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1.1 ! root 1: /*++ ! 2: ! 3: Copyright (c) 1992 Media Vision, Inc ! 4: ! 5: Module Name: ! 6: ! 7: mvmix.c ! 8: ! 9: Abstract: ! 10: ! 11: This module contains code for controlling the Media Vision Mixer ! 12: hardware. Media Vision has used only two software-controllable ! 13: mixer chips so far. The MV 508 is used on the PAS 16 only. All ! 14: other chips use the National part XXXX. Programming the ! 15: Nationial mixer chip is VOODOO BLACK MAGIC and will be very slow ! 16: under NT. ! 17: ! 18: Environment: ! 19: ! 20: Kernel mode ! 21: ! 22: Revision History: ! 23: ! 24: 27-Sep-1992 ! 25: Initial revision ! 26: ! 27: --*/ ! 28: ! 29: #include <sound.h> ! 30: ! 31: void SetEq(PFOUNDINFO pFI, USHORT P_output, USHORT P_EQtype,USHORT P_level); ! 32: void SetEqMode(PFOUNDINFO pFI, USHORT P_loudness, USHORT P_enhance); ! 33: void NationalMix(PFOUNDINFO pFI, USHORT wData); ! 34: void NationalVolume(PFOUNDINFO pFI, USHORT wVolume,UCHAR wVolumeRegister); ! 35: ULONG Scale100ToFFFF(USHORT wVal); ! 36: BYTE ScaleFFFFTo100(USHORT wVal); ! 37: ! 38: #ifdef ALLOC_PRAGMA ! 39: #pragma alloc_text(init,SetOutput) ! 40: #pragma alloc_text(init,SetFilter) ! 41: #endif ! 42: ! 43: // ! 44: //-------------------------========================--------------------------- ! 45: //------------------------====< DATA SECTION >====--------------------------- ! 46: //-------------------------========================--------------------------- ! 47: // ! 48: // ! 49: // These variables are DMA/Buffer control variables ! 50: // ! 51: ! 52: // ! 53: // These variables mirror the hardware state ! 54: // ! 55: UCHAR audiomixr= SERIAL_MIX_CLOCK+SERIAL_MIX_DUALFM ; ! 56: UCHAR audiofilt; // B8A Audio Filter Control Register ! 57: ! 58: // ! 59: // a linear table of filter values - from mute to high ! 60: // ! 61: UCHAR FilterTable[]= ! 62: { ! 63: 0x00, // 000000b mute - goes to PC speaker ! 64: 0x24, // 100100b 20hz to 2.9khz ! 65: 0x39, // 111001b 20hz to 5.9khz ! 66: 0x31, // 110001b 20hz to 8.9khz ! 67: 0x29, // 101001b 20hz to 11.9khz ! 68: 0x22, // 100010b 20hz to 15.9khz ! 69: 0x21, // 100001b 20hz to 17.8khz ! 70: }; ! 71: // ! 72: //Mixer settings (0 - 12) ! 73: // ! 74: UCHAR mixersettings[]= ! 75: { ! 76: 0x00, // level 0 ! 77: 0x20, // level 1 ! 78: 0x10, // level 2 ! 79: 0x08, // level 3 ! 80: 0x04, // level 4 ! 81: 0x02, // level 5 ! 82: 0x12, // level 6 ! 83: 0x2A, // level 7 ! 84: 0x16, // level 8 ! 85: 0x01, // level 9 ! 86: 0x29, // level A ! 87: 0x1D, // level B ! 88: 0x2F // level C ! 89: }; ! 90: ! 91: UCHAR SampleFilterSetting=0; // default setting based on sample rate ! 92: ! 93: // ! 94: // Volume settings (0 - 12) ! 95: // ! 96: ! 97: UCHAR volsettings[]= ! 98: { ! 99: 0x00, // level 0 ! 100: 0x60, // level 1 ! 101: 0x50, // level 2 ! 102: 0x48, // level 3 ! 103: 0x44, // level 4 ! 104: 0x42, // level 5 ! 105: 0x52, // level 6 ! 106: 0x6A, // level 7 ! 