181 lines
6.1 KiB
C
181 lines
6.1 KiB
C
#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/interrupt.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 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)(snd_rawmidi_substream_t *substream);
|
|
/* defers calls to event [input] or ops->trigger [output] */
|
|
struct tasklet_struct tasklet;
|
|
/* 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 */
|