include/sound/asequencer.h

   1 /*
   2  *  Main header file for the ALSA sequencer
   3  *  Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
   4  *            (c) 1998-1999 by Jaroslav Kysela <perex@suse.cz>
   5  *
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  *
  21  */
  22 #ifndef __SOUND_ASEQUENCER_H
  23 #define __SOUND_ASEQUENCER_H
  24
  25 #ifndef __KERNEL__
  26 #include <linux/ioctl.h>
  27 #endif
  28
  29 #include <sound/asound.h>
  30
  31 /** version of the sequencer */
  32 #define SNDRV_SEQ_VERSION SNDRV_PROTOCOL_VERSION (1, 0, 1)
  33
  34 /**
  35  * definition of sequencer event types
  36  */
  37
  38 /** system messages
  39  * event data type = #sndrv_seq_result_t
  40  */
  41 #define SNDRV_SEQ_EVENT_SYSTEM          0
  42 #define SNDRV_SEQ_EVENT_RESULT          1
  43
  44 /** note messages (channel specific)
  45  * event data type = #sndrv_seq_ev_note
  46  */
  47 #define SNDRV_SEQ_EVENT_NOTE            5
  48 #define SNDRV_SEQ_EVENT_NOTEON          6
  49 #define SNDRV_SEQ_EVENT_NOTEOFF         7
  50 #define SNDRV_SEQ_EVENT_KEYPRESS        8
  51
  52 /** control messages (channel specific)
  53  * event data type = #sndrv_seq_ev_ctrl
  54  */
  55 #define SNDRV_SEQ_EVENT_CONTROLLER      10
  56 #define SNDRV_SEQ_EVENT_PGMCHANGE       11
  57 #define SNDRV_SEQ_EVENT_CHANPRESS       12
  58 #define SNDRV_SEQ_EVENT_PITCHBEND       13      /**< from -8192 to 8191 */
  59 #define SNDRV_SEQ_EVENT_CONTROL14       14      /**< 14 bit controller value */
  60 #define SNDRV_SEQ_EVENT_NONREGPARAM     15      /**< 14 bit NRPN address + 14 bit unsigned value */
  61 #define SNDRV_SEQ_EVENT_REGPARAM        16      /**< 14 bit RPN address + 14 bit unsigned value */
  62
  63 /** synchronisation messages
  64  * event data type = #sndrv_seq_ev_ctrl
  65  */
  66 #define SNDRV_SEQ_EVENT_SONGPOS         20      /* Song Position Pointer with LSB and MSB values */
  67 #define SNDRV_SEQ_EVENT_SONGSEL         21      /* Song Select with song ID number */
  68 #define SNDRV_SEQ_EVENT_QFRAME          22      /* midi time code quarter frame */
  69 #define SNDRV_SEQ_EVENT_TIMESIGN        23      /* SMF Time Signature event */
  70 #define SNDRV_SEQ_EVENT_KEYSIGN         24      /* SMF Key Signature event */
  71
  72 /** timer messages
  73  * event data type = sndrv_seq_ev_queue_control_t
  74  */
  75 #define SNDRV_SEQ_EVENT_START           30      /* midi Real Time Start message */
  76 #define SNDRV_SEQ_EVENT_CONTINUE        31      /* midi Real Time Continue message */
  77 #define SNDRV_SEQ_EVENT_STOP            32      /* midi Real Time Stop message */
  78 #define SNDRV_SEQ_EVENT_SETPOS_TICK     33      /* set tick queue position */
  79 #define SNDRV_SEQ_EVENT_SETPOS_TIME     34      /* set realtime queue position */
  80 #define SNDRV_SEQ_EVENT_TEMPO           35      /* (SMF) Tempo event */
  81 #define SNDRV_SEQ_EVENT_CLOCK           36      /* midi Real Time Clock message */
  82 #define SNDRV_SEQ_EVENT_TICK            37      /* midi Real Time Tick message */
  83 #define SNDRV_SEQ_EVENT_QUEUE_SKEW      38      /* skew queue tempo */
  84
  85 /** others
  86  * event data type = none
  87  */
  88 #define SNDRV_SEQ_EVENT_TUNE_REQUEST    40      /* tune request */
  89 #define SNDRV_SEQ_EVENT_RESET           41      /* reset to power-on state */
  90 #define SNDRV_SEQ_EVENT_SENSING         42      /* "active sensing" event */
  91
  92 /** echo back, kernel private messages
  93  * event data type = any type
  94  */
  95 #define SNDRV_SEQ_EVENT_ECHO            50      /* echo event */
  96 #define SNDRV_SEQ_EVENT_OSS             51      /* OSS raw event */
  97
  98 /** system status messages (broadcast for subscribers)
  99  * event data type = sndrv_seq_addr_t
 100  */
 101 #define SNDRV_SEQ_EVENT_CLIENT_START    60      /* new client has connected */
 102 #define SNDRV_SEQ_EVENT_CLIENT_EXIT     61      /* client has left the system */
 103 #define SNDRV_SEQ_EVENT_CLIENT_CHANGE   62      /* client status/info has changed */
 104 #define SNDRV_SEQ_EVENT_PORT_START      63      /* new port was created */
 105 #define SNDRV_SEQ_EVENT_PORT_EXIT       64      /* port was deleted from system */
 106 #define SNDRV_SEQ_EVENT_PORT_CHANGE     65      /* port status/info has changed */
 107
 108 /** port connection changes
 109  * event data type = sndrv_seq_connect_t
 110  */
 111 #define SNDRV_SEQ_EVENT_PORT_SUBSCRIBED 66      /* ports connected */
 112 #define SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED 67    /* ports disconnected */
 113
 114 /** synthesizer events
 115  * event data type = sndrv_seq_eve_sample_control_t
 116  */
 117 #define SNDRV_SEQ_EVENT_SAMPLE          70      /* sample select */
 118 #define SNDRV_SEQ_EVENT_SAMPLE_CLUSTER  71      /* sample cluster select */
 119 #define SNDRV_SEQ_EVENT_SAMPLE_START    72      /* voice start */
 120 #define SNDRV_SEQ_EVENT_SAMPLE_STOP     73      /* voice stop */
 121 #define SNDRV_SEQ_EVENT_SAMPLE_FREQ     74      /* playback frequency */
 122 #define SNDRV_SEQ_EVENT_SAMPLE_VOLUME   75      /* volume and balance */
 123 #define SNDRV_SEQ_EVENT_SAMPLE_LOOP     76      /* sample loop */
 124 #define SNDRV_SEQ_EVENT_SAMPLE_POSITION 77      /* sample position */
