audioio.h
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- /*
- * include/asm-sparc/audioio.h
- *
- * Sparc Audio Midlayer
- * Copyright (C) 1996 Thomas K. Dyas (tdyas@noc.rutgers.edu)
- */
- #ifndef _AUDIOIO_H_
- #define _AUDIOIO_H_
- /*
- * SunOS/Solaris /dev/audio interface
- */
- #if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
- #include <linux/types.h>
- #include <linux/time.h>
- #include <linux/ioctl.h>
- #endif
- /*
- * This structure contains state information for audio device IO streams.
- */
- typedef struct audio_prinfo {
- /*
- * The following values describe the audio data encoding.
- */
- unsigned int sample_rate; /* samples per second */
- unsigned int channels; /* number of interleaved channels */
- unsigned int precision; /* bit-width of each sample */
- unsigned int encoding; /* data encoding method */
- /*
- * The following values control audio device configuration
- */
- unsigned int gain; /* gain level: 0 - 255 */
- unsigned int port; /* selected I/O port (see below) */
- unsigned int avail_ports; /* available I/O ports (see below) */
- unsigned int _xxx[2]; /* Reserved for future use */
- unsigned int buffer_size; /* I/O buffer size */
- /*
- * The following values describe driver state
- */
- unsigned int samples; /* number of samples converted */
- unsigned int eof; /* End Of File counter (play only) */
- unsigned char pause; /* non-zero for pause, zero to resume */
- unsigned char error; /* non-zero if overflow/underflow */
- unsigned char waiting; /* non-zero if a process wants access */
- unsigned char balance; /* stereo channel balance */
- unsigned short minordev;
- /*
- * The following values are read-only state flags
- */
- unsigned char open; /* non-zero if open access permitted */
- unsigned char active; /* non-zero if I/O is active */
- } audio_prinfo_t;
- /*
- * This structure describes the current state of the audio device.
- */
- typedef struct audio_info {
- /*
- * Per-stream information
- */
- audio_prinfo_t play; /* output status information */
- audio_prinfo_t record; /* input status information */
- /*
- * Per-unit/channel information
- */
- unsigned int monitor_gain; /* input to output mix: 0 - 255 */
- unsigned char output_muted; /* non-zero if output is muted */
- unsigned char _xxx[3]; /* Reserved for future use */
- unsigned int _yyy[3]; /* Reserved for future use */
- } audio_info_t;
- /*
- * Audio encoding types
- */
- #define AUDIO_ENCODING_NONE (0) /* no encoding assigned */
- #define AUDIO_ENCODING_ULAW (1) /* u-law encoding */
- #define AUDIO_ENCODING_ALAW (2) /* A-law encoding */
- #define AUDIO_ENCODING_LINEAR (3) /* Linear PCM encoding */
- #define AUDIO_ENCODING_FLOAT (4) /* IEEE float (-1. <-> +1.) */
- #define AUDIO_ENCODING_DVI (104) /* DVI ADPCM */
- #define AUDIO_ENCODING_LINEAR8 (105) /* 8 bit UNSIGNED */
- #define AUDIO_ENCODING_LINEARLE (106) /* Linear PCM LE encoding */
- /*
- * These ranges apply to record, play, and monitor gain values
- */
- #define AUDIO_MIN_GAIN (0) /* minimum gain value */
- #define AUDIO_MAX_GAIN (255) /* maximum gain value */
- /*
- * These values apply to the balance field to adjust channel gain values
- */
- #define AUDIO_LEFT_BALANCE (0) /* left channel only */
- #define AUDIO_MID_BALANCE (32) /* equal left/right channel */
- #define AUDIO_RIGHT_BALANCE (64) /* right channel only */
- #define AUDIO_BALANCE_SHIFT (3)
- /*
