wavefront.h

linux得一些常用命令,以及linux环境下的c编程

/* pseudo's */

#define WF_ST_DRUM        4
#define WF_ST_PROGRAM     5
#define WF_ST_PATCH       6
#define WF_ST_SAMPLEHDR   7

#define WF_ST_MASK        0xf

/* Flags for slot status. These occupy the upper bits of the same byte
   as a sample type.
*/

#define WF_SLOT_USED      0x80   /* XXX don't rely on this being accurate */
#define WF_SLOT_FILLED    0x40
#define WF_SLOT_ROM       0x20

#define WF_SLOT_MASK      0xf0

/* channel constants */

#define WF_CH_MONO  0
#define WF_CH_LEFT  1
#define WF_CH_RIGHT 2

/* Sample formats */

#define LINEAR_16BIT 0
#define WHITE_NOISE  1
#define LINEAR_8BIT  2
#define MULAW_8BIT   3

#define WF_SAMPLE_IS_8BIT(smpl) ((smpl)->SampleResolution&2)


/* 

  Because most/all of the sample data we pass in via pointers has
  never been copied (just mmap-ed into user space straight from the
  disk), it would be nice to allow handling of multi-channel sample
  data without forcing user-level extraction of the relevant bytes.
  
  So, we need a way of specifying which channel to use (the WaveFront
  only handles mono samples in a given slot), and the only way to do
  this without using some struct other than wavefront_sample as the
  interface is the awful hack of using the unused bits in a
  wavefront_sample:
  
  Val      Meaning
  ---      -------
  0        no channel selection (use channel 1, sample is MONO)
  1        use first channel, and skip one
  2        use second channel, and skip one
  3        use third channel, and skip two
  4        use fourth channel, skip three
  5        use fifth channel, skip four
  6        use six channel, skip five


  This can handle up to 4 channels, and anyone downloading >4 channels
  of sample data just to select one of them needs to find some tools
  like sox ...

  NOTE: values 0, 1 and 2 correspond to WF_CH_* above. This is 
  important.

*/

#define WF_SET_CHANNEL(samp,chn) \
 (samp)->Unused1 = chn & 0x1; \
 (samp)->Unused2 = chn & 0x2; \
 (samp)->Unused3 = chn & 0x4 
  
#define WF_GET_CHANNEL(samp) \
  (((samp)->Unused3 << 2)|((samp)->Unused2<<1)|(samp)->Unused1)
  
typedef struct wf_sample {
    struct wf_sample_offset sampleStartOffset;
    struct wf_sample_offset loopStartOffset;
    struct wf_sample_offset loopEndOffset;
    struct wf_sample_offset sampleEndOffset;
    INT16 FrequencyBias;
    UCHAR8 SampleResolution:2;  /* sample_format */
    UCHAR8 Unused1:1;
    UCHAR8 Loop:1;
    UCHAR8 Bidirectional:1;
    UCHAR8 Unused2:1;
    UCHAR8 Reverse:1;
    UCHAR8 Unused3:1;
} wavefront_sample;

typedef struct wf_multisample {
    INT16 NumberOfSamples;   /* log2 of the number of samples */
    INT16 SampleNumber[NUM_MIDIKEYS];
} wavefront_multisample;

typedef struct wf_alias {
    INT16 OriginalSample __attribute__ ((packed));

    struct wf_sample_offset sampleStartOffset __attribute__ ((packed));
    struct wf_sample_offset loopStartOffset __attribute__ ((packed));
    struct wf_sample_offset sampleEndOffset __attribute__ ((packed));
    struct wf_sample_offset loopEndOffset __attribute__ ((packed));

    INT16  FrequencyBias __attribute__ ((packed));

    UCHAR8 SampleResolution:2  __attribute__ ((packed));
    UCHAR8 Unused1:1  __attribute__ ((packed));
    UCHAR8 Loop:1 __attribute__ ((packed));
    UCHAR8 Bidirectional:1  __attribute__ ((packed));
    UCHAR8 Unused2:1 __attribute__ ((packed));
    UCHAR8 Reverse:1 __attribute__ ((packed));
    UCHAR8 Unused3:1 __attribute__ ((packed)); 
    
