alsa-lib/include/seqmid.h

/**
 * \file include/seqmid.h
 * \brief Application interface library for the ALSA driver
 * \author Jaroslav Kysela <perex@perex.cz>
 * \author Abramo Bagnara <abramo@alsa-project.org>
 * \author Takashi Iwai <tiwai@suse.de>
 * \date 1998-2001
 *
 * Application interface library for the ALSA driver
 */
/*
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as
 *   published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#if !defined(__ASOUNDLIB_H) && !defined(ALSA_LIBRARY_BUILD)
/* don't use ALSA_LIBRARY_BUILD define in sources outside alsa-lib */
#warning "use #include <alsa/asoundlib.h>, <alsa/seqmid.h> should not be used directly"
#include <alsa/asoundlib.h>
#endif

#ifndef __ALSA_SEQMID_H
#define __ALSA_SEQMID_H

#ifdef __cplusplus
extern "C" {
#endif

/**
 *  \defgroup SeqMiddle Sequencer Middle Level Interface
 *  Sequencer Middle Level Interface
 *  \ingroup Sequencer
 *  \{
 */

/**
 * \brief initialize event record
 * \param ev event record pointer
 * 
 * This macro clears the given event record pointer to the default status.
 */
static inline void snd_seq_ev_clear(snd_seq_event_t *ev)
{
	memset(ev, 0, sizeof(*ev));
}

/**
 * \brief initialize event record for UMP
 * \param ev event record pointer
 *
 * This macro clears the given UMP event record pointer to the default status.
 */
static inline void snd_seq_ump_ev_clear(snd_seq_ump_event_t *ev)
{
	memset(ev, 0, sizeof(*ev));
}

/**
 * \brief set the tag for given event
 * \param ev event record
 * \param t event tag
 *
 * This macro sets the tag to the given event record.
 */
#define snd_seq_ev_set_tag(ev,t) \
	((ev)->tag = (t))

/**
 * \brief set the explicit destination
 * \param ev event record
 * \param c destination client id
 * \param p destination port id
 *
 * This macro sets the client and port id numbers to the given event record.
 *
 * \sa snd_seq_ev_set_subs()
 */
#define snd_seq_ev_set_dest(ev,c,p) \
	((ev)->dest.client = (c), (ev)->dest.port = (p))

/**
 * \brief set broadcasting to subscribers
 * \param ev event record
 *
 * This macro sets the destination as the subscribers.
 *
 * \sa snd_seq_ev_set_dest()
 */
#define snd_seq_ev_set_subs(ev) \
	((ev)->dest.client = SND_SEQ_ADDRESS_SUBSCRIBERS,\
	 (ev)->dest.port = SND_SEQ_ADDRESS_UNKNOWN)

/**
 * \brief set broadcasting to all clients/ports
 * \param ev event record
 *
 * This macro sets the destination as the broadcasting.
 *
 * \sa snd_seq_ev_set_dest()
 */
#define snd_seq_ev_set_broadcast(ev) \
	((ev)->dest.client = SND_SEQ_ADDRESS_BROADCAST,\
	 (ev)->dest.port = SND_SEQ_ADDRESS_BROADCAST)

/**
 * \brief set the source port
 * \param ev event record
 * \param p source port id
 *
 * This macro sets the source port id number.
 */
#define snd_seq_ev_set_source(ev,p) \
	((ev)->source.port = (p))

/**
 * \brief set direct passing mode (without queued)
 * \param ev event instance
 *
 * This macro sets the event to the direct passing mode
 * to be delivered immediately without queueing.
 * 
 * \sa snd_seq_ev_schedule_tick(), snd_seq_ev_schedule_real()
 */
#define snd_seq_ev_set_direct(ev) \
	((ev)->queue = SND_SEQ_QUEUE_DIRECT)

