spinal cord
attempt at tracker style music
Diff: main.cpp
- Revision:
- 15:209481812170
- Parent:
- 13:8ce494870ba6
--- a/main.cpp Sat Nov 17 16:33:51 2018 +0000
+++ b/main.cpp Thu Feb 07 11:02:56 2019 +0000
@@ -2,62 +2,17 @@
#include "HWSound.h"
#include "snd.h"
#include "tune.h"
+#include "gfx.h"
Pokitto::Core mygame;
Pokitto::Display d;
-//------------------------[ Button handling, very accurate ]------------------------
-#define HELD 0
-#define NEW 1
-#define RELEASE 2
-byte CompletePad, ExPad, TempPad, myPad;
-bool _A[3], _B[3], _C[3], _Up[3], _Down[3], _Left[3], _Right[3];
-
-DigitalIn _aPin(P1_9);
-DigitalIn _bPin(P1_4);
-DigitalIn _cPin(P1_10);
-DigitalIn _upPin(P1_13);
-DigitalIn _downPin(P1_3);
-DigitalIn _leftPin(P1_25);
-DigitalIn _rightPin(P1_7);
-
-void UPDATEPAD(int pad, int var) {
- _C[pad] = (var >> 1)&1;
- _B[pad] = (var >> 2)&1;
- _A[pad] = (var >> 3)&1;
- _Down[pad] = (var >> 4)&1;
- _Left[pad] = (var >> 5)&1;
- _Right[pad] = (var >> 6)&1;
- _Up[pad] = (var >> 7)&1;
-}
-
-void UpdatePad(int joy_code){
- ExPad = CompletePad;
- CompletePad = joy_code;
- UPDATEPAD(HELD, CompletePad); // held
- UPDATEPAD(RELEASE, (ExPad & (~CompletePad))); // released
- UPDATEPAD(NEW, (CompletePad & (~ExPad))); // newpress
-}
-
-byte updateButtons(byte var){
- var = 0;
- if (_cPin) var |= (1<<1);
- if (_bPin) var |= (1<<2);
- if (_aPin) var |= (1<<3); // P1_9 = A
- if (_downPin) var |= (1<<4);
- if (_leftPin) var |= (1<<5);
- if (_rightPin) var |= (1<<6);
- if (_upPin) var |= (1<<7);
-
- return var;
-}
-
typedef struct{
bool playSample;
int soundPoint;
const uint8_t *currentSound;
- int currentSoundSize;
+ uint32_t currentSoundSize;
int volume;
int speed;
int repeat;
@@ -68,57 +23,78 @@
uint32_t nextBufferIndexToFill = 0;
uint32_t nextT = 0;
+uint32_t oldBufIndex=0;
int currentLine=0;
int mytick=0;
-
+int pattern=0;
+
+uint32_t myDelay;
+uint32_t tempTime;
+uint32_t sndTime;
+
-// note_speed << octave. = speed to play sample
+Ticker sounder;
+Ticker sounder1;
+
+bool playMusic = 1;
+
+const char *noteNames[] = {"--","C ","C#","D ","D#","E ","F ","F#","G ","G#","A ","A#","B "};
-int note_speed[]={ 27,30,16,18,20,21,24, 29,0 ,17,19,0 ,23,25};
-// A B C D E F G A# B# C# D# E# F# G#
-
+const int note_speed[]={
+16,17,18,19,20,21,23,24,25,27,29,30, // C, C#, D, D#, E, F, F#, G, G#, A, A#, B,
+32,34,36,38,40,43,45,48,51,54,57,60,
+64,68,72,76,81,85,91,96,102,108,114,121,
+128,136,144,152,161,171,181,192,203,215,228,242,
+256,271,287,304,323,342,362,384,406,431,456,483,
+512,542,575,609,645,683,724,767,813,861,912,967,
+1024,1085,1149,1218,1290,1367,1448,1534,1625,1722,1825,1933,
+2048,2170,2299,2435,2580,2734,2896,3068,3251,3444,3649,3866,
+4096,4339,4598,4871,5161,5467,5793,6137,6502,6889,7298,7732,};
-void emptyBuffer(){
- for(int t=0; t<SBUFSIZE;){
- soundbuf[++t]=0;
+// new playsound function
+uint8_t playSound(int channel, const unsigned char *sound, int volume = 255, int speed=255, int repeat=0){
