LUFA/Drivers/USB/Class/Common/MIDIClassCommon.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2013.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2013  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaims all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *  \brief Common definitions and declarations for the library USB MIDI Class driver.
  33  *
  34  *  Common definitions and declarations for the library USB MIDI Class driver.
  35  *
  36  *  \note This file should not be included directly. It is automatically included as needed by the USB module driver
  37  *        dispatch header located in LUFA/Drivers/USB.h.
  38  */
  39
  40 /** \ingroup Group_USBClassMIDI
  41  *  \defgroup Group_USBClassMIDICommon  Common Class Definitions
  42  *
  43  *  \section Sec_ModDescription Module Description
  44  *  Constants, Types and Enum definitions that are common to both Device and Host modes for the USB
  45  *  MIDI Class.
  46  *
  47  *  @{
  48  */
  49
  50 #ifndef _MIDI_CLASS_COMMON_H_
  51 #define _MIDI_CLASS_COMMON_H_
  52
  53         /* Macros: */
  54                 #define __INCLUDE_FROM_AUDIO_DRIVER
  55
  56         /* Includes: */
  57                 #include "../../Core/StdDescriptors.h"
  58                 #include "AudioClassCommon.h"
  59
  60         /* Enable C linkage for C++ Compilers: */
  61                 #if defined(__cplusplus)
  62                         extern "C" {
  63                 #endif
  64
  65         /* Preprocessor Checks: */
  66                 #if !defined(__INCLUDE_FROM_MIDI_DRIVER)
  67                         #error Do not include this file directly. Include LUFA/Drivers/USB.h instead.
  68                 #endif
  69
  70         /* Macros: */
  71                 /** \name MIDI Command Values
  72                  *  See http://www.midi.org/techspecs/midimessages.php for more information.
  73                  */
  74                 //@{
  75                 /** MIDI command for System Exclusive (SysEx) single event that has one byte of data total. */
  76                 #define MIDI_COMMAND_SYSEX_1BYTE           MIDI_COMMAND_SYSEX_END_1BYTE
  77
  78                 /** MIDI command for System Exclusive (SysEx) single event that has two bytes of data total. */
  79                 #define MIDI_COMMAND_SYSEX_2BYTE           0x20
  80
  81                 /** MIDI command for System Exclusive (SysEx) single event that has three bytes of data total. */
  82                 #define MIDI_COMMAND_SYSEX_3BYTE           0x30
  83
  84                 /** MIDI command for System Exclusive (SysEx) stream event that has at least four bytes of data total. */
  85                 #define MIDI_COMMAND_SYSEX_START_3BYTE     0x40
  86
  87                 /** MIDI command for System Exclusive (SysEx) stream event terminator with one remaining data byte. */
  88                 #define MIDI_COMMAND_SYSEX_END_1BYTE       0x50
  89
  90                 /** MIDI command for System Exclusive (SysEx) stream event terminator with two remaining data bytes. */
  91                 #define MIDI_COMMAND_SYSEX_END_2BYTE       0x60
  92
  93                 /** MIDI command for System Exclusive (SysEx) stream event terminator with three remaining data bytes. */
  94                 #define MIDI_COMMAND_SYSEX_END_3BYTE       0x70
  95
  96                 /** MIDI command for a note off (deactivation) event. */
  97                 #define MIDI_COMMAND_NOTE_OFF              0x80
  98
  99                 /** MIDI command for a note on (activation) event. */
 100                 #define MIDI_COMMAND_NOTE_ON               0x90
 101
 102                 /** MIDI command for a note pressure change event. */
 103                 #define MIDI_COMMAND_NOTE_PRESSURE         0xA0
 104
 105                 /** MIDI command for a control change event. */
 106                 #define MIDI_COMMAND_CONTROL_CHANGE        0xB0
 107
 108                 /** MIDI command for a control change event. */
 109                 #define MIDI_COMMAND_PROGRAM_CHANGE        0xC0
 110
 111                 /** MIDI command for a channel pressure change event. */
 112                 #define MIDI_COMMAND_CHANNEL_PRESSURE      0xD0
 113
 114                 /** MIDI command for a pitch change event. */
 115                 #define MIDI_COMMAND_PITCH_WHEEL_CHANGE    0xE0
 116                 //@}
 117
 118                 /** Standard key press velocity value used for all note events. */
 119                 #define MIDI_STANDARD_VELOCITY             64
 120
 121                 /** Convenience macro. MIDI channels are numbered from 1-10 (natural numbers) however the logical channel
 122                  *  addresses are zero-indexed. This converts a natural MIDI channel number into the logical channel address.
