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minix/sys/sys/midiio.h
Ben Gras 6c8f7fc3ba netbsd dirent.h, import sys/sys *.h, mfs cleanup 
. add all sys/sys headers not already present to help compiling
	. take netbsd dirent.h and struct dirent; main result is
	  introducing d_type and d_namlen that have to be set by getdents()
	  in all FS code implementing it
	. d_off is gone
	. alignment of the struct has become 8 bytes instead of 4
	. remove _MAX_BLOCK_SIZE, _MIN_BLOCK_SIZE, _STATIC_BLOCK_SIZE
	. libminlib: cleanup unused yet duplicate code
	. mfs: throw out the long-broken v1, v2 support
	. new test for dirent contents filled by getdents()

Change-Id: I1459755c7ba5e5d1c9396d3a587ce6e63ddc283e
2014-03-01 09:04:59 +01:00

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/* $NetBSD: midiio.h,v 1.15 2008/04/28 20:24:11 martin Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson (augustss@NetBSD.org) and (native API structures
* and macros) Chapman Flack (chap@NetBSD.org).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SYS_MIDIIO_H_
#define _SYS_MIDIIO_H_
/*
* The API defined here produces events compatible with the OSS MIDI API at
* the binary level.
*/
#include <machine/endian_machdep.h>
/*
* ioctl() commands for /dev/midi##
* XXX is directly frobbing an MPU401 even supported? isn't it just run
* in UART mode?
*/
typedef struct {
unsigned char cmd;
char nr_args, nr_returns;
unsigned char data[30];
} mpu_command_rec;
#define MIDI_PRETIME _IOWR('m', 0, int)
#define MIDI_MPUMODE _IOWR('m', 1, int)
#define MIDI_MPUCMD _IOWR('m', 2, mpu_command_rec)
/* The MPU401 command acknowledge and active sense command */
#define MIDI_ACK 0xfe
/* Sequencer */
#define SEQUENCER_RESET _IO ('Q', 0)
#define SEQUENCER_SYNC _IO ('Q', 1)
#define SEQUENCER_INFO _IOWR('Q', 2, struct synth_info)
#define SEQUENCER_CTRLRATE _IOWR('Q', 3, int)
#define SEQUENCER_GETOUTCOUNT _IOR ('Q', 4, int)
#define SEQUENCER_GETINCOUNT _IOR ('Q', 5, int)
/*#define SEQUENCER_PERCMODE _IOW ('Q', 6, int)*/
/*#define SEQUENCER_TESTMIDI _IOW ('Q', 8, int)*/
#define SEQUENCER_RESETSAMPLES _IOW ('Q', 9, int)
/*
* The sequencer at present makes no distinction between a 'synth' and a 'midi'.
* This is actually a cleaner layering than OSS: devices that are onboard
* synths just attach midi(4) via midisyn and present an ordinary MIDI face to
* the system. At present the same number is returned for NRSYNTHS and NRMIDIS
* but don't believe both, or you'll think you have twice as many devices as
* you really have. The MIDI_INFO ioctl isn't implemented; use SEQUENCER_INFO
* (which corresponds to OSS's SYNTH_INFO) to get information on any kind of
* device, though the struct synth_info it uses has some members that only
* pertain to synths (and get filled in with fixed, probably wrong values,
* anyway).
