aboutsummaryrefslogtreecommitdiff
path: root/include/uapi/linux/usb/audio.h
blob: a4680a5bf5dd4724aad4d16743543f3f35b52be3 (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
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
/*
 * <linux/usb/audio.h> -- USB Audio definitions.
 *
 * Copyright (C) 2006 Thumtronics Pty Ltd.
 * Developed for Thumtronics by Grey Innovation
 * Ben Williamson <ben.williamson@greyinnovation.com>
 *
 * This software is distributed under the terms of the GNU General Public
 * License ("GPL") version 2, as published by the Free Software Foundation.
 *
 * This file holds USB constants and structures defined
 * by the USB Device Class Definition for Audio Devices.
 * Comments below reference relevant sections of that document:
 *
 * http://www.usb.org/developers/devclass_docs/audio10.pdf
 *
 * Types and defines in this file are either specific to version 1.0 of
 * this standard or common for newer versions.
 */

#ifndef _UAPI__LINUX_USB_AUDIO_H
#define _UAPI__LINUX_USB_AUDIO_H

#include <linux/types.h>

/* bInterfaceProtocol values to denote the version of the standard used */
#define UAC_VERSION_1			0x00
#define UAC_VERSION_2			0x20

/* A.2 Audio Interface Subclass Codes */
#define USB_SUBCLASS_AUDIOCONTROL	0x01
#define USB_SUBCLASS_AUDIOSTREAMING	0x02
#define USB_SUBCLASS_MIDISTREAMING	0x03

/* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */
#define UAC_HEADER			0x01
#define UAC_INPUT_TERMINAL		0x02
#define UAC_OUTPUT_TERMINAL		0x03
#define UAC_MIXER_UNIT			0x04
#define UAC_SELECTOR_UNIT		0x05
#define UAC_FEATURE_UNIT		0x06
#define UAC1_PROCESSING_UNIT		0x07
#define UAC1_EXTENSION_UNIT		0x08

/* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */
#define UAC_AS_GENERAL			0x01
#define UAC_FORMAT_TYPE			0x02
#define UAC_FORMAT_SPECIFIC		0x03

/* A.7 Processing Unit Process Types */
#define UAC_PROCESS_UNDEFINED		0x00
#define UAC_PROCESS_UP_DOWNMIX		0x01
#define UAC_PROCESS_DOLBY_PROLOGIC	0x02
#define UAC_PROCESS_STEREO_EXTENDER	0x03
#define UAC_PROCESS_REVERB		0x04
#define UAC_PROCESS_CHORUS		0x05
#define UAC_PROCESS_DYN_RANGE_COMP	0x06

/* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */
#define UAC_EP_GENERAL			0x01

/* A.9 Audio Class-Specific Request Codes */
#define UAC_SET_			0x00
#define UAC_GET_			0x80

#define UAC__CUR			0x1
#define UAC__MIN			0x2
#define UAC__MAX			0x3
#define UAC__RES			0x4
#define UAC__MEM			0x5

#define UAC_SET_CUR			(UAC_SET_ | UAC__CUR)
#define UAC_GET_CUR			(UAC_GET_ | UAC__CUR)
#define UAC_SET_MIN			(UAC_SET_ | UAC__MIN)
#define UAC_GET_MIN			(UAC_GET_ | UAC__MIN)
#define UAC_SET_MAX			(UAC_SET_ | UAC__MAX)
#define UAC_GET_MAX			(UAC_GET_ | UAC__MAX)
#define UAC_SET_RES			(UAC_SET_ | UAC__RES)
#define UAC_GET_RES			(UAC_GET_ | UAC__RES)
#define UAC_SET_MEM			(UAC_SET_ | UAC__MEM)
#define UAC_GET_MEM			(UAC_GET_ | UAC__MEM)

#define UAC_GET_STAT			0xff

/* A.10 Control Selector Codes */

/* A.10.1 Terminal Control Selectors */
#define UAC_TERM_COPY_PROTECT		0x01

/* A.10.2 Feature Unit Control Selectors */
#define UAC_FU_MUTE			0x01
#define UAC_FU_VOLUME			0x02
#define UAC_FU_BASS			0x03
#define UAC_FU_MID			0x04
#define UAC_FU_TREBLE			0x05
#define UAC_FU_GRAPHIC_EQUALIZER	0x06
#define UAC_FU_AUTOMATIC_GAIN		0x07
#define UAC_FU_DELAY			0x08
#define UAC_FU_BASS_BOOST		0x09
#define UAC_FU_LOUDNESS			0x0a

