639 lines · c
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 Innovation7 * Ben Williamson <ben.williamson@greyinnovation.com>8 *9 * This software is distributed under the terms of the GNU General Public10 * License ("GPL") version 2, as published by the Free Software Foundation.11 *12 * This file holds USB constants and structures defined13 * 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.pdf17 *18 * Types and defines in this file are either specific to version 1.0 of19 * this standard or common for newer versions.20 */21 22#ifndef _UAPI__LINUX_USB_AUDIO_H23#define _UAPI__LINUX_USB_AUDIO_H24 25#include <linux/types.h>26 27/* bInterfaceProtocol values to denote the version of the standard used */28#define UAC_VERSION_1 0x0029#define UAC_VERSION_2 0x2030#define UAC_VERSION_3 0x3031 32/* A.2 Audio Interface Subclass Codes */33#define USB_SUBCLASS_AUDIOCONTROL 0x0134#define USB_SUBCLASS_AUDIOSTREAMING 0x0235#define USB_SUBCLASS_MIDISTREAMING 0x0336 37/* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */38#define UAC_HEADER 0x0139#define UAC_INPUT_TERMINAL 0x0240#define UAC_OUTPUT_TERMINAL 0x0341#define UAC_MIXER_UNIT 0x0442#define UAC_SELECTOR_UNIT 0x0543#define UAC_FEATURE_UNIT 0x0644#define UAC1_PROCESSING_UNIT 0x0745#define UAC1_EXTENSION_UNIT 0x0846 47/* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */48#define UAC_AS_GENERAL 0x0149#define UAC_FORMAT_TYPE 0x0250#define UAC_FORMAT_SPECIFIC 0x0351 52/* A.7 Processing Unit Process Types */53#define UAC_PROCESS_UNDEFINED 0x0054#define UAC_PROCESS_UP_DOWNMIX 0x0155#define UAC_PROCESS_DOLBY_PROLOGIC 0x0256#define UAC_PROCESS_STEREO_EXTENDER 0x0357#define UAC_PROCESS_REVERB 0x0458#define UAC_PROCESS_CHORUS 0x0559#define UAC_PROCESS_DYN_RANGE_COMP 0x0660 61/* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */62#define UAC_EP_GENERAL 0x0163 64/* A.9 Audio Class-Specific Request Codes */65#define UAC_SET_ 0x0066#define UAC_GET_ 0x8067 68#define UAC__CUR 0x169#define UAC__MIN 0x270#define UAC__MAX 0x371#define UAC__RES 0x472#define UAC__MEM 0x573 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 0xff86 87/* A.10 Control Selector Codes */88 89/* A.10.1 Terminal Control Selectors */90#define UAC_TERM_COPY_PROTECT 0x0191 92/* A.10.2 Feature Unit Control Selectors */93#define UAC_FU_MUTE 0x0194#define UAC_FU_VOLUME 0x0295#define UAC_FU_BASS 0x0396#define UAC_FU_MID 0x0497#define UAC_FU_TREBLE 0x0598#define UAC_FU_GRAPHIC_EQUALIZER 0x0699#define UAC_FU_AUTOMATIC_GAIN 0x07100#define UAC_FU_DELAY 0x08101#define UAC_FU_BASS_BOOST 0x09102#define UAC_FU_LOUDNESS 0x0a103 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 0x01108#define UAC_UD_MODE_SELECT 0x02109 110/* A.10.3.2 Dolby Prologic (tm) Processing Unit Controls Selectors */111#define UAC_DP_ENABLE 0x01112#define UAC_DP_MODE_SELECT 0x02113 114/* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */115#define UAC_3D_ENABLE 0x01116#define UAC_3D_SPACE 0x02117 118/* A.10.3.4 Reverberation Processing Unit Control Selectors */119#define UAC_REVERB_ENABLE 0x01120#define UAC_REVERB_LEVEL 0x02121#define UAC_REVERB_TIME 0x03122#define UAC_REVERB_FEEDBACK 0x04123 124/* A.10.3.5 Chorus Processing Unit Control Selectors */125#define UAC_CHORUS_ENABLE 0x01126#define UAC_CHORUS_LEVEL 0x02127#define UAC_CHORUS_RATE 0x03128#define UAC_CHORUS_DEPTH 0x04129 130/* A.10.3.6 Dynamic Range Compressor Unit Control Selectors */131#define UAC_DCR_ENABLE 0x01132#define UAC_DCR_RATE 0x02133#define UAC_DCR_MAXAMPL 0x03134#define UAC_DCR_THRESHOLD 0x04135#define