soundcard.h

linux得一些常用命令,以及linux环境下的c编程

#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.
 */

#define	   CTL_BANK_SELECT		0x00
#define	   CTL_MODWHEEL			0x01
#define    CTL_BREATH			0x02
/*		undefined		0x03 */
#define    CTL_FOOT			0x04
#define    CTL_PORTAMENTO_TIME		0x05
#define    CTL_DATA_ENTRY		0x06
#define    CTL_MAIN_VOLUME		0x07
#define    CTL_BALANCE			0x08
/*		undefined		0x09 */
#define    CTL_PAN			0x0a
#define    CTL_EXPRESSION		0x0b
/*		undefined		0x0c */
/*		undefined		0x0d */
/*		undefined		0x0e */
/*		undefined		0x0f */
#define    CTL_GENERAL_PURPOSE1	0x10
#define    CTL_GENERAL_PURPOSE2	0x11
#define    CTL_GENERAL_PURPOSE3	0x12
#define    CTL_GENERAL_PURPOSE4	0x13
/*		undefined		0x14 - 0x1f */

/*		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 */

#define    CTL_GENERAL_PURPOSE5	0x50
#define    CTL_GENERAL_PURPOSE6	0x51
#define    CTL_GENERAL_PURPOSE7	0x52
#define    CTL_GENERAL_PURPOSE8	0x53
/*		undefined		0x54 - 0x5a */
#define    CTL_EXT_EFF_DEPTH		0x5b
#define    CTL_TREMOLO_DEPTH		0x5c
#define    CTL_CHORUS_DEPTH		0x5d
#define    CTL_DETUNE_DEPTH		0x5e
#define    CTL_CELESTE_DEPTH		0x5e	/* Alias for the above one */
#define    CTL_PHASER_DEPTH		0x5f
#define    CTL_DATA_INCREMENT		0x60
#define    CTL_DATA_DECREMENT		0x61
#define    CTL_NONREG_PARM_NUM_LSB	0x62
#define    CTL_NONREG_PARM_NUM_MSB	0x63
#define    CTL_REGIST_PARM_NUM_LSB	0x64
#define    CTL_REGIST_PARM_NUM_MSB	0x65
/*		undefined		0x66 - 0x78 */
/*		reserved		0x79 - 0x7f */

/* Pseudo controllers (not midi compatible) */
#define    CTRL_PITCH_BENDER		255
#define    CTRL_PITCH_BENDER_RANGE	254
#define    CTRL_EXPRESSION		253	/* Obsolete */
#define    CTRL_MAIN_VOLUME		252	/* Obsolete */
#define SEQ_BALANCE		11
#define SEQ_VOLMODE             12

/*
 * Volume mode decides how volumes are used
 */

#define VOL_METHOD_ADAGIO	1
#define VOL_METHOD_LINEAR	2

/*
 * 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
 */

typedef unsigned char sbi_instr_data[32];

struct sbi_instrument {
		unsigned short	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	synth_subtype;
#define FM_TYPE_ADLIB			0x00
#define FM_TYPE_OPL3			0x01
#define MIDI_TYPE_MPU401		0x401

#define SAMPLE_TYPE_BASIC		0x10
#define SAMPLE_TYPE_GUS			SAMPLE_TYPE_BASIC
#define SAMPLE_TYPE_WAVEFRONT           0x11

		int	perc_mode;	/* No longer supported */
		int	nr_voices;
		int	nr_drums;	/* Obsolete field */
		int	instr_bank_size;
		unsigned int	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;
	};

#define MIDI_CAP_MPU401		1		/* MPU-401 intelligent mode */

struct midi_info {
		char		name[30];
		int		device;		/* 0-N. INITIALIZE BEFORE CALLING */
		unsigned int	capabilities;	/* To be defined later */
		int		dev_type;
		int		dummies[18];	/* Reserve space */
	};

/********************************************
 * ioctl commands for the /dev/midi##
 */
typedef struct {
		unsigned char cmd;
		char nr_args, nr_returns;
		unsigned char data[30];
	} mpu_command_rec;

