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beebsound.cc
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/****************************************************************************/
/* Beebem - (c) David Alan Gilbert 1994/1995 */
/* ----------------------------------------- */
/* This program may be distributed freely within the following restrictions:*/
/* */
/* 1) You may not charge for this program or for any part of it. */
/* 2) This copyright message must be distributed with all copies. */
/* 3) This program must be distributed complete with source code. Binary */
/* only distribution is not permitted. */
/* 4) The author offers no warrenties, or guarentees etc. - you use it at */
/* your own risk. If it messes something up or destroys your computer */
/* thats YOUR problem. */
/* 5) You may use small sections of code from this program in your own */
/* applications - but you must acknowledge its use. If you plan to use */
/* large sections then please ask the author. */
/* */
/* If you do not agree with any of the above then please do not use this */
/* program. */
/* Please report any problems to the author at beebem@treblig.org */
/****************************************************************************/
/* Win32 port - Mike Wyatt 7/6/97 */
/* Conveted Win32 port to use DirectSound - Mike Wyatt 11/1/98 */
// 14/04/01 - Proved that I AM better than DirectSound, by fixing the code thereof ;P
#if HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef SOUNDSUPPORT
#include "beebsound.h"
#include <iostream>
#include <fstream>
//==#include "windows.h"
//-- #include <process.h>
#include <math.h>
#include <errno.h>
//-- #include <windowsx.h>
//-- #include <mmsystem.h>
//-- #include <dsound.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "6502core.h"
#include "port.h"
#include "beebmem.h"
#include "beebwin.h"
#include "uefstate.h"
//==#include "avi.h"
#include "main.h"
//==#include "speech.h"
//-- extern AVIWriter *aviWriter;
//#define DEBUGSOUNDTOFILE
//#define PREFSAMPLERATE 11025
//#define PREFSAMPLERATE 22050
#define PREFSAMPLERATE 44100
#define MAXBUFSIZE 32768
static unsigned char SoundBuf[MAXBUFSIZE];
static unsigned char RelayOnBuf[2048];
static unsigned char RelayOffBuf[2048];
unsigned char SpeechBuf[MAXBUFSIZE];
//-- static unsigned char *PROnBuf=RelayOnBuf;
//-- static unsigned char *PROffBuf=RelayOffBuf;
//-- static LPDIRECTSOUND DSound = NULL;
//-- static LPDIRECTSOUNDBUFFER DSB1 = NULL;
int UsePrimaryBuffer=0;
int SoundEnabled = 1;
int DirectSoundEnabled = 0;
int RelaySoundEnabled = 0;
int SoundChipEnabled = 1;
int SoundSampleRate = PREFSAMPLERATE;
int SoundVolume = 3;
int SoundAutoTriggerTime;
int SoundBufferSize,TSoundBufferSize;
double CSC[4]={0,0,0,0},CSA[4]={0,0,0,0}; // ChangeSamps Adjusts
char SoundExponentialVolume = 1;
/* Number of places to shift the volume */
#define VOLMAG 3
#define WRITE_ADJUST ((samplerate/50)*2)
static int RelayLen[3]={0,398,297}; // Relay samples
int UseHostClock=0;
int Speech[3];
FILE *sndlog=NULL;
//->volatile struct {
//++
volatile struct BeebState {
//<-
unsigned int ToneFreq[4];
unsigned int ChangeSamps[4]; /* How often this channel should flip its otuput */
unsigned int ToneVolume[4]; /* In units of /dev/dsp */
struct {
unsigned int FB:1; /* =0 for periodic, =1 for white */
unsigned int Freq:2; /* 0=low, 1=medium, 2=high, 3=tone gen 1 freq */
unsigned int Vol:4;
} Noise;
int LastToneFreqSet; /* the tone generator last set - for writing the 2nd byte */
} BeebState76489;
int RealVolumes[4]; // Holds the real volume values for state save use
bool ReloadingChip;
static int ActiveChannel[4]={FALSE,FALSE,FALSE,FALSE}; /* Those channels with non-0 voolume */
// Set it to an array for more accurate sound generation
//-- static int devfd; /* Audio device id */
static unsigned int samplerate;
static double OurTime=0.0; /* Time in sample periods */
long long SoundTrigger; /* Time to trigger a sound event */
long long SoundTrigger2,STCycles; // BBC's Clock count for triggering host clock adjust
int ASoundTrigger; // CPU cycle equivalent to trigger recalculation;
static unsigned int GenIndex[4]; /* Used by the voice generators */
static int GenState[4];
static int bufptr=0;
int SoundDefault;
double SoundTuning=0.0; // Tunning offset
void PlayUpTil(double DestTime);
int GetVol(int vol);
BOOL bReRead=FALSE;
volatile BOOL bDoSound=TRUE;
int WriteOffset=0; int SampleAdjust=0;
char Relay=0; int RelayPos=0;
long long PFreq,LastPCount,CurrentPCount;
long long SoundCycles=0; double CycleRatio;
struct AudioType TapeAudio; // Tape audio decoder stuff
bool TapeSoundEnabled;
int PartSamples=1;
int SBSize=1;
int XtraCycles=0; // Cycles to fill in the gap from the timer.
