workbench/devs/AHI/Include/Asm/devices/ahi.i

   1         IFND DEVICES_AHI_I
   2 DEVICES_AHI_I           SET     1
   3
   4 **
   5 **      $VER: ahi.i 6.0 (02.02.2005)
   6 **      :ts=8 (TAB SIZE: 8)
   7 **
   8 **      ahi.device definitions
   9 **
  10 **      (C) Copyright 1994-2005 Martin Blom
  11 **      All Rights Reserved.
  12 **
  13 **
  14
  15 *------------------------------------------------------------------------*
  16
  17
  18         IFND EXEC_TYPES_I
  19         INCLUDE 'exec/types.i'
  20         ENDC
  21
  22         IFND EXEC_IO_I
  23         INCLUDE 'exec/io.i'
  24         ENDC
  25
  26         IFND UTILITY_TAGITEM_I
  27         INCLUDE 'utility/tagitem.i'
  28         ENDC
  29
  30 *------------------------------------------------------------------------*
  31
  32
  33 *** MACROS
  34
  35 Fixed   MACRO                                   ; A fixed-point value, 16 bits
  36 \1          EQU     SOFFSET                     ; to the left of the point and
  37 SOFFSET     SET     SOFFSET+4                   ; 16 bits to the right
  38             ENDM
  39
  40 AHINAME MACRO
  41         dc.b    "ahi.device",0
  42         ENDM
  43
  44  ; A handy macro to open the device for use as a library.
  45  ; Usage:  OPENAHI <version>
  46  ; On exit: d0=_AHIBase or NULL for error.
  47
  48 OPENAHI MACRO
  49         movem.l d1/a0-a1/a6,-(sp)
  50         lea     AHI_PORT(pc),a0
  51         clr.l   (a0)+
  52         clr.l   (a0)+
  53         moveq   #0,d0
  54         move.l  d0,(a0)+
  55
  56         move.l  4.w,a6
  57         jsr     _LVOCreateMsgPort(a6)
  58         lea     AHI_PORT(pc),a0
  59         move.l  d0,(a0)
  60         beq.b   AHI_ERROR
  61         move.l  d0,a0
  62         moveq   #AHIRequest_SIZEOF,d0
  63         jsr     _LVOCreateIORequest(a6)
  64         lea     AHI_IOR(pc),a0
  65         move.l  d0,(a0)
  66         beq.b   AHI_ERROR
  67         lea     AHI_NAME(pc),a0
  68         move.l  d0,a1
  69         move.w  #\1,ahir_Version(a1)
  70         move.l  #AHI_NO_UNIT,d0
  71         moveq   #0,d1
  72         jsr     _LVOOpenDevice(a6)
  73         lea     AHI_DEVICE(pc),a0
  74         move.l  d0,(a0)
  75         bne.b   AHI_ERROR
  76
  77         move.l  AHI_IOR(PC),a0
  78         move.l  IO_DEVICE(a0),d0
  79         bra.b   AHI_EXIT
  80
  81 AHI_PORT:       dc.l    0
  82 AHI_IOR:        dc.l    0
  83 AHI_DEVICE:     dc.l    0
  84 AHI_NAME:       AHINAME
  85         even
  86 AHI_ERROR:
  87         moveq   #0,D0
  88 AHI_EXIT:
  89         movem.l (sp)+,d1/a0-a1/a6
  90         ENDM
  91
  92  ; Here is the macro for closing the device after it has been
  93  ; opened with the OPENAHI macro. Call CLOSEAHI even if OPENAHI
  94  ; failed!
