1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * <linux/usb/audio.h> -- USB Audio definitions. 4 * 5 * Copyright (C) 2006 Thumtronics Pty Ltd. 6 * Developed for Thumtronics by Grey Innovation 7 * Ben Williamson <ben.williamson (at) greyinnovation.com> 8 * 9 * This software is distributed under the terms of the GNU General Public 10 * License ("GPL") version 2, as published by the Free Software Foundation. 11 * 12 * This file holds USB constants and structures defined 13 * by the USB Device Class Definition for Audio Devices. 14 * Comments below reference relevant sections of that document: 15 * 16 * http://www.usb.org/developers/devclass_docs/audio10.pdf 17 * 18 * Types and defines in this file are either specific to version 1.0 of 19 * this standard or common for newer versions. 20 */ 21 22 #ifndef _UAPI__LINUX_USB_AUDIO_H 23 #define _UAPI__LINUX_USB_AUDIO_H 24 25 #include <linux/types.h> 26 27 /* bInterfaceProtocol values to denote the version of the standard used */ 28 #define UAC_VERSION_1 0x00 29 #define UAC_VERSION_2 0x20 30 31 /* A.2 Audio Interface Subclass Codes */ 32 #define USB_SUBCLASS_AUDIOCONTROL 0x01 33 #define USB_SUBCLASS_AUDIOSTREAMING 0x02 34 #define USB_SUBCLASS_MIDISTREAMING 0x03 35 36 /* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */ 37 #define UAC_HEADER 0x01 38 #define UAC_INPUT_TERMINAL 0x02 39 #define UAC_OUTPUT_TERMINAL 0x03 40 #define UAC_MIXER_UNIT 0x04 41 #define UAC_SELECTOR_UNIT 0x05 42 #define UAC_FEATURE_UNIT 0x06 43 #define UAC1_PROCESSING_UNIT 0x07 44 #define UAC1_EXTENSION_UNIT 0x08 45 46 /* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */ 47 #define UAC_AS_GENERAL 0x01 48 #define UAC_FORMAT_TYPE 0x02 49 #define UAC_FORMAT_SPECIFIC 0x03 50 51 /* A.7 Processing Unit Process Types */ 52 #define UAC_PROCESS_UNDEFINED 0x00 53 #define UAC_PROCESS_UP_DOWNMIX 0x01 54 #define UAC_PROCESS_DOLBY_PROLOGIC 0x02 55 #define UAC_PROCESS_STEREO_EXTENDER 0x03 56 #define UAC_PROCESS_REVERB 0x04 57 #define UAC_PROCESS_CHORUS 0x05 58 #define UAC_PROCESS_DYN_RANGE_COMP 0x06 59 60 /* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */ 61 #define UAC_EP_GENERAL 0x01 62 63 /* A.9 Audio Class-Specific Request Codes */ 64 #define UAC_SET_ 0x00 65 #define UAC_GET_ 0x80 66 67 #define UAC__CUR 0x1 68 #define UAC__MIN 0x2 69 #define UAC__MAX 0x3 70 #define UAC__RES 0x4 71 #define UAC__MEM 0x5 72 73 #define UAC_SET_CUR (UAC_SET_ | UAC__CUR) 74 #define UAC_GET_CUR (UAC_GET_ | UAC__CUR) 75 #define UAC_SET_MIN (UAC_SET_ | UAC__MIN) 76 #define UAC_GET_MIN (UAC_GET_ | UAC__MIN) 77 #define UAC_SET_MAX (UAC_SET_ | UAC__MAX) 78 #define UAC_GET_MAX (UAC_GET_ | UAC__MAX) 79 #define UAC_SET_RES (UAC_SET_ | UAC__RES) 80 #define UAC_GET_RES (UAC_GET_ | UAC__RES) 81 #define UAC_SET_MEM (UAC_SET_ | UAC__MEM) 82 #define UAC_GET_MEM (UAC_GET_ | UAC__MEM) 83 84 #define UAC_GET_STAT 0xff 85 86 /* A.10 Control Selector Codes */ 87 88 /* A.10.1 Terminal Control Selectors */ 89 #define UAC_TERM_COPY_PROTECT 0x01 90 91 /* A.10.2 Feature Unit Control Selectors */ 92 #define UAC_FU_MUTE 0x01 93 #define UAC_FU_VOLUME 0x02 94 #define UAC_FU_BASS 0x03 95 #define UAC_FU_MID 0x04 96 #define UAC_FU_TREBLE 0x05 97 #define UAC_FU_GRAPHIC_EQUALIZER 0x06 98 #define UAC_FU_AUTOMATIC_GAIN 0x07 99 #define UAC_FU_DELAY 0x08 100 #define UAC_FU_BASS_BOOST 0x09 101 #define UAC_FU_LOUDNESS 0x0a 102 103 #define UAC_CONTROL_BIT(CS) (1 << ((CS) - 1)) 104 105 /* A.10.3.1 Up/Down-mix Processing Unit Controls Selectors */ 106 #define UAC_UD_ENABLE 0x01 107 #define UAC_UD_MODE_SELECT 0x02 108 109 /* A.10.3.2 Dolby Prologic (tm) Processing Unit Controls Selectors */ 110 #define UAC_DP_ENABLE 0x01 111 #define