Line data Source code
1 : /*
2 : * <linux/usb/audio.h> -- USB Audio definitions.
3 : *
4 : * Copyright (C) 2006 Thumtronics Pty Ltd.
5 : * Developed for Thumtronics by Grey Innovation
6 : * Ben Williamson <ben.williamson@greyinnovation.com>
7 : *
8 : * This software is distributed under the terms of the GNU General Public
9 : * License ("GPL") version 2, as published by the Free Software Foundation.
10 : *
11 : * This file holds USB constants and structures defined
12 : * by the USB Device Class Definition for Audio Devices.
13 : * Comments below reference relevant sections of that document:
14 : *
15 : * http://www.usb.org/developers/devclass_docs/audio10.pdf
16 : *
17 : * Types and defines in this file are either specific to version 1.0 of
18 : * this standard or common for newer versions.
19 : */
20 :
21 : #ifndef _UAPI__LINUX_USB_AUDIO_H
22 : #define _UAPI__LINUX_USB_AUDIO_H
23 :
24 : #include <linux/types.h>
25 :
26 : /* bInterfaceProtocol values to denote the version of the standard used */
27 : #define UAC_VERSION_1 0x00
28 : #define UAC_VERSION_2 0x20
29 :
30 : /* A.2 Audio Interface Subclass Codes */
31 : #define USB_SUBCLASS_AUDIOCONTROL 0x01
32 : #define USB_SUBCLASS_AUDIOSTREAMING 0x02
33 : #define USB_SUBCLASS_MIDISTREAMING 0x03
34 :
35 : /* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */
36 : #define UAC_HEADER 0x01
37 : #define UAC_INPUT_TERMINAL 0x02
38 : #define UAC_OUTPUT_TERMINAL 0x03
39 : #define UAC_MIXER_UNIT 0x04
40 : #define UAC_SELECTOR_UNIT 0x05
41 : #define UAC_FEATURE_UNIT 0x06
42 : #define UAC1_PROCESSING_UNIT 0x07
43 : #define UAC1_EXTENSION_UNIT 0x08
44 :
45 : /* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */
46 : #define UAC_AS_GENERAL 0x01
47 : #define UAC_FORMAT_TYPE 0x02
48 : #define UAC_FORMAT_SPECIFIC 0x03
49 :
50 : /* A.7 Processing Unit Process Types */
51 : #define UAC_PROCESS_UNDEFINED 0x00
52 : #define UAC_PROCESS_UP_DOWNMIX 0x01
53 : #define UAC_PROCESS_DOLBY_PROLOGIC 0x02
54 : #define UAC_PROCESS_STEREO_EXTENDER 0x03
55 : #define UAC_PROCESS_REVERB 0x04
56 : #define UAC_PROCESS_CHORUS 0x05
57 : #define UAC_PROCESS_DYN_RANGE_COMP 0x06
58 :
59 : /* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */
60 : #define UAC_EP_GENERAL 0x01
61 :
62 : /* A.9 Audio Class-Specific Request Codes */
63 : #define UAC_SET_ 0x00
64 : #define UAC_GET_ 0x80
65 :
66 : #define UAC__CUR 0x1
67 : #define UAC__MIN 0x2
68 : #define UAC__MAX 0x3
69 : #define UAC__RES 0x4
70 : #define UAC__MEM 0x5
71 :
72 : #define UAC_SET_CUR (UAC_SET_ | UAC__CUR)
73 : #define UAC_GET_CUR (UAC_GET_ | UAC__CUR)
74 : #define UAC_SET_MIN (UAC_SET_ | UAC__MIN)
75 : #define UAC_GET_MIN (UAC_GET_ | UAC__MIN)
76 : #define UAC_SET_MAX (UAC_SET_ | UAC__MAX)
77 : #define UAC_GET_MAX (UAC_GET_ | UAC__MAX)
78 : #define UAC_SET_RES (UAC_SET_ | UAC__RES)
79 : #define UAC_GET_RES (UAC_GET_ | UAC__RES)
80 : #define UAC_SET_MEM (UAC_SET_ | UAC__MEM)
81 : #define UAC_GET_MEM (UAC_GET_ | UAC__MEM)
82 :
83 : #define UAC_GET_STAT 0xff
84 :
85 : /* A.10 Control Selector Codes */
86 :
87 : /* A.10.1 Terminal Control Selectors */
88 : #define UAC_TERM_COPY_PROTECT 0x01
89 :
90 : /* A.10.2 Feature Unit Control Selectors */
91 : #define UAC_FU_MUTE 0x01
92 : #define UAC_FU_VOLUME 0x02