  95
  96 CLOSEAHI MACRO
  97         movem.l d0-d1/a0-a1/a6,-(sp)
  98         move.l  4.w,a6
  99         lea     AHI_DEVICE(pc),a1
 100         tst.l   (a1)
 101         bne.b   .ahi_nodevice
 102         subq.l  #1,(a1)
 103         move.l  AHI_IOR(pc),a1
 104         jsr     _LVOCloseDevice(a6)
 105         lea     AHI_IOR(pc),a1
 106         move.l  (a1),a0
 107         clr.l   (a1)
 108         jsr     _LVODeleteIORequest(a6)
 109 .ahi_nodevice
 110         lea     AHI_PORT(pc),a1
 111         move.l  (a1),a0
 112         clr.l   (a1)
 113         jsr     _LVODeleteMsgPort(a6)
 114         movem.l (sp)+,d0-d1/a0-a1/a6
 115         ENDM
 116
 117 *** STRUCTURES
 118
 119  ; AHIAudioCtrl
 120         STRUCTURE AHIAudioCtrl,0
 121         APTR    ahiac_UserData
 122         ; Lots of private data follows!
 123         LABEL   AHIAudioCtrl_SIZEOF             ; Do not use!
 124
 125  ; AHISoundMessage
 126         STRUCTURE AHISoundMessage,0
 127         UWORD   ahism_Channel
 128         LABEL   AHISoundMessage_SIZEOF
 129
 130  ; AHIRecordMessage
 131         STRUCTURE AHIRecordMessage,0
 132         ULONG   ahirm_Type                      ; Format of buffer (object)
 133         APTR    ahirm_Buffer                    ; Pointer to the sample array
 134         ULONG   ahirm_Length                    ; Number of sample frames in buffer
 135         LABEL   AHIRecordMessage_SIZEOF
 136
 137  ; AHISampleInfo
 138         STRUCTURE AHISampleInfo,0
 139         ULONG   ahisi_Type                      ; Format of samples
 140         APTR    ahisi_Address                   ; Address to array of samples
 141         ULONG   ahisi_Length                    ; Number of samples in array
 142         LABEL   AHISampleInfo_SIZEOF
 143
 144  ; AHIAudioModeRequester
 145         STRUCTURE AHIAudioModeRequester,0
 146         ULONG   ahiam_AudioID;                  ; Selected audio mode
 147         ULONG   ahiam_MixFreq;                  ; Selected mixing/sampling frequency
 148
 149         WORD    ahiam_LeftEdge;                 ; Coordinates of requester on exit
 150         WORD    ahiam_TopEdge;
 151         WORD    ahiam_Width;
 152         WORD    ahiam_Height;
 153
 154         BOOL    ahiam_InfoOpened;               ; Info window opened on exit
 155         WORD    ahiam_InfoLeftEdge;             ; Last coordinates of Info window
 156         WORD    ahiam_InfoTopEdge;
 157         WORD    ahiam_InfoWidth;
 158         WORD    ahiam_InfoHeight;
 159
 160         UWORD   ahiam_ObsoleteUserData0;
 161         UWORD   ahiam_ObsoleteUserData1;
 162         UWORD   ahiam_Pad;
 163         APTR    ahiam_UserData;                 ; You can store your own data here (V6)
 164
 165         ; Lots of private data follows!