 125 #define SNDRV_SEQ_EVENT_SAMPLE_PRIVATE1 78      /* private (hardware dependent) event */
 126
 127 /** user-defined events with fixed length
 128  * event data type = any
 129  */
 130 #define SNDRV_SEQ_EVENT_USR0            90
 131 #define SNDRV_SEQ_EVENT_USR1            91
 132 #define SNDRV_SEQ_EVENT_USR2            92
 133 #define SNDRV_SEQ_EVENT_USR3            93
 134 #define SNDRV_SEQ_EVENT_USR4            94
 135 #define SNDRV_SEQ_EVENT_USR5            95
 136 #define SNDRV_SEQ_EVENT_USR6            96
 137 #define SNDRV_SEQ_EVENT_USR7            97
 138 #define SNDRV_SEQ_EVENT_USR8            98
 139 #define SNDRV_SEQ_EVENT_USR9            99
 140
 141 /** instrument layer
 142  * variable length data can be passed directly to the driver
 143  */
 144 #define SNDRV_SEQ_EVENT_INSTR_BEGIN     100     /* begin of instrument management */
 145 #define SNDRV_SEQ_EVENT_INSTR_END       101     /* end of instrument management */
 146 #define SNDRV_SEQ_EVENT_INSTR_INFO      102     /* instrument interface info */
 147 #define SNDRV_SEQ_EVENT_INSTR_INFO_RESULT 103   /* result */
 148 #define SNDRV_SEQ_EVENT_INSTR_FINFO     104     /* get format info */
 149 #define SNDRV_SEQ_EVENT_INSTR_FINFO_RESULT 105  /* get format info */
 150 #define SNDRV_SEQ_EVENT_INSTR_RESET     106     /* reset instrument memory */
 151 #define SNDRV_SEQ_EVENT_INSTR_STATUS    107     /* instrument interface status */
 152 #define SNDRV_SEQ_EVENT_INSTR_STATUS_RESULT 108 /* result */
 153 #define SNDRV_SEQ_EVENT_INSTR_PUT       109     /* put instrument to port */
 154 #define SNDRV_SEQ_EVENT_INSTR_GET       110     /* get instrument from port */
 155 #define SNDRV_SEQ_EVENT_INSTR_GET_RESULT 111    /* result */
 156 #define SNDRV_SEQ_EVENT_INSTR_FREE      112     /* free instrument(s) */
 157 #define SNDRV_SEQ_EVENT_INSTR_LIST      113     /* instrument list */
 158 #define SNDRV_SEQ_EVENT_INSTR_LIST_RESULT 114   /* result */
 159 #define SNDRV_SEQ_EVENT_INSTR_CLUSTER   115     /* cluster parameters */
 160 #define SNDRV_SEQ_EVENT_INSTR_CLUSTER_GET 116   /* get cluster parameters */
 161 #define SNDRV_SEQ_EVENT_INSTR_CLUSTER_RESULT 117 /* result */
 162 #define SNDRV_SEQ_EVENT_INSTR_CHANGE    118     /* instrument change */
 163 /* 119-129: reserved */
 164
 165 /* 130-139: variable length events
 166  * event data type = sndrv_seq_ev_ext
 167  * (SNDRV_SEQ_EVENT_LENGTH_VARIABLE must be set)
 168  */
 169 #define SNDRV_SEQ_EVENT_SYSEX           130     /* system exclusive data (variable length) */
 170 #define SNDRV_SEQ_EVENT_BOUNCE          131     /* error event */
 171 /* 132-134: reserved */
 172 #define SNDRV_SEQ_EVENT_USR_VAR0        135
 173 #define SNDRV_SEQ_EVENT_USR_VAR1        136
 174 #define SNDRV_SEQ_EVENT_USR_VAR2        137
 175 #define SNDRV_SEQ_EVENT_USR_VAR3        138
 176 #define SNDRV_SEQ_EVENT_USR_VAR4        139
 177
 178 /* 150-151: kernel events with quote - DO NOT use in user clients */
 179 #define SNDRV_SEQ_EVENT_KERNEL_ERROR    150
 180 #define SNDRV_SEQ_EVENT_KERNEL_QUOTE    151     /* obsolete */
 181
 182 /* 152-191: reserved */
 183
 184 /* 192-254: hardware specific events */
 185
 186 /* 255: special event */
 187 #define SNDRV_SEQ_EVENT_NONE            255
 188
 189
 190 typedef unsigned char sndrv_seq_event_type_t;
 191
 192 /** event address */
 193 struct sndrv_seq_addr {
 194         unsigned char client;   /**< Client number:         0..255, 255 = broadcast to all clients */
 195         unsigned char port;     /**< Port within client:    0..255, 255 = broadcast to all ports */
 196 };
 197
 198 /** port connection */
 199 struct sndrv_seq_connect {
 200         struct sndrv_seq_addr sender;
 201         struct sndrv_seq_addr dest;
 202 };
 203
 204
 205 #define SNDRV_SEQ_ADDRESS_UNKNOWN       253     /* unknown source */
 206 #define SNDRV_SEQ_ADDRESS_SUBSCRIBERS   254     /* send event to all subscribed ports */
 207 #define SNDRV_SEQ_ADDRESS_BROADCAST     255     /* send event to all queues/clients/ports/channels */
 208 #define SNDRV_SEQ_QUEUE_DIRECT          253     /* direct dispatch */
 209
 210         /* event mode flag - NOTE: only 8 bits available! */
 211 #define SNDRV_SEQ_TIME_STAMP_TICK       (0<<0) /* timestamp in clock ticks */
 212 #define SNDRV_SEQ_TIME_STAMP_REAL       (1<<0) /* timestamp in real time */
 213 #define SNDRV_SEQ_TIME_STAMP_MASK       (1<<0)
 214
 215 #define SNDRV_SEQ_TIME_MODE_ABS         (0<<1)  /* absolute timestamp */
 216 #define SNDRV_SEQ_TIME_MODE_REL         (1<<1)  /* relative to current time */
 217 #define SNDRV_SEQ_TIME_MODE_MASK        (1<<1)
 218
 219 #define SNDRV_SEQ_EVENT_LENGTH_FIXED    (0<<2)  /* fixed event size */
 220 #define SNDRV_SEQ_EVENT_LENGTH_VARIABLE (1<<2)  /* variable event size */
 221 #define SNDRV_SEQ_EVENT_LENGTH_VARUSR   (2<<2)  /* variable event size - user memory space */
 222 #define SNDRV_SEQ_EVENT_LENGTH_MASK     (3<<2)
 223
 224 #define SNDRV_SEQ_PRIORITY_NORMAL       (0<<4)  /* normal priority */
 225 #define SNDRV_SEQ_PRIORITY_HIGH         (1<<4)  /* event should be processed before others */
 226 #define SNDRV_SEQ_PRIORITY_MASK         (1<<4)
 227
 228
 229         /* note event */
 230 struct sndrv_seq_ev_note {
 231         unsigned char channel;
