+++ /dev/null
-//\r
-// ID Engine\r
-// ID_SD.c - Sound Manager for Wolfenstein 3D\r
-// v1.2\r
-// By Jason Blochowiak\r
-//\r
-\r
-//\r
-// This module handles dealing with generating sound on the appropriate\r
-// hardware\r
-//\r
-// Depends on: User Mgr (for parm checking)\r
-//\r
-// Globals:\r
-// For User Mgr:\r
-// SoundSourcePresent - Sound Source thingie present?\r
-// SoundBlasterPresent - SoundBlaster card present?\r
-// AdLibPresent - AdLib card present?\r
-// SoundMode - What device is used for sound effects\r
-// (Use SM_SetSoundMode() to set)\r
-// MusicMode - What device is used for music\r
-// (Use SM_SetMusicMode() to set)\r
-// DigiMode - What device is used for digitized sound effects\r
-// (Use SM_SetDigiDevice() to set)\r
-//\r
-// For Cache Mgr:\r
-// NeedsDigitized - load digitized sounds?\r
-// NeedsMusic - load music?\r
-//\r
-\r
-#pragma hdrstop // Wierdo thing with MUSE\r
-\r
-#include <dos.h>\r
-\r
-#ifdef _MUSE_ // Will be defined in ID_Types.h\r
-#include "ID_SD.h"\r
-#else\r
-#include "ID_HEADS.H"\r
-#endif\r
-#pragma hdrstop\r
-#pragma warn -pia\r
-\r
-#ifdef nil\r
-#undef nil\r
-#endif\r
-#define nil 0\r
-\r
-#define SDL_SoundFinished() {SoundNumber = SoundPriority = 0;}\r
-\r
-// Macros for SoundBlaster stuff\r
-#define sbOut(n,b) outportb((n) + sbLocation,b)\r
-#define sbIn(n) inportb((n) + sbLocation)\r
-#define sbWriteDelay() while (sbIn(sbWriteStat) & 0x80);\r
-#define sbReadDelay() while (sbIn(sbDataAvail) & 0x80);\r
-\r
-// Macros for AdLib stuff\r
-#define selreg(n) outportb(alFMAddr,n)\r
-#define writereg(n) outportb(alFMData,n)\r
-#define readstat() inportb(alFMStatus)\r
-\r
-// Imports from ID_SD_A.ASM\r
-extern void SDL_SetDS(void),\r
- SDL_IndicatePC(boolean on);\r
-extern void interrupt SDL_t0ExtremeAsmService(void),\r
- SDL_t0FastAsmService(void),\r
- SDL_t0SlowAsmService(void);\r
-\r
-// Global variables\r
- boolean SoundSourcePresent,\r
- AdLibPresent,\r
- SoundBlasterPresent,SBProPresent,\r
- NeedsDigitized,NeedsMusic,\r
- SoundPositioned;\r
- SDMode SoundMode;\r
- SMMode MusicMode;\r
- SDSMode DigiMode;\r
- longword TimeCount;\r
- word HackCount;\r
- word *SoundTable; // Really * _seg *SoundTable, but that don't work\r
- boolean ssIsTandy;\r
- word ssPort = 2;\r
- int DigiMap[LASTSOUND];\r
-\r
-// Internal variables\r
-static boolean SD_Started;\r
- boolean nextsoundpos;\r
- longword TimerDivisor,TimerCount;\r
-static char *ParmStrings[] =\r
- {\r
- "noal",\r
- "nosb",\r
- "nopro",\r
- "noss",\r
- "sst",\r
- "ss1",\r
- "ss2",\r
- "ss3",\r
- nil\r
- };\r
-static void (*SoundUserHook)(void);\r
- soundnames SoundNumber,DigiNumber;\r
- word SoundPriority,DigiPriority;\r
- int LeftPosition,RightPosition;\r
- void interrupt (*t0OldService)(void);\r
- long LocalTime;\r
- word TimerRate;\r
-\r
- word NumDigi,DigiLeft,DigiPage;\r
- word _seg *DigiList;\r
- word DigiLastStart,DigiLastEnd;\r
- boolean DigiPlaying;\r
-static boolean DigiMissed,DigiLastSegment;\r
-static memptr DigiNextAddr;\r
-static word DigiNextLen;\r
-\r
-// SoundBlaster variables\r
-static boolean sbNoCheck,sbNoProCheck;\r
-static volatile boolean sbSamplePlaying;\r
-static byte sbOldIntMask = -1;\r
-static volatile byte huge *sbNextSegPtr;\r
-static byte sbDMA = 1,\r
- sbDMAa1 = 0x83,sbDMAa2 = 2,sbDMAa3 = 3,\r
- sba1Vals[] = {0x87,0x83,0,0x82},\r
- sba2Vals[] = {0,2,0,6},\r
- sba3Vals[] = {1,3,0,7};\r
-static int sbLocation = -1,sbInterrupt = 7,sbIntVec = 0xf,\r
- sbIntVectors[] = {-1,-1,0xa,0xb,-1,0xd,-1,0xf,-1,-1,-1};\r
-static volatile longword sbNextSegLen;\r
-static volatile SampledSound huge *sbSamples;\r
-static void interrupt (*sbOldIntHand)(void);\r
-static byte sbpOldFMMix,sbpOldVOCMix;\r
-\r
-// SoundSource variables\r
- boolean ssNoCheck;\r
- boolean ssActive;\r
- word ssControl,ssStatus,ssData;\r
- byte ssOn,ssOff;\r
- volatile byte far *ssSample;\r
- volatile longword ssLengthLeft;\r
-\r
-// PC Sound variables\r
- volatile byte pcLastSample,far *pcSound;\r
- longword pcLengthLeft;\r
- word pcSoundLookup[255];\r
-\r
-// AdLib variables\r
- boolean alNoCheck;\r
- byte far *alSound;\r
- word alBlock;\r
- longword alLengthLeft;\r
- longword alTimeCount;\r
- Instrument alZeroInst;\r
-\r
-// This table maps channel numbers to carrier and modulator op cells\r
-static byte carriers[9] = { 3, 4, 5,11,12,13,19,20,21},\r
- modifiers[9] = { 0, 1, 2, 8, 9,10,16,17,18},\r
-// This table maps percussive voice numbers to op cells\r
- pcarriers[5] = {19,0xff,0xff,0xff,0xff},\r
- pmodifiers[5] = {16,17,18,20,21};\r
-\r
-// Sequencer variables\r
- boolean sqActive;\r
-static word alFXReg;\r
-static ActiveTrack *tracks[sqMaxTracks],\r
- mytracks[sqMaxTracks];\r
-static word sqMode,sqFadeStep;\r
- word far *sqHack,far *sqHackPtr,sqHackLen,sqHackSeqLen;\r
- long sqHackTime;\r
-\r
-// Internal routines\r
- void SDL_DigitizedDone(void);\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_SetTimer0() - Sets system timer 0 to the specified speed\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-#pragma argsused\r
-static void\r
-SDL_SetTimer0(word speed)\r
-{\r
-#ifndef TPROF // If using Borland's profiling, don't screw with the timer\r
-asm pushf\r
-asm cli\r
-\r
- outportb(0x43,0x36); // Change timer 0\r
- outportb(0x40,speed);\r
- outportb(0x40,speed >> 8);\r
- // Kludge to handle special case for digitized PC sounds\r
- if (TimerDivisor == (1192030 / (TickBase * 100)))\r
- TimerDivisor = (1192030 / (TickBase * 10));\r
- else\r
- TimerDivisor = speed;\r
-\r
-asm popf\r
-#else\r
- TimerDivisor = 0x10000;\r
-#endif\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_SetIntsPerSec() - Uses SDL_SetTimer0() to set the number of\r
-// interrupts generated by system timer 0 per second\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_SetIntsPerSec(word ints)\r
-{\r
- TimerRate = ints;\r
- SDL_SetTimer0(1192030 / ints);\r
-}\r
-\r
-static void\r
-SDL_SetTimerSpeed(void)\r
-{\r
- word rate;\r
- void interrupt (*isr)(void);\r
-\r
- if ((DigiMode == sds_PC) && DigiPlaying)\r
- {\r
- rate = TickBase * 100;\r
- isr = SDL_t0ExtremeAsmService;\r
- }\r
