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PlatformIO package of the Teensy core framework compatible with GCC 10 & C++20
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framework-arduinoteensy-cxx20/libraries/Audio/examples/Synthesis/Wavetable/Zelda/Zelda.ino

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  1. /* Play Zelda music, Overland Theme from The Wind Walker

  2. 

  3.    Reference for this music:

  4.    https://www.youtube.com/watch?v=RekBzP114do&t=1091s

  5. 

  6.    Requires Audio Shield: https://www.pjrc.com/store/teensy3_audio.html

  7. */

  8. 

  9. #include <Bounce.h>

  10. #include <Audio.h>

  11. #include <Wire.h>

  12. #include <SPI.h>

  13. #include <SD.h>

  14. #include <SerialFlash.h>

  15. 

  16. #include "Pizzicato_samples.h"

  17. #include "Viola_samples.h"

  18. #include "WT_Trumpet_samples.h"

  19. #include "MutedTrumpet_samples.h"

  20. #include "PlaySynthMusic.h"

  21. 

  22. //#define DEBUG_ALLOC

  23. 

  24. unsigned char *sp = score;

  25. 

  26. const int TOTAL_VOICES = 64;

  27. const int TOTAL_MIXERS = 21;

  28. const int SECONDARY_MIXERS = 4;

  29. 

  30. AudioControlSGTL5000 sgtl5000_1;

  31. AudioSynthWavetable wavetable[TOTAL_VOICES];

  32. AudioMixer4 mixer[TOTAL_MIXERS];

  33. AudioOutputI2S i2s1;

  34. AudioConnection patchCord[] = {

  35. 	{wavetable[ 0], 0, mixer[ 0], 0}, {wavetable[ 1], 0, mixer[ 0], 1}, {wavetable[ 2], 0, mixer[0],  2}, {wavetable[ 3], 0, mixer[0],  3}, {mixer[ 0], 0, mixer[TOTAL_MIXERS-2], 0},

  36. 	{wavetable[ 4], 0, mixer[ 1], 0}, {wavetable[ 5], 0, mixer[ 1], 1}, {wavetable[ 6], 0, mixer[1],  2}, {wavetable[ 7], 0, mixer[1],  3}, {mixer[ 1], 0, mixer[TOTAL_MIXERS-2], 1},

  37. 	{wavetable[ 8], 0, mixer[ 2], 0}, {wavetable[ 9], 0, mixer[ 2], 1}, {wavetable[10], 0, mixer[2],  2}, {wavetable[11], 0, mixer[2],  3}, {mixer[ 2], 0, mixer[TOTAL_MIXERS-2], 2},

  38. 	{wavetable[12], 0, mixer[ 3], 0}, {wavetable[13], 0, mixer[ 3], 1}, {wavetable[14], 0, mixer[3],  2}, {wavetable[15], 0, mixer[3],  3}, {mixer[ 3], 0, mixer[TOTAL_MIXERS-2], 3},

  39. 	{wavetable[16], 0, mixer[ 4], 0}, {wavetable[17], 0, mixer[ 4], 1}, {wavetable[18], 0, mixer[4],  2}, {wavetable[19], 0, mixer[4],  3}, {mixer[ 4], 0, mixer[TOTAL_MIXERS-3], 0},

  40. 	{wavetable[20], 0, mixer[ 5], 0}, {wavetable[21], 0, mixer[ 5], 1}, {wavetable[22], 0, mixer[5],  2}, {wavetable[23], 0, mixer[5],  3}, {mixer[ 5], 0, mixer[TOTAL_MIXERS-3], 1},

  41. 	{wavetable[24], 0, mixer[ 6], 0}, {wavetable[25], 0, mixer[ 6], 1}, {wavetable[26], 0, mixer[6],  2}, {wavetable[27], 0, mixer[6],  3}, {mixer[ 6], 0, mixer[TOTAL_MIXERS-3], 2},

  42. 	{wavetable[28], 0, mixer[ 7], 0}, {wavetable[29], 0, mixer[ 7], 1}, {wavetable[30], 0, mixer[7],  2}, {wavetable[31], 0, mixer[7],  3}, {mixer[ 7], 0, mixer[TOTAL_MIXERS-3], 3},

  43. 	{wavetable[32], 0, mixer[ 8], 0}, {wavetable[33], 0, mixer[ 8], 1}, {wavetable[34], 0, mixer[8],  2}, {wavetable[35], 0, mixer[8],  3}, {mixer[ 8], 0, mixer[TOTAL_MIXERS-4], 0},

  44. 	{wavetable[36], 0, mixer[ 9], 0}, {wavetable[37], 0, mixer[ 9], 1}, {wavetable[38], 0, mixer[9],  2}, {wavetable[39], 0, mixer[9],  3}, {mixer[ 9], 0, mixer[TOTAL_MIXERS-4], 1},