 232         unsigned char note;
 233         unsigned char velocity;
 234         unsigned char off_velocity;     /* only for SNDRV_SEQ_EVENT_NOTE */
 235         unsigned int duration;          /* only for SNDRV_SEQ_EVENT_NOTE */
 236 };
 237
 238         /* controller event */
 239 struct sndrv_seq_ev_ctrl {
 240         unsigned char channel;
 241         unsigned char unused1, unused2, unused3;        /* pad */
 242         unsigned int param;
 243         signed int value;
 244 };
 245
 246         /* generic set of bytes (12x8 bit) */
 247 struct sndrv_seq_ev_raw8 {
 248         unsigned char d[12];    /* 8 bit value */
 249 };
 250
 251         /* generic set of integers (3x32 bit) */
 252 struct sndrv_seq_ev_raw32 {
 253         unsigned int d[3];      /* 32 bit value */
 254 };
 255
 256         /* external stored data */
 257 struct sndrv_seq_ev_ext {
 258         unsigned int len;       /* length of data */
 259         void *ptr;              /* pointer to data (note: maybe 64-bit) */
 260 } __attribute__((packed));
 261
 262 /* Instrument cluster type */
 263 typedef unsigned int sndrv_seq_instr_cluster_t;
 264
 265 /* Instrument type */
 266 struct sndrv_seq_instr {
 267         sndrv_seq_instr_cluster_t cluster;
 268         unsigned int std;               /* the upper byte means a private instrument (owner - client #) */
 269         unsigned short bank;
 270         unsigned short prg;
 271 };
 272
 273         /* sample number */
 274 struct sndrv_seq_ev_sample {
 275         unsigned int std;
 276         unsigned short bank;
 277         unsigned short prg;
 278 };
 279
 280         /* sample cluster */
 281 struct sndrv_seq_ev_cluster {
 282         sndrv_seq_instr_cluster_t cluster;
 283 };
 284
 285         /* sample position */
 286 typedef unsigned int sndrv_seq_position_t; /* playback position (in samples) * 16 */
 287
 288         /* sample stop mode */
 289 enum sndrv_seq_stop_mode {
 290         SAMPLE_STOP_IMMEDIATELY = 0,    /* terminate playing immediately */
 291         SAMPLE_STOP_VENVELOPE = 1,      /* finish volume envelope */
 292         SAMPLE_STOP_LOOP = 2            /* terminate loop and finish wave */
 293 };
 294
 295         /* sample frequency */
 296 typedef int sndrv_seq_frequency_t; /* playback frequency in HZ * 16 */
 297
 298         /* sample volume control; if any value is set to -1 == do not change */
 299 struct sndrv_seq_ev_volume {
 300         signed short volume;    /* range: 0-16383 */
 301         signed short lr;        /* left-right balance; range: 0-16383 */
 302         signed short fr;        /* front-rear balance; range: 0-16383 */
 303         signed short du;        /* down-up balance; range: 0-16383 */
 304 };
 305
 306         /* simple loop redefinition */
 307 struct sndrv_seq_ev_loop {
 308         unsigned int start;     /* loop start (in samples) * 16 */
 309         unsigned int end;       /* loop end (in samples) * 16 */
 310 };
 311
 312 struct sndrv_seq_ev_sample_control {
 313         unsigned char channel;
 314         unsigned char unused1, unused2, unused3;        /* pad */
 315         union {
 316                 struct sndrv_seq_ev_sample sample;
 317                 struct sndrv_seq_ev_cluster cluster;
 318                 sndrv_seq_position_t position;
 319                 enum sndrv_seq_stop_mode stop_mode;
 320                 sndrv_seq_frequency_t frequency;
 321                 struct sndrv_seq_ev_volume volume;
 322                 struct sndrv_seq_ev_loop loop;
 323                 unsigned char raw8[8];
 324         } param;
 325 };
 326
 327
 328
 329 /* INSTR_BEGIN event */
 330 struct sndrv_seq_ev_instr_begin {
 331         int timeout;            /* zero = forever, otherwise timeout in ms */
 332 };
 333
 334 struct sndrv_seq_result {
 335         int event;              /* processed event type */
 336         int result;
 337 };
 338
 339
 340 struct sndrv_seq_real_time {
 341         unsigned int tv_sec;    /* seconds */
 342         unsigned int tv_nsec;   /* nanoseconds */
 343 };
 344
 345 typedef unsigned int sndrv_seq_tick_time_t;     /* midi ticks */
 346
 347 union sndrv_seq_timestamp {
 348         sndrv_seq_tick_time_t tick;
 349         struct sndrv_seq_real_time time;
 350 };
 351
 352 struct sndrv_seq_queue_skew {
 353         unsigned int value;
 354         unsigned int base;
 355 };
 356
 357         /* queue timer control */
 358 struct sndrv_seq_ev_queue_control {
 359         unsigned char queue;                    /* affected queue */
 360         unsigned char pad[3];                   /* reserved */
 361         union {
 362                 signed int value;               /* affected value (e.g. tempo) */
 363                 union sndrv_seq_timestamp time; /* time */
 364                 unsigned int position;          /* sync position */
 365                 struct sndrv_seq_queue_skew skew;
 366                 unsigned int d32[2];
 367                 unsigned char d8[8];
 368         } param;
 369 };
 370
 371         /* quoted event - inside the kernel only */
 372 struct sndrv_seq_ev_quote {
 373         struct sndrv_seq_addr origin;           /* original sender */
 374         unsigned short value;           /* optional data */