107: 0x56, // level 8 ! 108: 0x41, // level 9 ! 109: 0x69, // level A ! 110: 0x5D, // level B ! 111: 0x6F // level C ! 112: }; ! 113: ! 114: // ! 115: // Xlat table lookup= 0-31 ! 116: // result= 0-12 ! 117: // ! 118: ! 119: UCHAR Scale32To12[]= ! 120: { ! 121: 0 , 1, 1, 2, 2, 3, 3, 3, // 0- 7 ! 122: 4 , 4, 4, 5, 5, 5, 6, 6, // 8-15 ! 123: 6 , 7, 7, 7, 8, 8, 8, 9, // 16-23 ! 124: 9 , 9,10,10,11,11,12,12 // 24-31 ! 125: }; ! 126: ! 127: ! 128: UCHAR Scale64To40[]= ! 129: { ! 130: 0 , 1, 2, 3, 4, 5, 6, 7, // 0- 7 ! 131: 8 , 8, 9,10,10,11,12,12, // 8-15 ! 132: 13,14,14,15,16,16,17,18, // 16-23 ! 133: 18,19,20,20,21,22,22,23, // 24-31 ! 134: 24,24,25,26,26,27,28,28, // 32-39 ! 135: 29,29,30,30,31,31,32,32, // 40-47 ! 136: 32,33,33,34,34,35,35,35, // 48-55 ! 137: 36,36,37,37,38,38,39,40 // 56-63 ! 138: }; ! 139: ! 140: UCHAR BassTreb32to13[]= ! 141: { ! 142: 0 , 1, 1, 2, 2, 3, 3, 3, // 0- 7 ! 143: 4 , 4, 4, 5, 5, 5, 6, 6, // 8-15 ! 144: 6 , 7, 7, 7, 8, 8, 8, 9, // 16-23 ! 145: 9 , 9,10,10,11,11,12,12 // 24-31 ! 146: }; ! 147: ! 148: ! 149: /*\ ! 150: ;---|*|-=< void SetInput (USHORT P_input_num, USHORT P_volume_lvl,USHORT P_channel, ! 151: ;---|*| USHORT P_crossover,USHORT P_output_num ) ! 152: ;---|*| ! 153: ;---|*| Set the selected channel within the Input Mixer ! 154: ;---|*| ! 155: ;---|*| Entry Conditions: ! 156: ;---|*| P_input_num = Input # (0-6 for serial mixer, 0-7 for 508) ! 157: ;---|*| P_volume_lvl = volume level (0-FFFF) ! 158: ;---|*| P_channel = LEFT, RIGHT or BOTH ! 159: ;---|*| P_crossover = Crossover Info (required onlby for 508) ! 160: ;---|*| P_output_num = Output # (0-1 for either mixer) ! 161: ;---|*| ! 162: ;---|*| Exit Conditions: ! 163: ;---|*| None ! 164: ;---|*| ! 165: ; \*/ ! 166: ! 167: void ! 168: SetInput (PFOUNDINFO pFI, UCHAR P_input_num, USHORT P_volume_lvl,USHORT P_channel, ! 169: USHORT P_crossover,UCHAR P_output_num ) ! 170: { ! 171: UCHAR bTemp,bTemp1; ! 172: ! 173: P_volume_lvl>>=(16-5); // convert 0-ffff to 0-31 ! 174: ! 175: if (pFI->Caps.CapsBits.Mixer_508) ! 176: { ! 177: bTemp=(UCHAR) P_input_num; // Channel # ! 178: ! 179: bTemp|=(P_channel<<5); // get left/right ! 180: bTemp|=MV_508_ADDRESS; // 508 ADDRESS BIT ! 181: bTemp|=MV_508_INPUT; // 508 INPUT BIT ! 182: ! 183: dprintf4(("Input Mixer 508 Address : %04x", bTemp)); ! 184: PASX_OUT(pFI, MIXER_508_REG, bTemp); ! 185: ! 186: bTemp=P_volume_lvl; // get volume level reduced to (0-31 range) ! 187: ! 188: bTemp1=P_crossover; // get CROSSOVER ! 189: ! 190: if (bTemp1==MIXCROSSCAPS_NORMAL_STEREO) ! 191: { ! 192: } ! 193: else ! 194: if (bTemp1 & MIXCROSSCAPS_REVERSE_STEREO) ! 195: { ! 196: bTemp |= MV_508_SWAP; // this channel's swapped ! 197: } ! 198: else ! 199: { ! 200: if (P_channel==_LEFT) ! 201: { ! 202: if (bTemp1 & MIXCROSSCAPS_LEFT_TO_RIGHT) ! 203: bTemp |= MV_508_SWAP; // this channel's swapped ! 204: } ! 205: else ! 206: { ! 207: if (bTemp1 & MIXCROSSCAPS_LEFT_TO_RIGHT) ! 