NES: puNES acquireDirect(), part 3

reduce CPU usage a bit

src/engine/platform/nes.cpp

@@ -108,15 +108,11 @@ void DivPlatformNES::doWrite(int ts, unsigned short addr, unsigned char data) {
 void DivPlatformNES::acquire_puNES(blip_buffer_t** bb, size_t len) {
   for (int i=0; i<5; i++) {
     oscBuf[i]->begin(len);
+    nes->oscBuf[i]=oscBuf[i];
   }
 
   nes->timestamp=0;
   nes->bb=bb[0];
-  nes->S1.oscBuf=oscBuf[0];
-  nes->S2.oscBuf=oscBuf[1];
-  nes->TR.oscBuf=oscBuf[2];
-  nes->NS.oscBuf=oscBuf[3];
-  nes->DMC.oscBuf=oscBuf[4];
 
   for (size_t i=0; i<len; i++) {
     // heuristic

src/engine/platform/sound/nes/apu.cpp

@@ -220,6 +220,7 @@ void apu_tick(struct NESAPU* a, int len) {
       square_output(a->S1, 0)
       a->S1.frequency = (a->S1.timer + 1) << 1;
       a->S1.sequencer = (a->S1.sequencer + 1) & 0x07;
+      a->oscBuf[0]->putSample(a->timestamp,a->muted[0]?0:(a->S1.output<<11));
     }
 
     // SQUARE 2 TICK
@@ -227,6 +228,7 @@ void apu_tick(struct NESAPU* a, int len) {
       square_output(a->S2, 0)
       a->S2.frequency = (a->S2.timer + 1) << 1;
       a->S2.sequencer = (a->S2.sequencer + 1) & 0x07;
+      a->oscBuf[1]->putSample(a->timestamp,a->muted[1]?0:(a->S2.output<<11));
     }
 
     // TRIANGLE TICK
@@ -235,6 +237,7 @@ void apu_tick(struct NESAPU* a, int len) {
       if (a->TR.length.value && a->TR.linear.value) {
         a->TR.sequencer = (a->TR.sequencer + 1) & 0x1F;
         triangle_output()
+        a->oscBuf[2]->putSample(a->timestamp,a->muted[2]?0:(a->TR.output<<11));
       }
     }
 
@@ -248,6 +251,7 @@ void apu_tick(struct NESAPU* a, int len) {
       a->NS.shift &= 0x7FFF;
       noise_output()
       a->NS.frequency = noise_timer[a->apu.type][a->NS.timer];
+      a->oscBuf[3]->putSample(a->timestamp,a->muted[3]?0:(a->NS.output<<11));
     }
 
     // DMC TICK
@@ -276,6 +280,7 @@ void apu_tick(struct NESAPU* a, int len) {
         }
       }
       a->DMC.frequency = dmc_rate[a->apu.type][a->DMC.rate_index];
+      a->oscBuf[4]->putSample(a->timestamp,a->muted[4]?0:(a->DMC.output<<8));
     }
     if (a->DMC.empty && a->DMC.remain) {
       BYTE tick = 4;
@@ -324,12 +329,6 @@ void apu_tick(struct NESAPU* a, int len) {
       blip_add_delta(a->bb,a->timestamp,sample-a->lastSample);
       a->lastSample=sample;
     }
-    // output chan osc
-    a->S1.oscBuf->putSample(a->timestamp,a->muted[0]?0:(a->S1.output<<11));
-    a->S2.oscBuf->putSample(a->timestamp,a->muted[1]?0:(a->S2.output<<11));
-    a->TR.oscBuf->putSample(a->timestamp,a->muted[2]?0:(a->TR.output<<11));
-    a->NS.oscBuf->putSample(a->timestamp,a->muted[3]?0:(a->NS.output<<11));
-    a->DMC.oscBuf->putSample(a->timestamp,a->muted[4]?0:(a->DMC.output<<8));
     
     rem-=advance;
     a->timestamp++;

src/engine/platform/sound/nes/apu.h

@@ -342,8 +342,6 @@ typedef struct _apuSquare {
   _length_counter length;
   /* output */
   SWORD output;
-  /* Furnace: chan osc buffer */
-  DivDispatchOscBuffer* oscBuf;
 } _apuSquare;
 typedef struct _apuTriangle {
   /* timer */
@@ -358,8 +356,6 @@ typedef struct _apuTriangle {
   BYTE sequencer;
   /* output */
   SWORD output;
-  /* Furnace: chan osc buffer */
-  DivDispatchOscBuffer* oscBuf;
 } _apuTriangle;
 typedef struct _apuNoise {
   /* timer */
@@ -380,8 +376,6 @@ typedef struct _apuNoise {
   BYTE sequencer;
   /* output */
   SWORD output;
-  /* Furnace: chan osc buffer */
-  DivDispatchOscBuffer* oscBuf;
 } _apuNoise;
 typedef struct _apuDMC {
   /* ogni quanti cicli devo generare un output */
@@ -411,9 +405,6 @@ typedef struct _apuDMC {
 
   /* misc */
   BYTE tick_type;
-  
-  /* Furnace: chan osc buffer */
-  DivDispatchOscBuffer* oscBuf;
 }  _apuDMC;
 
 struct _nla_table {
@@ -438,6 +429,7 @@ struct NESAPU {
   int timestamp;
   int lastSample;
   unsigned char muted[5];
+  DivDispatchOscBuffer* oscBuf[5];
 };
 
 /* apuPeriod[mode][type][cycles] */

src/engine/platform/sound/nes/cpu_inline.h

@@ -202,6 +202,7 @@ INLINE static void apu_wr_reg(struct NESAPU* a, int ts, WORD address, BYTE value
         } else {
           a->DMC.counter = a->DMC.output = value;
         }
+        a->oscBuf[4]->putSample(a->timestamp,a->muted[4]?0:(a->DMC.output<<8));
 
         a->r4011.cycles = a->r4011.frames = 0;
         a->r4011.value = value;