    /* This structure is meant to be padded only to 16 bits on their
       original. Of course, whoever wrote their documentation didn't
       realize that sizeof(struct) can be >=
       sum(sizeof(struct-fields)) and so thought that giving a C level
       description of the structs used in WavePatch files was
       sufficient. I suppose it was, as long as you remember the 
       standard 16->32 bit issues.
    */

    UCHAR8 sixteen_bit_padding __attribute__ ((packed));
} wavefront_alias;

typedef struct wf_drum {
    UCHAR8 PatchNumber;
    UCHAR8 MixLevel:7;
    UCHAR8 Unmute:1;
    UCHAR8 Group:4;
    UCHAR8 Unused1:4;
    UCHAR8 PanModSource:2;
    UCHAR8 PanModulated:1;
    UCHAR8 PanAmount:4;
    UCHAR8 Unused2:1;
} wavefront_drum;

typedef struct wf_drumkit {
    struct wf_drum drum[NUM_MIDIKEYS];
} wavefront_drumkit;

typedef struct wf_channel_programs {
    UCHAR8 Program[NUM_MIDICHANNELS];
} wavefront_channel_programs;

/* How to get MIDI channel status from the data returned by
   a WFC_GET_CHANNEL_STATUS command (a struct wf_channel_programs)
*/

#define WF_CHANNEL_STATUS(ch,wcp) (wcp)[(ch/7)] & (1<<((ch)%7))

typedef union wf_any {
    wavefront_sample s;
    wavefront_multisample ms;
    wavefront_alias a;
    wavefront_program pr;
    wavefront_patch p;
    wavefront_drum d;
} wavefront_any;

/* Hannu Solvainen hoped that his "patch_info" struct in soundcard.h
   might work for other wave-table based patch loading situations.
   Alas, his fears were correct. The WaveFront doesn't even come with
   just "patches", but several different kind of structures that
   control the sound generation process.
 */

typedef struct wf_patch_info {
    
    /* the first two fields are used by the OSS "patch loading" interface
       only, and are unused by the current user-level library.
    */

    INT16   key;               /* Use WAVEFRONT_PATCH here */
    UINT16  devno;             /* fill in when sending */
    UCHAR8  subkey;            /* WF_ST_{SAMPLE,ALIAS,etc.} */

#define WAVEFRONT_FIND_FREE_SAMPLE_SLOT 999

    UINT16  number;            /* patch/sample/prog number */

    UINT32  size;              /* size of any data included in 
				  one of the fields in `hdrptr', or
				  as `dataptr'.

				  NOTE: for actual samples, this is
				  the size of the *SELECTED CHANNEL*
				  even if more data is actually available.
				  
				  So, a stereo sample (2 channels) of
				  6000 bytes total has `size' = 3000.

				  See the macros and comments for
				  WF_{GET,SET}_CHANNEL above.

			       */
    wavefront_any *hdrptr;      /* user-space ptr to hdr bytes */
    UINT16 *dataptr;            /* actual sample data */

    wavefront_any hdr;          /* kernel-space copy of hdr bytes */         
} wavefront_patch_info;

/* The maximum number of bytes we will ever move to or from user space
   in response to a WFC_* command.  This obviously doesn't cover
   actual sample data.
*/

#define WF_MAX_READ sizeof(wavefront_multisample)
#define WF_MAX_WRITE sizeof(wavefront_multisample)

/*
   This allows us to execute any WF command except the download/upload
   ones, which are handled differently due to copyin/copyout issues as
   well as data-nybbling to/from the card.
 */

typedef struct wavefront_control {
    int cmd;                           /* WFC_* */
    char status;                       /* return status to user-space */
    unsigned char rbuf[WF_MAX_READ];   /* bytes read from card */
    unsigned char wbuf[WF_MAX_WRITE];  /* bytes written to card */
} wavefront_control;

#define WFCTL_WFCMD    0x1
#define WFCTL_LOAD_SPP 0x2

/* Modulator table */

#define WF_MOD_LFO1      0
#define WF_MOD_LFO2      1
#define WF_MOD_ENV1      2
#define WF_MOD_ENV2      3
#define WF_MOD_KEYBOARD  4
#define WF_MOD_LOGKEY    5
#define WF_MOD_VELOCITY  6
#define WF_MOD_LOGVEL    7
#define WF_MOD_RANDOM    8
#define WF_MOD_PRESSURE  9
#define WF_MOD_MOD_WHEEL 10
#define WF_MOD_1         WF_MOD_MOD_WHEEL 
#define WF_MOD_BREATH    11
#define WF_MOD_2         WF_MOD_BREATH
#define WF_MOD_FOOT      12
#define WF_MOD_4         WF_MOD_FOOT
#define WF_MOD_VOLUME    13
#define WF_MOD_7         WF_MOD_VOLUME
#define WF_MOD_PAN       14
#define WF_MOD_10        WF_MOD_PAN
#define WF_MOD_EXPR      15
#define WF_MOD_11        WF_MOD_EXPR