#define SNDCTL_MIDI_PRETIME		_SIOWR('m', 0, int)
#define SNDCTL_MIDI_MPUMODE		_SIOWR('m', 1, int)
#define SNDCTL_MIDI_MPUCMD		_SIOWR('m', 2, mpu_command_rec)

/********************************************
 * IOCTL commands for /dev/dsp and /dev/audio
 */

#define SNDCTL_DSP_RESET		_SIO  ('P', 0)
#define SNDCTL_DSP_SYNC			_SIO  ('P', 1)
#define SNDCTL_DSP_SPEED		_SIOWR('P', 2, int)
#define SNDCTL_DSP_STEREO		_SIOWR('P', 3, int)
#define SNDCTL_DSP_GETBLKSIZE		_SIOWR('P', 4, int)
#define SNDCTL_DSP_SAMPLESIZE		SNDCTL_DSP_SETFMT
#define SNDCTL_DSP_CHANNELS		_SIOWR('P', 6, int)
#define SOUND_PCM_WRITE_CHANNELS	SNDCTL_DSP_CHANNELS
#define SOUND_PCM_WRITE_FILTER		_SIOWR('P', 7, int)
#define SNDCTL_DSP_POST			_SIO  ('P', 8)
#define SNDCTL_DSP_SUBDIVIDE		_SIOWR('P', 9, int)
#define SNDCTL_DSP_SETFRAGMENT		_SIOWR('P',10, int)

/*	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.
 */
typedef struct 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 */


#define SNDCTL_DSP_GETTRIGGER		_SIOR ('P',16, int)
#define SNDCTL_DSP_SETTRIGGER		_SIOW ('P',16, int)
#	define PCM_ENABLE_INPUT		0x00000001
#	define PCM_ENABLE_OUTPUT		0x00000002

typedef struct count_info {
		int bytes;	/* Total # of bytes processed */
		int blocks;	/* # of fragment transitions since last time */
		int ptr;	/* Current DMA pointer value */
	} count_info;

#define SNDCTL_DSP_GETIPTR		_SIOR ('P',17, count_info)
#define SNDCTL_DSP_GETOPTR		_SIOR ('P',18, count_info)

typedef struct buffmem_desc {
		unsigned *buffer;
		int size;
	} buffmem_desc;
#define SNDCTL_DSP_MAPINBUF		_SIOR ('P', 19, buffmem_desc)
#define SNDCTL_DSP_MAPOUTBUF		_SIOR ('P', 20, buffmem_desc)
#define SNDCTL_DSP_SETSYNCRO		_SIO  ('P', 21)
#define SNDCTL_DSP_SETDUPLEX		_SIO  ('P', 22)
#define SNDCTL_DSP_GETODELAY		_SIOR ('P', 23, int)

#define SNDCTL_DSP_GETCHANNELMASK		_SIOWR('P', 64, int)
#define SNDCTL_DSP_BIND_CHANNEL		_SIOWR('P', 65, int)
#	define DSP_BIND_QUERY		0x00000000
#	define DSP_BIND_FRONT		0x00000001
#	define DSP_BIND_SURR		0x00000002
#	define DSP_BIND_CENTER_LFE	0x00000004
#	define DSP_BIND_HANDSET		0x00000008
#	define DSP_BIND_MIC		0x00000010
#	define DSP_BIND_MODEM1		0x00000020
#	define DSP_BIND_MODEM2		0x00000040
#	define DSP_BIND_I2S		0x00000080
#	define DSP_BIND_SPDIF		0x00000100

#define SNDCTL_DSP_SETSPDIF		_SIOW ('P', 66, int)
#define SNDCTL_DSP_GETSPDIF		_SIOR ('P', 67, int)
#	define SPDIF_PRO	0x0001
#	define SPDIF_N_AUD	0x0002
#	define SPDIF_COPY	0x0004
#	define SPDIF_PRE	0x0008
#	define SPDIF_CC		0x07f0
#	define SPDIF_L		0x0800
#	define SPDIF_DRS	0x4000
#	define SPDIF_V		0x8000

/*
 * 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 */