*/
#define SEQUENCER_NRSYNTHS _IOR ('Q',10, int)
#define SEQUENCER_NRMIDIS _IOR ('Q',11, int)
/*#define SEQUENCER_MIDI_INFO _IOWR('Q',12, struct midi_info)*/
#define SEQUENCER_THRESHOLD _IOW ('Q',13, int)
#define SEQUENCER_MEMAVL _IOWR('Q',14, int)
/*#define SEQUENCER_FM_4OP_ENABLE _IOW ('Q',15, int)*/
#define SEQUENCER_PANIC _IO ('Q',17)
#define SEQUENCER_OUTOFBAND _IOW ('Q',18, struct seq_event_rec)
#define SEQUENCER_GETTIME _IOR ('Q',19, int)
/*#define SEQUENCER_ID _IOWR('Q',20, struct synth_info)*/
/*#define SEQUENCER_CONTROL _IOWR('Q',21, struct synth_control)*/
/*#define SEQUENCER_REMOVESAMPLE _IOWR('Q',22, struct remove_sample)*/
#if 0
typedef struct synth_control {
int devno; /* Synthesizer # */
char data[4000]; /* Device specific command/data record */
} synth_control;
typedef struct remove_sample {
int devno; /* Synthesizer # */
int bankno; /* MIDI bank # (0=General MIDI) */
int instrno; /* MIDI instrument number */
} remove_sample;
#endif
#define CMDSIZE 8
typedef struct seq_event_rec {
u_char arr[CMDSIZE];
} seq_event_rec;
struct synth_info {
char name[30];
int device;
int synth_type;
#define SYNTH_TYPE_FM 0
#define SYNTH_TYPE_SAMPLE 1
#define SYNTH_TYPE_MIDI 2
int synth_subtype;
#define SYNTH_SUB_FM_TYPE_ADLIB 0x00
#define SYNTH_SUB_FM_TYPE_OPL3 0x01
#define SYNTH_SUB_MIDI_TYPE_MPU401 0x401
#define SYNTH_SUB_SAMPLE_TYPE_BASIC 0x10
#define SYNTH_SUB_SAMPLE_TYPE_GUS SAMPLE_TYPE_BASIC
int nr_voices;
int instr_bank_size;
u_int capabilities;
#define SYNTH_CAP_OPL3 0x00000002
#define SYNTH_CAP_INPUT 0x00000004
};
/* Sequencer timer */
#define SEQUENCER_TMR_TIMEBASE _IOWR('T', 1, int)
#define SEQUENCER_TMR_START _IO ('T', 2)
#define SEQUENCER_TMR_STOP _IO ('T', 3)
#define SEQUENCER_TMR_CONTINUE _IO ('T', 4)
#define SEQUENCER_TMR_TEMPO _IOWR('T', 5, int)
#define SEQUENCER_TMR_SOURCE _IOWR('T', 6, int)
# define SEQUENCER_TMR_INTERNAL 0x00000001
#if 0
# define SEQUENCER_TMR_EXTERNAL 0x00000002
# define SEQUENCER_TMR_MODE_MIDI 0x00000010
# define SEQUENCER_TMR_MODE_FSK 0x00000020
# define SEQUENCER_TMR_MODE_CLS 0x00000040
# define SEQUENCER_TMR_MODE_SMPTE 0x00000080
#endif
#define SEQUENCER_TMR_METRONOME _IOW ('T', 7, int)
#define SEQUENCER_TMR_SELECT _IOW ('T', 8, int)
#define MIDI_CTRL_BANK_SELECT_MSB 0
#define MIDI_CTRL_MODULATION_MSB 1
#define MIDI_CTRL_BREATH_MSB 2
#define MIDI_CTRL_FOOT_MSB 4
#define MIDI_CTRL_PORTAMENTO_TIME_MSB 5
#define MIDI_CTRL_DATA_ENTRY_MSB 6
#define MIDI_CTRL_CHANNEL_VOLUME_MSB 7
#define MIDI_CTRL_BALANCE_MSB 8
#define MIDI_CTRL_PAN_MSB 10
#define MIDI_CTRL_EXPRESSION_MSB 11
#define MIDI_CTRL_EFFECT_1_MSB 12
#define MIDI_CTRL_EFFECT_2_MSB 13
#define MIDI_CTRL_GENERAL_PURPOSE_1_MSB 16
#define MIDI_CTRL_GENERAL_PURPOSE_2_MSB 17
#define MIDI_CTRL_GENERAL_PURPOSE_3_MSB 18
#define MIDI_CTRL_GENERAL_PURPOSE_4_MSB 19
#define MIDI_CTRL_BANK_SELECT_LSB 32
