/* * Copyright by Hannu Savolainen 1993-1997 * * 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 AUTHOR 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 AUTHOR 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 _UAPISOUNDCARD_H #define _UAPISOUNDCARD_H
/* * OSS interface version. With versions earlier than 3.6 this value is * an integer with value less than 361. In versions 3.6 and later * it's a six digit hexadecimal value. For example value * of 0x030600 represents OSS version 3.6.0. * Use ioctl(fd, OSS_GETVERSION, &int) to get the version number of * the currently active driver.
*/ #define SOUND_VERSION 0x030802 #define OPEN_SOUND_SYSTEM
/* In Linux we need to be prepared for cross compiling */ #include <linux/ioctl.h>
/* Endian macros. */ #ifndef __KERNEL__ # include <endian.h> #endif
/* * Supported card ID numbers (Should be somewhere else?)
*/
/* Ioctl's have the command encoded in the lower word, * and the size of any in or out parameters in the upper * word. The high 2 bits of the upper word are used * to encode the in/out status of the parameter; for now * we restrict parameters to at most 8191 bytes.
*/ /* #define SIOCTYPE (0xff<<8) */ #define SIOCPARM_MASK 0x1fff /* parameters must be < 8192 bytes */ #define SIOC_VOID 0x00000000 /* no parameters */ #define SIOC_OUT 0x20000000 /* copy out parameters */ #define SIOC_IN 0x40000000 /* copy in parameters */ #define SIOC_INOUT (SIOC_IN|SIOC_OUT) /* the 0x20000000 is so we can distinguish new ioctl's from old */ #define _SIO(x,y) ((int)(SIOC_VOID|(x<<8)|y)) #define _SIOR(x,y,t) ((int)(SIOC_OUT|((sizeof(t)&SIOCPARM_MASK)<<16)|(x<<8)|y)) #define _SIOW(x,y,t) ((int)(SIOC_IN|((sizeof(t)&SIOCPARM_MASK)<<16)|(x<<8)|y)) /* this should be _SIORW, but stdio got there first */ #define _SIOWR(x,y,t) ((int)(SIOC_INOUT|((sizeof(t)&SIOCPARM_MASK)<<16)|(x<<8)|y)) #define _SIOC_SIZE(x) ((x>>16)&SIOCPARM_MASK) #define _SIOC_DIR(x) (x & 0xf0000000) #define _SIOC_NONE SIOC_VOID #define _SIOC_READ SIOC_OUT #define _SIOC_WRITE SIOC_IN # endif /* _IOWR */ #endif/* !_SIOWR */
/* * Sample loading mechanism for internal synthesizers (/dev/sequencer) * The following patch_info structure has been designed to support * Gravis UltraSound. It tries to be universal format for uploading * sample based patches but is probably too limited. * * (PBD) As Hannu guessed, the GUS structure is too limited for * the WaveFront, but this is the right place for a constant definition.
*/
struct patch_info { unsignedshort key; /* Use WAVE_PATCH here */ #define WAVE_PATCH _PATCHKEY(0x04) #define GUS_PATCH WAVE_PATCH #define WAVEFRONT_PATCH _PATCHKEY(0x06)
short device_no; /* Synthesizer number */ short instr_no; /* Midi pgm# */
unsignedint mode; /* * The least significant byte has the same format than the GUS .PAT * files
*/ #define WAVE_16_BITS 0x01 /* bit 0 = 8 or 16 bit wave data. */ #define WAVE_UNSIGNED 0x02 /* bit 1 = Signed - Unsigned data. */ #define WAVE_LOOPING 0x04 /* bit 2 = looping enabled-1. */ #define WAVE_BIDIR_LOOP 0x08 /* bit 3 = Set is bidirectional looping. */ #define WAVE_LOOP_BACK 0x10 /* bit 4 = Set is looping backward. */ #define WAVE_SUSTAIN_ON 0x20 /* bit 5 = Turn sustaining on. (Env. pts. 3)*/ #define WAVE_ENVELOPES 0x40 /* bit 6 = Enable envelopes - 1 */ #define WAVE_FAST_RELEASE 0x80 /* bit 7 = Shut off immediately after note off */ /* (use the env_rate/env_offs fields). */ /* Linux specific bits */ #define WAVE_VIBRATO 0x00010000 /* The vibrato info is valid */ #define WAVE_TREMOLO 0x00020000 /* The tremolo info is valid */ #define WAVE_SCALE 0x00040000 /* The scaling info is valid */ #define WAVE_FRACTIONS 0x00080000 /* Fraction information is valid */ /* Reserved bits */ #define WAVE_ROM 0x40000000 /* For future use */ #define WAVE_MULAW 0x20000000 /* For future use */ /* Other bits must be zeroed */
int len; /* Size of the wave data in bytes */ int loop_start, loop_end; /* Byte offsets from the beginning */
/* * The base_freq and base_note fields are used when computing the * playback speed for a note. The base_note defines the tone frequency * which is heard if the sample is played using the base_freq as the * playback speed. * * The low_note and high_note fields define the minimum and maximum note * frequencies for which this sample is valid. It is possible to define * more than one samples for an instrument number at the same time. The * low_note and high_note fields are used to select the most suitable one. * * The fields base_note, high_note and low_note should contain * the note frequency multiplied by 1000. For example value for the * middle A is 440*1000.
