asequencer.h

Axis 221 camera embedded programing interface

/*
 *  Main header file for the ALSA sequencer
 *  Copyright (c) 1998-1999 by Frank van de Pol <[e-mail]>
 *            (c) 1998-1999 by Jaroslav Kysela <[e-mail]>
 *
 *
 *   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
 *
 */
#ifndef __SOUND_ASEQUENCER_H
#define __SOUND_ASEQUENCER_H


/** version of the sequencer */
#define SNDRV_SEQ_VERSION SNDRV_PROTOCOL_VERSION (1, 0, 1)

/**
 * definition of sequencer event types
 */

/** system messages
 * event data type = #snd_seq_result
 */
#define SNDRV_SEQ_EVENT_SYSTEM		0
#define SNDRV_SEQ_EVENT_RESULT		1

/** note messages (channel specific)
 * event data type = #snd_seq_ev_note
 */
#define SNDRV_SEQ_EVENT_NOTE		5
#define SNDRV_SEQ_EVENT_NOTEON		6
#define SNDRV_SEQ_EVENT_NOTEOFF		7
#define SNDRV_SEQ_EVENT_KEYPRESS	8
	
/** control messages (channel specific)
 * event data type = #snd_seq_ev_ctrl
 */
#define SNDRV_SEQ_EVENT_CONTROLLER	10
#define SNDRV_SEQ_EVENT_PGMCHANGE	11
#define SNDRV_SEQ_EVENT_CHANPRESS	12
#define SNDRV_SEQ_EVENT_PITCHBEND	13	/**< from -8192 to 8191 */
#define SNDRV_SEQ_EVENT_CONTROL14	14	/**< 14 bit controller value */
#define SNDRV_SEQ_EVENT_NONREGPARAM	15	/**< 14 bit NRPN address + 14 bit unsigned value */
#define SNDRV_SEQ_EVENT_REGPARAM	16	/**< 14 bit RPN address + 14 bit unsigned value */

/** synchronisation messages
 * event data type = #snd_seq_ev_ctrl
 */
#define SNDRV_SEQ_EVENT_SONGPOS		20	/* Song Position Pointer with LSB and MSB values */
#define SNDRV_SEQ_EVENT_SONGSEL		21	/* Song Select with song ID number */
#define SNDRV_SEQ_EVENT_QFRAME		22	/* midi time code quarter frame */
#define SNDRV_SEQ_EVENT_TIMESIGN	23	/* SMF Time Signature event */
#define SNDRV_SEQ_EVENT_KEYSIGN		24	/* SMF Key Signature event */
	        
/** timer messages
 * event data type = snd_seq_ev_queue_control
 */
#define SNDRV_SEQ_EVENT_START		30	/* midi Real Time Start message */
#define SNDRV_SEQ_EVENT_CONTINUE	31	/* midi Real Time Continue message */
#define SNDRV_SEQ_EVENT_STOP		32	/* midi Real Time Stop message */	
#define	SNDRV_SEQ_EVENT_SETPOS_TICK	33	/* set tick queue position */
#define SNDRV_SEQ_EVENT_SETPOS_TIME	34	/* set realtime queue position */
#define SNDRV_SEQ_EVENT_TEMPO		35	/* (SMF) Tempo event */
#define SNDRV_SEQ_EVENT_CLOCK		36	/* midi Real Time Clock message */
#define SNDRV_SEQ_EVENT_TICK		37	/* midi Real Time Tick message */
#define SNDRV_SEQ_EVENT_QUEUE_SKEW	38	/* skew queue tempo */

/** others
 * event data type = none
 */
#define SNDRV_SEQ_EVENT_TUNE_REQUEST	40	/* tune request */
#define SNDRV_SEQ_EVENT_RESET		41	/* reset to power-on state */
#define SNDRV_SEQ_EVENT_SENSING		42	/* "active sensing" event */

/** echo back, kernel private messages
 * event data type = any type
 */
#define SNDRV_SEQ_EVENT_ECHO		50	/* echo event */
#define SNDRV_SEQ_EVENT_OSS		51	/* OSS raw event */

/** system status messages (broadcast for subscribers)
 * event data type = snd_seq_addr
 */
#define SNDRV_SEQ_EVENT_CLIENT_START	60	/* new client has connected */
#define SNDRV_SEQ_EVENT_CLIENT_EXIT	61	/* client has left the system */
#define SNDRV_SEQ_EVENT_CLIENT_CHANGE	62	/* client status/info has changed */
#define SNDRV_SEQ_EVENT_PORT_START	63	/* new port was created */
#define SNDRV_SEQ_EVENT_PORT_EXIT	64	/* port was deleted from system */
#define SNDRV_SEQ_EVENT_PORT_CHANGE	65	/* port status/info has changed */

