Added new callback to the Audio Class driver to allow for endpoint control manipulati...

[pub/USBasp.git] / LUFA / Drivers / USB / Class / Common / Audio.h

diff --git a/LUFA/Drivers/USB/Class/Common/Audio.h b/LUFA/Drivers/USB/Class/Common/Audio.h
index cc6e8e5..fd9a3a9 100644 (file)
--- 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