#include <string.h>\r
\r
/* Macros: */\r
+ /** Descriptor header constant to indicate a Audio class interface descriptor. */\r
+ #define DTYPE_AudioInterface 0x24\r
\r
- /* Enums: */\r
+ /** Descriptor header constant to indicate a Audio class endpoint descriptor. */\r
+ #define DTYPE_AudioEndpoint 0x25\r
\r
+ /** Audio class descriptor subtype value for a Audio class specific header descriptor. */\r
+ #define DSUBTYPE_Header 0x01\r
+\r
+ /** Audio class descriptor subtype value for an Output Terminal Audio class specific descriptor. */\r
+ #define DSUBTYPE_InputTerminal 0x02\r
+\r
+ /** Audio class descriptor subtype value for an Input Terminal Audio class specific descriptor. */\r
+ #define DSUBTYPE_OutputTerminal 0x03\r
+\r
+ /** Audio class descriptor subtype value for a Feature Unit Audio class specific descriptor. */\r
+ #define DSUBTYPE_FeatureUnit 0x06\r
+\r
+ /** Audio class descriptor subtype value for a general Audio class specific descriptor. */\r
+ #define DSUBTYPE_General 0x01\r
+\r
+ /** Audio class descriptor subtype value for an Audio class specific descriptor indicating the format of an audio stream. */\r
+ #define DSUBTYPE_Format 0x02\r
+ \r
+ //@{\r
+ /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */\r
+\r
+ #define CHANNEL_LEFT_FRONT (1 << 0)\r
+ #define CHANNEL_RIGHT_FRONT (1 << 1)\r
+ #define CHANNEL_CENTER_FRONT (1 << 2)\r
+ #define CHANNEL_LOW_FREQ_ENHANCE (1 << 3)\r
+ #define CHANNEL_LEFT_SURROUND (1 << 4)\r
+ #define CHANNEL_RIGHT_SURROUND (1 << 5)\r
+ #define CHANNEL_LEFT_OF_CENTER (1 << 6)\r
+ #define CHANNEL_RIGHT_OF_CENTER (1 << 7)\r
+ #define CHANNEL_SURROUND (1 << 8)\r
+ #define CHANNEL_SIDE_LEFT (1 << 9)\r
+ #define CHANNEL_SIDE_RIGHT (1 << 10)\r
+ #define CHANNEL_TOP (1 << 11)\r
+ //@}\r
+\r
+ //@{\r
+ /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */\r
+\r
+ #define FEATURE_MUTE (1 << 0)\r
+ #define FEATURE_VOLUME (1 << 1)\r
+ #define FEATURE_BASS (1 << 2)\r
+ #define FEATURE_MID (1 << 3)\r
+ #define FEATURE_TREBLE (1 << 4)\r
+ #define FEATURE_GRAPHIC_EQUALIZER (1 << 5)\r
+ #define FEATURE_AUTOMATIC_GAIN (1 << 6)\r
+ #define FEATURE_DELAY (1 << 7)\r
+ #define FEATURE_BASS_BOOST (1 << 8)\r
+ #define FEATURE_BASS_LOUDNESS (1 << 9)\r
+ //@}\r
+\r
+ //@{\r
+ /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */\r
+ \r
+ #define TERMINAL_UNDEFINED 0x0100\r
+ #define TERMINAL_STREAMING 0x0101\r
+ #define TERMINAL_VENDOR 0x01FF\r
+ #define TERMINAL_IN_UNDEFINED 0x0200\r
+ #define TERMINAL_IN_MIC 0x0201\r
+ #define TERMINAL_IN_DESKTOP_MIC 0x0202\r
+ #define TERMINAL_IN_PERSONAL_MIC 0x0203\r
+ #define TERMINAL_IN_OMNIDIR_MIC 0x0204\r
+ #define TERMINAL_IN_MIC_ARRAY 0x0205\r
+ #define TERMINAL_IN_PROCESSING_MIC 0x0206\r
+ #define TERMINAL_IN_OUT_UNDEFINED 0x0300\r
+ #define TERMINAL_OUT_SPEAKER 0x0301\r
+ #define TERMINAL_OUT_HEADPHONES 0x0302\r
+ #define TERMINAL_OUT_HEAD_MOUNTED 0x0303\r
+ #define TERMINAL_OUT_DESKTOP 0x0304\r
+ #define TERMINAL_OUT_ROOM 0x0305\r
+ #define TERMINAL_OUT_COMMUNICATION 0x0306\r
+ #define TERMINAL_OUT_LOWFREQ 0x0307\r
+ //@}\r
+\r
+ /** Convenience macro, to fill a 24-bit AudioSampleFreq_t structure with the given sample rate as a 24-bit number.\r
+ *\r
+ * \param freq Required audio sampling frequency in HZ\r
+ */\r
+ #define SAMPLE_FREQ(freq) {LowWord: ((uint32_t)freq & 0x00FFFF), HighByte: (((uint32_t)freq >> 16) & 0x0000FF)}\r
+ \r
+ /** Mask for the attributes parameter of an Audio class specific Endpoint descriptor, indicating that the endpoint\r
+ * accepts only filled endpoint packets of audio samples.\r
+ */\r
+ #define EP_ACCEPTS_ONLY_FULL_PACKETS (1 << 7)\r
+\r
+ /** Mask for the attributes parameter of an Audio class specific Endpoint descriptor, indicating that the endpoint\r
+ * will accept partially filled endpoint packets of audio samples.\r
+ */\r
+ #define EP_ACCEPTS_SMALL_PACKETS (0 << 7)\r
+ \r
/* Type Defines: */\r
