+ /* Enums: */
+ /** Enum for possible Class, Subclass and Protocol values of device and interface descriptors relating to the Audio
+ * device class.
+ */
+ enum Audio_Descriptor_ClassSubclassProtocol_t
+ {
+ AUDIO_CSCP_AudioClass = 0x01, /**< Descriptor Class value indicating that the device or
+ * interface belongs to the USB Audio 1.0 class.
+ */
+ AUDIO_CSCP_ControlSubclass = 0x01, /**< Descriptor Subclass value indicating that the device or
+ * interface belongs to the Audio Control subclass.
+ */
+ AUDIO_CSCP_ControlProtocol = 0x00, /**< Descriptor Protocol value indicating that the device or
+ * interface belongs to the Audio Control protocol.
+ */
+ AUDIO_CSCP_AudioStreamingSubclass = 0x02, /**< Descriptor Subclass value indicating that the device or
+ * interface belongs to the MIDI Streaming subclass.
+ */
+ AUDIO_CSCP_MIDIStreamingSubclass = 0x03, /**< Descriptor Subclass value indicating that the device or
+ * interface belongs to the Audio streaming subclass.
+ */
+ AUDIO_CSCP_StreamingProtocol = 0x00, /**< Descriptor Protocol value indicating that the device or
+ * interface belongs to the Streaming Audio protocol.
+ */
+ };
+
+ /** Audio class specific interface description subtypes, for the Audio Control interface. */
+ enum Audio_CSInterface_AC_SubTypes_t
+ {
+ AUDIO_DSUBTYPE_CSInterface_Header = 0x01, /**< Audio class specific control interface header. */
+ AUDIO_DSUBTYPE_CSInterface_InputTerminal = 0x02, /**< Audio class specific control interface Input Terminal. */
+ AUDIO_DSUBTYPE_CSInterface_OutputTerminal = 0x03, /**< Audio class specific control interface Output Terminal. */
+ AUDIO_DSUBTYPE_CSInterface_Mixer = 0x04, /**< Audio class specific control interface Mixer Unit. */
+ AUDIO_DSUBTYPE_CSInterface_Selector = 0x05, /**< Audio class specific control interface Selector Unit. */
+ AUDIO_DSUBTYPE_CSInterface_Feature = 0x06, /**< Audio class specific control interface Feature Unit. */
+ AUDIO_DSUBTYPE_CSInterface_Processing = 0x07, /**< Audio class specific control interface Processing Unit. */
+ AUDIO_DSUBTYPE_CSInterface_Extension = 0x08, /**< Audio class specific control interface Extension Unit. */
+ };
+
+ /** Audio class specific interface description subtypes, for the Audio Streaming interface. */
+ enum Audio_CSInterface_AS_SubTypes_t
+ {
+ AUDIO_DSUBTYPE_CSInterface_General = 0x01, /**< Audio class specific streaming interface general descriptor. */
+ AUDIO_DSUBTYPE_CSInterface_FormatType = 0x02, /**< Audio class specific streaming interface format type descriptor. */
+ AUDIO_DSUBTYPE_CSInterface_FormatSpecific = 0x03, /**< Audio class specific streaming interface format information descriptor. */
+ };
+
+ /** Audio class specific endpoint description subtypes, for the Audio Streaming interface. */
+ enum Audio_CSEndpoint_SubTypes_t
+ {
+ AUDIO_DSUBTYPE_CSEndpoint_General = 0x01, /**< Audio class specific endpoint general descriptor. */
+ };
+
+ /** Enum for the Audio class specific control requests that can be issued by the USB bus host. */
+ enum Audio_ClassRequests_t
+ {
+ AUDIO_REQ_SetCurrent = 0x01, /**< Audio class-specific request to set the current value of a parameter within the device. */
+ AUDIO_REQ_SetMinimum = 0x02, /**< Audio class-specific request to set the minimum value of a parameter within the device. */
+ AUDIO_REQ_SetMaximum = 0x03, /**< Audio class-specific request to set the maximum value of a parameter within the device. */
+ AUDIO_REQ_SetResolution = 0x04, /**< Audio class-specific request to set the resolution value of a parameter within the device. */
+ AUDIO_REQ_SetMemory = 0x05, /**< Audio class-specific request to set the memory value of a parameter within the device. */
+ AUDIO_REQ_GetCurrent = 0x81, /**< Audio class-specific request to get the current value of a parameter within the device. */
+ AUDIO_REQ_GetMinimum = 0x82, /**< Audio class-specific request to get the minimum value of a parameter within the device. */
+ AUDIO_REQ_GetMaximum = 0x83, /**< Audio class-specific request to get the maximum value of a parameter within the device. */
+ AUDIO_REQ_GetResolution = 0x84, /**< Audio class-specific request to get the resolution value of a parameter within the device. */
+ AUDIO_REQ_GetMemory = 0x85, /**< Audio class-specific request to get the memory value of a parameter within the device. */
+ AUDIO_REQ_GetStatus = 0xFF, /**< Audio class-specific request to get the device status. */
+ };
+
+ /** Enum for Audio class specific Endpoint control modifiers which can be set and retrieved by a USB host, if the corresponding
+ * endpoint control is indicated to be supported in the Endpoint's Audio-class specific endpoint descriptor.
+ */
+ enum Audio_EndpointControls_t
+ {
+ AUDIO_EPCONTROL_SamplingFreq = 0x01, /**< Sampling frequency adjustment of the endpoint. */
+ AUDIO_EPCONTROL_Pitch = 0x02, /**< Pitch adjustment of the endpoint. */
+ };
+