/**
 * \brief set tick-scheduling mode on queue
 * \param ev event instance
 * \param q queue id to schedule
 * \param relative relative time-stamp if non-zero
 * \param ttick tick time-stamp to be delivered
 *
 * This macro sets the scheduling of the event in the
 * MIDI tick mode.
 *
 * \sa snd_seq_ev_schedule_real(), snd_seq_ev_set_direct()
 */
#define snd_seq_ev_schedule_tick(ev, q, relative, ttick) \
	((ev)->flags &= ~(SND_SEQ_TIME_STAMP_MASK | SND_SEQ_TIME_MODE_MASK),\
	 (ev)->flags |= SND_SEQ_TIME_STAMP_TICK,\
	 (ev)->flags |= (relative) ? SND_SEQ_TIME_MODE_REL : SND_SEQ_TIME_MODE_ABS,\
	 (ev)->time.tick = (ttick),\
	 (ev)->queue = (q))

/**
 * \brief set real-time-scheduling mode on queue
 * \param ev event instance
 * \param q queue id to schedule
 * \param relative relative time-stamp if non-zero
 * \param rtime time-stamp to be delivered
 *
 * This macro sets the scheduling of the event in the
 * realtime mode.
 *
 * \sa snd_seq_ev_schedule_tick(), snd_seq_ev_set_direct()
 */
#define snd_seq_ev_schedule_real(ev, q, relative, rtime) \
	((ev)->flags &= ~(SND_SEQ_TIME_STAMP_MASK | SND_SEQ_TIME_MODE_MASK),\
	 (ev)->flags |= SND_SEQ_TIME_STAMP_REAL,\
	 (ev)->flags |= (relative) ? SND_SEQ_TIME_MODE_REL : SND_SEQ_TIME_MODE_ABS,\
	 (ev)->time.time = *(rtime),\
	 (ev)->queue = (q))

/**
 * \brief set event priority
 * \param ev event instance
 * \param high_prior 1 for high priority mode
 */
#define snd_seq_ev_set_priority(ev, high_prior) \
	((ev)->flags &= ~SND_SEQ_PRIORITY_MASK,\
	 (ev)->flags |= (high_prior) ? SND_SEQ_PRIORITY_HIGH : SND_SEQ_PRIORITY_NORMAL)

/**
 * \brief set fixed data
 * \param ev event instance
 *
 * Sets the event length mode as fixed size.
 *
 * \sa snd_seq_ev_set_variable(), snd_seq_ev_set_varusr()
 */
#define snd_seq_ev_set_fixed(ev) \
	((ev)->flags &= ~SND_SEQ_EVENT_LENGTH_MASK,\
	 (ev)->flags |= SND_SEQ_EVENT_LENGTH_FIXED)

/**
 * \brief set variable data
 * \param ev event instance
 * \param datalen length of the external data
 * \param dataptr pointer of the external data
 *
 * Sets the event length mode as variable length and stores the data.
 *
 * \sa snd_seq_ev_set_fixed(), snd_seq_ev_set_varusr()
 */
#define snd_seq_ev_set_variable(ev, datalen, dataptr) \
	((ev)->flags &= ~SND_SEQ_EVENT_LENGTH_MASK,\
	 (ev)->flags |= SND_SEQ_EVENT_LENGTH_VARIABLE,\
	 (ev)->data.ext.len = (datalen),\
	 (ev)->data.ext.ptr = (dataptr))

/**
 * \brief set varusr data
 * \param ev event instance
 * \param datalen length of the external data
 * \param dataptr pointer of the external data
 *
 * Sets the event length mode as variable user-space data and stores the data.
 *
 * \sa snd_seq_ev_set_fixed(), snd_seq_ev_set_variable()
 */
#define snd_seq_ev_set_varusr(ev, datalen, dataptr) \
	((ev)->flags &= ~SND_SEQ_EVENT_LENGTH_MASK,\
	 (ev)->flags |= SND_SEQ_EVENT_LENGTH_VARUSR,\
	 (ev)->data.ext.len = (datalen),\
	 (ev)->data.ext.ptr = (dataptr))