93 : #define UAC_FU_BASS 0x03
94 : #define UAC_FU_MID 0x04
95 : #define UAC_FU_TREBLE 0x05
96 : #define UAC_FU_GRAPHIC_EQUALIZER 0x06
97 : #define UAC_FU_AUTOMATIC_GAIN 0x07
98 : #define UAC_FU_DELAY 0x08
99 : #define UAC_FU_BASS_BOOST 0x09
100 : #define UAC_FU_LOUDNESS 0x0a
101 :
102 : #define UAC_CONTROL_BIT(CS) (1 << ((CS) - 1))
103 :
104 : /* A.10.3.1 Up/Down-mix Processing Unit Controls Selectors */
105 : #define UAC_UD_ENABLE 0x01
106 : #define UAC_UD_MODE_SELECT 0x02
107 :
108 : /* A.10.3.2 Dolby Prologic (tm) Processing Unit Controls Selectors */
109 : #define UAC_DP_ENABLE 0x01
110 : #define UAC_DP_MODE_SELECT 0x02
111 :
112 : /* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */
113 : #define UAC_3D_ENABLE 0x01
114 : #define UAC_3D_SPACE 0x02
115 :
116 : /* A.10.3.4 Reverberation Processing Unit Control Selectors */
117 : #define UAC_REVERB_ENABLE 0x01
118 : #define UAC_REVERB_LEVEL 0x02
119 : #define UAC_REVERB_TIME 0x03
120 : #define UAC_REVERB_FEEDBACK 0x04
121 :
122 : /* A.10.3.5 Chorus Processing Unit Control Selectors */
123 : #define UAC_CHORUS_ENABLE 0x01
124 : #define UAC_CHORUS_LEVEL 0x02
125 : #define UAC_CHORUS_RATE 0x03
126 : #define UAC_CHORUS_DEPTH 0x04
127 :
128 : /* A.10.3.6 Dynamic Range Compressor Unit Control Selectors */
129 : #define UAC_DCR_ENABLE 0x01
130 : #define UAC_DCR_RATE 0x02
131 : #define UAC_DCR_MAXAMPL 0x03
132 : #define UAC_DCR_THRESHOLD 0x04
133 : #define UAC_DCR_ATTACK_TIME 0x05
134 : #define UAC_DCR_RELEASE_TIME 0x06
135 :
136 : /* A.10.4 Extension Unit Control Selectors */
137 : #define UAC_XU_ENABLE 0x01
138 :
139 : /* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */
140 : #define UAC_MS_HEADER 0x01
141 : #define UAC_MIDI_IN_JACK 0x02
142 : #define UAC_MIDI_OUT_JACK 0x03
143 :
144 : /* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */
145 : #define UAC_MS_GENERAL 0x01
146 :
147 : /* Terminals - 2.1 USB Terminal Types */
148 : #define UAC_TERMINAL_UNDEFINED 0x100
149 : #define UAC_TERMINAL_STREAMING 0x101
150 : #define UAC_TERMINAL_VENDOR_SPEC 0x1FF
151 :
152 : /* Terminal Control Selectors */
153 : /* 4.3.2 Class-Specific AC Interface Descriptor */
154 : struct uac1_ac_header_descriptor {
155 : __u8 bLength; /* 8 + n */
156 : __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
157 : __u8 bDescriptorSubtype; /* UAC_MS_HEADER */
158 : __le16 bcdADC; /* 0x0100 */
159 : __le16 wTotalLength; /* includes Unit and Terminal desc. */
160 : __u8 bInCollection; /* n */
161 : __u8 baInterfaceNr[]; /* [n] */
162 : } __attribute__ ((packed));
163 :
164 : #define UAC_DT_AC_HEADER_SIZE(n) (8 + (n))
165 :
166 : /* As above, but more useful for defining your own descriptors: */
167 : #define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n) \
168 : struct uac1_ac_header_descriptor_##n { \
169 : __u8 bLength; \
170 : __u8 bDescriptorType; \
171 : __u8 bDescriptorSubtype; \
172 : __le16 bcdADC; \
173 : __le16 wTotalLength; \
174 : __u8 bInCollection; \
175 : __u8 baInterfaceNr[n]; \
176 : } __attribute__ ((packed))
177 :
178 : /* 4.3.2.1 Input Terminal Descriptor */
179 : struct uac_input_terminal_descriptor {
180 : __u8 bLength; /* in bytes: 12 */
181 : __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