#define MIDI_CTRL_MODULATION_LSB 33
#define MIDI_CTRL_BREATH_LSB 34
#define MIDI_CTRL_FOOT_LSB 36
#define MIDI_CTRL_PORTAMENTO_TIME_LSB 37
#define MIDI_CTRL_DATA_ENTRY_LSB 38
#define MIDI_CTRL_CHANNEL_VOLUME_LSB 39
#define MIDI_CTRL_BALANCE_LSB 40
#define MIDI_CTRL_PAN_LSB 42
#define MIDI_CTRL_EXPRESSION_LSB 43
#define MIDI_CTRL_EFFECT_1_LSB 44
#define MIDI_CTRL_EFFECT_2_LSB 45
#define MIDI_CTRL_GENERAL_PURPOSE_1_LSB 48
#define MIDI_CTRL_GENERAL_PURPOSE_2_LSB 49
#define MIDI_CTRL_GENERAL_PURPOSE_3_LSB 50
#define MIDI_CTRL_GENERAL_PURPOSE_4_LSB 51
#define MIDI_CTRL_HOLD_1 64
#define MIDI_CTRL_PORTAMENTO 65
#define MIDI_CTRL_SOSTENUTO 66
#define MIDI_CTRL_SOFT_PEDAL 67
#define MIDI_CTRL_LEGATO 68
#define MIDI_CTRL_HOLD_2 69
#define MIDI_CTRL_SOUND_VARIATION 70
#define MIDI_CTRL_HARMONIC_INTENSITY 71
#define MIDI_CTRL_RELEASE_TIME 72
#define MIDI_CTRL_ATTACK_TIME 73
#define MIDI_CTRL_BRIGHTNESS 74
#define MIDI_CTRL_DECAY_TIME 75
#define MIDI_CTRL_VIBRATO_RATE 76
#define MIDI_CTRL_VIBRATO_DEPTH 77
#define MIDI_CTRL_VIBRATO_DELAY 78
#define MIDI_CTRL_VIBRATO_DECAY MIDI_CTRL_VIBRATO_DELAY /*deprecated*/
#define MIDI_CTRL_SOUND_10 79
#define MIDI_CTRL_GENERAL_PURPOSE_5 80
#define MIDI_CTRL_GENERAL_PURPOSE_6 81
#define MIDI_CTRL_GENERAL_PURPOSE_7 82
#define MIDI_CTRL_GENERAL_PURPOSE_8 83
#define MIDI_CTRL_PORTAMENTO_CONTROL 84
#define MIDI_CTRL_EFFECT_DEPTH_1 91
#define MIDI_CTRL_EFFECT_DEPTH_2 92
#define MIDI_CTRL_EFFECT_DEPTH_3 93
#define MIDI_CTRL_EFFECT_DEPTH_4 94
#define MIDI_CTRL_EFFECT_DEPTH_5 95
#define MIDI_CTRL_RPN_INCREMENT 96
#define MIDI_CTRL_RPN_DECREMENT 97
#define MIDI_CTRL_NRPN_LSB 98
#define MIDI_CTRL_NRPN_MSB 99
#define MIDI_CTRL_RPN_LSB 100
#define MIDI_CTRL_RPN_MSB 101
#define MIDI_CTRL_SOUND_OFF 120
#define MIDI_CTRL_RESET 121
#define MIDI_CTRL_LOCAL 122
#define MIDI_CTRL_NOTES_OFF 123
#define MIDI_CTRL_ALLOFF MIDI_CTRL_NOTES_OFF /*deprecated*/
#define MIDI_CTRL_OMNI_OFF 124
#define MIDI_CTRL_OMNI_ON 125
#define MIDI_CTRL_POLY_OFF 126
#define MIDI_CTRL_POLY_ON 127
#define MIDI_BEND_NEUTRAL (1<<13)
#define MIDI_RPN_PITCH_BEND_SENSITIVITY 0
#define MIDI_RPN_CHANNEL_FINE_TUNING 1
#define MIDI_RPN_CHANNEL_COARSE_TUNING 2
#define MIDI_RPN_TUNING_PROGRAM_CHANGE 3
#define MIDI_RPN_TUNING_BANK_SELECT 4
#define MIDI_RPN_MODULATION_DEPTH_RANGE 5
#define MIDI_NOTEOFF 0x80
#define MIDI_NOTEON 0x90
#define MIDI_KEY_PRESSURE 0xA0
#define MIDI_CTL_CHANGE 0xB0
#define MIDI_PGM_CHANGE 0xC0
#define MIDI_CHN_PRESSURE 0xD0
#define MIDI_PITCH_BEND 0xE0
#define MIDI_SYSTEM_PREFIX 0xF0
#define MIDI_IS_STATUS(d) ((d) >= 0x80)
#define MIDI_IS_COMMON(d) ((d) >= 0xf0)
#define MIDI_SYSEX_START 0xF0
#define MIDI_SYSEX_END 0xF7
#define MIDI_GET_STATUS(d) ((d) & 0xf0)
#define MIDI_GET_CHAN(d) ((d) & 0x0f)
#define MIDI_HALF_VEL 64
#define SEQ_LOCAL 0x80
#define SEQ_TIMING 0x81
