linux/include/sound/seq_oss.h
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   1#ifndef __SOUND_SEQ_OSS_H
   2#define __SOUND_SEQ_OSS_H
   3
   4/*
   5 * OSS compatible sequencer driver
   6 *
   7 * Copyright (C) 1998,99 Takashi Iwai
   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#include "asequencer.h"
  25#include "seq_kernel.h"
  26
  27/*
  28 * argument structure for synthesizer operations
  29 */
  30struct snd_seq_oss_arg {
  31        /* given by OSS sequencer */
  32        int app_index;  /* application unique index */
  33        int file_mode;  /* file mode - see below */
  34        int seq_mode;   /* sequencer mode - see below */
  35
  36        /* following must be initialized in open callback */
  37        struct snd_seq_addr addr;       /* opened port address */
  38        void *private_data;     /* private data for lowlevel drivers */
  39
  40        /* note-on event passing mode: initially given by OSS seq,
  41         * but configurable by drivers - see below
  42         */
  43        int event_passing;
  44};
  45
  46
  47/*
  48 * synthesizer operation callbacks
  49 */
  50struct snd_seq_oss_callback {
  51        struct module *owner;
  52        int (*open)(struct snd_seq_oss_arg *p, void *closure);
  53        int (*close)(struct snd_seq_oss_arg *p);
  54        int (*ioctl)(struct snd_seq_oss_arg *p, unsigned int cmd, unsigned long arg);
  55        int (*load_patch)(struct snd_seq_oss_arg *p, int format, const char __user *buf, int offs, int count);
  56        int (*reset)(struct snd_seq_oss_arg *p);
  57        int (*raw_event)(struct snd_seq_oss_arg *p, unsigned char *data);
  58};
  59
  60/* flag: file_mode */
  61#define SNDRV_SEQ_OSS_FILE_ACMODE               3
  62#define SNDRV_SEQ_OSS_FILE_READ         1
  63#define SNDRV_SEQ_OSS_FILE_WRITE                2
  64#define SNDRV_SEQ_OSS_FILE_NONBLOCK     4
  65
  66/* flag: seq_mode */
  67#define SNDRV_SEQ_OSS_MODE_SYNTH                0
  68#define SNDRV_SEQ_OSS_MODE_MUSIC                1
  69
  70/* flag: event_passing */
  71#define SNDRV_SEQ_OSS_PROCESS_EVENTS    0       /* key == 255 is processed as velocity change */
  72#define SNDRV_SEQ_OSS_PASS_EVENTS               1       /* pass all events to callback */
  73#define SNDRV_SEQ_OSS_PROCESS_KEYPRESS  2       /* key >= 128 will be processed as key-pressure */
  74
  75/* default control rate: fixed */
  76#define SNDRV_SEQ_OSS_CTRLRATE          100
  77
  78/* default max queue length: configurable by module option */
  79#define SNDRV_SEQ_OSS_MAX_QLEN          1024
  80
  81
  82/*
  83 * data pointer to snd_seq_register_device
  84 */
  85struct snd_seq_oss_reg {
  86        int type;
  87        int subtype;
  88        int nvoices;
  89        struct snd_seq_oss_callback oper;
  90        void *private_data;
  91};
  92
  93/* device id */
  94#define SNDRV_SEQ_DEV_ID_OSS            "seq-oss"
  95
  96#endif /* __SOUND_SEQ_OSS_H */
  97
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