208: bTemp |= MV_508_SWAP; // this channel's swapped ! 209: } ! 210: } ! 211: ! 212: bTemp|=((P_output_num & 1 )<<5); // select output number ! 213: dprintf4(("Input Mixer 508 Data : %04x", bTemp)); ! 214: PASX_OUT(pFI, MIXER_508_REG,bTemp); ! 215: ! 216: } ! 217: else // National (serially programmed) mixer ! 218: { ! 219: dprintf2(("-----------Using Serial Mixer!")); ! 220: // ! 221: // send out the mixer channel # ! 222: // ! 223: ! 224: bTemp=P_input_num; // Channel # ! 225: bTemp++; // channel 0 was XXX ! 226: ! 227: if (P_channel==_RIGHT) ! 228: bTemp+=7; // this magic number is the offset to right channel ! 229: ! 230: bTemp|=NATIONAL_COMMAND; ! 231: NationalMix(pFI, bTemp); ! 232: ! 233: // select the correct mixer ! 234: bTemp1=P_output_num<<6; // get output number ! 235: ! 236: // ! 237: // send out the mixer data ! 238: // ! 239: ! 240: bTemp=P_volume_lvl &= 0x1F; // limit to 31 ! 241: bTemp=Scale32To12[bTemp]; ! 242: bTemp=mixersettings[bTemp]; ! 243: ! 244: NationalMix(pFI, bTemp); ! 245: } ! 246: } ! 247: ! 248: /*\ ! 249: ;---|*|--------====< void SetOutput (line, level, channel ) >====-------- ! 250: ;---|*| ! 251: ;---|*| This routine outputs a new setting for a volume channel. ! 252: ;---|*| ! 253: ;---|*| Entry Conditions: ! 254: ;---|*| WParm1 is a value from 0 - 1 ! 255: ;---|*| WParm2 is a value to be written to the control (0-63) ! 256: ;---|*| WParm3 signifies left or right ! 257: ;---|*| ! 258: ;---|*| Exit Conditions: ! 259: ;---|*| None ! 260: ;---|*| ! 261: ; \*/ ! 262: void ! 263: SetOutput (PFOUNDINFO pFI, UCHAR P_output_num,USHORT P_volume_lvl,USHORT P_channel ) ! 264: { ! 265: UCHAR bTemp,bTemp1; ! 266: ! 267: dprintf2(("SetOutput Entered")); ! 268: P_volume_lvl>>=(16-6); // convert 0-ffff to 0-63 ! 269: ! 270: if (pFI->Caps.CapsBits.Mixer_508) ! 271: { ! 272: //EnterCrit /// don't interrupt me! ! 273: ! 274: // investigate keSynchronizeExecution ! 275: ! 276: bTemp=(UCHAR) P_output_num; ! 277: bTemp++; // Output number need to be 1 based ! 278: ! 279: bTemp|=(P_channel<<5); // get left/right ! 280: bTemp|=MV_508_ADDRESS; ! 281: ! 282: dprintf4(("Output Mixer 508 Address : %04x", bTemp)); ! 283: PASX_OUT(pFI, MIXER_508_REG,bTemp); ! 284: ! 285: #if 0 ! 286: if (fMuting) ! 287: { ! 288: bTemp=0; ! 289: } ! 290: else ! 291: #endif ! 292: { ! 293: bTemp=P_volume_lvl; // get volume level (0-63 range) ! 294: ! 295: if (P_output_num!=OUT_AMPLIFIER) ! 296: bTemp>>=2; // output B of MV508 has 0-15 range ! 297: } ! 298: dprintf4((" Mixer 508 Data : %04x", bTemp)); ! 299: PASX_OUT(pFI, MIXER_508_REG,bTemp); ! 300: } ! 301: else // NATIONAL (SERIAL PROGRAMMED) MIXER ! 302: { ! 303: dprintf2(("Using Serial Mixer!")); ! 304: if (P_output_num==0) // serial device has volume on output 0 only ! 305: { ! 306: #if 0 ! 307: if (fMuting) ! 308: { ! 309: bTemp=0; ! 310: } ! 311: else ! 312: #endif ! 313: { ! 314: bTemp=Scale64To40[P_volume_lvl]; ! 315: } ! 