X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/74b7c07e96562158de294f92baed4c83b4fce970..f51017f8fb5a02029bce577e3d7226cb5158d830:/LUFA/Drivers/USB/Class/Device/Audio.h diff --git a/LUFA/Drivers/USB/Class/Device/Audio.h b/LUFA/Drivers/USB/Class/Device/Audio.h index 0ea74864a..230da4d9e 100644 --- a/LUFA/Drivers/USB/Class/Device/Audio.h +++ b/LUFA/Drivers/USB/Class/Device/Audio.h @@ -28,6 +28,20 @@ this software. */ +/** \ingroup Group_USBDeviceClassDrivers + * @defgroup Group_USBClassAudioDevice Audio Device Class Driver - LUFA/Drivers/Class/Device/Audio.h + * + * \section Sec_Dependencies Module Source Dependencies + * The following files must be built with any user project that uses this module: + * - LUFA/Drivers/USB/Class/Device/Audio.c + * + * \section Module Description + * Functions, macros, variables, enums and types related to the management of USB Audio Class interfaces + * within a USB device. + * + * @{ + */ + #ifndef _AUDIO_CLASS_H_ #define _AUDIO_CLASS_H_ @@ -36,6 +50,11 @@ #include + /* Enable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + extern "C" { + #endif + /* Macros: */ /** Descriptor header constant to indicate a Audio class interface descriptor. */ #define DTYPE_AudioInterface 0x24 @@ -61,66 +80,133 @@ /** Audio class descriptor subtype value for an Audio class specific descriptor indicating the format of an audio stream. */ #define DSUBTYPE_Format 0x02 - //@{ /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define CHANNEL_LEFT_FRONT (1 << 0) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define CHANNEL_RIGHT_FRONT (1 << 1) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define CHANNEL_CENTER_FRONT (1 << 2) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define CHANNEL_LOW_FREQ_ENHANCE (1 << 3) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define CHANNEL_LEFT_SURROUND (1 << 4) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define CHANNEL_RIGHT_SURROUND (1 << 5) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define CHANNEL_LEFT_OF_CENTER (1 << 6) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define CHANNEL_RIGHT_OF_CENTER (1 << 7) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define CHANNEL_SURROUND (1 << 8) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define CHANNEL_SIDE_LEFT (1 << 9) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define CHANNEL_SIDE_RIGHT (1 << 10) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define CHANNEL_TOP (1 << 11) - //@} - //@{ /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ - #define FEATURE_MUTE (1 << 0) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ #define FEATURE_VOLUME (1 << 1) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ #define FEATURE_BASS (1 << 2) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ #define FEATURE_MID (1 << 3) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ #define FEATURE_TREBLE (1 << 4) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ #define FEATURE_GRAPHIC_EQUALIZER (1 << 5) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ #define FEATURE_AUTOMATIC_GAIN (1 << 6) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ #define FEATURE_DELAY (1 << 7) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ #define FEATURE_BASS_BOOST (1 << 8) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ #define FEATURE_BASS_LOUDNESS (1 << 9) - //@} - //@{ - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_UNDEFINED 0x0100 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_STREAMING 0x0101 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_VENDOR 0x01FF + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_IN_UNDEFINED 0x0200 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_IN_MIC 0x0201 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_IN_DESKTOP_MIC 0x0202 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_IN_PERSONAL_MIC 0x0203 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_IN_OMNIDIR_MIC 0x0204 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_IN_MIC_ARRAY 0x0205 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_IN_PROCESSING_MIC 0x0206 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_IN_OUT_UNDEFINED 0x0300 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_OUT_SPEAKER 0x0301 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_OUT_HEADPHONES 0x0302 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_OUT_HEAD_MOUNTED 0x0303 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_OUT_DESKTOP 0x0304 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_OUT_ROOM 0x0305 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_OUT_COMMUNICATION 0x0306 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ #define TERMINAL_OUT_LOWFREQ 0x0307 - //@} /** Convenience macro, to fill a 24-bit AudioSampleFreq_t structure with the given sample rate as a 24-bit number. * * \param freq Required audio sampling frequency in HZ */ - #define SAMPLE_FREQ(freq) {LowWord: ((uint32_t)freq & 0x00FFFF), HighByte: (((uint32_t)freq >> 16) & 0x0000FF)} + #define AUDIO_SAMPLE_FREQ(freq) {LowWord: ((uint32_t)freq & 0x00FFFF), HighByte: (((uint32_t)freq >> 16) & 0x0000FF)} /** Mask for the attributes parameter of an Audio class specific Endpoint descriptor, indicating that the endpoint * accepts only filled endpoint packets of audio samples. @@ -275,30 +361,125 @@ uint16_t LockDelay; /**< Time required to internally lock endpoint's internal clock recovery circuitry */ } USB_AudioStreamEndpoint_Spc_t; + /** Type define for an Audio Class interface configuration and state structure. This structure should be used for each Audio + * Class unit within the device, and passed (per-interface) to the Audio Class driver functions so that each Audio interface + * has seperate state and configuration data and can be controlled seperately. + */ typedef struct { - uint8_t InterfaceNumber; + uint8_t