earliest playback

no sound, just terminal output
2021-05-12 03:58:55 -05:00 · 2021-05-12 03:58:55 -05:00 · f810fc0c3c
commit f810fc0c3c
parent 9d17655836
15 changed files with 901 additions and 22 deletions
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@ -0,0 +1,118 @@
+#include "engine.h"
+
+void DivEngine::nextOrder() {
+  curRow=0;
+  if (++curOrder>=song.ordersLen) {
+    curOrder=0;
+  }
+}
+
+const char* notes[12]={
+  "C-", "C#", "D-", "D#", "E-", "F-", "F#", "G-", "G#", "A-", "A#", "B-"
+};
+
+const char* formatNote(unsigned char note, unsigned char octave) {
+  static char ret[4];
+  if (note==100) {
+    return "OFF";
+  } else if (octave==0) {
+    return "---";
+  }
+  snprintf(ret,4,"%s%d",notes[note%12],octave+note/12);
+  return ret;
+}
+
+void DivEngine::nextRow() {
+  static char pb[4096];
+  static char pb1[4096];
+  static char pb2[4096];
+  static char pb3[4096];
+  if (++curRow>=song.patLen) {
+    nextOrder();
+  }
+  strcpy(pb1,"");
+  strcpy(pb3,"");
+  for (int i=0; i<chans; i++) {
+    snprintf(pb,4095," %.2x",song.orders.ord[i][curOrder]);
+    strcat(pb1,pb);
+    
+    DivPattern* pat=song.pat[i]->data[curOrder];
+    snprintf(pb2,4095,"\x1b[37m %s",
+             formatNote(pat->data[curRow][0],pat->data[curRow][1]));
+    strcat(pb3,pb2);
+    if (pat->data[curRow][3]==255) {
+      strcat(pb3,"\x1b[m--");
+    } else {
+      snprintf(pb2,4095,"\x1b[1;32m%.2x",pat->data[curRow][3]);
+      strcat(pb3,pb2);
+    }
+    if (pat->data[curRow][2]==255) {
+      strcat(pb3,"\x1b[m--");
+    } else {
+      snprintf(pb2,4095,"\x1b[0;36m%.2x",pat->data[curRow][2]);
+      strcat(pb3,pb2);
+    }
+    for (int j=0; j<song.pat[i]->effectRows; j++) {
+      if (pat->data[curRow][4+(j<<1)]==255) {
+        strcat(pb3,"\x1b[m--");
+      } else {
+        snprintf(pb2,4095,"\x1b[1;31m%.2x",pat->data[curRow][4+(j<<1)]);
+        strcat(pb3,pb2);
+      }
+      if (pat->data[curRow][5+(j<<1)]==255) {
+        strcat(pb3,"\x1b[m--");
+      } else {
+        snprintf(pb2,4095,"\x1b[1;37m%.2x",pat->data[curRow][5+(j<<1)]);
+        strcat(pb3,pb2);
+      }
+    }
+  }
+  printf("| %.2x:%s | \x1b[1;33m%3d%s\x1b[m\n",curOrder,pb1,curRow,pb3);
+}
+
+void DivEngine::nextTick() {
+  if (song.customTempo) {
+    cycles=dispatch->rate/song.hz;
+  } else {
+    if (song.pal) {
+      cycles=dispatch->rate/60;
+    } else {
+      cycles=dispatch->rate/50;
+    }
+  }
+  if (--ticks<=0) {
+    if (speedAB) {
+      ticks=song.speed2*(song.timeBase+1);
+    } else {
+      ticks=song.speed1*(song.timeBase+1);
+    }
+    speedAB=!speedAB;
+    nextRow();
+  }
+}
+
+void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsigned int size) {
+  size_t runtotal=blip_clocks_needed(bb[0],size);
+  for (size_t i=0; i<runtotal; i++) {
+    if (--cycles<=0) {
+      nextTick();
+    }
+    dispatch->acquire(temp[0],temp[1]);
+
+    blip_add_delta(bb[0],i,temp[0]-prevSample[0]);
+    blip_add_delta(bb[1],i,temp[1]-prevSample[1]);
+    prevSample[0]=temp[0];
+    prevSample[1]=temp[1];
+  }
+
+  blip_end_frame(bb[0],runtotal);
+  blip_end_frame(bb[1],runtotal);
+
+  blip_read_samples(bb[0],bbOut[0],size,0);
+  blip_read_samples(bb[1],bbOut[1],size,0);
+
+  for (size_t i=0; i<size; i++) {
+    out[0][i]=(float)bbOut[0][i]/32768.0;
+    out[1][i]=(float)bbOut[1][i]/32768.0;
+  }
+}