- else if\r
- (\r
- (MusicMode == smm_AdLib)\r
- || ((DigiMode == sds_SoundSource) && DigiPlaying)\r
- )\r
- {\r
- rate = TickBase * 10;\r
- isr = SDL_t0FastAsmService;\r
- }\r
- else\r
- {\r
- rate = TickBase * 2;\r
- isr = SDL_t0SlowAsmService;\r
- }\r
-\r
- if (rate != TimerRate)\r
- {\r
- setvect(8,isr);\r
- SDL_SetIntsPerSec(rate);\r
- TimerRate = rate;\r
- }\r
-}\r
-\r
-//\r
-// SoundBlaster code\r
-//\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_SBStopSample() - Stops any active sampled sound and causes DMA\r
-// requests from the SoundBlaster to cease\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-#ifdef _MUSE_\r
-void\r
-#else\r
-static void\r
-#endif\r
-SDL_SBStopSample(void)\r
-{\r
- byte is;\r
-\r
-asm pushf\r
-asm cli\r
-\r
- if (sbSamplePlaying)\r
- {\r
- sbSamplePlaying = false;\r
-\r
- sbWriteDelay();\r
- sbOut(sbWriteCmd,0xd0); // Turn off DSP DMA\r
-\r
- is = inportb(0x21); // Restore interrupt mask bit\r
- if (sbOldIntMask & (1 << sbInterrupt))\r
- is |= (1 << sbInterrupt);\r
- else\r
- is &= ~(1 << sbInterrupt);\r
- outportb(0x21,is);\r
- }\r
-\r
-asm popf\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_SBPlaySeg() - Plays a chunk of sampled sound on the SoundBlaster\r
-// Insures that the chunk doesn't cross a bank boundary, programs the DMA\r
-// controller, and tells the SB to start doing DMA requests for DAC\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static longword\r
-SDL_SBPlaySeg(volatile byte huge *data,longword length)\r
-{\r
- unsigned datapage;\r
- longword dataofs,uselen;\r
-\r
- uselen = length;\r
- datapage = FP_SEG(data) >> 12;\r
- dataofs = ((FP_SEG(data) & 0xfff) << 4) + FP_OFF(data);\r
- if (dataofs >= 0x10000)\r
- {\r
- datapage++;\r
- dataofs -= 0x10000;\r
- }\r
-\r
- if (dataofs + uselen > 0x10000)\r
- uselen = 0x10000 - dataofs;\r
-\r
- uselen--;\r
-\r
- // Program the DMA controller\r
-asm pushf\r
-asm cli\r
- outportb(0x0a,sbDMA | 4); // Mask off DMA on channel sbDMA\r
- outportb(0x0c,0); // Clear byte ptr flip-flop to lower byte\r
- outportb(0x0b,0x49); // Set transfer mode for D/A conv\r
- outportb(sbDMAa2,(byte)dataofs); // Give LSB of address\r
- outportb(sbDMAa2,(byte)(dataofs >> 8)); // Give MSB of address\r
- outportb(sbDMAa1,(byte)datapage); // Give page of address\r
- outportb(sbDMAa3,(byte)uselen); // Give LSB of length\r
- outportb(sbDMAa3,(byte)(uselen >> 8)); // Give MSB of length\r
- outportb(0x0a,sbDMA); // Re-enable DMA on channel sbDMA\r
-\r
- // Start playing the thing\r
- sbWriteDelay();\r
- sbOut(sbWriteCmd,0x14);\r
- sbWriteDelay();\r
- sbOut(sbWriteData,(byte)uselen);\r
- sbWriteDelay();\r
- sbOut(sbWriteData,(byte)(uselen >> 8));\r
-asm popf\r
-\r
- return(uselen + 1);\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_SBService() - Services the SoundBlaster DMA interrupt\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void interrupt\r
-SDL_SBService(void)\r
-{\r
- longword used;\r
-\r
- sbIn(sbDataAvail); // Ack interrupt to SB\r
-\r
- if (sbNextSegPtr)\r
- {\r
- used = SDL_SBPlaySeg(sbNextSegPtr,sbNextSegLen);\r
- if (sbNextSegLen <= used)\r
- sbNextSegPtr = nil;\r
- else\r
- {\r
- sbNextSegPtr += used;\r
- sbNextSegLen -= used;\r
- }\r
- }\r
- else\r
- {\r
- SDL_SBStopSample();\r
- SDL_DigitizedDone();\r
- }\r
-\r
- outportb(0x20,0x20); // Ack interrupt\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_SBPlaySample() - Plays a sampled sound on the SoundBlaster. Sets up\r
-// DMA to play the sound\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-#ifdef _MUSE_\r
-void\r
-#else\r
-static void\r
-#endif\r
-SDL_SBPlaySample(byte huge *data,longword len)\r
-{\r
- longword used;\r
-\r
- SDL_SBStopSample();\r
-\r
-asm pushf\r
-asm cli\r
-\r
- used = SDL_SBPlaySeg(data,len);\r
- if (len <= used)\r
- sbNextSegPtr = nil;\r
- else\r
- {\r
- sbNextSegPtr = data + used;\r
- sbNextSegLen = len - used;\r
- }\r
-\r
- // Save old interrupt status and unmask ours\r
- sbOldIntMask = inportb(0x21);\r
- outportb(0x21,sbOldIntMask & ~(1 << sbInterrupt));\r
-\r
- sbWriteDelay();\r
- sbOut(sbWriteCmd,0xd4); // Make sure DSP DMA is enabled\r
-\r
- sbSamplePlaying = true;\r
-\r
-asm popf\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_PositionSBP() - Sets the attenuation levels for the left and right\r
-// channels by using the mixer chip on the SB Pro. This hits a hole in\r
-// the address map for normal SBs.\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_PositionSBP(int leftpos,int rightpos)\r
-{\r
- byte v;\r
-\r
- if (!SBProPresent)\r
- return;\r
-\r
- leftpos = 15 - leftpos;\r
- rightpos = 15 - rightpos;\r
- v = ((leftpos & 0x0f) << 4) | (rightpos & 0x0f);\r
-\r
-asm pushf\r
-asm cli\r
-\r
- sbOut(sbpMixerAddr,sbpmVoiceVol);\r
- sbOut(sbpMixerData,v);\r
-\r
-asm popf\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_CheckSB() - Checks to see if a SoundBlaster resides at a\r
-// particular I/O location\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static boolean\r
-SDL_CheckSB(int port)\r
-{\r
- int i;\r
-\r
- sbLocation = port << 4; // Initialize stuff for later use\r
-\r
- sbOut(sbReset,true); // Reset the SoundBlaster DSP\r
-asm mov dx,0x388 // Wait >4usec\r
-asm in al, dx\r
-asm in al, dx\r
-asm in al, dx\r
-asm in al, dx\r
-asm in al, dx\r
-asm in al, dx\r
-asm in al, dx\r
-asm in al, dx\r
-asm in al, dx\r
-\r
- sbOut(sbReset,false); // Turn off sb DSP reset\r
-asm mov dx,0x388 // Wait >100usec\r
-asm mov cx,100\r
-usecloop:\r
-asm in al,dx\r
-asm loop usecloop\r
-\r
- for (i = 0;i < 100;i++)\r
- {\r
- if (sbIn(sbDataAvail) & 0x80) // If data is available...\r
- {\r
- if (sbIn(sbReadData) == 0xaa) // If it matches correct value\r
- return(true);\r
- else\r
- {\r
- sbLocation = -1; // Otherwise not a SoundBlaster\r
- return(false);\r
- }\r
- }\r
- }\r
- sbLocation = -1; // Retry count exceeded - fail\r
- return(false);\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// Checks to see if a SoundBlaster is in the system. If the port passed is\r
-// -1, then it scans through all possible I/O locations. If the port\r