#define SEQ_CHN_COMMON 0x92
#define SEQ_CHN_VOICE 0x93
#define SEQ_SYSEX 0x94
#define SEQ_FULLSIZE 0xfd
#define SEQ_MK_CHN_VOICE(e, unit, cmd, chan, key, vel) (\
(e)->arr[0] = SEQ_CHN_VOICE, (e)->arr[1] = (unit), (e)->arr[2] = (cmd),\
(e)->arr[3] = (chan), (e)->arr[4] = (key), (e)->arr[5] = (vel),\
(e)->arr[6] = 0, (e)->arr[7] = 0)
#define SEQ_MK_CHN_COMMON(e, unit, cmd, chan, p1, p2, w14) (\
(e)->arr[0] = SEQ_CHN_COMMON, (e)->arr[1] = (unit), (e)->arr[2] = (cmd),\
(e)->arr[3] = (chan), (e)->arr[4] = (p1), (e)->arr[5] = (p2),\
*(short*)&(e)->arr[6] = (w14))
#if _BYTE_ORDER == _BIG_ENDIAN
/* big endian */
#define SEQ_PATCHKEY(id) (0xfd00|id)
#else
/* little endian */
#define SEQ_PATCHKEY(id) ((id<<8)|0xfd)
#endif
struct sysex_info {
uint16_t key; /* Use SYSEX_PATCH or MAUI_PATCH here */
#define SEQ_SYSEX_PATCH SEQ_PATCHKEY(0x05)
#define SEQ_MAUI_PATCH SEQ_PATCHKEY(0x06)
int16_t device_no; /* Synthesizer number */
int32_t len; /* Size of the sysex data in bytes */
u_char data[1]; /* Sysex data starts here */
};
#define SEQ_SYSEX_HDRSIZE ((u_long)((struct sysex_info *)0)->data)
typedef unsigned char sbi_instr_data[32];
struct sbi_instrument {
uint16_t key; /* FM_PATCH or OPL3_PATCH */
#define SBI_FM_PATCH SEQ_PATCHKEY(0x01)
#define SBI_OPL3_PATCH SEQ_PATCHKEY(0x03)
int16_t device;
int32_t channel;
sbi_instr_data operators;
};
#define TMR_RESET 0 /* beware: not an OSS event */
#define TMR_WAIT_REL 1 /* Time relative to the prev time */
#define TMR_WAIT_ABS 2 /* Absolute time since TMR_START */
#define TMR_STOP 3
#define TMR_START 4
#define TMR_CONTINUE 5
#define TMR_TEMPO 6
#define TMR_ECHO 8
#define TMR_CLOCK 9 /* MIDI clock */
#define TMR_SPP 10 /* Song position pointer */
#define TMR_TIMESIG 11 /* Time signature */
/* Old sequencer definitions */
#define SEQOLD_CMDSIZE 4
#define SEQOLD_NOTEOFF 0
#define SEQOLD_NOTEON 1
#define SEQOLD_WAIT TMR_WAIT_ABS
#define SEQOLD_PGMCHANGE 3
#define SEQOLD_SYNCTIMER TMR_START
#define SEQOLD_MIDIPUTC 5
#define SEQOLD_ECHO TMR_ECHO
#define SEQOLD_AFTERTOUCH 9
#define SEQOLD_CONTROLLER 10
#define SEQOLD_PRIVATE 0xfe
#define SEQOLD_EXTENDED 0xff
/*
* The 'midipitch' data type, used in the kernel between the midisyn layer and
* onboard synth drivers, and in userland as parameters to the MIDI Tuning Spec
* (RP-012) universal-system-exclusive messages. It is a MIDI key number shifted
* left to accommodate 14 bit sub-semitone resolution. In this representation,
* tuning and bending adjustments are simple addition and subtraction.
*/
typedef int32_t midipitch_t;
/*
* Nominal conversions between midipitches and key numbers. (Beware that these
* are the nominal, standard correspondences, but whole point of the MIDI Tuning
* Spec is that you can set things up so the hardware might render key N at
* actual pitch MIDIPITCH_FROM_KEY(N)+c for some correction c.)
