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#ifndef _UAPI__LINUX_USB_AUDIO_H#define _UAPI__LINUX_USB_AUDIO_H
#include <linux/types.h>
/* bInterfaceProtocol values to denote the version of the standard used */#define UAC_VERSION_1 0x00#define UAC_VERSION_2 0x20#define UAC_VERSION_3 0x30
/* A.2 Audio Interface Subclass Codes */#define USB_SUBCLASS_AUDIOCONTROL 0x01#define USB_SUBCLASS_AUDIOSTREAMING 0x02#define USB_SUBCLASS_MIDISTREAMING 0x03
/* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */#define UAC_HEADER 0x01#define UAC_INPUT_TERMINAL 0x02#define UAC_OUTPUT_TERMINAL 0x03#define UAC_MIXER_UNIT 0x04#define UAC_SELECTOR_UNIT 0x05#define UAC_FEATURE_UNIT 0x06#define UAC1_PROCESSING_UNIT 0x07#define UAC1_EXTENSION_UNIT 0x08
/* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */#define UAC_AS_GENERAL 0x01#define UAC_FORMAT_TYPE 0x02#define UAC_FORMAT_SPECIFIC 0x03
/* A.7 Processing Unit Process Types */#define UAC_PROCESS_UNDEFINED 0x00#define UAC_PROCESS_UP_DOWNMIX 0x01#define UAC_PROCESS_DOLBY_PROLOGIC 0x02#define UAC_PROCESS_STEREO_EXTENDER 0x03#define UAC_PROCESS_REVERB 0x04#define UAC_PROCESS_CHORUS 0x05#define UAC_PROCESS_DYN_RANGE_COMP 0x06
/* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */#define UAC_EP_GENERAL 0x01
/* A.9 Audio Class-Specific Request Codes */#define UAC_SET_ 0x00#define UAC_GET_ 0x80
#define UAC__CUR 0x1#define UAC__MIN 0x2#define UAC__MAX 0x3#define UAC__RES 0x4#define UAC__MEM 0x5
#define UAC_SET_CUR (UAC_SET_ | UAC__CUR)#define UAC_GET_CUR (UAC_GET_ | UAC__CUR)#define UAC_SET_MIN (UAC_SET_ | UAC__MIN)#define UAC_GET_MIN (UAC_GET_ | UAC__MIN)#define UAC_SET_MAX (UAC_SET_ | UAC__MAX)#define UAC_GET_MAX (UAC_GET_ | UAC__MAX)#define UAC_SET_RES (UAC_SET_ | UAC__RES)#define UAC_GET_RES (UAC_GET_ | UAC__RES)#define UAC_SET_MEM (UAC_SET_ | UAC__MEM)#define UAC_GET_MEM (UAC_GET_ | UAC__MEM)
#define UAC_GET_STAT 0xff
/* A.10 Control Selector Codes */
/* A.10.1 Terminal Control Selectors */#define UAC_TERM_COPY_PROTECT 0x01
/* A.10.2 Feature Unit Control Selectors */#define UAC_FU_MUTE 0x01#define UAC_FU_VOLUME 0x02#define UAC_FU_BASS 0x03#define UAC_FU_MID 0x04#define UAC_FU_TREBLE 0x05#define UAC_FU_GRAPHIC_EQUALIZER 0x06#define UAC_FU_AUTOMATIC_GAIN 0x07#define UAC_FU_DELAY 0x08#define UAC_FU_BASS_BOOST 0x09#define UAC_FU_LOUDNESS 0x0a
#define UAC_CONTROL_BIT(CS) (1 << ((CS) - 1))
/* A.10.3.1 Up/Down-mix Processing Unit Controls Selectors */#define UAC_UD_ENABLE 0x01#define UAC_UD_MODE_SELECT 0x02
/* A.10.3.2 Dolby Prologic (tm) Processing Unit Controls Selectors */#define UAC_DP_ENABLE 0x01#define UAC_DP_MODE_SELECT 0x02
/* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */#define UAC_3D_ENABLE 0x01#define UAC_3D_SPACE 0x02
/* A.10.3.4 Reverberation Processing Unit Control Selectors */#define UAC_REVERB_ENABLE 0x01#define UAC_REVERB_LEVEL 0x02#define UAC_REVERB_TIME 0x03#define UAC_REVERB_FEEDBACK 0x04
/* A.10.3.5 Chorus Processing Unit Control Selectors */#define UAC_CHORUS_ENABLE 0x01#define UAC_CHORUS_LEVEL 0x02#define UAC_CHORUS_RATE 0x03#define UAC_CHORUS_DEPTH 0x04
/* A.10.3.6 Dynamic Range Compressor Unit Control Selectors */#define UAC_DCR_ENABLE 0x01#define UAC_DCR_RATE 0x02#define UAC_DCR_MAXAMPL 0x03#define UAC_DCR_THRESHOLD 0x04#define UAC_DCR_ATTACK_TIME 0x05#define UAC_DCR_RELEASE_TIME 0x06
/* A.10.4 Extension Unit Control Selectors */#define UAC_XU_ENABLE 0x01
/* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */#define UAC_MS_HEADER 0x01#define UAC_MIDI_IN_JACK 0x02#define UAC_MIDI_OUT_JACK 0x03
/* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */#define UAC_MS_GENERAL 0x01
/* Terminals - 2.1 USB Terminal Types */#define UAC_TERMINAL_UNDEFINED 0x100#define UAC_TERMINAL_STREAMING 0x101#define UAC_TERMINAL_VENDOR_SPEC 0x1FF
/* Terminal Control Selectors *//* 4.3.2 Class-Specific AC Interface Descriptor */struct uac1_ac_header_descriptor { __u8 bLength; /* 8 + n */ __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ __u8 bDescriptorSubtype; /* UAC_MS_HEADER */ __le16 bcdADC; /* 0x0100 */ __le16 wTotalLength; /* includes Unit and Terminal desc. */ __u8 bInCollection; /* n */ __u8 baInterfaceNr[]; /* [n] */} __attribute__ ((packed));
#define UAC_DT_AC_HEADER_SIZE(n) (8 + (n))
/* As above, but more useful for defining your own descriptors: */#define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n) \struct uac1_ac_header_descriptor_##n { \ __u8 bLength; \ __u8 bDescriptorType; \ __u8 bDescriptorSubtype; \ __le16 bcdADC; \ __le16 wTotalLength; \ __u8 bInCollection; \ __u8 baInterfaceNr[n]; \} __attribute__ ((packed))
/* 4.3.2.1 Input Terminal Descriptor */struct uac_input_terminal_descriptor { __u8 bLength; /* in bytes: 12 */ __u8 bDescriptorType; /* CS_INTERFACE descriptor type */ __u8 bDescriptorSubtype; /* INPUT_TERMINAL descriptor subtype */ __u8 bTerminalID; /* Constant uniquely terminal ID */ __le16 wTerminalType; /* USB Audio Terminal Types */ __u8 bAssocTerminal; /* ID of the Output Terminal associated */ __u8 bNrChannels; /* Number of logical output channels */ __le16 wChannelConfig; __u8 iChannelNames; __u8 iTerminal;} __attribute__ ((packed));
#define UAC_DT_INPUT_TERMINAL_SIZE 12
/* Terminals - 2.2 Input Terminal Types */#define UAC_INPUT_TERMINAL_UNDEFINED 0x200#define UAC_INPUT_TERMINAL_MICROPHONE 0x201#define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202#define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203#define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204#define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205#define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206
/* Terminals - control selectors */
#define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL 0x01
/* 4.3.2.2 Output Terminal Descriptor */struct uac1_output_terminal_descriptor { __u8 bLength; /* in bytes: 9 */ __u8 bDescriptorType; /* CS_INTERFACE descriptor type */ __u8 bDescriptorSubtype; /* OUTPUT_TERMINAL descriptor subtype */ __u8 bTerminalID; /* Constant uniquely terminal ID */ __le16 wTerminalType; /* USB Audio Terminal Types */ __u8 bAssocTerminal; /* ID of the Input Terminal associated */ __u8 bSourceID; /* ID of the connected Unit or Terminal*/ __u8 iTerminal;} __attribute__ ((packed));
#define UAC_DT_OUTPUT_TERMINAL_SIZE 9
/* Terminals - 2.3 Output Terminal Types */#define UAC_OUTPUT_TERMINAL_UNDEFINED 0x300#define UAC_OUTPUT_TERMINAL_SPEAKER 0x301#define UAC_OUTPUT_TERMINAL_HEADPHONES 0x302#define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303#define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304#define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305#define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306#define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307
/* Terminals - 2.4 Bi-directional Terminal Types */#define UAC_BIDIR_TERMINAL_UNDEFINED 0x400#define UAC_BIDIR_TERMINAL_HANDSET 0x401#define UAC_BIDIR_TERMINAL_HEADSET 0x402#define UAC_BIDIR_TERMINAL_SPEAKER_PHONE 0x403#define UAC_BIDIR_TERMINAL_ECHO_SUPPRESSING 0x404#define UAC_BIDIR_TERMINAL_ECHO_CANCELING 0x405
