usbh_uac.h

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#ifndef __INCLUDED_USBHUAC_H__
#define __INCLUDED_USBHUAC_H__
 
#include "usbh_core.h"
 
 
#define CONFIG_AU_MAX_DEV            1      
#define MAX_CFG_DESC_SIZE            256    
#define MAX_FEATURE_UNIT             8      
#define ISO_IN_URB_CNT               2      
#define ISO_OUT_URB_CNT              2      
#define AU_IN_MAX_PKTSZ              128    
#define AU_OUT_MAX_PKTSZ             256    
#define UAC_REQ_TIMEOUT              10000  
#define UAC_SPEAKER                  1      
#define UAC_MICROPHONE               2      
/*
 * Constants
 */
#define UAC_RET_OK                   0      
#define UAC_RET_DEV_NOT_FOUND        -9     
#define UAC_RET_IO_ERR               -11    
#define UAC_RET_INVALID              -13    
#define UAC_RET_OUT_OF_MEMORY        -15    
#define UAC_RET_DRV_NOT_SUPPORTED    -17    
#define UAC_RET_DEV_NOT_SUPPORTED    -19    
/*
 * Audio Class-Specific Request Codes
 */
#define UAC_SET_CUR                  0x01   
#define UAC_GET_CUR                  0x81   
#define UAC_SET_MIN                  0x02   
#define UAC_GET_MIN                  0x82   
#define UAC_SET_MAX                  0x03   
#define UAC_GET_MAX                  0x83   
#define UAC_SET_RES                  0x04   
#define UAC_GET_RES                  0x84   
#define UAC_GET_STAT                 0xFF   
/*
 * Audio Class-Specific Channel selection
 */
#define UAC_CH_MASTER                0      
#define UAC_CH_LEFT_FRONT            1      
#define UAC_CH_RIGHT_FRONT           2      
#define UAC_CH_CENTER_FRONT          3      
#define UAC_CH_LOW_FREQ_EN           4      
#define UAC_CH_LEFT_SRN              5      
#define UAC_CH_RIGHT_SRN             6      
#define UAC_CH_LEFT_OF_CENTER        7      
#define UAC_CH_RIGHT_OF_CENTER       8      
#define UAC_CH_SURROUND              9      
#define UAC_CH_SIDE_LEFT             10     
#define UAC_CH_SIDE_RIGHT            11     
#define UAC_CH_TOP                   12      /* end of group USBH_AS_EXPORTED_CONSTANTS */
 
struct uac_dev_t;
 
 
typedef int (UAC_CB_FUNC)(struct uac_dev_t *dev, uint8_t *data, int len);     /* end of group USBH_AS_EXPORTED_TYPEDEFS */
 
 
/*-----------------------------------------------------------------------------------
 *  Audio Class device
 */
typedef struct uac_dev_t
{
    USB_DEV_T           *udev;          
    int                 ctrl_ifnum;     
    int                 au_in_ifnum;    
    int                 au_out_ifnum;   
    void                *priv;          
    struct uac_dev_t    *next;          
    /*
     *  The followings are used for audio streaming.
     */
    EP_INFO_T           *ep_au_in;      
    EP_INFO_T           *ep_au_out;     
    URB_T *             urbin[ISO_IN_URB_CNT];       
    URB_T *             urbout[ISO_OUT_URB_CNT];     
    uint8_t             iso_inbuf[ISO_IN_URB_CNT][AU_IN_MAX_PKTSZ*ISO_FRAME_COUNT];    
    uint8_t             iso_outbuf[ISO_OUT_URB_CNT][AU_OUT_MAX_PKTSZ*ISO_FRAME_COUNT]; 
    uint8_t             in_streaming;   
    uint8_t             out_streaming;  
    /*
     *  The followings are used for interworking with user application.
     */
    UAC_CB_FUNC         *au_in_func;    
    UAC_CB_FUNC         *au_out_func;   
    uint8_t             *au_in_buff;    
    int                 au_in_bufsz;    
    int                 au_in_bufidx;   
} UAC_DEV_T;                              /* end of group USBH_AS_EXPORTED_STRUCTURES */
 
 
#ifdef __cplusplus
extern "C" {
#endif
 
void     UAC_Init(void);
UAC_DEV_T * UAC_GetDeviceList(void);
 
int32_t  UAC_GetChannelNumber(UAC_DEV_T *audev, uint8_t target);
int32_t  UAC_GetBitResolution(UAC_DEV_T *audev, uint8_t target, uint8_t *val8);
int32_t  UAC_GetSamplingRate(UAC_DEV_T *audev, uint8_t target, uint32_t *srate_list, int max_cnt, uint8_t *type);
int32_t  UAC_MuteControl(UAC_DEV_T *audev, uint8_t target, uint8_t req, uint16_t chn, uint8_t *data);
int32_t  UAC_VolumeControl(UAC_DEV_T *audev, uint8_t target, uint8_t req, uint16_t chn, uint16_t *volume);
int32_t  UAC_AutoGainControl(UAC_DEV_T *audev, uint8_t target, uint8_t req, uint16_t chn, uint8_t *gain);
int32_t  UAC_SamplingRateControl(UAC_DEV_T *audev, uint8_t target, uint8_t req, uint32_t *srate);
 
int32_t  UAC_InstallIsoInCbFun(UAC_DEV_T *audev, uint8_t *au_in_buff, int bufsiz, UAC_CB_FUNC *func);
int32_t  UAC_StartIsoInPipe(UAC_DEV_T *audev);
int32_t  UAC_StopIsoInPipe(UAC_DEV_T *audev);
 
int32_t  UAC_InstallIsoOutCbFun(UAC_DEV_T *audev, UAC_CB_FUNC *func);
int32_t  UAC_StartIsoOutPipe(UAC_DEV_T *audev);
int32_t  UAC_StopIsoOutPipe(UAC_DEV_T *audev);
 
 /* end of group USBH_AS_EXPORTED_FUNCTIONS */
 /* end of group USBH_AS_Driver */
 /* end of group USB_Host_Driver */
 /* end of group Component_Library */
 
#ifdef __cplusplus
}
#endif
 
#endif /* __INCLUDED_USBHUAC_H__ */