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Diffstat (limited to 'include/sound/rawmidi.h')
| -rw-r--r-- | include/sound/rawmidi.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/include/sound/rawmidi.h b/include/sound/rawmidi.h new file mode 100644 index 00000000000..3f9db510dee --- /dev/null +++ b/include/sound/rawmidi.h @@ -0,0 +1,180 @@ +#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 */ |