182 : __u8 bDescriptorSubtype; /* INPUT_TERMINAL descriptor subtype */
183 : __u8 bTerminalID; /* Constant uniquely terminal ID */
184 : __le16 wTerminalType; /* USB Audio Terminal Types */
185 : __u8 bAssocTerminal; /* ID of the Output Terminal associated */
186 : __u8 bNrChannels; /* Number of logical output channels */
187 : __le16 wChannelConfig;
188 : __u8 iChannelNames;
189 : __u8 iTerminal;
190 : } __attribute__ ((packed));
191 :
192 : #define UAC_DT_INPUT_TERMINAL_SIZE 12
193 :
194 : /* Terminals - 2.2 Input Terminal Types */
195 : #define UAC_INPUT_TERMINAL_UNDEFINED 0x200
196 : #define UAC_INPUT_TERMINAL_MICROPHONE 0x201
197 : #define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202
198 : #define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203
199 : #define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204
200 : #define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205
201 : #define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206
202 :
203 : /* Terminals - control selectors */
204 :
205 : #define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL 0x01
206 :
207 : /* 4.3.2.2 Output Terminal Descriptor */
208 : struct uac1_output_terminal_descriptor {
209 : __u8 bLength; /* in bytes: 9 */
210 : __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
211 : __u8 bDescriptorSubtype; /* OUTPUT_TERMINAL descriptor subtype */
212 : __u8 bTerminalID; /* Constant uniquely terminal ID */
213 : __le16 wTerminalType; /* USB Audio Terminal Types */
214 : __u8 bAssocTerminal; /* ID of the Input Terminal associated */
215 : __u8 bSourceID; /* ID of the connected Unit or Terminal*/
216 : __u8 iTerminal;
217 : } __attribute__ ((packed));
218 :
219 : #define UAC_DT_OUTPUT_TERMINAL_SIZE 9
220 :
221 : /* Terminals - 2.3 Output Terminal Types */
222 : #define UAC_OUTPUT_TERMINAL_UNDEFINED 0x300
223 : #define UAC_OUTPUT_TERMINAL_SPEAKER 0x301
224 : #define UAC_OUTPUT_TERMINAL_HEADPHONES 0x302
225 : #define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303
226 : #define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304
227 : #define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305
228 : #define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306
229 : #define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307
230 :
231 : /* Set bControlSize = 2 as default setting */
232 : #define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2)
233 :
234 : /* As above, but more useful for defining your own descriptors: */
235 : #define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \
236 : struct uac_feature_unit_descriptor_##ch { \
237 : __u8 bLength; \
238 : __u8 bDescriptorType; \
239 : __u8 bDescriptorSubtype; \
240 : __u8 bUnitID; \
241 : __u8 bSourceID; \
242 : __u8 bControlSize; \
243 : __le16 bmaControls[ch + 1]; \
244 : __u8 iFeature; \
245 : } __attribute__ ((packed))
246 :
247 : /* 4.3.2.3 Mixer Unit Descriptor */
248 : struct uac_mixer_unit_descriptor {
249 : __u8 bLength;
250 : __u8 bDescriptorType;
251 : __u8 bDescriptorSubtype;
252 : __u8 bUnitID;
253 : __u8 bNrInPins;
254 : __u8 baSourceID[];
255 : } __attribute__ ((packed));
256 :
257 : static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)