- * Generic minimum/maximum limits for number of channels, both modes
- */
- #define AUDIO_MIN_PLAY_CHANNELS (1)
- #define AUDIO_MAX_PLAY_CHANNELS (4)
- #define AUDIO_MIN_REC_CHANNELS (1)
- #define AUDIO_MAX_REC_CHANNELS (4)
- /*
- * Generic minimum/maximum limits for sample precision
- */
- #define AUDIO_MIN_PLAY_PRECISION (8)
- #define AUDIO_MAX_PLAY_PRECISION (32)
- #define AUDIO_MIN_REC_PRECISION (8)
- #define AUDIO_MAX_REC_PRECISION (32)
- /*
- * Define some convenient names for typical audio ports
- */
- /*
- * output ports (several may be enabled simultaneously)
- */
- #define AUDIO_SPEAKER 0x01 /* output to built-in speaker */
- #define AUDIO_HEADPHONE 0x02 /* output to headphone jack */
- #define AUDIO_LINE_OUT 0x04 /* output to line out */
- /*
- * input ports (usually only one at a time)
- */
- #define AUDIO_MICROPHONE 0x01 /* input from microphone */
- #define AUDIO_LINE_IN 0x02 /* input from line in */
- #define AUDIO_CD 0x04 /* input from on-board CD inputs */
- #define AUDIO_INTERNAL_CD_IN AUDIO_CD /* input from internal CDROM */
- #define AUDIO_ANALOG_LOOPBACK 0x40 /* input from output */
- /*
- * This macro initializes an audio_info structure to 'harmless' values.
- * Note that (~0) might not be a harmless value for a flag that was
- * a signed int.
- */
- #define AUDIO_INITINFO(i) {
- unsigned int *__x__;
- for (__x__ = (unsigned int *)(i);
- (char *) __x__ < (((char *)(i)) + sizeof (audio_info_t));
- *__x__++ = ~0);
- }
- /*
- * These allow testing for what the user wants to set
- */
- #define AUD_INITVALUE (~0)
- #define Modify(X) ((unsigned int)(X) != AUD_INITVALUE)
- #define Modifys(X) ((X) != (unsigned short)AUD_INITVALUE)
- #define Modifyc(X) ((X) != (unsigned char)AUD_INITVALUE)
- /*
- * Parameter for the AUDIO_GETDEV ioctl to determine current
- * audio devices.
- */
- #define MAX_AUDIO_DEV_LEN (16)
- typedef struct audio_device {
- char name[MAX_AUDIO_DEV_LEN];
- char version[MAX_AUDIO_DEV_LEN];
- char config[MAX_AUDIO_DEV_LEN];
- } audio_device_t;
- /*
- * Ioctl calls for the audio device.
- */
- /*
- * AUDIO_GETINFO retrieves the current state of the audio device.
- *
- * AUDIO_SETINFO copies all fields of the audio_info structure whose
- * values are not set to the initialized value (-1) to the device state.
- * It performs an implicit AUDIO_GETINFO to return the new state of the
- * device. Note that the record.samples and play.samples fields are set
- * to the last value before the AUDIO_SETINFO took effect. This allows
- * an application to reset the counters while atomically retrieving the
- * last value.
- *
- * AUDIO_DRAIN suspends the calling process until the write buffers are
- * empty.
- *
- * AUDIO_GETDEV returns a structure of type audio_device_t which contains
- * three strings. The string "name" is a short identifying string (for
- * example, the SBus Fcode name string), the string "version" identifies
- * the current version of the device, and the "config" string identifies
- * the specific configuration of the audio stream. All fields are
- * device-dependent -- see the device specific manual pages for details.
- *
- * AUDIO_GETDEV_SUNOS returns a number which is an audio device defined
- * herein (making it not too portable)
- *
- * AUDIO_FLUSH stops all playback and recording, clears all queued buffers,
- * resets error counters, and restarts recording and playback as appropriate
- * for the current sampling mode.