 166         LABEL   AHIAudioModeRequester_SIZEOF
 167
 168 ahie_Effect     EQU     0
 169
 170  ; AHIEffMasterVolume
 171         STRUCTURE AHIEffMasterVolume,0
 172         ULONG   ahiemv_Effect                   ; Set to AHIET_MASTERVOLUME
 173         Fixed   ahiemv_Volume                   ; See autodocs for range!
 174         LABEL   AHIEffMasterVolume_SIZEOF
 175
 176  ; AHIEffOutputBuffer
 177         STRUCTURE AHIEffOutputBuffer,0
 178         ULONG   ahieob_Effect                   ; Set to AHIET_OUTPUTBUFFER
 179         APTR    ahieob_Func
 180  ; These fields are filled by AHI
 181         ULONG   ahieob_Type                     ; Format of buffer
 182         APTR    ahieob_Buffer                   ; Pointer to the sample array
 183         ULONG   ahieob_Length                   ; Number of sample frames in buffer
 184         LABEL   AHIEffOutputBuffer_SIZEOF
 185
 186  ; AHIEffDSPMask (V4)
 187         STRUCTURE AHIEffDSPMask,0
 188         ULONG   ahiedm_Effect                   ; Set to AHIET_DSPMASK
 189         UWORD   ahiedm_Channels                 ; Number of elements in array
 190         LABEL   ahiedm_Mask                     ; Here follows the UBYTE array
 191         LABEL   AHIEffDSPMask_SIZEOF
 192
 193 AHIEDM_WET      EQU     0
 194 AHIEDM_DRY      EQU     1
 195
 196  ; AHIEffDSPEcho (V4)
 197         STRUCTURE AHIEffDSPEcho,0
 198         ULONG   ahiede_Effect                   ; Set to AHIET_DSPECHO
 199         ULONG   ahiede_Delay                    ; In samples
 200         Fixed   ahiede_Feedback
 201         Fixed   ahiede_Mix
 202         Fixed   ahiede_Cross
 203         LABEL   AHIEffDSPEcho_SIZEOF
 204
 205  ; AHIEffChannelInfo (V4)
 206         STRUCTURE AHIEffChannelInfo,0
 207         ULONG   ahieci_Effect                   ; Set to AHIET_CHANNELINFO
 208         APTR    ahieci_Func
 209         UWORD   ahieci_Channels
 210         UWORD   ahieci_Pad
 211  ; The rest is filled by AHI
 212         LABEL   ahieci_Offset                   ; The ULONG array follows
 213         LABEL   AHIEffChannelInfo_SIZEOF
 214
 215 *** TAGS
 216
 217 AHI_TagBase             EQU TAG_USER
 218 AHI_TagBaseR            EQU AHI_TagBase|$8000
 219
 220  ; AHI_AllocAudioA tags
 221 AHIA_AudioID            EQU AHI_TagBase+1       ; Desired audio mode
 222 AHIA_MixFreq            EQU AHI_TagBase+2       ; Suggested mixing frequency
 223 AHIA_Channels           EQU AHI_TagBase+3       ; Suggested number of channels
 224 AHIA_Sounds             EQU AHI_TagBase+4       ; Number of sounds to use
 225 AHIA_SoundFunc          EQU AHI_TagBase+5       ; End-of-Sound Hook
 226 AHIA_PlayerFunc         EQU AHI_TagBase+6       ; Player Hook
 227 AHIA_PlayerFreq         EQU AHI_TagBase+7       ; Frequency for player Hook (Fixed)
 228 AHIA_MinPlayerFreq      EQU AHI_TagBase+8       ; Minimum Frequency for player Hook
 229 AHIA_MaxPlayerFreq      EQU AHI_TagBase+9       ; Maximum Frequency for player Hook
 230 AHIA_RecordFunc         EQU AHI_TagBase+10      ; Sample recording Hook
 231 AHIA_UserData           EQU AHI_TagBase+11      ; What to put in ahiac_UserData
 232 AHIA_AntiClickSamples   EQU AHI_TagBase+13      ; # of samples to smooth (V6)
 233
 234   ; AHI_PlayA tags (V4)
