Release 4.7 include/sound/rawmidi.h

#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>
#include <linux/workqueue.h>
#include <linux/device.h>

#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
#include <sound/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 pid;


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 {
	
struct snd_rawmidi_substream *substream;
	
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 work_struct event_work;
	/* 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;
	
struct pid *pid;
	/* 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

	
const 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;
	
wait_queue_head_t open_wait;

	
struct device dev;

	
struct snd_info_entry *proc_entry;

#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
	
struct snd_seq_device *seq_dev;
#endif
};

/* main rawmidi functions */

int snd_rawmidi_new(struct snd_card *card, char *id, int device,
		    int output_count, int input_count,
		    struct snd_rawmidi **rmidi);
void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
			 struct snd_rawmidi_ops *ops);

/* callbacks */

int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
			const unsigned char *buffer, int count);
int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream);
int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
			      unsigned char *buffer, int count);
int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count);
int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
			 unsigned char *buffer, int count);
int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
			      unsigned char *buffer, int count);
int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream,
			       int count);

/* main midi functions */

int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
			    int mode, struct snd_rawmidi_file *rfile);
int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile);
int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
			      struct snd_rawmidi_params *params);
int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
			     struct snd_rawmidi_params *params);
int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream);
int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream);
int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream);
long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
			     unsigned char *buf, long count);
long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
			      const unsigned char *buf, long count);

#endif /* __SOUND_RAWMIDI_H */
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jaroslav kysela
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Directory: include/sound

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