 375         struct sndrv_seq_event *event;          /* quoted event */
 376 } __attribute__((packed));
 377
 378
 379         /* sequencer event */
 380 struct sndrv_seq_event {
 381         sndrv_seq_event_type_t type;    /* event type */
 382         unsigned char flags;            /* event flags */
 383         char tag;
 384
 385         unsigned char queue;            /* schedule queue */
 386         union sndrv_seq_timestamp time; /* schedule time */
 387
 388
 389         struct sndrv_seq_addr source;   /* source address */
 390         struct sndrv_seq_addr dest;     /* destination address */
 391
 392         union {                         /* event data... */
 393                 struct sndrv_seq_ev_note note;
 394                 struct sndrv_seq_ev_ctrl control;
 395                 struct sndrv_seq_ev_raw8 raw8;
 396                 struct sndrv_seq_ev_raw32 raw32;
 397                 struct sndrv_seq_ev_ext ext;
 398                 struct sndrv_seq_ev_queue_control queue;
 399                 union sndrv_seq_timestamp time;
 400                 struct sndrv_seq_addr addr;
 401                 struct sndrv_seq_connect connect;
 402                 struct sndrv_seq_result result;
 403                 struct sndrv_seq_ev_instr_begin instr_begin;
 404                 struct sndrv_seq_ev_sample_control sample;
 405                 struct sndrv_seq_ev_quote quote;
 406         } data;
 407 };
 408
 409
 410 /*
 411  * bounce event - stored as variable size data
 412  */
 413 struct sndrv_seq_event_bounce {
 414         int err;
 415         struct sndrv_seq_event event;
 416         /* external data follows here. */
 417 };
 418
 419 #define sndrv_seq_event_bounce_ext_data(ev) ((void*)((char *)(ev)->data.ext.ptr + sizeof(sndrv_seq_event_bounce_t)))
 420
 421 /*
 422  * type check macros
 423  */
 424 /* result events: 0-4 */
 425 #define sndrv_seq_ev_is_result_type(ev) ((ev)->type < 5)
 426 /* channel specific events: 5-19 */
 427 #define sndrv_seq_ev_is_channel_type(ev)        ((ev)->type >= 5 && (ev)->type < 20)
 428 /* note events: 5-9 */
 429 #define sndrv_seq_ev_is_note_type(ev)   ((ev)->type >= 5 && (ev)->type < 10)
 430 /* control events: 10-19 */
 431 #define sndrv_seq_ev_is_control_type(ev)        ((ev)->type >= 10 && (ev)->type < 20)
 432 /* queue control events: 30-39 */
 433 #define sndrv_seq_ev_is_queue_type(ev)  ((ev)->type >= 30 && (ev)->type < 40)
 434 /* system status messages */
 435 #define sndrv_seq_ev_is_message_type(ev)        ((ev)->type >= 60 && (ev)->type < 69)
 436 /* sample messages */
 437 #define sndrv_seq_ev_is_sample_type(ev) ((ev)->type >= 70 && (ev)->type < 79)
 438 /* user-defined messages */
 439 #define sndrv_seq_ev_is_user_type(ev)   ((ev)->type >= 90 && (ev)->type < 99)
 440 /* fixed length events: 0-99 */
 441 #define sndrv_seq_ev_is_fixed_type(ev)  ((ev)->type < 100)
 442 /* instrument layer events: 100-129 */
 443 #define sndrv_seq_ev_is_instr_type(ev)  ((ev)->type >= 100 && (ev)->type < 130)
 444 /* variable length events: 130-139 */
 445 #define sndrv_seq_ev_is_variable_type(ev)       ((ev)->type >= 130 && (ev)->type < 140)
 446 /* reserved for kernel */
 447 #define sndrv_seq_ev_is_reserved(ev)    ((ev)->type >= 150)
 448
 449 /* direct dispatched events */
 450 #define sndrv_seq_ev_is_direct(ev)      ((ev)->queue == SNDRV_SEQ_QUEUE_DIRECT)
 451
 452 /*
 453  * macros to check event flags
 454  */
 455 /* prior events */
 456 #define sndrv_seq_ev_is_prior(ev)               (((ev)->flags & SNDRV_SEQ_PRIORITY_MASK) == SNDRV_SEQ_PRIORITY_HIGH)
 457
 458 /* event length type */
 459 #define sndrv_seq_ev_length_type(ev)    ((ev)->flags & SNDRV_SEQ_EVENT_LENGTH_MASK)
 460 #define sndrv_seq_ev_is_fixed(ev)               (sndrv_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_FIXED)
 461 #define sndrv_seq_ev_is_variable(ev)    (sndrv_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_VARIABLE)
 462 #define sndrv_seq_ev_is_varusr(ev)      (sndrv_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_VARUSR)
 463
 464 /* time-stamp type */
 465 #define sndrv_seq_ev_timestamp_type(ev) ((ev)->flags & SNDRV_SEQ_TIME_STAMP_MASK)
 466 #define sndrv_seq_ev_is_tick(ev)                (sndrv_seq_ev_timestamp_type(ev) == SNDRV_SEQ_TIME_STAMP_TICK)
 467 #define sndrv_seq_ev_is_real(ev)                (sndrv_seq_ev_timestamp_type(ev) == SNDRV_SEQ_TIME_STAMP_REAL)
 468
 469 /* time-mode type */
 470 #define sndrv_seq_ev_timemode_type(ev)  ((ev)->flags & SNDRV_SEQ_TIME_MODE_MASK)
 471 #define sndrv_seq_ev_is_abstime(ev)     (sndrv_seq_ev_timemode_type(ev) == SNDRV_SEQ_TIME_MODE_ABS)
 472 #define sndrv_seq_ev_is_reltime(ev)     (sndrv_seq_ev_timemode_type(ev) == SNDRV_SEQ_TIME_MODE_REL)
 473
 474 /* queue sync port */
 475 #define sndrv_seq_queue_sync_port(q)    ((q) + 16)
 476
 477         /* system information */
 478 struct sndrv_seq_system_info {
 479         int queues;                     /* maximum queues count */
 480         int clients;                    /* maximum clients count */
 481         int ports;                      /* maximum ports per client */
 482         int channels;                   /* maximum channels per port */
 483         int cur_clients;                /* current clients */