316: NationalVolume(pFI, (USHORT)bTemp,(UCHAR)((P_channel&1)+NATIONAL_LEFT_VOL_REG)); // see Pas-1 spec p.15 (LEFT VOLUME CONTROL) ! 317: } ! 318: } ! 319: ! 320: } ! 321: ! 322: /*\ ! 323: ;---|*|--------====< void SetEQ (line, EQ, level ) >====-------- ! 324: ;---|*| ! 325: ;---|*| This routine outputs a new setting for a volume channel. ! 326: ;---|*| ! 327: ;---|*| Entry Conditions: ! 328: ;---|*| WParm1 is line number (range 0 - 1; 1 is don't care) ! 329: ;---|*| WParm2 is EQ type (ie. Loudness, Stereo Enhance, BMT) ! 330: ;---|*| WParm3 is level (range 0-31) ! 331: ;---|*| ! 332: ;---|*| Exit Conditions: ! 333: ;---|*| None ! 334: ;---|*| ! 335: ; \*/ ! 336: ! 337: void ! 338: SetEq(PFOUNDINFO pFI, USHORT P_output, USHORT P_EQtype,USHORT P_level) ! 339: { ! 340: UCHAR bTemp; ! 341: ! 342: if (P_output!=0) ! 343: return; ! 344: ! 345: if (pFI->Caps.CapsBits.Mixer_508) ! 346: { ! 347: switch (P_EQtype) ! 348: { ! 349: case _BASS: ! 350: PASX_OUT(pFI, MIXER_508_REG,MV_508_ADDRESS + MV_508_BASS); ! 351: PASX_OUT(pFI, MIXER_508_REG, BassTreb32to13[P_level]); ! 352: break; ! 353: ! 354: case _TREBLE: ! 355: PASX_OUT(pFI, MIXER_508_REG,MV_508_ADDRESS + MV_508_TREBLE); ! 356: PASX_OUT(pFI, MIXER_508_REG, BassTreb32to13[P_level]); ! 357: break; ! 358: } ! 359: } ! 360: else // NATIONAL (SERIAL PROGRAMMED) MIXER ! 361: { ! 362: bTemp=Scale32To12[P_level]; ! 363: NationalVolume(pFI, (USHORT)bTemp,(UCHAR)((P_EQtype&1)+NATIONAL_BASS_REG) ); // see Pas-1 spec p.15 (LEFT VOLUME CONTROL) ! 364: } ! 365: } ! 366: ! 367: ! 368: /*\ ! 369: ;---|*|--------====< void SetEqMode (Loudness, Enhance ) >====-------- ! 370: ;---|*| ! 371: ;---|*| This routine sets loundess and stereo enhance modes ! 372: ;---|*| ! 373: ;---|*| Entry Conditions: ! 374: ;---|*| loudness (Z vs NZ) ! 375: ;---|*| Stereo Enhance (range 0-3) ! 376: ;---|*| ! 377: ;---|*| Exit Conditions: ! 378: ;---|*| None ! 379: ;---|*| ! 380: ; \*/ ! 381: ! 382: void ! 383: SetEqMode(PFOUNDINFO pFI, USHORT P_loudness, USHORT P_enhance) ! 384: { ! 385: UCHAR bTemp=0; ! 386: ! 387: if (pFI->Caps.CapsBits.Mixer_508) ! 388: { ! 389: PASX_OUT(pFI, MIXER_508_REG,MV_508_ADDRESS + MV_508_EQMODE); ! 390: if (P_loudness) ! 391: bTemp+=MV_508_LOUDNESS; ! 392: ! 393: bTemp+=P_enhance & MV_508_ENHANCE; ! 394: PASX_OUT(pFI, MIXER_508_REG,bTemp); ! 395: } ! 396: else ! 397: { ! 398: if (P_loudness) ! 399: bTemp=NATIONAL_LOUDNESS; // Loudness bit ! 400: ! 401: if (P_enhance) ! 402: bTemp|=NATIONAL_ENHANCE; // stereo enhance bit ! 403: ! 404: NationalVolume(pFI, bTemp,NATIONAL_LOUD_ENH_REG); // see Pas-1 spec p.15 (LEFT VOLUME CONTROL) ! 405: } ! 406: } ! 407: ! 408: /* ----------------------====< NationalMix >====-------------------------- */ ! 409: /*\ | ! 410: ;---|*| NationalMix -- Load The National Mixer | ! 411: ;---|*| | ! 412: ;---|*| Entry Conditions | ! 413: ;---|*| wData = index/data | ! 414: ;---|*| | ! 415: ; \*/ ! 416: void ! 417: NationalMix(PFOUNDINFO pFI, USHORT wData) ! 418: { ! 