UAC_DCR_ATTACK_TIME 0x05136#define UAC_DCR_RELEASE_TIME 0x06137 138/* A.10.4 Extension Unit Control Selectors */139#define UAC_XU_ENABLE 0x01140 141/* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */142#define UAC_MS_HEADER 0x01143#define UAC_MIDI_IN_JACK 0x02144#define UAC_MIDI_OUT_JACK 0x03145 146/* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */147#define UAC_MS_GENERAL 0x01148 149/* Terminals - 2.1 USB Terminal Types */150#define UAC_TERMINAL_UNDEFINED 0x100151#define UAC_TERMINAL_STREAMING 0x101152#define UAC_TERMINAL_VENDOR_SPEC 0x1FF153 154/* Terminal Control Selectors */155/* 4.3.2 Class-Specific AC Interface Descriptor */156struct 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) \170struct 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 */181struct 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 12195 196/* Terminals - 2.2 Input Terminal Types */197#define UAC_INPUT_TERMINAL_UNDEFINED 0x200198#define UAC_INPUT_TERMINAL_MICROPHONE 0x201199#define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202200#define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203201#define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204202#define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205203#define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206204 205/* Terminals - control selectors */206 207#define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL 0x01208 209/* 4.3.2.2 Output Terminal Descriptor */210struct 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 9222 223/* Terminals - 2.3 Output Terminal Types */224#define UAC_OUTPUT_TERMINAL_UNDEFINED 0x300225#define UAC_OUTPUT_TERMINAL_SPEAKER 0x301226#define UAC_OUTPUT_TERMINAL_HEADPHONES 0x302227#define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303228#define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304229#define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305230#define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306231#define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307232 233/* Terminals - 2.4 Bi-directional Terminal Types */234#define UAC_BIDIR_TERMINAL_UNDEFINED 0x400235#define UAC_BIDIR_TERMINAL_HANDSET 0x401236#define UAC_BIDIR_TERMINAL_HEADSET 0x402237#define UAC_BIDIR_TERMINAL_SPEAKER_PHONE 0x403238#define UAC_BIDIR_TERMINAL_ECHO_SUPPRESSING 0x404239#define UAC_BIDIR_TERMINAL_ECHO_CANCELING 0x405240 241/* Set bControlSize = 2 as default setting */242#define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2)243 244/* As above, but more useful for defining your own descriptors: */245#define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \246struct uac_feature_unit_descriptor_##ch { \247 __u8 bLength; \248 __u8 bDescriptorType; \249 __u8 bDescriptorSubtype; \250 __u8 bUnitID; \251 __u8 bSourceID; \252 __u8 bControlSize; \253 __le16 bmaControls[ch + 1]; \254 __u8 iFeature; \255} __attribute__ ((packed))256 257/* 4.3.2.3 Mixer Unit Descriptor */258struct uac_mixer_unit_descriptor {259 __u8 bLength;260 __u8 bDescriptorType;261 __u8 bDescriptorSubtype;262 __u8 bUnitID;263 __u8 bNrInPins;264 __u8 baSourceID[];265} __attribute__ ((packed));266 267static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)268{269 return desc->baSourceID[desc->bNrInPins];270}271 272static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc,273 int protocol)274{275 if (protocol == UAC_VERSION_1)276 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |277 desc->baSourceID[desc->bNrInPins + 1];278 else279 