-// passed is 0, then it uses the default (2). If the port is >0, then\r
-// it just passes it directly to SDL_CheckSB()\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static boolean\r
-SDL_DetectSoundBlaster(int port)\r
-{\r
- int i;\r
-\r
- if (port == 0) // If user specifies default, use 2\r
- port = 2;\r
- if (port == -1)\r
- {\r
- if (SDL_CheckSB(2)) // Check default before scanning\r
- return(true);\r
-\r
- if (SDL_CheckSB(4)) // Check other SB Pro location before scan\r
- return(true);\r
-\r
- for (i = 1;i <= 6;i++) // Scan through possible SB locations\r
- {\r
- if ((i == 2) || (i == 4))\r
- continue;\r
-\r
- if (SDL_CheckSB(i)) // If found at this address,\r
- return(true); // return success\r
- }\r
- return(false); // All addresses failed, return failure\r
- }\r
- else\r
- return(SDL_CheckSB(port)); // User specified address or default\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_SBSetDMA() - Sets the DMA channel to be used by the SoundBlaster\r
-// code. Sets up sbDMA, and sbDMAa1-sbDMAa3 (used by SDL_SBPlaySeg()).\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SDL_SBSetDMA(byte channel)\r
-{\r
- if (channel > 3)\r
- Quit("SDL_SBSetDMA() - invalid SoundBlaster DMA channel");\r
-\r
- sbDMA = channel;\r
- sbDMAa1 = sba1Vals[channel];\r
- sbDMAa2 = sba2Vals[channel];\r
- sbDMAa3 = sba3Vals[channel];\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_StartSB() - Turns on the SoundBlaster\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_StartSB(void)\r
-{\r
- byte timevalue,test;\r
-\r
- sbIntVec = sbIntVectors[sbInterrupt];\r
- if (sbIntVec < 0)\r
- Quit("SDL_StartSB: Illegal or unsupported interrupt number for SoundBlaster");\r
-\r
- sbOldIntHand = getvect(sbIntVec); // Get old interrupt handler\r
- setvect(sbIntVec,SDL_SBService); // Set mine\r
-\r
- sbWriteDelay();\r
- sbOut(sbWriteCmd,0xd1); // Turn on DSP speaker\r
-\r
- // Set the SoundBlaster DAC time constant for 7KHz\r
- timevalue = 256 - (1000000 / 7000);\r
- sbWriteDelay();\r
- sbOut(sbWriteCmd,0x40);\r
- sbWriteDelay();\r
- sbOut(sbWriteData,timevalue);\r
-\r
- SBProPresent = false;\r
- if (sbNoProCheck)\r
- return;\r
-\r
- // Check to see if this is a SB Pro\r
- sbOut(sbpMixerAddr,sbpmFMVol);\r
- sbpOldFMMix = sbIn(sbpMixerData);\r
- sbOut(sbpMixerData,0xbb);\r
- test = sbIn(sbpMixerData);\r
- if (test == 0xbb)\r
- {\r
- // Boost FM output levels to be equivilent with digitized output\r
- sbOut(sbpMixerData,0xff);\r
- test = sbIn(sbpMixerData);\r
- if (test == 0xff)\r
- {\r
- SBProPresent = true;\r
-\r
- // Save old Voice output levels (SB Pro)\r
- sbOut(sbpMixerAddr,sbpmVoiceVol);\r
- sbpOldVOCMix = sbIn(sbpMixerData);\r
-\r
- // Turn SB Pro stereo DAC off\r
- sbOut(sbpMixerAddr,sbpmControl);\r
- sbOut(sbpMixerData,0); // 0=off,2=on\r
- }\r
- }\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_ShutSB() - Turns off the SoundBlaster\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_ShutSB(void)\r
-{\r
- SDL_SBStopSample();\r
-\r
- if (SBProPresent)\r
- {\r
- // Restore FM output levels (SB Pro)\r
- sbOut(sbpMixerAddr,sbpmFMVol);\r
- sbOut(sbpMixerData,sbpOldFMMix);\r
-\r
- // Restore Voice output levels (SB Pro)\r
- sbOut(sbpMixerAddr,sbpmVoiceVol);\r
- sbOut(sbpMixerData,sbpOldVOCMix);\r
- }\r
-\r
- setvect(sbIntVec,sbOldIntHand); // Set vector back\r
-}\r
-\r
-// Sound Source Code\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_SSStopSample() - Stops a sample playing on the Sound Source\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-#ifdef _MUSE_\r
-void\r
-#else\r
-static void\r
-#endif\r
-SDL_SSStopSample(void)\r
-{\r
-asm pushf\r
-asm cli\r
-\r
- (long)ssSample = 0;\r
-\r
-asm popf\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_SSService() - Handles playing the next sample on the Sound Source\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_SSService(void)\r
-{\r
- boolean gotit;\r
- byte v;\r
-\r
- while (ssSample)\r
- {\r
- asm mov dx,[ssStatus] // Check to see if FIFO is currently empty\r
- asm in al,dx\r
- asm test al,0x40\r
- asm jnz done // Nope - don't push any more data out\r
-\r
- v = *ssSample++;\r
- if (!(--ssLengthLeft))\r
- {\r
- (long)ssSample = 0;\r
- SDL_DigitizedDone();\r
- }\r
-\r
- asm mov dx,[ssData] // Pump the value out\r
- asm mov al,[v]\r
- asm out dx,al\r
-\r
- asm mov dx,[ssControl] // Pulse printer select\r
- asm mov al,[ssOff]\r
- asm out dx,al\r
- asm push ax\r
- asm pop ax\r
- asm mov al,[ssOn]\r
- asm out dx,al\r
-\r
- asm push ax // Delay a short while\r
- asm pop ax\r
- asm push ax\r
- asm pop ax\r
- }\r
-done:;\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_SSPlaySample() - Plays the specified sample on the Sound Source\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-#ifdef _MUSE_\r
-void\r
-#else\r
-static void\r
-#endif\r
-SDL_SSPlaySample(byte huge *data,longword len)\r
-{\r
-asm pushf\r
-asm cli\r
-\r
- ssLengthLeft = len;\r
- ssSample = (volatile byte far *)data;\r
-\r
-asm popf\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_StartSS() - Sets up for and turns on the Sound Source\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_StartSS(void)\r
-{\r
- if (ssPort == 3)\r
- ssControl = 0x27a; // If using LPT3\r
- else if (ssPort == 2)\r
- ssControl = 0x37a; // If using LPT2\r
- else\r
- ssControl = 0x3be; // If using LPT1\r
- ssStatus = ssControl - 1;\r
- ssData = ssStatus - 1;\r
-\r
- ssOn = 0x04;\r
- if (ssIsTandy)\r
- ssOff = 0x0e; // Tandy wierdness\r
- else\r
- ssOff = 0x0c; // For normal machines\r
-\r
- outportb(ssControl,ssOn); // Enable SS\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_ShutSS() - Turns off the Sound Source\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_ShutSS(void)\r
-{\r
- outportb(ssControl,ssOff);\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_CheckSS() - Checks to see if a Sound Source is present at the\r
-// location specified by the sound source variables\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static boolean\r
-SDL_CheckSS(void)\r
-{\r
- boolean present = false;\r
- longword lasttime;\r
-\r