int LastXtraCycles=0; // position in which XtraCycles ranges from
bool Playing;
/****************************************************************************/
/* Writes sound data to a DirectSound buffer */
//==HRESULT WriteToSoundBuffer(PBYTE lpbSoundData)
//=={
//-- LPVOID lpvPtr1;
//-- DWORD dwBytes1;
//-- LPVOID lpvPtr2;
//-- DWORD dwBytes2;
//-- DWORD CWC;
//-- HRESULT hr;
//-- int CDiff;
//-- if ((DSound==NULL) || (DSB1==NULL)) return DS_OK; // Don't write if DirectSound not up and running!
//-- // (As when in menu loop)
//-- // Correct from pointer desync
//-- if (!Playing) {
//-- bReRead=FALSE;
//-- // Blank off the buffer
//-- hr = DSB1->Lock(0, 0, &lpvPtr1,
//-- &dwBytes1, &lpvPtr2, &dwBytes2, DSBLOCK_ENTIREBUFFER);
//-- if(hr == DSERR_BUFFERLOST)
//-- {
//-- hr = DSB1->Restore();
//-- if (hr == DS_OK)
//-- hr = DSB1->Lock(0, 0,
//-- &lpvPtr1, &dwBytes1, &lpvPtr2, &dwBytes2, DSBLOCK_ENTIREBUFFER);
//-- }
//-- if (lpvPtr1!=NULL) memset(lpvPtr1,128,dwBytes1);
//-- if (lpvPtr2!=NULL) memset(lpvPtr2,128,dwBytes2);
//-- DSB1->Unlock(lpvPtr1, dwBytes1, lpvPtr2, dwBytes2);
//-- // Set our pointer to the beginning
//-- WriteOffset=0;
//-- }
//--
//-- if (bReRead) {
//-- DSB1->GetCurrentPosition(NULL,&CWC);
//-- WriteOffset=CWC+WRITE_ADJUST;
//-- if (WriteOffset>=TSoundBufferSize) WriteOffset-=TSoundBufferSize;
//-- bReRead=FALSE;
//-- }
//-- // Obtain write pointer.
//-- hr = DSB1->Lock(WriteOffset, SoundBufferSize, &lpvPtr1,
//-- &dwBytes1, &lpvPtr2, &dwBytes2, 0);
//-- if(hr == DSERR_BUFFERLOST)
//-- {
//-- hr = DSB1->Restore();
//-- if (hr == DS_OK)
//-- hr = DSB1->Lock(WriteOffset, SoundBufferSize,
//-- &lpvPtr1, &dwBytes1, &lpvPtr2, &dwBytes2, 0);
//-- }
//-- if(DS_OK == hr)
//-- {
//-- // Write to pointers.
//-- CopyMemory(lpvPtr1,lpbSoundData,dwBytes1);
//-- if(NULL != lpvPtr2)
//-- {
//-- CopyMemory(lpvPtr2, lpbSoundData+dwBytes1, dwBytes2);
//-- }
//-- // Release the data back to DirectSound.
