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seq_oss.h

#ifndef __SOUND_SEQ_OSS_H
#define __SOUND_SEQ_OSS_H

/*
 * OSS compatible sequencer driver
 *
 * Copyright (C) 1998,99 Takashi Iwai
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include "asequencer.h"
#include "seq_kernel.h"

/*
 * type definitions
 */
typedef struct snd_seq_oss_arg_t snd_seq_oss_arg_t;
typedef struct snd_seq_oss_callback_t snd_seq_oss_callback_t;

/*
 * argument structure for synthesizer operations
 */
struct snd_seq_oss_arg_t {
      /* given by OSS sequencer */
      int app_index;    /* application unique index */
      int file_mode;    /* file mode - see below */
      int seq_mode;     /* sequencer mode - see below */

      /* following must be initialized in open callback */
      snd_seq_addr_t addr;    /* opened port address */
      void *private_data;     /* private data for lowlevel drivers */

      /* note-on event passing mode: initially given by OSS seq,
       * but configurable by drivers - see below
       */
      int event_passing;
};


/*
 * synthesizer operation callbacks
 */
struct snd_seq_oss_callback_t {
      struct module *owner;
      int (*open)(snd_seq_oss_arg_t *p, void *closure);
      int (*close)(snd_seq_oss_arg_t *p);
      int (*ioctl)(snd_seq_oss_arg_t *p, unsigned int cmd, unsigned long arg);
      int (*load_patch)(snd_seq_oss_arg_t *p, int format, const char __user *buf, int offs, int count);
      int (*reset)(snd_seq_oss_arg_t *p);
      int (*raw_event)(snd_seq_oss_arg_t *p, unsigned char *data);
};

/* flag: file_mode */
#define SNDRV_SEQ_OSS_FILE_ACMODE         3
#define SNDRV_SEQ_OSS_FILE_READ           1
#define SNDRV_SEQ_OSS_FILE_WRITE          2
#define SNDRV_SEQ_OSS_FILE_NONBLOCK 4

/* flag: seq_mode */
#define SNDRV_SEQ_OSS_MODE_SYNTH          0
#define SNDRV_SEQ_OSS_MODE_MUSIC          1

/* flag: event_passing */
#define SNDRV_SEQ_OSS_PROCESS_EVENTS      0     /* key == 255 is processed as velocity change */
#define SNDRV_SEQ_OSS_PASS_EVENTS         1     /* pass all events to callback */
#define SNDRV_SEQ_OSS_PROCESS_KEYPRESS    2     /* key >= 128 will be processed as key-pressure */

/* default control rate: fixed */
#define SNDRV_SEQ_OSS_CTRLRATE            100

/* default max queue length: configurable by module option */
#define SNDRV_SEQ_OSS_MAX_QLEN            1024


/*
 * data pointer to snd_seq_register_device
 */
typedef struct snd_seq_oss_reg {
      int type;
      int subtype;
      int nvoices;
      snd_seq_oss_callback_t oper;
      void *private_data;
} snd_seq_oss_reg_t;

/* device id */
#define SNDRV_SEQ_DEV_ID_OSS        "seq-oss"

#endif /* __SOUND_SEQ_OSS_H */

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