- */
- #define AUDIO_GETINFO _IOR('A', 1, audio_info_t)
- #define AUDIO_SETINFO _IOWR('A', 2, audio_info_t)
- #define AUDIO_DRAIN _IO('A', 3)
- #define AUDIO_GETDEV _IOR('A', 4, audio_device_t)
- #define AUDIO_GETDEV_SUNOS _IOR('A', 4, int)
- #define AUDIO_FLUSH _IO('A', 5)
- /* Define possible audio hardware configurations for
- * old SunOS-style AUDIO_GETDEV ioctl */
- #define AUDIO_DEV_UNKNOWN (0) /* not defined */
- #define AUDIO_DEV_AMD (1) /* audioamd device */
- #define AUDIO_DEV_SPEAKERBOX (2) /* dbri device with speakerbox */
- #define AUDIO_DEV_CODEC (3) /* dbri device (internal speaker) */
- #define AUDIO_DEV_CS4231 (5) /* cs4231 device */
- /*
- * The following ioctl sets the audio device into an internal loopback mode,
- * if the hardware supports this. The argument is TRUE to set loopback,
- * FALSE to reset to normal operation. If the hardware does not support
- * internal loopback, the ioctl should fail with EINVAL.
- * Causes ADC data to be digitally mixed in and sent to the DAC.
- */
- #define AUDIO_DIAG_LOOPBACK _IOW('A', 101, int)
- /*
- * Linux kernel internal implementation.
- */
- #ifdef __KERNEL__
- #include <linux/fs.h>
- #include <linux/tqueue.h>
- #include <linux/wait.h>
- #define SDF_OPEN_WRITE 0x00000001
- #define SDF_OPEN_READ 0x00000002
- struct sparcaudio_ringbuffer
- {
- __u8 *rb_start, *rb_end; /* start, end of this memory buffer */
- __u8 *rb_in, *rb_out; /* input, output pointers */
- int rb_fragsize; /* size of an audio frag */
- int rb_numfrags; /* number of frags */
- int rb_count, rb_hiwat, rb_lowat; /* bytes in use, hi/lo wat points */
- int rb_bufsize; /* total size of buffer */
- };
- struct sparcaudio_driver
- {
- const char * name;
- struct sparcaudio_operations *ops;
- void *private;
- unsigned long flags;
- struct strevent *sd_siglist;
- /* duplex: 0=simplex, 1=duplex, 2=loop */
- int sd_sigflags, duplex;
- /* Which audio device are we? */
- int index;
- /* This device */
- struct sbus_dev *dev;
- /* Processes blocked on open() sit here. */
- wait_queue_head_t open_wait;
- /* Task queue for this driver's bottom half. */
- struct tq_struct tqueue;
- /* Start of ring buffer support */
- __u8 *input_buffer, *output_buffer;
- /* Support for a circular queue of output buffers. */
- __u8 **output_buffers;
- size_t *output_sizes, output_size, output_buffer_size;
- int num_output_buffers, output_front, output_rear, output_offset;
- int output_count, output_active, playing_count, output_eof;
- wait_queue_head_t output_write_wait, output_drain_wait;
- char *output_notify;
- /* Support for a circular queue of input buffers. */
- __u8 **input_buffers;
- size_t *input_sizes, input_size, input_buffer_size;
- int num_input_buffers, input_front, input_rear, input_offset;
- int input_count, input_active, recording_count;
- wait_queue_head_t input_read_wait;
- /* Hack to make it look like we support variable size buffers. */
- int buffer_size;
- int mixer_modify_counter;
- };
- struct sparcaudio_operations
- {
- int (*open)(struct inode *, struct file *, struct sparcaudio_driver *);
- void (*release)(struct inode *, struct file *, struct sparcaudio_driver *);
- int (*ioctl)(struct inode *, struct file *, unsigned int, unsigned long,
- struct sparcaudio_driver *);
- /* Ask driver to begin playing a buffer. */