//-- hr = DSB1->Unlock(lpvPtr1, dwBytes1, lpvPtr2, dwBytes2);
//-- }
//-- // Update pointers
//-- WriteOffset+=SoundBufferSize;
//-- if (WriteOffset>=TSoundBufferSize) WriteOffset-=TSoundBufferSize;
//-- // Check for pointer desync
//-- DSB1->GetCurrentPosition(NULL,&CWC);
//-- CDiff=WriteOffset-CWC;
//-- if (CDiff<0) CDiff=(WriteOffset+TSoundBufferSize)-CWC;
//-- if (abs(CDiff)>(signed)(WRITE_ADJUST*2)) bReRead=TRUE;
//-- SampleAdjust--;
//-- if (SampleAdjust==0) {
//-- SampleAdjust=2;
//-- SoundBufferSize=(SBSize)?444:220; // 110
//-- } else SoundBufferSize=(SBSize)?440:221; // 111
//-- if (!Playing) {
//-- DSB1->SetCurrentPosition(SoundBufferSize+1);
//-- hr=DSB1->Play(0,0,DSBPLAY_LOOPING);
//-- Playing=TRUE;
//-- bReRead=TRUE;
//-- }
//--
//-- if (Playing && aviWriter)
//-- {
//-- HRESULT hr = aviWriter->WriteSound(lpbSoundData, SoundBufferSize);
//-- if (hr != E_UNEXPECTED && FAILED(hr))
//-- {
//-- MessageBox(GETHWND, "Failed to write sound to AVI file",
//-- "BeebEm", MB_OK|MB_ICONERROR);
//-- delete aviWriter;
//-- aviWriter = NULL;
//-- }
//-- }
//--
//-- return hr;
//== return(0);
//==}
float bitpart(float wholepart) {
// return the decimal part of a sample calculation
return (wholepart-(int)wholepart);
}
void MuteSound(void) {
//-- if (Playing) DSB1->Stop();
Playing=FALSE;
}
/****************************************************************************/
/* DestTime is in samples */
void PlayUpTil(double DestTime) {
int tmptotal,channel,bufinc,tapetotal;
char Extras;
int SpeechPtr = 0;
//== if (MachineType != 3 && SpeechEnabled)
//== {
//== SpeechPtr = 0;
//== memset(SpeechBuf, 128, sizeof(SpeechBuf));
//== int len = (int) (DestTime - OurTime + 1);
//== if (len > MAXBUFSIZE)
//== len = MAXBUFSIZE;
//== tms5220_update(SpeechBuf, len);
//== }
// printf("%f %f %f\n", (float) DestTime, (float) OurTime, (float) DestTime - OurTime );
if ( (DestTime-OurTime) > 1000.0 ) {
OurTime = DestTime;
bufptr=0;
bufinc=0;
return;
}
while (DestTime>OurTime) {
for(bufinc=0;(bufptr<SoundBufferSize) && ((OurTime+bufinc)<DestTime);bufptr++,bufinc++) {
int tt;
tmptotal=0;
Extras=4;
if (SoundChipEnabled) {
// Begin of for loop
for(channel=1;channel<=3;channel++) {
if (ActiveChannel[channel]) {
if ((GenState[channel]) && (!Speech[channel]))
tmptotal+=BeebState76489.ToneVolume[channel];
if ((!GenState[channel]) && (!Speech[channel]))
tmptotal-=BeebState76489.ToneVolume[channel];
if (Speech[channel])
tmptotal+=(BeebState76489.ToneVolume[channel]-GetVol(7));
GenIndex[channel]++;
tt=(int)CSC[channel];
if (!PartSamples) tt=0;
if (GenIndex[channel]>=(BeebState76489.ChangeSamps[channel]+tt)) {
if (CSC[channel] >= 1.0)
CSC[channel]-=1.0;
CSC[channel]+=CSA[channel];
GenIndex[channel]=0;
GenState[channel]^=1;
}
}
} /* Channel loop */
/* Now put in noise generator stuff */
if (ActiveChannel[0]) {
if (BeebState76489.Noise.FB) {
/* White noise */
if (GenState[0])
tmptotal+=BeebState76489.ToneVolume[0];
else
tmptotal-=BeebState76489.ToneVolume[0];
GenIndex[0]++;
switch (BeebState76489.Noise.Freq) {
case 0: /* Low */
if (GenIndex[0]>=(samplerate/10000)) {
GenIndex[0]=0;
GenState[0]=rand() & 1;
}
break;
case 1: /* Med */
if (GenIndex[0]>=(samplerate/5000)) {
GenIndex[0]=0;
GenState[0]=rand() & 1;
}
break;
case 2: /* High */
if (GenIndex[0]>=(samplerate/2500)) {
GenIndex[0]=0;
GenState[0]=rand() & 1;
}
break;
case 3: /* as channel 1 */
if (GenIndex[0]>=BeebState76489.ChangeSamps[1]) {
GenIndex[0]=0;
GenState[0]=rand() & 1;
}
break;
} /* Freq type switch */
} else {
/* Periodic */
if (GenState[0])
tmptotal+=BeebState76489.ToneVolume[0];
else
tmptotal-=BeebState76489.ToneVolume[0];
GenIndex[0]++;
switch (BeebState76489.Noise.Freq) {
case 2: /* Low */
if (GenState[0]) {
if (GenIndex[0]>=(samplerate/125)) {
GenIndex[0]=0;
GenState[0]=0;
}
} else {
if (GenIndex[0]>=(samplerate/1250)) {
GenIndex[0]=0;
GenState[0]=1;
}
}
break;
case 1: /* Med */
if (GenState[0]) {
if (GenIndex[0]>=(samplerate/250)) {
GenIndex[0]=0;
GenState[0]=0;
}
} else {
if (GenIndex[0]>=(samplerate/2500)) {
GenIndex[0]=0;
GenState[0]=1;
}
}
break;
case 0: /* High */