  45. 	{wavetable[40], 0, mixer[10], 0}, {wavetable[41], 0, mixer[10], 1}, {wavetable[42], 0, mixer[10], 2}, {wavetable[43], 0, mixer[10], 3}, {mixer[10], 0, mixer[TOTAL_MIXERS-4], 2},

  46. 	{wavetable[44], 0, mixer[11], 0}, {wavetable[45], 0, mixer[11], 1}, {wavetable[46], 0, mixer[11], 2}, {wavetable[47], 0, mixer[11], 3}, {mixer[11], 0, mixer[TOTAL_MIXERS-4], 3},

  47. 	{wavetable[48], 0, mixer[12], 0}, {wavetable[49], 0, mixer[12], 1}, {wavetable[50], 0, mixer[12], 2}, {wavetable[51], 0, mixer[12], 3}, {mixer[12], 0, mixer[TOTAL_MIXERS-5], 0},

  48. 	{wavetable[52], 0, mixer[13], 0}, {wavetable[53], 0, mixer[13], 1}, {wavetable[54], 0, mixer[13], 2}, {wavetable[55], 0, mixer[13], 3}, {mixer[13], 0, mixer[TOTAL_MIXERS-5], 1},

  49. 	{wavetable[56], 0, mixer[14], 0}, {wavetable[57], 0, mixer[14], 1}, {wavetable[58], 0, mixer[14], 2}, {wavetable[59], 0, mixer[14], 3}, {mixer[14], 0, mixer[TOTAL_MIXERS-5], 2},

  50. 	{wavetable[60], 0, mixer[15], 0}, {wavetable[61], 0, mixer[15], 1}, {wavetable[62], 0, mixer[15], 2}, {wavetable[63], 0, mixer[15], 3}, {mixer[15], 0, mixer[TOTAL_MIXERS-5], 3},

  51. 	{mixer[TOTAL_MIXERS-2], 0, mixer[TOTAL_MIXERS-1], 0},

  52. 	{mixer[TOTAL_MIXERS-3], 0, mixer[TOTAL_MIXERS-1], 1},

  53. 	{mixer[TOTAL_MIXERS-4], 0, mixer[TOTAL_MIXERS-1], 2},

  54. 	{mixer[TOTAL_MIXERS-5], 0, mixer[TOTAL_MIXERS-1], 3},

  55. 	{mixer[TOTAL_MIXERS-1], 0, i2s1, 0},

  56. 	{mixer[TOTAL_MIXERS-1], 0, i2s1, 1},

  57. };

  58. Bounce buttons[] = { {0, 15}, {1, 15}, {2, 15}, };

  59. const int TOTAL_BUTTONS = sizeof(buttons) / sizeof(Bounce);

  60. 

  61. void guitarHeroMode();

  62. void printVoices();

  63. void setVolume() {

  64. 	sgtl5000_1.volume(0.8*(analogRead(PIN_A2)-1)/1022.0);

  65. }

  66. 

  67. struct voice_t {

  68. 	int wavetable_id;

  69. 	byte channel;

  70. 	byte note;

  71. };

  72. voice_t voices[TOTAL_VOICES];

  73. 

  74. IntervalTimer midiMapTimer;

  75. IntervalTimer guitarHeroTimer;

  76. IntervalTimer volumeTimer;

  77. 

  78. void setup() {

  79. 	Serial.begin(115200);

  80. 

  81. 

  82. 	pinMode(0, INPUT_PULLUP);

  83. 	pinMode(1, INPUT_PULLUP);

  84. 	pinMode(2, INPUT_PULLUP);

  85. 

  86. 	AudioMemory(120);

  87. 

  88. 	sgtl5000_1.enable();

  89. 	sgtl5000_1.volume(0.8);

  90. 

  91. 	for (int i = 0; i < TOTAL_VOICES; ++i) {

  92. 		wavetable[i].setInstrument(Pizzicato);

  93. 		wavetable[i].amplitude(1);

  94. 		voices[i].wavetable_id = i;

  95. 		voices[i].channel = voices[i].note = 0xFF;

  96. 	}

  97. 

  98. 	for (int i = 0; i < TOTAL_MIXERS-1; ++i)

  99. 		for (int j = 0; j < 4; ++j)

  100. 			mixer[i].gain(j, 0.25);

  101. 	for (int i = 0; i < 4; ++i)

  102. 		mixer[TOTAL_MIXERS - 1].gain(i, 0.5);

  103. 	

  104. 	//usbMIDI.setHandleNoteOn(OnNoteOn);

  105. 	//usbMIDI.setHandleNoteOff(OnNoteOff);

  106. 	//volumeTimer.begin(setVolume, 100000);

  107. 	//guitarHeroTimer.begin(guitarHeroMode, 1000000/120);

  108. 	//midiMapTimer.begin(printVoices, 5000);

  109. 