 484         int cur_queues;                 /* current queues */
 485         char reserved[24];
 486 };
 487
 488
 489         /* system running information */
 490 struct sndrv_seq_running_info {
 491         unsigned char client;           /* client id */
 492         unsigned char big_endian;       /* 1 = big-endian */
 493         unsigned char cpu_mode;         /* 4 = 32bit, 8 = 64bit */
 494         unsigned char pad;              /* reserved */
 495         unsigned char reserved[12];
 496 };
 497
 498
 499         /* known client numbers */
 500 #define SNDRV_SEQ_CLIENT_SYSTEM         0
 501 #define SNDRV_SEQ_CLIENT_DUMMY          62      /* dummy ports */
 502 #define SNDRV_SEQ_CLIENT_OSS            63      /* oss sequencer emulator */
 503
 504
 505         /* client types */
 506 enum sndrv_seq_client_type {
 507         NO_CLIENT       = 0,
 508         USER_CLIENT     = 1,
 509         KERNEL_CLIENT   = 2
 510 };
 511
 512         /* event filter flags */
 513 #define SNDRV_SEQ_FILTER_BROADCAST      (1<<0)  /* accept broadcast messages */
 514 #define SNDRV_SEQ_FILTER_MULTICAST      (1<<1)  /* accept multicast messages */
 515 #define SNDRV_SEQ_FILTER_BOUNCE         (1<<2)  /* accept bounce event in error */
 516 #define SNDRV_SEQ_FILTER_USE_EVENT      (1<<31) /* use event filter */
 517
 518 struct sndrv_seq_client_info {
 519         int client;                     /* client number to inquire */
 520         enum sndrv_seq_client_type type;        /* client type */
 521         char name[64];                  /* client name */
 522         unsigned int filter;            /* filter flags */
 523         unsigned char multicast_filter[8]; /* multicast filter bitmap */
 524         unsigned char event_filter[32]; /* event filter bitmap */
 525         int num_ports;                  /* RO: number of ports */
 526         int event_lost;                 /* number of lost events */
 527         char reserved[64];              /* for future use */
 528 };
 529
 530
 531 /* client pool size */
 532 struct sndrv_seq_client_pool {
 533         int client;                     /* client number to inquire */
 534         int output_pool;                /* outgoing (write) pool size */
 535         int input_pool;                 /* incoming (read) pool size */
 536         int output_room;                /* minimum free pool size for select/blocking mode */
 537         int output_free;                /* unused size */
 538         int input_free;                 /* unused size */
 539         char reserved[64];
 540 };
 541
 542
 543 /* Remove events by specified criteria */
 544
 545 #define SNDRV_SEQ_REMOVE_INPUT          (1<<0)  /* Flush input queues */
 546 #define SNDRV_SEQ_REMOVE_OUTPUT         (1<<1)  /* Flush output queues */
 547 #define SNDRV_SEQ_REMOVE_DEST           (1<<2)  /* Restrict by destination q:client:port */
 548 #define SNDRV_SEQ_REMOVE_DEST_CHANNEL   (1<<3)  /* Restrict by channel */
 549 #define SNDRV_SEQ_REMOVE_TIME_BEFORE    (1<<4)  /* Restrict to before time */
 550 #define SNDRV_SEQ_REMOVE_TIME_AFTER     (1<<5)  /* Restrict to time or after */
 551 #define SNDRV_SEQ_REMOVE_TIME_TICK      (1<<6)  /* Time is in ticks */
 552 #define SNDRV_SEQ_REMOVE_EVENT_TYPE     (1<<7)  /* Restrict to event type */
 553 #define SNDRV_SEQ_REMOVE_IGNORE_OFF     (1<<8)  /* Do not flush off events */
 554 #define SNDRV_SEQ_REMOVE_TAG_MATCH      (1<<9)  /* Restrict to events with given tag */
 555
 556 struct sndrv_seq_remove_events {
 557         unsigned int  remove_mode;      /* Flags that determine what gets removed */
 558
 559         union sndrv_seq_timestamp time;
 560
 561         unsigned char queue;    /* Queue for REMOVE_DEST */
 562         struct sndrv_seq_addr dest;     /* Address for REMOVE_DEST */
 563         unsigned char channel;  /* Channel for REMOVE_DEST */
 564
 565         int  type;      /* For REMOVE_EVENT_TYPE */
 566         char  tag;      /* Tag for REMOVE_TAG */
 567
 568         int  reserved[10];      /* To allow for future binary compatibility */
 569
 570 };
 571
 572
 573         /* known port numbers */
 574 #define SNDRV_SEQ_PORT_SYSTEM_TIMER     0
 575 #define SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE  1
 576
 577         /* port capabilities (32 bits) */
 578 #define SNDRV_SEQ_PORT_CAP_READ         (1<<0)  /* readable from this port */
 579 #define SNDRV_SEQ_PORT_CAP_WRITE        (1<<1)  /* writable to this port */
 580
 581 #define SNDRV_SEQ_PORT_CAP_SYNC_READ    (1<<2)
 582 #define SNDRV_SEQ_PORT_CAP_SYNC_WRITE   (1<<3)
 583
 584 #define SNDRV_SEQ_PORT_CAP_DUPLEX       (1<<4)
 585
 586 #define SNDRV_SEQ_PORT_CAP_SUBS_READ    (1<<5)  /* allow read subscription */
 587 #define SNDRV_SEQ_PORT_CAP_SUBS_WRITE   (1<<6)  /* allow write subscription */
 588 #define SNDRV_SEQ_PORT_CAP_NO_EXPORT    (1<<7)  /* routing not allowed */
 589
 590         /* port type */
 591 #define SNDRV_SEQ_PORT_TYPE_SPECIFIC    (1<<0)  /* hardware specific */
 592 #define SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC (1<<1) /* generic MIDI device */
 593 #define SNDRV_SEQ_PORT_TYPE_MIDI_GM     (1<<2)  /* General MIDI compatible device */
 594 #define SNDRV_SEQ_PORT_TYPE_MIDI_GS     (1<<3)  /* GS compatible device */
