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https://gitee.com/openharmony/third_party_alsa-lib
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491 lines
14 KiB
C
491 lines
14 KiB
C
/**
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* \file include/seqmid.h
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* \brief Application interface library for the ALSA driver
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* \author Jaroslav Kysela <perex@perex.cz>
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* \author Abramo Bagnara <abramo@alsa-project.org>
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* \author Takashi Iwai <tiwai@suse.de>
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* \date 1998-2001
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*
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* Application interface library for the ALSA driver
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*/
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/*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef __ALSA_SEQMID_H
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#define __ALSA_SEQMID_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \defgroup SeqMiddle Sequencer Middle Level Interface
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* Sequencer Middle Level Interface
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* \ingroup Sequencer
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* \{
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*/
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/**
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* \brief initialize event record
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* \param ev event record pointer
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*
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* This macro clears the given event record pointer to the default status.
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*/
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#define snd_seq_ev_clear(ev) \
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memset(ev, 0, sizeof(snd_seq_event_t))
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/**
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* \brief set the tag for given event
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* \param ev event record
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* \param t event tag
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*
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* This macro sets the tag to the given event record.
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*/
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#define snd_seq_ev_set_tag(ev,t) \
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((ev)->tag = (t))
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/**
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* \brief set the explicit destination
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* \param ev event record
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* \param c destination client id
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* \param p destination port id
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*
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* This macro sets the client and port id numbers to the given event record.
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*
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* \sa snd_seq_ev_set_subs()
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*/
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#define snd_seq_ev_set_dest(ev,c,p) \
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((ev)->dest.client = (c), (ev)->dest.port = (p))
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/**
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* \brief set broadcasting to subscribers
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* \param ev event record
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*
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* This macro sets the destination as the subscribers.
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*
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* \sa snd_seq_ev_set_dest()
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*/
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#define snd_seq_ev_set_subs(ev) \
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((ev)->dest.client = SND_SEQ_ADDRESS_SUBSCRIBERS,\
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(ev)->dest.port = SND_SEQ_ADDRESS_UNKNOWN)
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/**
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* \brief set broadcasting to all clients/ports
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* \param ev event record
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*
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* This macro sets the destination as the broadcasting.
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*
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* \sa snd_seq_ev_set_dest()
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*/
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#define snd_seq_ev_set_broadcast(ev) \
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((ev)->dest.client = SND_SEQ_ADDRESS_BROADCAST,\
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(ev)->dest.port = SND_SEQ_ADDRESS_BROADCAST)
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/**
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* \brief set the source port
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* \param ev event record
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* \param p source port id
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*
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* This macro sets the source port id number.
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*/
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#define snd_seq_ev_set_source(ev,p) \
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((ev)->source.port = (p))
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/**
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* \brief set direct passing mode (without queued)
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* \param ev event instance
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*
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* This macro sets the event to the direct passing mode
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* to be delivered immediately without queueing.
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*
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* \sa snd_seq_ev_schedule_tick(), snd_seq_ev_schedule_real()
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*/
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#define snd_seq_ev_set_direct(ev) \
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((ev)->queue = SND_SEQ_QUEUE_DIRECT)
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/**
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* \brief set tick-scheduling mode on queue
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* \param ev event instance
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* \param q queue id to schedule
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* \param relative relative time-stamp if non-zero
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* \param ttick tick time-stamp to be delivered
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*
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* This macro sets the scheduling of the event in the
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* MIDI tick mode.
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*
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* \sa snd_seq_ev_schedule_real(), snd_seq_ev_set_direct()
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*/
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#define snd_seq_ev_schedule_tick(ev, q, relative, ttick) \
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((ev)->flags &= ~(SND_SEQ_TIME_STAMP_MASK | SND_SEQ_TIME_MODE_MASK),\
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(ev)->flags |= SND_SEQ_TIME_STAMP_TICK,\
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(ev)->flags |= (relative) ? SND_SEQ_TIME_MODE_REL : SND_SEQ_TIME_MODE_ABS,\
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(ev)->time.tick = (ttick),\
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(ev)->queue = (q))
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/**
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* \brief set real-time-scheduling mode on queue
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* \param ev event instance
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* \param q queue id to schedule
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* \param relative relative time-stamp if non-zero
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* \param rtime time-stamp to be delivered
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*
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* This macro sets the scheduling of the event in the
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* realtime mode.
