diff options
Diffstat (limited to 'LUFA/Drivers/USB/Class/Common/Audio.h')
| -rw-r--r-- | LUFA/Drivers/USB/Class/Common/Audio.h | 45 |
1 files changed, 32 insertions, 13 deletions
diff --git a/LUFA/Drivers/USB/Class/Common/Audio.h b/LUFA/Drivers/USB/Class/Common/Audio.h index cc6e8e52d..fd9a3a92b 100644 --- a/LUFA/Drivers/USB/Class/Common/Audio.h +++ b/LUFA/Drivers/USB/Class/Common/Audio.h @@ -197,7 +197,7 @@ * * \param[in] freq Required audio sampling frequency in HZ */ - #define AUDIO_SAMPLE_FREQ(freq) {.Byte1 = ((uint32_t)freq & 0x0000FF), .Byte2 = (((uint32_t)freq >> 8) & 0xFF), .Byte3 = (((uint32_t)freq >> 16) & 0xFF)} + #define AUDIO_SAMPLE_FREQ(freq) {.Byte1 = ((uint32_t)freq & 0xFF), .Byte2 = (((uint32_t)freq >> 8) & 0xFF), .Byte3 = (((uint32_t)freq >> 16) & 0xFF)} /** Mask for the attributes parameter of an Audio class-specific Endpoint descriptor, indicating that the endpoint * accepts only filled endpoint packets of audio samples. @@ -208,6 +208,16 @@ * will accept partially filled endpoint packets of audio samples. */ #define AUDIO_EP_ACCEPTS_SMALL_PACKETS (0 << 7) + + /** Mask for the attributes parameter of an Audio class-specific Endpoint descriptor, indicating that the endpoint + * allows for sampling frequency adjustments to be made via control requests directed at the endpoint. + */ + #define AUDIO_EP_SAMPLE_FREQ_CONTROL (1 << 0) + + /** Mask for the attributes parameter of an Audio class-specific Endpoint descriptor, indicating that the endpoint + * allows for pitch adjustments to be made via control requests directed at the endpoint. + */ + #define AUDIO_EP_PITCH_CONTROL (1 << 1) /* Enums: */ /** Enum for possible Class, Subclass and Protocol values of device and interface descriptors relating to the Audio @@ -277,6 +287,15 @@ 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. */ + }; /* Type Defines: */ /** \brief Audio class-specific Input Terminal Descriptor (LUFA naming conventions). @@ -538,18 +557,6 @@ uint16_t wFormatTag; /**< Format of the audio stream, see Audio Device Formats specification. */ } ATTR_PACKED USB_Audio_StdDescriptor_Interface_AS_t; - /** \brief 24-Bit Audio Frequency Structure. - * - * Type define for a 24bit audio sample frequency structure. GCC does not contain a built in 24bit datatype, - * this this structure is used to build up the value instead. Fill this structure with the \ref AUDIO_SAMPLE_FREQ() macro. - */ - typedef struct - { - uint8_t Byte1; /**< Lowest 8 bits of the 24-bit value. */ - uint8_t Byte2; /**< Middle 8 bits of the 24-bit value. */ - uint8_t Byte3; /**< Upper 8 bits of the 24-bit value. */ - } ATTR_PACKED USB_Audio_SampleFreq_t; - /** \brief Audio class-specific Format Descriptor (LUFA naming conventions). * * Type define for an Audio class-specific audio format descriptor. This is used to give the host full details @@ -581,6 +588,18 @@ */ } ATTR_PACKED USB_Audio_Descriptor_Format_t; + /** \brief 24-Bit Audio Frequency Structure. + * + * Type define for a 24bit audio sample frequency structure. As GCC does not contain a built in 24-bit datatype, + * this this structure is used to build up the value instead. Fill this structure with the \ref AUDIO_SAMPLE_FREQ() macro. + */ + typedef struct + { + uint8_t Byte1; /**< Lowest 8 bits of the 24-bit value. */ + uint8_t Byte2; /**< Middle 8 bits of the 24-bit value. */ + uint8_t Byte3; /**< Upper 8 bits of the 24-bit value. */ + } ATTR_PACKED USB_Audio_SampleFreq_t; + /** \brief Audio class-specific Format Descriptor (USB-IF naming conventions). * * Type define for an Audio class-specific audio format descriptor. This is used to give the host full details |