/* FX-related material */

typedef struct wf_fx_info {
    int request;             /* see list below */
    int data[4];             /* we don't need much */
} wavefront_fx_info;

/* support for each of these will be forthcoming once I or someone 
   else has figured out which of the addresses on page 6 and page 7 of 
   the YSS225 control each parameter. Incidentally, these come from
   the Windows driver interface, but again, Turtle Beach didn't
   document the API to use them.
*/

#define WFFX_SETOUTGAIN		        0
#define WFFX_SETSTEREOOUTGAIN		1
#define WFFX_SETREVERBIN1GAIN		2
#define WFFX_SETREVERBIN2GAIN		3
#define WFFX_SETREVERBIN3GAIN		4
#define WFFX_SETCHORUSINPORT		5
#define WFFX_SETREVERBIN1PORT		6
#define WFFX_SETREVERBIN2PORT		7
#define WFFX_SETREVERBIN3PORT		8
#define WFFX_SETEFFECTPORT		9
#define WFFX_SETAUXPORT		        10
#define WFFX_SETREVERBTYPE		11
#define WFFX_SETREVERBDELAY		12
#define WFFX_SETCHORUSLFO		13
#define WFFX_SETCHORUSPMD		14
#define WFFX_SETCHORUSAMD		15
#define WFFX_SETEFFECT		        16
#define WFFX_SETBASEALL		        17
#define WFFX_SETREVERBALL		18
#define WFFX_SETCHORUSALL		20
#define WFFX_SETREVERBDEF		22
#define WFFX_SETCHORUSDEF		23
#define WFFX_DELAYSETINGAIN		24
#define WFFX_DELAYSETFBGAIN	        25
#define WFFX_DELAYSETFBLPF		26
#define WFFX_DELAYSETGAIN		27
#define WFFX_DELAYSETTIME		28
#define WFFX_DELAYSETFBTIME		29
#define WFFX_DELAYSETALL		30
#define WFFX_DELAYSETDEF		32
#define WFFX_SDELAYSETINGAIN		33
#define WFFX_SDELAYSETFBGAIN		34
#define WFFX_SDELAYSETFBLPF		35
#define WFFX_SDELAYSETGAIN		36
#define WFFX_SDELAYSETTIME		37
#define WFFX_SDELAYSETFBTIME		38
#define WFFX_SDELAYSETALL		39
#define WFFX_SDELAYSETDEF		41
#define WFFX_DEQSETINGAIN		42
#define WFFX_DEQSETFILTER		43
#define WFFX_DEQSETALL		        44
#define WFFX_DEQSETDEF		        46
#define WFFX_MUTE		        47
#define WFFX_FLANGESETBALANCE	        48	
#define WFFX_FLANGESETDELAY		49
#define WFFX_FLANGESETDWFFX_TH		50
#define WFFX_FLANGESETFBGAIN		51
#define WFFX_FLANGESETINGAIN		52
#define WFFX_FLANGESETLFO		53
#define WFFX_FLANGESETALL		54
#define WFFX_FLANGESETDEF		56
#define WFFX_PITCHSETSHIFT		57
#define WFFX_PITCHSETBALANCE		58
#define WFFX_PITCHSETALL		59
#define WFFX_PITCHSETDEF		61
#define WFFX_SRSSETINGAIN		62
#define WFFX_SRSSETSPACE		63
#define WFFX_SRSSETCENTER		64
#define WFFX_SRSSETGAIN		        65
#define WFFX_SRSSETMODE	        	66
#define WFFX_SRSSETDEF		        68

/* Allow direct user-space control over FX memory/coefficient data.
   In theory this could be used to download the FX microprogram,
   but it would be a little slower, and involve some weird code.
 */

#define WFFX_MEMSET              69

#endif /* __wavefront_h__ */