419: USHORT i,bTemp=0; ! 420: ! 421: // EnterCrit ! 422: ! 423: bTemp = audiomixr; // get current hardware state ! 424: // bTemp &= SERIAL_MIX_REALSOUND+SERIAL_MIX_DUALFM; // save state of only these bits ! 425: bTemp|=~(SERIAL_MIX_REALSOUND+SERIAL_MIX_DUALFM); // turn on all other bits ! 426: // all clocks and strobes should be 1 ! 427: PASX_OUT(pFI, SERIAL_MIXER,bTemp); ! 428: KeStallExecutionProcessor(5); // wait 5 us ! 429: ! 430: for (i=0; i<8; i++) { ! 431: ! 432: // output clock is 0 ! 433: PASX_OUT(pFI, SERIAL_MIXER,bTemp & (~SERIAL_MIX_CLOCK)); ! 434: KeStallExecutionProcessor(5); // wait 5 us ! 435: ! 436: PASX_OUT(pFI, SERIAL_MIXER,(wData>>i)& 1); //send data, clock is 0 ! 437: KeStallExecutionProcessor(5); // wait 5 us ! 438: ! 439: PASX_OUT(pFI, SERIAL_MIXER, ! 440: ((wData>>i)& 1)^SERIAL_MIX_CLOCK); //send data, clock is 1 ! 441: KeStallExecutionProcessor(5); // wait 5 us ! 442: } ! 443: ! 444: PASX_OUT(pFI, SERIAL_MIXER, ! 445: ((wData>>i)& 1)|SERIAL_MIX_CLOCK|SERIAL_MIX_STROBE); //strobe it in ! 446: KeStallExecutionProcessor(5); // wait 5 us ! 447: ! 448: PASX_OUT(pFI, SERIAL_MIXER,bTemp); ! 449: audiomixr=bTemp; // save the last state ! 450: KeStallExecutionProcessor(5); // wait 5 us ! 451: ! 452: } ! 453: /* ---;--------------------====< NationalVolume >====------------------------------- */ ! 454: /*\; ! 455: ;---|*|; NationalVolume -- Load Volume control Register ! 456: ;---|*|; ! 457: ;---|*|; Entry Conditions: ! 458: ;---|*|; bl = parameter register (volume control channel 0-7) ! 459: ;---|*|; ah = data to transfer (new channel setting) ! 460: ; \*/ ! 461: ! 462: void ! 463: NationalVolume(PFOUNDINFO pFI, USHORT wVolume, UCHAR wLeftRight) ! 464: { ! 465: // ! 466: // pass everything, but left/right volume directly to the device ! 467: // ! 468: // left & right volume are presented ! 469: // to the logical level as 0 - 40, ! 470: // where 0 is the lowest, and 40 is ! 471: // the highest. In reality, this ! 472: // is backwards, that is, 40 is the ! 473: // lowest, and 0 is the highest. We will ! 474: // correct the value here... ! 475: ! 476: USHORT bTemp,i; ! 477: short sVolume=wVolume; ! 478: ! 479: // Perform the volume control output ! 480: ! 481: if (( wLeftRight==NATIONAL_LEFT_VOL_REG) || ! 482: (wLeftRight==NATIONAL_RIGHT_VOL_REG )) ! 483: { ! 484: sVolume -=0x40; // is backwards, that is, 40 is the ! 485: sVolume = -sVolume; // lowest, and 0 is the highest. We will ! 486: // correct the value here... ! 487: } ! 488: // ! 489: // all 1s but volume enable and clock ! 490: // ! 491: bTemp=audiomixr; // save the realsound & dual fm bits ! 492: bTemp &= SERIAL_MIX_REALSOUND+SERIAL_MIX_DUALFM; ! 493: bTemp |= ~ (SERIAL_MIX_REALSOUND+SERIAL_MIX_DUALFM+SERIAL_MIX_MASTER+SERIAL_MIX_CLOCK); ! 494: ! 495: // EnterCrit ! 496: PASX_OUT(pFI, SERIAL_MIXER,bTemp); // note: clock is off ! 497: ! 498: for (i=0; i<8; i++) { ! 499: ! 500: bTemp=(wLeftRight>>i)& 1; ! 