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Change var names

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This commit is contained in:
Miloslav Číž 2020-09-12 18:53:30 +02:00
parent d312b26eb8
commit f9fcfa4bf4
1 changed files with 20 additions and 20 deletions
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40
sounds.h
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@ -38,9 +38,9 @@
struct struct
{ // all should be initialized to 0 { // all should be initialized to 0
uint8_t track; uint8_t track;
uint32_t t; uint32_t t; // time variable/parameter
uint32_t t2; uint32_t t2; // stores t squared, for better performance
uint32_t n11t; uint32_t n11t; // stores a multiple of 11, for better performance
} SFG_MusicState; } SFG_MusicState;
/** /**
@ -63,41 +63,41 @@ uint8_t SFG_getNextMusicSample()
uint32_t result; uint32_t result;
#define t SFG_MusicState.t #define T SFG_MusicState.t
#define t2 SFG_MusicState.t2 #define T2 SFG_MusicState.t2
#define n11t SFG_MusicState.n11t #define N11T SFG_MusicState.n11t
switch (SFG_MusicState.track) // individual music tracks switch (SFG_MusicState.track) // individual music tracks
{ {
case 0: case 0:
{ {
uint32_t a = ((t >> 7) | (t >> 9) | (~t << 1) | t); uint32_t a = ((T >> 7) | (T >> 9) | (~T << 1) | T);
result = ((t) & 65536 ? (a & (((t2) >> 16) & 0x09)) : ~a); result = ((T) & 65536 ? (a & (((T2) >> 16) & 0x09)) : ~a);
t2 += t; SFG_MusicState.t2 += T;
break; break;
} }
case 1: case 1:
{ {
result = (t & (3 << (((t >> 10) ^ ((t >> 10) << (t >> 6)))))); result = (T & (3 << (((T >> 10) ^ ((T >> 10) << (T >> 6))))));
break; break;
} }
case 2: case 2:
{ {
result = result = ~((((T >> (T >> 2)) | (T >> (T >> 5))) & 0x12) << 1) | (T >> 11);
~((((t >> (t >> 2)) | (t >> (t >> 5))) & 0x12) << 1) | (t >> 11);
break; break;
} }
case 3: case 3:
{ {
result = result =
((((t >> (t >> 2)) + (t >> (t >> 7)))) & 0x3f | (t >> 5) | (t >> 11)) ((((T >> (T >> 2)) + (T >> (T >> 7)))) & 0x3f | (T >> 5) | (T >> 11))
& (t & (32768 | 8192) ? 0xf0 : 0x30); & (T & (32768 | 8192) ? 0xf0 : 0x30);
break; break;
} }
@ -105,20 +105,20 @@ uint8_t SFG_getNextMusicSample()
case 4: case 4:
{ {
result = result =
((0x47 >> (t >> 9)) & (t >> t)) | (0x57 >> (t >> 7)) | ((0x47 >> (T >> 9)) & (T >> T)) | (0x57 >> (T >> 7)) |
(0x06 >> (t >> (((n11t) >> 14) & 0x0e))); (0x06 >> (T >> (((N11T) >> 14) & 0x0e)));
n11t += 11; SFG_MusicState.n11t += 11;
break; break;
} }
case 5: case 5:
{ {
uint32_t a = t >> (t >> 6); uint32_t a = T >> (T >> 6);
uint32_t b = 0x011121 >> ((a + t) >> 11); uint32_t b = 0x011121 >> ((a + T) >> 11);
result = result =
(((t >> 9) + (t ^ (t << 1))) & (0x7f >> ((t >> 15) & 0x03))) & (b + a); (((T >> 9) + (T ^ (T << 1))) & (0x7f >> ((T >> 15) & 0x03))) & (b + a);
break; break;
} }