 595 #define SNDRV_SEQ_PORT_TYPE_MIDI_XG     (1<<4)  /* XG compatible device */
 596 #define SNDRV_SEQ_PORT_TYPE_MIDI_MT32   (1<<5)  /* MT-32 compatible device */
 597 #define SNDRV_SEQ_PORT_TYPE_MIDI_GM2    (1<<6)  /* General MIDI 2 compatible device */
 598
 599 /* other standards...*/
 600 #define SNDRV_SEQ_PORT_TYPE_SYNTH       (1<<10) /* Synth device (no MIDI compatible - direct wavetable) */
 601 #define SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE (1<<11)       /* Sampling device (support sample download) */
 602 #define SNDRV_SEQ_PORT_TYPE_SAMPLE      (1<<12) /* Sampling device (sample can be downloaded at any time) */
 603 /*...*/
 604 #define SNDRV_SEQ_PORT_TYPE_APPLICATION (1<<20) /* application (sequencer/editor) */
 605
 606 /* misc. conditioning flags */
 607 #define SNDRV_SEQ_PORT_FLG_GIVEN_PORT   (1<<0)
 608 #define SNDRV_SEQ_PORT_FLG_TIMESTAMP    (1<<1)
 609 #define SNDRV_SEQ_PORT_FLG_TIME_REAL    (1<<2)
 610
 611 struct sndrv_seq_port_info {
 612         struct sndrv_seq_addr addr;     /* client/port numbers */
 613         char name[64];                  /* port name */
 614
 615         unsigned int capability;        /* port capability bits */
 616         unsigned int type;              /* port type bits */
 617         int midi_channels;              /* channels per MIDI port */
 618         int midi_voices;                /* voices per MIDI port */
 619         int synth_voices;               /* voices per SYNTH port */
 620
 621         int read_use;                   /* R/O: subscribers for output (from this port) */
 622         int write_use;                  /* R/O: subscribers for input (to this port) */
 623
 624         void *kernel;                   /* reserved for kernel use (must be NULL) */
 625         unsigned int flags;             /* misc. conditioning */
 626         unsigned char time_queue;       /* queue # for timestamping */
 627         char reserved[59];              /* for future use */
 628 };
 629
 630
 631 /* queue flags */
 632 #define SNDRV_SEQ_QUEUE_FLG_SYNC        (1<<0)  /* sync enabled */
 633
 634 /* queue information */
 635 struct sndrv_seq_queue_info {
 636         int queue;              /* queue id */
 637
 638         /*
 639          *  security settings, only owner of this queue can start/stop timer
 640          *  etc. if the queue is locked for other clients
 641          */
 642         int owner;              /* client id for owner of the queue */
 643         unsigned locked:1;      /* timing queue locked for other queues */
 644         char name[64];          /* name of this queue */
 645         unsigned int flags;     /* flags */
 646         char reserved[60];      /* for future use */
 647
 648 };
 649
 650 /* queue info/status */
 651 struct sndrv_seq_queue_status {
 652         int queue;                      /* queue id */
 653         int events;                     /* read-only - queue size */
 654         sndrv_seq_tick_time_t tick;     /* current tick */
 655         struct sndrv_seq_real_time time; /* current time */
 656         int running;                    /* running state of queue */
 657         int flags;                      /* various flags */
 658         char reserved[64];              /* for the future */
 659 };
 660
 661
 662 /* queue tempo */
 663 struct sndrv_seq_queue_tempo {
 664         int queue;                      /* sequencer queue */
 665         unsigned int tempo;             /* current tempo, us/tick */
 666         int ppq;                        /* time resolution, ticks/quarter */
 667         unsigned int skew_value;        /* queue skew */
 668         unsigned int skew_base;         /* queue skew base */
 669         char reserved[24];              /* for the future */
 670 };
 671
 672
 673 /* sequencer timer sources */
 674 #define SNDRV_SEQ_TIMER_ALSA            0       /* ALSA timer */
 675 #define SNDRV_SEQ_TIMER_MIDI_CLOCK      1       /* Midi Clock (CLOCK event) */
 676 #define SNDRV_SEQ_TIMER_MIDI_TICK       2       /* Midi Timer Tick (TICK event) */
 677
 678 /* queue timer info */
 679 struct sndrv_seq_queue_timer {
 680         int queue;                      /* sequencer queue */
 681         int type;                       /* source timer type */
 682         union {
 683                 struct {
 684                         struct sndrv_timer_id id;       /* ALSA's timer ID */
 685                         unsigned int resolution;        /* resolution in Hz */
 686                 } alsa;
 687         } u;
 688         char reserved[64];              /* for the future use */
 689 };
 690
 691
 692 struct sndrv_seq_queue_client {
 693         int queue;              /* sequencer queue */
 694         int client;             /* sequencer client */
 695         int used;               /* queue is used with this client
 696                                    (must be set for accepting events) */
 697         /* per client watermarks */
 698         char reserved[64];      /* for future use */
 699 };
 700
 701
 702 #define SNDRV_SEQ_PORT_SUBS_EXCLUSIVE   (1<<0)  /* exclusive connection */
 703 #define SNDRV_SEQ_PORT_SUBS_TIMESTAMP   (1<<1)
 704 #define SNDRV_SEQ_PORT_SUBS_TIME_REAL   (1<<2)