  110.   delay(2000);

  111. }

  112. 

  113. void loop() {

  114.   unsigned char c,opcode,chan;

  115.   unsigned long d_time;

  116.   

  117.   // read the next note from the table

  118.   c = *sp++;

  119.   opcode = c & 0xF0;

  120.   chan = c & 0x0F;

  121. 

  122.   if(c < 0x80) {

  123.     // Delay

  124.     d_time = (c << 8) | *sp++;

  125.     delay(d_time);

  126.     return;

  127.   }

  128.   if(*sp == CMD_STOP) {

  129.     for (int i=0; i<TOTAL_VOICES; i++) {

  130.       wavetable[chan].stop();

  131.     }

  132.     while(1);

  133.   }

  134. 

  135.   // It is a command

  136. 

  137.   //Change the instrument for generator

  138.   if(opcode == CMD_CHANGEINST) {

  139.     unsigned char inst = *sp++;

  140.     wavetable[chan].stop();

  141.     switch(inst) {

  142.       case 48:

  143.         wavetable[chan].setInstrument(Viola);

  144.         break;

  145.       case 57:

  146.         wavetable[chan].setInstrument(WT_Trumpet);

  147.         break;

  148.       default:

  149.         wavetable[chan].setInstrument(MutedTrumpet);

  150.         break;

  151.     }

  152.     return;

  153.   }

  154.   

  155.   // Stop the note on 'chan'

  156.   if(opcode == CMD_STOPNOTE) {

  157.     wavetable[chan].stop();

  158.     return;

  159.   }

  160.   

  161.   // Play the note on 'chan'

  162.   if(opcode == CMD_PLAYNOTE) {

  163.     unsigned char note = *sp++;

  164.     unsigned char velocity = *sp++;

  165.     wavetable[chan].playNote((byte)note);

  166.     //OnNoteOn(chan, (byte)note, (byte)velocity);

  167.     return;

  168.   }

  169. 

  170.   // replay the tune

  171.   if(opcode == CMD_RESTART) {

  172.     sp = score;

  173.     return;

  174.   }

  175. 

  176. 	//usbMIDI.read();

  177. 	//for (int i = 0; i < TOTAL_BUTTONS; ++i) buttons[i].update();

  178. 	//if (buttons[0].fallingEdge()) AudioSynthWavetable::print_performance();

  179. 	//if (buttons[1].risingEdge()) {

  180. 	//	midiMapTimer.end();

  181. 	//	Serial.print('\n');

  182. 	//}

  183. 	//if (buttons[1].fallingEdge()) midiMapTimer.begin(printVoices, 5000);

  184. 	//if (buttons[2].risingEdge()) guitarHeroTimer.end();

  185. 	//if (buttons[2].fallingEdge())

  186. 	//	guitarHeroTimer.begin(guitarHeroMode, 1000000/60);

  187. }

  188. 

  189. int allocateVoice(byte channel, byte note);

  190. int findVoice(byte channel, byte note);

  191. void freeVoices();

  192. 

  193. int used_voices = 0;

  194. int stopped_voices = 0;

  195. int evict_voice = 0;

  196. int notes_played = 0;

  197. 

  198. void OnNoteOn(byte channel, byte note, byte velocity) {

  199. 	notes_played++;

  200. #ifdef DEBUG_ALLOC

  201. 	//Serial.printf("**** NoteOn: channel==%hhu,note==%hhu ****\n", channel, note);

  202. 	printVoices();

  203. #endif //DEBUG_ALLOC

  204. 	freeVoices();

  205. 	int wavetable_id = allocateVoice(channel, note);

  206.   switch (channel) {

  207.     case 1:

  208.       wavetable[wavetable_id].setInstrument(Pizzicato);

  209.       break;

  210.     case 2:

  211.       wavetable[wavetable_id].setInstrument(Pizzicato);

  212.       break;

  213.     case 3:

  214.       wavetable[wavetable_id].setInstrument(Pizzicato);

  215.       break;

  216.     case 4:

  217.       wavetable[wavetable_id].setInstrument(Pizzicato);

  218.       break;

  219.     case 5:

  220.       wavetable[wavetable_id].setInstrument(Pizzicato);

  221.       break;

  222.     default:

  223.       wavetable[wavetable_id].setInstrument(Pizzicato);

  224.       break;

  225.   }

  226. 	wavetable[wavetable_id].playNote(note);

  227. #ifdef DEBUG_ALLOC

  228. 	printVoices();

  229. #endif //DEBUG_ALLOC

  230. }

  231. 