if (GenState[0]) {
if (GenIndex[0]>=(samplerate/500)) {
GenIndex[0]=0;
GenState[0]=0;
}
} else {
if (GenIndex[0]>=(samplerate/5000)) {
GenIndex[0]=0;
GenState[0]=1;
}
}
break;
case 3: /* Tone gen 1 */
// if (GenState[0]) {
// if (GenIndex[0]>=((BeebState76489.ChangeSamps[1]+(int)CSC[1])*31)) {
// GenIndex[0]=0;
// GenState[0]=0;
// }
// } else {
// if (GenIndex[0]>=((BeebState76489.ChangeSamps[1]+(int)CSC[1]))) {
// GenIndex[0]=0;
// GenState[0]=1;
// }
tt=(int)CSC[0];
if (GenIndex[0]>=(BeebState76489.ChangeSamps[1]+tt)) {
static int per=0;
CSC[0]+=CSA[1]-tt;
GenIndex[0]=0;
GenState[0]=(per==0);
if (++per==30) {
per=0;
}
}
break;
} /* Freq type switch */
}
}
}
//== // Mix in speech sound
//== if (SpeechEnabled) if (MachineType != 3) tmptotal += (SpeechBuf[SpeechPtr++]-128)*10;
//==
//== // Mix in relay sound here
if (Relay==1) tmptotal+=(RelayOffBuf[RelayPos++]-127)*10;
if (Relay==2) tmptotal+=(RelayOnBuf[RelayPos++]-127)*10;
//== if (TapeSoundEnabled) {
//== // Mix in tape sound here
//== tapetotal=0;
//== if ((TapeAudio.Enabled) && (TapeAudio.Signal==2)) {
//== if (TapeAudio.Samples++>=36) TapeAudio.Samples=0;
//== tapetotal=(int)(sin(((TapeAudio.Samples*20)*3.14)/180)*80);
//== Extras++;
//== }
//== if ((TapeAudio.Enabled) && (TapeAudio.Signal==1)) {
//== tapetotal=(int)(sin(((TapeAudio.Samples*(10*(1+TapeAudio.CurrentBit)))*3.14)/180)*(80+(40*(1-TapeAudio.CurrentBit))));
//== // And if you can follow that equation, "ill give you the money meself" - Richard Gellman
//== if (TapeAudio.Samples++>=36) {
//== TapeAudio.Samples=0;
//== TapeAudio.BytePos++;
//== if (TapeAudio.BytePos<=10) TapeAudio.CurrentBit=(TapeAudio.Data & (1<<(10-TapeAudio.BytePos)))?1:0;
//== }
//== if (TapeAudio.BytePos>10) {
//== TapeAudio.ByteCount--;
//== if (!TapeAudio.ByteCount) TapeAudio.Signal=2; else { TapeAudio.BytePos=1; TapeAudio.CurrentBit=0; }
//== }
//== Extras++;
//== }
//== tmptotal+=tapetotal;
//== }
/* Make it a bit louder under Windows */
if (Relay) Extras++;
if (TapeAudio.Enabled) Extras++;
if (Extras) tmptotal/=4; else tmptotal=0;
// SoundBuf[bufptr] = (tmptotal/SoundVolume)+128;
// SoundBuf[bufptr] = (tmptotal/15); //^0xff;
// SoundBuf[bufptr] = (tmptotal/SoundVolume)+128;
/* For me at least, sound seems to be FUCKED on the GP2x (just like everything else)...
* (Why didn't I buy a DS?)
*/
#ifdef GP2X
SoundBuf[bufptr] = (tmptotal);
#else
SoundBuf[bufptr] = (tmptotal/2)+128;
#endif
// end of for loop
//-> if (RelayPos>=RelayLen[Relay]) Relay=0;
//++
if (RelayPos>=RelayLen[ (int) Relay]) Relay=0;
//<-
} /* buffer loop */
/* Only write data when buffer is full */
if (bufptr == SoundBufferSize)
{
#ifdef DEBUGSOUNDTOFILE
FILE *fd = fopen("/tmp/audio.dbg", "a+b");
if (fd != NULL)
{
fwrite(SoundBuf, 1, SoundBufferSize, fd);
fclose(fd);
}
else
{
MessageBox(GETHWND,"Failed to open audio.dbg","BBC Emulator",MB_OK|MB_ICONERROR);
exit(1);
}
#else
//if (sndlog!=NULL)
//fprintf(sndlog,"Sound write at %lf Samples\n",DestTime);
//fwrite(SoundBuf,1,SoundBufferSize,sndlog);
//-> HRESULT hr;
//-- hr = WriteToSoundBuffer(SoundBuf);
//++
AddBytesToSDLSoundBuffer(SoundBuf, SoundBufferSize);
//<-
#endif
// buffer swapping no longer needed
bufptr=0;
}
OurTime+=bufinc;
} /* While time */
}; /* PlayUpTil */
/****************************************************************************/
/* Convert time in cycles to time in samples */
static long long LastBeebCycle=0; /* Last parameter to this function */
static double LastOurTime=0; /* Last result of this function */
static double CyclesToSamples(long long beebtime) {
double tmp;
/* OK - beeb cycles are in 2MHz units, ours are in 1/samplerate */
/* This is all done incrementally - find the number of ticks since the last call
in both domains. This does mean this should only be called once */
/* Extract number of cycles since last call */
if (beebtime<LastBeebCycle) {
/* Wrap around in beebs time */
tmp=((double)CycleCountWrap-(double)LastBeebCycle)+(double)beebtime;
} else {
tmp=(double)beebtime-(double)LastBeebCycle;
};
//== [HERE] This should be OK as m_RealTimeTarget = 1.0.
