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

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * OSS compatible sequencer driver
   4 *
   5 * seq_oss_event.h - OSS event queue record
   6 *
   7 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
   8 */
   9
  10#ifndef __SEQ_OSS_EVENT_H
  11#define __SEQ_OSS_EVENT_H
  12
  13#include "seq_oss_device.h"
  14
  15#define SHORT_EVENT_SIZE        4
  16#define LONG_EVENT_SIZE         8
  17
  18/* short event (4bytes) */
  19struct evrec_short {
  20        unsigned char code;
  21        unsigned char parm1;
  22        unsigned char dev;
  23        unsigned char parm2;
  24};
  25        
  26/* short note events (4bytes) */
  27struct evrec_note {
  28        unsigned char code;
  29        unsigned char chn;
  30        unsigned char note;
  31        unsigned char vel;
  32};
  33        
  34/* long timer events (8bytes) */
  35struct evrec_timer {
  36        unsigned char code;
  37        unsigned char cmd;
  38        unsigned char dummy1, dummy2;
  39        unsigned int time;
  40};
  41
  42/* long extended events (8bytes) */
  43struct evrec_extended {
  44        unsigned char code;
  45        unsigned char cmd;
  46        unsigned char dev;
  47        unsigned char chn;
  48        unsigned char p1, p2, p3, p4;
  49};
  50
  51/* long channel events (8bytes) */
  52struct evrec_long {
  53        unsigned char code;
  54        unsigned char dev;
  55        unsigned char cmd;
  56        unsigned char chn;
  57        unsigned char p1, p2;
  58        unsigned short val;
  59};
  60        
  61/* channel voice events (8bytes) */
  62struct evrec_voice {
  63        unsigned char code;
  64        unsigned char dev;
  65        unsigned char cmd;
  66        unsigned char chn;
  67        unsigned char note, parm;
  68        unsigned short dummy;
  69};
  70
  71/* sysex events (8bytes) */
  72struct evrec_sysex {
  73        unsigned char code;
  74        unsigned char dev;
  75        unsigned char buf[6];
  76};
  77
  78/* event record */
  79union evrec {
  80        struct evrec_short s;
  81        struct evrec_note n;
  82        struct evrec_long l;
  83        struct evrec_voice v;
  84        struct evrec_timer t;
  85        struct evrec_extended e;
  86        struct evrec_sysex x;
  87        unsigned int echo;
  88        unsigned char c[LONG_EVENT_SIZE];
  89};
  90
  91#define ev_is_long(ev) ((ev)->s.code >= 128)
  92#define ev_length(ev) ((ev)->s.code >= 128 ? LONG_EVENT_SIZE : SHORT_EVENT_SIZE)
  93
  94int snd_seq_oss_process_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev);
  95int snd_seq_oss_process_timer_event(struct seq_oss_timer *rec, union evrec *q);
  96int snd_seq_oss_event_input(struct snd_seq_event *ev, int direct, void *private_data, int atomic, int hop);
  97
  98
  99#endif /* __SEQ_OSS_EVENT_H */
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