- void (*start_output)(struct sparcaudio_driver *, __u8 *, unsigned long);
- /* Ask driver to stop playing a buffer. */
- void (*stop_output)(struct sparcaudio_driver *);
- /* Ask driver to begin recording into a buffer. */
- void (*start_input)(struct sparcaudio_driver *, __u8 *, unsigned long);
- /* Ask driver to stop recording. */
- void (*stop_input)(struct sparcaudio_driver *);
- /* Return driver name/version to caller. (/dev/audio specific) */
- void (*sunaudio_getdev)(struct sparcaudio_driver *, audio_device_t *);
- /* Get and set the output volume. (0-255) */
- int (*set_output_volume)(struct sparcaudio_driver *, int);
- int (*get_output_volume)(struct sparcaudio_driver *);
- /* Get and set the input volume. (0-255) */
- int (*set_input_volume)(struct sparcaudio_driver *, int);
- int (*get_input_volume)(struct sparcaudio_driver *);
- /* Get and set the monitor volume. (0-255) */
- int (*set_monitor_volume)(struct sparcaudio_driver *, int);
- int (*get_monitor_volume)(struct sparcaudio_driver *);
- /* Get and set the output balance. (0-64) */
- int (*set_output_balance)(struct sparcaudio_driver *, int);
- int (*get_output_balance)(struct sparcaudio_driver *);
- /* Get and set the input balance. (0-64) */
- int (*set_input_balance)(struct sparcaudio_driver *, int);
- int (*get_input_balance)(struct sparcaudio_driver *);
- /* Get and set the output channels. (1-4) */
- int (*set_output_channels)(struct sparcaudio_driver *, int);
- int (*get_output_channels)(struct sparcaudio_driver *);
- /* Get and set the input channels. (1-4) */
- int (*set_input_channels)(struct sparcaudio_driver *, int);
- int (*get_input_channels)(struct sparcaudio_driver *);
- /* Get and set the output precision. (8-32) */
- int (*set_output_precision)(struct sparcaudio_driver *, int);
- int (*get_output_precision)(struct sparcaudio_driver *);
- /* Get and set the input precision. (8-32) */
- int (*set_input_precision)(struct sparcaudio_driver *, int);
- int (*get_input_precision)(struct sparcaudio_driver *);
- /* Get and set the output port. () */
- int (*set_output_port)(struct sparcaudio_driver *, int);
- int (*get_output_port)(struct sparcaudio_driver *);
- /* Get and set the input port. () */
- int (*set_input_port)(struct sparcaudio_driver *, int);
- int (*get_input_port)(struct sparcaudio_driver *);
- /* Get and set the output encoding. () */
- int (*set_output_encoding)(struct sparcaudio_driver *, int);
- int (*get_output_encoding)(struct sparcaudio_driver *);
- /* Get and set the input encoding. () */
- int (*set_input_encoding)(struct sparcaudio_driver *, int);
- int (*get_input_encoding)(struct sparcaudio_driver *);
- /* Get and set the output rate. () */
- int (*set_output_rate)(struct sparcaudio_driver *, int);
- int (*get_output_rate)(struct sparcaudio_driver *);
- /* Get and set the input rate. () */
- int (*set_input_rate)(struct sparcaudio_driver *, int);
- int (*get_input_rate)(struct sparcaudio_driver *);
- /* Return driver number to caller. (SunOS /dev/audio specific) */
- int (*sunaudio_getdev_sunos)(struct sparcaudio_driver *);
- /* Get available ports */
- int (*get_output_ports)(struct sparcaudio_driver *);
- int (*get_input_ports)(struct sparcaudio_driver *);
- /* Get and set output mute */
- int (*set_output_muted)(struct sparcaudio_driver *, int);