//== tmp/=(mainWin->m_RealTimeTarget)?mainWin->m_RealTimeTarget:1;
tmp/=1.0;
/*fprintf(stderr,"Convert tmp=%f\n",tmp); */
LastBeebCycle=beebtime;
tmp*=(samplerate);
tmp/=2000000.0; /* Few - glad thats a double! */
LastOurTime+=tmp;
return LastOurTime;
}; /* CyclesToSamples */
/****************************************************************************/
static void PlayTilNow(void) {
double nowsamps;
XtraCycles=TotalCycles-LastXtraCycles;
nowsamps=CyclesToSamples(SoundCycles);
LastXtraCycles=TotalCycles;
PlayUpTil(nowsamps);
}; /* PlayTilNow */
/****************************************************************************/
/* Creates a DirectSound buffer */
//==HRESULT CreateSecondarySoundBuffer(void)
//=={
//-- WAVEFORMATEX wf;
//-- DSBUFFERDESC dsbdesc;
//-- HRESULT hr;
//--
//-- // Set up wave format structure.
//-- memset(&wf, 0, sizeof(WAVEFORMATEX));
//-- wf.wFormatTag = WAVE_FORMAT_PCM;
//-- wf.nChannels = 1;
//-- wf.nSamplesPerSec = samplerate;
//-- wf.wBitsPerSample = 8;
//-- wf.nBlockAlign = 1;
//-- wf.nAvgBytesPerSec = samplerate;
//-- wf.cbSize = 0;
//--
//-- // Set up DSBUFFERDESC structure.
//-- memset(&dsbdesc, 0, sizeof(DSBUFFERDESC)); // Zero it out.
//-- dsbdesc.dwSize = sizeof(DSBUFFERDESC);
//--
//-- // Need default controls (pan, volume, frequency).
//-- dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2; // | DSBCAPS_STICKYFOCUS;
//-- dsbdesc.dwBufferBytes = 32768;
//-- TSoundBufferSize=32768;
//-- dsbdesc.lpwfxFormat = (LPWAVEFORMATEX)&wf;
//--
//-- // Create buffer.
//-- hr = DSound->CreateSoundBuffer(&dsbdesc, &DSB1, NULL);
//--
//-- return hr;
//== return(0);
//==}
//==HRESULT CreatePrimarySoundBuffer(void)
//=={
//-- WAVEFORMATEX wf;
//-- DSBUFFERDESC dsbdesc;
//-- HRESULT hr;
//-- DSBCAPS dsbcaps;
//--
//-- // Set up wave format structure.
//-- memset(&wf, 0, sizeof(WAVEFORMATEX));
//-- wf.wFormatTag = WAVE_FORMAT_PCM;
//-- wf.nChannels = 1;
//-- wf.nSamplesPerSec = samplerate;
//-- wf.wBitsPerSample = 8;
//-- wf.nBlockAlign = 1;
//-- wf.nAvgBytesPerSec = samplerate;
//-- wf.cbSize = 0;
//--
//-- // Set up DSBUFFERDESC structure.
//-- memset(&dsbdesc, 0, sizeof(DSBUFFERDESC)); // Zero it out.
//-- dsbdesc.dwSize = sizeof(DSBUFFERDESC);
//-- dsbdesc.dwFlags = DSBCAPS_PRIMARYBUFFER | DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_STICKYFOCUS;
//-- dsbdesc.dwBufferBytes = 0;
//-- dsbdesc.lpwfxFormat = NULL;
//--
//-- // Create buffer.