*/
#define MIDIPITCH_FROM_KEY(k) ((k)<<14)
#define MIDIPITCH_TO_KEY(mp) (((mp)+(1<<13))>>14)
#define MIDIPITCH_MAX (MIDIPITCH_FROM_KEY(128)-2) /* ...(128)-1 is reserved */
#define MIDIPITCH_OCTAVE 196608
#define MIDIPITCH_SEMITONE 16384
#define MIDIPITCH_CENT 164 /* this, regrettably, is inexact. */
/*
* For rendering, convert a midipitch (after all tuning adjustments) to Hz.
* The conversion is DEFINED as MIDI key 69.00000 (A) === 440 Hz equal tempered
* always. Alternate tunings are obtained by adjusting midipitches.
*
* The midihz18_t (Hz shifted left for 18-bit sub-Hz resolution) covers the
* full midipitch range without losing 21-bit precision, as the lowest midipitch
* is ~8 Hz (~3 bits left of radix point, 18 right) and for the highest the
* result still fits in a uint32.
*/
typedef uint32_t midihz18_t;
#define MIDIHZ18_TO_HZ(h18) ((h18)>>18) /* truncates! ok for dbg msgs maybe */
#ifndef _KERNEL
/*
* With floating point in userland, can also manipulate midipitches as
* floating-point fractional MIDI key numbers (tuning adjustments are still
* additive), and hz18 as fractional Hz (adjustments don't add in this form).
*/
#include <math.h>
#define MIDIPITCH_TO_FRKEY(mp) (scalbn((mp),-14))
#define MIDIPITCH_FROM_FRKEY(frk) ((midipitch_t)round(scalbn((frk),14)))
#define MIDIHZ18_TO_FRHZ(h18) (scalbn((h18),-18))
#define MIDIHZ18_FROM_FRHZ(frh) ((midihz18_t)round(scalbn((frh),18)))
#define MIDIPITCH_TO_FRHZ(mp) (440*pow(2,(MIDIPITCH_TO_FRKEY((mp))-69)/12))
#define MIDIPITCH_FROM_FRHZ(fhz) \
MIDIPITCH_FROM_FRKEY(69+12*log((fhz)/440)/log(2))
#define MIDIPITCH_TO_HZ18(mp) MIDIHZ18_FROM_FRHZ(MIDIPITCH_TO_FRHZ((mp)))
#define MIDIPITCH_FROM_HZ18(h18) MIDIPITCH_FROM_FRHZ(MIDIHZ18_TO_FRHZ((h18)))
#else /* no fp in kernel; only an accurate to-hz18 conversion is implemented */
extern midihz18_t midisyn_mp2hz18(midipitch_t);
#define MIDIPITCH_TO_HZ18(mp) (midisyn_mp2hz18((mp)))
#endif /* _KERNEL */
/*
* A native API for the /dev/music sequencer device follows. The event
* structures are OSS events at the level of bytes, but for developing or
* porting applications some macros and documentation are needed to generate
* and dissect the events; here they are. For porting existing OSS applications,
* sys/soundcard.h can be extended to supply the usual OSS macros, defining them
* in terms of these.
*/
/*
* TODO: determine OSS compatible structures for TMR_RESET and TMR_CLOCK,
* OSS values of EV_SYSTEM, SNDCTL_SEQ_ACTSENSE_ENABLE,
* SNDCTL_SEQ_TIMING_ENABLE, and SNDCTL_SEQ_RT_ENABLE.
* (TMR_RESET may be a NetBSD extension: it is generated in sequencer.c and
* has no args. To be corrected if a different definition is found anywhere.)