+ /** Type define for an Audio class specific interface descriptor. This follows a regular interface descriptor to\r
+ * supply extra information about the audio device's layout to the host. See the USB Audio specification for more\r
+ * details.\r
+ */\r
+ typedef struct\r
+ {\r
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */\r
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */\r
+\r
+ uint16_t ACSpecification; /**< Binary coded decimal value, indicating the supported Audio Class specification version */\r
+ uint16_t TotalLength; /**< Total length of the Audio class specific descriptors, including this descriptor */\r
+ \r
+ uint8_t InCollection; /**< Total number of audio class interfaces within this device */\r
+ uint8_t InterfaceNumbers[1]; /**< Interface numbers of each audio interface */\r
+ } USB_AudioInterface_AC_t;\r
+ \r
+ /** Type define for an Audio class specific Feature Unit descriptor. This indicates to the host what features\r
+ * are present in the device's audio stream for basic control, such as per-channel volume. See the USB Audio\r
+ * specification for more details.\r
+ */\r
+ typedef struct\r
+ {\r
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */\r
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */\r
+ \r
+ uint8_t UnitID; /**< ID value of this feature unit - must be a unique value within the device */\r
+ uint8_t SourceID; /**< Source ID value of the audio source input into this feature unit */\r
+ \r
+ uint8_t ControlSize; /**< Size of each element in the ChanelControlls array */\r
+ uint8_t ChannelControls[3]; /**< Feature masks for the control channel, and each separate audio channel */\r
+ \r
+ uint8_t FeatureUnitStrIndex; /**< Index of a string descriptor describing this descriptor within the device */\r
+ } USB_AudioFeatureUnit_t;\r
+\r
+ /** Type define for an Audio class specific input terminal descriptor. This indicates to the host that the device\r
+ * contains an input audio source, either from a physical terminal on the device, or a logical terminal (for example,\r
+ * a USB endpoint). See the USB Audio specification for more details.\r
+ */\r
+ typedef struct\r
+ {\r
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */\r
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */\r
+ \r
+ uint8_t TerminalID; /**< ID value of this terminal unit - must be a unique value within the device */\r
+ uint16_t TerminalType; /**< Type of terminal, a TERMINAL_* mask */\r
+ uint8_t AssociatedOutputTerminal; /**< ID of associated output terminal, for physically grouped terminals\r
+ * such as the speaker and microphone of a phone handset\r
+ */\r
+ uint8_t TotalChannels; /**< Total number of separate audio channels within this interface (right, left, etc.) */\r
+ uint16_t ChannelConfig; /**< CHANNEL_* masks indicating what channel layout is supported by this terminal */\r
+ \r
+ uint8_t ChannelStrIndex; /**< Index of a string descriptor describing this channel within the device */\r
+ uint8_t TerminalStrIndex; /**< Index of a string descriptor describing this descriptor within the device */\r
+ } USB_AudioInputTerminal_t;\r
+\r
+ /** Type define for an Audio class specific output terminal descriptor. This indicates to the host that the device\r
+ * contains an output audio sink, either to a physical terminal on the device, or a logical terminal (for example,\r
+ * a USB endpoint). See the USB Audio specification for more details.\r
+ */\r
+ typedef struct\r
+ {\r
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */\r
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */\r
+ \r
+ uint8_t TerminalID; /**< ID value of this terminal unit - must be a unique value within the device */\r
+ uint16_t TerminalType; /**< Type of terminal, a TERMINAL_* mask */\r
+ uint8_t AssociatedInputTerminal; /**< ID of associated input terminal, for physically grouped terminals\r
+ * such as the speaker and microphone of a phone handset\r
+ */\r