- // Turn the Sound Source on and wait awhile (4 ticks)\r
- SDL_StartSS();\r
-\r
- lasttime = TimeCount;\r
- while (TimeCount < lasttime + 4)\r
- ;\r
-\r
-asm mov dx,[ssStatus] // Check to see if FIFO is currently empty\r
-asm in al,dx\r
-asm test al,0x40\r
-asm jnz checkdone // Nope - Sound Source not here\r
-\r
-asm mov cx,32 // Force FIFO overflow (FIFO is 16 bytes)\r
-outloop:\r
-asm mov dx,[ssData] // Pump a neutral value out\r
-asm mov al,0x80\r
-asm out dx,al\r
-\r
-asm mov dx,[ssControl] // Pulse printer select\r
-asm mov al,[ssOff]\r
-asm out dx,al\r
-asm push ax\r
-asm pop ax\r
-asm mov al,[ssOn]\r
-asm out dx,al\r
-\r
-asm push ax // Delay a short while before we do this again\r
-asm pop ax\r
-asm push ax\r
-asm pop ax\r
-\r
-asm loop outloop\r
-\r
-asm mov dx,[ssStatus] // Is FIFO overflowed now?\r
-asm in al,dx\r
-asm test al,0x40\r
-asm jz checkdone // Nope, still not - Sound Source not here\r
-\r
- present = true; // Yes - it's here!\r
-\r
-checkdone:\r
- SDL_ShutSS();\r
- return(present);\r
-}\r
-\r
-static boolean\r
-SDL_DetectSoundSource(void)\r
-{\r
- for (ssPort = 1;ssPort <= 3;ssPort++)\r
- if (SDL_CheckSS())\r
- return(true);\r
- return(false);\r
-}\r
-\r
-//\r
-// PC Sound code\r
-//\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_PCPlaySample() - Plays the specified sample on the PC speaker\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-#ifdef _MUSE_\r
-void\r
-#else\r
-static void\r
-#endif\r
-SDL_PCPlaySample(byte huge *data,longword len)\r
-{\r
-asm pushf\r
-asm cli\r
-\r
- SDL_IndicatePC(true);\r
-\r
- pcLengthLeft = len;\r
- pcSound = (volatile byte far *)data;\r
-\r
-asm popf\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_PCStopSample() - Stops a sample playing on the PC speaker\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-#ifdef _MUSE_\r
-void\r
-#else\r
-static void\r
-#endif\r
-SDL_PCStopSample(void)\r
-{\r
-asm pushf\r
-asm cli\r
-\r
- (long)pcSound = 0;\r
-\r
- SDL_IndicatePC(false);\r
-\r
-asm in al,0x61 // Turn the speaker off\r
-asm and al,0xfd // ~2\r
-asm out 0x61,al\r
-\r
-asm popf\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_PCPlaySound() - Plays the specified sound on the PC speaker\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-#ifdef _MUSE_\r
-void\r
-#else\r
-static void\r
-#endif\r
-SDL_PCPlaySound(PCSound far *sound)\r
-{\r
-asm pushf\r
-asm cli\r
-\r
- pcLastSample = -1;\r
- pcLengthLeft = sound->common.length;\r
- pcSound = sound->data;\r
-\r
-asm popf\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_PCStopSound() - Stops the current sound playing on the PC Speaker\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-#ifdef _MUSE_\r
-void\r
-#else\r
-static void\r
-#endif\r
-SDL_PCStopSound(void)\r
-{\r
-asm pushf\r
-asm cli\r
-\r
- (long)pcSound = 0;\r
-\r
-asm in al,0x61 // Turn the speaker off\r
-asm and al,0xfd // ~2\r
-asm out 0x61,al\r
-\r
-asm popf\r
-}\r
-\r
-#if 0\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_PCService() - Handles playing the next sample in a PC sound\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_PCService(void)\r
-{\r
- byte s;\r
- word t;\r
-\r
- if (pcSound)\r
- {\r
- s = *pcSound++;\r
- if (s != pcLastSample)\r
- {\r
- asm pushf\r
- asm cli\r
-\r
- pcLastSample = s;\r
- if (s) // We have a frequency!\r
- {\r
- t = pcSoundLookup[s];\r
- asm mov bx,[t]\r
-\r
- asm mov al,0xb6 // Write to channel 2 (speaker) timer\r
- asm out 43h,al\r
- asm mov al,bl\r
- asm out 42h,al // Low byte\r
- asm mov al,bh\r
- asm out 42h,al // High byte\r
-\r
- asm in al,0x61 // Turn the speaker & gate on\r
- asm or al,3\r
- asm out 0x61,al\r
- }\r
- else // Time for some silence\r
- {\r
- asm in al,0x61 // Turn the speaker & gate off\r
- asm and al,0xfc // ~3\r
- asm out 0x61,al\r
- }\r
-\r
- asm popf\r
- }\r
-\r
- if (!(--pcLengthLeft))\r
- {\r
- SDL_PCStopSound();\r
- SDL_SoundFinished();\r
- }\r
- }\r
-}\r
-#endif\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_ShutPC() - Turns off the pc speaker\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_ShutPC(void)\r
-{\r
-asm pushf\r
-asm cli\r
-\r
- pcSound = 0;\r
-\r
-asm in al,0x61 // Turn the speaker & gate off\r
-asm and al,0xfc // ~3\r
-asm out 0x61,al\r
-\r
-asm popf\r
-}\r
-\r
-//\r
-// Stuff for digitized sounds\r
-//\r
-memptr\r
-SDL_LoadDigiSegment(word page)\r
-{\r
- memptr addr;\r
-\r
-#if 0 // for debugging\r
-asm mov dx,STATUS_REGISTER_1\r
-asm in al,dx\r
-asm mov dx,ATR_INDEX\r
-asm mov al,ATR_OVERSCAN\r
-asm out dx,al\r
-asm mov al,10 // bright green\r
-asm out dx,al\r
-#endif\r
-\r
- addr = PM_GetSoundPage(page);\r
- PM_SetPageLock(PMSoundStart + page,pml_Locked);\r
-\r
-#if 0 // for debugging\r
-asm mov dx,STATUS_REGISTER_1\r
-asm in al,dx\r
-asm mov dx,ATR_INDEX\r
-asm mov al,ATR_OVERSCAN\r
-asm out dx,al\r
-asm mov al,3 // blue\r
-asm out dx,al\r
-asm mov al,0x20 // normal\r
-asm out dx,al\r
-#endif\r
-\r
- return(addr);\r
-}\r
-\r
-void\r
-SDL_PlayDigiSegment(memptr addr,word len)\r
-{\r
- switch (DigiMode)\r
- {\r
- case sds_PC:\r
- SDL_PCPlaySample(addr,len);\r
- break;\r
- case sds_SoundSource:\r
- SDL_SSPlaySample(addr,len);\r
- break;\r
- case sds_SoundBlaster:\r
- SDL_SBPlaySample(addr,len);\r
- break;\r
- }\r
-}\r
-\r
-void\r
-SD_StopDigitized(void)\r
-{\r
- int i;\r
-\r
-asm pushf\r
-asm cli\r
-\r
- DigiLeft = 0;\r
- DigiNextAddr = nil;\r
- DigiNextLen = 0;\r
- DigiMissed = false;\r
- DigiPlaying = false;\r
- DigiNumber = DigiPriority = 0;\r
- SoundPositioned = false;\r
- if ((DigiMode == sds_PC) && (SoundMode == sdm_PC))\r
- SDL_SoundFinished();\r
-\r
- switch (DigiMode)\r
- {\r
- case sds_PC:\r
- SDL_PCStopSample();\r
- break;\r
- case sds_SoundSource:\r
- SDL_SSStopSample();\r
- break;\r
- case sds_SoundBlaster:\r
- SDL_SBStopSample();\r
- break;\r
- }\r
-\r
-asm popf\r
-\r
- for (i = DigiLastStart;i < DigiLastEnd;i++)\r
- PM_SetPageLock(i + PMSoundStart,pml_Unlocked);\r
- DigiLastStart = 1;\r
- DigiLastEnd = 0;\r
-}\r
-\r
-void\r
-SD_Poll(void)\r
-{\r
- if (DigiLeft && !DigiNextAddr)\r
- {\r
- DigiNextLen = (DigiLeft >= PMPageSize)? PMPageSize : (DigiLeft % PMPageSize);\r