*/
unsignedint base_freq; unsignedint base_note; unsignedint high_note; unsignedint low_note; int panning; /* -128=left, 127=right */ int detuning;
int scale_frequency; unsignedint scale_factor; /* from 0 to 2048 or 0 to 2 */
int volume; int fractions; int reserved1; int spare[2]; char data[1]; /* The waveform data starts here */
};
struct sysex_info { short key; /* Use SYSEX_PATCH or MAUI_PATCH here */ #define SYSEX_PATCH _PATCHKEY(0x05) #define MAUI_PATCH _PATCHKEY(0x06) short device_no; /* Synthesizer number */ int len; /* Size of the sysex data in bytes */ unsignedchar data[1]; /* Sysex data starts here */
};
/* * /dev/sequencer input events. * * The data written to the /dev/sequencer is a stream of events. Events * are records of 4 or 8 bytes. The first byte defines the size. * Any number of events can be written with a write call. There * is a set of macros for sending these events. Use these macros if you * want to maximize portability of your program. * * Events SEQ_WAIT, SEQ_MIDIPUTC and SEQ_ECHO. Are also input events. * (All input events are currently 4 bytes long. Be prepared to support * 8 byte events also. If you receive any event having first byte >= 128, * it's a 8 byte event. * * The events are documented at the end of this file. * * Normal events (4 bytes) * There is also a 8 byte version of most of the 4 byte events. The * 8 byte one is recommended.
*/ #define SEQ_NOTEOFF 0 #define SEQ_FMNOTEOFF SEQ_NOTEOFF /* Just old name */ #define SEQ_NOTEON 1 #define SEQ_FMNOTEON SEQ_NOTEON #define SEQ_WAIT TMR_WAIT_ABS #define SEQ_PGMCHANGE 3 #define SEQ_FMPGMCHANGE SEQ_PGMCHANGE #define SEQ_SYNCTIMER TMR_START #define SEQ_MIDIPUTC 5 #define SEQ_DRUMON 6 /*** OBSOLETE ***/ #define SEQ_DRUMOFF 7 /*** OBSOLETE ***/ #define SEQ_ECHO TMR_ECHO /* For synching programs with output */ #define SEQ_AFTERTOUCH 9 #define SEQ_CONTROLLER 10
/******************************************* * Midi controller numbers ******************************************* * Controllers 0 to 31 (0x00 to 0x1f) and * 32 to 63 (0x20 to 0x3f) are continuous * controllers. * In the MIDI 1.0 these controllers are sent using * two messages. Controller numbers 0 to 31 are used * to send the MSB and the controller numbers 32 to 63 * are for the LSB. Note that just 7 bits are used in MIDI bytes.
*/
/* undefined 0x20 */ /* The controller numbers 0x21 to 0x3f are reserved for the */ /* least significant bytes of the controllers 0x00 to 0x1f. */ /* These controllers are not recognised by the driver. */
/* Controllers 64 to 69 (0x40 to 0x45) are on/off switches. */ /* 0=OFF and 127=ON (intermediate values are possible) */ #define CTL_DAMPER_PEDAL 0x40 #define CTL_SUSTAIN 0x40 /* Alias */ #define CTL_HOLD 0x40 /* Alias */ #define CTL_PORTAMENTO 0x41 #define CTL_SOSTENUTO 0x42 #define CTL_SOFT_PEDAL 0x43 /* undefined 0x44 */ #define CTL_HOLD2 0x45 /* undefined 0x46 - 0x4f */
/* * Note! SEQ_WAIT, SEQ_MIDIPUTC and SEQ_ECHO are used also as * input events.
*/
/* * Event codes 0xf0 to 0xfc are reserved for future extensions.
