev, int direct, void *private_data, int atomic, int hop);
 110
 111
 112#endif /* __SEQ_OSS_EVENT_H */
 113