- DigiLeft -= DigiNextLen;\r
- if (!DigiLeft)\r
- DigiLastSegment = true;\r
- DigiNextAddr = SDL_LoadDigiSegment(DigiPage++);\r
- }\r
- if (DigiMissed && DigiNextAddr)\r
- {\r
- SDL_PlayDigiSegment(DigiNextAddr,DigiNextLen);\r
- DigiNextAddr = nil;\r
- DigiMissed = false;\r
- if (DigiLastSegment)\r
- {\r
- DigiPlaying = false;\r
- DigiLastSegment = false;\r
- }\r
- }\r
- SDL_SetTimerSpeed();\r
-}\r
-\r
-void\r
-SD_SetPosition(int leftpos,int rightpos)\r
-{\r
- if\r
- (\r
- (leftpos < 0)\r
- || (leftpos > 15)\r
- || (rightpos < 0)\r
- || (rightpos > 15)\r
- || ((leftpos == 15) && (rightpos == 15))\r
- )\r
- Quit("SD_SetPosition: Illegal position");\r
-\r
- switch (DigiMode)\r
- {\r
- case sds_SoundBlaster:\r
- SDL_PositionSBP(leftpos,rightpos);\r
- break;\r
- }\r
-}\r
-\r
-void\r
-SD_PlayDigitized(word which,int leftpos,int rightpos)\r
-{\r
- word len;\r
- memptr addr;\r
-\r
- if (!DigiMode)\r
- return;\r
-\r
- SD_StopDigitized();\r
- if (which >= NumDigi)\r
- Quit("SD_PlayDigitized: bad sound number");\r
-\r
- SD_SetPosition(leftpos,rightpos);\r
-\r
- DigiPage = DigiList[(which * 2) + 0];\r
- DigiLeft = DigiList[(which * 2) + 1];\r
-\r
- DigiLastStart = DigiPage;\r
- DigiLastEnd = DigiPage + ((DigiLeft + (PMPageSize - 1)) / PMPageSize);\r
-\r
- len = (DigiLeft >= PMPageSize)? PMPageSize : (DigiLeft % PMPageSize);\r
- addr = SDL_LoadDigiSegment(DigiPage++);\r
-\r
- DigiPlaying = true;\r
- DigiLastSegment = false;\r
-\r
- SDL_PlayDigiSegment(addr,len);\r
- DigiLeft -= len;\r
- if (!DigiLeft)\r
- DigiLastSegment = true;\r
-\r
- SD_Poll();\r
-}\r
-\r
-void\r
-SDL_DigitizedDone(void)\r
-{\r
- if (DigiNextAddr)\r
- {\r
- SDL_PlayDigiSegment(DigiNextAddr,DigiNextLen);\r
- DigiNextAddr = nil;\r
- DigiMissed = false;\r
- }\r
- else\r
- {\r
- if (DigiLastSegment)\r
- {\r
- DigiPlaying = false;\r
- DigiLastSegment = false;\r
- if ((DigiMode == sds_PC) && (SoundMode == sdm_PC))\r
- {\r
- SDL_SoundFinished();\r
- }\r
- else\r
- DigiNumber = DigiPriority = 0;\r
- SoundPositioned = false;\r
- }\r
- else\r
- DigiMissed = true;\r
- }\r
-}\r
-\r
-void\r
-SD_SetDigiDevice(SDSMode mode)\r
-{\r
- boolean devicenotpresent;\r
-\r
- if (mode == DigiMode)\r
- return;\r
-\r
- SD_StopDigitized();\r
-\r
- devicenotpresent = false;\r
- switch (mode)\r
- {\r
- case sds_SoundBlaster:\r
- if (!SoundBlasterPresent)\r
- {\r
- if (SoundSourcePresent)\r
- mode = sds_SoundSource;\r
- else\r
- devicenotpresent = true;\r
- }\r
- break;\r
- case sds_SoundSource:\r
- if (!SoundSourcePresent)\r
- devicenotpresent = true;\r
- break;\r
- }\r
-\r
- if (!devicenotpresent)\r
- {\r
- if (DigiMode == sds_SoundSource)\r
- SDL_ShutSS();\r
-\r
- DigiMode = mode;\r
-\r
- if (mode == sds_SoundSource)\r
- SDL_StartSS();\r
-\r
- SDL_SetTimerSpeed();\r
- }\r
-}\r
-\r
-void\r
-SDL_SetupDigi(void)\r
-{\r
- memptr list;\r
- word far *p,\r
- pg;\r
- int i;\r
-\r
- PM_UnlockMainMem();\r
- MM_GetPtr(&list,PMPageSize);\r
- PM_CheckMainMem();\r
- p = (word far *)MK_FP(PM_GetPage(ChunksInFile - 1),0);\r
- _fmemcpy((void far *)list,(void far *)p,PMPageSize);\r
- pg = PMSoundStart;\r
- for (i = 0;i < PMPageSize / (sizeof(word) * 2);i++,p += 2)\r
- {\r
- if (pg >= ChunksInFile - 1)\r
- break;\r
- pg += (p[1] + (PMPageSize - 1)) / PMPageSize;\r
- }\r
- PM_UnlockMainMem();\r
- MM_GetPtr((memptr *)&DigiList,i * sizeof(word) * 2);\r
- _fmemcpy((void far *)DigiList,(void far *)list,i * sizeof(word) * 2);\r
- MM_FreePtr(&list);\r
- NumDigi = i;\r
-\r
- for (i = 0;i < LASTSOUND;i++)\r
- DigiMap[i] = -1;\r
-}\r
-\r
-// AdLib Code\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// alOut(n,b) - Puts b in AdLib card register n\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-alOut(byte n,byte b)\r
-{\r
-asm pushf\r
-asm cli\r
-\r
-asm mov dx,0x388\r
-asm mov al,[n]\r
-asm out dx,al\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm inc dx\r
-asm mov al,[b]\r
-asm out dx,al\r
-\r
-asm popf\r
-\r
-asm dec dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-asm in al,dx\r
-}\r
-\r
-#if 0\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_SetInstrument() - Puts an instrument into a generator\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_SetInstrument(int track,int which,Instrument far *inst,boolean percussive)\r
-{\r
- byte c,m;\r
-\r
- if (percussive)\r
- {\r
- c = pcarriers[which];\r
- m = pmodifiers[which];\r
- }\r
- else\r
- {\r
- c = carriers[which];\r
- m = modifiers[which];\r
- }\r
-\r
- tracks[track - 1]->inst = *inst;\r
- tracks[track - 1]->percussive = percussive;\r
-\r
- alOut(m + alChar,inst->mChar);\r
- alOut(m + alScale,inst->mScale);\r
- alOut(m + alAttack,inst->mAttack);\r
- alOut(m + alSus,inst->mSus);\r
- alOut(m + alWave,inst->mWave);\r
-\r
- // Most percussive instruments only use one cell\r
- if (c != 0xff)\r
- {\r
- alOut(c + alChar,inst->cChar);\r
- alOut(c + alScale,inst->cScale);\r
- alOut(c + alAttack,inst->cAttack);\r
- alOut(c + alSus,inst->cSus);\r
- alOut(c + alWave,inst->cWave);\r
- }\r
-\r
- alOut(which + alFeedCon,inst->nConn); // DEBUG - I think this is right\r
-}\r
-#endif\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_ALStopSound() - Turns off any sound effects playing through the\r
-// AdLib card\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-#ifdef _MUSE_\r
-void\r
-#else\r
-static void\r
-#endif\r
-SDL_ALStopSound(void)\r
-{\r
-asm pushf\r
-asm cli\r
-\r
- (long)alSound = 0;\r
- alOut(alFreqH + 0,0);\r
-\r
-asm popf\r
-}\r
-\r
-static void\r
-SDL_AlSetFXInst(Instrument far *inst)\r
-{\r
- byte c,m;\r
-\r
- m = modifiers[0];\r
- c = carriers[0];\r
- alOut(m + alChar,inst->mChar);\r
- alOut(m + alScale,inst->mScale);\r
- alOut(m + alAttack,inst->mAttack);\r
- alOut(m + alSus,inst->mSus);\r
- alOut(m + alWave,inst->mWave);\r
- alOut(c + alChar,inst->cChar);\r
- alOut(c + alScale,inst->cScale);\r
- alOut(c + alAttack,inst->cAttack);\r
- alOut(c + alSus,inst->cSus);\r
- alOut(c + alWave,inst->cWave);\r
-\r
- // Note: Switch commenting on these lines for old MUSE compatibility\r
-// alOut(alFeedCon,inst->nConn);\r