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*
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* \sa snd_seq_ev_schedule_tick(), snd_seq_ev_set_direct()
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*/
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#define snd_seq_ev_schedule_real(ev, q, relative, rtime) \
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((ev)->flags &= ~(SND_SEQ_TIME_STAMP_MASK | SND_SEQ_TIME_MODE_MASK),\
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(ev)->flags |= SND_SEQ_TIME_STAMP_REAL,\
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(ev)->flags |= (relative) ? SND_SEQ_TIME_MODE_REL : SND_SEQ_TIME_MODE_ABS,\
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(ev)->time.time = *(rtime),\
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(ev)->queue = (q))
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/**
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* \brief set event priority
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* \param ev event instance
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* \param high_prior 1 for high priority mode
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*/
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#define snd_seq_ev_set_priority(ev, high_prior) \
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((ev)->flags &= ~SND_SEQ_PRIORITY_MASK,\
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(ev)->flags |= (high_prior) ? SND_SEQ_PRIORITY_HIGH : SND_SEQ_PRIORITY_NORMAL)
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/**
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* \brief set fixed data
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* \param ev event instance
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*
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* Sets the event length mode as fixed size.
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*
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* \sa snd_seq_ev_set_variable(), snd_seq_ev_set_varusr()
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*/
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#define snd_seq_ev_set_fixed(ev) \
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((ev)->flags &= ~SND_SEQ_EVENT_LENGTH_MASK,\
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(ev)->flags |= SND_SEQ_EVENT_LENGTH_FIXED)
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/**
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* \brief set variable data
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* \param ev event instance
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* \param datalen length of the external data
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* \param dataptr pointer of the external data
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*
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* Sets the event length mode as variable length and stores the data.
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*
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* \sa snd_seq_ev_set_fixed(), snd_seq_ev_set_varusr()
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*/
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#define snd_seq_ev_set_variable(ev, datalen, dataptr) \
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((ev)->flags &= ~SND_SEQ_EVENT_LENGTH_MASK,\
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(ev)->flags |= SND_SEQ_EVENT_LENGTH_VARIABLE,\
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(ev)->data.ext.len = (datalen),\
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(ev)->data.ext.ptr = (dataptr))
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/**
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* \brief set varusr data
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* \param ev event instance
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* \param datalen length of the external data
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* \param dataptr pointer of the external data
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*
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* Sets the event length mode as variable user-space data and stores the data.
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*
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* \sa snd_seq_ev_set_fixed(), snd_seq_ev_set_variable()
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*/
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#define snd_seq_ev_set_varusr(ev, datalen, dataptr) \
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((ev)->flags &= ~SND_SEQ_EVENT_LENGTH_MASK,\
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(ev)->flags |= SND_SEQ_EVENT_LENGTH_VARUSR,\
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(ev)->data.ext.len = (datalen),\
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(ev)->data.ext.ptr = (dataptr))
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/**
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* \brief set queue controls
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* \param ev event record
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* \param typ event type
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* \param q queue id
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* \param val control value
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*/
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#define snd_seq_ev_set_queue_control(ev, typ, q, val) \
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((ev)->type = (typ),\
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snd_seq_ev_set_dest(ev, SND_SEQ_CLIENT_SYSTEM, SND_SEQ_PORT_SYSTEM_TIMER),\
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(ev)->data.queue.queue = (q),\
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(ev)->data.queue.param.value = (val))
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/**
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* \brief set the start queue event
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* \param ev event record
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* \param q queue id to start
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*
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* \sa snd_seq_ev_set_queue_stop(), snd_seq_ev_set_queue_continue()
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*/
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#define snd_seq_ev_set_queue_start(ev, q) \
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snd_seq_ev_set_queue_control(ev, SND_SEQ_EVENT_START, q, 0)
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/**
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* \brief set the stop queue event
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* \param ev event record
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* \param q queue id to stop
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*
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* \sa snd_seq_ev_set_queue_start(), snd_seq_ev_set_queue_continue()
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*/
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#define snd_seq_ev_set_queue_stop(ev, q) \
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snd_seq_ev_set_queue_control(ev, SND_SEQ_EVENT_STOP, q, 0)
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/**
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* \brief set the stop queue event
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* \param ev event record
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* \param q queue id to continue
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*
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* \sa snd_seq_ev_set_queue_start(), snd_seq_ev_set_queue_stop()
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*/
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#define snd_seq_ev_set_queue_continue(ev, q) \
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snd_seq_ev_set_queue_control(ev, SND_SEQ_EVENT_CONTINUE, q, 0)
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/**
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* \brief set the stop queue event
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* \param ev event record
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* \param q queue id to change tempo
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* \param val the new tempo value
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*/
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#define snd_seq_ev_set_queue_tempo(ev, q, val) \