- int (*get_output_muted)(struct sparcaudio_driver *);
- /* Get and set output pause */
- int (*set_output_pause)(struct sparcaudio_driver *, int);
- int (*get_output_pause)(struct sparcaudio_driver *);
- /* Get and set input pause */
- int (*set_input_pause)(struct sparcaudio_driver *, int);
- int (*get_input_pause)(struct sparcaudio_driver *);
- /* Get and set output samples */
- int (*set_output_samples)(struct sparcaudio_driver *, int);
- int (*get_output_samples)(struct sparcaudio_driver *);
- /* Get and set input samples */
- int (*set_input_samples)(struct sparcaudio_driver *, int);
- int (*get_input_samples)(struct sparcaudio_driver *);
- /* Get and set output error */
- int (*set_output_error)(struct sparcaudio_driver *, int);
- int (*get_output_error)(struct sparcaudio_driver *);
- /* Get and set input error */
- int (*set_input_error)(struct sparcaudio_driver *, int);
- int (*get_input_error)(struct sparcaudio_driver *);
- /* Get supported encodings */
- int (*get_formats)(struct sparcaudio_driver *);
- };
- extern int register_sparcaudio_driver(struct sparcaudio_driver *, int);
- extern int unregister_sparcaudio_driver(struct sparcaudio_driver *, int);
- extern void sparcaudio_output_done(struct sparcaudio_driver *, int);
- extern void sparcaudio_input_done(struct sparcaudio_driver *, int);
- #endif
- /* Device minor numbers */
- #define SPARCAUDIO_MIXER_MINOR 0
- /* No sequencer (1) */
- /* No midi (2) */
- #define SPARCAUDIO_DSP_MINOR 3
- #define SPARCAUDIO_AUDIO_MINOR 4
- #define SPARCAUDIO_DSP16_MINOR 5
- #define SPARCAUDIO_STATUS_MINOR 6
- #define SPARCAUDIO_AUDIOCTL_MINOR 7
- /* No sequencer l2 (8) */
- /* No sound processor (9) */
- /* allocate 2^SPARCAUDIO_DEVICE_SHIFT minors per audio device */
- #define SPARCAUDIO_DEVICE_SHIFT 4
- /* With the coming of dummy devices this should perhaps be as high as 5? */
- #define SPARCAUDIO_MAX_DEVICES 3
- /* Streams crap for realaudio */
- typedef
- struct strevent {
- struct strevent *se_next; /* next event for this stream or NULL*/
- struct strevent *se_prev; /* previous event for this stream or last
- * event if this is the first one*/
- pid_t se_pid; /* process to be signaled */
- short se_evs; /* events wanted */
- } strevent_t;
- typedef
- struct stdata
- {
- struct stdata *sd_next ; /* all stdatas are linked together */
- struct stdata *sd_prev ;
- struct strevent *sd_siglist; /* processes to be sent SIGPOLL */
- int sd_sigflags; /* logical OR of all siglist events */
- } stdata_t;
- #define I_NREAD _IOR('S',01, int)
- #define I_NREAD_SOLARIS (('S'<<8)|1)
- #define I_FLUSH _IO('S',05)
- #define I_FLUSH_SOLARIS (('S'<<8)|5)
- #define FLUSHR 1 /* flush read queue */
- #define FLUSHW 2 /* flush write queue */
- #define FLUSHRW 3 /* flush both queues */
- #define I_SETSIG _IO('S',011)
- #define I_SETSIG_SOLARIS (('S'<<8)|11)
- #define S_INPUT 0x01
- #define S_HIPRI 0x02
- #define S_OUTPUT 0x04
- #define S_MSG 0x08
- #define S_ERROR 0x0010
- #define S_HANGUP 0x0020
- #define S_RDNORM 0x0040
- #define S_WRNORM S_OUTPUT
- #define S_RDBAND 0x0080
- #define S_WRBAND 0x0100
- #define S_BANDURG 0x0200
- #define S_ALL 0x03FF
- #define I_GETSIG _IOR('S',012,int)
- #define I_GETSIG_SOLARIS (('S'<<8)|12)
- /* Conversion between Sun and OSS volume settings */
- static __inline__
- int OSS_LEFT(int value)
- {