- alOut(alFeedCon,0);\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_ALPlaySound() - Plays the specified sound on the AdLib card\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-#ifdef _MUSE_\r
-void\r
-#else\r
-static void\r
-#endif\r
-SDL_ALPlaySound(AdLibSound far *sound)\r
-{\r
- Instrument far *inst;\r
- byte huge *data;\r
-\r
- SDL_ALStopSound();\r
-\r
-asm pushf\r
-asm cli\r
-\r
- alLengthLeft = sound->common.length;\r
- data = sound->data;\r
- data++;\r
- data--;\r
- alSound = (byte far *)data;\r
- alBlock = ((sound->block & 7) << 2) | 0x20;\r
- inst = &sound->inst;\r
-\r
- if (!(inst->mSus | inst->cSus))\r
- {\r
- asm popf\r
- Quit("SDL_ALPlaySound() - Bad instrument");\r
- }\r
-\r
- SDL_AlSetFXInst(&alZeroInst); // DEBUG\r
- SDL_AlSetFXInst(inst);\r
-\r
-asm popf\r
-}\r
-\r
-#if 0\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_ALSoundService() - Plays the next sample out through the AdLib card\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-//static void\r
-void\r
-SDL_ALSoundService(void)\r
-{\r
- byte s;\r
-\r
- if (alSound)\r
- {\r
- s = *alSound++;\r
- if (!s)\r
- alOut(alFreqH + 0,0);\r
- else\r
- {\r
- alOut(alFreqL + 0,s);\r
- alOut(alFreqH + 0,alBlock);\r
- }\r
-\r
- if (!(--alLengthLeft))\r
- {\r
- (long)alSound = 0;\r
- alOut(alFreqH + 0,0);\r
- SDL_SoundFinished();\r
- }\r
- }\r
-}\r
-#endif\r
-\r
-#if 0\r
-void\r
-SDL_ALService(void)\r
-{\r
- byte a,v;\r
- word w;\r
-\r
- if (!sqActive)\r
- return;\r
-\r
- while (sqHackLen && (sqHackTime <= alTimeCount))\r
- {\r
- w = *sqHackPtr++;\r
- sqHackTime = alTimeCount + *sqHackPtr++;\r
- asm mov dx,[w]\r
- asm mov [a],dl\r
- asm mov [v],dh\r
- alOut(a,v);\r
- sqHackLen -= 4;\r
- }\r
- alTimeCount++;\r
- if (!sqHackLen)\r
- {\r
- sqHackPtr = (word far *)sqHack;\r
- sqHackLen = sqHackSeqLen;\r
- alTimeCount = sqHackTime = 0;\r
- }\r
-}\r
-#endif\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_ShutAL() - Shuts down the AdLib card for sound effects\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_ShutAL(void)\r
-{\r
-asm pushf\r
-asm cli\r
-\r
- alOut(alEffects,0);\r
- alOut(alFreqH + 0,0);\r
- SDL_AlSetFXInst(&alZeroInst);\r
- alSound = 0;\r
-\r
-asm popf\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_CleanAL() - Totally shuts down the AdLib card\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_CleanAL(void)\r
-{\r
- int i;\r
-\r
-asm pushf\r
-asm cli\r
-\r
- alOut(alEffects,0);\r
- for (i = 1;i < 0xf5;i++)\r
- alOut(i,0);\r
-\r
-asm popf\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_StartAL() - Starts up the AdLib card for sound effects\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_StartAL(void)\r
-{\r
- alFXReg = 0;\r
- alOut(alEffects,alFXReg);\r
- SDL_AlSetFXInst(&alZeroInst);\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_DetectAdLib() - Determines if there's an AdLib (or SoundBlaster\r
-// emulating an AdLib) present\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static boolean\r
-SDL_DetectAdLib(void)\r
-{\r
- byte status1,status2;\r
- int i;\r
-\r
- alOut(4,0x60); // Reset T1 & T2\r
- alOut(4,0x80); // Reset IRQ\r
- status1 = readstat();\r
- alOut(2,0xff); // Set timer 1\r
- alOut(4,0x21); // Start timer 1\r
-#if 0\r
- SDL_Delay(TimerDelay100);\r
-#else\r
-asm mov dx,0x388\r
-asm mov cx,100\r
-usecloop:\r
-asm in al,dx\r
-asm loop usecloop\r
-#endif\r
-\r
- status2 = readstat();\r
- alOut(4,0x60);\r
- alOut(4,0x80);\r
-\r
- if (((status1 & 0xe0) == 0x00) && ((status2 & 0xe0) == 0xc0))\r
- {\r
- for (i = 1;i <= 0xf5;i++) // Zero all the registers\r
- alOut(i,0);\r
-\r
- alOut(1,0x20); // Set WSE=1\r
- alOut(8,0); // Set CSM=0 & SEL=0\r
-\r
- return(true);\r
- }\r
- else\r
- return(false);\r
-}\r
-\r
-#if 0\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_t0Service() - My timer 0 ISR which handles the different timings and\r
-// dispatches to whatever other routines are appropriate\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void interrupt\r
-SDL_t0Service(void)\r
-{\r
-static word count = 1;\r
-\r
-#if 1 // for debugging\r
-asm mov dx,STATUS_REGISTER_1\r
-asm in al,dx\r
-asm mov dx,ATR_INDEX\r
-asm mov al,ATR_OVERSCAN\r
-asm out dx,al\r
-asm mov al,4 // red\r
-asm out dx,al\r
-#endif\r
-\r
- HackCount++;\r
-\r
- if ((MusicMode == smm_AdLib) || (DigiMode == sds_SoundSource))\r
- {\r
- SDL_ALService();\r
- SDL_SSService();\r
-// if (!(++count & 7))\r
- if (!(++count % 10))\r
- {\r
- LocalTime++;\r
- TimeCount++;\r
- if (SoundUserHook)\r
- SoundUserHook();\r
- }\r
-// if (!(count & 3))\r
- if (!(count % 5))\r
- {\r
- switch (SoundMode)\r
- {\r
- case sdm_PC:\r
- SDL_PCService();\r
- break;\r
- case sdm_AdLib:\r
- SDL_ALSoundService();\r
- break;\r
- }\r
- }\r
- }\r
- else\r
- {\r
- if (!(++count & 1))\r
- {\r
- LocalTime++;\r
- TimeCount++;\r
- if (SoundUserHook)\r
- SoundUserHook();\r
- }\r
- switch (SoundMode)\r
- {\r
- case sdm_PC:\r
- SDL_PCService();\r
- break;\r
- case sdm_AdLib:\r
- SDL_ALSoundService();\r
- break;\r
- }\r
- }\r
-\r
-asm mov ax,[WORD PTR TimerCount]\r
-asm add ax,[WORD PTR TimerDivisor]\r
-asm mov [WORD PTR TimerCount],ax\r
-asm jnc myack\r
- t0OldService(); // If we overflow a word, time to call old int handler\r
-asm jmp olddone\r
-myack:;\r
- outportb(0x20,0x20); // Ack the interrupt\r
-olddone:;\r
-\r
-#if 1 // for debugging\r
-asm mov dx,STATUS_REGISTER_1\r
-asm in al,dx\r
-asm mov dx,ATR_INDEX\r
-asm mov al,ATR_OVERSCAN\r
-asm out dx,al\r
-asm mov al,3 // blue\r
-asm out dx,al\r
-asm mov al,0x20 // normal\r
-asm out dx,al\r
-#endif\r
-}\r
-#endif\r
-\r
-////////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_ShutDevice() - turns off whatever device was being used for sound fx\r
-//\r
-////////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_ShutDevice(void)\r
-{\r
- switch (SoundMode)\r
- {\r
- case sdm_PC:\r
- SDL_ShutPC();\r
- break;\r
- case sdm_AdLib:\r
- SDL_ShutAL();\r
- break;\r
- }\r
- SoundMode = sdm_Off;\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_CleanDevice() - totally shuts down all sound devices\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_CleanDevice(void)\r
-{\r
