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@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 #define UAC_VERSION_3 0x30 31 32 /* A.2 Audio Interface Subclass Codes */ 33 #define USB_SUBCLASS_AUDIOCONTROL 0x01 34 #define USB_SUBCLASS_AUDIOSTREAMING 0x02 35 #define USB_SUBCLASS_MIDISTREAMING 0x03 36 37 /* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */ 38 #define UAC_HEADER 0x01 39 #define UAC_INPUT_TERMINAL 0x02 40 #define UAC_OUTPUT_TERMINAL 0x03 41 #define UAC_MIXER_UNIT 0x04 42 #define UAC_SELECTOR_UNIT 0x05 43 #define UAC_FEATURE_UNIT 0x06 44 #define UAC1_PROCESSING_UNIT 0x07 45 #define UAC1_EXTENSION_UNIT 0x08 46 47 /* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */ 48 #define UAC_AS_GENERAL 0x01 49 #define UAC_FORMAT_TYPE 0x02 50 #define UAC_FORMAT_SPECIFIC 0x03 51 52 /* A.7 Processing Unit Process Types */ 53 #define UAC_PROCESS_UNDEFINED 0x00 54 #define UAC_PROCESS_UP_DOWNMIX 0x01 55 #define UAC_PROCESS_DOLBY_PROLOGIC 0x02 56 #define UAC_PROCESS_STEREO_EXTENDER 0x03 57 #define UAC_PROCESS_REVERB 0x04 58 #define UAC_PROCESS_CHORUS 0x05 59 #define UAC_PROCESS_DYN_RANGE_COMP 0x06 60 61 /* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */ 62 #define UAC_EP_GENERAL 0x01 63 64 /* A.9 Audio Class-Specific Request Codes */ 65 #define UAC_SET_ 0x00 66 #define UAC_GET_ 0x80 67 68 #define UAC__CUR 0x1 69 #define UAC__MIN 0x2 70 #define UAC__MAX 0x3 71 #define UAC__RES 0x4 72 #define UAC__MEM 0x5 73 74 #define UAC_SET_CUR (UAC_SET_ | UAC__CUR) 75 #define UAC_GET_CUR (UAC_GET_ | UAC__CUR) 76 #define UAC_SET_MIN (UAC_SET_ | UAC__MIN) 77 #define UAC_GET_MIN (UAC_GET_ | UAC__MIN) 78 #define UAC_SET_MAX (UAC_SET_ | UAC__MAX) 79 #define UAC_GET_MAX (UAC_GET_ | UAC__MAX) 80 #define UAC_SET_RES (UAC_SET_ | UAC__RES) 81 #define UAC_GET_RES (UAC_GET_ | UAC__RES) 82 #define UAC_SET_MEM (UAC_SET_ | UAC__MEM) 83 #define UAC_GET_MEM (UAC_GET_ | UAC__MEM) 84 85 #define UAC_GET_STAT 0xff 86 87 /* A.10 Control Selector Codes */ 88 89 /* A.10.1 Terminal Control Selectors */ 90 #define UAC_TERM_COPY_PROTECT 0x01 91 92 /* A.10.2 Feature Unit Control Selectors */ 93 #define UAC_FU_MUTE 0x01 94 #define UAC_FU_VOLUME 0x02 95 #define UAC_FU_BASS 0x03 96 #define UAC_FU_MID 0x04 97 #define UAC_FU_TREBLE 0x05 98 #define UAC_FU_GRAPHIC_EQUALIZER 0x06 99 #define UAC_FU_AUTOMATIC_GAIN 0x07 100 #define UAC_FU_DELAY 0x08 101 #define UAC_FU_BASS_BOOST 0x09 102 #define UAC_FU_LOUDNESS 0x0a 103 104 #define UAC_CONTROL_BIT(CS) (1 << ((CS) - 1)) 105 106 /* A.10.3.1 Up/Down-mix Processing Unit Controls Selectors */ 107 #define UAC_UD_ENABLE 0x01 108 #define UAC_UD_MODE_SELECT 0x02 109 110 /* A.10.3.2 Dolby Prologic (tm) Processing Unit Controls Selectors */ 111 #define UAC_DP_ENABLE 0x01 112 #define UAC_DP_MODE_SELECT 0x02 113 114 /* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */ 115 #define UAC_3D_ENABLE 0x01 116 #define UAC_3D_SPACE 0x02 117 118 /* A.10.3.4 Reverberation Processing Unit Control Selectors */ 119 #define UAC_REVERB_ENABLE 0x01 120 #define UAC_REVERB_LEVEL 0x02 121 #define UAC_REVERB_TIME 0x03 122 #define UAC_REVERB_FEEDBACK 0x04 123 124 /* A.10.3.5 Chorus Processing Unit Control Selectors */ 125 #define UAC_CHORUS_ENABLE 0x01 126 #define UAC_CHORUS_LEVEL 0x02 127 #define UAC_CHORUS_RATE 0x03 128 #define UAC_CHORUS_DEPTH 0x04 129 130 /* A.10.3.6 Dynamic Range Compressor Unit Control Selectors */ 131 #define UAC_DCR_ENABLE 0x01 132 #define UAC_DCR_RATE 0x02 133 #define UAC_DCR_MAXAMPL 0x03 134 #define