aboutsummaryrefslogtreecommitdiff
path: root/include/asm-sparc64/audioio.h
blob: cf16173f521b00a026c3a4eceb8f243fb1ab52fa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
/*
 * 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)

#endif /* _AUDIOIO_H_ */