+ uint8_t SourceID; /**< ID value of the unit this terminal's audio is sourced from */\r
+ \r
+ uint8_t TerminalStrIndex; /**< Index of a string descriptor describing this descriptor within the device */\r
+ } USB_AudioOutputTerminal_t;\r
+ \r
+ /** Type define for an Audio class specific streaming interface descriptor. This indicates to the host\r
+ * how audio streams within the device are formatted. See the USB Audio specification for more details.\r
+ */\r
+ typedef struct\r
+ {\r
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */\r
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */\r
+ \r
+ uint8_t TerminalLink; /**< ID value of the output terminal this descriptor is describing */\r
+ \r
+ uint8_t FrameDelay; /**< Delay in frames resulting from the complete sample processing from input to output */\r
+ uint16_t AudioFormat; /**< Format of the audio stream, see Audio Device Formats specification */\r
+ } USB_AudioInterface_AS_t;\r
+ \r
+ /** Type define for a 24bit audio sample frequency structure. GCC does not contain a built in 24bit datatype,\r
+ * this this structure is used to build up the value instead. Fill this structure with the SAMPLE_FREQ() macro.\r
+ */\r
+ typedef struct\r
+ {\r
+ uint16_t LowWord; /**< Low 16 bits of the 24-bit value */\r
+ uint8_t HighByte; /**< Upper 8 bits of the 24-bit value */\r
+ } AudioSampleFreq_t;\r
+\r
+ /** Type define for an Audio class specific audio format descriptor. This is used to give the host full details\r
+ * about the number of channels, the sample resolution, acceptable sample frequencies and encoding method used\r
+ * in the device's audio streams. See the USB Audio specification for more details.\r
+ */\r
+ typedef struct\r
+ {\r
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */\r
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */\r
+\r
+ uint8_t FormatType; /**< Format of the audio stream, see Audio Device Formats specification */\r
+ uint8_t Channels; /**< Total number of discrete channels in the stream */\r
+ \r
+ uint8_t SubFrameSize; /**< Size in bytes of each channel's sample data in the stream */\r
+ uint8_t BitResolution; /**< Bits of resolution of each channel's samples in the stream */\r
+\r
+ uint8_t SampleFrequencyType; /**< Total number of sample frequencies supported by the device */ \r
+ AudioSampleFreq_t SampleFrequencies[1]; /**< Sample frequencies supported by the device */\r
+ } USB_AudioFormat_t;\r
+ \r
+ /** Type define for an Audio class specific endpoint descriptor. This contains a regular endpoint \r
+ * descriptor with a few Audio-class specific extensions. See the USB Audio specification for more details.\r
+ */\r
+ typedef struct\r
+ {\r
+ USB_Descriptor_Endpoint_t Endpoint; /**< Standard endpoint descriptor describing the audio endpoint */\r
+\r
+ uint8_t Refresh; /**< Always set to zero */\r
+ uint8_t SyncEndpointNumber; /**< Endpoint address to send synchronisation information to, if needed (zero otherwise) */\r
+ } USB_AudioStreamEndpoint_Std_t;\r
+ \r
+ /** Type define for an Audio class specific extended endpoint descriptor. This contains extra information\r
+ * on the usage of endpoints used to stream audio in and out of the USB Audio device, and follows an Audio\r
+ * class specific extended endpoint descriptor. See the USB Audio specification for more details.\r
+ */\r
+ typedef struct\r
+ {\r
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */\r
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */\r
+ \r
+ uint8_t Attributes; /**< Audio class specific endpoint attributes, such as ACCEPTS_SMALL_PACKETS */\r
+\r
+ uint8_t LockDelayUnits; /**< Units used for the LockDelay field, see Audio class specification */\r
+ uint16_t LockDelay; /**< Time required to internally lock endpoint's internal clock recovery circuitry */\r
+ } USB_AudioStreamEndpoint_Spc_t; \r
+\r
typedef struct\r
{\r
uint8_t InterfaceNumber;\r
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