UAC_DCR_THRESHOLD 0x04 135 #define UAC_DCR_ATTACK_TIME 0x05 136 #define UAC_DCR_RELEASE_TIME 0x06 137 138 /* A.10.4 Extension Unit Control Selectors */ 139 #define UAC_XU_ENABLE 0x01 140 141 /* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */ 142 #define UAC_MS_HEADER 0x01 143 #define UAC_MIDI_IN_JACK 0x02 144 #define UAC_MIDI_OUT_JACK 0x03 145 146 /* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */ 147 #define UAC_MS_GENERAL 0x01 148 149 /* Terminals - 2.1 USB Terminal Types */ 150 #define UAC_TERMINAL_UNDEFINED 0x100 151 #define UAC_TERMINAL_STREAMING 0x101 152 #define UAC_TERMINAL_VENDOR_SPEC 0x1FF 153 154 /* Terminal Control Selectors */ 155 /* 4.3.2 Class-Specific AC Interface Descriptor */ 156 struct uac1_ac_header_descriptor { 157 __u8 bLength; /* 8 + n */ 158 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 159 __u8 bDescriptorSubtype; /* UAC_MS_HEADER */ 160 __le16 bcdADC; /* 0x0100 */ 161 __le16 wTotalLength; /* includes Unit and Terminal desc. */ 162 __u8 bInCollection; /* n */ 163 __u8 baInterfaceNr[]; /* [n] */ 164 } __attribute__ ((packed)); 165 166 #define UAC_DT_AC_HEADER_SIZE(n) (8 + (n)) 167 168 /* As above, but more useful for defining your own descriptors: */ 169 #define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n) \ 170 struct uac1_ac_header_descriptor_##n { \ 171 __u8 bLength; \ 172 __u8 bDescriptorType; \ 173 __u8 bDescriptorSubtype; \ 174 __le16 bcdADC; \ 175 __le16 wTotalLength; \ 176 __u8 bInCollection; \ 177 __u8 baInterfaceNr[n]; \ 178 } __attribute__ ((packed)) 179 180 /* 4.3.2.1 Input Terminal Descriptor */ 181 struct uac_input_terminal_descriptor { 182 __u8 bLength; /* in bytes: 12 */ 183 __u8 bDescriptorType; /* CS_INTERFACE descriptor type */ 184 __u8 bDescriptorSubtype; /* INPUT_TERMINAL descriptor subtype */ 185 __u8 bTerminalID; /* Constant uniquely terminal ID */ 186 __le16 wTerminalType; /* USB Audio Terminal Types */ 187 __u8 bAssocTerminal; /* ID of the Output Terminal associated */ 188 __u8 bNrChannels; /* Number of logical output channels */ 189 __le16 wChannelConfig; 190 __u8 iChannelNames; 191 __u8 iTerminal; 192 } __attribute__ ((packed)); 193 194 #define UAC_DT_INPUT_TERMINAL_SIZE 12 195 196 /* Terminals - 2.2 Input Terminal Types */ 197 #define UAC_INPUT_TERMINAL_UNDEFINED 0x200 198 #define UAC_INPUT_TERMINAL_MICROPHONE 0x201 199 #define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202 200 #define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203 201 #define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204 202 #define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205 203 #define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206 204 205 /* Terminals - control selectors */ 206 207 #define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL 0x01 208 209 /* 4.3.2.2 Output Terminal Descriptor */ 210 struct uac1_output_terminal_descriptor { 211 __u8 bLength; /* in bytes: 9 */ 212 __u8 bDescriptorType; /* CS_INTERFACE descriptor type */ 213 __u8 bDescriptorSubtype; /* OUTPUT_TERMINAL descriptor subtype */ 214 __u8 bTerminalID; /* Constant uniquely terminal ID */ 215 __le16 wTerminalType; /* USB Audio Terminal Types */ 216 __u8 bAssocTerminal; /* ID of the Input Terminal associated */ 217 __u8 bSourceID; /* ID of the connected Unit or Terminal*/ 218 __u8 iTerminal; 219 } __attribute__ ((packed)); 220 221 #define UAC_DT_OUTPUT_TERMINAL_SIZE 9 222 223 /* Terminals - 2.3 Output Terminal Types */ 224 #define UAC_OUTPUT_TERMINAL_UNDEFINED 