UAC_DP_MODE_SELECT 0x02 112 113 /* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */ 114 #define UAC_3D_ENABLE 0x01 115 #define UAC_3D_SPACE 0x02 116 117 /* A.10.3.4 Reverberation Processing Unit Control Selectors */ 118 #define UAC_REVERB_ENABLE 0x01 119 #define UAC_REVERB_LEVEL 0x02 120 #define UAC_REVERB_TIME 0x03 121 #define UAC_REVERB_FEEDBACK 0x04 122 123 /* A.10.3.5 Chorus Processing Unit Control Selectors */ 124 #define UAC_CHORUS_ENABLE 0x01 125 #define UAC_CHORUS_LEVEL 0x02 126 #define UAC_CHORUS_RATE 0x03 127 #define UAC_CHORUS_DEPTH 0x04 128 129 /* A.10.3.6 Dynamic Range Compressor Unit Control Selectors */ 130 #define UAC_DCR_ENABLE 0x01 131 #define UAC_DCR_RATE 0x02 132 #define UAC_DCR_MAXAMPL 0x03 133 #define UAC_DCR_THRESHOLD 0x04 134 #define UAC_DCR_ATTACK_TIME 0x05 135 #define UAC_DCR_RELEASE_TIME 0x06 136 137 /* A.10.4 Extension Unit Control Selectors */ 138 #define UAC_XU_ENABLE 0x01 139 140 /* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */ 141 #define UAC_MS_HEADER 0x01 142 #define UAC_MIDI_IN_JACK 0x02 143 #define UAC_MIDI_OUT_JACK 0x03 144 145 /* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */ 146 #define UAC_MS_GENERAL 0x01 147 148 /* Terminals - 2.1 USB Terminal Types */ 149 #define UAC_TERMINAL_UNDEFINED 0x100 150 #define UAC_TERMINAL_STREAMING 0x101 151 #define UAC_TERMINAL_VENDOR_SPEC 0x1FF 152 153 /* Terminal Control Selectors */ 154 /* 4.3.2 Class-Specific AC Interface Descriptor */ 155 struct uac1_ac_header_descriptor { 156 __u8 bLength; /* 8 + n */ 157 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 158 __u8 bDescriptorSubtype; /* UAC_MS_HEADER */ 159 __le16 bcdADC; /* 0x0100 */ 160 __le16 wTotalLength; /* includes Unit and Terminal desc. */ 161 __u8 bInCollection; /* n */ 162 __u8 baInterfaceNr[]; /* [n] */ 163 } __attribute__ ((packed)); 164 165 #define UAC_DT_AC_HEADER_SIZE(n) (8 + (n)) 166 167 /* As above, but more useful for defining your own descriptors: */ 168 #define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n) \ 169 struct uac1_ac_header_descriptor_##n { \ 170 __u8 bLength; \ 171 __u8 bDescriptorType; \ 172 __u8 bDescriptorSubtype; \ 173 __le16 bcdADC; \ 174 __le16 wTotalLength; \ 175 __u8 bInCollection; \ 176 __u8 baInterfaceNr[n]; \ 177 } __attribute__ ((packed)) 178 179 /* 4.3.2.1 Input Terminal Descriptor */ 180 struct uac_input_terminal_descriptor { 181 __u8 bLength; /* in bytes: 12 */ 182 __u8 bDescriptorType; /* CS_INTERFACE descriptor type */ 183 __u8 bDescriptorSubtype; /* INPUT_TERMINAL descriptor subtype */ 184 __u8 bTerminalID; /* Constant uniquely terminal ID */ 185 __le16 wTerminalType; /* USB Audio Terminal Types */ 186 __u8 bAssocTerminal; /* ID of the Output Terminal associated */ 187 __u8 bNrChannels; /* Number of logical output channels */ 188 __le16 wChannelConfig; 189 __u8 iChannelNames; 190 __u8 iTerminal; 191 } __attribute__ ((packed)); 192 193 #define UAC_DT_INPUT_TERMINAL_SIZE 12 194 195 /* Terminals - 2.2 Input Terminal Types */ 196 #define UAC_INPUT_TERMINAL_UNDEFINED 0x200 197 #define UAC_INPUT_TERMINAL_MICROPHONE 0x201 198 #define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202 199 #define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203 200 #define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204 201 #define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205 202 #define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206 203 204 /* Terminals - control selectors */ 205 206 #define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL 0x01 207 208 /* 4.3.2.2 Output Terminal Descriptor */ 209 struct uac1_output_terminal_descriptor { 210 __u8 