#define UAC_CONTROL_BIT(CS)	(1 << ((CS) - 1))

/* A.10.3.1 Up/Down-mix Processing Unit Controls Selectors */
#define UAC_UD_ENABLE			0x01
#define UAC_UD_MODE_SELECT		0x02

/* A.10.3.2 Dolby Prologic (tm) Processing Unit Controls Selectors */
#define UAC_DP_ENABLE			0x01
#define UAC_DP_MODE_SELECT		0x02

/* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */
#define UAC_3D_ENABLE			0x01
#define UAC_3D_SPACE			0x02

/* A.10.3.4 Reverberation Processing Unit Control Selectors */
#define UAC_REVERB_ENABLE		0x01
#define UAC_REVERB_LEVEL		0x02
#define UAC_REVERB_TIME			0x03
#define UAC_REVERB_FEEDBACK		0x04

/* A.10.3.5 Chorus Processing Unit Control Selectors */
#define UAC_CHORUS_ENABLE		0x01
#define UAC_CHORUS_LEVEL		0x02
#define UAC_CHORUS_RATE			0x03
#define UAC_CHORUS_DEPTH		0x04

/* A.10.3.6 Dynamic Range Compressor Unit Control Selectors */
#define UAC_DCR_ENABLE			0x01
#define UAC_DCR_RATE			0x02
#define UAC_DCR_MAXAMPL			0x03
#define UAC_DCR_THRESHOLD		0x04
#define UAC_DCR_ATTACK_TIME		0x05
#define UAC_DCR_RELEASE_TIME		0x06

/* A.10.4 Extension Unit Control Selectors */
#define UAC_XU_ENABLE			0x01

/* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */
#define UAC_MS_HEADER			0x01
#define UAC_MIDI_IN_JACK		0x02
#define UAC_MIDI_OUT_JACK		0x03

/* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */
#define UAC_MS_GENERAL			0x01

/* Terminals - 2.1 USB Terminal Types */
#define UAC_TERMINAL_UNDEFINED		0x100
#define UAC_TERMINAL_STREAMING		0x101
#define UAC_TERMINAL_VENDOR_SPEC	0x1FF

/* Terminal Control Selectors */
/* 4.3.2  Class-Specific AC Interface Descriptor */
struct uac1_ac_header_descriptor {
	__u8  bLength;			/* 8 + n */
	__u8  bDescriptorType;		/* USB_DT_CS_INTERFACE */
	__u8  bDescriptorSubtype;	/* UAC_MS_HEADER */
	__le16 bcdADC;			/* 0x0100 */
	__le16 wTotalLength;		/* includes Unit and Terminal desc. */
	__u8  bInCollection;		/* n */
	__u8  baInterfaceNr[];		/* [n] */
} __attribute__ ((packed));

#define UAC_DT_AC_HEADER_SIZE(n)	(8 + (n))

/* As above, but more useful for defining your own descriptors: */
#define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n)			\
struct uac1_ac_header_descriptor_##n {			\
	__u8  bLength;						\
	__u8  bDescriptorType;					\
	__u8  bDescriptorSubtype;				\
	__le16 bcdADC;						\
	__le16 wTotalLength;					\
	__u8  bInCollection;					\
	__u8  baInterfaceNr[n];					\
} __attribute__ ((packed))

/* 4.3.2.1 Input Terminal Descriptor */
struct uac_input_terminal_descriptor {
	__u8  bLength;			/* in bytes: 12 */
	__u8  bDescriptorType;		/* CS_INTERFACE descriptor type */
	__u8  bDescriptorSubtype;	/* INPUT_TERMINAL descriptor subtype */
	__u8  bTerminalID;		/* Constant uniquely terminal ID */
	__le16 wTerminalType;		/* USB Audio Terminal Types */
	__u8  bAssocTerminal;		/* ID of the Output Terminal associated */
	__u8  bNrChannels;		/* Number of logical output channels */
	__le16 wChannelConfig;
	__u8  iChannelNames;
	__u8  iTerminal;
} __attribute__ ((packed));