/* Set bControlSize = 2 as default setting */#define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2)
/* As above, but more useful for defining your own descriptors: */#define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \struct uac_feature_unit_descriptor_##ch { \ __u8 bLength; \ __u8 bDescriptorType; \ __u8 bDescriptorSubtype; \ __u8 bUnitID; \ __u8 bSourceID; \ __u8 bControlSize; \ __le16 bmaControls[ch + 1]; \ __u8 iFeature; \} __attribute__ ((packed))
/* 4.3.2.3 Mixer Unit Descriptor */struct uac_mixer_unit_descriptor { __u8 bLength; __u8 bDescriptorType; __u8 bDescriptorSubtype; __u8 bUnitID; __u8 bNrInPins; __u8 baSourceID[];} __attribute__ ((packed));
static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc){ return desc->baSourceID[desc->bNrInPins];}
static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc, int protocol){ if (protocol == UAC_VERSION_1) return (desc->baSourceID[desc->bNrInPins + 2] << 8) | desc->baSourceID[desc->bNrInPins + 1]; else return (desc->baSourceID[desc->bNrInPins + 4] << 24) | (desc->baSourceID[desc->bNrInPins + 3] << 16) | (desc->baSourceID[desc->bNrInPins + 2] << 8) | (desc->baSourceID[desc->bNrInPins + 1]);}
static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc, int protocol){ return (protocol == UAC_VERSION_1) ? desc->baSourceID[desc->bNrInPins + 3] : desc->baSourceID[desc->bNrInPins + 5];}
static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc, int protocol){ switch (protocol) { case UAC_VERSION_1: return &desc->baSourceID[desc->bNrInPins + 4]; case UAC_VERSION_2: return &desc->baSourceID[desc->bNrInPins + 6]; case UAC_VERSION_3: return &desc->baSourceID[desc->bNrInPins + 2]; default: return NULL; }}
static inline __u16 uac3_mixer_unit_wClusterDescrID(struct uac_mixer_unit_descriptor *desc){ return (desc->baSourceID[desc->bNrInPins + 1] << 8) | desc->baSourceID[desc->bNrInPins];}
static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc){ __u8 *raw = (__u8 *) desc; return raw[desc->bLength - 1];}
/* 4.3.2.4 Selector Unit Descriptor */struct uac_selector_unit_descriptor { __u8 bLength; __u8 bDescriptorType; __u8 bDescriptorSubtype; __u8 bUintID; __u8 bNrInPins; __u8 baSourceID[];} __attribute__ ((packed));
static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc){ __u8 *raw = (__u8 *) desc; return raw[desc->bLength - 1];}
/* 4.3.2.5 Feature Unit Descriptor */struct uac_feature_unit_descriptor { __u8 bLength; __u8 bDescriptorType; __u8 bDescriptorSubtype; __u8 bUnitID; __u8 bSourceID; __u8 bControlSize; __u8 bmaControls[]; /* variable length */} __attribute__((packed));
static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc){ __u8 *raw = (__u8 *) desc; return raw[desc->bLength - 1];}
/* 4.3.2.6 Processing Unit Descriptors */struct uac_processing_unit_descriptor { __u8 bLength; __u8 bDescriptorType; __u8 bDescriptorSubtype; __u8 bUnitID; __le16 wProcessType; __u8 bNrInPins; __u8 baSourceID[];} __attribute__ ((packed));
static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc){ return desc->baSourceID[desc->bNrInPins];}
static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc, int protocol){ if (protocol == UAC_VERSION_1) return (desc->baSourceID[desc->bNrInPins + 2] << 8) | desc->baSourceID[desc->bNrInPins + 1]; else return (desc->baSourceID[desc->bNrInPins + 4] << 24) | (desc->baSourceID[desc->bNrInPins + 3] << 16) | (desc->baSourceID[desc->bNrInPins + 2] << 8) | (desc->baSourceID[desc->bNrInPins + 1]);}
