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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@suse.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/spinlock.h>
#include <linux/wait.h>
#include <asm/semaphore.h>
#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
#include "seq_device.h"
#endif
/*
* Raw MIDI interface
*/
typedef enum sndrv_rawmidi_stream snd_rawmidi_stream_t;
typedef struct sndrv_rawmidi_info snd_rawmidi_info_t;
typedef struct sndrv_rawmidi_params snd_rawmidi_params_t;
typedef struct sndrv_rawmidi_status snd_rawmidi_status_t;
#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)
#define SNDRV_RAWMIDI_LFLG_NOOPENLOCK (1<<3)
typedef struct _snd_rawmidi_runtime snd_rawmidi_runtime_t;
typedef struct _snd_rawmidi_substream snd_rawmidi_substream_t;
typedef struct _snd_rawmidi_str snd_rawmidi_str_t;
typedef struct _snd_rawmidi_ops {
int (*open) (snd_rawmidi_substream_t * substream);
int (*close) (snd_rawmidi_substream_t * substream);
void (*trigger) (snd_rawmidi_substream_t * substream, int up);
void (*drain) (snd_rawmidi_substream_t * substream);
} snd_rawmidi_ops_t;
typedef struct _snd_rawmidi_global_ops {
int (*dev_register) (snd_rawmidi_t * rmidi);
int (*dev_unregister) (snd_rawmidi_t * rmidi);
} snd_rawmidi_global_ops_t;
struct _snd_rawmidi_runtime {
unsigned int trigger: 1, /* transfer is running */
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 (room [output] or new bytes [input]) */
void (*event)(snd_rawmidi_substream_t *substream);
/* private data */
void *private_data;
void (*private_free)(snd_rawmidi_substream_t *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;
snd_rawmidi_t *rmidi;
snd_rawmidi_str_t *pstr;
char name[32];
snd_rawmidi_runtime_t *runtime;
/* hardware layer */
snd_rawmidi_ops_t *ops;
};
typedef struct _snd_rawmidi_file {
snd_rawmidi_t *rmidi;
snd_rawmidi_substream_t *input;
snd_rawmidi_substream_t *output;
} snd_rawmidi_file_t;
struct _snd_rawmidi_str {
unsigned int substream_count;
unsigned int substream_opened;
struct list_head substreams;
};
struct _snd_rawmidi {
snd_card_t *card;
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
snd_rawmidi_global_ops_t *ops;
snd_rawmidi_str_t streams[2];
void *private_data;
void (*private_free) (snd_rawmidi_t *rmidi);
struct semaphore open_mutex;
wait_queue_head_t open_wait;
snd_info_entry_t *dev;
snd_info_entry_t *proc_entry;
#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
snd_seq_device_t *seq_dev;
#endif
};
/* main rawmidi functions */
int snd_rawmidi_new(snd_card_t * card, char *id, int device,
int output_count, int input_count,
snd_rawmidi_t ** rmidi);
void snd_rawmidi_set_ops(snd_rawmidi_t * rmidi, int stream, snd_rawmidi_ops_t * ops);
/* callbacks */
void snd_rawmidi_receive_reset(snd_rawmidi_substream_t * substream);
int snd_rawmidi_receive(snd_rawmidi_substream_t * substream, const unsigned char *buffer, int count);
void snd_rawmidi_transmit_reset(snd_rawmidi_substream_t * substream);
int snd_rawmidi_transmit_empty(snd_rawmidi_substream_t * substream);
int snd_rawmidi_transmit_peek(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count);
int snd_rawmidi_transmit_ack(snd_rawmidi_substream_t * substream, int count);
int snd_rawmidi_transmit(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count);
/* main midi functions */
int snd_rawmidi_info_select(snd_card_t *card, snd_rawmidi_info_t *info);
int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice, int mode, snd_rawmidi_file_t * rfile);
int snd_rawmidi_kernel_release(snd_rawmidi_file_t * rfile);
int snd_rawmidi_output_params(snd_rawmidi_substream_t * substream, snd_rawmidi_params_t * params);
int snd_rawmidi_input_params(snd_rawmidi_substream_t * substream, snd_rawmidi_params_t * params);
int snd_rawmidi_drop_output(snd_rawmidi_substream_t * substream);
int snd_rawmidi_drain_output(snd_rawmidi_substream_t * substream);
int snd_rawmidi_drain_input(snd_rawmidi_substream_t * substream);
long snd_rawmidi_kernel_read(snd_rawmidi_substream_t * substream, unsigned char *buf, long count);
long snd_rawmidi_kernel_write(snd_rawmidi_substream_t * substream, const unsigned char *buf, long count);
#endif /* __SOUND_RAWMIDI_H */
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