LXR linux/include/uapi/linux/usb/audio.h

   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 */
 154struct 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)                     \
 168struct 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 */
 179struct 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 */
 208struct 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)                 \
 236struct 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 */
 248struct 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
 257static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)
 258{
 259        return desc->baSourceID[desc->bNrInPins];
 260}
 261
 262static 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
 275static 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
 283static 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
 291static 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 */
 298struct 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
 307static 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 */
 314struct 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
 324static 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 */
 331struct 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
 341static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)
 342{
 343        return desc->baSourceID[desc->bNrInPins];
 344}
 345
 346static 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
 359static 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
 367static 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
 375static 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
 383static 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
 391static 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 */
 400struct 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
 419struct 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
 434struct 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)              \
 447struct 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
 461struct 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
 478struct 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
 489struct 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
 517struct 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
 541struct uac1_status_word {
 542        __u8 bStatusType;
 543        __u8 bOriginator;
 544} __attribute__((packed));
 545
 546
 547#endif /* _UAPI__LINUX_USB_AUDIO_H */
 548