/** port connection changes
 * event data type = snd_seq_connect
 */
#define SNDRV_SEQ_EVENT_PORT_SUBSCRIBED	66	/* ports connected */
#define SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED 67	/* ports disconnected */

/** synthesizer events
 * event data type = snd_seq_eve_sample_control
 */
#define SNDRV_SEQ_EVENT_SAMPLE		70	/* sample select */
#define SNDRV_SEQ_EVENT_SAMPLE_CLUSTER	71	/* sample cluster select */
#define SNDRV_SEQ_EVENT_SAMPLE_START	72	/* voice start */
#define SNDRV_SEQ_EVENT_SAMPLE_STOP	73	/* voice stop */
#define SNDRV_SEQ_EVENT_SAMPLE_FREQ	74	/* playback frequency */
#define SNDRV_SEQ_EVENT_SAMPLE_VOLUME	75	/* volume and balance */
#define SNDRV_SEQ_EVENT_SAMPLE_LOOP	76	/* sample loop */
#define SNDRV_SEQ_EVENT_SAMPLE_POSITION	77	/* sample position */
#define SNDRV_SEQ_EVENT_SAMPLE_PRIVATE1	78	/* private (hardware dependent) event */

/** user-defined events with fixed length
 * event data type = any
 */
#define SNDRV_SEQ_EVENT_USR0		90
#define SNDRV_SEQ_EVENT_USR1		91
#define SNDRV_SEQ_EVENT_USR2		92
#define SNDRV_SEQ_EVENT_USR3		93
#define SNDRV_SEQ_EVENT_USR4		94
#define SNDRV_SEQ_EVENT_USR5		95
#define SNDRV_SEQ_EVENT_USR6		96
#define SNDRV_SEQ_EVENT_USR7		97
#define SNDRV_SEQ_EVENT_USR8		98
#define SNDRV_SEQ_EVENT_USR9		99

/** instrument layer
 * variable length data can be passed directly to the driver
 */
#define SNDRV_SEQ_EVENT_INSTR_BEGIN	100	/* begin of instrument management */
#define SNDRV_SEQ_EVENT_INSTR_END	101	/* end of instrument management */
#define SNDRV_SEQ_EVENT_INSTR_INFO	102	/* instrument interface info */
#define SNDRV_SEQ_EVENT_INSTR_INFO_RESULT 103	/* result */
#define SNDRV_SEQ_EVENT_INSTR_FINFO	104	/* get format info */
#define SNDRV_SEQ_EVENT_INSTR_FINFO_RESULT 105	/* get format info */
#define SNDRV_SEQ_EVENT_INSTR_RESET	106	/* reset instrument memory */
#define SNDRV_SEQ_EVENT_INSTR_STATUS	107	/* instrument interface status */
#define SNDRV_SEQ_EVENT_INSTR_STATUS_RESULT 108	/* result */
#define SNDRV_SEQ_EVENT_INSTR_PUT	109	/* put instrument to port */
#define SNDRV_SEQ_EVENT_INSTR_GET	110	/* get instrument from port */
#define SNDRV_SEQ_EVENT_INSTR_GET_RESULT 111	/* result */
#define SNDRV_SEQ_EVENT_INSTR_FREE	112	/* free instrument(s) */
#define SNDRV_SEQ_EVENT_INSTR_LIST	113	/* instrument list */
#define SNDRV_SEQ_EVENT_INSTR_LIST_RESULT 114	/* result */
#define SNDRV_SEQ_EVENT_INSTR_CLUSTER	115	/* cluster parameters */
#define SNDRV_SEQ_EVENT_INSTR_CLUSTER_GET 116	/* get cluster parameters */
#define SNDRV_SEQ_EVENT_INSTR_CLUSTER_RESULT 117 /* result */
#define SNDRV_SEQ_EVENT_INSTR_CHANGE	118	/* instrument change */
/* 119-129: reserved */

/* 130-139: variable length events
 * event data type = snd_seq_ev_ext
 * (SNDRV_SEQ_EVENT_LENGTH_VARIABLE must be set)
 */
#define SNDRV_SEQ_EVENT_SYSEX		130	/* system exclusive data (variable length) */
#define SNDRV_SEQ_EVENT_BOUNCE		131	/* error event */
/* 132-134: reserved */
#define SNDRV_SEQ_EVENT_USR_VAR0	135
#define SNDRV_SEQ_EVENT_USR_VAR1	136
#define SNDRV_SEQ_EVENT_USR_VAR2	137
#define SNDRV_SEQ_EVENT_USR_VAR3	138
#define SNDRV_SEQ_EVENT_USR_VAR4	139

