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id_sd.cpp
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id_sd.cpp
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//
// ID Engine
// ID_SD.c - Sound Manager for Wolfenstein 3D
// v1.2
// By Jason Blochowiak
//
//
// This module handles dealing with generating sound on the appropriate
// hardware
//
// Depends on: User Mgr (for parm checking)
//
// Globals:
// For User Mgr:
// SoundBlasterPresent - SoundBlaster card present?
// AdLibPresent - AdLib card present?
// SoundMode - What device is used for sound effects
// (Use SM_SetSoundMode() to set)
// MusicMode - What device is used for music
// (Use SM_SetMusicMode() to set)
// DigiMode - What device is used for digitized sound effects
// (Use SM_SetDigiDevice() to set)
//
// For Cache Mgr:
// NeedsDigitized - load digitized sounds?
// NeedsMusic - load music?
//
#include "wl_def.h"
#include <SDL_mixer.h>
#include "fmopl.h"
#define ORIGSAMPLERATE 7042
typedef struct
{
char RIFF[4];
longword filelenminus8;
char WAVE[4];
char fmt_[4];
longword formatlen;
word val0x0001;
word channels;
longword samplerate;
longword bytespersec;
word bytespersample;
word bitspersample;
} headchunk;
typedef struct
{
char chunkid[4];
longword chunklength;
} wavechunk;
typedef struct
{
uint32_t startpage;
uint32_t length;
} digiinfo;
static Mix_Chunk* SoundChunks[STARTMUSIC - STARTDIGISOUNDS];
globalsoundpos channelSoundPos[MIX_CHANNELS];
// Global variables
boolean AdLibPresent,
SoundBlasterPresent, SBProPresent,
SoundPositioned;
SDMode SoundMode;
SMMode MusicMode;
SDSMode DigiMode;
static byte** SoundTable;
int DigiMap[LASTSOUND];
int DigiChannel[STARTMUSIC - STARTDIGISOUNDS];
// Internal variables
static boolean SD_Started;
static boolean nextsoundpos;
static soundnames SoundNumber;
static soundnames DigiNumber;
static word SoundPriority;
static word DigiPriority;
static int LeftPosition;
static int RightPosition;
word NumDigi;
static digiinfo* DigiList;
static boolean DigiPlaying;
// PC Sound variables
static volatile byte pcLastSample;
static byte* volatile pcSound;
static longword pcLengthLeft;
// AdLib variables
static byte* volatile alSound;
static byte alBlock;
static longword alLengthLeft;
static longword alTimeCount;
static Instrument alZeroInst;
// Sequencer variables
static volatile boolean sqActive;
static word* sqHack;
static word* sqHackPtr;
static int sqHackLen;
static int sqHackSeqLen;
static longword sqHackTime;
#ifdef USE_GPL
DBOPL::Chip oplChip;
static inline bool YM3812Init(int numChips, int clock, int rate)
{
oplChip.Setup(rate);
return false;
}
static inline void YM3812Write(DBOPL::Chip& which, Bit32u reg, Bit8u val)
{
which.WriteReg(reg, val);
}
static inline void YM3812UpdateOne(DBOPL::Chip& which, int16_t* stream, int length)
{
Bit32s buffer[512 * 2];
int i;
// length is at maximum samplesPerMusicTick = param_samplerate / 700
// so 512 is sufficient for a sample rate of 358.4 kHz (default 44.1 kHz)
if (length > 512)
length = 512;
if (which.opl3Active)
{
which.GenerateBlock3(length, buffer);
// GenerateBlock3 generates a number of "length" 32-bit stereo samples
// so we only need to convert them to 16-bit samples
for (i = 0; i < length * 2; i++) // * 2 for left/right channel
{
// Multiply by 4 to match loudness of MAME emulator.
Bit32s sample = buffer[i] << 2;
if (sample > 32767) sample = 32767;
else if (sample < -32768) sample = -32768;
stream[i] = sample;
}
}
else
{
which.GenerateBlock2(length, buffer);
// GenerateBlock3 generates a number of "length" 32-bit mono samples
// so we need to convert them to 32-bit stereo samples
for (i = 0; i < length; i++)
{
// Multiply by 4 to match loudness of MAME emulator.