*/
#define SEQ_FULLSIZE 0xfd /* Long events */ /* * SEQ_FULLSIZE events are used for loading patches/samples to the * synthesizer devices. These events are passed directly to the driver * of the associated synthesizer device. There is no limit to the size * of the extended events. These events are not queued but executed * immediately when the write() is called (execution can take several * seconds of time). * * When a SEQ_FULLSIZE message is written to the device, it must * be written using exactly one write() call. Other events cannot * be mixed to the same write. * * For FM synths (YM3812/OPL3) use struct sbi_instrument and write it to the * /dev/sequencer. Don't write other data together with the instrument structure * Set the key field of the structure to FM_PATCH. The device field is used to * route the patch to the corresponding device. * * For wave table use struct patch_info. Initialize the key field * to WAVE_PATCH.
*/ #define SEQ_PRIVATE 0xfe /* Low level HW dependent events (8 bytes) */ #define SEQ_EXTENDED 0xff /* Extended events (8 bytes) OBSOLETE */
/* * Record for FM patches
*/
typedefunsignedchar sbi_instr_data[32];
struct sbi_instrument { unsignedshort key; /* FM_PATCH or OPL3_PATCH */ #define FM_PATCH _PATCHKEY(0x01) #define OPL3_PATCH _PATCHKEY(0x03) short device; /* Synth# (0-4) */ int channel; /* Program# to be initialized */
sbi_instr_data operators; /* Register settings for operator cells (.SBI format) */
};
struct synth_info { /* Read only */ char name[30]; int device; /* 0-N. INITIALIZE BEFORE CALLING */ int synth_type; #define SYNTH_TYPE_FM 0 #define SYNTH_TYPE_SAMPLE 1 #define SYNTH_TYPE_MIDI 2 /* Midi interface */
int perc_mode; /* No longer supported */ int nr_voices; int nr_drums; /* Obsolete field */ int instr_bank_size; unsignedint capabilities; #define SYNTH_CAP_PERCMODE 0x00000001 /* No longer used */ #define SYNTH_CAP_OPL3 0x00000002 /* Set if OPL3 supported */ #define SYNTH_CAP_INPUT 0x00000004 /* Input (MIDI) device */ int dummies[19]; /* Reserve space */
};
struct sound_timer_info { char name[32]; int caps;
};
struct midi_info { char name[30]; int device; /* 0-N. INITIALIZE BEFORE CALLING */ unsignedint capabilities; /* To be defined later */ int dev_type; int dummies[18]; /* Reserve space */
};
/******************************************** * ioctl commands for the /dev/midi##
*/ typedefstruct { unsignedchar cmd; char nr_args, nr_returns; unsignedchar data[30];
} mpu_command_rec;
/* Audio data formats (Note! U8=8 and S16_LE=16 for compatibility) */ #define SNDCTL_DSP_GETFMTS _SIOR ('P',11, int) /* Returns a mask */ #define SNDCTL_DSP_SETFMT _SIOWR('P',5, int) /* Selects ONE fmt*/ # define AFMT_QUERY 0x00000000 /* Return current fmt */ # define AFMT_MU_LAW 0x00000001 # define AFMT_A_LAW 0x00000002 # define AFMT_IMA_ADPCM 0x00000004 # define AFMT_U8 0x00000008 # define AFMT_S16_LE 0x00000010 /* Little endian signed 16*/ # define AFMT_S16_BE 0x00000020 /* Big endian signed 16 */ # define AFMT_S8 0x00000040 # define AFMT_U16_LE 0x00000080 /* Little endian U16 */ # define AFMT_U16_BE 0x00000100 /* Big endian U16 */ # define AFMT_MPEG 0x00000200 /* MPEG (2) audio */ # define AFMT_AC3 0x00000400 /* Dolby Digital AC3 */
/* * Buffer status queries.