static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc, int protocol){ return (protocol == UAC_VERSION_1) ? desc->baSourceID[desc->bNrInPins + 3] : desc->baSourceID[desc->bNrInPins + 5];}
static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc, int protocol){ switch (protocol) { case UAC_VERSION_1: return desc->baSourceID[desc->bNrInPins + 4]; case UAC_VERSION_2: return 2; /* in UAC2, this value is constant */ case UAC_VERSION_3: return 4; /* in UAC3, this value is constant */ default: return 1; }}
static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc, int protocol){ switch (protocol) { case UAC_VERSION_1: return &desc->baSourceID[desc->bNrInPins + 5]; case UAC_VERSION_2: return &desc->baSourceID[desc->bNrInPins + 6]; case UAC_VERSION_3: return &desc->baSourceID[desc->bNrInPins + 2]; default: return NULL; }}
static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc, int protocol){ __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
switch (protocol) { case UAC_VERSION_1: case UAC_VERSION_2: default: return *(uac_processing_unit_bmControls(desc, protocol) + control_size); case UAC_VERSION_3: return 0; /* UAC3 does not have this field */ }}
static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc, int protocol){ __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
switch (protocol) { case UAC_VERSION_1: case UAC_VERSION_2: default: return uac_processing_unit_bmControls(desc, protocol) + control_size + 1; case UAC_VERSION_3: return uac_processing_unit_bmControls(desc, protocol) + control_size; }}
/* * Extension Unit (XU) has almost compatible layout with Processing Unit, but * on UAC2, it has a different bmControls size (bControlSize); it's 1 byte for * XU while 2 bytes for PU. The last iExtension field is a one-byte index as * well as iProcessing field of PU. */static inline __u8 uac_extension_unit_bControlSize(struct uac_processing_unit_descriptor *desc, int protocol){ switch (protocol) { case UAC_VERSION_1: return desc->baSourceID[desc->bNrInPins + 4]; case UAC_VERSION_2: return 1; /* in UAC2, this value is constant */ case UAC_VERSION_3: return 4; /* in UAC3, this value is constant */ default: return 1; }}
static inline __u8 uac_extension_unit_iExtension(struct uac_processing_unit_descriptor *desc, int protocol){ __u8 control_size = uac_extension_unit_bControlSize(desc, protocol);
switch (protocol) { case UAC_VERSION_1: case UAC_VERSION_2: default: return *(uac_processing_unit_bmControls(desc, protocol) + control_size); case UAC_VERSION_3: return 0; /* UAC3 does not have this field */ }}
/* 4.5.2 Class-Specific AS Interface Descriptor */struct uac1_as_header_descriptor { __u8 bLength; /* in bytes: 7 */ __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ __u8 bDescriptorSubtype; /* AS_GENERAL */ __u8 bTerminalLink; /* Terminal ID of connected Terminal */ __u8 bDelay; /* Delay introduced by the data path */ __le16 wFormatTag; /* The Audio Data Format */} __attribute__ ((packed));
#define UAC_DT_AS_HEADER_SIZE 7
/* Formats - A.1.1 Audio Data Format Type I Codes */#define UAC_FORMAT_TYPE_I_UNDEFINED 0x0#define UAC_FORMAT_TYPE_I_PCM 0x1#define UAC_FORMAT_TYPE_I_PCM8 0x2#define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3#define UAC_FORMAT_TYPE_I_ALAW 0x4#define UAC_FORMAT_TYPE_I_MULAW 0x5