// Then upconvert to stereo.
Bit32s sample = buffer[i] << 2;
if (sample > 32767) sample = 32767;
else if (sample < -32768) sample = -32768;
stream[i * 2] = stream[i * 2 + 1] = (int16_t)sample;
}
}
}
#else
static const int oplChip = 0;
#endif
static void SDL_SoundFinished(void)
{
SoundNumber = (soundnames)0;
SoundPriority = 0;
}
#ifdef NOTYET
void SDL_turnOnPCSpeaker(word timerval);
#pragma aux SDL_turnOnPCSpeaker = \
"mov al,0b6h" \
"out 43h,al" \
"mov al,bl" \
"out 42h,al" \
"mov al,bh" \
"out 42h,al" \
"in al,61h" \
"or al,3" \
"out 61h,al" \
parm [bx] \
modify exact [al]
void SDL_turnOffPCSpeaker();
#pragma aux SDL_turnOffPCSpeaker = \
"in al,61h" \
"and al,0fch" \
"out 61h,al" \
modify exact [al]
void SDL_setPCSpeaker(byte val);
#pragma aux SDL_setPCSpeaker = \
"in al,61h" \
"and al,0fch" \
"or al,ah" \
"out 61h,al" \
parm [ah] \
modify exact [al]
void inline SDL_DoFX()
{
if (pcSound)
{
if (*pcSound != pcLastSample)
{
pcLastSample = *pcSound;
if (pcLastSample)
SDL_turnOnPCSpeaker(pcLastSample * 60);
else
SDL_turnOffPCSpeaker();
}
pcSound++;
pcLengthLeft--;
if (!pcLengthLeft)
{
pcSound = 0;
SoundNumber = (soundnames)0;
SoundPriority = 0;
SDL_turnOffPCSpeaker();
}
}
// [adlib sound stuff removed...]
}
static void SDL_DigitizedDoneInIRQ(void);
void inline SDL_DoFast()
{
count_fx++;
if (count_fx >= 5)
{
count_fx = 0;
SDL_DoFX();
count_time++;
if (count_time >= 2)
{
TimeCount++;
count_time = 0;
}
}
// [adlib music and soundsource stuff removed...]
TimerCount += TimerDivisor;
if (*((word*)&TimerCount + 1))
{
*((word*)&TimerCount + 1) = 0;
t0OldService();
}
else
{
outp(0x20, 0x20);
}
}
// Timer 0 ISR for 7000Hz interrupts
void __interrupt SDL_t0ExtremeAsmService(void)
{
if (pcindicate)
{
if (pcSound)
{
SDL_setPCSpeaker(((*pcSound++) & 0x80) >> 6);
pcLengthLeft--;
if (!pcLengthLeft)
{
pcSound = 0;
SDL_turnOffPCSpeaker();
SDL_DigitizedDoneInIRQ();
}
}
}
extreme++;
if (extreme >= 10)
{
extreme = 0;
SDL_DoFast();
}
else
outp(0x20, 0x20);
}
// Timer 0 ISR for 700Hz interrupts
void __interrupt SDL_t0FastAsmService(void)
{
SDL_DoFast();
}
// Timer 0 ISR for 140Hz interrupts
void __interrupt SDL_t0SlowAsmService(void)
{
count_time++;
if (count_time >= 2)
{
TimeCount++;
count_time = 0;
}
SDL_DoFX();
TimerCount += TimerDivisor;
if (*((word*)&TimerCount + 1))
{
*((word*)&TimerCount + 1) = 0;
t0OldService();
}
else
outp(0x20, 0x20);
}
void SDL_IndicatePC(boolean ind)
{
pcindicate = ind;
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_SetTimer0() - Sets system timer 0 to the specified speed
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_SetTimer0(word speed)
{
#ifndef TPROF // If using Borland's profiling, don't screw with the timer
// _asm pushfd
_asm cli
outp(0x43, 0x36); // Change timer 0
outp(0x40, (byte)speed);
outp(0x40, speed >> 8);
// Kludge to handle special case for digitized PC sounds
if (TimerDivisor == (1192030 / (TickBase * 100)))
TimerDivisor = (1192030 / (TickBase * 10));
else
TimerDivisor = speed;
// _asm popfd
_asm sti
#else
TimerDivisor = 0x10000;
#endif
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_SetIntsPerSec() - Uses SDL_SetTimer0() to set the number of
// interrupts generated by system timer 0 per second
