1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
180 lines
6.1 KiB
C
180 lines
6.1 KiB
C
#ifndef __SOUND_RAWMIDI_H
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#define __SOUND_RAWMIDI_H
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/*
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* Abstract layer for MIDI v1.0 stream
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* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/asound.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock.h>
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#include <linux/wait.h>
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#include <asm/semaphore.h>
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#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
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#include "seq_device.h"
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#endif
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/*
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* Raw MIDI interface
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*/
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typedef enum sndrv_rawmidi_stream snd_rawmidi_stream_t;
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typedef struct sndrv_rawmidi_info snd_rawmidi_info_t;
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typedef struct sndrv_rawmidi_params snd_rawmidi_params_t;
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typedef struct sndrv_rawmidi_status snd_rawmidi_status_t;
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#define SNDRV_RAWMIDI_DEVICES 8
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#define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0)
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#define SNDRV_RAWMIDI_LFLG_INPUT (1<<1)
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#define SNDRV_RAWMIDI_LFLG_OPEN (3<<0)
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#define SNDRV_RAWMIDI_LFLG_APPEND (1<<2)
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#define SNDRV_RAWMIDI_LFLG_NOOPENLOCK (1<<3)
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typedef struct _snd_rawmidi_runtime snd_rawmidi_runtime_t;
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typedef struct _snd_rawmidi_substream snd_rawmidi_substream_t;
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typedef struct _snd_rawmidi_str snd_rawmidi_str_t;
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typedef struct _snd_rawmidi_ops {
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int (*open) (snd_rawmidi_substream_t * substream);
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int (*close) (snd_rawmidi_substream_t * substream);
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void (*trigger) (snd_rawmidi_substream_t * substream, int up);
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void (*drain) (snd_rawmidi_substream_t * substream);
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} snd_rawmidi_ops_t;
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typedef struct _snd_rawmidi_global_ops {
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int (*dev_register) (snd_rawmidi_t * rmidi);
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int (*dev_unregister) (snd_rawmidi_t * rmidi);
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} snd_rawmidi_global_ops_t;
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struct _snd_rawmidi_runtime {
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unsigned int drain: 1, /* drain stage */
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oss: 1; /* OSS compatible mode */
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/* midi stream buffer */
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unsigned char *buffer; /* buffer for MIDI data */
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size_t buffer_size; /* size of buffer */
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size_t appl_ptr; /* application pointer */
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size_t hw_ptr; /* hardware pointer */
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size_t avail_min; /* min avail for wakeup */
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size_t avail; /* max used buffer for wakeup */
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size_t xruns; /* over/underruns counter */
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/* misc */
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spinlock_t lock;
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wait_queue_head_t sleep;
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/* event handler (new bytes, input only) */
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void (*event)(snd_rawmidi_substream_t *substream);
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/* defers calls to event [input] or ops->trigger [output] */
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struct tasklet_struct tasklet;
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/* private data */
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void *private_data;
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void (*private_free)(snd_rawmidi_substream_t *substream);
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};
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struct _snd_rawmidi_substream {
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struct list_head list; /* list of all substream for given stream */
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int stream; /* direction */
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int number; /* substream number */
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unsigned int opened: 1, /* open flag */
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append: 1, /* append flag (merge more streams) */
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active_sensing: 1; /* send active sensing when close */
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int use_count; /* use counter (for output) */
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size_t bytes;
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snd_rawmidi_t *rmidi;
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snd_rawmidi_str_t *pstr;
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char name[32];
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snd_rawmidi_runtime_t *runtime;
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/* hardware layer */
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snd_rawmidi_ops_t *ops;
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};
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typedef struct _snd_rawmidi_file {
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snd_rawmidi_t *rmidi;
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snd_rawmidi_substream_t *input;
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snd_rawmidi_substream_t *output;
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} snd_rawmidi_file_t;
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struct _snd_rawmidi_str {
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unsigned int substream_count;
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unsigned int substream_opened;
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struct list_head substreams;
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};
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struct _snd_rawmidi {
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snd_card_t *card;
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unsigned int device; /* device number */
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unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */
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char id[64];
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char name[80];
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#ifdef CONFIG_SND_OSSEMUL
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int ossreg;
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#endif
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snd_rawmidi_global_ops_t *ops;
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snd_rawmidi_str_t streams[2];
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void *private_data;
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void (*private_free) (snd_rawmidi_t *rmidi);
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struct semaphore open_mutex;
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wait_queue_head_t open_wait;
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snd_info_entry_t *dev;
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snd_info_entry_t *proc_entry;
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#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
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snd_seq_device_t *seq_dev;
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#endif
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};
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/* main rawmidi functions */
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int snd_rawmidi_new(snd_card_t * card, char *id, int device,
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int output_count, int input_count,
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snd_rawmidi_t ** rmidi);
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void snd_rawmidi_set_ops(snd_rawmidi_t * rmidi, int stream, snd_rawmidi_ops_t * ops);
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/* callbacks */
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void snd_rawmidi_receive_reset(snd_rawmidi_substream_t * substream);
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int snd_rawmidi_receive(snd_rawmidi_substream_t * substream, const unsigned char *buffer, int count);
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void snd_rawmidi_transmit_reset(snd_rawmidi_substream_t * substream);
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int snd_rawmidi_transmit_empty(snd_rawmidi_substream_t * substream);
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int snd_rawmidi_transmit_peek(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count);
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int snd_rawmidi_transmit_ack(snd_rawmidi_substream_t * substream, int count);
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int snd_rawmidi_transmit(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count);
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/* main midi functions */
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int snd_rawmidi_info_select(snd_card_t *card, snd_rawmidi_info_t *info);
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int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice, int mode, snd_rawmidi_file_t * rfile);
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int snd_rawmidi_kernel_release(snd_rawmidi_file_t * rfile);
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int snd_rawmidi_output_params(snd_rawmidi_substream_t * substream, snd_rawmidi_params_t * params);
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int snd_rawmidi_input_params(snd_rawmidi_substream_t * substream, snd_rawmidi_params_t * params);
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int snd_rawmidi_drop_output(snd_rawmidi_substream_t * substream);
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int snd_rawmidi_drain_output(snd_rawmidi_substream_t * substream);
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int snd_rawmidi_drain_input(snd_rawmidi_substream_t * substream);
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long snd_rawmidi_kernel_read(snd_rawmidi_substream_t * substream, unsigned char *buf, long count);
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long snd_rawmidi_kernel_write(snd_rawmidi_substream_t * substream, const unsigned char *buf, long count);
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#endif /* __SOUND_RAWMIDI_H */
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