#ifndef __SOUND_RAWMIDI_H #define __SOUND_RAWMIDI_H /* * Abstract layer for MIDI v1.0 stream * Copyright (c) by Jaroslav Kysela * * * 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 #include #include #include #include #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 */