 705
 706 struct sndrv_seq_port_subscribe {
 707         struct sndrv_seq_addr sender;   /* sender address */
 708         struct sndrv_seq_addr dest;     /* destination address */
 709         unsigned int voices;            /* number of voices to be allocated (0 = don't care) */
 710         unsigned int flags;             /* modes */
 711         unsigned char queue;            /* input time-stamp queue (optional) */
 712         unsigned char pad[3];           /* reserved */
 713         char reserved[64];
 714 };
 715
 716 /* type of query subscription */
 717 #define SNDRV_SEQ_QUERY_SUBS_READ       0
 718 #define SNDRV_SEQ_QUERY_SUBS_WRITE      1
 719
 720 struct sndrv_seq_query_subs {
 721         struct sndrv_seq_addr root;     /* client/port id to be searched */
 722         int type;               /* READ or WRITE */
 723         int index;              /* 0..N-1 */
 724         int num_subs;           /* R/O: number of subscriptions on this port */
 725         struct sndrv_seq_addr addr;     /* R/O: result */
 726         unsigned char queue;    /* R/O: result */
 727         unsigned int flags;     /* R/O: result */
 728         char reserved[64];      /* for future use */
 729 };
 730
 731
 732 /*
 733  *  Instrument abstraction layer
 734  *     - based on events
 735  */
 736
 737 /* instrument types */
 738 #define SNDRV_SEQ_INSTR_ATYPE_DATA      0       /* instrument data */
 739 #define SNDRV_SEQ_INSTR_ATYPE_ALIAS     1       /* instrument alias */
 740
 741 /* instrument ASCII identifiers */
 742 #define SNDRV_SEQ_INSTR_ID_DLS1         "DLS1"
 743 #define SNDRV_SEQ_INSTR_ID_DLS2         "DLS2"
 744 #define SNDRV_SEQ_INSTR_ID_SIMPLE       "Simple Wave"
 745 #define SNDRV_SEQ_INSTR_ID_SOUNDFONT    "SoundFont"
 746 #define SNDRV_SEQ_INSTR_ID_GUS_PATCH    "GUS Patch"
 747 #define SNDRV_SEQ_INSTR_ID_INTERWAVE    "InterWave FFFF"
 748 #define SNDRV_SEQ_INSTR_ID_OPL2_3       "OPL2/3 FM"
 749 #define SNDRV_SEQ_INSTR_ID_OPL4         "OPL4"
 750
 751 /* instrument types */
 752 #define SNDRV_SEQ_INSTR_TYPE0_DLS1      (1<<0)  /* MIDI DLS v1 */
 753 #define SNDRV_SEQ_INSTR_TYPE0_DLS2      (1<<1)  /* MIDI DLS v2 */
 754 #define SNDRV_SEQ_INSTR_TYPE1_SIMPLE    (1<<0)  /* Simple Wave */
 755 #define SNDRV_SEQ_INSTR_TYPE1_SOUNDFONT (1<<1)  /* EMU SoundFont */
 756 #define SNDRV_SEQ_INSTR_TYPE1_GUS_PATCH (1<<2)  /* Gravis UltraSound Patch */
 757 #define SNDRV_SEQ_INSTR_TYPE1_INTERWAVE (1<<3)  /* InterWave FFFF */
 758 #define SNDRV_SEQ_INSTR_TYPE2_OPL2_3    (1<<0)  /* Yamaha OPL2/3 FM */
 759 #define SNDRV_SEQ_INSTR_TYPE2_OPL4      (1<<1)  /* Yamaha OPL4 */
 760
 761 /* put commands */
 762 #define SNDRV_SEQ_INSTR_PUT_CMD_CREATE  0
 763 #define SNDRV_SEQ_INSTR_PUT_CMD_REPLACE 1
 764 #define SNDRV_SEQ_INSTR_PUT_CMD_MODIFY  2
 765 #define SNDRV_SEQ_INSTR_PUT_CMD_ADD     3
 766 #define SNDRV_SEQ_INSTR_PUT_CMD_REMOVE  4
 767
 768 /* get commands */
 769 #define SNDRV_SEQ_INSTR_GET_CMD_FULL    0
 770 #define SNDRV_SEQ_INSTR_GET_CMD_PARTIAL 1
 771
 772 /* query flags */
 773 #define SNDRV_SEQ_INSTR_QUERY_FOLLOW_ALIAS (1<<0)
 774
 775 /* free commands */
 776 #define SNDRV_SEQ_INSTR_FREE_CMD_ALL            0
 777 #define SNDRV_SEQ_INSTR_FREE_CMD_PRIVATE        1
 778 #define SNDRV_SEQ_INSTR_FREE_CMD_CLUSTER        2
 779 #define SNDRV_SEQ_INSTR_FREE_CMD_SINGLE         3
 780
 781 /* size of ROM/RAM */
 782 typedef unsigned int sndrv_seq_instr_size_t;
 783
 784 /* INSTR_INFO */
 785
 786 struct sndrv_seq_instr_info {
 787         int result;                     /* operation result */
 788         unsigned int formats[8];        /* bitmap of supported formats */
 789         int ram_count;                  /* count of RAM banks */
 790         sndrv_seq_instr_size_t ram_sizes[16]; /* size of RAM banks */
 791         int rom_count;                  /* count of ROM banks */
 792         sndrv_seq_instr_size_t rom_sizes[8]; /* size of ROM banks */
 793         char reserved[128];
 794 };
 795
 796 /* INSTR_STATUS */
 797
 798 struct sndrv_seq_instr_status {
 799         int result;                     /* operation result */
 800         sndrv_seq_instr_size_t free_ram[16]; /* free RAM in banks */
 801         int instrument_count;           /* count of downloaded instruments */
 802         char reserved[128];
 803 };
 804
 805 /* INSTR_FORMAT_INFO */
 806
 807 struct sndrv_seq_instr_format_info {
 808         char format[16];                /* format identifier - SNDRV_SEQ_INSTR_ID_* */
 809         unsigned int len;               /* max data length (without this structure) */
 810 };
 811
 812 struct sndrv_seq_instr_format_info_result {
 813         int result;                     /* operation result */
 814         char format[16];                /* format identifier */
 815         unsigned int len;               /* filled data length (without this structure) */
 816 };
 817
 818 /* instrument data */
 819 struct sndrv_seq_instr_data {
 820         char name[32];                  /* instrument name */
 821         char reserved[16];              /* for the future use */
 822         int type;                       /* instrument type */
 823         union {
 824                 char format[16];        /* format identifier */