501: PASX_OUT(pFI, SERIAL_MIXER,(bTemp | SERIAL_MIX_CLOCK)); // clock's on ! 502: KeStallExecutionProcessor(5); // wait 5 us ! 503: ! 504: PASX_OUT(pFI, SERIAL_MIXER,(bTemp)); // clock's off ! 505: KeStallExecutionProcessor(5); // wait 5 us ! 506: } ! 507: ! 508: // write with volume control enable ! 509: // which starts data loading ! 510: PASX_OUT(pFI, SERIAL_MIXER,bTemp|SERIAL_MIX_MASTER); ! 511: KeStallExecutionProcessor(6); // wait 6 us ! 512: ! 513: for (i=0; i<8; i++) { ! 514: ! 515: bTemp=bTemp & (~D0); // mask off D0 ! 516: bTemp |= ((sVolume>>i) & D0); // move current bit into D0 ! 517: ! 518: PASX_OUT(pFI, SERIAL_MIXER,bTemp+SERIAL_MIX_CLOCK); ! 519: KeStallExecutionProcessor(6); // wait 6 us ! 520: ! 521: PASX_OUT(pFI, SERIAL_MIXER,bTemp); ! 522: KeStallExecutionProcessor(6); // wait 5 us ! 523: } ! 524: ! 525: for (i=0; i<12; i++) { ! 526: ! 527: PASX_OUT(pFI, SERIAL_MIXER,bTemp); ! 528: KeStallExecutionProcessor(6); // wait 6 us ! 529: } ! 530: ! 531: // toggle volume control enable ! 532: ! 533: PASX_OUT(pFI, SERIAL_MIXER,bTemp|SERIAL_MIX_MASTER); ! 534: KeStallExecutionProcessor(6); // wait 6 us ! 535: ! 536: PASX_OUT(pFI, SERIAL_MIXER,bTemp|SERIAL_MIX_MASTER); ! 537: KeStallExecutionProcessor(6); // wait 6 us ! 538: ! 539: PASX_OUT(pFI, SERIAL_MIXER,bTemp|SERIAL_MIX_MASTER); ! 540: KeStallExecutionProcessor(6); // wait 6 us ! 541: ! 542: PASX_OUT(pFI, SERIAL_MIXER,bTemp); ! 543: KeStallExecutionProcessor(6); // wait 6 us ! 544: ! 545: audiomixr=bTemp; // save the last state ! 546: } ! 547: ! 548: /*\ ! 549: ;---|*|--------------====< void SetFilter (int setting ) >===--------------- ! 550: ;---|*| ! 551: ;---|*| This routine selects a filter setting from mute to high freq filter. ! 552: ;---|*| ! 553: ;---|*| Entry Conditions: ! 554: ;---|*| WParm1 is a value from 0 - 6 ! 555: ;---|*| ! 556: ;---|*| Exit Conditions: ! 557: ;---|*| None ! 558: ;---|*| ! 559: ;---|*| ! 560: ; \*/ ! 561: ! 562: void ! 563: SetFilter(PFOUNDINFO pFI, USHORT wSetting) ! 564: { ! 565: USHORT wTemp; ! 566: ! 567: if (wSetting <= FILTERMAX) { ! 568: ! 569: wSetting=FilterTable[wSetting]; ! 570: ! 571: wTemp = audiofilt; // get current bits ! 572: wTemp &= ~(fFIdatabits+fFImutebits); // save everthing but ! 573: ! 574: wSetting|=wTemp; ! 575: ! 576: // EnterCrit ! 577: PASX_OUT(pFI, FILTER_REGISTER, wSetting); ! 578: KeStallExecutionProcessor(6); // wait 6 us ! 579: ! 580: audiofilt=wSetting; // set current bits ! 581: } ! 582: ! 583: } ! 584: #if 0 ! 585: ULONG ! 586: Scale100ToFFFF(WORD wVal) ! 587: { ! 588: ULONG dwScaled; ! 589: ! 590: dwScaled=((ULONG)wVal) * (0xFFFFL/100L); ! 591: dwScaled=(dwScaled & 0xff00L)+ (dwScaled >>8); ! 592: ! 593: return(dwScaled); ! 594: } ! 595: ! 596: UCHAR ! 597: ScaleFFFFTo100(WORD wVal) ! 598: { ! 599: UCHAR bScaled; ! 600: ! 601: bScaled=((wVal>>8)*100)/255; ! 602: ! 603: return(bScaled); ! 604: } ! 605: #endif ! 606:
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