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Edit File : audio.h \| Size : 19.03 KB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note / / * <linux/usb/audio.h> -- USB Audio definitions. * * Copyright (C) 2006 Thumtronics Pty Ltd. * Developed for Thumtronics by Grey Innovation * Ben Williamson <ben.williamson@greyinnovation.com> * * This software is distributed under the terms of the GNU General Public * License ("GPL") version 2, as published by the Free Software Foundation. * * This file holds USB constants and structures defined * by the USB Device Class Definition for Audio Devices. * Comments below reference relevant sections of that document: * * http://www.usb.org/developers/devclass_docs/audio10.pdf * * Types and defines in this file are either specific to version 1.0 of * this standard or common for newer versions. / #ifndef __LINUX_USB_AUDIO_H #define __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[0]; / 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 / __LINUX_USB_AUDIO_H */ Back

Edit File : audio.h | Size : 19.03 KB

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * <linux/usb/audio.h> -- USB Audio definitions.
 *
 * Copyright (C) 2006 Thumtronics Pty Ltd.
 * Developed for Thumtronics by Grey Innovation
 * Ben Williamson <ben.williamson@greyinnovation.com>
 *
 * This software is distributed under the terms of the GNU General Public
 * License ("GPL") version 2, as published by the Free Software Foundation.
 *
 * This file holds USB constants and structures defined
 * by the USB Device Class Definition for Audio Devices.
 * Comments below reference relevant sections of that document:
 *
 * http://www.usb.org/developers/devclass_docs/audio10.pdf
 *
 * Types and defines in this file are either specific to version 1.0 of
 * this standard or common for newer versions.
 */

#ifndef __LINUX_USB_AUDIO_H
#define __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_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[0]; /* 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);

/* 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 /* __LINUX_USB_AUDIO_H */

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