 235 AHIP_BeginChannel       EQU AHI_TagBase+40      ; All command tags should be...
 236 AHIP_EndChannel         EQU AHI_TagBase+41      ; ... enclosed by these tags.
 237 AHIP_Freq               EQU AHI_TagBase+50
 238 AHIP_Vol                EQU AHI_TagBase+51
 239 AHIP_Pan                EQU AHI_TagBase+52
 240 AHIP_Sound              EQU AHI_TagBase+53
 241 AHIP_Offset             EQU AHI_TagBase+54
 242 AHIP_Length             EQU AHI_TagBase+55
 243 AHIP_LoopFreq           EQU AHI_TagBase+60
 244 AHIP_LoopVol            EQU AHI_TagBase+61
 245 AHIP_LoopPan            EQU AHI_TagBase+62
 246 AHIP_LoopSound          EQU AHI_TagBase+63
 247 AHIP_LoopOffset         EQU AHI_TagBase+64
 248 AHIP_LoopLength         EQU AHI_TagBase+65
 249
 250  ; AHI_ControlAudioA tags
 251 AHIC_Play               EQU AHI_TagBase+80      ; Boolean
 252 AHIC_Record             EQU AHI_TagBase+81      ; Boolean
 253 AHIC_MonitorVolume      EQU AHI_TagBase+82
 254 AHIC_MonitorVolume_Query EQU AHI_TagBase+83     ; ti_Data is pointer to Fixed (LONG)
 255 AHIC_MixFreq_Query      EQU AHI_TagBase+84      ; ti_Data is pointer to ULONG
 256 * --- New for V2, they will be ignored by V1 ---
 257 AHIC_InputGain          EQU AHI_TagBase+85
 258 AHIC_InputGain_Query    EQU AHI_TagBase+86      ; ti_Data is pointer to Fixed (LONG)
 259 AHIC_OutputVolume       EQU AHI_TagBase+87
 260 AHIC_OutputVolume_Query EQU AHI_TagBase+88      ; ti_Data is pointer to Fixed (LONG)
 261 AHIC_Input              EQU AHI_TagBase+89
 262 AHIC_Input_Query        EQU AHI_TagBase+90      ; ti_Data is pointer to ULONG
 263 AHIC_Output             EQU AHI_TagBase+91
 264 AHIC_Output_Query       EQU AHI_TagBase+92      ; ti_Data is pointer to ULONG
 265
 266  ; AHI_GetAudioAttrsA tags
 267 AHIDB_AudioID           EQU AHI_TagBase+100
 268 AHIDB_Driver            EQU AHI_TagBaseR+101    ; Pointer to name of driver
 269 AHIDB_Flags             EQU AHI_TagBase+102     ; Private!
 270 AHIDB_Volume            EQU AHI_TagBase+103     ; Boolean
 271 AHIDB_Panning           EQU AHI_TagBase+104     ; Boolean
 272 AHIDB_Stereo            EQU AHI_TagBase+105     ; Boolean
 273 AHIDB_HiFi              EQU AHI_TagBase+106     ; Boolean
 274 AHIDB_PingPong          EQU AHI_TagBase+107     ; Boolean
 275 AHIDB_MultTable         EQU AHI_TagBase+108     ; Private!
 276 AHIDB_Name              EQU AHI_TagBaseR+109    ; Pointer to name of this mode
 277 AHIDB_Bits              EQU AHI_TagBase+110     ; Output bits
 278 AHIDB_MaxChannels       EQU AHI_TagBase+111     ; Max supported channels
 279 AHIDB_MinMixFreq        EQU AHI_TagBase+112     ; Min mixing freq. supported
 280 AHIDB_MaxMixFreq        EQU AHI_TagBase+113     ; Max mixing freq. supported
 281 AHIDB_Record            EQU AHI_TagBase+114     ; Boolean
 282 AHIDB_Frequencies       EQU AHI_TagBase+115
 283 AHIDB_FrequencyArg      EQU AHI_TagBase+116     ; ti_Data is index number!
 284 AHIDB_Frequency         EQU AHI_TagBase+117