 123                  *
 124                  *  \param[in] channel  MIDI channel number to address.
 125                  *
 126                  *  \return Constructed MIDI channel ID.
 127                  */
 128                 #define MIDI_CHANNEL(channel)              ((channel) - 1)
 129
 130                 /** Constructs a MIDI event ID from a given MIDI command and a virtual MIDI cable index. This can then be
 131                  *  used to create and decode \ref MIDI_EventPacket_t MIDI event packets.
 132                  *
 133                  *  \param[in] virtualcable  Index of the virtual MIDI cable the event relates to
 134                  *  \param[in] command       MIDI command to send through the virtual MIDI cable
 135                  *
 136                  *  \return Constructed MIDI event ID.
 137                  */
 138                 #define MIDI_EVENT(virtualcable, command)  ((virtualcable << 4) | (command >> 4))
 139
 140         /* Enums: */
 141                 /** Enum for the possible MIDI jack types in a MIDI device jack descriptor. */
 142                 enum MIDI_JackTypes_t
 143                 {
 144                         MIDI_JACKTYPE_Embedded = 0x01, /**< MIDI class descriptor jack type value for an embedded (logical) MIDI input or output jack. */
 145                         MIDI_JACKTYPE_External = 0x02, /**< MIDI class descriptor jack type value for an external (physical) MIDI input or output jack. */
 146                 };
 147
 148         /* Type Defines: */
 149                 /** \brief MIDI class-specific Streaming Interface Descriptor (LUFA naming conventions).
 150                  *
 151                  *  Type define for an Audio class-specific MIDI streaming interface descriptor. This indicates to the host
 152                  *  how MIDI the specification compliance of the device and the total length of the Audio class-specific descriptors.
 153                  *  See the USB Audio specification for more details.
 154                  *
 155                  *  \see \ref USB_MIDI_StdDescriptor_AudioInterface_AS_t for the version of this type with standard element names.
 156                  *
 157                  *  \note Regardless of CPU architecture, these values should be stored as little endian.
 158                  */
 159                 typedef struct
 160                 {
 161                         USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length. */
 162                         uint8_t                 Subtype; /**< Sub type value used to distinguish between audio class-specific descriptors. */
 163
 164                         uint16_t                AudioSpecification; /**< Binary coded decimal value, indicating the supported Audio Class
 165                                                                      *   specification version.
 166                                                                      */
 167                         uint16_t                TotalLength; /**< Total length of the Audio class-specific descriptors, including this descriptor. */
 168                 } ATTR_PACKED USB_MIDI_Descriptor_AudioInterface_AS_t;
 169
 170                 /** \brief MIDI class-specific Streaming Interface Descriptor (USB-IF naming conventions).
 171                  *
 172                  *  Type define for an Audio class-specific MIDI streaming interface descriptor. This indicates to the host
 173                  *  how MIDI the specification compliance of the device and the total length of the Audio class-specific descriptors.
 174                  *  See the USB Audio specification for more details.
 175                  *
 176                  *  \see \ref USB_MIDI_Descriptor_AudioInterface_AS_t for the version of this type with non-standard LUFA specific
 177                  *       element names.
 178                  *
 179                  *  \note Regardless of CPU architecture, these values should be stored as little endian.
 180                  */
 181                 typedef struct
 182                 {
 183                         uint8_t  bLength; /**< Size of the descriptor, in bytes. */
 184                         uint8_t  bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value
 185                                                    *   given by the specific class.
 186                                                    */
 187
 188                         uint8_t  bDescriptorSubtype; /**< Sub type value used to distinguish between audio class-specific descriptors. */
 189
 190                         uint16_t bcdMSC; /**< Binary coded decimal value, indicating the supported MIDI Class specification version. */
 191                         uint16_t wTotalLength; /**< Total length of the Audio class-specific descriptors, including this descriptor. */
 192                 } ATTR_PACKED USB_MIDI_StdDescriptor_AudioInterface_AS_t;
 193
 194                 /** \brief MIDI class-specific Input Jack Descriptor (LUFA naming conventions).
 195                  *
 196                  *  Type define for an Audio class-specific MIDI IN jack. This gives information to the host on a MIDI input, either
 197                  *  a physical input jack, or a logical jack (receiving input data internally, or from the host via an endpoint).
 198                  *
 199                  *  \see \ref USB_MIDI_StdDescriptor_InputJack_t for the version of this type with standard element names.