+
+ // get sound length
+ int soundSize = 0;
+ for(int t=0; t<4; t++){
+ soundSize <<= 8;
+ soundSize |= sound[t] & 0xFF;
}
- for(int t=0; t<4; t++){
- snd[t].playSample=0;
+ int sampleRate = 0;
+ for(int t=0; t<2; t++){
+ sampleRate <<= 8;
+ sampleRate |= sound[t+4] & 0xFF;
}
+ float spd = (POK_AUD_FREQ / (float)sampleRate);
+
+ snd[channel].currentSound = sound; // sound to play
+ snd[channel].volume = volume; // volume
+ snd[channel].speed = (speed/spd); // recalculated above
+ snd[channel].currentSoundSize = soundSize; // length of sound array adjusted for speed change
+ snd[channel].soundPoint = 0; // where the current sound is upto
+ snd[channel].repeat = repeat; // repeat point
+ snd[channel].playSample = 1; // trigger sample playing
+
+ return channel;
+
}
-uint8_t playSound(int channel, const unsigned char *sound, uint16_t soundSize, int volume = 255, int speed=255, int repeat=0){
-/*
- int channel=0;
- for(int t=0; t<4; t++){
- if(snd[t].playSample==0){
- channel=t;
- }
- }
-*/
- snd[channel].currentSound = sound;
- snd[channel].currentSoundSize = (soundSize*255)/speed;
- snd[channel].soundPoint = 0;
- snd[channel].playSample = 1;
- snd[channel].volume = volume;
- snd[channel].speed = speed;
- snd[channel].repeat = repeat;
-
- return channel;
-}
uint8_t mixSound(int samplePos)
{
int temp = 0;
- int ss[4];
-
+ signed int ss[4];
for(int s=0; s<4; s++){
- ss[s] = (snd[s].currentSound[(snd[s].soundPoint*snd[s].speed)>>8]*snd[s].volume>>8) * snd[s].playSample;
- ++snd[s].soundPoint;
- if(snd[s].soundPoint >= snd[s].currentSoundSize){
+ int currentPos = (snd[s].soundPoint*snd[s].speed)>>8;
+ ss[s] = snd[s].currentSound[currentPos] -127;
+ ss[s] *= snd[s].volume;
+ ss[s] /= 256;
+ ss[s] *= snd[s].playSample; // will be 1 or 0, if not playing, will silence
+ snd[s].soundPoint++;
+ if( currentPos >= snd[s].currentSoundSize){
if(snd[s].repeat){
snd[s].soundPoint=0;
}else{
@@ -126,91 +102,108 @@
snd[s].soundPoint=0;
}
}
- }
-
-
-// temp = (ss[0] + ss[1] + ss[2] + ss[3]) - (ss[0] * ss[1] * ss[2] * ss[3]);
- temp = ((127 - ss[0] + ss[1] + ss[2] + ss[3])/4)+127;
-
- return temp;
-}
-
-// Fills an audio buffer with the samples generated by the Bytebeat function
-void generateBuffer(uint32_t bufferIndex, uint32_t nextT) {
-
- //bufferIndex = (currentBuffer + 2)&3;
-
- uint32_t index= 0;
- for(uint32_t t=0; t<BUFFER_SIZE; t++,index++){
- uint8_t sample = mixSound(t);
- buffers[bufferIndex][index] = sample;
- }
-
-}
-
-
-void updateSample(){
-
- int quart = soundbufindex / 512;
- int sndOffset[]={512,1024,1536,0};
-
- if(oldQuart != quart){
- oldQuart = quart;
- for(int t=0; t<SBUFSIZE/4;){
- uint8_t sample = mixSound(t);
- soundbuf[t+sndOffset[quart]] = sample;
-
- for(int s=0; s<4; s++){
- ++snd[s].soundPoint;
- if(snd[s].soundPoint >= snd[s].currentSoundSize){
- if(snd[s].repeat){
- snd[s].soundPoint=0;
- }else{