bLength; /* in bytes: 9 */ 211 __u8 bDescriptorType; /* CS_INTERFACE descriptor type */ 212 __u8 bDescriptorSubtype; /* OUTPUT_TERMINAL descriptor subtype */ 213 __u8 bTerminalID; /* Constant uniquely terminal ID */ 214 __le16 wTerminalType; /* USB Audio Terminal Types */ 215 __u8 bAssocTerminal; /* ID of the Input Terminal associated */ 216 __u8 bSourceID; /* ID of the connected Unit or Terminal*/ 217 __u8 iTerminal; 218 } __attribute__ ((packed)); 219 220 #define UAC_DT_OUTPUT_TERMINAL_SIZE 9 221 222 /* Terminals - 2.3 Output Terminal Types */ 223 #define UAC_OUTPUT_TERMINAL_UNDEFINED 0x300 224 #define UAC_OUTPUT_TERMINAL_SPEAKER 0x301 225 #define UAC_OUTPUT_TERMINAL_HEADPHONES 0x302 226 #define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303 227 #define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304 228 #define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305 229 #define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306 230 #define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307 231 232 /* Set bControlSize = 2 as default setting */ 233 #define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2) 234 235 /* As above, but more useful for defining your own descriptors: */ 236 #define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \ 237 struct uac_feature_unit_descriptor_##ch { \ 238 __u8 bLength; \ 239 __u8 bDescriptorType; \ 240 __u8 bDescriptorSubtype; \ 241 __u8 bUnitID; \ 242 __u8 bSourceID; \ 243 __u8 bControlSize; \ 244 __le16 bmaControls[ch + 1]; \ 245 __u8 iFeature; \ 246 } __attribute__ ((packed)) 247 248 /* 4.3.2.3 Mixer Unit Descriptor */ 249 struct uac_mixer_unit_descriptor { 250 __u8 bLength; 251 __u8 bDescriptorType; 252 __u8 bDescriptorSubtype; 253 __u8 bUnitID; 254 __u8 bNrInPins; 255 __u8 baSourceID[]; 256 } __attribute__ ((packed)); 257 258 static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc) 259 { 260 return desc->baSourceID[desc->bNrInPins]; 261 } 262 263 static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc, 264 int protocol) 265 { 266 if (protocol == UAC_VERSION_1) 267 return (desc->baSourceID[desc->bNrInPins + 2] << 8) | 268 desc->baSourceID[desc->bNrInPins + 1]; 269 else 270 return (desc->baSourceID[desc->bNrInPins + 4] << 24) | 271 (desc->baSourceID[desc->bNrInPins + 3] << 16) | 272 (desc->baSourceID[desc->bNrInPins + 2] << 8) | 273 (desc->baSourceID[desc->bNrInPins + 1]); 274 } 275 276 static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc, 277 int protocol) 278 { 279 return (protocol == UAC_VERSION_1) ? 280 desc->baSourceID[desc->bNrInPins + 3] : 281 desc->baSourceID[desc->bNrInPins + 5]; 282 } 283 284 static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc, 285 int protocol) 286 { 287 return (protocol == UAC_VERSION_1) ? 288 &desc->baSourceID[desc->bNrInPins + 4] : 289 &desc->baSourceID[desc->bNrInPins + 6]; 290 } 291 292 static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc) 293 { 294 __u8 *raw = (__u8 *) desc; 295 return raw[desc->bLength - 1]; 296 } 297 298 /* 4.3.2.4 Selector Unit Descriptor */ 299 struct uac_selector_unit_descriptor { 300 __u8 bLength; 301 __u8 bDescriptorType; 302 __u8 bDescriptorSubtype; 303 __u8 bUintID; 304 __u8 bNrInPins; 305 __u8 baSourceID[]; 306 } __attribute__ ((packed)); 307 308 static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc) 309 { 310 __u8 *raw = (__u8 *) desc; 311 return raw[desc->bLength - 1]; 312 } 313 314 /* 4.3.2.5 Feature Unit Descriptor */ 315 struct uac_feature_unit_descriptor { 316 __u8 bLength; 317 __u8 bDescriptorType; 318 __u8 bDescriptorSubtype; 319 __u8 bUnitID; 320 __u8 bSourceID; 321 __u8 bControlSize; 322 __u8 