/**
 * \brief set queue controls
 * \param ev event record
 * \param typ event type
 * \param q queue id
 * \param val control value
 */
#define snd_seq_ev_set_queue_control(ev, typ, q, val) \
	((ev)->type = (typ),\
	 snd_seq_ev_set_dest(ev, SND_SEQ_CLIENT_SYSTEM, SND_SEQ_PORT_SYSTEM_TIMER),\
	 (ev)->data.queue.queue = (q),\
	 (ev)->data.queue.param.value = (val))

/**
 * \brief set the start queue event
 * \param ev event record
 * \param q queue id to start
 *
 * \sa snd_seq_ev_set_queue_stop(), snd_seq_ev_set_queue_continue()
 */
#define snd_seq_ev_set_queue_start(ev, q) \
	snd_seq_ev_set_queue_control(ev, SND_SEQ_EVENT_START, q, 0)

/**
 * \brief set the stop queue event
 * \param ev event record
 * \param q queue id to stop
 *
 * \sa snd_seq_ev_set_queue_start(), snd_seq_ev_set_queue_continue()
 */
#define snd_seq_ev_set_queue_stop(ev, q) \
	snd_seq_ev_set_queue_control(ev, SND_SEQ_EVENT_STOP, q, 0)

/**
 * \brief set the stop queue event
 * \param ev event record
 * \param q queue id to continue
 *
 * \sa snd_seq_ev_set_queue_start(), snd_seq_ev_set_queue_stop()
 */
#define snd_seq_ev_set_queue_continue(ev, q) \
	snd_seq_ev_set_queue_control(ev, SND_SEQ_EVENT_CONTINUE, q, 0)

/**
 * \brief set the stop queue event
 * \param ev event record
 * \param q queue id to change tempo
 * \param val the new tempo value
 */
#define snd_seq_ev_set_queue_tempo(ev, q, val) \
	snd_seq_ev_set_queue_control(ev, SND_SEQ_EVENT_TEMPO, q, val)

/**
 * \brief set the real-time position of a queue
 * \param ev event record
 * \param q queue id to change tempo
 * \param rtime the new real-time pointer
 */
#define snd_seq_ev_set_queue_pos_real(ev, q, rtime) \
	((ev)->type = SND_SEQ_EVENT_SETPOS_TIME,\
	 snd_seq_ev_set_dest(ev, SND_SEQ_CLIENT_SYSTEM, SND_SEQ_PORT_SYSTEM_TIMER),\
	 (ev)->data.queue.queue = (q),\
	 (ev)->data.queue.param.time.time = *(rtime))

/**
 * \brief set the tick-time position of a queue
 * \param ev event record
 * \param q queue id to change tempo
 * \param ttime the new tick-time
 */
#define snd_seq_ev_set_queue_pos_tick(ev, q, ttime) \
	((ev)->type = SND_SEQ_EVENT_SETPOS_TICK,\
	 snd_seq_ev_set_dest(ev, SND_SEQ_CLIENT_SYSTEM, SND_SEQ_PORT_SYSTEM_TIMER),\
	 (ev)->data.queue.queue = (q),\
	 (ev)->data.queue.param.time.tick = (ttime))

/**
 * \brief set the event UMP flag
 * \param ev event record
 */
static inline void snd_seq_ev_set_ump(snd_seq_ump_event_t *ev)
{
	ev->flags |= SND_SEQ_EVENT_UMP;
	ev->type = 0; /* unused for UMP */
}

/**
 * \brief set the event UMP flag and fill UMP raw bytes
 * \param ev event record
 * \param data UMP packet data
 * \param bytes UMP packet size in bytes
 */
static inline int snd_seq_ev_set_ump_data(snd_seq_ump_event_t *ev, void *data, size_t bytes)
{
	if (bytes > 16)
		return -EINVAL;
	snd_seq_ev_set_ump(ev);
	memcpy(ev->ump, data, bytes);
	return 0;
}

/* set and send a queue control event */
int snd_seq_control_queue(snd_seq_t *seq, int q, int type, int value, snd_seq_event_t *ev);