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snd_seq_ev_set_queue_control(ev, SND_SEQ_EVENT_TEMPO, q, val)
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/**
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* \brief set the real-time position of a queue
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* \param ev event record
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* \param q queue id to change tempo
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* \param rtime the new real-time pointer
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*/
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#define snd_seq_ev_set_queue_pos_real(ev, q, rtime) \
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((ev)->type = SND_SEQ_EVENT_SETPOS_TIME,\
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snd_seq_ev_set_dest(ev, SND_SEQ_CLIENT_SYSTEM, SND_SEQ_PORT_SYSTEM_TIMER),\
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(ev)->data.queue.queue = (q),\
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(ev)->data.queue.param.time.time = *(rtime))
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/**
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* \brief set the tick-time position of a queue
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* \param ev event record
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* \param q queue id to change tempo
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* \param ttime the new tick-time
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*/
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#define snd_seq_ev_set_queue_pos_tick(ev, q, ttime) \
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((ev)->type = SND_SEQ_EVENT_SETPOS_TICK,\
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snd_seq_ev_set_dest(ev, SND_SEQ_CLIENT_SYSTEM, SND_SEQ_PORT_SYSTEM_TIMER),\
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(ev)->data.queue.queue = (q),\
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(ev)->data.queue.param.time.tick = (ttime))
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/* set and send a queue control event */
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int snd_seq_control_queue(snd_seq_t *seq, int q, int type, int value, snd_seq_event_t *ev);
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/**
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* \brief start the specified queue
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* \param seq sequencer handle
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* \param q queue id to start
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* \param ev optional event record (see #snd_seq_control_queue)
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*/
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#define snd_seq_start_queue(seq, q, ev) \
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snd_seq_control_queue(seq, q, SND_SEQ_EVENT_START, 0, ev)
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/**
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* \brief stop the specified queue
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* \param seq sequencer handle
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* \param q queue id to stop
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* \param ev optional event record (see #snd_seq_control_queue)
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*/
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#define snd_seq_stop_queue(seq, q, ev) \
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snd_seq_control_queue(seq, q, SND_SEQ_EVENT_STOP, 0, ev)
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/**
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* \brief continue the specified queue
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* \param seq sequencer handle
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* \param q queue id to continue
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* \param ev optional event record (see #snd_seq_control_queue)
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*/
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#define snd_seq_continue_queue(seq, q, ev) \
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snd_seq_control_queue(seq, q, SND_SEQ_EVENT_CONTINUE, 0, ev)
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/**
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* \brief change the tempo of the specified queue
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* \param seq sequencer handle
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* \param q queue id
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* \param tempo the new tempo value
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* \param ev optional event record (see #snd_seq_control_queue)
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*/
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#define snd_seq_change_queue_tempo(seq, q, tempo, ev) \
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snd_seq_control_queue(seq, q, SND_SEQ_EVENT_TEMPO, tempo, ev)
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/* create a port - simple version - return the port number */
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int snd_seq_create_simple_port(snd_seq_t *seq, const char *name,
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unsigned int caps, unsigned int type);
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/* delete the port */
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int snd_seq_delete_simple_port(snd_seq_t *seq, int port);
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/* simple subscription between this port and another port
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(w/o exclusive & time conversion)
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*/
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int snd_seq_connect_from(snd_seq_t *seq, int my_port, int src_client, int src_port);
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int snd_seq_connect_to(snd_seq_t *seq, int my_port, int dest_client, int dest_port);
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int snd_seq_disconnect_from(snd_seq_t *seq, int my_port, int src_client, int src_port);
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int snd_seq_disconnect_to(snd_seq_t *seq, int my_port, int dest_client, int dest_port);
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/*
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* set client information
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*/
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int snd_seq_set_client_name(snd_seq_t *seq, const char *name);
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int snd_seq_set_client_event_filter(snd_seq_t *seq, int event_type);
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int snd_seq_set_client_pool_output(snd_seq_t *seq, size_t size);
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int snd_seq_set_client_pool_output_room(snd_seq_t *seq, size_t size);
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int snd_seq_set_client_pool_input(snd_seq_t *seq, size_t size);
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/* sync output queue */
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int snd_seq_sync_output_queue(snd_seq_t *seq);
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/*
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* parse the given string and get the sequencer address
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*/
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int snd_seq_parse_address(snd_seq_t *seq, snd_seq_addr_t *addr, const char *str);
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/*
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* reset client input/output pool
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*/
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int snd_seq_reset_pool_output(snd_seq_t *seq);
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int snd_seq_reset_pool_input(snd_seq_t *seq);
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/**
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* \brief set note event
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* \param ev event record
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* \param ch channel number
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* \param key note key
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* \param vel velocity
