Re-add note_off_fast, gain ~2% MIDI boost

Author: earlephilhower

lib/TinySoundFont

@@ -440,7 +440,7 @@ int AudioGeneratorMIDI::PlayMIDI() {
                 for (tgnum = 0; tgnum < num_tonegens; ++tgnum) {    /* find which generator is playing it */
                     tg = &tonegen[tgnum];
                     if (tg->playing && tg->track == tracknum && tg->note == trk->note) {
-                        tsf_note_off/*_fast*/(g_tsf, tg->instrument, tg->note);//, tg->playIndex);
+                        tsf_note_off_fast(g_tsf, tg->instrument, tg->note, tg->playIndex);
                         tg->playing = false;
                         tg->playIndex = -1;
                         trk->tonegens[tgnum] = false;

src/AudioGeneratorMIDI.cpp

@@ -2052,11 +2052,11 @@ TSFDEF int tsf_note_on(tsf* f, int preset_index, int key, float vel)
 		tsf_voice_lfo_setup(&voice->modlfo, region->delayModLFO, region->freqModLFO, f->outSampleRate);
 		tsf_voice_lfo_setup(&voice->viblfo, region->delayVibLFO, region->freqVibLFO, f->outSampleRate);
 	}
-//#ifndef TSF_SAMPLES_SHORT
+#ifndef TSF_SAMPLES_SHORT
 	return 1;
-//#else
-//        return voicePlayIndex + 1;
-//#endif
+#else
+        return voicePlayIndex + 1;
+#endif
 }
 
 TSFDEF int tsf_bank_note_on(tsf* f, int bank, int preset_number, int key, float vel)
@@ -2086,12 +2086,10 @@ TSFDEF void tsf_note_off(tsf* f, int preset_index, int key)
 	}
 }
 
-#if 0
-// Less than 0.5% speed difference seen w/fast
 /**
  * Stops all voices with the given playing index. If no key provided or if -1, fallbacks to tsf_note_off
  */
-TSFDEF void tsf_note_off_fast(tsf* f, int preset_index, int key, int playIndex = -1)
+TSFDEF void tsf_note_off_fast(tsf* f, int preset_index, int key, int playIndex)
 {
   if (playIndex < 0) {
       tsf_note_off(f, preset_index, key);
@@ -2104,7 +2102,6 @@ TSFDEF void tsf_note_off_fast(tsf* f, int preset_index, int key, int playIndex =
       }
   }
 }
-#endif
 
 TSFDEF int tsf_bank_note_off(tsf* f, int bank, int preset_number, int key)
 {