/**
 * \brief start the specified queue
 * \param seq sequencer handle
 * \param q queue id to start
 * \param ev optional event record (see #snd_seq_control_queue)
 */
#define snd_seq_start_queue(seq, q, ev) \
	snd_seq_control_queue(seq, q, SND_SEQ_EVENT_START, 0, ev)

/**
 * \brief stop the specified queue
 * \param seq sequencer handle
 * \param q queue id to stop
 * \param ev optional event record (see #snd_seq_control_queue)
 */
#define snd_seq_stop_queue(seq, q, ev) \
	snd_seq_control_queue(seq, q, SND_SEQ_EVENT_STOP, 0, ev)

/**
 * \brief continue the specified queue
 * \param seq sequencer handle
 * \param q queue id to continue
 * \param ev optional event record (see #snd_seq_control_queue)
 */
#define snd_seq_continue_queue(seq, q, ev) \
	snd_seq_control_queue(seq, q, SND_SEQ_EVENT_CONTINUE, 0, ev)

/**
 * \brief change the tempo of the specified queue
 * \param seq sequencer handle
 * \param q queue id
 * \param tempo the new tempo value
 * \param ev optional event record (see #snd_seq_control_queue)
 */
#define snd_seq_change_queue_tempo(seq, q, tempo, ev) \
	snd_seq_control_queue(seq, q, SND_SEQ_EVENT_TEMPO, tempo, ev)

/* create a port - simple version - return the port number */
int snd_seq_create_simple_port(snd_seq_t *seq, const char *name,
			       unsigned int caps, unsigned int type);
/* delete the port */
int snd_seq_delete_simple_port(snd_seq_t *seq, int port);

/* simple subscription between this port and another port
   (w/o exclusive & time conversion)
   */
int snd_seq_connect_from(snd_seq_t *seq, int my_port, int src_client, int src_port);
int snd_seq_connect_to(snd_seq_t *seq, int my_port, int dest_client, int dest_port);
int snd_seq_disconnect_from(snd_seq_t *seq, int my_port, int src_client, int src_port);
int snd_seq_disconnect_to(snd_seq_t *seq, int my_port, int dest_client, int dest_port);

/*
 * set client information
 */
int snd_seq_set_client_name(snd_seq_t *seq, const char *name);
int snd_seq_set_client_event_filter(snd_seq_t *seq, int event_type);
int snd_seq_set_client_midi_version(snd_seq_t *seq, int midi_version);
int snd_seq_set_client_ump_conversion(snd_seq_t *seq, int enable);
int snd_seq_set_client_pool_output(snd_seq_t *seq, size_t size);
int snd_seq_set_client_pool_output_room(snd_seq_t *seq, size_t size);
int snd_seq_set_client_pool_input(snd_seq_t *seq, size_t size);
/* sync output queue */
int snd_seq_sync_output_queue(snd_seq_t *seq);

/*
 * parse the given string and get the sequencer address
 */
int snd_seq_parse_address(snd_seq_t *seq, snd_seq_addr_t *addr, const char *str);

/*
 * reset client input/output pool
 */
int snd_seq_reset_pool_output(snd_seq_t *seq);
int snd_seq_reset_pool_input(snd_seq_t *seq);

/**
 * \brief set note event
 * \param ev event record
 * \param ch channel number
 * \param key note key
 * \param vel velocity
 * \param dur duration (in tick or msec)
 */
#define snd_seq_ev_set_note(ev, ch, key, vel, dur) \
	((ev)->type = SND_SEQ_EVENT_NOTE,\
	 snd_seq_ev_set_fixed(ev),\
	 (ev)->data.note.channel = (ch),\
	 (ev)->data.note.note = (key),\
	 (ev)->data.note.velocity = (vel),\
	 (ev)->data.note.duration = (dur))