*/
typedef union {
#define _EVT_HDR \
uint8_t tag
_EVT_HDR;
#define _LOCAL_HDR \
_EVT_HDR; \
uint8_t op
struct { _LOCAL_HDR; } local;
struct {
_LOCAL_HDR;
uint16_t _zero;
uint32_t devmask;
} l_startaudio;
/* define a constructor for local evts - someday when we support any */
#define _TIMING_HDR \
_LOCAL_HDR; \
uint16_t _zeroh
struct { _TIMING_HDR; } timing;
struct {
_TIMING_HDR;
uint32_t divisions;
} t_WAIT_REL, t_WAIT_ABS;
struct {
_TIMING_HDR;
uint32_t _zero;
} t_STOP, t_START, t_CONTINUE, t_RESET;
struct {
_TIMING_HDR;
uint32_t bpm; /* unambiguously, (MIDI clocks/minute)/24 */
} t_TEMPO;
struct {
_TIMING_HDR;
uint32_t cookie;
} t_ECHO;
struct {
_TIMING_HDR;
uint32_t midibeat; /* in low 14 bits; midibeat: 6 MIDI clocks */
} t_SPP;
struct {
_TIMING_HDR;
#if _BYTE_ORDER == _BIG_ENDIAN
uint8_t numerator;
uint8_t lg2denom;
uint8_t clks_per_click;
uint8_t dsq_per_24clks;
#elif _BYTE_ORDER == _LITTLE_ENDIAN
uint8_t dsq_per_24clks;
uint8_t clks_per_click;
uint8_t lg2denom;
uint8_t numerator;
#else
#error "unexpected _BYTE_ORDER"
#endif
} t_TIMESIG;
struct { /* use this only to implement OSS compatibility macro */
_TIMING_HDR;
uint32_t signature;
} t_osscompat_timesig;
#define _COMMON_HDR \
_EVT_HDR; \
uint8_t device; \
uint8_t op; \
uint8_t channel
struct { _COMMON_HDR; } common;
struct {
_COMMON_HDR;
uint8_t controller;
uint8_t _zero;
uint16_t value;
} c_CTL_CHANGE;
struct {
_COMMON_HDR;
uint8_t program;
uint8_t _zero0;
uint16_t _zero1;
} c_PGM_CHANGE;
struct {
_COMMON_HDR;
uint8_t pressure;
uint8_t _zero0;
uint16_t _zero1;
} c_CHN_PRESSURE;
struct {
_COMMON_HDR;
uint8_t _zero0;
uint8_t _zero1;
uint16_t value;
} c_PITCH_BEND;
#define _VOICE_HDR \
_COMMON_HDR; \
uint8_t key
struct { _VOICE_HDR; } voice;
struct {
_VOICE_HDR;
uint8_t velocity;
uint16_t _zero;
} c_NOTEOFF, c_NOTEON;
struct {
_VOICE_HDR;
uint8_t pressure;
uint16_t _zero;
} c_KEY_PRESSURE;
struct {
_EVT_HDR;
uint8_t device;
uint8_t buffer[6];
} sysex;
struct {
_EVT_HDR;
uint8_t device;
uint8_t status;
uint8_t data[2];
} system;
struct {
_EVT_HDR;
uint8_t byte;
uint8_t device;
uint8_t _zero0;
uint32_t _zero1;
} putc; /* a seqold event that's still needed at times, ugly as 'tis */
struct {
_EVT_HDR;
uint8_t byte[7];
} unknown; /* for debug/display */
#undef _VOICE_HDR
#undef _COMMON_HDR
#undef _TIMING_HDR
#undef _LOCAL_HDR
#undef _EVT_HDR
} __packed seq_event_t;
#define _SEQ_TAG_NOTEOFF SEQ_CHN_VOICE
#define _SEQ_TAG_NOTEON SEQ_CHN_VOICE
#define _SEQ_TAG_KEY_PRESSURE SEQ_CHN_VOICE
#define _SEQ_TAG_CTL_CHANGE SEQ_CHN_COMMON
#define _SEQ_TAG_PGM_CHANGE SEQ_CHN_COMMON
#define _SEQ_TAG_CHN_PRESSURE SEQ_CHN_COMMON
#define _SEQ_TAG_PITCH_BEND SEQ_CHN_COMMON
#if __STDC_VERSION__ >= 199901L
#define SEQ_MK_EVENT(_member,_tag,...) \
(seq_event_t){ ._member = { .tag = (_tag), __VA_ARGS__ } }
#define SEQ_MK_TIMING(_op,...) \
SEQ_MK_EVENT(t_##_op, SEQ_TIMING, .op = TMR_##_op, __VA_ARGS__)
#define SEQ_MK_CHN(_op,...) \
SEQ_MK_EVENT(c_##_op, _SEQ_TAG_##_op, .op = MIDI_##_op, __VA_ARGS__)
#define SEQ_MK_SYSEX(_dev,...) \
SEQ_MK_EVENT(sysex, 0x94, .device=(_dev), \
.buffer={0xff, 0xff, 0xff, 0xff, 0xff, 0xff, __VA_ARGS__})
