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This file is part of Open Sound System.
Copyright (C) 4Front Technologies 1996-2008.
This this source file is released under GPL v2 license (no other versions). See the COPYING file included in the main directory of this source distribution for the license terms and conditions.
#ifndef __OSUSB_H_ #define __OSUSB_H_ #include "udi.h" #include "midi_core.h" #define CS_DEVICE 0x21 #define CS_CONFIG 0x22 #define CS_STRING 0x23 #define CS_INTERFACE 0x24 #define CS_ENDPOINT 0x25 #define AC_HEADER 0x01 #define AC_INPUT_TERMINAL 0x02 #define AC_OUTPUT_TERMINAL 0x03 #define AC_MIXER_UNIT 0x04 #define AC_SELECTOR_UNIT 0x05 #define AC_FEATURE_UNIT 0x06 #define AC_PROCESSING_UNIT 0x07 #define AC_EXTENSION_UNIT 0x08 #define AS_GENERAL 0x01 #define AS_FORMAT_TYPE 0x02 #define AS_FORMAT_SPECIFIC 0x03 #define SET_CUR 0x01 #define SET_MEM 0x05 #define GET_CUR 0x81 #define GET_MIN 0x82 #define GET_MAX 0x83 #define GET_RES 0x84 #define GET_MEM 0x85 #define GET_STAT 0xff #define USB_RECIP_MASK 0x1f #define USB_RECIP_DEVICE 0x00 #define USB_RECIP_INTERFACE 0x01 #define USB_RECIP_ENDPOINT 0x02 #define USB_RECIP_OTHER 0x03 #define USB_VENDOR_REQUEST 0x40 #define USB_TYPE_CLASS 0x20
Unit types
Note that TY_OUTPUT is actually PCM input and TY_INPUT is actually PCM output. Unit types are defined as seen as the USB control interface. Input terminals listen to the output streaming interfases and output terminals feed the input streaming interfaces. Confusing it is.
#define TY_INPUT 0
#define TY_OUTPUT 1
#define TY_MIXER 2
#define TY_SELECT 3
#define TY_FEAT 4
#define TY_PROC 5
#define TY_EXT 6
// Remember to inclease size of devc->unit_counters[] if adding more unit types
#define USBCLASS_AUDIO 1
#define USBCLASS_HID 3
#define MAX_IFACE 10
typedef struct
{
int num;
int typ; // TY_*
int subtyp;
char name[16];
unsigned char *desc;
int desclen;
int mixnum;
int target;
int source;
int ctl_avail;
int control_count;
int channels;
int chmask;
} usb_audio_unit_t;
#define MAX_UNIT 40
#define MAX_CONTROLS 100
#define MAX_PORTC 8 /* Max audio streaming interfaces per device */
#define MAX_MIDIC 16 /* Max MIDI streaming interfaces per device */
typedef struct
{
usb_audio_unit_t *unit;
int index;
int flags;
int min_ch, max_ch;
int global;
int chmask;
int value;
int min, max, scale;
int exttype;
} usb_control_t;
typedef struct ossusb_devc ossusb_devc;
typedef struct
{
ossusb_devc *devc;
int disabled;
int if_number;
void *endpoint_desc, *orig_endpoint_desc;
udi_endpoint_handle_t *endpoint_handle;
int audio_dev;
int open_mode;
int permitted_modes;
int prepared_modes;
int stopping;
int speed;
int bytes_per_sample;
int terminal_link;
udi_usb_devc *usbdev;
int num_settings;
int act_setting;
#define NR_DATAPIPES 2
udi_usb_request_t *datapipe[NR_DATAPIPES];
int curr_datapipe;
int fragment_size; /* Bytes per (1ms) USB tick */
int overflow_samples, overflow_size;
int convert_3byte;
int pipeline_delay;
unsigned char *tmp_buf[2];
int use_tmpbuf;
oss_dma_handle_t tmpbuf_dma_handle[2];
} ossusb_portc;
typedef struct
{
struct ossusb_devc *devc;
oss_device_t *osdev;
udi_usb_devc *usbdev;
void *in_endpoint_desc, *out_endpoint_desc;
udi_endpoint_handle_t *in_endpoint_handle, *out_endpoint_handle;
int portnum;
int midi_dev;
int open_mode;
// int output_endpoint;
oss_midi_inputbyte_t midi_input_intr;
oss_midi_outputintr_t midi_output_intr;
} ossusb_midic;
typedef void *(*special_driver_t) (ossusb_devc * devc);
typedef void (*special_unload_t) (void *devc);
struct ossusb_devc
{
special_unload_t unload_func;
oss_device_t *osdev;
oss_device_t *main_osdev;
oss_mutex_t mutex;
int num_interfaces;
udi_usb_devc *usbdev[MAX_IFACE], *last_usbdev;
int inum[MAX_IFACE];
int vendor, product;
char *dev_name, devpath[32];
int nports;
int disabled;
Units
usb_audio_unit_t units[MAX_UNIT]; int nunits; char unit_counters[7]; // For TY_* identifiers
Mixer stuff
int mixer_dev;
void *mixer_usbdev;
int devmask, recmask, stereodevs, recsrc;
int rec_unit;
int num_recdevs;
int recdevs[32];
int *levels;
usb_control_t controls[MAX_CONTROLS];
int ncontrols;
/* Audio stuff */
int num_audio_engines, num_inputs, num_outputs;
ossusb_portc portc[MAX_PORTC];
/* MIDI stuff */
int num_mididevs;
ossusb_midic midic[MAX_MIDIC];
unsigned char *playbuf;
oss_dma_handle_t playbuf_dma_handle;
udi_usb_request_t *output_pipe;
int output_busy;
#define Q_MAX 4096
unsigned char queue[Q_MAX];
int q_nbytes;
unsigned char *recbuf;
oss_dma_handle_t recbuf_dma_handle;
udi_usb_request_t *input_pipe;
udi_endpoint_handle_t *input_endpoint_handle;
};
extern int usb_trace, usb_quiet;
#define UDB(x) {if (usb_trace) x;}
extern ossusb_devc *ossusb_init_audiostream (ossusb_devc * devc,
udi_usb_devc * usbdev, int inum,
int reinit);
extern ossusb_devc *ossusb_init_midistream (ossusb_devc * devc,
udi_usb_devc * usbdev, int inum,
int reinit);
extern void ossusb_disconnect_midistream (ossusb_devc * devc);
extern void ossusb_dump_desc (unsigned char *desc, int cfg_len);
extern unsigned int ossusb_get_int (unsigned char *p, int nbytes);
extern int ossusb_change_altsetting (int dev, int ctrl, unsigned int cmd,
int value);
extern void ossusb_create_altset_control(int dev, int portc_num, int nalt, char *name);
#endif