- return ((value & 0xff) % 101);
- }
- static __inline__
- int OSS_RIGHT(int value)
- {
- return (((value >> 8) & 0xff) % 101);
- }
- static __inline__
- int O_TO_S(int value)
- {
- return value * 255 / 100;
- }
- static __inline__
- int S_TO_O(int value)
- {
- return value * 100 / 255;
- }
- static __inline__
- int OSS_TO_GAIN(int value)
- {
- int l = O_TO_S(OSS_LEFT(value));
- int r = O_TO_S(OSS_RIGHT(value));
- return ((l > r) ? l : r);
- }
- static __inline__
- int OSS_TO_LGAIN(int value)
- {
- int l = O_TO_S(OSS_LEFT(value));
- int r = O_TO_S(OSS_RIGHT(value));
- return ((l < r) ? l : r);
- }
- static __inline__
- int OSS_TO_BAL(int value)
- {
- if (!OSS_TO_GAIN(value))
- return AUDIO_MID_BALANCE;
- if (!OSS_TO_LGAIN(value)) {
- if (OSS_TO_GAIN(value) == OSS_TO_GAIN(OSS_RIGHT(value)))
- return AUDIO_RIGHT_BALANCE;
- else
- return AUDIO_LEFT_BALANCE;
- }
- if (OSS_TO_GAIN(value) == OSS_TO_GAIN(OSS_RIGHT(value)))
- return ((OSS_TO_GAIN(value) - OSS_TO_LGAIN(value)) >> AUDIO_BALANCE_SHIFT)
- + AUDIO_MID_BALANCE;
- else
- return AUDIO_MID_BALANCE - ((OSS_TO_GAIN(value) - OSS_TO_LGAIN(value))
- >> AUDIO_BALANCE_SHIFT);
- }
- static __inline__
- int BAL_TO_OSS(int value, unsigned char balance)
- {
- int l, r, adj;
- if (balance > 63) balance = 63;
- if (balance < AUDIO_MID_BALANCE) {
- l = (int)value * 100 / 255 + ((value * 100 % 255) > 0);
- adj = ((AUDIO_MID_BALANCE - balance) << AUDIO_BALANCE_SHIFT);
- if (adj < value)
- r = (int)(value - adj)
- * 100 / 255;
- else r = 0;
- } else if (balance > AUDIO_MID_BALANCE) {
- r = (int)value * 100 / 255 + ((value * 100 % 255) > 0);
- adj = ((balance - AUDIO_MID_BALANCE) << AUDIO_BALANCE_SHIFT);
- if (adj < value)
- l = (int)(value - adj)
- * 100 / 255;
- else l = 0;
- } else {
- l = r = (int)value * 100 / 255 + ((value * 100 % 255) > 0);
- }
- return ((r << 8) + l);
- }
- #ifdef __KERNEL__
- /* OSS mixer ioctl port handling */
- static __inline__
- int OSS_PORT_AUDIO(struct sparcaudio_driver *drv, unsigned int set)
- {
- int p;
- if (drv->ops->get_output_port) {
- p = drv->ops->get_output_port(drv);
- if (p & set)
- return 0x6464;
- }
- return 0;
- }
- static __inline__
- int OSS_IPORT_AUDIO(struct sparcaudio_driver *drv, unsigned int set)
- {
- int p;
- if (drv->ops->get_input_port) {
- p = drv->ops->get_input_port(drv);
- if (p & set)
- return 0x6464;
- }
- return 0;
- }
- static __inline__
- void OSS_TWIDDLE_PORT(struct sparcaudio_driver *drv, unsigned int ioctl,
- unsigned int port, unsigned int set, unsigned int value)
- {
- if (ioctl == port) {
- int p;
- if (drv->ops->get_output_port && drv->ops->set_output_port) {
- p = drv->ops->get_output_port(drv);
- if ((value == 0) || ((p & set) && (OSS_LEFT(value) < 100)))
- drv->ops->set_output_port(drv, p & ~(set));
- else
- drv->ops->set_output_port(drv, p | set);
- }
- }
- }
- static __inline__
- void OSS_TWIDDLE_IPORT(struct sparcaudio_driver *drv, unsigned int ioctl,
- unsigned int port, unsigned int set, unsigned int value)
- {
- if (ioctl == port) {
- int p;
- if (drv->ops->get_input_port && drv->ops->set_input_port) {
- p = drv->ops->get_input_port(drv);
- if ((value == 0) || ((p & set) && (OSS_LEFT(value) < 100)))
- drv->ops->set_input_port(drv, p & ~(set));
- else
- drv->ops->set_input_port(drv, p | set);
- }
- }
- }
- #endif /* __KERNEL__ */
- #endif /* _AUDIOIO_H_ */