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* \param dur duration (in tick or msec)
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*/
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#define snd_seq_ev_set_note(ev, ch, key, vel, dur) \
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((ev)->type = SND_SEQ_EVENT_NOTE,\
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snd_seq_ev_set_fixed(ev),\
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(ev)->data.note.channel = (ch),\
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(ev)->data.note.note = (key),\
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(ev)->data.note.velocity = (vel),\
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(ev)->data.note.duration = (dur))
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/**
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* \brief set note-on event
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* \param ev event record
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* \param ch channel number
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* \param key note key
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* \param vel velocity
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*/
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#define snd_seq_ev_set_noteon(ev, ch, key, vel) \
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((ev)->type = SND_SEQ_EVENT_NOTEON,\
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snd_seq_ev_set_fixed(ev),\
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(ev)->data.note.channel = (ch),\
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(ev)->data.note.note = (key),\
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(ev)->data.note.velocity = (vel))
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/**
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* \brief set note-off event
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* \param ev event record
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* \param ch channel number
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* \param key note key
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* \param vel velocity
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*/
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#define snd_seq_ev_set_noteoff(ev, ch, key, vel) \
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((ev)->type = SND_SEQ_EVENT_NOTEOFF,\
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snd_seq_ev_set_fixed(ev),\
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(ev)->data.note.channel = (ch),\
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(ev)->data.note.note = (key),\
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(ev)->data.note.velocity = (vel))
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/**
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* \brief set key-pressure event
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* \param ev event record
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* \param ch channel number
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* \param key note key
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* \param vel velocity
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*/
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#define snd_seq_ev_set_keypress(ev,ch,key,vel) \
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((ev)->type = SND_SEQ_EVENT_KEYPRESS,\
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snd_seq_ev_set_fixed(ev),\
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(ev)->data.note.channel = (ch),\
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(ev)->data.note.note = (key),\
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(ev)->data.note.velocity = (vel))
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/**
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* \brief set MIDI controller event
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* \param ev event record
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* \param ch channel number
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* \param cc controller number
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* \param val control value
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*/
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#define snd_seq_ev_set_controller(ev,ch,cc,val) \
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((ev)->type = SND_SEQ_EVENT_CONTROLLER,\
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snd_seq_ev_set_fixed(ev),\
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(ev)->data.control.channel = (ch),\
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(ev)->data.control.param = (cc),\
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(ev)->data.control.value = (val))
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/**
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* \brief set program change event
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* \param ev event record
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* \param ch channel number
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* \param val program number
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*/
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#define snd_seq_ev_set_pgmchange(ev,ch,val) \
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((ev)->type = SND_SEQ_EVENT_PGMCHANGE,\
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snd_seq_ev_set_fixed(ev),\
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(ev)->data.control.channel = (ch),\
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(ev)->data.control.value = (val))
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/**
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* \brief set pitch-bend event
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* \param ev event record
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* \param ch channel number
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* \param val pitch bend; zero centered from -8192 to 8191
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*/
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#define snd_seq_ev_set_pitchbend(ev,ch,val) \
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((ev)->type = SND_SEQ_EVENT_PITCHBEND,\
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snd_seq_ev_set_fixed(ev),\
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(ev)->data.control.channel = (ch),\
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(ev)->data.control.value = (val))
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/**
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* \brief set channel pressure event
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* \param ev event record
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* \param ch channel number
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* \param val channel pressure value
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*/
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#define snd_seq_ev_set_chanpress(ev,ch,val) \
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((ev)->type = SND_SEQ_EVENT_CHANPRESS,\
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snd_seq_ev_set_fixed(ev),\
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(ev)->data.control.channel = (ch),\
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(ev)->data.control.value = (val))
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/**
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* \brief set sysex event
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* \param ev event record
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* \param datalen length of sysex data
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* \param dataptr sysex data pointer
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*
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* the sysex data must contain the start byte 0xf0 and the end byte 0xf7.
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*/
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#define snd_seq_ev_set_sysex(ev,datalen,dataptr) \
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((ev)->type = SND_SEQ_EVENT_SYSEX,\
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snd_seq_ev_set_variable(ev, datalen, dataptr))
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/** \} */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ALSA_SEQMID_H */
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