*/ typedefstruct audio_buf_info { int fragments; /* # of available fragments (partially usend ones not counted) */ int fragstotal; /* Total # of fragments allocated */ int fragsize; /* Size of a fragment in bytes */
int bytes; /* Available space in bytes (includes partially used fragments) */ /* Note! 'bytes' could be more than fragments*fragsize */
} audio_buf_info;
#define SNDCTL_DSP_GETOSPACE _SIOR ('P',12, audio_buf_info) #define SNDCTL_DSP_GETISPACE _SIOR ('P',13, audio_buf_info) #define SNDCTL_DSP_NONBLOCK _SIO ('P',14) #define SNDCTL_DSP_GETCAPS _SIOR ('P',15, int) # define DSP_CAP_REVISION 0x000000ff /* Bits for revision level (0 to 255) */ # define DSP_CAP_DUPLEX 0x00000100 /* Full duplex record/playback */ # define DSP_CAP_REALTIME 0x00000200 /* Real time capability */ # define DSP_CAP_BATCH 0x00000400 /* Device has some kind of */ /* internal buffers which may */ /* cause some delays and */ /* decrease precision of timing */ # define DSP_CAP_COPROC 0x00000800 /* Has a coprocessor */ /* Sometimes it's a DSP */ /* but usually not */ # define DSP_CAP_TRIGGER 0x00001000 /* Supports SETTRIGGER */ # define DSP_CAP_MMAP 0x00002000 /* Supports mmap() */ # define DSP_CAP_MULTI 0x00004000 /* support multiple open */ # define DSP_CAP_BIND 0x00008000 /* channel binding to front/rear/cneter/lfe */
typedefstruct count_info { int bytes; /* Total # of bytes processed */ int blocks; /* # of fragment transitions since last time */ int ptr; /* Current DMA pointer value */
} count_info;
/* * Application's profile defines the way how playback underrun situations should be handled. * * APF_NORMAL (the default) and APF_NETWORK make the driver to cleanup the * playback buffer whenever an underrun occurs. This consumes some time * prevents looping the existing buffer. * APF_CPUINTENS is intended to be set by CPU intensive applications which * are likely to run out of time occasionally. In this mode the buffer cleanup is * disabled which saves CPU time but also let's the previous buffer content to * be played during the "pause" after the underrun.
*/ #define SNDCTL_DSP_PROFILE _SIOW ('P', 23, int) #define APF_NORMAL 0 /* Normal applications */ #define APF_NETWORK 1 /* Underruns probably caused by an "external" delay */ #define APF_CPUINTENS 2 /* Underruns probably caused by "overheating" the CPU */
/* * ioctl calls to be used in communication with coprocessors and * DSP chips.
*/
typedefstruct copr_buffer { int command; /* Set to 0 if not used */ int flags; #define CPF_NONE 0x0000 #define CPF_FIRST 0x0001 /* First block */ #define CPF_LAST 0x0002 /* Last block */ int len; int offs; /* If required by the device (0 if not used) */
unsignedchar data[4000]; /* NOTE! 4000 is not 4k */
} copr_buffer;
typedefstruct copr_debug_buf { int command; /* Used internally. Set to 0 */ int parm1; int parm2; int flags; int len; /* Length of data in bytes */
} copr_debug_buf;
typedefstruct copr_msg { int len; unsignedchar data[4000];
} copr_msg;
/********************************************* * IOCTL commands for /dev/mixer
*/
/* * Mixer devices * * There can be up to 20 different analog mixer channels. The * SOUND_MIXER_NRDEVICES gives the currently supported maximum. * The SOUND_MIXER_READ_DEVMASK returns a bitmask which tells * the devices supported by the particular mixer.
*/
#define SOUND_MIXER_NRDEVICES 25 #define SOUND_MIXER_VOLUME 0 #define SOUND_MIXER_BASS 1 #define SOUND_MIXER_TREBLE 2 #define SOUND_MIXER_SYNTH 3 #define SOUND_MIXER_PCM 4 #define SOUND_MIXER_SPEAKER 5 #define SOUND_MIXER_LINE 6 #define SOUND_MIXER_MIC 7 #define SOUND_MIXER_CD 8 #define SOUND_MIXER_IMIX 9 /* Recording monitor */ #define SOUND_MIXER_ALTPCM 10 #define SOUND_MIXER_RECLEV 11 /* Recording level */ #define SOUND_MIXER_IGAIN 12 /* Input gain */ #define SOUND_MIXER_OGAIN 13 /* Output gain */ /* * The AD1848 codec and compatibles have three line level inputs * (line, aux1 and aux2). Since each card manufacturer have assigned * different meanings to these inputs, it's inpractical to assign * specific meanings (line, cd, synth etc.) to them.