#define UAC_DT_INPUT_TERMINAL_SIZE			12

/* Terminals - 2.2 Input Terminal Types */
#define UAC_INPUT_TERMINAL_UNDEFINED			0x200
#define UAC_INPUT_TERMINAL_MICROPHONE			0x201
#define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE		0x202
#define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE		0x203
#define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE		0x204
#define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY		0x205
#define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY	0x206

/* Terminals - control selectors */

#define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL		0x01

/* 4.3.2.2 Output Terminal Descriptor */
struct uac1_output_terminal_descriptor {
	__u8  bLength;			/* in bytes: 9 */
	__u8  bDescriptorType;		/* CS_INTERFACE descriptor type */
	__u8  bDescriptorSubtype;	/* OUTPUT_TERMINAL descriptor subtype */
	__u8  bTerminalID;		/* Constant uniquely terminal ID */
	__le16 wTerminalType;		/* USB Audio Terminal Types */
	__u8  bAssocTerminal;		/* ID of the Input Terminal associated */
	__u8  bSourceID;		/* ID of the connected Unit or Terminal*/
	__u8  iTerminal;
} __attribute__ ((packed));

#define UAC_DT_OUTPUT_TERMINAL_SIZE			9

/* Terminals - 2.3 Output Terminal Types */
#define UAC_OUTPUT_TERMINAL_UNDEFINED			0x300
#define UAC_OUTPUT_TERMINAL_SPEAKER			0x301
#define UAC_OUTPUT_TERMINAL_HEADPHONES			0x302
#define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO	0x303
#define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER		0x304
#define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER		0x305
#define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER	0x306
#define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER	0x307

/* Set bControlSize = 2 as default setting */
#define UAC_DT_FEATURE_UNIT_SIZE(ch)		(7 + ((ch) + 1) * 2)

/* As above, but more useful for defining your own descriptors: */
#define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch)			\
struct uac_feature_unit_descriptor_##ch {			\
	__u8  bLength;						\
	__u8  bDescriptorType;					\
	__u8  bDescriptorSubtype;				\
	__u8  bUnitID;						\
	__u8  bSourceID;					\
	__u8  bControlSize;					\
	__le16 bmaControls[ch + 1];				\
	__u8  iFeature;						\
} __attribute__ ((packed))

/* 4.3.2.3 Mixer Unit Descriptor */
struct uac_mixer_unit_descriptor {
	__u8 bLength;
	__u8 bDescriptorType;
	__u8 bDescriptorSubtype;
	__u8 bUnitID;
	__u8 bNrInPins;
	__u8 baSourceID[];
} __attribute__ ((packed));

static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)
{
	return desc->baSourceID[desc->bNrInPins];
}

static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc,
						  int protocol)
{
	if (protocol == UAC_VERSION_1)
		return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
			desc->baSourceID[desc->bNrInPins + 1];
	else
		return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
			(desc->baSourceID[desc->bNrInPins + 3] << 16) |
			(desc->baSourceID[desc->bNrInPins + 2] << 8)  |
			(desc->baSourceID[desc->bNrInPins + 1]);
}

static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc,
						int protocol)
{
	return (protocol == UAC_VERSION_1) ?
		desc->baSourceID[desc->bNrInPins + 3] :
		desc->baSourceID[desc->bNrInPins + 5];
}

static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc,
					      int protocol)
{
	return (protocol == UAC_VERSION_1) ?
		&desc->baSourceID[desc->bNrInPins + 4] :
		&desc->baSourceID[desc->bNrInPins + 6];
}

static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc)
{
	__u8 *raw = (__u8 *) desc;
	return raw[desc->bLength - 1];
}

/* 4.3.2.4 Selector Unit Descriptor */
struct uac_selector_unit_descriptor {
	__u8 bLength;
	__u8 bDescriptorType;
	__u8 bDescriptorSubtype;
	__u8 bUintID;
	__u8 bNrInPins;
	__u8 baSourceID[];
} __attribute__ ((packed));

static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)
{
	__u8 *raw = (__u8 *) desc;
	return raw[desc->bLength - 1];
}

