LXR linux/include/sound/seq

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2#ifndef __SOUND_SEQ_OSS_H
   3#define __SOUND_SEQ_OSS_H
   4
   5/*
   6 * OSS compatible sequencer driver
   7 *
   8 * Copyright (C) 1998,99 Takashi Iwai
   9 */
  10
  11#include <sound/asequencer.h>
  12#include <sound/seq_kernel.h>
  13
  14/*
  15 * argument structure for synthesizer operations
  16 */
  17struct snd_seq_oss_arg {
  18        /* given by OSS sequencer */
  19        int app_index;  /* application unique index */
  20        int file_mode;  /* file mode - see below */
  21        int seq_mode;   /* sequencer mode - see below */
  22
  23        /* following must be initialized in open callback */
  24        struct snd_seq_addr addr;       /* opened port address */
  25        void *private_data;     /* private data for lowlevel drivers */
  26
  27        /* note-on event passing mode: initially given by OSS seq,
  28         * but configurable by drivers - see below
  29         */
  30        int event_passing;
  31};
  32
  33
  34/*
  35 * synthesizer operation callbacks
  36 */
  37struct snd_seq_oss_callback {
  38        struct module *owner;
  39        int (*open)(struct snd_seq_oss_arg *p, void *closure);
  40        int (*close)(struct snd_seq_oss_arg *p);
  41        int (*ioctl)(struct snd_seq_oss_arg *p, unsigned int cmd, unsigned long arg);
  42        int (*load_patch)(struct snd_seq_oss_arg *p, int format, const char __user *buf, int offs, int count);
  43        int (*reset)(struct snd_seq_oss_arg *p);
  44        int (*raw_event)(struct snd_seq_oss_arg *p, unsigned char *data);
  45};
  46
  47/* flag: file_mode */
  48#define SNDRV_SEQ_OSS_FILE_ACMODE               3
  49#define SNDRV_SEQ_OSS_FILE_READ         1
  50#define SNDRV_SEQ_OSS_FILE_WRITE                2
  51#define SNDRV_SEQ_OSS_FILE_NONBLOCK     4
  52
  53/* flag: seq_mode */
  54#define SNDRV_SEQ_OSS_MODE_SYNTH                0
  55#define SNDRV_SEQ_OSS_MODE_MUSIC                1
  56
  57/* flag: event_passing */
  58#define SNDRV_SEQ_OSS_PROCESS_EVENTS    0       /* key == 255 is processed as velocity change */
  59#define SNDRV_SEQ_OSS_PASS_EVENTS               1       /* pass all events to callback */
  60#define SNDRV_SEQ_OSS_PROCESS_KEYPRESS  2       /* key >= 128 will be processed as key-pressure */
  61
  62/* default control rate: fixed */
  63#define SNDRV_SEQ_OSS_CTRLRATE          100
  64
  65/* default max queue length: configurable by module option */
  66#define SNDRV_SEQ_OSS_MAX_QLEN          1024
  67
  68
  69/*
  70 * data pointer to snd_seq_register_device
  71 */
  72struct snd_seq_oss_reg {
  73        int type;
  74        int subtype;
  75        int nvoices;
  76        struct snd_seq_oss_callback oper;
  77        void *private_data;
  78};
  79
  80/* device id */
  81#define SNDRV_SEQ_DEV_ID_OSS            "seq-oss"
  82
  83#endif /* __SOUND_SEQ_OSS_H */
  84