 825                 struct sndrv_seq_instr alias;
 826         } data;
 827 };
 828
 829 /* INSTR_PUT/GET, data are stored in one block (extended), header + data */
 830
 831 struct sndrv_seq_instr_header {
 832         union {
 833                 struct sndrv_seq_instr instr;
 834                 sndrv_seq_instr_cluster_t cluster;
 835         } id;                           /* instrument identifier */
 836         unsigned int cmd;               /* get/put/free command */
 837         unsigned int flags;             /* query flags (only for get) */
 838         unsigned int len;               /* real instrument data length (without header) */
 839         int result;                     /* operation result */
 840         char reserved[16];              /* for the future */
 841         struct sndrv_seq_instr_data data; /* instrument data (for put/get result) */
 842 };
 843
 844 /* INSTR_CLUSTER_SET */
 845
 846 struct sndrv_seq_instr_cluster_set {
 847         sndrv_seq_instr_cluster_t cluster; /* cluster identifier */
 848         char name[32];                  /* cluster name */
 849         int priority;                   /* cluster priority */
 850         char reserved[64];              /* for the future use */
 851 };
 852
 853 /* INSTR_CLUSTER_GET */
 854
 855 struct sndrv_seq_instr_cluster_get {
 856         sndrv_seq_instr_cluster_t cluster; /* cluster identifier */
 857         char name[32];                  /* cluster name */
 858         int priority;                   /* cluster priority */
 859         char reserved[64];              /* for the future use */
 860 };
 861
 862 /*
 863  *  IOCTL commands
 864  */
 865
 866 #define SNDRV_SEQ_IOCTL_PVERSION        _IOR ('S', 0x00, int)
 867 #define SNDRV_SEQ_IOCTL_CLIENT_ID       _IOR ('S', 0x01, int)
 868 #define SNDRV_SEQ_IOCTL_SYSTEM_INFO     _IOWR('S', 0x02, struct sndrv_seq_system_info)
 869 #define SNDRV_SEQ_IOCTL_RUNNING_MODE    _IOWR('S', 0x03, struct sndrv_seq_running_info)
 870
 871 #define SNDRV_SEQ_IOCTL_GET_CLIENT_INFO _IOWR('S', 0x10, struct sndrv_seq_client_info)
 872 #define SNDRV_SEQ_IOCTL_SET_CLIENT_INFO _IOW ('S', 0x11, struct sndrv_seq_client_info)
 873
 874 #define SNDRV_SEQ_IOCTL_CREATE_PORT     _IOWR('S', 0x20, struct sndrv_seq_port_info)
 875 #define SNDRV_SEQ_IOCTL_DELETE_PORT     _IOW ('S', 0x21, struct sndrv_seq_port_info)
 876 #define SNDRV_SEQ_IOCTL_GET_PORT_INFO   _IOWR('S', 0x22, struct sndrv_seq_port_info)
 877 #define SNDRV_SEQ_IOCTL_SET_PORT_INFO   _IOW ('S', 0x23, struct sndrv_seq_port_info)
 878
 879 #define SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT  _IOW ('S', 0x30, struct sndrv_seq_port_subscribe)
 880 #define SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT _IOW ('S', 0x31, struct sndrv_seq_port_subscribe)
 881
 882 #define SNDRV_SEQ_IOCTL_CREATE_QUEUE    _IOWR('S', 0x32, struct sndrv_seq_queue_info)
 883 #define SNDRV_SEQ_IOCTL_DELETE_QUEUE    _IOW ('S', 0x33, struct sndrv_seq_queue_info)
 884 #define SNDRV_SEQ_IOCTL_GET_QUEUE_INFO  _IOWR('S', 0x34, struct sndrv_seq_queue_info)
 885 #define SNDRV_SEQ_IOCTL_SET_QUEUE_INFO  _IOWR('S', 0x35, struct sndrv_seq_queue_info)
 886 #define SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE _IOWR('S', 0x36, struct sndrv_seq_queue_info)
 887 #define SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS _IOWR('S', 0x40, struct sndrv_seq_queue_status)
 888 #define SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO _IOWR('S', 0x41, struct sndrv_seq_queue_tempo)
 889 #define SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO _IOW ('S', 0x42, struct sndrv_seq_queue_tempo)
 890 #define SNDRV_SEQ_IOCTL_GET_QUEUE_OWNER _IOWR('S', 0x43, struct sndrv_seq_queue_owner)
 891 #define SNDRV_SEQ_IOCTL_SET_QUEUE_OWNER _IOW ('S', 0x44, struct sndrv_seq_queue_owner)
 892 #define SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER _IOWR('S', 0x45, struct sndrv_seq_queue_timer)
 893 #define SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER _IOW ('S', 0x46, struct sndrv_seq_queue_timer)
 894 /* XXX
 895 #define SNDRV_SEQ_IOCTL_GET_QUEUE_SYNC  _IOWR('S', 0x53, struct sndrv_seq_queue_sync)
 896 #define SNDRV_SEQ_IOCTL_SET_QUEUE_SYNC  _IOW ('S', 0x54, struct sndrv_seq_queue_sync)
 897 */
 898 #define SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT        _IOWR('S', 0x49, struct sndrv_seq_queue_client)
 899 #define SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT        _IOW ('S', 0x4a, struct sndrv_seq_queue_client)
 900 #define SNDRV_SEQ_IOCTL_GET_CLIENT_POOL _IOWR('S', 0x4b, struct sndrv_seq_client_pool)
 901 #define SNDRV_SEQ_IOCTL_SET_CLIENT_POOL _IOW ('S', 0x4c, struct sndrv_seq_client_pool)
 902 #define SNDRV_SEQ_IOCTL_REMOVE_EVENTS   _IOW ('S', 0x4e, struct sndrv_seq_remove_events)
 903 #define SNDRV_SEQ_IOCTL_QUERY_SUBS      _IOWR('S', 0x4f, struct sndrv_seq_query_subs)
 904 #define SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION        _IOWR('S', 0x50, struct sndrv_seq_port_subscribe)
 905 #define SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT       _IOWR('S', 0x51, struct sndrv_seq_client_info)
 906 #define SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT _IOWR('S', 0x52, struct sndrv_seq_port_info)
 907
 908 #endif /* __SOUND_ASEQUENCER_H */