/* 4.3.2.5 Feature Unit Descriptor */
struct uac_feature_unit_descriptor {
	__u8 bLength;
	__u8 bDescriptorType;
	__u8 bDescriptorSubtype;
	__u8 bUnitID;
	__u8 bSourceID;
	__u8 bControlSize;
	__u8 bmaControls[0]; /* variable length */
} __attribute__((packed));

static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc)
{
	__u8 *raw = (__u8 *) desc;
	return raw[desc->bLength - 1];
}

/* 4.3.2.6 Processing Unit Descriptors */
struct uac_processing_unit_descriptor {
	__u8 bLength;
	__u8 bDescriptorType;
	__u8 bDescriptorSubtype;
	__u8 bUnitID;
	__le16 wProcessType;
	__u8 bNrInPins;
	__u8 baSourceID[];
} __attribute__ ((packed));

static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)
{
	return desc->baSourceID[desc->bNrInPins];
}

static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc,
						       int protocol)
{
	if (protocol == UAC_VERSION_1)
		return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
			desc->baSourceID[desc->bNrInPins + 1];
	else
		return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
			(desc->baSourceID[desc->bNrInPins + 3] << 16) |
			(desc->baSourceID[desc->bNrInPins + 2] << 8)  |
			(desc->baSourceID[desc->bNrInPins + 1]);
}

static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc,
						     int protocol)
{
	return (protocol == UAC_VERSION_1) ?
		desc->baSourceID[desc->bNrInPins + 3] :
		desc->baSourceID[desc->bNrInPins + 5];
}

static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc,
						    int protocol)
{
	return (protocol == UAC_VERSION_1) ?
		desc->baSourceID[desc->bNrInPins + 4] :
		desc->baSourceID[desc->bNrInPins + 6];
}

static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc,
						   int protocol)
{
	return (protocol == UAC_VERSION_1) ?
		&desc->baSourceID[desc->bNrInPins + 5] :
		&desc->baSourceID[desc->bNrInPins + 7];
}

static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc,
						   int protocol)
{
	__u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
	return *(uac_processing_unit_bmControls(desc, protocol)
			+ control_size);
}

static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,
						 int protocol)
{
	__u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
	return uac_processing_unit_bmControls(desc, protocol)
			+ control_size + 1;
}

/* 4.5.2 Class-Specific AS Interface Descriptor */
struct uac1_as_header_descriptor {
	__u8  bLength;			/* in bytes: 7 */
	__u8  bDescriptorType;		/* USB_DT_CS_INTERFACE */
	__u8  bDescriptorSubtype;	/* AS_GENERAL */
	__u8  bTerminalLink;		/* Terminal ID of connected Terminal */
	__u8  bDelay;			/* Delay introduced by the data path */
	__le16 wFormatTag;		/* The Audio Data Format */
} __attribute__ ((packed));

#define UAC_DT_AS_HEADER_SIZE		7

/* Formats - A.1.1 Audio Data Format Type I Codes */
#define UAC_FORMAT_TYPE_I_UNDEFINED	0x0
#define UAC_FORMAT_TYPE_I_PCM		0x1
#define UAC_FORMAT_TYPE_I_PCM8		0x2
#define UAC_FORMAT_TYPE_I_IEEE_FLOAT	0x3
#define UAC_FORMAT_TYPE_I_ALAW		0x4
#define UAC_FORMAT_TYPE_I_MULAW		0x5

struct uac_format_type_i_continuous_descriptor {
	__u8  bLength;			/* in bytes: 8 + (ns * 3) */
	__u8  bDescriptorType;		/* USB_DT_CS_INTERFACE */
	__u8  bDescriptorSubtype;	/* FORMAT_TYPE */
	__u8  bFormatType;		/* FORMAT_TYPE_1 */
	__u8  bNrChannels;		/* physical channels in the stream */
	__u8  bSubframeSize;		/* */
	__u8  bBitResolution;
	__u8  bSamFreqType;
	__u8  tLowerSamFreq[3];
	__u8  tUpperSamFreq[3];
} __attribute__ ((packed));

