USBAudioBackend.h File Reference

#include <cstddef>
#include <cstdint>

Go to the source code of this file.

Classes
class	USBAudioBackend
	Abstract seam for every raw USB-stack call the UAC2 driver (USBAudioDeviceBase) needs. Concrete subclasses wrap TinyUSB (USBAudioBackendTinyUSB, today) or a native peripheral driver (STM32 HAL / Renesas USBFS — future work). More...
struct	UsbEndpointDescriptorView
	Backend-agnostic mirror of tusb_desc_endpoint_t (USB 2.0 spec Table 9-13). wMaxPacketSize is kept in its raw little-endian form (bits 10..0 = size, bits 12..11 = high-speed additional transactions per microframe) so it round-trips bit-for-bit back into a real endpoint descriptor for backends that need one; use packetSize() for the masked value the UAC2 driver's own sizing logic uses (this mirrors TinyUSB's tu_edpt_packet_size(), which also only masks the low 11 bits and does not apply the HS multiplier). More...
struct	UsbInterfaceDescriptorView
	Backend-agnostic mirror of tusb_desc_interface_t — only the fields the UAC2 driver reads (USB 2.0 spec Table 9-12). More...
struct	UsbSetupPacket
	Backend-agnostic mirror of the standard 8-byte USB SETUP packet (TinyUSB's tusb_control_request_t). Identical wire layout on any USB stack. The bmRequestType bitfields (USB 2.0 spec Table 9-2) are exposed as accessor methods instead of a bitfield union, so call sites read almost the same as before: p_request->bmRequestType_bit.type -> p_request.type(). More...

Namespaces
namespace	audio_tools
	Generic Implementation of sound input and output for desktop environments using portaudio.

Enumerations
enum class	UsbDir : uint8_t { Out = 0 , In = 1 }
	USB transfer direction, mirrors TinyUSB's TUSB_DIR_OUT/TUSB_DIR_IN (0/1). More...
enum class	UsbSpeed : uint8_t { Full , High , Low , Unknown }
	Device enumerated bus speed, mirrors tusb_speed_t's relevant values. More...
enum class	UsbStdRequest : uint8_t { ClearFeature = 1 , GetInterface = 10 , SetInterface = 11 }
enum class	UsbXferResult : uint8_t { Success , Failed , Stalled }
enum class	UsbXferType : uint8_t { Control = 0 , Isochronous = 1 , Bulk = 2 , Interrupt = 3 }
	USB endpoint transfer type, mirrors tusb_xfer_type_t. More...

Functions
UsbEndpointDescriptorView	decodeEndpoint (uint8_t const *p)
UsbInterfaceDescriptorView	decodeInterface (uint8_t const *p)
uint8_t const *	descNext (uint8_t const *p)
uint8_t	descSubtype (uint8_t const *p)
uint8_t	descType (uint8_t const *p)
uint16_t	descU16 (uint8_t const *p)
uint32_t	descU32 (uint8_t const *p)