 285 AHIDB_Author            EQU AHI_TagBase+118     ; Pointer to driver author name
 286 AHIDB_Copyright         EQU AHI_TagBase+119     ; Pointer to driver copyright notice
 287 AHIDB_Version           EQU AHI_TagBase+120     ; Pointer to driver version string
 288 AHIDB_Annotation        EQU AHI_TagBase+121     ; Pointer to driver annotation text
 289 AHIDB_IndexArg          EQU AHI_TagBase+123     ; ti_Data is frequency!
 290 AHIDB_BufferLen         EQU AHI_TagBase+122     ; Specifies the string buffer size
 291 AHIDB_Index             EQU AHI_TagBase+124
 292 AHIDB_Realtime          EQU AHI_TagBase+125     ; Boolean
 293 AHIDB_MaxPlaySamples    EQU AHI_TagBase+126     ; It's sample *frames*
 294 AHIDB_MaxRecordSamples  EQU AHI_TagBase+127     ; It's sample *frames*
 295 AHIDB_MixFreq           EQU AHI_TagBase+128
 296 AHIDB_FullDuplex        EQU AHI_TagBase+129     ; Boolean
 297 * --- New for V2, they will be ignored by V1 ---
 298 AHIDB_MinMonitorVolume  EQU AHI_TagBase+130
 299 AHIDB_MaxMonitorVolume  EQU AHI_TagBase+131
 300 AHIDB_MinInputGain      EQU AHI_TagBase+132
 301 AHIDB_MaxInputGain      EQU AHI_TagBase+133
 302 AHIDB_MinOutputVolume   EQU AHI_TagBase+134
 303 AHIDB_MaxOutputVolume   EQU AHI_TagBase+135
 304 AHIDB_Inputs            EQU AHI_TagBase+136
 305 AHIDB_InputArg          EQU AHI_TagBase+137     * ti_Data is input index
 306 AHIDB_Input             EQU AHI_TagBase+138
 307 AHIDB_Outputs           EQU AHI_TagBase+139
 308 AHIDB_OutputArg         EQU AHI_TagBase+140     * ti_Data is input index
 309 AHIDB_Output            EQU AHI_TagBase+141
 310 * --- New for V4, they will be ignored by V2 and earlier ---
 311 AHIDB_Data              EQU AHI_TagBaseR+142    ; Private!
 312 AHIDB_DriverBaseName    EQU AHI_TagBaseR+143    ; Private!
 313 * --- New for V6, they will be ignored by V4 and earlier ---
 314 AHIDB_MultiChannel      EQU AHI_TagBase+144     ; Boolean
 315
 316  ; AHI_BestAudioIDA tags
 317 * --- New for V4, they will be ignored by V2 and earlier ---
 318 AHIB_Dizzy              EQU (AHI_TagBase+190)
 319
 320  ; AHI_AudioRequestA tags
 321    ; Window control
 322 AHIR_Window             EQU AHI_TagBase+200     ; Parent window
 323 AHIR_Screen             EQU AHI_TagBase+201     ; Screen to open on if no window
 324 AHIR_PubScreenName      EQU AHI_TagBase+202     ; Name of public screen
 325 AHIR_PrivateIDCMP       EQU AHI_TagBase+203     ; Allocate private IDCMP?
 326 AHIR_IntuiMsgFunc       EQU AHI_TagBase+204     ; Function to handle IntuiMessages
 327 AHIR_SleepWindow        EQU AHI_TagBase+205     ; Block input in AHIR_Window?
 328 AHIR_ObsoleteUserData   EQU AHI_TagBase+206     ; V4 UserData
 329 AHIR_UserData           EQU AHI_TagBase+207     ; What to put in ahiam_UserData (V6)
 330    ; Text display
 331 AHIR_TextAttr           EQU AHI_TagBase+220     ; Text font to use for gadget text
 332 AHIR_Locale             EQU AHI_TagBase+221     ; Locale to use for text
 333 AHIR_TitleText          EQU AHI_TagBase+222     ; Title of requester