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_SetIntsPerSec(word ints)
{
TimerRate = ints;
SDL_SetTimer0(1192030 / ints);
}
static void
SDL_SetTimerSpeed(void)
{
word rate;
void (_interrupt * isr)(void);
if ((DigiMode == sds_PC) && DigiPlaying)
{
rate = TickBase * 100;
isr = SDL_t0ExtremeAsmService;
}
else if ((MusicMode == smm_AdLib) || ((DigiMode == sds_SoundSource) && DigiPlaying))
{
rate = TickBase * 10;
isr = SDL_t0FastAsmService;
}
else
{
rate = TickBase * 2;
isr = SDL_t0SlowAsmService;
}
if (rate != TimerRate)
{
_dos_setvect(8, isr);
SDL_SetIntsPerSec(rate);
TimerRate = rate;
}
}
//
// PC Sound code
//
///////////////////////////////////////////////////////////////////////////
//
// SDL_PCPlaySample() - Plays the specified sample on the PC speaker
//
///////////////////////////////////////////////////////////////////////////
#ifdef _MUSE_
void
#else
static void
#endif
SDL_PCPlaySample(byte* data, longword len, boolean inIRQ)
{
if (!inIRQ)
{
// _asm pushfd
_asm cli
}
SDL_IndicatePC(true);
pcLengthLeft = len;
pcSound = (volatile byte*)data;
if (!inIRQ)
{
// _asm popfd
_asm sti
}
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_PCStopSample() - Stops a sample playing on the PC speaker
//
///////////////////////////////////////////////////////////////////////////
#ifdef _MUSE_
void
#else
static void
#endif
SDL_PCStopSampleInIRQ(void)
{
pcSound = 0;
SDL_IndicatePC(false);
_asm in al, 0x61 // Turn the speaker off
_asm and al, 0xfd // ~2
_asm out 0x61, al
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_PCPlaySound() - Plays the specified sound on the PC speaker
//
///////////////////////////////////////////////////////////////////////////
#ifdef _MUSE_
void
#else
static void
#endif
SDL_PCPlaySound(PCSound* sound)
{
// _asm pushfd
_asm cli
pcLastSample = -1;
pcLengthLeft = sound->common.length;
pcSound = sound->data;
// _asm popfd
_asm sti
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_PCStopSound() - Stops the current sound playing on the PC Speaker
//
///////////////////////////////////////////////////////////////////////////
#ifdef _MUSE_
void
#else
static void
#endif
SDL_PCStopSound(void)
{
// _asm pushfd
_asm cli
pcSound = 0;
_asm in al, 0x61 // Turn the speaker off
_asm and al, 0xfd // ~2
_asm out 0x61, al
// _asm popfd
_asm sti
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_ShutPC() - Turns off the pc speaker
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_ShutPC(void)
{
// _asm pushfd
_asm cli
pcSound = 0;
_asm in al, 0x61 // Turn the speaker & gate off
_asm and al, 0xfc // ~3
_asm out 0x61, al
// _asm popfd
_asm sti
}
#endif
void
SD_StopDigitized(void)
{
DigiPlaying = false;
DigiNumber = (soundnames)0;
DigiPriority = 0;
SoundPositioned = false;
if ((DigiMode == sds_PC) && (SoundMode == sdm_PC))
SDL_SoundFinished();
switch (DigiMode)
{
case sds_PC:
// SDL_PCStopSampleInIRQ();
break;
case sds_SoundBlaster:
// SDL_SBStopSampleInIRQ();
Mix_HaltChannel(-1);
break;
}
}
int SD_GetChannelForDigi(int which)
{
if (DigiChannel[which] != -1) return DigiChannel[which];
int channel = Mix_GroupAvailable(1);
if (channel == -1) channel = Mix_GroupOldest(1);
if (channel == -1) // All sounds stopped in the meantime?