/**
 * \brief set note-on event
 * \param ev event record
 * \param ch channel number
 * \param key note key
 * \param vel velocity
 */
#define snd_seq_ev_set_noteon(ev, ch, key, vel) \
	((ev)->type = SND_SEQ_EVENT_NOTEON,\
	 snd_seq_ev_set_fixed(ev),\
	 (ev)->data.note.channel = (ch),\
	 (ev)->data.note.note = (key),\
	 (ev)->data.note.velocity = (vel))

/**
 * \brief set note-off event
 * \param ev event record
 * \param ch channel number
 * \param key note key
 * \param vel velocity
 */
#define snd_seq_ev_set_noteoff(ev, ch, key, vel) \
	((ev)->type = SND_SEQ_EVENT_NOTEOFF,\
	 snd_seq_ev_set_fixed(ev),\
	 (ev)->data.note.channel = (ch),\
	 (ev)->data.note.note = (key),\
	 (ev)->data.note.velocity = (vel))

/**
 * \brief set key-pressure event
 * \param ev event record
 * \param ch channel number
 * \param key note key
 * \param vel velocity
 */
#define snd_seq_ev_set_keypress(ev,ch,key,vel) \
	((ev)->type = SND_SEQ_EVENT_KEYPRESS,\
	 snd_seq_ev_set_fixed(ev),\
	 (ev)->data.note.channel = (ch),\
	 (ev)->data.note.note = (key),\
	 (ev)->data.note.velocity = (vel))

/**
 * \brief set MIDI controller event
 * \param ev event record
 * \param ch channel number
 * \param cc controller number
 * \param val control value
 */
#define snd_seq_ev_set_controller(ev,ch,cc,val) \
	((ev)->type = SND_SEQ_EVENT_CONTROLLER,\
	 snd_seq_ev_set_fixed(ev),\
	 (ev)->data.control.channel = (ch),\
	 (ev)->data.control.param = (cc),\
	 (ev)->data.control.value = (val))

/**
 * \brief set program change event
 * \param ev event record
 * \param ch channel number
 * \param val program number
 */
#define snd_seq_ev_set_pgmchange(ev,ch,val) \
	((ev)->type = SND_SEQ_EVENT_PGMCHANGE,\
	 snd_seq_ev_set_fixed(ev),\
	 (ev)->data.control.channel = (ch),\
	 (ev)->data.control.value = (val))

/**
 * \brief set pitch-bend event
 * \param ev event record
 * \param ch channel number
 * \param val pitch bend; zero centered from -8192 to 8191
 */
#define snd_seq_ev_set_pitchbend(ev,ch,val) \
	((ev)->type = SND_SEQ_EVENT_PITCHBEND,\
	 snd_seq_ev_set_fixed(ev),\
	 (ev)->data.control.channel = (ch),\
	 (ev)->data.control.value = (val))

/**
 * \brief set channel pressure event
 * \param ev event record
 * \param ch channel number
 * \param val channel pressure value
 */
#define snd_seq_ev_set_chanpress(ev,ch,val) \
	((ev)->type = SND_SEQ_EVENT_CHANPRESS,\
	 snd_seq_ev_set_fixed(ev),\
	 (ev)->data.control.channel = (ch),\
	 (ev)->data.control.value = (val))

/**
 * \brief set sysex event
 * \param ev event record
 * \param datalen length of sysex data
 * \param dataptr sysex data pointer
 *
 * the sysex data must contain the start byte 0xf0 and the end byte 0xf7.
 */
#define snd_seq_ev_set_sysex(ev,datalen,dataptr) \
	((ev)->type = SND_SEQ_EVENT_SYSEX,\
	 snd_seq_ev_set_variable(ev, datalen, dataptr))

/* Helper API functions for UMP endpoint and block creations */
int snd_seq_create_ump_endpoint(snd_seq_t *seq,
				const snd_ump_endpoint_info_t *info,
				unsigned int num_groups);
int snd_seq_create_ump_block(snd_seq_t *seq, int blkid,
			     const snd_ump_block_info_t *info);

/** \} */

#ifdef __cplusplus
}
#endif

#endif /* __ALSA_SEQMID_H */