/* 150-151: kernel events with quote - DO NOT use in user clients */
#define SNDRV_SEQ_EVENT_KERNEL_ERROR	150
#define SNDRV_SEQ_EVENT_KERNEL_QUOTE	151	/* obsolete */

/* 152-191: reserved */

/* 192-254: hardware specific events */

/* 255: special event */
#define SNDRV_SEQ_EVENT_NONE		255


typedef unsigned char snd_seq_event_type_t;

/** event address */
struct snd_seq_addr {
	unsigned char client;	/**< Client number:         0..255, 255 = broadcast to all clients */
	unsigned char port;	/**< Port within client:    0..255, 255 = broadcast to all ports */
};

/** port connection */
struct snd_seq_connect {
	struct snd_seq_addr sender;
	struct snd_seq_addr dest;
};


#define SNDRV_SEQ_ADDRESS_UNKNOWN	253	/* unknown source */
#define SNDRV_SEQ_ADDRESS_SUBSCRIBERS	254	/* send event to all subscribed ports */
#define SNDRV_SEQ_ADDRESS_BROADCAST	255	/* send event to all queues/clients/ports/channels */
#define SNDRV_SEQ_QUEUE_DIRECT		253	/* direct dispatch */

	/* event mode flag - NOTE: only 8 bits available! */
#define SNDRV_SEQ_TIME_STAMP_TICK	(0<<0) /* timestamp in clock ticks */
#define SNDRV_SEQ_TIME_STAMP_REAL	(1<<0) /* timestamp in real time */
#define SNDRV_SEQ_TIME_STAMP_MASK	(1<<0)

#define SNDRV_SEQ_TIME_MODE_ABS		(0<<1)	/* absolute timestamp */
#define SNDRV_SEQ_TIME_MODE_REL		(1<<1)	/* relative to current time */
#define SNDRV_SEQ_TIME_MODE_MASK	(1<<1)

#define SNDRV_SEQ_EVENT_LENGTH_FIXED	(0<<2)	/* fixed event size */
#define SNDRV_SEQ_EVENT_LENGTH_VARIABLE	(1<<2)	/* variable event size */
#define SNDRV_SEQ_EVENT_LENGTH_VARUSR	(2<<2)	/* variable event size - user memory space */
#define SNDRV_SEQ_EVENT_LENGTH_MASK	(3<<2)

#define SNDRV_SEQ_PRIORITY_NORMAL	(0<<4)	/* normal priority */
#define SNDRV_SEQ_PRIORITY_HIGH		(1<<4)	/* event should be processed before others */
#define SNDRV_SEQ_PRIORITY_MASK		(1<<4)


	/* note event */
struct snd_seq_ev_note {
	unsigned char channel;
	unsigned char note;
	unsigned char velocity;
	unsigned char off_velocity;	/* only for SNDRV_SEQ_EVENT_NOTE */
	unsigned int duration;		/* only for SNDRV_SEQ_EVENT_NOTE */
};

	/* controller event */
struct snd_seq_ev_ctrl {
	unsigned char channel;
	unsigned char unused1, unused2, unused3;	/* pad */
	unsigned int param;
	signed int value;
};

	/* generic set of bytes (12x8 bit) */
struct snd_seq_ev_raw8 {
	unsigned char d[12];	/* 8 bit value */
};

	/* generic set of integers (3x32 bit) */
struct snd_seq_ev_raw32 {
	unsigned int d[3];	/* 32 bit value */
};

	/* external stored data */
struct snd_seq_ev_ext {
	unsigned int len;	/* length of data */
	void *ptr;		/* pointer to data (note: maybe 64-bit) */
} __attribute__((packed));

/* Instrument cluster type */
typedef unsigned int snd_seq_instr_cluster_t;

/* Instrument type */
struct snd_seq_instr {
	snd_seq_instr_cluster_t cluster;
	unsigned int std;		/* the upper byte means a private instrument (owner - client #) */
	unsigned short bank;
	unsigned short prg;
};

	/* sample number */
struct snd_seq_ev_sample {
	unsigned int std;
	unsigned short bank;
	unsigned short prg;
};

