Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

#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)

#define SNDRV_RAWMIDI_LFLG_NOOPENLOCK   (1<<3)

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;

        wait_queue_head_t open_wait;

        struct snd_info_entry *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 */

void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream);

int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,

                        const unsigned char *buffer, int count);

void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream);

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);

/* 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 */