258 : {
259 0 : return desc->baSourceID[desc->bNrInPins];
260 : }
261 :
262 : static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc,
263 : int protocol)
264 : {
265 0 : if (protocol == UAC_VERSION_1)
266 0 : return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
267 0 : desc->baSourceID[desc->bNrInPins + 1];
268 : else
269 0 : return (desc->baSourceID[desc->bNrInPins + 4] << 24) |
270 0 : (desc->baSourceID[desc->bNrInPins + 3] << 16) |
271 0 : (desc->baSourceID[desc->bNrInPins + 2] << 8) |
272 0 : (desc->baSourceID[desc->bNrInPins + 1]);
273 : }
274 :
275 : static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc,
276 : int protocol)
277 : {
278 : return (protocol == UAC_VERSION_1) ?
279 : desc->baSourceID[desc->bNrInPins + 3] :
280 : desc->baSourceID[desc->bNrInPins + 5];
281 : }
282 :
283 : static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc,
284 : int protocol)
285 : {
286 : return (protocol == UAC_VERSION_1) ?
287 0 : &desc->baSourceID[desc->bNrInPins + 4] :
288 0 : &desc->baSourceID[desc->bNrInPins + 6];
289 : }
290 :
291 : static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc)
292 : {
293 : __u8 *raw = (__u8 *) desc;
294 0 : return raw[desc->bLength - 1];
295 : }
296 :
297 : /* 4.3.2.4 Selector Unit Descriptor */
298 : struct uac_selector_unit_descriptor {
299 : __u8 bLength;
300 : __u8 bDescriptorType;
301 : __u8 bDescriptorSubtype;
302 : __u8 bUintID;
303 : __u8 bNrInPins;
304 : __u8 baSourceID[];
305 : } __attribute__ ((packed));
306 :
307 : static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)
308 : {
309 : __u8 *raw = (__u8 *) desc;
310 0 : return raw[desc->bLength - 1];
311 : }
312 :
313 : /* 4.3.2.5 Feature Unit Descriptor */
314 : struct uac_feature_unit_descriptor {
315 : __u8 bLength;
316 : __u8 bDescriptorType;
317 : __u8 bDescriptorSubtype;
318 : __u8 bUnitID;
319 : __u8 bSourceID;
320 : __u8 bControlSize;
321 : __u8 bmaControls[0]; /* variable length */
322 : } __attribute__((packed));
323 :
324 : static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc)
325 : {
326 : __u8 *raw = (__u8 *) desc;
327 3 : return raw[desc->bLength - 1];
328 : }
329 :
330 : /* 4.3.2.6 Processing Unit Descriptors */
331 : struct uac_processing_unit_descriptor {
332 : __u8 bLength;
333 : __u8 bDescriptorType;
334 : __u8 bDescriptorSubtype;
335 : __u8 bUnitID;
336 : __u16 wProcessType;
337 : __u8 bNrInPins;
338 : __u8 baSourceID[];
339 : } __attribute__ ((packed));
340 :
341 : static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)
342 : {
343 0 : return desc->baSourceID[desc->bNrInPins];
344 : }
345 :
346 : static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc,
347 : int protocol)
348 : {
349 0 : if (protocol == UAC_VERSION_1)
350 0 : return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
351 0 : desc->baSourceID[desc->bNrInPins + 1];
352 : else
353 0 : return (desc->baSourceID[desc->bNrInPins + 4] << 24) |
354 0 : (desc->baSourceID[desc->bNrInPins + 3] << 16) |
355 0 : (desc->baSourceID[desc->bNrInPins + 2] << 8) |
356 0 : (desc->baSourceID[desc->bNrInPins + 1]);
357 : }
358 :
359 : static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc,
360 : int protocol)
361 : {
362 : return (protocol == UAC_VERSION_1) ?