0x300 225 #define UAC_OUTPUT_TERMINAL_SPEAKER 0x301 226 #define UAC_OUTPUT_TERMINAL_HEADPHONES 0x302 227 #define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303 228 #define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304 229 #define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305 230 #define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306 231 #define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307 232 233 /* Set bControlSize = 2 as default setting */ 234 #define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2) 235 236 /* As above, but more useful for defining your own descriptors: */ 237 #define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \ 238 struct uac_feature_unit_descriptor_##ch { \ 239 __u8 bLength; \ 240 __u8 bDescriptorType; \ 241 __u8 bDescriptorSubtype; \ 242 __u8 bUnitID; \ 243 __u8 bSourceID; \ 244 __u8 bControlSize; \ 245 __le16 bmaControls[ch + 1]; \ 246 __u8 iFeature; \ 247 } __attribute__ ((packed)) 248 249 /* 4.3.2.3 Mixer Unit Descriptor */ 250 struct uac_mixer_unit_descriptor { 251 __u8 bLength; 252 __u8 bDescriptorType; 253 __u8 bDescriptorSubtype; 254 __u8 bUnitID; 255 __u8 bNrInPins; 256 __u8 baSourceID[]; 257 } __attribute__ ((packed)); 258 259 static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc) 260 { 261 return desc->baSourceID[desc->bNrInPins]; 262 } 263 264 static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc, 265 int protocol) 266 { 267 if (protocol == UAC_VERSION_1) 268 return (desc->baSourceID[desc->bNrInPins + 2] << 8) | 269 desc->baSourceID[desc->bNrInPins + 1]; 270 else 271 return (desc->baSourceID[desc->bNrInPins + 4] << 24) | 272 (desc->baSourceID[desc->bNrInPins + 3] << 16) | 273 (desc->baSourceID[desc->bNrInPins + 2] << 8) | 274 (desc->baSourceID[desc->bNrInPins + 1]); 275 } 276 277 static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc, 278 int protocol) 279 { 280 return (protocol == UAC_VERSION_1) ? 281 desc->baSourceID[desc->bNrInPins + 3] : 282 desc->baSourceID[desc->bNrInPins + 5]; 283 } 284 285 static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc, 286 int protocol) 287 { 288 switch (protocol) { 289 case UAC_VERSION_1: 290 return &desc->baSourceID[desc->bNrInPins + 4]; 291 case UAC_VERSION_2: 292 return &desc->baSourceID[desc->bNrInPins + 6]; 293 case UAC_VERSION_3: 294 return &desc->baSourceID[desc->bNrInPins + 2]; 295 default: 296 return NULL; 297 } 298 } 299 300 static inline __u16 uac3_mixer_unit_wClusterDescrID(struct uac_mixer_unit_descriptor *desc) 301 { 302 return (desc->baSourceID[desc->bNrInPins + 1] << 8) | 303 desc->baSourceID[desc->bNrInPins]; 304 } 305 306 static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc) 307 { 308 __u8 *raw = (__u8 *) desc; 309 return raw[desc->bLength - 1]; 310 } 311 312 /* 4.3.2.4 Selector Unit Descriptor */ 313 struct uac_selector_unit_descriptor { 314 __u8 bLength; 315 __u8 bDescriptorType; 316 __u8 bDescriptorSubtype; 317 __u8 bUintID; 318 __u8 bNrInPins; 319 __u8 baSourceID[]; 320 } __attribute__ ((packed)); 321 322 static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc) 323 { 324 __u8 *raw = (__u8 *) desc; 325 return raw[desc->bLength - 1]; 326 } 327 328 /* 4.3.2.5 Feature Unit Descriptor */ 329 struct uac_feature_unit_descriptor { 330 __u8 bLength; 331 __u8 bDescriptorType; 332 __u8 bDescriptorSubtype; 333 __u8 bUnitID; 334 __u8 bSourceID; 335 __u8 bControlSize; 336 __u8 bmaControls[0]; /* variable length */ 337 } __attribute__((packed)); 338 339 static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc) 340 { 341 __u8 *raw = (__u8 *) desc; 342 return raw[desc->bLength - 1]; 343 } 344 345 /* 4.3.2.6 Processing Unit Descriptors */ 346 struct uac_processing_unit_descriptor { 347 __u8 bLength; 348 __u8 bDescriptorType; 349 __u8 bDescriptorSubtype; 350 __u8 bUnitID; 351 __le16 wProcessType; 352 __u8 bNrInPins; 353 __u8 baSourceID[]; 354 } __attribute__ ((packed)); 355 356 static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc) 357 { 358 return desc->baSourceID[desc->bNrInPins]; 359 } 360 361 static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc, 362 int protocol) 363 { 364 if (protocol == UAC_VERSION_1) 365 return (desc->baSourceID[desc->bNrInPins + 2] << 8) | 366 desc->baSourceID[desc->bNrInPins + 1]; 367 else 368 return (desc->baSourceID[desc->bNrInPins + 4] << 24) | 369 (desc->baSourceID[desc->bNrInPins + 3] << 16) | 370 (desc->baSourceID[desc->bNrInPins + 2] << 8) | 371 (desc->baSourceID[desc->bNrInPins + 1]); 372 } 373 374 static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc, 375 int protocol) 376 { 377 return (protocol == UAC_VERSION_1) ? 378 desc->baSourceID[desc->bNrInPins + 3] : 379 desc->baSourceID[desc->bNrInPins + 5]; 380 } 381 382 static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc, 383 int protocol) 384 { 385 return (protocol == UAC_VERSION_1) ? 386 desc->baSourceID[desc->bNrInPins + 4] : 387 2; /* in UAC2, this value is constant */ 388 } 389 390 static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc, 391 int protocol) 392 { 393 return (protocol == UAC_VERSION_1) ? 394 &desc->baSourceID[desc->bNrInPins + 5] : 395 &desc->baSourceID[desc->bNrInPins + 6]; 396 } 397 398 static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc, 399 int protocol) 400 { 401 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol); 402 return *(uac_processing_unit_bmControls(desc, protocol) 403 + control_size); 404 } 405 406 static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc, 407 int protocol) 408 { 409 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol); 410 return uac_processing_unit_bmControls(desc, protocol) 411 + control_size + 1; 412 } 413 414 /* 4.5.2 Class-Specific AS Interface Descriptor */ 415 struct uac1_as_header_descriptor { 416 __u8 bLength; /* in bytes: 7 */ 417 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 418 __u8 bDescriptorSubtype; /* AS_GENERAL */ 419 __u8 bTerminalLink; /* Terminal ID of connected Terminal */ 420 __u8 bDelay; /* Delay introduced by the data path */ 421 __le16 wFormatTag; /* The Audio Data Format */ 422 } __attribute__ ((packed)); 423 424 #define UAC_DT_AS_HEADER_SIZE 7 425 426 /* Formats - A.1.1 Audio Data Format Type I Codes */ 427 #define UAC_FORMAT_TYPE_I_UNDEFINED 0x0 428 #define UAC_FORMAT_TYPE_I_PCM 0x1 429 #define UAC_FORMAT_TYPE_I_PCM8 0x2 430 #define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3 431 #define UAC_FORMAT_TYPE_I_ALAW 0x4 432 #define UAC_FORMAT_TYPE_I_MULAW 0x5 433 434 struct uac_format_type_i_continuous_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 tLowerSamFreq[3]; 444 __u8 tUpperSamFreq[3]; 445 } __attribute__ ((packed)); 446 447 #define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14 448 449 struct uac_format_type_i_discrete_descriptor { 450 __u8 bLength; /* in bytes: 8 + (ns * 3) */ 451 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ 452 __u8 bDescriptorSubtype; /* FORMAT_TYPE */ 453 __u8 