*/ #define SOUND_MIXER_LINE1 14 /* Input source 1 (aux1) */ #define SOUND_MIXER_LINE2 15 /* Input source 2 (aux2) */ #define SOUND_MIXER_LINE3 16 /* Input source 3 (line) */ #define SOUND_MIXER_DIGITAL1 17 /* Digital (input) 1 */ #define SOUND_MIXER_DIGITAL2 18 /* Digital (input) 2 */ #define SOUND_MIXER_DIGITAL3 19 /* Digital (input) 3 */ #define SOUND_MIXER_PHONEIN 20 /* Phone input */ #define SOUND_MIXER_PHONEOUT 21 /* Phone output */ #define SOUND_MIXER_VIDEO 22 /* Video/TV (audio) in */ #define SOUND_MIXER_RADIO 23 /* Radio in */ #define SOUND_MIXER_MONITOR 24 /* Monitor (usually mic) volume */
/* Some on/off settings (SOUND_SPECIAL_MIN - SOUND_SPECIAL_MAX) */ /* Not counted to SOUND_MIXER_NRDEVICES, but use the same number space */ #define SOUND_ONOFF_MIN 28 #define SOUND_ONOFF_MAX 30
/* Note! Number 31 cannot be used since the sign bit is reserved */ #define SOUND_MIXER_NONE 31
/* * The following unsupported macros are no longer functional. * Use SOUND_MIXER_PRIVATE# macros in future.
*/ #define SOUND_MIXER_ENHANCE SOUND_MIXER_NONE #define SOUND_MIXER_MUTE SOUND_MIXER_NONE #define SOUND_MIXER_LOUD SOUND_MIXER_NONE
#define SOUND_MIXER_RECSRC 0xff /* Arg contains a bit for each recording source */ #define SOUND_MIXER_DEVMASK 0xfe /* Arg contains a bit for each supported device */ #define SOUND_MIXER_RECMASK 0xfd /* Arg contains a bit for each supported recording source */ #define SOUND_MIXER_CAPS 0xfc # define SOUND_CAP_EXCL_INPUT 0x00000001 /* Only one recording source at a time */ #define SOUND_MIXER_STEREODEVS 0xfb /* Mixer channels supporting stereo */ #define SOUND_MIXER_OUTSRC 0xfa /* Arg contains a bit for each input source to output */ #define SOUND_MIXER_OUTMASK 0xf9 /* Arg contains a bit for each supported input source to output */
/* * A mechanism for accessing "proprietary" mixer features. This method * permits passing 128 bytes of arbitrary data between a mixer application * and the mixer driver. Interpretation of the record is defined by * the particular mixer driver.
*/ typedefunsignedchar mixer_record[128];
/* * Two ioctls for special souncard function
*/ #define SOUND_MIXER_AGC _SIOWR('M', 103, int) #define SOUND_MIXER_3DSE _SIOWR('M', 104, int)
/* * The SOUND_MIXER_PRIVATE# commands can be redefined by low level drivers. * These features can be used when accessing device specific features.
*/ #define SOUND_MIXER_PRIVATE1 _SIOWR('M', 111, int) #define SOUND_MIXER_PRIVATE2 _SIOWR('M', 112, int) #define SOUND_MIXER_PRIVATE3 _SIOWR('M', 113, int) #define SOUND_MIXER_PRIVATE4 _SIOWR('M', 114, int) #define SOUND_MIXER_PRIVATE5 _SIOWR('M', 115, int)
/* * SOUND_MIXER_GETLEVELS and SOUND_MIXER_SETLEVELS calls can be used * for querying current mixer settings from the driver and for loading * default volume settings _prior_ activating the mixer (loading * doesn't affect current state of the mixer hardware). These calls * are for internal use only.
*/
typedefstruct mixer_vol_table { int num; /* Index to volume table */ char name[32]; int levels[32];
} mixer_vol_table;
/* * An ioctl for identifying the driver version. It will return value * of the SOUND_VERSION macro used when compiling the driver. * This call was introduced in OSS version 3.6 and it will not work * with earlier versions (returns EINVAL).
*/ #define OSS_GETVERSION _SIOR ('M', 118, int)
/* * Level 2 event types for /dev/sequencer
*/
/* * The 4 most significant bits of byte 0 specify the class of * the event: * * 0x8X = system level events, * 0x9X = device/port specific events, event[1] = device/port, * The last 4 bits give the subtype: * 0x02 = Channel event (event[3] = chn). * 0x01 = note event (event[4] = note). * (0x01 is not used alone but always with bit 0x02). * event[2] = MIDI message code (0x80=note off etc.) *
*/
#define EV_SEQ_LOCAL 0x80 #define EV_TIMING 0x81 #define EV_CHN_COMMON 0x92 #define EV_CHN_VOICE 0x93 #define EV_SYSEX 0x94 /* * Event types 200 to 220 are reserved for application use. * These numbers will not be used by the driver.