//-- hr = DSound->CreateSoundBuffer(&dsbdesc, &DSB1, NULL);
//-- DSB1->SetFormat(&wf);
//-- dsbcaps.dwSize=sizeof(DSBCAPS);
//-- DSB1->GetCaps(&dsbcaps);
//-- TSoundBufferSize=dsbcaps.dwBufferBytes;
//-- return hr;
//== return(0);
//==}
/****************************************************************************/
static void InitAudioDev(int sampleratein) {
//-- samplerate=sampleratein;
//-- DirectSoundEnabled=1;
//-- HRESULT hr;
//-- int dsect=0;
//-- dsect=1;
//-- hr = DirectSoundCreate(NULL, &DSound, NULL);
//-- if (hr != DS_OK) MessageBox(GETHWND,"Attempt to start DirectSound system failed","BeebEm",MB_ICONERROR|MB_OK);
//-- if(hr == DS_OK)
//-- {
//-- hr=DS_OK;
//-- if (UsePrimaryBuffer) {
//-- hr = DSound->SetCooperativeLevel(mainWin->GethWnd(), DSSCL_WRITEPRIMARY);
//-- if (hr == DSERR_UNSUPPORTED) {
//-- MessageBox(GETHWND,"Use of Primary DirectSound Buffer unsupported on this system. Using Secondary DirectSound Buffer instead",
//-- "BBC Emulator",MB_OK|MB_ICONERROR);
//-- UsePrimaryBuffer=0;
//-- }
//-- }
//-- if (!UsePrimaryBuffer) hr=DSound->SetCooperativeLevel(mainWin->GethWnd(),DSSCL_NORMAL);
//-- }
//-- if(hr == DS_OK)
//-- {
//-- dsect=2;
//-- if (UsePrimaryBuffer) hr = CreatePrimarySoundBuffer();
//-- else hr=CreateSecondarySoundBuffer();
//-- } else MessageBox(GETHWND,"Attempt to create DirectSound buffer failed","BeebEm",MB_ICONERROR|MB_OK);
//-- if (hr != DS_OK)
//-- {
//-- char errstr[200];
//-- sprintf(errstr,"Direct Sound initialisation failed on part %i\nFailure code %X",dsect,hr);
//-- MessageBox(GETHWND,errstr,"BBC Emulator",MB_OK|MB_ICONERROR);
//-- SoundReset();
//-- }
//-- mainWin->SetPBuff();
//--
//-- if (hr==DS_OK) SoundEnabled=1;
//++
DirectSoundEnabled=0;
samplerate = sampleratein;
SoundReset();
SoundEnabled=1;
//<-
}; /* InitAudioDev */
//==void LoadRelaySounds(void) {
//== /* Loads in the relay sound effects into buffers */
//== FILE *RelayFile;
//== char RelayFileName[256];
//== char *PRFN=RelayFileName;
//==
//==//-> strcpy(PRFN,RomPath);
//==//-- strcat(PRFN,"RelayOn.SND");
//==//++
//== strcpy(PRFN, DATA_DIR"/resources/relayon.snd");
//==//<-
//==
//== RelayFile=fopen(PRFN,"rb");
//== if (RelayFile!=NULL) {
//== fread(RelayOnBuf,1,2048,RelayFile);
//== fclose(RelayFile);
//== }
//== else {
//== char errstr[200];
//== sprintf(errstr,"Could not open Relay ON Sound");
//== MessageBox(GETHWND,errstr,"BBC Emulator",MB_OK|MB_ICONERROR);
//== }
//==//-> strcpy(PRFN,RomPath);
//==//-- strcat(PRFN,"RelayOff.SND");
//==//++
//== strcpy(PRFN, DATA_DIR"/resources/relayoff.snd");
//==//<-
//==
//== RelayFile=fopen(PRFN,"rb");
//== if (RelayFile!=NULL) {
//== fread(RelayOffBuf,1,2048,RelayFile);
//== fclose(RelayFile);
//== }
//== else {
//== char errstr[200];
//== sprintf(errstr,"Could not open Relay OFF Sound");
//== MessageBox(GETHWND,errstr,"BBC Emulator",MB_OK|MB_ICONERROR);
//== }
//==}
/****************************************************************************/
/* The 'freqval' variable is the value as sene by the 76489 */
static void SetFreq(int Channel, int freqval) {
unsigned int freq;
int ChangeSamps; /* Number of samples after which to change */
//fprintf(sndlog,"Channel %d - Value %d\n",Channel,freqval);
double t;
if (freqval==0) freqval=1;
if (freqval<5) Speech[Channel]=1; else Speech[Channel]=0;
/* if (freqval==0) {
ChangeSamps=INT_MAX;
} else { */
freq=4000000/(32*freqval);
///* if (freq>samplerate) {
// ChangeSamps=INT_MAX; // Way to high frequency - shut off
// } else {
// if (freq>(samplerate/2)) {
// // Hmm - a bit high - make it top out - change on every sample
// // What we should be doing is moving to sine wave at 1/6 samplerate
// ChangeSamps=2;
// } else { */
// ChangeSamps=(int)( (( (double)samplerate/(double)freq)/2.0) +SoundTuning);
// t=( (( (double)samplerate/(double)freq)/2.0) +SoundTuning);
// CSA[Channel]=(double)(t-ChangeSamps);
// CSC[Channel]=0;
// /* };
// }; // freq<=samplerate
// }; / * Freqval!=0 */
t=( (( (double)samplerate/(double)freq)/2.0) +SoundTuning);
ChangeSamps=(int)t;
CSA[Channel]=(double)(t-ChangeSamps);
CSC[Channel]=CSA[Channel]; // we look ahead, so should already include the fraction on the first update
if (Channel==1) {
CSC[0]=CSC[1];
}
BeebState76489.ChangeSamps[Channel]=ChangeSamps;
};
/****************************************************************************/
void AdjustSoundCycles(void) {
//== if (!UseHostClock) return;
//== if ((!DirectSoundEnabled) || (!SoundEnabled)) return; // it just lags the program if there's no sound
//==
//-- LARGE_INTEGER TickDiff;
//-- __int64 CycleDiff;
//-- // Get performance counter
//-- QueryPerformanceCounter(&CurrentPCount);
//-- TickDiff.QuadPart=CurrentPCount.QuadPart-LastPCount.QuadPart;
//-- CycleDiff=(__int64)(TickDiff.QuadPart*CycleRatio);
//-- if (CycleDiff>(SoundAutoTriggerTime/2)) {
//-- LastPCount.QuadPart=CurrentPCount.QuadPart;
//-- SoundCycles+=CycleDiff;
//-- }
}
void SoundTrigger_Real(void) {
// AdjustSoundCycles();
PlayTilNow();
SoundTrigger=SoundCycles+SoundAutoTriggerTime;
}; /* SoundTrigger_Real */
/*
*
* 6502core handles this now.