 334 AHIR_PositiveText       EQU AHI_TagBase+223     ; Positive gadget text
 335 AHIR_NegativeText       EQU AHI_TagBase+224     ; Negative gadget text
 336    ; Initial settings
 337 AHIR_InitialLeftEdge    EQU AHI_TagBase+240     ; Initial requester coordinates
 338 AHIR_InitialTopEdge     EQU AHI_TagBase+241
 339 AHIR_InitialWidth       EQU AHI_TagBase+242     ; Initial requester dimensions
 340 AHIR_InitialHeight      EQU AHI_TagBase+243
 341 AHIR_InitialAudioID     EQU AHI_TagBase+244     ; Initial audio mode id
 342 AHIR_InitialMixFreq     EQU AHI_TagBase+245     ; Initial mixing/sampling frequency
 343 AHIR_InitialInfoOpened  EQU AHI_TagBase+246     ; Info window initially opened?
 344 AHIR_InitialInfoLeftEdge EQU AHI_TagBase+247    ; Initial Info window coords.
 345 AHIR_InitialInfoTopEdge EQU AHI_TagBase+248
 346 AHIR_InitialInfoWidth   EQU AHI_TagBase+249     ; Not used!
 347 AHIR_InitialInfoHeight  EQU AHI_TagBase+250     ; Not used!
 348    ; Options
 349 AHIR_DoMixFreq          EQU AHI_TagBase+260     ; Allow selection of mixing frequency?
 350 AHIR_DoDefaultMode      EQU AHI_TagBase+261     ; Allow selection of default mode? (V4)
 351    ; Filtering
 352 AHIR_FilterTags         EQU AHI_TagBase+270     ; Pointer to filter taglist
 353 AHIR_FilterFunc         EQU AHI_TagBase+271     ; Function to filter mode id's
 354
 355
 356 *** DEFS
 357
 358 AHI_INVALID_ID          EQU ~0                  ; Invalid Audio ID
 359 AHI_DEFAULT_ID          EQU $00000000           ; Only for AHI_AllocAudioA()!
 360 AHI_LOOPBACK_ID         EQU $00000001           ; Special sample render ID
 361 AHI_DEFAULT_FREQ        EQU 0                   ; Only for AHI_AllocAudioA()!
 362 AHI_MIXFREQ             EQU ~0                  ; Special frequency for AHI_SetFreq()
 363 AHI_NOSOUND             EQU ~0                  ; Turns a channel off
 364
 365  ; Set#? Flags
 366         BITDEF  AHIS,IMM,0                      ; Trigger action immediately
 367         BITDEF  AHIS,NODELAY,1                  ; Don't wait for zero-crossing
 368
 369 AHISF_NONE              EQU 0                   ; No flags (V6)
 370
 371
 372  ; Effect types
 373 AHIET_CANCEL            EQU 1<<31               ; OR with effect to disable
 374 AHIET_MASTERVOLUME      EQU 1
 375 AHIET_OUTPUTBUFFER      EQU 2
 376 * --- New for V4 ---
 377 AHIET_DSPMASK           EQU 3
 378 AHIET_DSPECHO           EQU 4
 379 AHIET_CHANNELINFO       EQU 5
 380
 381  ; Sound types
 382 AHIST_NOTYPE            EQU ~0                  ; Private
 383 AHIST_SAMPLE            EQU 0                   ; 8 or 16 bit sample
 384 AHIST_DYNAMICSAMPLE     EQU 1                   ; Dynamic sample
 385 AHIST_INPUT             EQU 1<<29               ; The input from your sampler
 386 AHIST_BW                EQU 1<<30               ; Private
 387
 388  ; Sample types
 389 ; Note that only AHIST_M8S, AHIST_S8S, AHIST_M16S and AHIST_S16S
 390 ; (plus AHIST_M32S, AHIST_S32S and AHIST_L7_1 in V6)
 391 ; are supported by AHI_LoadSound().