#else /* assume gcc 2.95.3 */
#define SEQ_MK_EVENT(_member,_tag,_args...) \
(seq_event_t){ ._member = { .tag = (_tag), _args } }
#define SEQ_MK_TIMING(_op,_args...) \
SEQ_MK_EVENT(t_##_op, SEQ_TIMING, .op = TMR_##_op, _args)
#define SEQ_MK_CHN(_op,_args...) \
SEQ_MK_EVENT(c_##_op, _SEQ_TAG_##_op, .op = MIDI_##_op, _args)
#define SEQ_MK_SYSEX(_dev,_args...) \
SEQ_MK_EVENT(sysex, 0x94, .device=(_dev), \
.buffer={0xff, 0xff, 0xff, 0xff, 0xff, 0xff, _args})
#endif /* c99 vs. gcc 2.95.3 */
#if 0
#include <fcntl.h>
#include <stdio.h>
int
main(int argc, char **argv)
{
int i;
int fd;
seq_event_t e;
/* simple usage example (add a buffer to reduce syscall overhead) */
fd = open("/dev/music", O_RDWR);
write(fd, &SEQ_MK_TIMING(START), sizeof (seq_event_t));
read(fd, &e, sizeof e);
switch ( e.tag ) {
case SEQ_CHN_VOICE:
switch ( e.voice.op ) {
case MIDI_NOTEON:
printf("Note on, dev=%d chn=%d key=%d vel=%d\n",
e.c_NOTEON.device, e.c_NOTEON.channel,
e.c_NOTEON.key, e.c_NOTEON.velocity);
}
}
/* all the macros: */
e = SEQ_MK_TIMING(START);
e = SEQ_MK_TIMING(STOP);
e = SEQ_MK_TIMING(CONTINUE);
/*
* Wait until the specified number of divisions from the timer start
* (abs) or the preceding event (rel). The number of divisions to a
* beat or to a MIDI clock is determined by the timebase (set by
* ioctl). The tempo is expressed in beats per minute, where a beat
* is always 24 MIDI clocks (and usually equated to a quarter note,
* but that can be changed with timesig)--that is, tempo is
* (MIDI clocks per minute)/24. The timebase is the number of divisions
* in a beat--that is, the number of divisions that make up 24 MIDI
* clocks--so the timebase is 24*(divisions per MIDI clock). The MThd
* header in a SMF gives the 'natural' timebase for the file; if the
* timebase is set accordingly, then the delay values appearing in the
* tracks are in terms of divisions, and can be used as WAIT_REL
* arguments without modification.
*/
e = SEQ_MK_TIMING(WAIT_ABS, .divisions=192);
e = SEQ_MK_TIMING(WAIT_REL, .divisions=192);
/*
* The 'beat' in bpm is 24 MIDI clocks (usually a quarter note but
* changeable with timesig).
*/
e = SEQ_MK_TIMING(TEMPO, .bpm=84);
/*
* An ECHO event on output appears on input at the appointed time; the
* cookie can be anything of interest to the application. Can be used
* in schemes to get some control over latency.
*/
e = SEQ_MK_TIMING(ECHO, .cookie=0xfeedface);
/*
* A midibeat is smaller than a beat. It is six MIDI clocks, or a fourth
* of a beat, or a sixteenth note if the beat is a quarter. SPP is a
* request to position at the requested midibeat from the start of the
* sequence. [sequencer does not at present implement SPP]
*/
e = SEQ_MK_TIMING(SPP, .midibeat=128);
/*
* numerator and lg2denom describe the time signature as it would
* appear on a staff, where lg2denom of 0,1,2,3... corresponds to
* denominator of 1,2,4,8... respectively. So the example below
* corresponds to 4/4. dsq_per_24clks defines the relationship of
* MIDI clocks to note values, by specifying the number of
* demisemiquavers (32nd notes) represented by 24 MIDI clocks.
* The default is 8 demisemiquavers, or a quarter note.