363 : desc->baSourceID[desc->bNrInPins + 3] :
364 : desc->baSourceID[desc->bNrInPins + 5];
365 : }
366 :
367 : static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc,
368 : int protocol)
369 : {
370 0 : return (protocol == UAC_VERSION_1) ?
371 0 : desc->baSourceID[desc->bNrInPins + 4] :
372 0 : desc->baSourceID[desc->bNrInPins + 6];
373 : }
374 :
375 : static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc,
376 : int protocol)
377 : {
378 : return (protocol == UAC_VERSION_1) ?
379 0 : &desc->baSourceID[desc->bNrInPins + 5] :
380 0 : &desc->baSourceID[desc->bNrInPins + 7];
381 : }
382 :
383 : static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc,
384 : int protocol)
385 : {
386 : __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
387 0 : return *(uac_processing_unit_bmControls(desc, protocol)
388 0 : + control_size);
389 : }
390 :
391 : static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,
392 : int protocol)
393 : {
394 : __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
395 0 : return uac_processing_unit_bmControls(desc, protocol)
396 0 : + control_size + 1;
397 : }
398 :
399 : /* 4.5.2 Class-Specific AS Interface Descriptor */
400 : struct uac1_as_header_descriptor {
401 : __u8 bLength; /* in bytes: 7 */
402 : __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
403 : __u8 bDescriptorSubtype; /* AS_GENERAL */
404 : __u8 bTerminalLink; /* Terminal ID of connected Terminal */
405 : __u8 bDelay; /* Delay introduced by the data path */
406 : __le16 wFormatTag; /* The Audio Data Format */
407 : } __attribute__ ((packed));
408 :
409 : #define UAC_DT_AS_HEADER_SIZE 7
410 :
411 : /* Formats - A.1.1 Audio Data Format Type I Codes */
412 : #define UAC_FORMAT_TYPE_I_UNDEFINED 0x0
413 : #define UAC_FORMAT_TYPE_I_PCM 0x1
414 : #define UAC_FORMAT_TYPE_I_PCM8 0x2
415 : #define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3
416 : #define UAC_FORMAT_TYPE_I_ALAW 0x4
417 : #define UAC_FORMAT_TYPE_I_MULAW 0x5
418 :
419 : struct uac_format_type_i_continuous_descriptor {
420 : __u8 bLength; /* in bytes: 8 + (ns * 3) */
421 : __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
422 : __u8 bDescriptorSubtype; /* FORMAT_TYPE */
423 : __u8 bFormatType; /* FORMAT_TYPE_1 */
424 : __u8 bNrChannels; /* physical channels in the stream */
425 : __u8 bSubframeSize; /* */
426 : __u8 bBitResolution;
427 : __u8 bSamFreqType;
428 : __u8 tLowerSamFreq[3];
429 : __u8 tUpperSamFreq[3];
430 : } __attribute__ ((packed));
431 :
432 : #define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14
433 :
434 : struct uac_format_type_i_discrete_descriptor {
435 : __u8 bLength; /* in bytes: 8 + (ns * 3) */
436 : __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
437 : __u8 bDescriptorSubtype; /* FORMAT_TYPE */
438 : __u8 bFormatType; /* FORMAT_TYPE_1 */
439 : __u8 bNrChannels; /* physical channels in the stream */
440 : __u8 bSubframeSize; /* */
441 : __u8 bBitResolution;
442 : __u8 bSamFreqType;
443 : __u8 tSamFreq[][3];
444 : } __attribute__ ((packed));
445 :
446 : #define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \
447 : struct uac_format_type_i_discrete_descriptor_##n { \
448 : __u8 bLength; \
449 : __u8 bDescriptorType; \
450 : __u8 bDescriptorSubtype; \
451 : __u8 bFormatType; \