return Mix_GroupAvailable(1);
return channel;
}
void SD_SetPosition(int channel, int leftpos, int rightpos)
{
if ((leftpos < 0) || (leftpos > 15) || (rightpos < 0) || (rightpos > 15)
|| ((leftpos == 15) && (rightpos == 15)))
Quit("SD_SetPosition: Illegal position");
switch (DigiMode)
{
case sds_SoundBlaster:
// SDL_PositionSBP(leftpos,rightpos);
Mix_SetPanning(channel, ((15 - leftpos) << 4) + 15,
((15 - rightpos) << 4) + 15);
break;
}
}
Sint16 GetSample(float csample, byte* samples, int size)
{
float s0 = 0, s1 = 0, s2 = 0;
int cursample = (int)csample;
float sf = csample - (float)cursample;
if (cursample - 1 >= 0) s0 = (float)(samples[cursample - 1] - 128);
s1 = (float)(samples[cursample] - 128);
if (cursample + 1 < size) s2 = (float)(samples[cursample + 1] - 128);
float val = s0 * sf * (sf - 1) / 2 - s1 * (sf * sf - 1) + s2 * (sf + 1) * sf / 2;
int32_t intval = (int32_t)(val * 256);
if (intval < -32768) intval = -32768;
else if (intval > 32767) intval = 32767;
return (Sint16)intval;
}
void SD_PrepareSound(int which)
{
if (DigiList == NULL)
Quit("SD_PrepareSound(%i): DigiList not initialized!\n", which);
int page = DigiList[which].startpage;
int size = DigiList[which].length;
byte* origsamples = PM_GetSound(page);
if (origsamples + size >= PM_GetEnd())
Quit("SD_PrepareSound(%i): Sound reaches out of page file!\n", which);
int destsamples = (int)((float)size * (float)param_samplerate
/ (float)ORIGSAMPLERATE);
byte* wavebuffer = (byte*)malloc(sizeof(headchunk) + sizeof(wavechunk)
+ destsamples * 2); // dest are 16-bit samples
if (wavebuffer == NULL)
Quit("Unable to allocate wave buffer for sound %i!\n", which);
headchunk head = { {'R','I','F','F'}, 0, {'W','A','V','E'},
{'f','m','t',' '}, 0x10, 0x0001, 1, (longword)param_samplerate, (longword)(param_samplerate * 2), 2, 16 };
wavechunk dhead = { {'d', 'a', 't', 'a'}, (longword)(destsamples * 2) };
head.filelenminus8 = sizeof(head) + destsamples * 2; // (sizeof(dhead)-8 = 0)
memcpy(wavebuffer, &head, sizeof(head));
memcpy(wavebuffer + sizeof(head), &dhead, sizeof(dhead));
// alignment is correct, as wavebuffer comes from malloc
// and sizeof(headchunk) % 4 == 0 and sizeof(wavechunk) % 4 == 0
Sint16* newsamples = (Sint16*)(void*)(wavebuffer + sizeof(headchunk)
+ sizeof(wavechunk));
float cursample = 0.F;
float samplestep = (float)ORIGSAMPLERATE / (float)param_samplerate;
for (int i = 0; i < destsamples; i++, cursample += samplestep)
{
newsamples[i] = GetSample((float)size * (float)i / (float)destsamples,
origsamples, size);
}
SoundChunks[which] = Mix_LoadWAV_RW(SDL_RWFromMem(wavebuffer,
sizeof(headchunk) + sizeof(wavechunk) + destsamples * 2), 1);
free(wavebuffer);
}
int SD_PlayDigitized(word which, int leftpos, int rightpos)
{
if (!DigiMode)
return 0;
if (which >= NumDigi)
Quit("SD_PlayDigitized: bad sound number %i", which);
int channel = SD_GetChannelForDigi(which);
SD_SetPosition(channel, leftpos, rightpos);
DigiPlaying = true;
Mix_Chunk* sample = SoundChunks[which];
if (sample == NULL)
{
printf("SoundChunks[%i] is NULL!\n", which);
return 0;
}
if (Mix_PlayChannel(channel, sample, 0) == -1)
{
printf("Unable to play sound: %s\n", Mix_GetError());
return 0;
}
return channel;
}
void SD_ChannelFinished(int channel)
{
channelSoundPos[channel].valid = 0;
}
void