- snd[s].playSample=0;
- }
- }
- }
- t++;
- }
- }
-
+ }
+ temp = (ss[0] + ss[1] + ss[2] + ss[3])/4;
+ return temp +127;
}
void update_tune(){
- for(int t=0; t<4; t++){
- char note = tune[pattern][currentLine][t][0];
- char octave = tune[pattern][currentLine][t][1];
- char instrument = tune[pattern][currentLine][t][2];
- char volume = tune[pattern][currentLine][t][3] * 4;
-
- if(note > 0){
-
- int speed = (note_speed[note-1] << octave); // >> 1
+ if(playMusic==1){
+
+ char pat = my_pattern[pattern];
+
+ int special = 0;
+ for(int t=0; t<4; t++){
+ int note = tune[pat][currentLine][t][0];
+ int octave = tune[pat][currentLine][t][1]; // no longer used
+ int volume = tune[pat][currentLine][t][2];// max volume from xm/mod was 64
+ int instrument = tune[pat][currentLine][t][3];
+ special = tune[pat][currentLine][t][4];
+
+ if(special == 22){
+ // 22 = F in MOD format. 0.02 = 1 'tick'
+ sounder.detach();
+ sounder.attach(&update_tune, 0.02 * tune[pat][currentLine][t][5]); // speed of song
+ }
+
+
+ // if valid volume change, change it, if not use previous
+ if(volume >=128){
+ volume -=128;
+ volume *= 4;
+ }else{
+ // don't change volume
+ volume = snd[t].volume;
+ }
+
- switch(instrument){
- case 1:
- playSound(t, s_01, sizeof(s_01), volume, speed, sampleRepeat[0]);
- break;
- case 2:
- playSound(t, s_02, sizeof(s_02), volume, speed, sampleRepeat[1]);
- break;
- case 3:
- playSound(t, s_03, sizeof(s_03), volume, speed, sampleRepeat[2]);
- break;
- case 4:
- playSound(t, s_04, sizeof(s_04), volume, speed, sampleRepeat[3]);
- break;
+ if(note > 0){
+
+ //int speed = (note_speed[note-1] << octave) /2;
+ int speed = note_speed[note-1];
+ for(int s=1; s<octave; s++){
+ speed *=2;
+ }
+
+ switch(instrument){
+ case 1: playSound(t, s_01, volume, speed, sampleRepeat[instrument-1]); break;
+ case 2: playSound(t, s_02, volume, speed, sampleRepeat[instrument-1]); break;
+ case 3: playSound(t, s_03, volume, speed, sampleRepeat[instrument-1]); break;
+ case 4: playSound(t, s_04, volume, speed, sampleRepeat[instrument-1]); break;
+ case 5: playSound(t, s_05, volume, speed, sampleRepeat[instrument-1]); break;
+ case 6: playSound(t, s_06, volume, speed, sampleRepeat[instrument-1]); break;
+ case 7: playSound(t, s_07, volume, speed, sampleRepeat[instrument-1]); break;
+ case 8: playSound(t, s_08, volume, speed, sampleRepeat[instrument-1]); break;
+ case 9: playSound(t, s_09, volume, speed, sampleRepeat[instrument-1]); break;
+ case 10: playSound(t, s_10, volume, speed, sampleRepeat[instrument-1]); break;
+ case 11: playSound(t, s_11, volume, speed, sampleRepeat[instrument-1]); break;
+ case 12: playSound(t, s_12, volume, speed, sampleRepeat[instrument-1]); break;
+ case 13: playSound(t, s_13, volume, speed, sampleRepeat[instrument-1]); break;
+ }
}
+
+ snd[t].volume = volume;
+
}
-
- snd[t].volume = volume;
-
+
+ // patterns are 64 lines long, or until special code 20.