#define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE	14

struct uac_format_type_i_discrete_descriptor {
	__u8  bLength;			/* in bytes: 8 + (ns * 3) */
	__u8  bDescriptorType;		/* USB_DT_CS_INTERFACE */
	__u8  bDescriptorSubtype;	/* FORMAT_TYPE */
	__u8  bFormatType;		/* FORMAT_TYPE_1 */
	__u8  bNrChannels;		/* physical channels in the stream */
	__u8  bSubframeSize;		/* */
	__u8  bBitResolution;
	__u8  bSamFreqType;
	__u8  tSamFreq[][3];
} __attribute__ ((packed));

#define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n)		\
struct uac_format_type_i_discrete_descriptor_##n {		\
	__u8  bLength;						\
	__u8  bDescriptorType;					\
	__u8  bDescriptorSubtype;				\
	__u8  bFormatType;					\
	__u8  bNrChannels;					\
	__u8  bSubframeSize;					\
	__u8  bBitResolution;					\
	__u8  bSamFreqType;					\
	__u8  tSamFreq[n][3];					\
} __attribute__ ((packed))

#define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n)	(8 + (n * 3))

struct uac_format_type_i_ext_descriptor {
	__u8 bLength;
	__u8 bDescriptorType;
	__u8 bDescriptorSubtype;
	__u8 bFormatType;
	__u8 bSubslotSize;
	__u8 bBitResolution;
	__u8 bHeaderLength;
	__u8 bControlSize;
	__u8 bSideBandProtocol;
} __attribute__((packed));

/* Formats - Audio Data Format Type I Codes */

#define UAC_FORMAT_TYPE_II_MPEG	0x1001
#define UAC_FORMAT_TYPE_II_AC3	0x1002

struct uac_format_type_ii_discrete_descriptor {
	__u8 bLength;
	__u8 bDescriptorType;
	__u8 bDescriptorSubtype;
	__u8 bFormatType;
	__le16 wMaxBitRate;
	__le16 wSamplesPerFrame;
	__u8 bSamFreqType;
	__u8 tSamFreq[][3];
} __attribute__((packed));

struct uac_format_type_ii_ext_descriptor {
	__u8 bLength;
	__u8 bDescriptorType;
	__u8 bDescriptorSubtype;
	__u8 bFormatType;
	__le16 wMaxBitRate;
	__le16 wSamplesPerFrame;
	__u8 bHeaderLength;
	__u8 bSideBandProtocol;
} __attribute__((packed));

/* type III */
#define UAC_FORMAT_TYPE_III_IEC1937_AC3	0x2001
#define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1	0x2002
#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT	0x2003
#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT	0x2004
#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS	0x2005
#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS	0x2006

/* Formats - A.2 Format Type Codes */
#define UAC_FORMAT_TYPE_UNDEFINED	0x0
#define UAC_FORMAT_TYPE_I		0x1
#define UAC_FORMAT_TYPE_II		0x2
#define UAC_FORMAT_TYPE_III		0x3
#define UAC_EXT_FORMAT_TYPE_I		0x81
#define UAC_EXT_FORMAT_TYPE_II		0x82
#define UAC_EXT_FORMAT_TYPE_III		0x83

struct uac_iso_endpoint_descriptor {
	__u8  bLength;			/* in bytes: 7 */
	__u8  bDescriptorType;		/* USB_DT_CS_ENDPOINT */
	__u8  bDescriptorSubtype;	/* EP_GENERAL */
	__u8  bmAttributes;
	__u8  bLockDelayUnits;
	__le16 wLockDelay;
} __attribute__((packed));
#define UAC_ISO_ENDPOINT_DESC_SIZE	7

#define UAC_EP_CS_ATTR_SAMPLE_RATE	0x01
#define UAC_EP_CS_ATTR_PITCH_CONTROL	0x02
#define UAC_EP_CS_ATTR_FILL_MAX		0x80

/* status word format (3.7.1.1) */

#define UAC1_STATUS_TYPE_ORIG_MASK		0x0f
#define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF	0x0
#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF	0x1
#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP	0x2

#define UAC1_STATUS_TYPE_IRQ_PENDING		(1 << 7)
#define UAC1_STATUS_TYPE_MEM_CHANGED		(1 << 6)

struct uac1_status_word {
	__u8 bStatusType;
	__u8 bOriginator;
} __attribute__((packed));


#endif /* _UAPI__LINUX_USB_AUDIO_H */