void Sound_Trigger(int NCycles) {
//STCycles+=NCycles;
//if (SoundTrigger2<=STCycles) {
// AdjustSoundCycles();
// SoundTrigger2=STCycles+100;
//}
//if (!UseHostClock) SoundCycles+=NCycles;
//== SoundCycles=TotalCycles;
SoundCycles+=NCycles;
if (SoundTrigger<=SoundCycles) SoundTrigger_Real();
// fprintf(sndlog,"SoundTrigger_Real was called from Sound_Trigger\n"); }
}
*/
void SoundChipReset(void) {
BeebState76489.LastToneFreqSet=0;
BeebState76489.ToneVolume[0]=0;
BeebState76489.ToneVolume[1]=BeebState76489.ToneVolume[2]=BeebState76489.ToneVolume[3]=GetVol(15);
BeebState76489.ToneFreq[0]=BeebState76489.ToneFreq[1]=BeebState76489.ToneFreq[2]=1000;
BeebState76489.ToneFreq[3]=1000;
BeebState76489.Noise.FB=0;
BeebState76489.Noise.Freq=0;
ActiveChannel[0]=FALSE;
ActiveChannel[1]=ActiveChannel[2]=ActiveChannel[3]=FALSE;
}
/****************************************************************************/
/* Called to enable sound output */
void SoundInit() {
//-- int pfr;
ClearTrigger(SoundTrigger);
LastBeebCycle=SoundCycles;
LastOurTime=(double)LastBeebCycle * (double)SoundSampleRate / 2000000.0;
OurTime=LastOurTime;
LastXtraCycles=TotalCycles;
bufptr=0;
InitAudioDev(SoundSampleRate);
if (SoundSampleRate == 44100) SoundAutoTriggerTime = 5000;
if (SoundSampleRate == 22050) SoundAutoTriggerTime = 10000;
if (SoundSampleRate == 11025) SoundAutoTriggerTime = 20000;
SampleAdjust=4;
// [HERE]
SoundBufferSize=111;
//== LoadRelaySounds();
bReRead=TRUE;
//-- if (UseHostClock) {
//-- pfr=QueryPerformanceFrequency(&PFreq); // Get timer resolution
//-- QueryPerformanceCounter(&LastPCount);
//-- CurrentPCount.QuadPart=LastPCount.QuadPart;
//-- CycleRatio=2000000.0/PFreq.QuadPart;
//-- }
SoundCycles=0; SoundTrigger=SoundAutoTriggerTime;
SoundTrigger2=TotalCycles+3000;
//+>
//printf("SAMPLE RATE = %d\n", SoundSampleRate);
InitializeSDLSound(SoundSampleRate); // 22050
//Sleep(4000);
//<+
}; /* SoundInit */
void SwitchOnSound(void) {
SetFreq(3,1000);
ActiveChannel[3]=TRUE;
BeebState76489.ToneVolume[3]=GetVol(15);
}
void SetSound(char State) {
if (!SoundEnabled) return;
if (State==MUTED) MuteSound();
}
/****************************************************************************/
/* Called to disable sound output */
void SoundReset(void) {
//-- if (DSB1 != NULL)
//-- {
//-- DSB1->Stop();
//-- DSB1->Release();
//-- DSB1 = NULL;
//-- }
//-- if (DSound != NULL)
//-- {
//-- DSound->Release();
//-- DSound = NULL;
//-- }
ClearTrigger(SoundTrigger);
SoundEnabled = 0;
//+>
FreeSDLSound();
//<+
} /* SoundReset */
/****************************************************************************/
/* Called in sysvia.cc when a write is made to the 76489 sound chip */
void Sound_RegWrite(int value) {
int trigger = 0;
unsigned char VolChange;
if (!SoundEnabled)
return;
VolChange=4;
if (!(value & 0x80)) {
unsigned val=BeebState76489.ToneFreq[BeebState76489.LastToneFreqSet] & 15;