*/
/* * Timer event types
*/ #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 */
/* * Local event types
*/ #define LOCL_STARTAUDIO 1
#if !defined(__KERNEL__) || defined(USE_SEQ_MACROS) /* * Some convenience macros to simplify programming of the * /dev/sequencer interface * * This is a legacy interface for applications written against * the OSSlib-3.8 style interface. It is no longer possible * to actually link against OSSlib with this header, but we * still provide these macros for programs using them. * * If you want to use OSSlib, it is recommended that you get * the GPL version of OSS-4.x and build against that version * of the header. * * We redefine the extern keyword so that usr/include/headers_check.pl * does not complain about SEQ_USE_EXTBUF.
*/ #define SEQ_DECLAREBUF() SEQ_USE_EXTBUF()
void seqbuf_dump(void); /* This function must be provided by programs */
#define _SEQ_EXTERN extern #define SEQ_USE_EXTBUF() \
_SEQ_EXTERN unsignedchar _seqbuf[]; \
_SEQ_EXTERN int _seqbuflen; _SEQ_EXTERN int _seqbufptr
#ifndef USE_SIMPLE_MACROS /* Sample seqbuf_dump() implementation: * * SEQ_DEFINEBUF (2048); -- Defines a buffer for 2048 bytes * * int seqfd; -- The file descriptor for /dev/sequencer. * * void * seqbuf_dump () * { * if (_seqbufptr) * if (write (seqfd, _seqbuf, _seqbufptr) == -1) * { * perror ("write /dev/sequencer"); * exit (-1); * } * _seqbufptr = 0; * }
*/
#define SEQ_DEFINEBUF(len) unsignedchar _seqbuf[len]; int _seqbuflen = len;int _seqbufptr = 0 #define _SEQ_NEEDBUF(len) if ((_seqbufptr+(len)) > _seqbuflen) seqbuf_dump() #define _SEQ_ADVBUF(len) _seqbufptr += len #define SEQ_DUMPBUF seqbuf_dump #else /* * This variation of the sequencer macros is used just to format one event * using fixed buffer. * * The program using the macro library must define the following macros before * using this library. * * #define _seqbuf name of the buffer (unsigned char[]) * #define _SEQ_ADVBUF(len) If the applic needs to know the exact * size of the event, this macro can be used. * Otherwise this must be defined as empty. * #define _seqbufptr Define the name of index variable or 0 if * not required.
*/ #define _SEQ_NEEDBUF(len) /* empty */ #endif
#define _CHN_COMMON(dev, event, chn, p1, p2, w14) \
{_SEQ_NEEDBUF(8);\
_seqbuf[_seqbufptr] = EV_CHN_COMMON;\
_seqbuf[_seqbufptr+1] = (dev);\
_seqbuf[_seqbufptr+2] = (event);\
_seqbuf[_seqbufptr+3] = (chn);\
_seqbuf[_seqbufptr+4] = (p1);\
_seqbuf[_seqbufptr+5] = (p2);\
*(short *)&_seqbuf[_seqbufptr+6] = (w14);\
_SEQ_ADVBUF(8);} /* * SEQ_SYSEX permits sending of sysex messages. (It may look that it permits * sending any MIDI bytes but it's absolutely not possible. Trying to do * so _will_ cause problems with MPU401 intelligent mode). * * Sysex messages are sent in blocks of 1 to 6 bytes. Longer messages must be * sent by calling SEQ_SYSEX() several times (there must be no other events * between them). First sysex fragment must have 0xf0 in the first byte * and the last byte (buf[len-1] of the last fragment must be 0xf7. No byte * between these sysex start and end markers cannot be larger than 0x7f. Also * lengths of each fragments (except the last one) must be 6. * * Breaking the above rules may work with some MIDI ports but is likely to * cause fatal problems with some other devices (such as MPU401).
*/ #define SEQ_SYSEX(dev, buf, len) \
{int ii, ll=(len); \ unsignedchar *bufp=buf;\ if (ll>6)ll=6;\
_SEQ_NEEDBUF(8);\
_seqbuf[_seqbufptr] = EV_SYSEX;\
_seqbuf[_seqbufptr+1] = (dev);\ for(ii=0;ii<ll;ii++)\
_seqbuf[_seqbufptr+ii+2] = bufp[ii];\ for(ii=ll;ii<6;ii++)\
_seqbuf[_seqbufptr+ii+2] = 0xff;\
_SEQ_ADVBUF(8);}
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