  232. void OnNoteOff(byte channel, byte note, byte velocity) {

  233. #ifdef DEBUG_ALLOC

  234. 	//Serial.printf("\n**** NoteOff: channel==%hhu,note==%hhu ****", channel, note);

  235. 	printVoices();

  236. #endif //DEBUG_ALLOC

  237. 	int wavetable_id = findVoice(channel, note);

  238. 	if (wavetable_id != TOTAL_VOICES)

  239. 		wavetable[wavetable_id].stop();

  240. #ifdef DEBUG_ALLOC

  241. 	printVoices();

  242. #endif //DEBUG_ALLOC

  243. }

  244. 

  245. int allocateVoice(byte channel, byte note) {

  246. 	int i;

  247. 	int nonfree_voices = stopped_voices + used_voices;

  248. 	if (nonfree_voices < TOTAL_VOICES) {

  249. 		for (i = nonfree_voices; i < TOTAL_VOICES && voices[i].channel != channel; ++i);

  250. 		if (i < TOTAL_VOICES) {

  251. 			voice_t temp = voices[i];

  252. 			voices[i] = voices[nonfree_voices];

  253. 			voices[nonfree_voices] = temp;

  254. 		}

  255. 		i = nonfree_voices;

  256. 		used_voices++;

  257. 	} else {

  258. 		if (stopped_voices) {

  259. 			i = evict_voice % stopped_voices;

  260. 			voice_t temp = voices[i];

  261. 			stopped_voices--;

  262. 			voices[i] = voices[stopped_voices];

  263. 			voices[stopped_voices] = temp;

  264. 			used_voices++;

  265. 			i = stopped_voices;

  266. 		}

  267. 		else

  268. 			i = evict_voice;

  269. 	}

  270. 

  271. 	voices[i].channel = channel;

  272. 	voices[i].note = note;

  273. 

  274. 	evict_voice++;

  275. 	evict_voice %= TOTAL_VOICES;

  276. 

  277. 	return voices[i].wavetable_id;

  278. }

  279. 

  280. int findVoice(byte channel, byte note) {

  281. 	int i;

  282. 	//find match

  283. 	int nonfree_voices = stopped_voices + used_voices;

  284. 	for (i = stopped_voices; i < nonfree_voices && !(voices[i].channel == channel && voices[i].note == note); ++i);

  285. 	//return TOTAL_VOICES if no match

  286. 	if (i == (nonfree_voices)) return TOTAL_VOICES;

  287. 

  288. 	voice_t temp = voices[i];

  289. 	voices[i] = voices[stopped_voices];

  290. 	voices[stopped_voices] = temp;

  291. 	--used_voices;

  292. 

  293. 	return voices[stopped_voices++].wavetable_id;

  294. }

  295. 

  296. void freeVoices() {

  297. 	for (int i = 0; i < stopped_voices; i++)

  298. 		if (wavetable[voices[i].wavetable_id].isPlaying() == false) {

  299. 			voice_t temp = voices[i];

  300. 			--stopped_voices;

  301. 			voices[i] = voices[stopped_voices];

  302. 			int nonfree_voices = stopped_voices + used_voices;

  303. 			voices[stopped_voices] = voices[nonfree_voices];

  304. 			voices[nonfree_voices] = temp;

  305. 		}

  306. }

  307. 

  308. void guitarHeroMode() { // now unicorn friendly

  309. 	const int RESET = 4;

  310. 	const int MIDI_NOTES = 128;

  311. 	static char line[MIDI_NOTES+1] = { 0 };

  312. 	static int accumulated = 0;

  313. 	if (!accumulated) {

  314. 		for (int i = 0; i < MIDI_NOTES; ++i) line[i] = '-';

  315. 		++accumulated;

  316. 	}

  317. 	for (int i = stopped_voices; i < used_voices+stopped_voices; ++i) line[voices[i].note] = '*';

  318. 	if (accumulated == RESET) {

  319. 		Serial.println(line);

  320. 		accumulated = 0;

  321. 	} else {

  322. 		++accumulated;

  323. 	}

  324. }

  325. 

  326. const char* note_map[] = {

  327. 	"C","C#","D","D#","E","F","F#","G","G#","A","A#","B"

  328. };

  329. 

  330. void printVoices() {

  331. 	static int last_notes_played = notes_played;

  332. 	if (last_notes_played == notes_played)

  333. 		return;

  334. 	last_notes_played = notes_played;

  335. 	int usage = AudioProcessorUsage();

  336. 	Serial.printf("\nCPU:%03i voices:%02i CPU/Voice:%02i evict:%02i", usage, used_voices, usage/used_voices, evict_voice);

  337. 	for (int i = 0; i < used_voices; ++i)

  338. 		Serial.printf(" %02hhu %-2s", voices[i].channel, note_map[voices[i].note%12]);

  339. 

  340. }