return (desc->baSourceID[desc->bNrInPins + 4] << 24) |280 (desc->baSourceID[desc->bNrInPins + 3] << 16) |281 (desc->baSourceID[desc->bNrInPins + 2] << 8) |282 (desc->baSourceID[desc->bNrInPins + 1]);283}284 285static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc,286 int protocol)287{288 return (protocol == UAC_VERSION_1) ?289 desc->baSourceID[desc->bNrInPins + 3] :290 desc->baSourceID[desc->bNrInPins + 5];291}292 293static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc,294 int protocol)295{296 switch (protocol) {297 case UAC_VERSION_1:298 return &desc->baSourceID[desc->bNrInPins + 4];299 case UAC_VERSION_2:300 return &desc->baSourceID[desc->bNrInPins + 6];301 case UAC_VERSION_3:302 return &desc->baSourceID[desc->bNrInPins + 2];303 default:304 return NULL;305 }306}307 308static inline __u16 uac3_mixer_unit_wClusterDescrID(struct uac_mixer_unit_descriptor *desc)309{310 return (desc->baSourceID[desc->bNrInPins + 1] << 8) |311 desc->baSourceID[desc->bNrInPins];312}313 314static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc)315{316 __u8 *raw = (__u8 *) desc;317 return raw[desc->bLength - 1];318}319 320/* 4.3.2.4 Selector Unit Descriptor */321struct uac_selector_unit_descriptor {322 __u8 bLength;323 __u8 bDescriptorType;324 __u8 bDescriptorSubtype;325 __u8 bUintID;326 __u8 bNrInPins;327 __u8 baSourceID[];328} __attribute__ ((packed));329 330static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)331{332 __u8 *raw = (__u8 *) desc;333 return raw[desc->bLength - 1];334}335 336/* 4.3.2.5 Feature Unit Descriptor */337struct uac_feature_unit_descriptor {338 __u8 bLength;339 __u8 bDescriptorType;340 __u8 bDescriptorSubtype;341 __u8 bUnitID;342 __u8 bSourceID;343 __u8 bControlSize;344 __u8 bmaControls[]; /* variable length */345} __attribute__((packed));346 347static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc)348{349 __u8 *raw = (__u8 *) desc;350 return raw[desc->bLength - 1];351}352 353/* 4.3.2.6 Processing Unit Descriptors */354struct uac_processing_unit_descriptor {355 __u8 bLength;356 __u8 bDescriptorType;357 __u8 bDescriptorSubtype;358 __u8 bUnitID;359 __le16 wProcessType;360 __u8 bNrInPins;361 __u8 baSourceID[];362} __attribute__ ((packed));363 364static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)365{366 return desc->baSourceID[desc->bNrInPins];367}368 369static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc,370 int protocol)371{372 if (protocol == UAC_VERSION_1)373 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |374 desc->baSourceID[desc->bNrInPins + 1];375 else376 return (desc->baSourceID[desc->bNrInPins + 4] << 24) |377 (desc->baSourceID[desc->bNrInPins + 3] << 16) |378 (desc->baSourceID[desc->bNrInPins + 2] << 8) |379 (desc->baSourceID[desc->bNrInPins + 1]);380}381 382static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc,383 int protocol)384{385 return (protocol == UAC_VERSION_1) ?386 desc->baSourceID[desc->bNrInPins + 3] :387 desc->baSourceID[desc->bNrInPins + 5];388}389 390static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc,391 int protocol)392{393 switch (protocol) {394 case UAC_VERSION_1:395 return desc->baSourceID[desc->bNrInPins + 4];396 case UAC_VERSION_2:397 return 2; /* in UAC2, this value is constant */398 case UAC_VERSION_3:399 return 4; /* in UAC3, this value is constant */400 default:401 return 1;402 }403}404 405static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc,406 int protocol)407{408 switch (protocol) {409 case UAC_VERSION_1:410 return &desc->baSourceID[desc->bNrInPins + 5];411 case UAC_VERSION_2:412 return &desc->baSourceID[desc->bNrInPins + 6];413 case UAC_VERSION_3:414 return &desc->baSourceID[desc->bNrInPins + 2];415 default:416 return NULL;417 }418}419 420static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc,421 int protocol)422{423 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);424 425 switch (protocol) {426 case UAC_VERSION_1:427 case UAC_VERSION_2:428 default:429 return *(uac_processing_unit_bmControls(desc, protocol)430 + control_size);431 case UAC_VERSION_3:432 return 0; /* UAC3 does not have this field */433 }434}435 436static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,437 int protocol)438{439 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);440 441 switch (protocol) {442 case UAC_VERSION_1:443 case UAC_VERSION_2:444 default:445 return uac_processing_unit_bmControls(desc, protocol)446 + control_size + 1;447 case UAC_VERSION_3:448 return uac_processing_unit_bmControls(desc, protocol)449 + control_size;450 }451}452 453/*454 * Extension Unit (XU) has almost compatible layout with Processing Unit, but455 * on UAC2, it has a different bmControls size (bControlSize); it's 1 byte for456 * XU while 2 bytes for PU. The last iExtension field is a one-byte index as457 * well as iProcessing field of PU.458 */459static inline __u8 uac_extension_unit_bControlSize(struct uac_processing_unit_descriptor *desc,460 int protocol)461{462 switch (protocol) {463 case UAC_VERSION_1:464 return desc->baSourceID[desc->bNrInPins + 4];465 case UAC_VERSION_2:466 return 1; /* in UAC2, this value is constant */467 case UAC_VERSION_3:468 return 4; /* in UAC3, this value is constant */469 default:470 return 1;471 }472}473 474static inline __u8 uac_extension_unit_iExtension(struct uac_processing_unit_descriptor *desc,475 int protocol)476{477 __u8 control_size = uac_extension_unit_bControlSize(desc, protocol);478 479 switch (protocol) {480 case UAC_VERSION_1:481 case UAC_VERSION_2:482 default:483 return *(uac_processing_unit_bmControls(desc, protocol)484 + control_size);485 case UAC_VERSION_3:486 return 0; /* UAC3 does not have this field */487 }488}489 490/* 4.5.2 Class-Specific AS Interface Descriptor */491struct uac1_as_header_descriptor {492 __u8 bLength; /* in bytes: 7 */493 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */494 __u8 bDescriptorSubtype; /* AS_GENERAL */495 __u8 bTerminalLink; /* Terminal ID of connected Terminal */496 __u8 bDelay; /* Delay introduced by the data path */497 __le16 wFormatTag; /* The Audio Data Format */498} __attribute__ ((packed));499 500#define UAC_DT_AS_HEADER_SIZE 7501 502/* Formats - A.1.1 Audio Data Format Type I Codes */503#define UAC_FORMAT_TYPE_I_UNDEFINED 0x0504#define UAC_FORMAT_TYPE_I_PCM 0x1505#define UAC_FORMAT_TYPE_I_PCM8 0x2506#define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3507#define UAC_FORMAT_TYPE_I_ALAW 0x4508#define UAC_FORMAT_TYPE_I_MULAW 0x5509 510struct uac_format_type_i_continuous_descriptor {511 __u8 bLength; /* in bytes: 8 + (ns * 3) */512 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */513 __u8 bDescriptorSubtype; /* FORMAT_TYPE */514 __u8 bFormatType; /* FORMAT_TYPE_1 */515 __u8 bNrChannels; /* physical channels in the stream */516 __u8 bSubframeSize; /* */517 __u8 bBitResolution;518 __u8 bSamFreqType;519 __u8 tLowerSamFreq[3];520 __u8 tUpperSamFreq[3];521} __attribute__ ((packed));522 523#define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14524 525struct uac_format_type_i_discrete_descriptor {526 __u8 bLength; /* in bytes: 8 + (ns * 3) */527 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */528 __u8 bDescriptorSubtype; /* FORMAT_TYPE */529 __u8 bFormatType; /* FORMAT_TYPE_1 */530 __u8 bNrChannels; /* physical channels in the stream */531 __u8 bSubframeSize; /* */532 __u8 bBitResolution;533 __u8 bSamFreqType;534 __u8 tSamFreq[][3];535} __attribute__ ((packed));536 537#define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \538struct uac_format_type_i_discrete_descriptor_##n { \539 __u8 bLength; \540 __u8 bDescriptorType; \541 __u8 bDescriptorSubtype; \542 __u8 bFormatType; \543 __u8 bNrChannels; \544 __u8 bSubframeSize; \545 __u8 bBitResolution; \546 __u8 bSamFreqType; \547 __u8 tSamFreq[n][3]; \548} __attribute__ ((packed))549 550#define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))551 552struct uac_format_type_i_ext_descriptor {553 __u8 bLength;554 __u8 bDescriptorType;555 __u8 bDescriptorSubtype;556 __u8 bFormatType;557 __u8 bSubslotSize;558 __u8 bBitResolution;559 __u8 bHeaderLength;560 __u8 bControlSize;561 __u8 bSideBandProtocol;562} __attribute__((packed));563 564/* Formats - Audio Data Format Type I Codes */565 566#define UAC_FORMAT_TYPE_II_MPEG 0x1001567#define UAC_FORMAT_TYPE_II_AC3 0x1002568 569struct uac_format_type_ii_discrete_descriptor {570 __u8 bLength;571 __u8 bDescriptorType;572 __u8 bDescriptorSubtype;573 __u8 bFormatType;574 __le16 wMaxBitRate;575 __le16 wSamplesPerFrame;576 __u8 bSamFreqType;577 __u8 tSamFreq[][3];578} __attribute__((packed));579 580struct uac_format_type_ii_ext_descriptor {581 __u8 bLength;582 __u8 bDescriptorType;583 __u8 bDescriptorSubtype;584 __u8 bFormatType;585 __le16 wMaxBitRate;586 __le16 wSamplesPerFrame;587 __u8 bHeaderLength;588 __u8 bSideBandProtocol;589} __attribute__((packed));590 591/* type III */592#define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001593#define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1 0x2002594#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003595#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT 0x2004596#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS 0x2005597#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS 0x2006598 599/* Formats - A.2 Format Type Codes */600#define UAC_FORMAT_TYPE_UNDEFINED 0x0601#define UAC_FORMAT_TYPE_I 0x1602#define UAC_FORMAT_TYPE_II 0x2603#define UAC_FORMAT_TYPE_III 0x3604#define UAC_EXT_FORMAT_TYPE_I 0x81605#define UAC_EXT_FORMAT_TYPE_II 0x82606#define UAC_EXT_FORMAT_TYPE_III 0x83607 608struct uac_iso_endpoint_descriptor {609 __u8 bLength; /* in bytes: 7 */610 __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */611 __u8 bDescriptorSubtype; /* EP_GENERAL */612 __u8 bmAttributes;613 __u8 bLockDelayUnits;614 __le16 wLockDelay;615} __attribute__((packed));616#define UAC_ISO_ENDPOINT_DESC_SIZE 7617 618#define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01619#define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02620#define UAC_EP_CS_ATTR_FILL_MAX 0x80621 622/* status word format (3.7.1.1) */623 624#define UAC1_STATUS_TYPE_ORIG_MASK 0x0f625#define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF 0x0626#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF 0x1627#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP 0x2628 629#define UAC1_STATUS_TYPE_IRQ_PENDING (1 << 7)630#define UAC1_STATUS_TYPE_MEM_CHANGED (1 << 6)631 632struct uac1_status_word {633 __u8 bStatusType;634 __u8 bOriginator;635} __attribute__((packed));636 637 638#endif /* _UAPI__LINUX_USB_AUDIO_H */639