452 : __u8 bNrChannels; \
453 : __u8 bSubframeSize; \
454 : __u8 bBitResolution; \
455 : __u8 bSamFreqType; \
456 : __u8 tSamFreq[n][3]; \
457 : } __attribute__ ((packed))
458 :
459 : #define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
460 :
461 : struct uac_format_type_i_ext_descriptor {
462 : __u8 bLength;
463 : __u8 bDescriptorType;
464 : __u8 bDescriptorSubtype;
465 : __u8 bFormatType;
466 : __u8 bSubslotSize;
467 : __u8 bBitResolution;
468 : __u8 bHeaderLength;
469 : __u8 bControlSize;
470 : __u8 bSideBandProtocol;
471 : } __attribute__((packed));
472 :
473 : /* Formats - Audio Data Format Type I Codes */
474 :
475 : #define UAC_FORMAT_TYPE_II_MPEG 0x1001
476 : #define UAC_FORMAT_TYPE_II_AC3 0x1002
477 :
478 : struct uac_format_type_ii_discrete_descriptor {
479 : __u8 bLength;
480 : __u8 bDescriptorType;
481 : __u8 bDescriptorSubtype;
482 : __u8 bFormatType;
483 : __le16 wMaxBitRate;
484 : __le16 wSamplesPerFrame;
485 : __u8 bSamFreqType;
486 : __u8 tSamFreq[][3];
487 : } __attribute__((packed));
488 :
489 : struct uac_format_type_ii_ext_descriptor {
490 : __u8 bLength;
491 : __u8 bDescriptorType;
492 : __u8 bDescriptorSubtype;
493 : __u8 bFormatType;
494 : __u16 wMaxBitRate;
495 : __u16 wSamplesPerFrame;
496 : __u8 bHeaderLength;
497 : __u8 bSideBandProtocol;
498 : } __attribute__((packed));
499 :
500 : /* type III */
501 : #define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001
502 : #define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1 0x2002
503 : #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003
504 : #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT 0x2004
505 : #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS 0x2005
506 : #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS 0x2006
507 :
508 : /* Formats - A.2 Format Type Codes */
509 : #define UAC_FORMAT_TYPE_UNDEFINED 0x0
510 : #define UAC_FORMAT_TYPE_I 0x1
511 : #define UAC_FORMAT_TYPE_II 0x2
512 : #define UAC_FORMAT_TYPE_III 0x3
513 : #define UAC_EXT_FORMAT_TYPE_I 0x81
514 : #define UAC_EXT_FORMAT_TYPE_II 0x82
515 : #define UAC_EXT_FORMAT_TYPE_III 0x83
516 :
517 : struct uac_iso_endpoint_descriptor {
518 : __u8 bLength; /* in bytes: 7 */
519 : __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */
520 : __u8 bDescriptorSubtype; /* EP_GENERAL */
521 : __u8 bmAttributes;
522 : __u8 bLockDelayUnits;
523 : __le16 wLockDelay;
524 : } __attribute__((packed));
525 : #define UAC_ISO_ENDPOINT_DESC_SIZE 7
526 :
527 : #define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01
528 : #define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02
529 : #define UAC_EP_CS_ATTR_FILL_MAX 0x80
530 :
531 : /* status word format (3.7.1.1) */
532 :
533 : #define UAC1_STATUS_TYPE_ORIG_MASK 0x0f
534 : #define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF 0x0
535 : #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF 0x1
536 : #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP 0x2
537 :
538 : #define UAC1_STATUS_TYPE_IRQ_PENDING (1 << 7)
539 : #define UAC1_STATUS_TYPE_MEM_CHANGED (1 << 6)
540 :
541 : struct uac1_status_word {
542 : __u8 bStatusType;
543 : __u8 bOriginator;
544 : } __attribute__((packed));
545 :
546 :
547 : #endif /* _UAPI__LINUX_USB_AUDIO_H */
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