	/* sample cluster */
struct snd_seq_ev_cluster {
	snd_seq_instr_cluster_t cluster;
};

	/* sample position */
typedef unsigned int snd_seq_position_t; /* playback position (in samples) * 16 */

	/* sample stop mode */
enum {
	SAMPLE_STOP_IMMEDIATELY = 0,	/* terminate playing immediately */
	SAMPLE_STOP_VENVELOPE = 1,	/* finish volume envelope */
	SAMPLE_STOP_LOOP = 2		/* terminate loop and finish wave */
};

	/* sample frequency */
typedef int snd_seq_frequency_t; /* playback frequency in HZ * 16 */

	/* sample volume control; if any value is set to -1 == do not change */
struct snd_seq_ev_volume {
	signed short volume;	/* range: 0-16383 */
	signed short lr;	/* left-right balance; range: 0-16383 */
	signed short fr;	/* front-rear balance; range: 0-16383 */
	signed short du;	/* down-up balance; range: 0-16383 */
};

	/* simple loop redefinition */
struct snd_seq_ev_loop {
	unsigned int start;	/* loop start (in samples) * 16 */
	unsigned int end;	/* loop end (in samples) * 16 */
};

struct snd_seq_ev_sample_control {
	unsigned char channel;
	unsigned char unused1, unused2, unused3;	/* pad */
	union {
		struct snd_seq_ev_sample sample;
		struct snd_seq_ev_cluster cluster;
		snd_seq_position_t position;
		int stop_mode;
		snd_seq_frequency_t frequency;
		struct snd_seq_ev_volume volume;
		struct snd_seq_ev_loop loop;
		unsigned char raw8[8];
	} param;
};



/* INSTR_BEGIN event */
struct snd_seq_ev_instr_begin {
	int timeout;		/* zero = forever, otherwise timeout in ms */
};

struct snd_seq_result {
	int event;		/* processed event type */
	int result;
};


struct snd_seq_real_time {
	unsigned int tv_sec;	/* seconds */
	unsigned int tv_nsec;	/* nanoseconds */
};

typedef unsigned int snd_seq_tick_time_t;	/* midi ticks */

union snd_seq_timestamp {
	snd_seq_tick_time_t tick;
	struct snd_seq_real_time time;
};

struct snd_seq_queue_skew {
	unsigned int value;
	unsigned int base;
};

	/* queue timer control */
struct snd_seq_ev_queue_control {
	unsigned char queue;			/* affected queue */
	unsigned char pad[3];			/* reserved */
	union {
		signed int value;		/* affected value (e.g. tempo) */
		union snd_seq_timestamp time;	/* time */
		unsigned int position;		/* sync position */
		struct snd_seq_queue_skew skew;
		unsigned int d32[2];
		unsigned char d8[8];
	} param;
};

	/* quoted event - inside the kernel only */
struct snd_seq_ev_quote {
	struct snd_seq_addr origin;		/* original sender */
	unsigned short value;		/* optional data */
	struct snd_seq_event *event;		/* quoted event */
} __attribute__((packed));


	/* sequencer event */
struct snd_seq_event {
	snd_seq_event_type_t type;	/* event type */
	unsigned char flags;		/* event flags */
	char tag;
	
	unsigned char queue;		/* schedule queue */
	union snd_seq_timestamp time;	/* schedule time */


	struct snd_seq_addr source;	/* source address */
	struct snd_seq_addr dest;	/* destination address */

	union {				/* event data... */
		struct snd_seq_ev_note note;
		struct snd_seq_ev_ctrl control;
		struct snd_seq_ev_raw8 raw8;
		struct snd_seq_ev_raw32 raw32;
		struct snd_seq_ev_ext ext;
		struct snd_seq_ev_queue_control queue;
		union snd_seq_timestamp time;
		struct snd_seq_addr addr;
		struct snd_seq_connect connect;
		struct snd_seq_result result;
		struct snd_seq_ev_instr_begin instr_begin;
		struct snd_seq_ev_sample_control sample;
		struct snd_seq_ev_quote quote;
	} data;
};


/*
 * bounce event - stored as variable size data
 */
struct snd_seq_event_bounce {
	int err;
	struct snd_seq_event event;
	/* external data follows here. */
};


	/* system information */
struct snd_seq_system_info {
	int queues;			/* maximum queues count */
	int clients;			/* maximum clients count */
	int ports;			/* maximum ports per client */
	int channels;			/* maximum channels per port */
	int cur_clients;		/* current clients */
	int cur_queues;			/* current queues */
	char reserved[24];
};