SD_SetDigiDevice(SDSMode mode)
{
boolean devicenotpresent;
if (mode == DigiMode)
return;
SD_StopDigitized();
devicenotpresent = false;
switch (mode)
{
case sds_SoundBlaster:
if (!SoundBlasterPresent)
devicenotpresent = true;
break;
}
if (!devicenotpresent)
{
DigiMode = mode;
#ifdef NOTYET
SDL_SetTimerSpeed();
#endif
}
}
void
SDL_SetupDigi(void)
{
// Correct padding enforced by PM_Startup()
word* soundInfoPage = (word*)(void*)PM_GetPage(ChunksInFile - 1);
NumDigi = (word)PM_GetPageSize(ChunksInFile - 1) / 4;
DigiList = (digiinfo*)malloc(NumDigi * sizeof(digiinfo));
int i;
for (i = 0; i < NumDigi; i++)
{
// Calculate the size of the digi from the sizes of the pages between
// the start page and the start page of the next sound
DigiList[i].startpage = soundInfoPage[i * 2];
if ((int)DigiList[i].startpage >= ChunksInFile - 1)
{
NumDigi = i;
break;
}
int lastPage;
if (i < NumDigi - 1)
{
lastPage = soundInfoPage[i * 2 + 2];
if (lastPage == 0 || lastPage + PMSoundStart > ChunksInFile - 1) lastPage = ChunksInFile - 1;
else lastPage += PMSoundStart;
}
else lastPage = ChunksInFile - 1;
int size = 0;
for (int page = PMSoundStart + DigiList[i].startpage; page < lastPage; page++)
size += PM_GetPageSize(page);
// Don't include padding of sound info page, if padding was added
if (lastPage == ChunksInFile - 1 && PMSoundInfoPagePadded) size--;
// Patch lower 16-bit of size with size from sound info page.
// The original VSWAP contains padding which is included in the page size,
// but not included in the 16-bit size. So we use the more precise value.
if ((size & 0xffff0000) != 0 && (size & 0xffff) < soundInfoPage[i * 2 + 1])
size -= 0x10000;
size = (size & 0xffff0000) | soundInfoPage[i * 2 + 1];
DigiList[i].length = size;
}
for (i = 0; i < LASTSOUND; i++)
{
DigiMap[i] = -1;
DigiChannel[i] = -1;
}
}
// AdLib Code
///////////////////////////////////////////////////////////////////////////
//
// SDL_ALStopSound() - Turns off any sound effects playing through the
// AdLib card
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_ALStopSound(void)
{
alSound = 0;
alOut(alFreqH + 0, 0);
}
static void
SDL_AlSetFXInst(Instrument* inst)
{
byte c, m;
m = 0; // modulator cell for channel 0
c = 3; // carrier cell for channel 0
alOut(m + alChar, inst->mChar);
alOut(m + alScale, inst->mScale);
alOut(m + alAttack, inst->mAttack);
alOut(m + alSus, inst->mSus);
alOut(m + alWave, inst->mWave);
alOut(c + alChar, inst->cChar);
alOut(c + alScale, inst->cScale);
alOut(c + alAttack, inst->cAttack);
alOut(c + alSus, inst->cSus);
alOut(c + alWave, inst->cWave);
// Note: Switch commenting on these lines for old MUSE compatibility
// alOutInIRQ(alFeedCon,inst->nConn);
alOut(alFeedCon, 0);
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_ALPlaySound() - Plays the specified sound on the AdLib card
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_ALPlaySound(AdLibSound* sound)
{
Instrument* inst;
byte* data;
SDL_ALStopSound();
alLengthLeft = sound->common.length;
data = sound->data;
alBlock = ((sound->block & 7) << 2) | 0x20;
inst = &sound->inst;
if (!(inst->mSus | inst->cSus))
{
Quit("SDL_ALPlaySound() - Bad instrument");
}
SDL_AlSetFXInst(inst);
alSound = (byte*)data;
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_ShutAL() - Shuts down the AdLib card for sound effects