- if ((SoundMode == sdm_AdLib) || (MusicMode == smm_AdLib))\r
- SDL_CleanAL();\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SDL_StartDevice() - turns on whatever device is to be used for sound fx\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-static void\r
-SDL_StartDevice(void)\r
-{\r
- switch (SoundMode)\r
- {\r
- case sdm_AdLib:\r
- SDL_StartAL();\r
- break;\r
- }\r
- SoundNumber = SoundPriority = 0;\r
-}\r
-\r
-// Public routines\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_SetSoundMode() - Sets which sound hardware to use for sound effects\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-boolean\r
-SD_SetSoundMode(SDMode mode)\r
-{\r
- boolean result = false;\r
- word tableoffset;\r
-\r
- SD_StopSound();\r
-\r
-#ifndef _MUSE_\r
- if ((mode == sdm_AdLib) && !AdLibPresent)\r
- mode = sdm_PC;\r
-\r
- switch (mode)\r
- {\r
- case sdm_Off:\r
- NeedsDigitized = false;\r
- result = true;\r
- break;\r
- case sdm_PC:\r
- tableoffset = STARTPCSOUNDS;\r
- NeedsDigitized = false;\r
- result = true;\r
- break;\r
- case sdm_AdLib:\r
- if (AdLibPresent)\r
- {\r
- tableoffset = STARTADLIBSOUNDS;\r
- NeedsDigitized = false;\r
- result = true;\r
- }\r
- break;\r
- }\r
-#else\r
- result = true;\r
-#endif\r
-\r
- if (result && (mode != SoundMode))\r
- {\r
- SDL_ShutDevice();\r
- SoundMode = mode;\r
-#ifndef _MUSE_\r
- SoundTable = (word *)(&audiosegs[tableoffset]);\r
-#endif\r
- SDL_StartDevice();\r
- }\r
-\r
- SDL_SetTimerSpeed();\r
-\r
- return(result);\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_SetMusicMode() - sets the device to use for background music\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-boolean\r
-SD_SetMusicMode(SMMode mode)\r
-{\r
- boolean result = false;\r
-\r
- SD_FadeOutMusic();\r
- while (SD_MusicPlaying())\r
- ;\r
-\r
- switch (mode)\r
- {\r
- case smm_Off:\r
- NeedsMusic = false;\r
- result = true;\r
- break;\r
- case smm_AdLib:\r
- if (AdLibPresent)\r
- {\r
- NeedsMusic = true;\r
- result = true;\r
- }\r
- break;\r
- }\r
-\r
- if (result)\r
- MusicMode = mode;\r
-\r
- SDL_SetTimerSpeed();\r
-\r
- return(result);\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_Startup() - starts up the Sound Mgr\r
-// Detects all additional sound hardware and installs my ISR\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SD_Startup(void)\r
-{\r
- int i;\r
-\r
- if (SD_Started)\r
- return;\r
-\r
- SDL_SetDS();\r
-\r
- ssIsTandy = false;\r
- ssNoCheck = false;\r
- alNoCheck = false;\r
- sbNoCheck = false;\r
- sbNoProCheck = false;\r
-#ifndef _MUSE_\r
- for (i = 1;i < _argc;i++)\r
- {\r
- switch (US_CheckParm(_argv[i],ParmStrings))\r
- {\r
- case 0: // No AdLib detection\r
- alNoCheck = true;\r
- break;\r
- case 1: // No SoundBlaster detection\r
- sbNoCheck = true;\r
- break;\r
- case 2: // No SoundBlaster Pro detection\r
- sbNoProCheck = true;\r
- break;\r
- case 3:\r
- ssNoCheck = true; // No Sound Source detection\r
- break;\r
- case 4: // Tandy Sound Source handling\r
- ssIsTandy = true;\r
- break;\r
- case 5: // Sound Source present at LPT1\r
- ssPort = 1;\r
- ssNoCheck = SoundSourcePresent = true;\r
- break;\r
- case 6: // Sound Source present at LPT2\r
- ssPort = 2;\r
- ssNoCheck = SoundSourcePresent = true;\r
- break;\r
- case 7: // Sound Source present at LPT3\r
- ssPort = 3;\r
- ssNoCheck = SoundSourcePresent = true;\r
- break;\r
- }\r
- }\r
-#endif\r
-\r
- SoundUserHook = 0;\r
-\r
- t0OldService = getvect(8); // Get old timer 0 ISR\r
-\r
- LocalTime = TimeCount = alTimeCount = 0;\r
-\r
- SD_SetSoundMode(sdm_Off);\r
- SD_SetMusicMode(smm_Off);\r
-\r
- if (!ssNoCheck)\r
- SoundSourcePresent = SDL_DetectSoundSource();\r
-\r
- if (!alNoCheck)\r
- {\r
- AdLibPresent = SDL_DetectAdLib();\r
- if (AdLibPresent && !sbNoCheck)\r
- {\r
- int port = -1;\r
- char *env = getenv("BLASTER");\r
- if (env)\r
- {\r
- long temp;\r
- while (*env)\r
- {\r
- while (isspace(*env))\r
- env++;\r
-\r
- switch (toupper(*env))\r
- {\r
- case 'A':\r
- temp = strtol(env + 1,&env,16);\r
- if\r
- (\r
- (temp >= 0x210)\r
- && (temp <= 0x260)\r
- && (!(temp & 0x00f))\r
- )\r
- port = (temp - 0x200) >> 4;\r
- else\r
- Quit("SD_Startup: Unsupported address value in BLASTER");\r
- break;\r
- case 'I':\r
- temp = strtol(env + 1,&env,10);\r
- if\r
- (\r
- (temp >= 0)\r
- && (temp <= 10)\r
- && (sbIntVectors[temp] != -1)\r
- )\r
- {\r
- sbInterrupt = temp;\r
- sbIntVec = sbIntVectors[sbInterrupt];\r
- }\r
- else\r
- Quit("SD_Startup: Unsupported interrupt value in BLASTER");\r
- break;\r
- case 'D':\r
- temp = strtol(env + 1,&env,10);\r
- if ((temp == 0) || (temp == 1) || (temp == 3))\r
- SDL_SBSetDMA(temp);\r
- else\r
- Quit("SD_Startup: Unsupported DMA value in BLASTER");\r
- break;\r
- default:\r
- while (isspace(*env))\r
- env++;\r
- while (*env && !isspace(*env))\r
- env++;\r
- break;\r
- }\r
- }\r
- }\r
- SoundBlasterPresent = SDL_DetectSoundBlaster(port);\r
- }\r
- }\r
-\r
- for (i = 0;i < 255;i++)\r
- pcSoundLookup[i] = i * 60;\r
-\r
- if (SoundBlasterPresent)\r
- SDL_StartSB();\r
-\r
- SDL_SetupDigi();\r
-\r
- SD_Started = true;\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_Default() - Sets up the default behaviour for the Sound Mgr whether\r
-// the config file was present or not.\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SD_Default(boolean gotit,SDMode sd,SMMode sm)\r
-{\r
- boolean gotsd,gotsm;\r
-\r
- gotsd = gotsm = gotit;\r
-\r
- if (gotsd) // Make sure requested sound hardware is available\r
- {\r
- switch (sd)\r
- {\r
- case sdm_AdLib:\r
- gotsd = AdLibPresent;\r
- break;\r
- }\r
- }\r
- if (!gotsd)\r
- {\r
- if (AdLibPresent)\r
- sd = sdm_AdLib;\r
- else\r
- sd = sdm_PC;\r
- }\r
- if (sd != SoundMode)\r
- SD_SetSoundMode(sd);\r
-\r
-\r
- if (gotsm) // Make sure requested music hardware is available\r
- {\r
- switch (sm)\r
- {\r
- case sdm_AdLib:\r
- gotsm = AdLibPresent;\r
- break;\r
- }\r
- }\r
- if (!gotsm)\r
- {\r
- if (AdLibPresent)\r
- sm = smm_AdLib;\r
- }\r
- if (sm != MusicMode)\r
- SD_SetMusicMode(sm);\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_Shutdown() - shuts down the Sound Mgr\r