 392 AHIST_M8S               EQU 0                   ; Mono, 8 bit signed (BYTE)
 393 AHIST_M16S              EQU 1                   ; Mono, 16 bit signed (WORD)
 394 AHIST_S8S               EQU 2                   ; Stereo, 8 bit signed (2×BYTE)
 395 AHIST_S16S              EQU 3                   ; Stereo, 16 bit signed (2×WORD)
 396 AHIST_M32S              EQU 8                   ; Mono, 32 bit signed (LONG)
 397 AHIST_S32S              EQU 10                  ; Stereo, 32 bit signed (2×LONG)
 398
 399 AHIST_M8U               EQU 4                   ; OBSOLETE!
 400
 401 AHIST_L7_1              EQU $00c3000a           ; 7.1, 32 bit signed (8×LONG)
 402
 403  ; Error codes
 404 AHIE_OK                 EQU 0                   ; No error
 405 AHIE_NOMEM              EQU 1                   ; Out of memory
 406 AHIE_BADSOUNDTYPE       EQU 2                   ; Unknown sound type
 407 AHIE_BADSAMPLETYPE      EQU 3                   ; Unknown/unsupported sample type
 408 AHIE_ABORTED            EQU 4                   ; User-triggered abortion
 409 AHIE_UNKNOWN            EQU 5                   ; Error, but unknown
 410 AHIE_HALFDUPLEX         EQU 6                   ; CMD_WRITE/CMD_READ failure
 411
 412
 413
 414 *- DEVICE INTERFACE DEFINITIONS FOLLOWS ------------------------------------*
 415
 416  ; Device units
 417
 418 AHI_DEFAULT_UNIT        EQU 0
 419 AHI_NO_UNIT             EQU 255
 420
 421
 422  ; The preference file
 423
 424 ID_AHIU                 EQU "AHIU"
 425 ID_AHIG                 EQU "AHIG"
 426
 427         STRUCTURE AHIUnitPrefs,0
 428         UBYTE   ahiup_Unit
 429         UBYTE   ahiup_Obsolete                          ; Was ahiup_ScaleMode
 430         UWORD   ahiup_Channels
 431         ULONG   ahiup_AudioMode
 432         ULONG   ahiup_Frequency
 433         Fixed   ahiup_MonitorVolume
 434         Fixed   ahiup_InputGain
 435         Fixed   ahiup_OutputVolume
 436         ULONG   ahiup_Input
 437         ULONG   ahiup_Output
 438         LABEL   AHIUnitPrefs_SIZEOF
 439
 440
 441         STRUCTURE AHIGlobalPrefs,0
 442         UWORD   ahigp_DebugLevel                        ; Range: 0-3 (for None, Low,
 443                                                         ; High and All
 444         BOOL    ahigp_DisableSurround
 445         BOOL    ahigp_DisableEcho
 446         BOOL    ahigp_FastEcho
 447         Fixed   ahigp_MaxCPU
 448         BOOL    ahigp_ClipMasterVolume
 449         UWORD   ahigp_Pad;
 450         Fixed   ahigp_AntiClickTime;                    ; In seconds (V6)
 451         UWORD   ahigp_ScaleMode                         ; See below (V6)
 452         LABEL   AHIGlobalPrefs_SIZEOF
 453
 454  ; Debug levels
 455
 456 AHI_DEBUG_NONE          EQU (0)
 457 AHI_DEBUG_LOW           EQU (1)
 458 AHI_DEBUG_HIGH          EQU (2)
 459 AHI_DEBUG_ALL           EQU (3)
 460
 461  ; Scale modes
 462
 463 AHI_SCALE_FIXED_SAFE    EQU (0)                 ; x=y*1/max(ch)
 464 AHI_SCALE_DYNAMIC_SAFE  EQU (1)                 ; x=y*1/ch
 465 AHI_SCALE_FIXED_0_DB    EQU (2)                 ; x=y
 466 AHI_SCALE_FIXED_3_DB    EQU (3)                 ; x=y*1/sqrt(2)
 467 AHI_SCALE_FIXED_6_DB    EQU (4)                 ; x=y*1/2
 468
 469  ; AHIRequest
 470
 471         STRUCTURE AHIRequest,0
 472         STRUCT  ahir_Std,IOSTD_SIZE             ; Standard IO request
 473         UWORD   ahir_Version                    ; Needed version
 474 * --- New for V4, they will be ignored by V2 and earlier ---
 475         UWORD   ahir_Pad1
 476         ULONG   ahir_Private1                   ; Hands off!
 477         ULONG   ahir_Private2                   ; Hands off!
 478         ULONG   ahir_Type                       ; Sample format
 479         ULONG   ahir_Frequency                  ; Sample/Record frequency
 480         Fixed   ahir_Volume                     ; Sample volume
 481         Fixed   ahir_Position                   ; Stereo position
 482         APTR    ahir_Link                       ; For double buffering
 483         LABEL   AHIRequest_SIZEOF
 484
 485  ; Flags for OpenDevice()
 486
 487         BITDEF  AHID,NOMODESCAN,0
 488
 489         ENDC ; DEVICES_AHI_I