bmaControls[0]; /* variable length */ 323 } __attribute__((packed)); 324 325 static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc) 326 { 327 __u8 *raw = (__u8 *) desc; 328 return raw[desc->bLength - 1]; 329 } 330 331 /* 4.3.2.6 Processing Unit Descriptors */ 332 struct uac_processing_unit_descriptor { 333 __u8 bLength; 334 __u8 bDescriptorType; 335 __u8 bDescriptorSubtype; 336 __u8 bUnitID; 337 __le16 wProcessType; 338 __u8 bNrInPins; 339 __u8 baSourceID[]; 340 } __attribute__ ((packed)); 341 342 static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc) 343 { 344 return desc->baSourceID[desc->bNrInPins]; 345 } 346 347 static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc, 348 int protocol) 349 { 350 if (protocol == UAC_VERSION_1) 351 return (desc->baSourceID[desc->bNrInPins + 2] << 8) | 352 desc->baSourceID[desc->bNrInPins + 1]; 353 else 354 return (desc->baSourceID[desc->bNrInPins + 4] << 24) | 355 (desc->baSourceID[desc->bNrInPins + 3] << 16) | 356 (desc->baSourceID[desc->bNrInPins + 2] << 8) | 357 (desc->baSourceID[desc->bNrInPins + 1]); 358 } 359 360 static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc, 361 int protocol) 362 { 363 return (protocol == UAC_VERSION_1) ? 364 desc->baSourceID[desc->bNrInPins + 3] : 365 desc->baSourceID[desc->bNrInPins + 5]; 366 } 367 368 static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc, 369 int protocol) 370 { 371 return (protocol == UAC_VERSION_1) ? 372 desc->baSourceID[desc->bNrInPins + 4] : 373 desc->baSourceID[desc->bNrInPins + 6]; 374 } 375 376 static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc, 377 int protocol) 378 { 379 return (protocol == UAC_VERSION_1) ? 380 &desc->baSourceID[desc->bNrInPins + 5] : 381 &desc->baSourceID[desc->bNrInPins + 7]; 382 } 383 384 static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc, 385 int protocol) 386 { 387 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol); 388 return *(uac_processing_unit_bmControls(desc, protocol) 389 + control_size); 390 } 391 392 static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc, 393 int protocol) 394 { 395 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol); 396 return uac_processing_unit_bmControls(desc, protocol) 397 + control_size + 1; 398 } 399 400 /* 4.5.2 Class-Specific AS Interface Descriptor */ 401 struct uac1_as_header_descriptor { 402 __u8 bLength; /* in bytes: 7 */ 403 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 404 __u8 bDescriptorSubtype; /* AS_GENERAL */ 405 __u8 bTerminalLink; /* Terminal ID of connected Terminal */ 406 __u8 bDelay; /* Delay introduced by the data path */ 407 __le16 wFormatTag; /* The Audio Data Format */ 408 } __attribute__ ((packed)); 409 410 #define UAC_DT_AS_HEADER_SIZE 7 411 412 /* Formats - A.1.1 Audio Data Format Type I Codes */ 413 #define UAC_FORMAT_TYPE_I_UNDEFINED 0x0 414 #define UAC_FORMAT_TYPE_I_PCM 0x1 415 #define UAC_FORMAT_TYPE_I_PCM8 0x2 416 #define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3 417 #define UAC_FORMAT_TYPE_I_ALAW 0x4 418 #define UAC_FORMAT_TYPE_I_MULAW 0x5 419 420 struct uac_format_type_i_continuous_descriptor { 421 __u8 bLength; /* in bytes: 8 + (ns * 3) */ 422 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 423 __u8 bDescriptorSubtype; /* FORMAT_TYPE */ 424 __u8 bFormatType; /* FORMAT_TYPE_1 */ 425 __u8 bNrChannels; /* physical channels in the stream */ 426 __u8 bSubframeSize; /* */ 427 __u8 bBitResolution; 428 __u8 bSamFreqType; 429 __u8 tLowerSamFreq[3]; 430 __u8 tUpperSamFreq[3]; 431 } __attribute__ ((packed)); 432 433 #define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14 434 435 struct uac_format_type_i_discrete_descriptor { 