 200                  *
 201                  *  \note Regardless of CPU architecture, these values should be stored as little endian.
 202                  */
 203                 typedef struct
 204                 {
 205                         USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length. */
 206                         uint8_t                 Subtype; /**< Sub type value used to distinguish between audio class-specific descriptors. */
 207
 208                         uint8_t                 JackType; /**< Type of jack, one of the \c JACKTYPE_* mask values. */
 209                         uint8_t                 JackID; /**< ID value of this jack - must be a unique value within the device. */
 210
 211                         uint8_t                 JackStrIndex; /**< Index of a string descriptor describing this descriptor within the device. */
 212                 } ATTR_PACKED USB_MIDI_Descriptor_InputJack_t;
 213
 214                 /** \brief MIDI class-specific Input Jack Descriptor (USB-IF naming conventions).
 215                  *
 216                  *  Type define for an Audio class-specific MIDI IN jack. This gives information to the host on a MIDI input, either
 217                  *  a physical input jack, or a logical jack (receiving input data internally, or from the host via an endpoint).
 218                  *
 219                  *  \see \ref USB_MIDI_Descriptor_InputJack_t for the version of this type with non-standard LUFA specific
 220                  *       element names.
 221                  *
 222                  *  \note Regardless of CPU architecture, these values should be stored as little endian.
 223                  */
 224                 typedef struct
 225                 {
 226                         uint8_t  bLength; /**< Size of the descriptor, in bytes. */
 227                         uint8_t  bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value
 228                                                    *   given by the specific class.
 229                                                    */
 230
 231                         uint8_t  bDescriptorSubtype; /**< Sub type value used to distinguish between audio class-specific descriptors. */
 232
 233                         uint8_t  bJackType; /**< Type of jack, one of the \c JACKTYPE_* mask values. */
 234                         uint8_t  bJackID; /**< ID value of this jack - must be a unique value within the device. */
 235
 236                         uint8_t  iJack; /**< Index of a string descriptor describing this descriptor within the device. */
 237                 } ATTR_PACKED USB_MIDI_StdDescriptor_InputJack_t;
 238
 239                 /** \brief MIDI class-specific Output Jack Descriptor (LUFA naming conventions).
 240                  *
 241                  *  Type define for an Audio class-specific MIDI OUT jack. This gives information to the host on a MIDI output, either
 242                  *  a physical output jack, or a logical jack (sending output data internally, or to the host via an endpoint).
 243                  *
 244                  *  \see \ref USB_MIDI_StdDescriptor_OutputJack_t for the version of this type with standard element names.
 245                  *
 246                  *  \note Regardless of CPU architecture, these values should be stored as little endian.
 247                  */
 248                 typedef struct
 249                 {
 250                         USB_Descriptor_Header_t   Header; /**< Regular descriptor header containing the descriptor's type and length. */
 251                         uint8_t                   Subtype; /**< Sub type value used to distinguish between audio class-specific descriptors. */
 252
 253                         uint8_t                   JackType; /**< Type of jack, one of the \c JACKTYPE_* mask values. */
 254                         uint8_t                   JackID; /**< ID value of this jack - must be a unique value within the device. */
 255
 256                         uint8_t                   NumberOfPins; /**< Number of output channels within the jack, either physical or logical. */
 257                         uint8_t                   SourceJackID[1]; /**< ID of each output pin's source data jack. */
 258                         uint8_t                   SourcePinID[1]; /**< Pin number in the input jack of each output pin's source data. */
 259
 260                         uint8_t                   JackStrIndex; /**< Index of a string descriptor describing this descriptor within the device. */
 261                 } ATTR_PACKED USB_MIDI_Descriptor_OutputJack_t;
 262
 263                 /** \brief MIDI class-specific Output Jack Descriptor (USB-IF naming conventions).
 264                  *
 265                  *  Type define for an Audio class-specific MIDI OUT jack. This gives information to the host on a MIDI output, either
 266                  *  a physical output jack, or a logical jack (sending output data internally, or to the host via an endpoint).
 267                  *
 268                  *  \see \ref USB_MIDI_Descriptor_OutputJack_t for the version of this type with non-standard LUFA specific
 269                  *       element names.
 270                  *
 271                  *  \note Regardless of CPU architecture, these values should be stored as little endian.
 272                  */
 273                 typedef struct
 274                 {
 275                         uint8_t  bLength; /**< Size of the descriptor, in bytes. */
 276                         uint8_t  bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value
 277                                                    *   given by the specific class.
