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#ifndef __SOUND_RAWMIDI_H
#define __SOUND_RAWMIDI_H
/*
* Abstract layer for MIDI v1.0 stream
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*
*
* 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 <sound/asound.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/mutex.h>
#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
#include "seq_device.h"
#endif
/*
* Raw MIDI interface
*/
#define SNDRV_RAWMIDI_DEVICES 8
#define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0)
#define SNDRV_RAWMIDI_LFLG_INPUT (1<<1)
#define SNDRV_RAWMIDI_LFLG_OPEN (3<<0)
#define SNDRV_RAWMIDI_LFLG_APPEND (1<<2)
struct snd_rawmidi;
struct snd_rawmidi_substream;
struct snd_seq_port_info;
struct snd_rawmidi_ops {
int (*open) (struct snd_rawmidi_substream * substream);
int (*close) (struct snd_rawmidi_substream * substream);
void (*trigger) (struct snd_rawmidi_substream * substream, int up);
void (*drain) (struct snd_rawmidi_substream * substream);
};
struct snd_rawmidi_global_ops {
int (*dev_register) (struct snd_rawmidi * rmidi);
int (*dev_unregister) (struct snd_rawmidi * rmidi);
void (*get_port_info)(struct snd_rawmidi *rmidi, int number,
struct snd_seq_port_info *info);
};
struct snd_rawmidi_runtime {
unsigned int drain: 1, /* drain stage */
oss: 1; /* OSS compatible mode */
/* midi stream buffer */
unsigned char *buffer; /* buffer for MIDI data */
size_t buffer_size; /* size of buffer */
size_t appl_ptr; /* application pointer */
size_t hw_ptr; /* hardware pointer */
size_t avail_min; /* min avail for wakeup */
size_t avail; /* max used buffer for wakeup */
size_t xruns; /* over/underruns counter */
/* misc */
spinlock_t lock;
wait_queue_head_t sleep;
/* event handler (new bytes, input only) */
void (*event)(struct snd_rawmidi_substream *substream);
/* defers calls to event [input] or ops->trigger [output] */
struct tasklet_struct tasklet;
/* private data */
void *private_data;
void (*private_free)(struct snd_rawmidi_substream *substream);
};
struct snd_rawmidi_substream {
struct list_head list; /* list of all substream for given stream */
int stream; /* direction */
int number; /* substream number */
unsigned int opened: 1, /* open flag */
append: 1, /* append flag (merge more streams) */
active_sensing: 1; /* send active sensing when close */
int use_count; /* use counter (for output) */
size_t bytes;
struct snd_rawmidi *rmidi;
struct snd_rawmidi_str *pstr;
char name[32];
struct snd_rawmidi_runtime *runtime;
/* hardware layer */
struct snd_rawmidi_ops *ops;
};
struct snd_rawmidi_file {
struct snd_rawmidi *rmidi;
struct snd_rawmidi_substream *input;
struct snd_rawmidi_substream *output;
};
struct snd_rawmidi_str {
unsigned int substream_count;
unsigned int substream_opened;
struct list_head substreams;
};
struct snd_rawmidi {
struct snd_card *card;
struct list_head list;
unsigned int device; /* device number */
unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */
char id[64];
char name[80];
#ifdef CONFIG_SND_OSSEMUL
int ossreg;
#endif
struct snd_rawmidi_global_ops *ops;
struct snd_rawmidi_str streams[2];
void *private_data;
void (*private_free) (struct snd_rawmidi *rmidi);
struct mutex open_mutex;
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