struct uac_format_type_i_continuous_descriptor { __u8 bLength; /* in bytes: 8 + (ns * 3) */ __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ __u8 bDescriptorSubtype; /* FORMAT_TYPE */ __u8 bFormatType; /* FORMAT_TYPE_1 */ __u8 bNrChannels; /* physical channels in the stream */ __u8 bSubframeSize; /* */ __u8 bBitResolution; __u8 bSamFreqType; __u8 tLowerSamFreq[3]; __u8 tUpperSamFreq[3];} __attribute__ ((packed));
#define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14
struct uac_format_type_i_discrete_descriptor { __u8 bLength; /* in bytes: 8 + (ns * 3) */ __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ __u8 bDescriptorSubtype; /* FORMAT_TYPE */ __u8 bFormatType; /* FORMAT_TYPE_1 */ __u8 bNrChannels; /* physical channels in the stream */ __u8 bSubframeSize; /* */ __u8 bBitResolution; __u8 bSamFreqType; __u8 tSamFreq[][3];} __attribute__ ((packed));
#define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \struct uac_format_type_i_discrete_descriptor_##n { \ __u8 bLength; \ __u8 bDescriptorType; \ __u8 bDescriptorSubtype; \ __u8 bFormatType; \ __u8 bNrChannels; \ __u8 bSubframeSize; \ __u8 bBitResolution; \ __u8 bSamFreqType; \ __u8 tSamFreq[n][3]; \} __attribute__ ((packed))
#define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
struct uac_format_type_i_ext_descriptor { __u8 bLength; __u8 bDescriptorType; __u8 bDescriptorSubtype; __u8 bFormatType; __u8 bSubslotSize; __u8 bBitResolution; __u8 bHeaderLength; __u8 bControlSize; __u8 bSideBandProtocol;} __attribute__((packed));
/* Formats - Audio Data Format Type I Codes */
#define UAC_FORMAT_TYPE_II_MPEG 0x1001#define UAC_FORMAT_TYPE_II_AC3 0x1002
struct uac_format_type_ii_discrete_descriptor { __u8 bLength; __u8 bDescriptorType; __u8 bDescriptorSubtype; __u8 bFormatType; __le16 wMaxBitRate; __le16 wSamplesPerFrame; __u8 bSamFreqType; __u8 tSamFreq[][3];} __attribute__((packed));
struct uac_format_type_ii_ext_descriptor { __u8 bLength; __u8 bDescriptorType; __u8 bDescriptorSubtype; __u8 bFormatType; __le16 wMaxBitRate; __le16 wSamplesPerFrame; __u8 bHeaderLength; __u8 bSideBandProtocol;} __attribute__((packed));
/* type III */#define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001#define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1 0x2002#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT 0x2004#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS 0x2005#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS 0x2006
/* Formats - A.2 Format Type Codes */#define UAC_FORMAT_TYPE_UNDEFINED 0x0#define UAC_FORMAT_TYPE_I 0x1#define UAC_FORMAT_TYPE_II 0x2#define UAC_FORMAT_TYPE_III 0x3#define UAC_EXT_FORMAT_TYPE_I 0x81#define UAC_EXT_FORMAT_TYPE_II 0x82#define UAC_EXT_FORMAT_TYPE_III 0x83
struct uac_iso_endpoint_descriptor { __u8 bLength; /* in bytes: 7 */ __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */ __u8 bDescriptorSubtype; /* EP_GENERAL */ __u8 bmAttributes; __u8 bLockDelayUnits; __le16 wLockDelay;} __attribute__((packed));#define UAC_ISO_ENDPOINT_DESC_SIZE 7
#define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01#define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02#define UAC_EP_CS_ATTR_FILL_MAX 0x80
/* status word format (3.7.1.1) */
#define UAC1_STATUS_TYPE_ORIG_MASK 0x0f#define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF 0x0#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF 0x1#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP 0x2
#define UAC1_STATUS_TYPE_IRQ_PENDING (1 << 7)#define UAC1_STATUS_TYPE_MEM_CHANGED (1 << 6)
struct uac1_status_word { __u8 bStatusType; __u8 bOriginator;} __attribute__((packed));
#endif /* _UAPI__LINUX_USB_AUDIO_H */