change reasonable-synth to be sample accurate (note on/off)

[ardour.git] / libs / plugins / reasonablesynth.lv2 / rsynth.c

diff --git a/libs/plugins/reasonablesynth.lv2/rsynth.c b/libs/plugins/reasonablesynth.lv2/rsynth.c
index a6c74aa26c1e2057e62582053dc1e0f2415394b2..68bd81714db997ad7d1007aa08a8e479a47f7f79 100644 (file)
--- a/libs/plugins/reasonablesynth.lv2/rsynth.c
+++ b/libs/plugins/reasonablesynth.lv2/rsynth.c
@@ -186,22 +186,25 @@ static void synthesize_sineP (RSSynthChannel* sc,
     float env = adsr_env(sc, note);
     if (sc->adsr_cnt[note] == 0) break;
     const float amp = vol * env;
-
-    left[i]  += amp * sinf(2.0 * M_PI * phase);
-    left[i]  += .300 * amp * sinf(2.0 * M_PI * phase * 2.0);
-    left[i]  += .150 * amp * sinf(2.0 * M_PI * phase * 3.0);
-    left[i]  += .080 * amp * sinf(2.0 * M_PI * phase * 4.0);
-  //left[i]  -= .007 * amp * sinf(2.0 * M_PI * phase * 5.0);
-  //left[i]  += .010 * amp * sinf(2.0 * M_PI * phase * 6.0);
-    left[i]  += .020 * amp * sinf(2.0 * M_PI * phase * 7.0);
-    phase += fq;
-    right[i] += amp * sinf(2.0 * M_PI * phase);
-    right[i] += .300 * amp * sinf(2.0 * M_PI * phase * 2.0);
-    right[i] += .150 * amp * sinf(2.0 * M_PI * phase * 3.0);
-    right[i] -= .080 * amp * sinf(2.0 * M_PI * phase * 4.0);
-  //right[i] += .007 * amp * sinf(2.0 * M_PI * phase * 5.0);
-  //right[i] += .010 * amp * sinf(2.0 * M_PI * phase * 6.0);
-    right[i] -= .020 * amp * sinf(2.0 * M_PI * phase * 7.0);
+    if (amp > 1e-10) {
+      left[i]  += amp * sinf(2.0 * M_PI * phase);
+      left[i]  += .300 * amp * sinf(2.0 * M_PI * phase * 2.0);
+      left[i]  += .150 * amp * sinf(2.0 * M_PI * phase * 3.0);
+      left[i]  += .080 * amp * sinf(2.0 * M_PI * phase * 4.0);
+      //left[i]  -= .007 * amp * sinf(2.0 * M_PI * phase * 5.0);
+      //left[i]  += .010 * amp * sinf(2.0 * M_PI * phase * 6.0);
+      left[i]  += .020 * amp * sinf(2.0 * M_PI * phase * 7.0);
+      phase += fq;
+      right[i] += amp * sinf(2.0 * M_PI * phase);
+      right[i] += .300 * amp * sinf(2.0 * M_PI * phase * 2.0);
+      right[i] += .150 * amp * sinf(2.0 * M_PI * phase * 3.0);
+      right[i] -= .080 * amp * sinf(2.0 * M_PI * phase * 4.0);
+      //right[i] += .007 * amp * sinf(2.0 * M_PI * phase * 5.0);
+      //right[i] += .010 * amp * sinf(2.0 * M_PI * phase * 6.0);
+      right[i] -= .020 * amp * sinf(2.0 * M_PI * phase * 7.0);
+    } else {
+      phase += fq;
+    }
     if (phase > 1.0) phase -= 2.0;
   }
   sc->phase[note] = phase;
@@ -221,7 +224,7 @@ static void process_key (void *synth,
   RSSynthChannel* sc = &rs->sc[chn];
   const int8_t vel = sc->miditable[note];
   const int8_t msg = sc->midimsgs[note];
-  const float vol = /* master_volume */ 0.25 * fabsf(vel) / 127.0;
+  const float vol = /* master_volume */ 0.1 * fabsf(vel) / 127.0;
   const float phase = sc->phase[note];
   sc->midimsgs[note] = 0;
 
@@ -399,8 +402,9 @@ static uint32_t synth_sound (void *synth, uint32_t written, const uint32_t nfram
     uint32_t nremain = nframes - written;
 
     if (rs->boffset >= BUFFER_SIZE_SAMPLES)  {
-      rs->boffset = 0;
-      synth_fragment(rs, BUFFER_SIZE_SAMPLES, rs->buf[0], rs->buf[1]);
+      const uint32_t tosynth = MIN(BUFFER_SIZE_SAMPLES, nremain);
+      rs->boffset = BUFFER_SIZE_SAMPLES - tosynth;
+      synth_fragment(rs, tosynth, &(rs->buf[0][rs->boffset]), &(rs->buf[1][rs->boffset]));
     }
 
     uint32_t nread = MIN(nremain, (BUFFER_SIZE_SAMPLES - rs->boffset));