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_ShutAL(void)
{
alSound = 0;
alOut(alEffects, 0);
alOut(alFreqH + 0, 0);
SDL_AlSetFXInst(&alZeroInst);
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_CleanAL() - Totally shuts down the AdLib card
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_CleanAL(void)
{
int i;
alOut(alEffects, 0);
for (i = 1; i < 0xf5; i++)
alOut(i, 0);
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_StartAL() - Starts up the AdLib card for sound effects
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_StartAL(void)
{
alOut(alEffects, 0);
SDL_AlSetFXInst(&alZeroInst);
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_DetectAdLib() - Determines if there's an AdLib (or SoundBlaster
// emulating an AdLib) present
//
///////////////////////////////////////////////////////////////////////////
static boolean
SDL_DetectAdLib(void)
{
for (int i = 1; i <= 0xf5; i++) // Zero all the registers
alOut(i, 0);
alOut(1, 0x20); // Set WSE=1
// alOut(8, 0); // Set CSM=0 & SEL=0
return true;
}
////////////////////////////////////////////////////////////////////////////
//
// SDL_ShutDevice() - turns off whatever device was being used for sound fx
//
////////////////////////////////////////////////////////////////////////////
static void
SDL_ShutDevice(void)
{
switch (SoundMode)
{
case sdm_PC:
// SDL_ShutPC();
break;
case sdm_AdLib:
SDL_ShutAL();
break;
}
SoundMode = sdm_Off;
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_CleanDevice() - totally shuts down all sound devices
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_CleanDevice(void)
{
if ((SoundMode == sdm_AdLib) || (MusicMode == smm_AdLib))
SDL_CleanAL();
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_StartDevice() - turns on whatever device is to be used for sound fx
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_StartDevice(void)
{
switch (SoundMode)
{
case sdm_AdLib:
SDL_StartAL();
break;
}
SoundNumber = (soundnames)0;
SoundPriority = 0;
}
// Public routines
///////////////////////////////////////////////////////////////////////////
//
// SD_SetSoundMode() - Sets which sound hardware to use for sound effects
//
///////////////////////////////////////////////////////////////////////////
boolean
SD_SetSoundMode(SDMode mode)
{
boolean result = false;
word tableoffset;
SD_StopSound();
if ((mode == sdm_AdLib) && !AdLibPresent)
mode = sdm_PC;
switch (mode)
{
case sdm_Off:
tableoffset = STARTADLIBSOUNDS;
result = true;
break;
case sdm_PC:
tableoffset = STARTPCSOUNDS;
result = true;
break;
case sdm_AdLib:
tableoffset = STARTADLIBSOUNDS;
if (AdLibPresent)
result = true;
break;
default:
Quit("SD_SetSoundMode: Invalid sound mode %i", mode);
return false;
}
SoundTable = &audiosegs[tableoffset];
if (result && (mode != SoundMode))
{
SDL_ShutDevice();
SoundMode = mode;
SDL_StartDevice();
}
return(result);
}
///////////////////////////////////////////////////////////////////////////
//
// SD_SetMusicMode() - sets the device to use for background music
//
///////////////////////////////////////////////////////////////////////////
boolean
SD_SetMusicMode(SMMode mode)
{
boolean result = false;
SD_FadeOutMusic();
while (SD_MusicPlaying())
SDL_Delay(5);
switch (mode)
{
case smm_Off:
result = true;
break;