LUFA Library  120219
USB_Audio_Descriptor_Format_t Struct Reference

Audio class-specific Format Descriptor (LUFA naming conventions). More...

#include <AudioClassCommon.h>

Data Fields

USB_Descriptor_Header_t Header
uint8_t Subtype
uint8_t FormatType
uint8_t Channels
uint8_t SubFrameSize
uint8_t BitResolution
uint8_t TotalDiscreteSampleRates

Detailed Description

Type define for an Audio class-specific audio format descriptor. This is used to give the host full details about the number of channels, the sample resolution, acceptable sample frequencies and encoding method used in the device's audio streams. See the USB Audio specification for more details.

This descriptor must be followed by one or more USB_Audio_SampleFreq_t elements containing the continuous or discrete sample frequencies.
See also:
USB_Audio_StdDescriptor_Format_t for the version of this type with standard element names.
Regardless of CPU architecture, these values should be stored as little endian.

Field Documentation

Bits of resolution of each channel's samples in the stream.

Total number of discrete channels in the stream.

Format of the audio stream, see Audio Device Formats specification.

Regular descriptor header containing the descriptor's type and length.

Size in bytes of each channel's sample data in the stream.

Sub type value used to distinguish between audio class-specific descriptors, must be AUDIO_DSUBTYPE_CSInterface_FormatType.

Total number of discrete sample frequencies supported by the device. When zero, this must be followed by the lower and upper continuous sampling frequencies supported by the device; otherwise, this must be followed by the given number of discrete sampling frequencies supported.

The documentation for this struct was generated from the following file:
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