+ if(currentLine++==63 || special == 20){
+ currentLine=0;
+ if(++pattern>=sizeof(my_pattern))pattern=0;
+ }
+
+ } // playMusic
+}
+
+
+int beatCounter;
+void update_buffer(){
+
+ int quart = soundbufindex / 512;
+ int sndOffset[]={1024,1536,0,512};
+
+ if(oldQuart != quart){
+ oldQuart = quart;
+ for(int t=0; t<=SBUFSIZE/4;){
+ uint8_t sample = mixSound(t);
+ soundbuf[t+sndOffset[quart]] = sample;
+ t++;
+ }
+// if(beatCounter++==3){
+// beatCounter=0;
+// update_tune();
+// }
}
-
- if(currentLine++==63){
- currentLine=0;
- pattern++;
+
+}
+
+// print text
+void print(uint16_t x, uint16_t y, const char* text){
+ for(uint8_t t = 0; t < strlen(text); t++){
+ uint8_t character = text[t];
+ d.drawBitmap(x,y,tinyfont[character]);
+ x += 4;
}
}
@@ -218,58 +211,72 @@
int main ()
{
mygame.begin();
- mygame.setFrameRate(255);
-// emptyBuffer(); // clear the sound buffer
-
- // The audio engine uses 4 buffers. Generate all 4 buffers ahead.
- uint32_t nextT = 0;
- generateBuffer(0, nextT); nextT += BUFFER_SIZE;
- generateBuffer(1, nextT); nextT += BUFFER_SIZE;
- generateBuffer(2, nextT); nextT += BUFFER_SIZE;
- generateBuffer(3, nextT); nextT += BUFFER_SIZE;
-
- // Set global audio variables
- currentBuffer = 0;
- currentPtr = buffers[currentBuffer];
- endPtr = currentPtr + BUFFER_SIZE;
+ mygame.setFrameRate(255);
// Init audio stream.
pokPlayStream(); // activate stream
mygame.sound.ampEnable(true);
mygame.sound.playMusicStream();
-
-
- uint32_t nextBufferIndexToFill = 0;
+
+ sounder.attach(&update_tune, 0.08); // speed of song
+
+
+ d.load565Palette(&tinyfont_pal[0]);
while (mygame.isRunning())
{
-// updateSample();
-
- // Fill the next buffer if it is not used currently
- if((uint32_t)currentBuffer != nextBufferIndexToFill) {
- // Generate buffer
- generateBuffer(nextBufferIndexToFill, nextT);
-
- if(++nextBufferIndexToFill > 3)
- nextBufferIndexToFill = 0;
- nextT += BUFFER_SIZE;
- }
-
- if(++mytick==2){
- mytick=0;
-
- update_tune();
- }
-
+ update_buffer();
+
if (mygame.update())
{
- // update buttons
- myPad = updateButtons(myPad);
- UpdatePad(myPad);
-
d.color = 1;
- d.printf("Tick %d", mytick);
- d.printf("Line %d", currentLine);
+ //d.printf("Pattern %d\n", pattern);
+ //d.printf("Line %d\n", currentLine);
+
+ char pat = my_pattern[pattern];
+
+ char tempText[20];
+
+ int s1=currentLine-5;
+ if(s1<0)s1=0;
+ int s2 = currentLine+5;
+ if(s2>63)s2=63;
+
+ sprintf(tempText,"T[%2d] P[%2d] L[%2d]",pattern,pat,currentLine);
+ print(0,0,tempText);
+
+ int s;
+ for(s=s1; s<s2; s++){
+
+ for(int t=0; t<4; t++){
+ int note = tune[pat][s][t][0];
+ int octave = tune[pat][s][t][1]; // no longer used
+ int volume = tune[pat][s][t][2];// max volume from xm/mod was 64
+ int instrument = tune[pat][s][t][3];
+ int special = tune[pat][s][t][4];
+
+ if(volume >=128){
+ volume -=128;
+ }
+
+ int x1 = t*27;
+ int y1 = ((8-currentLine)+s)*6;
+
+ if(s == currentLine || s == currentLine+1){
+ d.setColor(5);
+ d.drawLine(0, y1-1, 219, y1-1);
+ }
+
+ print(x1,y1,noteNames[note]);
+ sprintf(tempText,"%d",octave);
+ print(x1 + 8,y1,tempText);
+ sprintf(tempText,"%d",volume);
+ print(x1 + 12,y1,tempText);
+ sprintf(tempText,"%2d|",instrument);
+ print(x1 + 16,y1,tempText);
+
+ }
+ }
}
}