StreamingInterfaceNumber; /**< Index of the Audio Streaming interface within the device this structure controls */ - uint8_t DataINEndpointNumber; - uint16_t DataINEndpointSize; + uint8_t DataINEndpointNumber; /**< Endpoint number of the incomming Audio Streaming data, if available (zero if unused) */ + uint16_t DataINEndpointSize; /**< Size in bytes of the incomming Audio Streaming data endpoint, if available (zero if unused) */ - uint8_t DataOUTEndpointNumber; - uint16_t DataOUTEndpointSize; + uint8_t DataOUTEndpointNumber; /**< Endpoint number of the outgoing Audio Streaming data, if available (zero if unused) */ + uint16_t DataOUTEndpointSize; /**< Size in bytes of the outgoing Audio Streaming data endpoint, if available (zero if unused) */ - bool InterfaceEnabled; + bool InterfaceEnabled; /**< Set and cleared by the class driver to indicate if the host has enabled the streaming endpoints + * of the Audio Streaming interface + */ } USB_ClassInfo_Audio_t; /* Function Prototypes: */ - bool USB_Audio_ConfigureEndpoints(USB_ClassInfo_Audio_t* AudioInterfaceInfo); - void USB_Audio_ProcessControlPacket(USB_ClassInfo_Audio_t* AudioInterfaceInfo); - void USB_Audio_USBTask(USB_ClassInfo_Audio_t* AudioInterfaceInfo); + /** Configures the endpoints of a given Audio interface, ready for use. This should be linked to the library + * \ref EVENT_USB_ConfigurationChanged() event so that the endpoints are configured when the configuration containing the + * given Audio interface is selected. + * + * \param AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state. + * + * \return Boolean true if the endpoints were sucessfully configured, false otherwise + */ + bool USB_Audio_ConfigureEndpoints(USB_ClassInfo_Audio_t* AudioInterfaceInfo); + + /** Processes incomming control requests from the host, that are directed to the given Audio class interface. This should be + * linked to the library \ref EVENT_USB_UnhandledControlPacket() event. + * + * \param AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state. + */ + void USB_Audio_ProcessControlPacket(USB_ClassInfo_Audio_t* AudioInterfaceInfo); + + /** General management task for a given Audio class interface, required for the correct operation of the interface. This should + * be called frequently in the main program loop, before the master USB management task \ref USB_USBTask(). + * + * \param AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state. + */ + void USB_Audio_USBTask(USB_ClassInfo_Audio_t* AudioInterfaceInfo); + + /** Reads the next 8-bit audio sample from the current audio interface. + * + * \note This should be preceeded immediately by a call to the USB_Audio_IsSampleReceived() function to ensure that + * the correct endpoint is selected and ready for data. + * + * \return Signed 8-bit audio sample from the audio interface + */ + int8_t USB_Audio_ReadSample8(void); + + /** Reads the next 16-bit audio sample from the current audio interface. + * + * \note This should be preceeded immediately by a call to the USB_Audio_IsSampleReceived() function to ensure that + * the correct endpoint is selected and ready for data. + * + * \return Signed 16-bit audio sample from the audio interface + */ + int16_t USB_Audio_ReadSample16(void); + + /** Reads the next 24-bit audio sample from the current audio interface. + * + * \note This should be preceeded immediately by a call to the USB_Audio_IsSampleReceived() function to ensure that + * the correct endpoint is selected and ready for data. + * + * \return Signed 24-bit audio sample from the audio interface + */ + int32_t USB_Audio_ReadSample24(void); + + /** Writes the next 8-bit audio sample to the current audio interface. + * + * \note This should be preceeded immediately by a call to the USB_Audio_IsReadyForNextSample() function to ensure that + * the correct endpoint is selected and ready for data. + * + * \param Sample Signed 8-bit audio sample + */ + void USB_Audio_WriteSample8(int8_t Sample); + + /** Writes the next 16-bit audio sample to the current audio interface. + * + * \note This should be preceeded immediately by a call to the USB_Audio_IsReadyForNextSample() function to ensure that + * the correct endpoint is selected and ready for data. + * + * \param Sample Signed 16-bit audio sample + */ + void USB_Audio_WriteSample16(int16_t Sample); + + /** Writes the next 24-bit audio sample to the current audio interface. + * + * \note This should be preceeded immediately by a call to the USB_Audio_IsReadyForNextSample() function to ensure that + * the correct endpoint is selected and ready for data. + * + * \param Sample Signed 24-bit audio sample + */ + void USB_Audio_WriteSample24(int32_t Sample); + + /** Determines if the given audio interface is ready for a sample to be read from it. + * + * \param AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state. + * + * \return Boolean true if the given Audio interface has a sample to be read, false otherwise + */ + bool USB_Audio_IsSampleReceived(USB_ClassInfo_Audio_t* AudioInterfaceInfo); + + /** Determines if the given audio interface is ready to accept the next sample to be written to it. + * + * \param AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state. + * + * \return Boolean true if the given Audio interface is ready to accept the next sample, false otherwise + */ + bool USB_Audio_IsReadyForNextSample(USB_ClassInfo_Audio_t* AudioInterfaceInfo); + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif - int8_t USB_Audio_ReadSample8(void); - int16_t USB_Audio_ReadSample16(void); - int32_t USB_Audio_ReadSample24(void); - void USB_Audio_WriteSample8(int8_t Sample); - void USB_Audio_WriteSample16(int16_t Sample); - void USB_Audio_WriteSample24(int32_t Sample); - bool USB_Audio_IsSampleReceived(USB_ClassInfo_Audio_t* AudioInterfaceInfo); - bool USB_Audio_IsReadyForNextSample(USB_ClassInfo_Audio_t* AudioInterfaceInfo); #endif + +/** @} */