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TOMOYO Linux Cross Reference
Linux/include/uapi/linux/usb/audio.h

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  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         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         if (protocol == UAC_VERSION_1)
266                 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
267                         desc->baSourceID[desc->bNrInPins + 1];
268         else
269                 return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
270                         (desc->baSourceID[desc->bNrInPins + 3] << 16) |
271                         (desc->baSourceID[desc->bNrInPins + 2] << 8)  |
272                         (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                 &desc->baSourceID[desc->bNrInPins + 4] :
288                 &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         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         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         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         __le16 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         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         if (protocol == UAC_VERSION_1)
350                 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
351                         desc->baSourceID[desc->bNrInPins + 1];
352         else
353                 return  (desc->baSourceID[desc->bNrInPins + 4] << 24) |
354                         (desc->baSourceID[desc->bNrInPins + 3] << 16) |
355                         (desc->baSourceID[desc->bNrInPins + 2] << 8)  |
356                         (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         return (protocol == UAC_VERSION_1) ?
371                 desc->baSourceID[desc->bNrInPins + 4] :
372                 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                 &desc->baSourceID[desc->bNrInPins + 5] :
380                 &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         return *(uac_processing_unit_bmControls(desc, protocol)
388                         + 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         return uac_processing_unit_bmControls(desc, protocol)
396                         + 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         __le16 wMaxBitRate;
495         __le16 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 */
548 

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