/* Its changing the top half of the frequency */
val |= (value & 0x3f)<<4;
/* And update */
BeebState76489.ToneFreq[BeebState76489.LastToneFreqSet]=val;
SetFreq(BeebState76489.LastToneFreqSet+1,BeebState76489.ToneFreq[BeebState76489.LastToneFreqSet]);
trigger = 1;
} else {
/* Another register */
VolChange=0xff;
switch ((value>>4) & 0x7) {
case 0: /* Tone 3 freq */
// BeebState76489.ToneFreq[2]=(BeebState76489.ToneFreq[2] & 0x2f0) | (value & 0xf);
BeebState76489.ToneFreq[2]=(BeebState76489.ToneFreq[2] & 0x3f0) | (value & 0xf);
SetFreq(3,BeebState76489.ToneFreq[2]);
BeebState76489.LastToneFreqSet=2;
// trigger = 1;
break;
case 1: /* Tone 3 vol */
RealVolumes[3]=value&15;
if ((BeebState76489.ToneVolume[3]==0) && ((value &15)!=15)) ActiveChannel[3]=TRUE;
if ((BeebState76489.ToneVolume[3]!=0) && ((value &15)==15)) ActiveChannel[3]=FALSE;
BeebState76489.ToneVolume[3]=GetVol(15-(value & 15));
BeebState76489.LastToneFreqSet=2;
trigger = 1;
VolChange=3;
break;
case 2: /* Tone 2 freq */
// BeebState76489.ToneFreq[1]=(BeebState76489.ToneFreq[1] & 0x2f0) | (value & 0xf);
BeebState76489.ToneFreq[1]=(BeebState76489.ToneFreq[1] & 0x3f0) | (value & 0xf);
BeebState76489.LastToneFreqSet=1;
SetFreq(2,BeebState76489.ToneFreq[1]);
// trigger = 1;
break;
case 3: /* Tone 2 vol */
RealVolumes[2]=value&15;
if ((BeebState76489.ToneVolume[2]==0) && ((value &15)!=15)) ActiveChannel[2]=TRUE;
if ((BeebState76489.ToneVolume[2]!=0) && ((value &15)==15)) ActiveChannel[2]=FALSE;
BeebState76489.ToneVolume[2]=GetVol(15-(value & 15));
BeebState76489.LastToneFreqSet=1;
trigger = 1;
VolChange=2;
break;
case 4: /* Tone 1 freq (Possibly also noise!) */
// BeebState76489.ToneFreq[0]=(BeebState76489.ToneFreq[0] & 0x2f0) | (value & 0xf);
BeebState76489.ToneFreq[0]=(BeebState76489.ToneFreq[0] & 0x3f0) | (value & 0xf);
BeebState76489.LastToneFreqSet=0;
SetFreq(1,BeebState76489.ToneFreq[0]);
// trigger = 1;
break;
case 5: /* Tone 1 vol */
RealVolumes[1]=value&15;
if ((BeebState76489.ToneVolume[1]==0) && ((value &15)!=15)) ActiveChannel[1]=TRUE;
if ((BeebState76489.ToneVolume[1]!=0) && ((value &15)==15)) ActiveChannel[1]=FALSE;
BeebState76489.ToneVolume[1]=GetVol(15-(value & 15));
BeebState76489.LastToneFreqSet=0;
trigger = 1;
VolChange=1;
break;
case 6: /* Noise control */
BeebState76489.Noise.Freq=value &3;
BeebState76489.Noise.FB=(value>>2)&1;
trigger = 1;
break;
case 7: /* Noise volume */
if ((BeebState76489.ToneVolume[0]==0) && ((value &15)!=15)) ActiveChannel[0]=TRUE;
if ((BeebState76489.ToneVolume[0]!=0) && ((value &15)==15)) ActiveChannel[0]=FALSE;
RealVolumes[0]=value&15;
BeebState76489.ToneVolume[0]=GetVol(15-(value & 15));
trigger = 1;
VolChange=0;
break;
};
//if (VolChange<4) fprintf(sndlog,"Channel %d - Volume %d at %lu Cycles\n",VolChange,value &15,SoundCycles);
};
if /*(*/(trigger)/* && (!ReloadingChip))*/
{ SoundTrigger_Real(); }
}; /* Sound_RegWrite */
void DumpSound(void) {
}