436 __u8 bLength; /* in bytes: 8 + (ns * 3) */ 437 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 438 __u8 bDescriptorSubtype; /* FORMAT_TYPE */ 439 __u8 bFormatType; /* FORMAT_TYPE_1 */ 440 __u8 bNrChannels; /* physical channels in the stream */ 441 __u8 bSubframeSize; /* */ 442 __u8 bBitResolution; 443 __u8 bSamFreqType; 444 __u8 tSamFreq[][3]; 445 } __attribute__ ((packed)); 446 447 #define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \ 448 struct uac_format_type_i_discrete_descriptor_##n { \ 449 __u8 bLength; \ 450 __u8 bDescriptorType; \ 451 __u8 bDescriptorSubtype; \ 452 __u8 bFormatType; \ 453 __u8 bNrChannels; \ 454 __u8 bSubframeSize; \ 455 __u8 bBitResolution; \ 456 __u8 bSamFreqType; \ 457 __u8 tSamFreq[n][3]; \ 458 } __attribute__ ((packed)) 459 460 #define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3)) 461 462 struct uac_format_type_i_ext_descriptor { 463 __u8 bLength; 464 __u8 bDescriptorType; 465 __u8 bDescriptorSubtype; 466 __u8 bFormatType; 467 __u8 bSubslotSize; 468 __u8 bBitResolution; 469 __u8 bHeaderLength; 470 __u8 bControlSize; 471 __u8 bSideBandProtocol; 472 } __attribute__((packed)); 473 474 /* Formats - Audio Data Format Type I Codes */ 475 476 #define UAC_FORMAT_TYPE_II_MPEG 0x1001 477 #define UAC_FORMAT_TYPE_II_AC3 0x1002 478 479 struct uac_format_type_ii_discrete_descriptor { 480 __u8 bLength; 481 __u8 bDescriptorType; 482 __u8 bDescriptorSubtype; 483 __u8 bFormatType; 484 __le16 wMaxBitRate; 485 __le16 wSamplesPerFrame; 486 __u8 bSamFreqType; 487 __u8 tSamFreq[][3]; 488 } __attribute__((packed)); 489 490 struct uac_format_type_ii_ext_descriptor { 491 __u8 bLength; 492 __u8 bDescriptorType; 493 __u8 bDescriptorSubtype; 494 __u8 bFormatType; 495 __le16 wMaxBitRate; 496 __le16 wSamplesPerFrame; 497 __u8 bHeaderLength; 498 __u8 bSideBandProtocol; 499 } __attribute__((packed)); 500 501 /* type III */ 502 #define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001 503 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1 0x2002 504 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003 505 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT 0x2004 506 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS 0x2005 507 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS 0x2006 508 509 /* Formats - A.2 Format Type Codes */ 510 #define UAC_FORMAT_TYPE_UNDEFINED 0x0 511 #define UAC_FORMAT_TYPE_I 0x1 512 #define UAC_FORMAT_TYPE_II 0x2 513 #define UAC_FORMAT_TYPE_III 0x3 514 #define UAC_EXT_FORMAT_TYPE_I 0x81 515 #define UAC_EXT_FORMAT_TYPE_II 0x82 516 #define UAC_EXT_FORMAT_TYPE_III 0x83 517 518 struct uac_iso_endpoint_descriptor { 519 __u8 bLength; /* in bytes: 7 */ 520 __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */ 521 __u8 bDescriptorSubtype; /* EP_GENERAL */ 522 __u8 bmAttributes; 523 __u8 bLockDelayUnits; 524 __le16 wLockDelay; 525 } __attribute__((packed)); 526 #define UAC_ISO_ENDPOINT_DESC_SIZE 7 527 528 #define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01 529 #define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02 530 #define UAC_EP_CS_ATTR_FILL_MAX 0x80 531 532 /* status word format (3.7.1.1) */ 533 534 #define UAC1_STATUS_TYPE_ORIG_MASK 0x0f 535 #define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF 0x0 536 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF 0x1 537 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP 0x2 538 539 #define UAC1_STATUS_TYPE_IRQ_PENDING (1 << 7) 540 #define UAC1_STATUS_TYPE_MEM_CHANGED (1 << 6) 541 542 struct uac1_status_word { 543 __u8 bStatusType; 544 __u8 bOriginator; 545 } __attribute__((packed)); 546 547 548 #endif /* _UAPI__LINUX_USB_AUDIO_H */ 549