 278                                                    */
 279
 280                         uint8_t  bDescriptorSubtype; /**< Sub type value used to distinguish between audio class-specific descriptors. */
 281
 282                         uint8_t  bJackType; /**< Type of jack, one of the \c JACKTYPE_* mask values. */
 283                         uint8_t  bJackID; /**< ID value of this jack - must be a unique value within the device. */
 284
 285                         uint8_t  bNrInputPins; /**< Number of output channels within the jack, either physical or logical. */
 286                         uint8_t  baSourceID[1]; /**< ID of each output pin's source data jack. */
 287                         uint8_t  baSourcePin[1]; /**< Pin number in the input jack of each output pin's source data. */
 288
 289                         uint8_t  iJack; /**< Index of a string descriptor describing this descriptor within the device. */
 290                 } ATTR_PACKED USB_MIDI_StdDescriptor_OutputJack_t;
 291
 292                 /** \brief Audio class-specific Jack Endpoint Descriptor (LUFA naming conventions).
 293                  *
 294                  *  Type define for an Audio class-specific extended MIDI jack endpoint descriptor. This contains extra information
 295                  *  on the usage of MIDI endpoints used to stream MIDI events in and out of the USB Audio device, and follows an Audio
 296                  *  class-specific extended MIDI endpoint descriptor. See the USB Audio specification for more details.
 297                  *
 298                  *  \see \ref USB_MIDI_StdDescriptor_Jack_Endpoint_t for the version of this type with standard element names.
 299                  *
 300                  *  \note Regardless of CPU architecture, these values should be stored as little endian.
 301                  */
 302                 typedef struct
 303                 {
 304                         USB_Descriptor_Header_t   Header; /**< Regular descriptor header containing the descriptor's type and length. */
 305                         uint8_t                   Subtype; /**< Sub type value used to distinguish between audio class-specific descriptors. */
 306
 307                         uint8_t                   TotalEmbeddedJacks; /**< Total number of jacks inside this endpoint. */
 308                         uint8_t                   AssociatedJackID[1]; /**< IDs of each jack inside the endpoint. */
 309                 } ATTR_PACKED USB_MIDI_Descriptor_Jack_Endpoint_t;
 310
 311                 /** \brief Audio class-specific Jack Endpoint Descriptor (USB-IF naming conventions).
 312                  *
 313                  *  Type define for an Audio class-specific extended MIDI jack endpoint descriptor. This contains extra information
 314                  *  on the usage of MIDI endpoints used to stream MIDI events in and out of the USB Audio device, and follows an Audio
 315                  *  class-specific extended MIDI endpoint descriptor. See the USB Audio specification for more details.
 316                  *
 317                  *  \see \ref USB_MIDI_Descriptor_Jack_Endpoint_t for the version of this type with non-standard LUFA specific
 318                  *       element names.
 319                  *
 320                  *  \note Regardless of CPU architecture, these values should be stored as little endian.
 321                  */
 322                 typedef struct
 323                 {
 324                         uint8_t  bLength; /**< Size of the descriptor, in bytes. */
 325                         uint8_t  bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value
 326                                                    *   given by the specific class.
 327                                                    */
 328
 329                         uint8_t  bDescriptorSubtype; /**< Sub type value used to distinguish between audio class-specific descriptors. */
 330
 331                         uint8_t  bNumEmbMIDIJack; /**< Total number of jacks inside this endpoint. */
 332                         uint8_t  bAssocJackID[1]; /**< IDs of each jack inside the endpoint. */
 333                 } ATTR_PACKED USB_MIDI_StdDescriptor_Jack_Endpoint_t;
 334
 335                 /** \brief MIDI Class Driver Event Packet.
 336                  *
 337                  *  Type define for a USB MIDI event packet, used to encapsulate sent and received MIDI messages from a USB MIDI interface.
 338                  *
 339                  *  \note Regardless of CPU architecture, these values should be stored as little endian.
 340                  */
 341                 typedef struct
 342                 {
 343                         uint8_t Event; /**< MIDI event type, constructed with the \ref MIDI_EVENT() macro. */
 344
 345                         uint8_t  Data1; /**< First byte of data in the MIDI event. */
 346                         uint8_t  Data2; /**< Second byte of data in the MIDI event. */
 347                         uint8_t  Data3; /**< Third byte of data in the MIDI event. */
 348                 } ATTR_PACKED MIDI_EventPacket_t;
 349
 350         /* Disable C linkage for C++ Compilers: */
 351                 #if defined(__cplusplus)
 352                         }
 353                 #endif
 354
 355 #endif
 356
 357 /** @} */
 358