-// Removes sound ISR and turns off whatever sound hardware was active\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SD_Shutdown(void)\r
-{\r
- if (!SD_Started)\r
- return;\r
-\r
- SD_MusicOff();\r
- SD_StopSound();\r
- SDL_ShutDevice();\r
- SDL_CleanDevice();\r
-\r
- if (SoundBlasterPresent)\r
- SDL_ShutSB();\r
-\r
- if (SoundSourcePresent)\r
- SDL_ShutSS();\r
-\r
- asm pushf\r
- asm cli\r
-\r
- SDL_SetTimer0(0);\r
-\r
- setvect(8,t0OldService);\r
-\r
- asm popf\r
-\r
- SD_Started = false;\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_SetUserHook() - sets the routine that the Sound Mgr calls every 1/70th\r
-// of a second from its timer 0 ISR\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SD_SetUserHook(void (* hook)(void))\r
-{\r
- SoundUserHook = hook;\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_PositionSound() - Sets up a stereo imaging location for the next\r
-// sound to be played. Each channel ranges from 0 to 15.\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SD_PositionSound(int leftvol,int rightvol)\r
-{\r
- LeftPosition = leftvol;\r
- RightPosition = rightvol;\r
- nextsoundpos = true;\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_PlaySound() - plays the specified sound on the appropriate hardware\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-boolean\r
-SD_PlaySound(soundnames sound)\r
-{\r
- boolean ispos;\r
- SoundCommon far *s;\r
- int lp,rp;\r
-\r
- lp = LeftPosition;\r
- rp = RightPosition;\r
- LeftPosition = 0;\r
- RightPosition = 0;\r
-\r
- ispos = nextsoundpos;\r
- nextsoundpos = false;\r
-\r
- if (sound == -1)\r
- return(false);\r
-\r
- s = MK_FP(SoundTable[sound],0);\r
- if ((SoundMode != sdm_Off) && !s)\r
- Quit("SD_PlaySound() - Uncached sound");\r
-\r
- if ((DigiMode != sds_Off) && (DigiMap[sound] != -1))\r
- {\r
- if ((DigiMode == sds_PC) && (SoundMode == sdm_PC))\r
- {\r
- if (s->priority < SoundPriority)\r
- return(false);\r
-\r
- SDL_PCStopSound();\r
-\r
- SD_PlayDigitized(DigiMap[sound],lp,rp);\r
- SoundPositioned = ispos;\r
- SoundNumber = sound;\r
- SoundPriority = s->priority;\r
- }\r
- else\r
- {\r
- asm pushf\r
- asm cli\r
- if (DigiPriority && !DigiNumber)\r
- {\r
- asm popf\r
- Quit("SD_PlaySound: Priority without a sound");\r
- }\r
- asm popf\r
-\r
- if (s->priority < DigiPriority)\r
- return(false);\r
-\r
- SD_PlayDigitized(DigiMap[sound],lp,rp);\r
- SoundPositioned = ispos;\r
- DigiNumber = sound;\r
- DigiPriority = s->priority;\r
- }\r
-\r
- return(true);\r
- }\r
-\r
- if (SoundMode == sdm_Off)\r
- return(false);\r
- if (!s->length)\r
- Quit("SD_PlaySound() - Zero length sound");\r
- if (s->priority < SoundPriority)\r
- return(false);\r
-\r
- switch (SoundMode)\r
- {\r
- case sdm_PC:\r
- SDL_PCPlaySound((void far *)s);\r
- break;\r
- case sdm_AdLib:\r
- SDL_ALPlaySound((void far *)s);\r
- break;\r
- }\r
-\r
- SoundNumber = sound;\r
- SoundPriority = s->priority;\r
-\r
- return(false);\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_SoundPlaying() - returns the sound number that's playing, or 0 if\r
-// no sound is playing\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-word\r
-SD_SoundPlaying(void)\r
-{\r
- boolean result = false;\r
-\r
- switch (SoundMode)\r
- {\r
- case sdm_PC:\r
- result = pcSound? true : false;\r
- break;\r
- case sdm_AdLib:\r
- result = alSound? true : false;\r
- break;\r
- }\r
-\r
- if (result)\r
- return(SoundNumber);\r
- else\r
- return(false);\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_StopSound() - if a sound is playing, stops it\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SD_StopSound(void)\r
-{\r
- if (DigiPlaying)\r
- SD_StopDigitized();\r
-\r
- switch (SoundMode)\r
- {\r
- case sdm_PC:\r
- SDL_PCStopSound();\r
- break;\r
- case sdm_AdLib:\r
- SDL_ALStopSound();\r
- break;\r
- }\r
-\r
- SoundPositioned = false;\r
-\r
- SDL_SoundFinished();\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_WaitSoundDone() - waits until the current sound is done playing\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SD_WaitSoundDone(void)\r
-{\r
- while (SD_SoundPlaying())\r
- ;\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_MusicOn() - turns on the sequencer\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SD_MusicOn(void)\r
-{\r
- sqActive = true;\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_MusicOff() - turns off the sequencer and any playing notes\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SD_MusicOff(void)\r
-{\r
- word i;\r
-\r
-\r
- switch (MusicMode)\r
- {\r
- case smm_AdLib:\r
- alFXReg = 0;\r
- alOut(alEffects,0);\r
- for (i = 0;i < sqMaxTracks;i++)\r
- alOut(alFreqH + i + 1,0);\r
- break;\r
- }\r
- sqActive = false;\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_StartMusic() - starts playing the music pointed to\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SD_StartMusic(MusicGroup far *music)\r
-{\r
- SD_MusicOff();\r
-asm pushf\r
-asm cli\r
-\r
- if (MusicMode == smm_AdLib)\r
- {\r
- sqHackPtr = sqHack = music->values;\r
- sqHackSeqLen = sqHackLen = music->length;\r
- sqHackTime = 0;\r
- alTimeCount = 0;\r
- SD_MusicOn();\r
- }\r
-\r
-asm popf\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_FadeOutMusic() - starts fading out the music. Call SD_MusicPlaying()\r
-// to see if the fadeout is complete\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-void\r
-SD_FadeOutMusic(void)\r
-{\r
- switch (MusicMode)\r
- {\r
- case smm_AdLib:\r
- // DEBUG - quick hack to turn the music off\r
- SD_MusicOff();\r
- break;\r
- }\r
-}\r
-\r
-///////////////////////////////////////////////////////////////////////////\r
-//\r
-// SD_MusicPlaying() - returns true if music is currently playing, false if\r
-// not\r
-//\r
-///////////////////////////////////////////////////////////////////////////\r
-boolean\r
-SD_MusicPlaying(void)\r
-{\r
- boolean result;\r
-\r
- switch (MusicMode)\r
- {\r
- case smm_AdLib:\r
- result = false;\r
- // DEBUG - not written\r
- break;\r
- default:\r
- result = false;\r
- }\r
-\r
- return(result);\r
-}\r
projects / 16.git / blobdiff