X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=pcsx_rearmed.git;a=blobdiff_plain;f=plugins%2Fdfsound%2Fspu.c;h=791b27eb7bff176189f176124b34c31841708160;hp=7b435ac695bbf12c62ac1fb7db3e85921f14e83b;hb=b1094d0ef5dce90b6c344e7616ca0acd10050c7e;hpb=381ea10346ab85b2f2d46f33d28461211e239c0a

diff --git a/plugins/dfsound/spu.c b/plugins/dfsound/spu.c
index 7b435ac6..791b27eb 100644
--- a/plugins/dfsound/spu.c
+++ b/plugins/dfsound/spu.c
@@ -79,7 +79,7 @@ unsigned char * pMixIrq=0;
 
 // user settings
 
-int             iVolume=3;
+int             iVolume=768; // 1024 is 1.0
 int             iXAPitch=1;
 int             iUseTimer=2;
 int             iSPUIRQWait=1;
@@ -93,7 +93,8 @@ int             iUseInterpolation=2;
 SPUCHAN         s_chan[MAXCHAN+1];                     // channel + 1 infos (1 is security for fmod handling)
 REVERBInfo      rvb;
 
-unsigned long   dwNoiseVal=1;                          // global noise generator
+unsigned int    dwNoiseVal;                            // global noise generator
+unsigned int    dwNoiseCount;
 int             iSpuAsyncWait=0;
 
 unsigned short  spuCtrl=0;                             // some vars to store psx reg infos
@@ -320,35 +321,6 @@ INLINE int FModChangeFrequency(int ch,int ns)
 
 ////////////////////////////////////////////////////////////////////////
 
-// noise handler... just produces some noise data
-// surely wrong... and no noise frequency (spuCtrl&0x3f00) will be used...
-// and sometimes the noise will be used as fmod modulation... pfff
-
-INLINE int iGetNoiseVal(int ch)
-{
- int fa;
-
- if((dwNoiseVal<<=1)&0x80000000L)
-  {
-   dwNoiseVal^=0x0040001L;
-   fa=((dwNoiseVal>>2)&0x7fff);
-   fa=-fa;
-  }
- else fa=(dwNoiseVal>>2)&0x7fff;
-
- // mmm... depending on the noise freq we allow bigger/smaller changes to the previous val
- fa=s_chan[ch].iOldNoise+((fa-s_chan[ch].iOldNoise)/((0x001f-((spuCtrl&0x3f00)>>9))+1));
- if(fa>32767L)  fa=32767L;
- if(fa<-32767L) fa=-32767L;              
- s_chan[ch].iOldNoise=fa;
-
- if(iUseInterpolation<2)                               // no gauss/cubic interpolation?
- s_chan[ch].SB[29] = fa;                               // -> store noise val in "current sample" slot
- return fa;
-}                                 
-
-////////////////////////////////////////////////////////////////////////
-
 INLINE void StoreInterpolationVal(int ch,int fa)
 {
  if(s_chan[ch].bFMod==2)                               // fmod freq channel
@@ -631,6 +603,8 @@ make_do_samples(simple, , ,
 
 static int do_samples_noise(int ch, int ns, int ns_to)
 {
+ int level, shift, bit;
+
  s_chan[ch].spos += s_chan[ch].sinc * (ns_to - ns);
  while (s_chan[ch].spos >= 28*0x10000)
  {
@@ -638,8 +612,25 @@ static int do_samples_noise(int ch, int ns, int ns_to)
   s_chan[ch].spos -= 28*0x10000;
  }
 
+ // modified from DrHell/shalma, no fraction
+ level = (spuCtrl >> 10) & 0x0f;
+ level = 0x8000 >> level;
+
  for (; ns < ns_to; ns++)
-  ChanBuf[ns] = iGetNoiseVal(ch);
+ {
+  dwNoiseCount += 2;
+  if (dwNoiseCount >= level)
+  {
+   dwNoiseCount -= level;
+   shift = (dwNoiseVal >> 10) & 0x1f;
+   bit = (0x69696969 >> shift) & 1;
+   if (dwNoiseVal & 0x8000)
+    bit ^= 1;
+   dwNoiseVal = (dwNoiseVal << 1) | bit;
+  }
+
+  ChanBuf[ns] = (signed short)dwNoiseVal;
+ }
 
  return -1;
 }
@@ -661,12 +652,8 @@ static int do_samples_noise(int ch, int ns, int ns_to)
 
 static void *MAINThread(void *arg)
 {
+ int volmult = iVolume;
  int ns,ns_from,ns_to;
-#if !defined(_MACOSX) && !defined(__arm__)
- int voldiv = iVolume;
-#else
- const int voldiv = 2;
-#endif
  int ch,d;
  int bIRQReturn=0;
 
@@ -837,12 +824,14 @@ static void *MAINThread(void *arg)
   else
   for (ns = 0; ns < NSSIZE*2; )
    {
-    d = SSumLR[ns] / voldiv; SSumLR[ns] = 0;
+    d = SSumLR[ns]; SSumLR[ns] = 0;
+    d = d * volmult >> 10;
     ssat32_to_16(d);
     *pS++ = d;
     ns++;
 
-    d = SSumLR[ns] / voldiv; SSumLR[ns] = 0;
+    d = SSumLR[ns]; SSumLR[ns] = 0;
+    d = d * volmult >> 10;
     ssat32_to_16(d);
     *pS++ = d;
     ns++;
@@ -1056,7 +1045,6 @@ long CALLBACK SPUinit(void)
  memset((void *)&rvb, 0, sizeof(REVERBInfo));
  InitADSR();
 
- iVolume = 3;
  spuIrq = 0;
  spuAddr = 0xffffffff;
  bEndThread = 0;