* clks_per_click can configure a metronome (for example, the MPU401
* had such a feature in intelligent mode) to click every so many
* MIDI clocks. The 24 in this example would give a click every quarter
* note. [sequencer does not at present implement TIMESIG]
*/
e = SEQ_MK_TIMING(TIMESIG, .numerator=4, .lg2denom=2,
.clks_per_click=24, .dsq_per_24clks=8);
/*
* This example declares 6/8 time where the beat (24 clocks) is the
* eighth note, but the metronome clicks every dotted quarter (twice
* per measure):
*/
e = SEQ_MK_TIMING(TIMESIG, .numerator=6, .lg2denom=3,
.clks_per_click=72, .dsq_per_24clks=4);
/*
* An alternate declaration for 6/8 where the beat (24 clocks) is now
* the dotted quarter and corresponds to the metronome click:
*/
e = SEQ_MK_TIMING(TIMESIG, .numerator=6, .lg2denom=3,
.clks_per_click=24, .dsq_per_24clks=12);
/*
* It would also be possible to keep the default correspondence of
* 24 clocks to the quarter note (8 dsq), and still click the metronome
* each dotted quarter:
*/
e = SEQ_MK_TIMING(TIMESIG, .numerator=6, .lg2denom=3,
.clks_per_click=36, .dsq_per_24clks=8);
e = SEQ_MK_CHN(NOTEON, .device=1, .channel=0, .key=60, .velocity=64);
e = SEQ_MK_CHN(NOTEOFF, .device=1, .channel=0, .key=60, .velocity=64);
e = SEQ_MK_CHN(KEY_PRESSURE, .device=1, .channel=0, .key=60,
.pressure=64);
/*
* sequencer does not at present implement CTL_CHANGE well. The API
* provides for a 14-bit value where you give the controller index
* of the controller MSB and sequencer will split the 14-bit value to
* the controller MSB and LSB for you--but it doesn't; it ignores the
* high bits of value and writes the low bits whether you have specified
* MSB or LSB. That would not be hard to fix but for the fact that OSS
* itself seems to suffer from the same mixup (and its behavior differs
* with whether the underlying device is an onboard synth or a MIDI
* link!) so there is surely a lot of code that relies on it being
* broken :(.
* (Note: as the OSS developers have ceased development of the
* /dev/music API as of OSS4, it would be possible given a complete
* list of the events defined in OSS4 to add some new ones for native
* use without fear of future conflict, such as a better ctl_change.)
*/
e = SEQ_MK_CHN(CTL_CHANGE, .device=1, .channel=0,
.controller=MIDI_CTRL_EXPRESSION_MSB, .value=8192);/*XX*/
/*
* The way you really have to do it:
*/
e = SEQ_MK_CHN(CTL_CHANGE, .device=1, .channel=0,
.controller=MIDI_CTRL_EXPRESSION_MSB, .value=8192>>7);
e = SEQ_MK_CHN(CTL_CHANGE, .device=1, .channel=0,
.controller=MIDI_CTRL_EXPRESSION_LSB, .value=8192&0x7f);
e = SEQ_MK_CHN(PGM_CHANGE, .device=1, .channel=0, .program=51);
e = SEQ_MK_CHN(CHN_PRESSURE, .device=1, .channel=0, .pressure=64);
e = SEQ_MK_CHN(PITCH_BEND, .device=1, .channel=0, .value=8192);
/*
* A SYSEX event carries up to six bytes of a system exclusive message.
* The first such message must begin with MIDI_SYSEX_START (0xf0), the
* last must end with MIDI_SYSEX_END (0xf7), and only the last may carry
* fewer than 6 bytes. To supply message bytes in the macro, you must
* prefix the first with [0]= as shown. The macro's first argument is
* the device.
*/
e = SEQ_MK_SYSEX(1,[0]=MIDI_SYSEX_START,1,2,MIDI_SYSEX_END);
/*
* In some cases it may be easier to use the macro only to initialize
* the event, and fill in the message bytes later. The code that fills
* in the message does not need to store 0xff following the SYSEX_END.
*/
e = SEQ_MK_SYSEX(1);
for ( i = 0; i < 3; ++ i )
e.sysex.buffer[i] = i;
/*
* It would be nice to think the old /dev/sequencer MIDIPUTC event
* obsolete, but it is still needed (absent any better API) by any MIDI
* file player that will implement the ESCAPED events that may occur in
* SMF. Sorry. Here's how to use it:
*/
e = SEQ_MK_EVENT(putc, SEQOLD_MIDIPUTC, .device=1, .byte=42);
printf("confirm event size: %d (should be 8)\n", sizeof (seq_event_t));
return 0;
}
#endif /* 0 */
#endif /* !_SYS_MIDIIO_H_ */
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