bFormatType; /* FORMAT_TYPE_1 */ 454 __u8 bNrChannels; /* physical channels in the stream */ 455 __u8 bSubframeSize; /* */ 456 __u8 bBitResolution; 457 __u8 bSamFreqType; 458 __u8 tSamFreq[][3]; 459 } __attribute__ ((packed)); 460 461 #define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \ 462 struct uac_format_type_i_discrete_descriptor_##n { \ 463 __u8 bLength; \ 464 __u8 bDescriptorType; \ 465 __u8 bDescriptorSubtype; \ 466 __u8 bFormatType; \ 467 __u8 bNrChannels; \ 468 __u8 bSubframeSize; \ 469 __u8 bBitResolution; \ 470 __u8 bSamFreqType; \ 471 __u8 tSamFreq[n][3]; \ 472 } __attribute__ ((packed)) 473 474 #define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3)) 475 476 struct uac_format_type_i_ext_descriptor { 477 __u8 bLength; 478 __u8 bDescriptorType; 479 __u8 bDescriptorSubtype; 480 __u8 bFormatType; 481 __u8 bSubslotSize; 482 __u8 bBitResolution; 483 __u8 bHeaderLength; 484 __u8 bControlSize; 485 __u8 bSideBandProtocol; 486 } __attribute__((packed)); 487 488 /* Formats - Audio Data Format Type I Codes */ 489 490 #define UAC_FORMAT_TYPE_II_MPEG 0x1001 491 #define UAC_FORMAT_TYPE_II_AC3 0x1002 492 493 struct uac_format_type_ii_discrete_descriptor { 494 __u8 bLength; 495 __u8 bDescriptorType; 496 __u8 bDescriptorSubtype; 497 __u8 bFormatType; 498 __le16 wMaxBitRate; 499 __le16 wSamplesPerFrame; 500 __u8 bSamFreqType; 501 __u8 tSamFreq[][3]; 502 } __attribute__((packed)); 503 504 struct uac_format_type_ii_ext_descriptor { 505 __u8 bLength; 506 __u8 bDescriptorType; 507 __u8 bDescriptorSubtype; 508 __u8 bFormatType; 509 __le16 wMaxBitRate; 510 __le16 wSamplesPerFrame; 511 __u8 bHeaderLength; 512 __u8 bSideBandProtocol; 513 } __attribute__((packed)); 514 515 /* type III */ 516 #define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001 517 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1 0x2002 518 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003 519 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT 0x2004 520 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS 0x2005 521 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS 0x2006 522 523 /* Formats - A.2 Format Type Codes */ 524 #define UAC_FORMAT_TYPE_UNDEFINED 0x0 525 #define UAC_FORMAT_TYPE_I 0x1 526 #define UAC_FORMAT_TYPE_II 0x2 527 #define UAC_FORMAT_TYPE_III 0x3 528 #define UAC_EXT_FORMAT_TYPE_I 0x81 529 #define UAC_EXT_FORMAT_TYPE_II 0x82 530 #define UAC_EXT_FORMAT_TYPE_III 0x83 531 532 struct uac_iso_endpoint_descriptor { 533 __u8 bLength; /* in bytes: 7 */ 534 __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */ 535 __u8 bDescriptorSubtype; /* EP_GENERAL */ 536 __u8 bmAttributes; 537 __u8 bLockDelayUnits; 538 __le16 wLockDelay; 539 } __attribute__((packed)); 540 #define UAC_ISO_ENDPOINT_DESC_SIZE 7 541 542 #define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01 543 #define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02 544 #define UAC_EP_CS_ATTR_FILL_MAX 0x80 545 546 /* status word format (3.7.1.1) */ 547 548 #define UAC1_STATUS_TYPE_ORIG_MASK 0x0f 549 #define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF 0x0 550 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF 0x1 551 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP 0x2 552 553 #define UAC1_STATUS_TYPE_IRQ_PENDING (1 << 7) 554 #define UAC1_STATUS_TYPE_MEM_CHANGED (1 << 6) 555 556 struct uac1_status_word { 557 __u8 bStatusType; 558 __u8 bOriginator; 559 } __attribute__((packed)); 560 561 562 #endif /* _UAPI__LINUX_USB_AUDIO_H */ 563